Oh, a Turbo extracts the exhaust gasses does it? Does anyone on Discovery have any idea about these things, jeez, I know it's only a TV programme but please get it right!
Well, combustion does occur in the cylinder, perhaps you're confusing it with 'ignition', which kinda happens but it's ignition due to the high temperature within the cylinder and not a spark, but there are some corking errors in these programmes.
***** Yeah my mistake, I mean't ignition. However it still stands that diesel does not need a specific air/fuel mix to make power. It requires it to make power cleanly.
You diesel haters are something else again. The Audi turbo diesels win races and use identical suppliers used by Benz and BMW. THE FACTS ARE that the use of genuine German synthetic oils keep them all running to 500k miles. They all use piston, rod, chain and tensioners, and injection from identical suppliers and that there are more diesel powered cars in Europe than gas ones. Diesels do not suck. They outlast gas powered engines even though they have very high compression ratios. BMW BENZ and A
The turbocharger does NOT "draw out the exhaust"! It actually IMPEDES the flow of exhaust out of the engine but captures the energy required to drive the impeller which forces air into the engine.. More power is gained by the additional air than is required to power the impeller, so a net gain in power results.
Audi's TDI Engines are amazing for example the 6.0L TDI V12 from the Q7 It makes 500hp and 738 lb/ft of torque , and consumes 9l/100km!! More than 20mpg!
+1975 First On Race Day Capri 3.0 Ghia more amazing is the price tag back then around $ 2 million more amazingly the performance of that engine on the Q7 is comparable to the BMW M5 V10... oh god if I were that filthy rich!
+baxtar1963 Their CEOs make less because auto manufacturing is a low profit business, where the high margins are in spare parts and the cars are sold with profit margins that would kill most businesses. Also, in Europe we drive cars for 10, 20 years because we can't afford to buy new ones, and because of taxes cars here are more expensive than in America. No shit out CEOs make less. We can barely afford to buy their products.
The engine uses little fuel per mile, that's already greener without any emission software or control systems. This is an awesome engine hands down, I would like one without the "fixed" software. There is a dark downside to owning a diesel. Due to the quality of metals required, the more precise machining, the ultra high pressure injection amongst other things, diesels are expensive to fix. If you are a person who neglects their vehicle regularly, stick with a gas engine. A diesel will treat you right, but it only returns the love you give it. Gas engines care a lot less about your love.
3:30 one turbine compresses air entering the intake manifold, the other DRAWS OUT THE HOT EXHAUST and sends it out the cars exhaust pipe...dafuck! turbochargers ARE DRIVEN by hot exhaust gases, they dont send them out of exhaust pipe. Cars without turbo can get rid of exhaust gases too :)
It must be a bastard when the various cam and drive chains get worn and rattly to replace them! Definitely an engine out job requiring god knows how many special locking and adjusting tools! No only would you have to replace the chains,but also all the chain tensioner blades,idler gears and any of the sprockets should they show signs of wear and damage.What a nightmare! I suppose Audi have designed it so that these components last no longer than the projected life span of the vehicle.
At 0:58 I just love how during the cylinder honing process, the block spins around instead of the honing head which here stays fixed moving up down only lol :) It looks like a plasma coating process by the way...
They explained the turbo wrong. The exhast side turbine doesnt draw out exhast instead it is driven by the exhast and compresses air on the intake side.
Not so in this generation of Diesel. The multiple injections during the power stroke are monitored in real time via a pressure sensor in each glow plug assembly, the REAL secret to this generation. NOx emissions are greatly reduced by a dual pass EGR system, lowering combustion temperature and NOx. The exhaust of this engine is cleaner than a gasoline engine; the pipes are still silver on the INside after many thousands of miles.
I think if you just said cylinders, people would be capable of inferring that you meant the huge cylindrical holes in the block that were taking up most of the screen... I'm pretty sure there are animals capable of that much... Also, a turbocharger doesn't draw out the exhaust gases, it's powered by them... Get your basic facts right, literally 5 seconds of Googling would have told you that. Torque also tells you nothing about how much power an engine can produce, that's what horsepower tells you. Torque is instantaneous force. horsepower is energy output over time. If you have an engine that has 1HP and a million foot pounds of torque, it could spin a house around, but it couldn't do it very quickly.
