This motor has now made it even more crucial to change your oil religiously. So i just watched a video where this motor was torn down. Its honestly a amazing motor, a lot more to go wrong but that's the sacrifice. Its a pain to do any engine work if it really came to it. The tear down video showed everything in the engine to be extremely healthy and clean even after a failure. The failure of this engine, so far is only the bearings and piston side skirt coatings. With time and a little bit more R&D on bearing materials and side skirt coating this engine will be very promising and reliable. During the tear down the bearing spun and the material was all caught by the oil filer which was fantastic, keeping the whole engine very clean and healthy. Honestly if the bearings and side skirt coating get addressed which i wouldnt see it being very hard since its only two issues and lets be honest its probably a money thing, this engine will be a very successful and reliable motor. Nissan please put the extra effort into the next revision of this engine and address these two issues.
Luminous65 having Variable compression in one engine is going to put a lot of stress on that engine not to mention it’s a turbo and they do fail before the engine will fail and they can destroy the engine. On top of that it’s Nissan they aren’t the most reliable care company.
@@pattycarljackson ok but you can adjust boost to make engine really close to N/A on high CR or increase boost for low cr and high compression ratio is not always bad, Mazda make engine with compression ratio about 14:1 and this make their job right And it is True about nissan
Luminous65 it’s Nissan I’d never trust any of their CVT’s, Automatics, or this new engine. Let’s wait a couple of years and see how well these engines actually hold up. People think because it’s new means it’s reliable and that is absolutely not the case.
This is VC turbo, powerful engineering the better porformens is better the future, advice speed and technology. Nissan innovation that excites, distributed by courtesy garage.
This is actually a revolutionary design because even though there are added parts from the Compression ratio Actuator thing, You can see that the design made the engine run smooth enough by itself, that it doesn't need any balancer anymore. Plus, the crankshaft is offset, which allows the combustion stroke to be much more linear, where not only the Efficiency is upped, but also gives less stress on the piston and the crank. So, the lifetime could be possibly lengthened if the design is improved even further?
Engineer have been struggling for decades to find a perfect solution for compression problem of high speed engines , here there have done it eventually .. awesome 💪🚗🚗
What you are saying is the equivalent of being afraid that a crankshaft or connecting rod will break. It's like being afraid that one of the 2 crankshafts of an opposite piston engine will break. So why not take a 3-cylinder engine, the real problem with having more moving parts is that they do not hold, in fact, this engine will prevent the cylinders from turning into ovals and the connecting rods at the time of exploration will be exposed to less stress. in terms of the new parts because it's like being afraid of breaking a crankshaft
Shed MX I love Nissan more than others, I love the culture, the history, the glory of motorsport with nismo, with such a great car and great machines. but, it doesnt say that I love that car which you said earlier, like honda they have terrible creation also, toyota has, mitsu has, every single damn car company has. so shut your mouth and sit down ! you dont really have to criticize other people interest so on their love in car or engines. so is my reply above answered your question ?
Hukukul Ibat just becuse i ask if he liked the bad creations, it does not mean that im critcizing his intrest. So dont jump to conclusions. And dont be rude
This is an amazing engine design that variable compression rate is not achieve solely by valve timing but actually varying the stroke. the no lateral force on down stroke is also achieved with the design. It's an expensive engine to make with more mechanical components.
Удивительно! Это действительно очень толковая концепция! Великолепно! Пара минусов - бо́льшая материалоёмкость - это бо́льшая масса двигателя. И бо́льшее количество элементов - снижение надёжности. Но с современными материалами это не проблема. Также понравилось, что кинематика такого кривошипно-шатунного механизма эффективнее (проход "верхней мёртвой точки"), чем классического. Молодцы!
It's sad to say the balance shafts are there for high rpm balance as well and Nissan went and f'd it up trying to be efficient on a turbo engine....trying to physically move the crank upward when off throttle leaning out the motor...how would this take affect in a cvt trans vehicle whilst moving 15mph and then proceeding to punch it then let off after reaching top of the rpm band while in sport leaving it in "1st"...
Clayson Webster not possible the don’t design engines to explode that way..... you think they will just explode when something like that is new and they only build it to explode.... no they don’t......
But Shinichi Kiga, Nissan's chief powertrain engineer, told me the VC-Turbo engine creates less friction than a regular engine. The secret: Nissan engineers moved the crankshaft out from being directly underneath the pistons' bores and offset it about 15 degrees. That, in combination with the multilink assembly, eliminates the usual side forces that act on a piston as it travels in the cylinder. In other words, the piston is pushed and pulled straight and up down in each cylinder.
The federal entity is opening an investigation involving over 450,000 Nissan Rogue, Nissan Altima, and Infiniti QX50 models, which use those two engines. According to the NHTSA, owners are reporting knocking sounds, loss of power, metal bits in their oil pans, and even total failures. Nissan has made changes to the engines' main bearings and L-links since they've been on sale to address potential engine damage; however, a recall hasn't been issued yet.
