The gasoline example here is for IDI, aka port fuel injection, which is an old way of mixing fuel and air. These days, they use direct injection, which is the same way diesel operates, but there is still need for spark ignition.
It’s because of the compression ratio. Notice how the volume of air in the diesel is way less at top dead centre, compared to the gas one which has a larger cavity at the top. A higher compression ratio increases the temperatures. If you had gas in an engine with compression ratios as high as a diesel, the fuel would ignite before it reaches the top and cause problems, potentially damage.
Diesel fuel is actually a very thin oil, whereas gasoline is a solvent - which is like the opposite of an oil. The extremely high fuel pressures in modern diesel engines require a high pressure injection pump. The simplest way to lubricate those pumps is with the fluid that they're pumping. Diesel accomplishes this very well. Also, diesel fuel has more energy in it than gasoline, so I don't think gasoline would be any better in the power/fuel efficiency department.
I remember the hours I spent during my school days to understand how diesel engines work. I had only some images to support the theoretical portion of the book to understand it. Seeing this video brings back all those theoretical aspects to life, in a much more easily understandable manner. Thanks, Shell!
just imagine how millions of these combustions are happening each minute. and without them, we would still be spinning cotton by hand, and riding horses to work.
Millions? If you count every cylinder, a typical 4 cylinder rarely exceeds 14000 combustions per minute. 4 cylinders times 7000rpm divided by 2, as 4 stroke engine compresses every other rotation. Don't get me wrong, it is still impressive, but it's not that insane.
Now that I learnt something from you Shell, maybe I don't feel so bad with how much it cost me filling up my tank. Thanks faceless multi-national company!
A very informative video indeed. I like the animations, they really make it look very realistic! Now for two more of these informative videos complete with animations on how 2-stroke petrol & diesel engines work please. Thank you.
After 7 years this video uploaded, me who only use TH-cam for gaming video and anime suddenly got this in my recommendation. Thanks algorithm, for giving me knowledge I will never use.
Very nicely made and well detailed 3D animation about the key differences in the operating method of a diesel vs petrol engine. The foundational difference is the presence of a spark plug in the cylinder head of a petrol engine which ignites the fuel during every cycle of the piston whereas diesel doesn't as it uses the principle of compression to detonate the fuel. This means that while the battery is only necessary to start a diesel engine and not to make it run, it is essential in a petrol engine as, without electricity, the electrodes wouldn't be able to generate the spark. Another difference I can think of is the fact that a petrol engine can use either injectors or carburetors, diesel only uses the former.
@@anthonykobiec8569 Yeah you need them in cold weather to start the combustion. When its cool outside, the intake air and the cylinder are too cold to ignite the diesel. In very cold places like Finland where I´m from, pretty much every diesel car also has an engine block heater that you have to use when it gets too cold, otherwise the glow plugs arent enough and the car wont start.
A glow plug is a heating element that heats incoming fuel and air to encourage efficient fuel combustion in a diesel engine. The fuel combustion starts your engine so that you can drive. It is usually used to assist ignition in cold weather. Under normal conditions, a glow plug is not usually necessarily.
Anything uploaded to TH-cam is under fair usage laws, meaning you can use it for entertainment purposes, training, reaction videos etc. unless it's explicitly stated in the video or in its description that it's prohibited :)
So what then is the purpose of the glow plug? If the combustion commences with the compression and subsequent ignition of the air and then followed by introduction of diesel - is this just to achieve / maintain the explosion?
To aid in the heating of the air when the engine is cold, helps to start a stone cold engine easier, when the engine is hot the air gets hotter easier, so the glow plug isn’t needed after that.
@@joesinger2121 thankyou for explaining that,thats why glow plugs last longer than spark plugs then,also why it takes longer to start a diesel in colder weather
Wow, I have never seen a TH-cam video without a single dislike! (Hope I don’t jinx it). Great video and well deserved. There should be some TH-cam award for this…if there isn’t already.
@@peterherrington3300 haha chill, it's a 1500 it has some power. I used to race thousand CC Japanese bikes, so trust me I do understand true power, nice busa by the way, but the Harley does what I need for me now, I don't go beyond 180 anymore, the Harley does about 120 LOL and I'm fine with that
Diesel engines have become so efficient that the global restrictions and tariffs on them have become more or less obsolete and are bordering on unfairness, to the point that they should be treated as any other combustion engine rather than being used as a scapegoat for low emissions taxes and higher road taxes. All combustion engines are bad for the environment, yes. I'm not here to challenge or argue that, but Diesels' have as much use as any other fuel type, be it petrol or coal/gas/nuclear for electric vehicles. They all have something that they're good at but diesel engines don't deserve the stigma that they get. Once maybe but not anymore.