I always said that until I bought my first turbo diesel a year ago. I FRICKIN' love it now. The torque is amazing, you accelerate on the motorway and it goes like a stabbed rat.
I'd still rather have a Diesel engine then a petrol engine different is Diesel more reliable more powerful and I'm still happy with my 3.0 v6 Diesel bugger global warming I don't care Just like vw 😀
. . . bravo the the trained/skilled mechanics that must preform a moderate to major repair on this engine while it remains in the vehicle , love & hate modern cars . . . just saying . anybody ? ever tried replacing a fuc'n little water by-pass hose that's situated 1.2" from the firewall on a front wheel drive platform car . love my chick , but hate her car when trying to save $ $ working on it . my Ole flat 4 VW laughs at me as I repair modern stuff parked near it . ha ha
I'm not 100% sure about the diesel, but I don't think they ever made a 5v per cylinder diesel engine. As for their petrol's, after they introduced the direct fuel injection in the FSI and TFSI engines, there's simply not enough room in the cylinder head for 5 valves any more. Not that there ever was any real indications on that 5 valves has any advantages over 4 valves.
In fact roboters are only dangerous for uneducated workers. You still need enough people for R&D, construction design, production engineering and so on. Servicing your car is also something a robot can't do.Only problem: you need to be well educated to do these jobs. All people who obviously can't do that can still clean the production hall for example ;-)
Putting it that way; yes, stuff will wear faster. Keep in mind though; if your wanting to "race" or drive aggressively, just get a "RS/S" Audi, they build those engines to withstand those extremes! As for the bolts, most German cars need specialty tools to even change certain fluids! ..thats a pain!
yes that was till 20 yrs ago , the new ones don't rust before 14 yrs of life. or even longer with some models. the only problem with some cheaper italian cars is that the seats and seat position aren't that comfy as the german ones
i note. My previous reaction was a reaction to a so called "expert" anyhow italian engines of nowdays are better than german, even Opel a german manifacturer uses fiat engines. suzuki preferred the fiat 1250cc jtdm2 instead of the dreicylinder vw 1.4tdi
How odd, the Discovery Channel ran this exact mini-doc as an episode of "How it's Made" but with a female narration.. They're even reading the same script!
italian diesels are the top tecnology of the world. thanks to italians you have a common rail tdi diesel or else wo would be stucked with ancient diesel tecnology without seeing your profile: you are a kraut or a brit
germans made this big complicated clockwork while italians made piezo electric high pressure injectors that work more precise and give more power. now germans use the piezo's to. anyhow that V6 was an awesome engine
i own an audi a4 1.9 tdi 2005 and vw sharan 1.9 tdi 2002, guess what buddy no problems what so ever, so again learn some shit or buy a car from this century and u will have no problems, peace
no go and check really audi doesn't own anything, they just own the patent to quattro and thats it, really not trying to be a smart ass or anything but everything is under volkswagen
These engines are designed to last; no need to rebuild unless the consumer themselves dont maintain the engine. At that point, they dont deserve the car in the first place.
Remember back in the day when people worked hard and didn't complain? ;) I spent enough time working in a unionized factory to know the tendencies of human 'robots'.
The description for the turbocharger is wrong. The exhaust turbine doesn't draw out anything - it's spun by the exhaust, and drives the intake turbine.
Honestly you thought that's how I think it works and when did a windmill which doesn't operate on the same principles come into this? No it uses the physics of thermodynamics by compressing the hot exhaust through the volute to make it hotter. The area past the volute is at a lower pressure and temperature and as physics shows us heat goes toward cold and high pressure goes toward low pressure until the difference is balanced. Look at jet engines, ramjet, scramjet and Brayton cycle similarity.
Think about it, newtons laws of thermodynamics tell us about the conservation of energy. We cannot create energy nor destroy it only convert it, energy losses are usually in the form of heat escaping. If turbos really operated on the pressure of the exhaust then compound turbocharging would be pointless and counterproductive as the force would push back on the piston during the exhaust stroke. Of course there's miniscule resistance, but the turbo really gets energy from the heat of exhaust.