VC-Turbo engine + CVT?! What is that, 50 mpg city, 100 mpg highway?! Sounds great! Unfortunately, I still want my V8 after this 2015 altima 3.5SL finally dies on me... whenever that is considering it's clockwork maintenance and overkill with the fluid flushes for me! 392 V8 are going away next year, but not only do I like no car payments, i'm 100% sure I can get this altima of mine to 200,000 miles! Ah what to do!
I've seen a tractor engine from the maybe 60s designed to run on any available fuel, so it had a large screw in the head. Turn it in, it increases compression. And that was it.
Trazendo essa tecnologia para os carros flex até mesmo aspirado seria um sucesso, uma maior taxa de compressão para o etanol, uma menor para gasolina, até mesmo uma alta taxa para o gnv... Muito promissora essa tecnologia.
@ffhgu 07Nissan's Variable compression engine is a wonderful design it will adjust to good or poor fuel quality by automatically adjusting the fuel ratio now try that in some other engines which comes with a specific grade fuel rating.
yes sir. 100% agree. the VQ is really hands down one of Nissans greatest acheivements. the power, reliability and ease of maintenance has been totally underrated over its lifetime.
Being a newish concept brought to the market by Nissan, this will inevitably explode spectacularly at depressingly frequent intervals, be picked up by no other manufacturer, and quietly get dropped in a few years time. Enjoy!
Calculator yeah, successful stuff like Honda 4 wheel steering, Yamaha 5 valves per cylinder, or anything made by Daihatsu. Apologies to all you Daihatsu fans btw.
Olivier Haman yes, I am sure the corporate lawyers at the stand alone and totally independent manufacturer ‘infinity’ will be immersed in volumes of litigation regarding infringement of their steadfastly original and copyrighted design, that in no way is the work of a parent company. Noob.
Like other GDI engines, direct injection while in high compression mode would screw up backs of the valves as happen in GDI engines (such as those of KIA).
Right. All that new development just for 26 mpg. Combustion Engine tech has reached its peak. Any new improvement will be very small but will require huge amount of resources to achieve. Battery Storage technology is the growing field and is the future.
This seems very interesting but I feel its the Cadillac v8-6/4 of its time. Not going to take off very well, overly complicated for our time but will spawn many ideas for future engines
I guess I don’t understand, the first thing I noticed is that for a stroke of the piston you are moving the output shaft 90° where in a conventional engine for a single stroke of the piston removing the output or the crankshaft 180°. Somehow the extra energy that is gained by variable compression ratio Hass to make up for this and more
Why is NHITSA looking into having Nissan recall the VC turbo engines? My 2022 (only 10K miles) runs just fine, lots of power. I sure don't want my engine replaced via a recall, it'll never be the same.
im with you on that but you are aware that Toyota, Honda , VW, Audi, and more have CVT now. and alot of Hondas CVT are having major issues specially toyota and there hybrids and corollas. NIssan was one of the first to bring it out yea.
@@robacejr Not sure about your common CVT used in most other popular car manufacturer's products because the Infiniti QX AWD Turbo's all use a rear wheel transmission double clutch drive system - not the usual competitions CVT at all, as you suggest? Also Infinity guarantee their great products with one of the very best 72 month warranties too? I think y'all need to study the Infinity QX AWD VC-T series a bit more before making fools of yourselves in public. Infinity are making great AWD SUV products now. Anyway even the Nissan rogues cvt transmissions you seem to be hung up on, are reliably tested to 200,000 + miles just the same as Toyota Mazda Honda and all the other cheap popular cars. Except Nissan have five times the experience at it.
It seems as though the variable compression is used in this case to increase reliabilityin high boost mode. This is great on paper but in practice it leads to a very narrow power band and low efficiency: cite: brm h16/v16. I would think the variable compression would be better set to low for startup and not much else in this case. I would like to see more data on how it is used in high power modes of operation, and that it does indeed actively change compression under high demand to limit the narrow power band found in low compression high boost engines. Until then i will still have little confidence in this and similar technologies. Thanks
Круто! Приятно знать что мы куда то всё таки двигаемся в вопросах двигателестроения. С другой стороны, увеличение массы, поднятие центра тяжести и влияние на конечную стоимость, думаю не позволят реализовать эту технологию в таком виде.
Most people on here are ignorant. These motors are really well designed and reliable with good solid tech behind it. Even though infiniti really used the most potential out of this motor it’s a good solid option for people who want a nice car with reliability. If your car isn’t reliable it’s probably because it’s clapped and never well maintenanced
Im a longtime Nissan owner. presently a 2016 Maxima and a F150 (not Nissan). The new altima brings the variable compression engine to the masses. I'm Concerned about long term reliability.
As a mechanic I love the video, very impressive, but spending all that time in developing a combustion engine is wasted. The electric motor is still much better.
Electric is a fad, plus there will never be the electric infrastructure to support everyone charging their cars and large haul trucks. California barely has the infrastructure to run everyone’s AC with out brown outs, how do you charge cars at the same time. My outlander get 42 miles per gallon. You have any idea how far I can drive on the cost of an electric car battery? Battery cars are a joke. The Phev from Mitsubishi is the electric future. Internal combustion electric , like a locomotive drivetrain. Most efficient.