I'm fairly sure that it's considerably easier to produce biodiesel than it is to produce biopetrol as well. Shell does a fair amount of research into the production of biodiesel by algae, which is promising and may very well replace a considerable bit of traditionally produced diesel. I don't think there is anything like that for petrol yet. And there is a similar thing for kerosene as well btw.
@@pieterveenders9793 I have heard good things about hydrogen treated vegetable oil for use in diesel engines, with regards lack of pollution and high cetane properties.
Also diesels are much more efficient than gasoline, burning from 1/2 to 3/4 of what petrol engine of same size does. On roads outside cities, they are even more efficient than hybrids, while still providing decent power.
How does the process start? I imagine the flywheel forces the piston to diminish the volume in the cylinder, thereby pressuring up the contents but fresh air is introduced as the piston is compressing the air. What is pressurizing the fresh air in order for it to overcome the pressure in the piston?
@@KayC352 : Sorry, I meant "What is pressurizing the 'fuel' in order for it to overcome the pressure in the piston?" At 0:42, the narrator says "When the piston nears the top of the cylinder, fuel is injected under high-pressure"
@@KayC352 : Oh, so,...when the key is turned to "ignition", the battery provides the necessary energy for the fuel pump to pressurize the fuel enough to overcome the pressure in the cylinder..........that's a LOT of pressure and a lot of battery juice.
The part that is often forgotten is how fast all this happens in real-time. A whole piston revolution happening up to 116 X per second (7000 RPM) on a fast engine, that really is mind-blowing
When a diesel engine is switched off at the "ignition" key, what causes it to stop? At that instant, it is still turning, the valves are still working, air is drawn in and compressed. Are the injectors electrically operated? The diagram in the video shows a spring on the injector, but it never moves.
Everything is generally powered mechanically by the engine. Fuel shutoff is required to stop a Diesel engine. Older diesels had a manual lever to stop the fuel from being pumped. They do not require electricity to function, however newer engines have electronic shutoff and other things. You could start old diesels by pulling them and echnically they didn’t need any electrical system. Just a starter and lights.
@@delvictor7570 Thanks, Del. In fact, what you say doesn't apply in my case. The reason I asked is because my Citroen Picasso was occasionally missing a beat - by which I mean it was missing a single power stroke. I've had experience with petrol / gasolene engines (in the days before electronic ignition), but this is the first diesel I have had, so I didn't know what might be causing the hiccup - but it didn't happen more than a couple of times per day, so although I worried that it might get worse, I didn't churn my guts over it. I called a repair shop, but they told me that if the "engine" dashboard light was not on (it wasn't), there would be no fault to read from the EMU. I thought it would always get me home. *_WRONG!!_* When it failed, I was 35 miles from home (of course!). It wouldn't start at all, so I put it into 1st gear and drove it to the side of the road on the starter motor - to the accompaniment of impatient horns - my first experience of an EV! 😆 A good samaritan got me going again. He removed a plastic cover over the engine and asked me to start it so he could listen to it - and it started! - and I drove home. I took it for repair the next day and told them to read the fault codes. There were two (though the engine light wasn't on) - something about the glow plugs - I knew it wasn't that - and the crankshaft position sensor. That made some sense, as I had discovered in the interrim (from TH-cam videos) that the injectors are solenoid operated, so if one didn't fire, it would give me a missing power stroke. When the engine is switched off, the electyrical signal to the injectors is switched off. I thought there would be a mechanical coupling from the crankshaft to the injectors, just like the distributor on a petrol engine is driven mechanically - but there isn't. I was pretty amazed that solenoids would be fast enough. Turns out that the crankshaft sensor does the job of the distributor on a petrol engine, so I told them to replace it. It wasn't very expensive - and the car has never missed a beat since then. In fact, apart from this glitch, it has been completely reliable since 2006. Now, I know something about diesels - a miniscule amount - but _something._
Yeah thats pretty much it, glow plugs also heat the cylinder since diesel engines have to be pretty big and when its cold the heat disperses really fast. In very cold places like Finland where I´m from, pretty much every diesel car also has an engine block heater that you have to use when it gets too cold, otherwise the glow plugs arent enough and the car wont start.
Diesel fuel contains molecules with longer carbon chains (about 10-15) and more benzene derivatives (up to 25%), whereas gasoline is typically shorter chains (about 4-12) and a much lower proportion of benzene derivatives.