The exhaust side of a turbo DOES produce backpressure which IN ITSELF would reduce an engine's power. However there is a NET GAIN in power from the increased intake air forced into the engine by the impeller on the intake side of the turbocharger. Yes I am fully aware of the mechanical dirve of the compound turbos being used on a few modern heavy trucks. Mechanical drive from compound turbos were also used on some airplanes in WWII
Excuse got turbine and impeller backwards. Might as well also note that what I meant by series turbocharging was to have the air compressed twice by two turbos. The advantage of turbo is of course more power without wasting energy. Superchargers are more responsive as they don't need to spool up to speed and you don't have to worry about overspeed and loss of lubrication to a spinning turbo after heavy engine load and immediate shutdown.
Actually the turbo uses the waste heat in the exhaust to compress the air without robbing the engine of power. This is unlike a supercharger which would be gear or belt driven and thus takes power from the crankshaft. Believe me or don't in recent years more commercial trucks have compound turbo charging (not talking about series turbocharging) where a second turbo has the impeller drive a gear on the geartrain to add power to the crankshaft instead of driving a turbine to compress air.
Gear case would need to be constructed on the side of the engine adding a bit of weight to house the idler gears and main gears for the crank and camshafts. Also the size of the gears would require the engine to be a little bit longer than it is currently to properly house the gears in the gear case. Not impossible its just they would have to redesign the engine to make it work with the current size constraints they have with their cars.
continuing..... 5 valve engines have smaller valves that enable higher revs - an advantage negated by better, lighter materials and stiffer springs Bottom line - The marginal increase in volumetric efficiency is probably not worth the increase in cost and complexity. Similar improvements in breathing can possibly be made in other areas of design of a 4 valve engine without the cost increase of a 5 valve design
Diesels are pretty efficient but don't believe the quoted mpg, especially when we're talking about NEDC mpg because manufacturers have become experts at cheating the test to get amazing fuel economy and emissions that aren't anywhere near real world numbers. You'd be lucky to get more than 20mpg from a V10 TDI.
And for passenger cars. A turbodiesel is really really nice to drive as they use to have incredible low-down torque (here in Europe most prefer to use manual gearboxes so the engine characteristics do matter), and they consume noticeably less too. At least in European fuel prices, your wallet will thank you if your car runs on diesel.
I just amazed on the amount of stupid Hex bolts used on that engine... Its pretty obvious VW or Germans in General don't give a crap about rebuilding those engines in the future... Anyone that had a Head Hex Stripped on a careful maintained VW/AUDI car will understand..
In the old days before common rail injection technologies, having more valves was the best way to achieve best fuel dispersion in the zylinder. Now since that is achieved by high pressure injection, regulated by nozzle geometry and ecu chips, having 3 intake valves became obsolete.
new engines are all turbo. (petrol and gas both) with a turbo engine you dont need 5valves per cylinder. the turbo and injection make all the torque and hp. you can safe the enormous engineering and fabrication-effort which are required in making 5valves per cylinder heads.
This turbocharger seems like GTB1756VK which has 56 mm on exducer (inducer 41,5mm), but on 3,0TDI are usually installed GTB2260VK which has 44,5/60 (inducer/exducer) ... and these spin really 200k RPM. We use these turbochargers on 1,9TDI and these spins about 250k RPM.
less moving parts generally means more reliable as in there is less things to break. chances they abandoned it was because there was no longer a need to, maybe valve technology became more efficient making the use of 5 valves worthless.
If I remember right, Yamaha used it in earlier r1 models but then stopped making them because the intake port walls needed to be so thin, and the power gain is minimal compared to well designed 4-valve design :) It's also cheaper to make and maintain.
horrible radial run-out when the cylinders walls were honed... not too impressive. p.s.: as of june 13 2012, diesel is considered to be as carcinogenic as asbestos, so good luck with THAT engine p.s.2: 4.2 V8 FSI is the only current engine audi made well.
Think about the children!!! If that manual lift got replaced with an hydraulic, or electric lift His left leg would be out of a job, he would go on Unemployment, Then turn to drugs and end up living in a Box the lift came in.....circle of life...Hahahaha
Holy crap. Ya know I just finished rebuilding my 95 Z28 with an LT1 motor. I was like, dang engines have come a long way since the late 70's. Then I see this and thank god I only got ONE timing chain and ONE pair of valves per cylinder to deal with LOL.
they don´t test every engine, no. That would have been extremely time consuming and expensive. The test you saw here is tests that is done to only some cars in the production. How often these tests are done depends on car company and so on.