I dont know if they use the same engines and technology on 2024 Altimas but I rented one 2 days ago from Chicago then traveled to Seattle in 2 days. Dodge Charger was the car they gave me but I thought it would be pricy for me to drive 2K miles then I asked for something with better fuel consumption, then they offered me 2024 Nissan Altima SV. TBH I never liked Nissans at all thats why I wasn't very happy with they second offer but I knew it will save me bucks on gas so I took it. Once I hit the road I started loving it with every second, amazing things that impressed me were - insulation, low RPM on high speeds, smooth ride, design. RPM never went over 2K at 80MPH, 2.5K at 90MPH and 3K at 100MPH. Sometimes even at 100MPH the RPM would fall down to 2.5K when on straight long road. My average speed was 90MPH thats because you dont feel the speed at all, I felt like I was in one of those Japanese bullet trains - FAST and SILENT. No engine sounds, no asphalt humming, no wind whistles, bumps and small potholes felt like nothing. The ride was smooth, stable, comfy, and fast. I love Nissan Altima now, I wanna change my 2025 Corolla SE Nightshade now. 200$ for 87 regular gas for the whole trip. I felt the innovation the engineers worked on. Great job Nissan.
Well, turbo adds boost and increases the amount of air you can push in the cylinder, so yeah, it adds compression (that's why turbocharged engines usually have lower compression ratios compared to naturally aspirated engines, so they don't knock), but at low loads (cruising for example), the boost provided by the turbo isn't so high, you could easily increase the engine's efficiency by raising the compression ratio... This is exactly what is done here. To recap: higher compression ratios = Better efficiency High RPM/load on the engine = high boost from the turbo -> Engine's compression ratio is lowered to avoid knocking while delivering high power output Low RPM/load on the engine = low boost from the turbo -> You can get away with increased compression ratio to increase efficiency without knocking.
Correct me if I'm wrong, but as you mentioned above you should get same or similar results/effect by using a variable turbo geometry? Or can a VTG not adjust that much? I'd really like to now more about potential benefits of this system, because the engine has to carry a significant higher rotationally and translationally mass. Anyone knows about the engine size?
Well, there are several notions to take into account, and compression ratio is only one of them. The main problem when it comes to turbochargers and compression ratios in a gasoline engine is to not exceed a certain internal cylinder pressure when the piston reaches its top dead center. If you exceed a set pressure, you will end up with an engine "knocking". "Knocking" is a phenomenon where the air/fuel mixture combusts all at once in an uncontrolled manner, and it usually appears before the piston can receive its power stroke, before reaching top-dead center. Not only do you loose power since the burnt air/fuel mixture pushes down on the piston while it is still going "up", it also is very destructive and must be avoided at all costs. A turbocharger, being variable geometry or not, cannot provide its full boost at any RPM and any throttle application... It needs exhaust gases to spool up and incease the intake manifold pressure. To be able to deliver its full boost, you need to open your throttle wide and/or reach a certain engine RPM so your exhaust gases keep it spooling up. As I stated before, compression ratios for turbocharged engines are lower than naturally aspirated engines, simply because you have to take into account the maximum cylinder pressure your turbo can provide at full boost... But that also means that, at lower loads (low rpm and/or low throttle application), when your turbo isn't providing its max boost, you are far from reaching your maximum cylinder pressure before knocking... That basically means that your engine isn't as efficient as it could be. With a variable compression ratio, you can always have that internal cylinder pressure as close as possible to the maximum, regardless of throttle application and turbo intake pressure. Your turbo being a variable geometry only makes it spool faster, or sooner at lower RPM and provide a little more boost than a normal turbo at low/medium RPMs, but that's all. As for knocking, to be more specific, there are ways to prevent it or make it happen at higher cylinder pressures: gasoline with higher grades (octane) makes knocking happen at higher pressures, therefore, you can have higher compression ratios which translates into more specific power and a more efficient engine. You can also have a richer air/fuel mixture, tweak the valves timing/opening.
That does not change the fact that, at cruising speed, your turbo can't deliver its maximum boost... The problem with the turbo, whatever technology it is using or how tuned it is, is that its boost is dependant on your driving conditions (RPM and throttle application). As I stated before, at cruise speed, your turbo can't deliver its full boost... Therefore, with a fixed compression ratio (which is dependant on your piston distance travel and how "close" it gets to the valves) your cylinder pressure isn't optimal... Since your turbo pressure is stabilised and it can't deliver more boost unless you put your foot down on the throttle, the only way to increase cylinder pressure and reach its optimal range is by increasing the compression ratio. Look at the video, it shows exactly that: - when you put your foot down, the engine gains RPM, the engine exhaust gas production is increased, which in turns spools up the turbo, which increases the intake pressure => The compression ratio is lowered beacause in this driving condition (with the turbo at full boost), the internal cylinder pressure is reached easily. - when ou cruise, the RPM is lower, exhaust gases production is lowered, and the turbo spins slower => intake pressure is reduced. Since the intake pressure is decreased, the internal cylinder pressure is lower at fixed compression ratio. The compression ratio is then increased to maintain the cylinder pressure in its optimal range. Don't conflate cylinder pressure and compression ratio, they may be linked, but they are two seperate parameters.