Do they really put each individual engine into a "test vehicle" - or do they do that just once for the first production car, to get the emission specs, then just assemble engines into their actual cars for the next few thousand units?
When they do this, audi is telling them what to say. The last thing they want ignorant people to hear is "it sucks power away" because that's all that would stick, when the turbo in concept does the opposite.
Well I would like to know that I have quality over speed lol they seem to take pride in their work. Look at GM and the way they asymble. They don't seem to last as long. Not dissing, I drive a 02 s10 lol just saying
Well yes and no,there is common rail injection which improves the poweroutput drastic by injecting diesel multiple times which each stroke but as you said,we won't see a Ferrari running on diesel any time soon.
I know diesel has come along way, even in the last 15 years, but most diesels rely on a turbo as most petrols don't. If the modern diesel had no turbo, I'm sure they would be pretty useless compared to petrol engines.
Lamborghinni IS under the Audi company, I think Bentley is too. Which is then under VW. Doesn't the Porsche family still have lots of VW ownership, and VW trying to get it all? It's just a family business.
I love the RS cars, A buddy of mine has an RS4 and indeed its fast enough for any track day but TBH I´ll take a BMW "M" car any day before an Audi RS... Especially the M3 E92 (Drools)...
It seems to me that you didn't understand the benefits of using more valves per cylinder... 1. You have more intake area surface 2. It is lighter and able to stand higher revs
a turbocharger both compressing the intake air and also drawing out the exhaust gas and sending it out the exhaust system. i would really like to have a turbocharger that can do that.
I just wish that VW group would use gears for the camshafts not chains and sprockets, they could really increase the power of their engines if they chose to use gears not chains.
I think they mean 30% better fuel economy. It may only be 7% more efficient but diesel stores more energy per litre which means you need to burn less for the same energy output.
and (sorry, forgot to write this in first response) I also consider the european version of honda accord to be the best value on the new car market right now
1.) Put a turbo in an oven and heat it to 1.300F degrees and watch it spin. 2.) Did you ever see a windmill spinning on a hot day when there was no wind?
back then you need thousands of people to maintain a farm, now is 10 people with machines, I'd say we go back to manually operate farms to get MORE JOBS!
![[Full Episode] The Restaurant War Thailand ศึกพ่อค้าซ่าแม่ค้าแซ่บ Episode 2 | 29 ก.ย. 67](http://i.ytimg.com/vi/r3lfLNH6Ke4/mqdefault.jpg)
last step: Install the ECU that tricks smog
how its made is so addictive
Oh, a Turbo extracts the exhaust gasses does it? Does anyone on Discovery have any idea about these things, jeez, I know it's only a TV programme but please get it right!
yes
tperr63
A turbo is driven by the exhaust.
They also keep referring to "combustion" which doesn't happen with a diesel. Diesel's work on compression.
Well, combustion does occur in the cylinder, perhaps you're confusing it with 'ignition', which kinda happens but it's ignition due to the high temperature within the cylinder and not a spark, but there are some corking errors in these programmes.
***** Yeah my mistake, I mean't ignition. However it still stands that diesel does not need a specific air/fuel mix to make power. It requires it to make power cleanly.
You diesel haters are something else again. The Audi turbo diesels win races and use identical suppliers used by Benz and BMW. THE FACTS ARE that the use of genuine German synthetic oils keep them all running to 500k miles. They all use piston, rod, chain and tensioners, and injection from identical suppliers and that there are more diesel powered cars in Europe than gas ones. Diesels do not suck. They outlast gas powered engines even though they have very high compression ratios. BMW BENZ and A
The turbocharger does NOT "draw out the exhaust"! It actually IMPEDES the flow of exhaust out of the engine but captures the energy required to drive the impeller which forces air into the engine.. More power is gained by the additional air than is required to power the impeller, so a net gain in power results.
Audi's TDI Engines are amazing for example the 6.0L TDI V12 from the Q7 It makes 500hp and 738 lb/ft of torque , and consumes 9l/100km!! More than 20mpg!
+1975 First On Race Day Capri 3.0 Ghia more amazing is the price tag back then around $ 2 million more amazingly the performance of that engine on the Q7 is comparable to the BMW M5 V10... oh god if I were that filthy rich!
These workers make a living wage and their CEO makes substantially less than american workers. America has a lot to learn from Europe.
+baxtar1963 Their CEOs make less because auto manufacturing is a low profit business, where the high margins are in spare parts and the cars are sold with profit margins that would kill most businesses.
Also, in Europe we drive cars for 10, 20 years because we can't afford to buy new ones, and because of taxes cars here are more expensive than in America.
No shit out CEOs make less. We can barely afford to buy their products.
The engine uses little fuel per mile, that's already greener without any emission software or control systems. This is an awesome engine hands down, I would like one without the "fixed" software. There is a dark downside to owning a diesel. Due to the quality of metals required, the more precise machining, the ultra high pressure injection amongst other things, diesels are expensive to fix. If you are a person who neglects their vehicle regularly, stick with a gas engine. A diesel will treat you right, but it only returns the love you give it. Gas engines care a lot less about your love.
3:30 one turbine compresses air entering the intake manifold, the other DRAWS OUT THE HOT EXHAUST and sends it out the cars exhaust pipe...dafuck! turbochargers ARE DRIVEN by hot exhaust gases, they dont send them out of exhaust pipe. Cars without turbo can get rid of exhaust gases too :)
Nice vid thank you
Turbocharged engines DO lose power at high altitudes, thou not as much as N/A engines.
It must be a bastard when the various cam and drive chains get worn and rattly to replace them! Definitely an engine out job requiring god knows how many special locking and adjusting tools! No only would you have to replace the chains,but also all the chain tensioner blades,idler gears and any of the sprockets should they show signs of wear and damage.What a nightmare! I suppose Audi have designed it so that these components last no longer than the projected life span of the vehicle.
At 0:58 I just love how during the cylinder honing process, the block spins around instead of the honing head which here stays fixed moving up down only lol :)
It looks like a plasma coating process by the way...
They explained the turbo wrong. The exhast side turbine doesnt draw out exhast instead it is driven by the exhast and compresses air on the intake side.
Not so in this generation of Diesel. The multiple injections during the power stroke are monitored in real time via a pressure sensor in each glow plug assembly, the REAL secret to this generation. NOx emissions are greatly reduced by a dual pass EGR system, lowering combustion temperature and NOx. The exhaust of this engine is cleaner than a gasoline engine; the pipes are still silver on the INside after many thousands of miles.
Today's diesels are as clean as gasoline engines ............🤔🤔🤔
German cars are the best as common luxury !
very nice video, I like Audi items
I think if you just said cylinders, people would be capable of inferring that you meant the huge cylindrical holes in the block that were taking up most of the screen... I'm pretty sure there are animals capable of that much...
Also, a turbocharger doesn't draw out the exhaust gases, it's powered by them... Get your basic facts right, literally 5 seconds of Googling would have told you that.
Torque also tells you nothing about how much power an engine can produce, that's what horsepower tells you. Torque is instantaneous force. horsepower is energy output over time.
If you have an engine that has 1HP and a million foot pounds of torque, it could spin a house around, but it couldn't do it very quickly.
Did I see no head gasket or am I blind?
We love our V8 2003 allroad, thanks Audi for an amazing vehicle.
I was actually looking for how it's make, not assembled. But, not bad.
Where's the part where they lie to the regulators about the efficiency per gallon. :)
I always said that until I bought my first turbo diesel a year ago. I FRICKIN' love it now. The torque is amazing, you accelerate on the motorway and it goes like a stabbed rat.
Too bad they didn't show how Audi cheated on the diesel emmision control system.
Perpetual motion. YAY! :D
I'd still rather have a Diesel engine then a petrol engine different is Diesel more reliable more powerful and I'm still happy with my 3.0 v6 Diesel bugger global warming I don't care Just like vw 😀
Audi TDI - How it's made: You take car, you take engine, you bake them for 20 minutes and you have an Audi TDI.