If anyone from Nissan is monitoring, please explain what you have done to mitigate problems with intake valve fouling, so common with some GDI engines.
Does it just have two CR settings or does it move anywhere between the 8 and 10 CR? if u could tune it to stay at a certain compression ratio and turn up the boost might be a fun engine/car
This motor has now made it even more crucial to change your oil religiously. So i just watched a video where this motor was torn down. Its honestly a amazing motor, a lot more to go wrong but that's the sacrifice. Its a pain to do any engine work if it really came to it. The tear down video showed everything in the engine to be extremely healthy and clean even after a failure. The failure of this engine, so far is only the bearings and piston side skirt coatings. With time and a little bit more R&D on bearing materials and side skirt coating this engine will be very promising and reliable. During the tear down the bearing spun and the material was all caught by the oil filer which was fantastic, keeping the whole engine very clean and healthy. Honestly if the bearings and side skirt coating get addressed which i wouldnt see it being very hard since its only two issues and lets be honest its probably a money thing, this engine will be a very successful and reliable motor. Nissan please put the extra effort into the next revision of this engine and address these two issues.
i do car video ?
This comment is worth reading....❤
"Hector is gonna be running three civics with vct engines"
Johnny Figueroa this would have more thumbs if people had good taste.
😂😂👌
Real talk 😂😂
He wouldn’t take out the VTECCCC
He has a whole stimulus check in vct upgrades you can't bet your pink slip jessy.
1:22 This is so awesome
Fix It Angel ，讚！
Very engineering
A lot of technology in one engine.
That won’t be reliable.
@@pattycarljackson why?
Luminous65 having Variable compression in one engine is going to put a lot of stress on that engine not to mention it’s a turbo and they do fail before the engine will fail and they can destroy the engine. On top of that it’s Nissan they aren’t the most reliable care company.
@@pattycarljackson ok but you can adjust boost to make engine really close to N/A on high CR or increase boost for low cr and high compression ratio is not always bad, Mazda make engine with compression ratio about 14:1 and this make their job right
And it is True about nissan
Luminous65 it’s Nissan I’d never trust any of their CVT’s, Automatics, or this new engine. Let’s wait a couple of years and see how well these engines actually hold up. People think because it’s new means it’s reliable and that is absolutely not the case.
Love it!
Variable Compression Ratio + Variable Valve Timing + Active Cylinder Management whould be epic
This is VC turbo, powerful engineering the better porformens is better the future, advice speed and technology. Nissan innovation that excites, distributed by courtesy garage.
This is actually a revolutionary design because even though there are added parts from the Compression ratio Actuator thing, You can see that the design made the engine run smooth enough by itself, that it doesn't need any balancer anymore. Plus, the crankshaft is offset, which allows the combustion stroke to be much more linear, where not only the Efficiency is upped, but also gives less stress on the piston and the crank. So, the lifetime could be possibly lengthened if the design is improved even further?
Well, there are 2 set of rods and a complicated balancer. It's complicate even sparing balancing shafts
VC-Turbo kicked in yo?
Read more
Lol new meme?
Lol
Lol
Yeah, fuck yeah
Vc-turbo paaaaaaaaaaaaa 🤣
Engineer have been struggling for decades to find a perfect solution for compression problem of high speed engines , here there have done it eventually .. awesome 💪🚗🚗
Nissan has done it again folks the new generation of turbo and engines
yay more moving parts! this is going to last forever!
What you are saying is the equivalent of being afraid that a crankshaft or connecting rod will break. It's like being afraid that one of the 2 crankshafts of an opposite piston engine will break. So why not take a 3-cylinder engine, the real problem with having more moving parts is that they do not hold, in fact, this engine will prevent the cylinders from turning into ovals and the connecting rods at the time of exploration will be exposed to less stress. in terms of the new parts because it's like being afraid of breaking a crankshaft
Yes, more points for failure. A turbo, direct injection non self-cleaning engine with a movable crankshaft spells trouble.
Nothing lasts forever idiot. Compression ratio is improved on a stock vehicle and you’re mad? HA!
Yes. Because this car is not for you who cannot afford it
@@riosena350 hey now that we're 3 years down the road and these are exploding left and right, how are you doing?
Nissan is the largest, most successful and reliable car in the world. I am a lover of Nissan Qashqai, and I hope that she will have it in the future
I just leased one of these and the change over is seamless. The Xtronic CVT in the 2020 Altima is years ahead of any other CVT I have owned.
how is it going? I hope it's reliable and no issues. Very interesting concept.
CVTs are not as strong as their geared cousins
Its a really good thing this engine produces it's peak at such a low rpm. You can see that this engine can run on a low fuel economy.
Proud Nissan owner. From Sr to rb love em all
even the leaf...or the micra...or the cube?
Shed MX my favorite Nissan sedan is the b13 add an sr20ve to that mix. Legend
dosnt really answer my question
Shed MX I love Nissan more than others, I love the culture, the history, the glory of motorsport with nismo, with such a great car and great machines. but, it doesnt say that I love that car which you said earlier, like honda they have terrible creation also, toyota has, mitsu has, every single damn car company has. so shut your mouth and sit down ! you dont really have to criticize other people interest so on their love in car or engines. so is my reply above answered your question ?
Hukukul Ibat just becuse i ask if he liked the bad creations, it does not mean that im critcizing his intrest. So dont jump to conclusions. And dont be rude
This is an amazing engine design that variable compression rate is not achieve solely by valve timing but actually varying the stroke. the no lateral force on down stroke is also achieved with the design. It's an expensive engine to make with more mechanical components.
Удивительно! Это действительно очень толковая концепция! Великолепно! Пара минусов - бо́льшая материалоёмкость - это бо́льшая масса двигателя. И бо́льшее количество элементов - снижение надёжности. Но с современными материалами это не проблема. Также понравилось, что кинематика такого кривошипно-шатунного механизма эффективнее (проход "верхней мёртвой точки"), чем классического. Молодцы!
Impressive ! Nissans computer graphics animation skills is unbelievably AWESOME.
I wonder which one would self destruct first the engine or transmission
Painful accuracy
Clayson Webster if dimensioned right no one, but thats not the aim of todays car manufacturers.
It's sad to say the balance shafts are there for high rpm balance as well and Nissan went and f'd it up trying to be efficient on a turbo engine....trying to physically move the crank upward when off throttle leaning out the motor...how would this take affect in a cvt trans vehicle whilst moving 15mph and then proceeding to punch it then let off after reaching top of the rpm band while in sport leaving it in "1st"...
Clayson Webster not possible the don’t design engines to explode that way..... you think they will just explode when something like that is new and they only build it to explode.... no they don’t......
Too much parts to fail prefer mazda skyactive
But Shinichi Kiga, Nissan's chief powertrain engineer, told me the VC-Turbo engine creates less friction than a regular engine. The secret: Nissan engineers moved the crankshaft out from being directly underneath the pistons' bores and offset it about 15 degrees. That, in combination with the multilink assembly, eliminates the usual side forces that act on a piston as it travels in the cylinder. In other words, the piston is pushed and pulled straight and up down in each cylinder.
Did you mean: Shinichi Koga
This in an RB26 😍 mixed with Skyactive X principes plus Camtronic from Mercedes and we have a high power super eficient engine with an awesome Sound
As a fan of ev, I cannot argue that gas engines are a marble of engineering and an important step in human history
The federal entity is opening an investigation involving over 450,000 Nissan Rogue, Nissan Altima, and Infiniti QX50 models, which use those two engines. According to the NHTSA, owners are reporting knocking sounds, loss of power, metal bits in their oil pans, and even total failures. Nissan has made changes to the engines' main bearings and L-links since they've been on sale to address potential engine damage; however, a recall hasn't been issued yet.
VC-Turbo engine + CVT?!
What is that, 50 mpg city, 100 mpg highway?!
Sounds great!
Unfortunately, I still want my V8 after this 2015 altima 3.5SL finally dies on me... whenever that is considering it's clockwork maintenance and overkill with the fluid flushes for me!
392 V8 are going away next year, but not only do I like no car payments, i'm 100% sure I can get this altima of mine to 200,000 miles!
Ah what to do!
Very nice presentation of the concept. Thanks nissan.
This engine is truly impressive.
wow, kudos to the engineers and the executives since the IC engines days are numbered.
Nope.electric cars don't have future.
Your demonstration is compatible with old trains drive system. Indeed , it’s old, but, extremely, correct. ✅
Wouldn't be a Atkinson/ Miller Cycle with turbo-support be much easier than this highly complex masterpiece of engineering? Greetings
Definitely. This thing will be a big problem for Nissan, it's too complicated.
What ground breaking technology. In theory and hopefully in practicality.
I guess the all new 2019 Nissan Altima use the Variabel Compression Ratio Turbo engine, in short, VC Turbo engine
Nissan knows what they are doing if they can build the Skyline GTR series they certainly know how to build a new motor with new technology
Looks cool, hopefully it holds up for a long time but I'm sure they would have tested a few for longitivty of the engine.
More moving part- more room for failure
@@anpham8107 yeah, it's always factor
OMG Nissan is Awesome 🔥🔥
I wish that JDM cars should get the fame once again. 😍😍😍
I've seen a tractor engine from the maybe 60s designed to run on any available fuel, so it had a large screw in the head. Turn it in, it increases compression. And that was it.
Trazendo essa tecnologia para os carros flex até mesmo aspirado seria um sucesso, uma maior taxa de compressão para o etanol, uma menor para gasolina, até mesmo uma alta taxa para o gnv... Muito promissora essa tecnologia.
Now imagine this with Mazda sky active tech🧐
And add camless valves to boot.