. . . bravo the the trained/skilled mechanics that must preform a moderate to major repair on this engine while it remains in the vehicle , love & hate modern cars . . . just saying . anybody ? ever tried replacing a fuc'n little water by-pass hose that's situated 1.2" from the firewall on a front wheel drive platform car . love my chick , but hate her car when trying to save $ $ working on it . my Ole flat 4 VW laughs at me as I repair modern stuff parked near it . ha ha
I'm not 100% sure about the diesel, but I don't think they ever made a 5v per cylinder diesel engine. As for their petrol's, after they introduced the direct fuel injection in the FSI and TFSI engines, there's simply not enough room in the cylinder head for 5 valves any more. Not that there ever was any real indications on that 5 valves has any advantages over 4 valves.
In fact roboters are only dangerous for uneducated workers. You still need enough people for R&D, construction design, production engineering and so on. Servicing your car is also something a robot can't do.Only problem: you need to be well educated to do these jobs. All people who obviously can't do that can still clean the production hall for example ;-)
Putting it that way; yes, stuff will wear faster. Keep in mind though; if your wanting to "race" or drive aggressively, just get a "RS/S" Audi, they build those engines to withstand those extremes! As for the bolts, most German cars need specialty tools to even change certain fluids! ..thats a pain!
Clean as gas, lol! This is too funny! Now they are switching to something really clean: ELECTRIC
yes that was till 20 yrs ago , the new ones don't rust before 14 yrs of life.
or even longer with some models.
the only problem with some cheaper italian cars is that the seats and seat position aren't that comfy as the german ones
i note.
My previous reaction was a reaction to a so called "expert"
anyhow italian engines of nowdays are better than german, even Opel a german manifacturer uses fiat engines.
suzuki preferred the fiat 1250cc jtdm2 instead of the dreicylinder vw 1.4tdi
How odd, the Discovery Channel ran this exact mini-doc as an episode of "How it's Made" but with a female narration.. They're even reading the same script!
italian diesels are the top tecnology of the world.
thanks to italians you have a common rail tdi diesel
or else wo would be stucked with ancient diesel tecnology
without seeing your profile: you are a kraut or a brit
germans made this big complicated clockwork while italians made piezo electric high pressure injectors that work more precise and give more power. now germans use the piezo's to.
anyhow that V6 was an awesome engine
i own an audi a4 1.9 tdi 2005 and vw sharan 1.9 tdi 2002, guess what buddy no problems what so ever, so again learn some shit or buy a car from this century and u will have no problems, peace
no go and check really audi doesn't own anything, they just own the patent to quattro and thats it, really not trying to be a smart ass or anything but everything is under volkswagen
These engines are designed to last; no need to rebuild unless the consumer themselves dont maintain the engine. At that point, they dont deserve the car in the first place.
Remember back in the day when people worked hard and didn't complain? ;) I spent enough time working in a unionized factory to know the tendencies of human 'robots'.
The description for the turbocharger is wrong. The exhaust turbine doesn't draw out anything - it's spun by the exhaust, and drives the intake turbine.
I swear the chain drive for the overhead cams has got to be the most convoluted way of doing it. Silly germans always over-engineering things.
Honestly you thought that's how I think it works and when did a windmill which doesn't operate on the same principles come into this? No it uses the physics of thermodynamics by compressing the hot exhaust through the volute to make it hotter. The area past the volute is at a lower pressure and temperature and as physics shows us heat goes toward cold and high pressure goes toward low pressure until the difference is balanced. Look at jet engines, ramjet, scramjet and Brayton cycle similarity.
Think about it, newtons laws of thermodynamics tell us about the conservation of energy. We cannot create energy nor destroy it only convert it, energy losses are usually in the form of heat escaping. If turbos really operated on the pressure of the exhaust then compound turbocharging would be pointless and counterproductive as the force would push back on the piston during the exhaust stroke. Of course there's miniscule resistance, but the turbo really gets energy from the heat of exhaust.
The exhaust side of a turbo DOES produce backpressure which IN ITSELF would reduce an engine's power. However there is a NET GAIN in power from the increased intake air forced into the engine by the impeller on the intake side of the turbocharger.
Yes I am fully aware of the mechanical dirve of the compound turbos being used on a few modern heavy trucks.
Mechanical drive from compound turbos were also used on some airplanes in WWII
Excuse got turbine and impeller backwards. Might as well also note that what I meant by series turbocharging was to have the air compressed twice by two turbos. The advantage of turbo is of course more power without wasting energy. Superchargers are more responsive as they don't need to spool up to speed and you don't have to worry about overspeed and loss of lubrication to a spinning turbo after heavy engine load and immediate shutdown.