Mazda has a fexed compression ratio, in the case of Nissan, the compression ratio is variable!
imagine the name of that shit
this technology is for turbocharged engines. mazda's skyactiv engines are naturally aspirated and they does not require variable compression.
@ffhgu 07Nissan's Variable compression engine is a wonderful design it will adjust to good or poor fuel quality by automatically adjusting the fuel ratio now try that in some other engines which comes with a specific grade fuel rating.
Nissan and Ford, both going down the crapper, and FAST.
When these start crapping out I'll be waiting for the VQ to make a comeback 😎😎😎
UGLY-DUCKLING-ROASTS
VR>VQ
yes sir. 100% agree. the VQ is really hands down one of Nissans greatest acheivements. the power, reliability and ease of maintenance has been totally underrated over its lifetime.
@@AlienPizza38 without the VQ there would be no VR or VHR .... the VQ series is Grand Daddy Eastwood himself, for all of nissan's modern V6's
mom lets me drive this (2019 altima vcturbo 2.0L) to go pick up food and boy that little engine and that turbo kicks in . its pretty good
Being a newish concept brought to the market by Nissan, this will inevitably explode spectacularly at depressingly frequent intervals, be picked up by no other manufacturer, and quietly get dropped in a few years time. Enjoy!
R Soul Pretty much lol. The Japanese always did this kinda thing and when they do get it right, they get it right pretty well.
Calculator yeah, successful stuff like Honda 4 wheel steering, Yamaha 5 valves per cylinder, or anything made by Daihatsu. Apologies to all you Daihatsu fans btw.
They copied infinity's idea....
Olivier Haman yes, I am sure the corporate lawyers at the stand alone and totally independent manufacturer ‘infinity’ will be immersed in volumes of litigation regarding infringement of their steadfastly original and copyrighted design, that in no way is the work of a parent company. Noob.
R Soul You have no chill lmao
Like other GDI engines, direct injection while in high compression mode would screw up backs of the valves as happen in GDI engines (such as those of KIA).
In this IT age, I thought there was no room for innovation through mechanisms. This engine encourages me.
IT still needs to manipulate this design
Right.
All that new development just for 26 mpg.
Combustion Engine tech has reached its peak. Any new improvement will be very small but will require huge amount of resources to achieve.
Battery Storage technology is the growing field and is the future.
Stunning imagery
This seems very interesting but I feel its the Cadillac v8-6/4 of its time. Not going to take off very well, overly complicated for our time but will spawn many ideas for future engines
First SR Neo VVL destroyed VTEC
Now this
CANT WAIT
日産の開発力と横浜工場の製造技術力。本質的な技術革新で面白い車を世の中へ。
Nissan is getting so close to there huge comeback
Can't wait for Serena Turbo
I guess I don’t understand, the first thing I noticed is that for a stroke of the piston you are moving the output shaft 90° where in a conventional engine for a single stroke of the piston removing the output or the crankshaft 180°. Somehow the extra energy that is gained by variable compression ratio Hass to make up for this and more
Mechanics are going to make a FORTUNE off this nightmare!
Nissan siempre dejando a la competencia como basura 😍💙
Asi. Hermano como hermosa basura. Pero QX50 es muy caliente!
Why is NHITSA looking into having Nissan recall the VC turbo engines? My 2022 (only 10K miles) runs just fine, lots of power. I sure don't want my engine replaced via a recall, it'll never be the same.
Nissan can you make a V6 Variable Compression Turbo For the Pathfinder and that thing will fly
...and then they hooked it up to a CVT. (smh)
Gordon Reiher exactly!!!! like get outta here with that cvt shit
They can't as they aim to have high performance with this engine and the CVT aim to have more fuel economy
i just want to say it 😂😂
im with you on that but you are aware that Toyota, Honda , VW, Audi, and more have CVT now. and alot of Hondas CVT are having major issues specially toyota and there hybrids and corollas. NIssan was one of the first to bring it out yea.
@@robacejr Not sure about your common CVT used in most other popular car manufacturer's products because the Infiniti QX AWD Turbo's all use a rear wheel transmission double clutch drive system - not the usual competitions CVT at all, as you suggest? Also Infinity guarantee their great products with one of the very best 72 month warranties too? I think y'all need to study the Infinity QX AWD VC-T series a bit more before making fools of yourselves in public. Infinity are making great AWD SUV products now. Anyway even the Nissan rogues cvt transmissions you seem to be hung up on, are reliably tested to 200,000 + miles just the same as Toyota Mazda Honda and all the other cheap popular cars. Except Nissan have five times the experience at it.
My mum would love a car like this
what we need its a video about Nissan Skyline R34 Z-Tune, and history of Skyline
It seems as though the variable compression is used in this case to increase reliabilityin high boost mode. This is great on paper but in practice it leads to a very narrow power band and low efficiency: cite: brm h16/v16. I would think the variable compression would be better set to low for startup and not much else in this case. I would like to see more data on how it is used in high power modes of operation, and that it does indeed actively change compression under high demand to limit the narrow power band found in low compression high boost engines. Until then i will still have little confidence in this and similar technologies.
Thanks
thats the engine what i dream long ago
My 1st Japanese Car was a 1976 Datsun B-210 Hatchback 4-speed
Круто! Приятно знать что мы куда то всё таки двигаемся в вопросах двигателестроения. С другой стороны, увеличение массы, поднятие центра тяжести и влияние на конечную стоимость, думаю не позволят реализовать эту технологию в таком виде.
VC- turbo is too good 👌🏼👌🏼👌🏼👌🏼👌🏼👌🏼
Parts for this motor is too expensive 🤑
Nissan the best petrol engines !
Meanwhile, here in America, as we continue to redesign LS and Hemi.
Most people on here are ignorant. These motors are really well designed and reliable with good solid tech behind it. Even though infiniti really used the most potential out of this motor it’s a good solid option for people who want a nice car with reliability. If your car isn’t reliable it’s probably because it’s clapped and never well maintenanced
Wow amazing.. 1 engine, can do efficien, or power.. awesome
It is an ART.
Variable valve from honda + Variable Comopretion from nissan = VVVTECC
The best tech in the entire world 😂😂
lol
dont forget mazdas tech as well
skytech vvvtecc kicked in yo
Just dream, no more for production, whereas in the world no need talk just action
А сколько будет стоить ремонт такого двигла? И его уже сильно не раскрутить, много деталей падает КПД...
Nik Lav где у вас КПД то упадёт? На трении? Не смешите. На массе вращающихся деталей? Так тут плечо не большое. Да и балансирные валы убрали
Мне интересно, сколько будет стоить детали, на эту
ШАЙТАН-МАШИНУ
i think the more moving parts inertia less lifetime , more complicated
but the advantage is more controllable for better dynamic performance
Im a longtime Nissan owner. presently a 2016 Maxima and a F150 (not Nissan).
The new altima brings the variable compression engine to the masses. I'm Concerned about long term reliability.
Can this work if they create diesel version??
Oh my god this is gonna be a pain in the ass to fix.
NEED this in my s14
Some Dude DONT. it's better to stick with the traditional
jajajaj YES!
welcome on EURO6 for gasoline engine :'( manufacturers need to use these things to get rid of the GPF particulate filter
As a mechanic I love the video, very impressive, but spending all that time in developing a combustion engine is wasted. The electric motor is still much better.
theory816 nope, ev’s don’t have a good engine note
Electric cars are a novelty. Won't ever be a real thing.
Can’t agree with this but good take. Not to mention most EVs don’t even have the range of a modern four cylinder still which is honestly sad.
Electric is a fad, plus there will never be the electric infrastructure to support everyone charging their cars and large haul trucks. California barely has the infrastructure to run everyone’s AC with out brown outs, how do you charge cars at the same time. My outlander get 42 miles per gallon. You have any idea how far I can drive on the cost of an electric car battery? Battery cars are a joke. The Phev from Mitsubishi is the electric future. Internal combustion electric , like a locomotive drivetrain. Most efficient.
these might be our SR20's in 10-20yrs time..
Way to go Nissan with the innovation :) #makeNissanGreatAgain #makeMitsubishiGreatAgain #RenaultNissanMitsubishi Alliance
I dont know if they use the same engines and technology on 2024 Altimas but I rented one 2 days ago from Chicago then traveled to Seattle in 2 days. Dodge Charger was the car they gave me but I thought it would be pricy for me to drive 2K miles then I asked for something with better fuel consumption, then they offered me 2024 Nissan Altima SV. TBH I never liked Nissans at all thats why I wasn't very happy with they second offer but I knew it will save me bucks on gas so I took it.
Once I hit the road I started loving it with every second, amazing things that impressed me were - insulation, low RPM on high speeds, smooth ride, design. RPM never went over 2K at 80MPH, 2.5K at 90MPH and 3K at 100MPH. Sometimes even at 100MPH the RPM would fall down to 2.5K when on straight long road. My average speed was 90MPH thats because you dont feel the speed at all, I felt like I was in one of those Japanese bullet trains - FAST and SILENT. No engine sounds, no asphalt humming, no wind whistles, bumps and small potholes felt like nothing. The ride was smooth, stable, comfy, and fast. I love Nissan Altima now, I wanna change my 2025 Corolla SE Nightshade now.
200$ for 87 regular gas for the whole trip.
I felt the innovation the engineers worked on. Great job Nissan.
Isn't turbocharging already a variable compression?
Well, turbo adds boost and increases the amount of air you can push in the cylinder, so yeah, it adds compression (that's why turbocharged engines usually have lower compression ratios compared to naturally aspirated engines, so they don't knock), but at low loads (cruising for example), the boost provided by the turbo isn't so high, you could easily increase the engine's efficiency by raising the compression ratio... This is exactly what is done here.
To recap: higher compression ratios = Better efficiency
High RPM/load on the engine = high boost from the turbo -> Engine's compression ratio is lowered to avoid knocking while delivering high power output
Low RPM/load on the engine = low boost from the turbo -> You can get away with increased compression ratio to increase efficiency without knocking.