Actually the turbo uses the waste heat in the exhaust to compress the air without robbing the engine of power. This is unlike a supercharger which would be gear or belt driven and thus takes power from the crankshaft. Believe me or don't in recent years more commercial trucks have compound turbo charging (not talking about series turbocharging) where a second turbo has the impeller drive a gear on the geartrain to add power to the crankshaft instead of driving a turbine to compress air.
Gear case would need to be constructed on the side of the engine adding a bit of weight to house the idler gears and main gears for the crank and camshafts. Also the size of the gears would require the engine to be a little bit longer than it is currently to properly house the gears in the gear case. Not impossible its just they would have to redesign the engine to make it work with the current size constraints they have with their cars.
continuing.....
5 valve engines have smaller valves that enable higher revs - an advantage negated by better, lighter materials and stiffer springs
Bottom line - The marginal increase in volumetric efficiency is probably not worth the increase in cost and complexity. Similar improvements in breathing can possibly be made in other areas of design of a 4 valve engine without the cost increase of a 5 valve design
small gripe: "retaining frame for the crankshaft" is called a crank girdle. Otherwise the guy is right turbo exhaust wheels don't suck
Diesels are pretty efficient but don't believe the quoted mpg, especially when we're talking about NEDC mpg because manufacturers have become experts at cheating the test to get amazing fuel economy and emissions that aren't anywhere near real world numbers.
You'd be lucky to get more than 20mpg from a V10 TDI.
And for passenger cars. A turbodiesel is really really nice to drive as they use to have incredible low-down torque (here in Europe most prefer to use manual gearboxes so the engine characteristics do matter), and they consume noticeably less too. At least in European fuel prices, your wallet will thank you if your car runs on diesel.
I just amazed on the amount of stupid Hex bolts used on that engine... Its pretty obvious VW or Germans in General don't give a crap about rebuilding those engines in the future... Anyone that had a Head Hex Stripped on a careful maintained VW/AUDI car will understand..
In the old days before common rail injection technologies, having more valves was the best way to achieve best fuel dispersion in the zylinder. Now since that is achieved by high pressure injection, regulated by nozzle geometry and ecu chips, having 3 intake valves became obsolete.
new engines are all turbo. (petrol and gas both)
with a turbo engine you dont need 5valves per cylinder.
the turbo and injection make all the torque and hp.
you can safe the enormous engineering and fabrication-effort which are required in making 5valves per cylinder heads.
This turbocharger seems like GTB1756VK which has 56 mm on exducer (inducer 41,5mm), but on 3,0TDI are usually installed GTB2260VK which has 44,5/60 (inducer/exducer) ... and these spin really 200k RPM. We use these turbochargers on 1,9TDI and these spins about 250k RPM.
how can u even say that? seriously vw have the best diesel engines in the world and this is a fact because everyone uses them
less moving parts generally means more reliable as in there is less things to break. chances they abandoned it was because there was no longer a need to, maybe valve technology became more efficient making the use of 5 valves worthless.
If I remember right, Yamaha used it in earlier r1 models but then stopped making them because the intake port walls needed to be so thin, and the power gain is minimal compared to well designed 4-valve design :)
It's also cheaper to make and maintain.
horrible radial run-out when the cylinders walls were honed... not too impressive.
p.s.: as of june 13 2012, diesel is considered to be as carcinogenic as asbestos, so good luck with THAT engine
p.s.2: 4.2 V8 FSI is the only current engine audi made well.
Think about the children!!!
If that manual lift got replaced with an hydraulic, or electric lift His left leg would be out of a job, he would go on Unemployment, Then turn to drugs and end up living in a Box the lift came in.....circle of life...Hahahaha
Holy crap. Ya know I just finished rebuilding my 95 Z28 with an LT1 motor. I was like, dang engines have come a long way since the late 70's. Then I see this and thank god I only got ONE timing chain and ONE pair of valves per cylinder to deal with LOL.
they don´t test every engine, no. That would have been extremely time consuming and expensive. The test you saw here is tests that is done to only some cars in the production. How often these tests are done depends on car company and so on.