Correct me if I'm wrong, but as you mentioned above you should get same or similar results/effect by using a variable turbo geometry?
Or can a VTG not adjust that much?
I'd really like to now more about potential benefits of this system, because the engine has to carry a significant higher rotationally and translationally mass.
Anyone knows about the engine size?
Well, there are several notions to take into account, and compression ratio is only one of them.
The main problem when it comes to turbochargers and compression ratios in a gasoline engine is to not exceed a certain internal cylinder pressure when the piston reaches its top dead center. If you exceed a set pressure, you will end up with an engine "knocking".
"Knocking" is a phenomenon where the air/fuel mixture combusts all at once in an uncontrolled manner, and it usually appears before the piston can receive its power stroke, before reaching top-dead center. Not only do you loose power since the burnt air/fuel mixture pushes down on the piston while it is still going "up", it also is very destructive and must be avoided at all costs.
A turbocharger, being variable geometry or not, cannot provide its full boost at any RPM and any throttle application... It needs exhaust gases to spool up and incease the intake manifold pressure. To be able to deliver its full boost, you need to open your throttle wide and/or reach a certain engine RPM so your exhaust gases keep it spooling up.
As I stated before, compression ratios for turbocharged engines are lower than naturally aspirated engines, simply because you have to take into account the maximum cylinder pressure your turbo can provide at full boost... But that also means that, at lower loads (low rpm and/or low throttle application), when your turbo isn't providing its max boost, you are far from reaching your maximum cylinder pressure before knocking... That basically means that your engine isn't as efficient as it could be.
With a variable compression ratio, you can always have that internal cylinder pressure as close as possible to the maximum, regardless of throttle application and turbo intake pressure.
Your turbo being a variable geometry only makes it spool faster, or sooner at lower RPM and provide a little more boost than a normal turbo at low/medium RPMs, but that's all.
As for knocking, to be more specific, there are ways to prevent it or make it happen at higher cylinder pressures: gasoline with higher grades (octane) makes knocking happen at higher pressures, therefore, you can have higher compression ratios which translates into more specific power and a more efficient engine. You can also have a richer air/fuel mixture, tweak the valves timing/opening.
That's why there is sequential turbos smaller turbo to spool at low rpm.
That does not change the fact that, at cruising speed, your turbo can't deliver its maximum boost... The problem with the turbo, whatever technology it is using or how tuned it is, is that its boost is dependant on your driving conditions (RPM and throttle application).
As I stated before, at cruise speed, your turbo can't deliver its full boost... Therefore, with a fixed compression ratio (which is dependant on your piston distance travel and how "close" it gets to the valves) your cylinder pressure isn't optimal...
Since your turbo pressure is stabilised and it can't deliver more boost unless you put your foot down on the throttle, the only way to increase cylinder pressure and reach its optimal range is by increasing the compression ratio.
Look at the video, it shows exactly that:
- when you put your foot down, the engine gains RPM, the engine exhaust gas production is increased, which in turns spools up the turbo, which increases the intake pressure => The compression ratio is lowered beacause in this driving condition (with the turbo at full boost), the internal cylinder pressure is reached easily.
- when ou cruise, the RPM is lower, exhaust gases production is lowered, and the turbo spins slower => intake pressure is reduced. Since the intake pressure is decreased, the internal cylinder pressure is lower at fixed compression ratio. The compression ratio is then increased to maintain the cylinder pressure in its optimal range.
Don't conflate cylinder pressure and compression ratio, they may be linked, but they are two seperate parameters.
And let’s put all this amazing revolutionary technology in an engine and mate it to a cvt😢
VC Turbocharger will fit into any Nissan future models such as Nissan Z, Nissan Patrol and the Nissan Skyline R36.
If anyone from Nissan is monitoring, please explain what you have done to mitigate problems with intake valve fouling, so common with some GDI engines.
They added 4 more injectors that are not directly in the cylinder.
How did you manage to eliminate the piston's lateral tension to the cylinder? 😮😮😮
Verry nice idea ! Gasolin and diesel running
Sweet even more pieces to pop out and say hello
Wait it's simply a variable shaft.... Genius idea, well a lot of other complicated things. Way to go Nissan's employees.
Que loucura o moto aumenta e diminuir seu curso e pressão. Deve ser muito bom nunca tinha visto algo assim
I wonder if with power upgrades, will it influence the compression ratio by somewhat over powering that electric motor (somewhat, not entirely).
But u have to admit, this is a pretty slick design
Nissan, is this different from the supercharged super high compression motor you are working on?
I wonder how exactly does it reduce the crankshaft vibration
Does it just have two CR settings or does it move anywhere between the 8 and 10 CR? if u could tune it to stay at a certain compression ratio and turn up the boost might be a fun engine/car
Insanely wonderful.
I wish motorcycle would have this technology
That’s all good and all till something breaks
I love NISSAN 😢😢
Nice, high compresi for low speed, and low compresi for high speed