Do they really put each individual engine into a "test vehicle" - or do they do that just once for the first production car, to get the emission specs, then just assemble engines into their actual cars for the next few thousand units?
Definitely news to me that a turbo draws out the exhaust... Still a cool video though.
When they do this, audi is telling them what to say. The last thing they want ignorant people to hear is "it sucks power away" because that's all that would stick, when the turbo in concept does the opposite.
Well I would like to know that I have quality over speed lol they seem to take pride in their work. Look at GM and the way they asymble. They don't seem to last as long. Not dissing, I drive a 02 s10 lol just saying
Well yes and no,there is common rail injection which improves the poweroutput drastic by injecting diesel multiple times which each stroke but as you said,we won't see a Ferrari running on diesel any time soon.
I know diesel has come along way, even in the last 15 years, but most diesels rely on a turbo as most petrols don't. If the modern diesel had no turbo, I'm sure they would be pretty useless compared to petrol engines.
Lamborghinni IS under the Audi company, I think Bentley is too. Which is then under VW. Doesn't the Porsche family still have lots of VW ownership, and VW trying to get it all? It's just a family business.
I love the RS cars, A buddy of mine has an RS4 and indeed its fast enough for any track day but TBH I´ll take a BMW "M" car any day before an Audi RS... Especially the M3 E92 (Drools)...
It seems to me that you didn't understand the benefits of using more valves per cylinder...
1. You have more intake area surface
2. It is lighter and able to stand higher revs
a turbocharger both compressing the intake air and also drawing out the exhaust gas and sending it out the exhaust system. i would really like to have a turbocharger that can do that.
I just wish that VW group would use gears for the camshafts not chains and sprockets, they could really increase the power of their engines if they chose to use gears not chains.
I think they mean 30% better fuel economy. It may only be 7% more efficient but diesel stores more energy per litre which means you need to burn less for the same energy output.
its actually volkswagen that own man, seat, skoda, scania, lamborghini, bugatti, bentley, porsche and suzuki
and (sorry, forgot to write this in first response) I also consider the european version of honda accord to be the best value on the new car market right now
this is not a very acuate or correct presentation on this but whatever must have been some bs for the public.
1.) Put a turbo in an oven and heat it to 1.300F degrees and watch it spin.
2.) Did you ever see a windmill spinning on a hot day when there was no wind?
back then you need thousands of people to maintain a farm, now is 10 people with machines, I'd say we go back to manually operate farms to get MORE JOBS!
yes but we never used the acronym DCI TDCI or CDTI.
Italians use only the acronym JTD JTDM JTDM2
Isnt the whole idea to have the robots do the work while we chill, jobs are a failure of the system
OMG turbocharger has two turbines, exhaust turbine draws air out, increased pressure at high altitudes...
Yeah stick with television buddy.
or if your a german manufacturer you find some loophole to recharge your customer for a new engine.. I'll never touch VW or Audi ever again.
Some very dodgy descriptions in there... when did a turbo extract exactly? and turbocharged cars still suffer at altitude... just not as much.
So a Bugatti or Bentley is also a "re badged" VW? VW owns it all, now Audi div even owns Ducatti motorcycles. Mann and Seat, and Skoda.
That engine looks like a nightmare to work on full of plastic junk but its cool to see how an engine is made though cheers for the upload.
This stuff is so tedious. If we're watching this I think we understand that "cylindrical-shaped holes" are called cylinders. -____-
They are still not as efficient as they used to be because of the lower compression.
OMG @ 4:17 all that modern technology and you cant get an electric powered lift....... CMON
i have a manual engine hoist :/ i prefer it over a hydraulic, i feel like i have a better since of control over what i am doing
i wonder who these six people are? like really? is there someone going on everyones videos to dislike them?? i dont't get it
As you haven't heard - there is two turbos, one compresses air another takes exhaust out.
So everyone in the world must like Audis, and if they don't they are haters and abnormal?
They use 4 valve heads now that have 2 larger exhaust valves instead of the 3 small ones. Supposedly it works better....
Fun fact: Volvo's D24 is a Audi engine, so is the 2.5D in the 850/S/V70 and early S80s.
some day there was a worker did this job and decided it's bullshit and build an automatic crankshaft oiling machine ;)
everytime he says about polluting .. i laugh so hard..!