@@6z0 Doesn't seem to, no. Ethanol needs a spark to burn or higher temperatures than are produced in a diesel engine. It is possible to run a slightly modified diesel engine on 95% ethanol plud 5% additives to get the combustion going.
But how does this happen when we enter the key into ignition and the engine is at a stand still idle state. How does the piston start moving from idle ?
Trying to figure out why 1: This video was recommended to me 5 years after I last looked up how combustion engines work for uni, and 2: every single video on the side has been replaced by ones uploaded by Shell even though some of them only have hundreds of views. Looks like more slimy money gushing into Google's account again...
That engine didn't have to be a failure, but unfortunately it was, because the geniuses with the real power at GM had been following the same philosophy since the late 60s where the most important question was "How can we reduce the cost?" -- and "Does it actually work?" was a secondary question.
Petrol engines are mostly found in Lawnmowers, chainsaws, snowmobiles, boats, jet skis, scooters, motorcycles, quad bikes, go-karts and ultralight aircrafts Diesel Engines are mostly found in Cars, trucks, vans, buses, trains, tractors, industrial machinery, military vehicles, power generators, freight vessels and construction equipment
Finally a simple explanation on how diesel engines work! I completely understood petrol engines, but diesels were always enigma for me
@@chubbychubs4636 if it's cold outside you don't get a bang.
@@dragospahontumaybe your engine
@@VeltyGames mazda makes petrol engines work like diesel
Diesel works on witchcraft
The gasoline example here is for IDI, aka port fuel injection, which is an old way of mixing fuel and air. These days, they use direct injection, which is the same way diesel operates, but there is still need for spark ignition.
This video is perfect. Leave it to an oil company to explain diesel in less than 2mins
They also sell gas and diesel
@@anxiety1209 C
@@anxiety1209 gas and diesel are oil
Shell are actually a fossil fuel company, so it’s their business to know.
@@cliffbooth7075 it's their business to know fossil fuels. Not machine mechanics
It’s always baffled me how something so volatile and light as petrol requires a spark, and yet something so unreactive and heavy as diesel doesn’t.
It’s because of the compression ratio. Notice how the volume of air in the diesel is way less at top dead centre, compared to the gas one which has a larger cavity at the top. A higher compression ratio increases the temperatures. If you had gas in an engine with compression ratios as high as a diesel, the fuel would ignite before it reaches the top and cause problems, potentially damage.
@@Michael-fr8gy why not use gasoline in a diesel engine?
Diesel fuel is actually a very thin oil, whereas gasoline is a solvent - which is like the opposite of an oil. The extremely high fuel pressures in modern diesel engines require a high pressure injection pump. The simplest way to lubricate those pumps is with the fluid that they're pumping. Diesel accomplishes this very well. Also, diesel fuel has more energy in it than gasoline, so I don't think gasoline would be any better in the power/fuel efficiency department.
@@JayRussellDuramax thank you for that. 👍
@@emmanuelquerol gasoline is more susceptible to knock I believe
I remember the hours I spent during my school days to understand how diesel engines work. I had only some images to support the theoretical portion of the book to understand it. Seeing this video brings back all those theoretical aspects to life, in a much more easily understandable manner. Thanks, Shell!
Same here !
Greetings from a old timer
just imagine how millions of these combustions are happening each minute.
and without them, we would still be spinning cotton by hand, and riding horses to work.
Or driving Teslas. 🤔
Millions? If you count every cylinder, a typical 4 cylinder rarely exceeds 14000 combustions per minute. 4 cylinders times 7000rpm divided by 2, as 4 stroke engine compresses every other rotation. Don't get me wrong, it is still impressive, but it's not that insane.
@@glennso47 and how were the materials used in teslas mined? By using fuel dickhead
@@joeyeoman5912 teslas grow on trees dummy
Or cycling to work
Piston mechanics and physics explained in under two minutes.... impressive.
Simple and straight to the point.
Thank you Shell!
4 months later....
Still feel Grateful to the Money Grubbing pigs?
Thanks for ruining the planet for all future generations shell!
Thank you Shell, for burying your own report on climate change in 1986!
Are you people this fricking dumb? „Thank you Shell“? Frick me
Now pay 6.79 for their overpriced gas
@@friendofp.24 Lmfao
One of the best animations I've seen
Now that I learnt something from you Shell, maybe I don't feel so bad with how much it cost me filling up my tank. Thanks faceless multi-national company!
Don't forget to thank your dear fluffy government for the crippling cost of diesel fuel.
@@realbad5071 Please, don’t spark a political debate
@@126hrj There is no debate. Just what it is. One could debate that water is not wet and fire will not burn, yet the fact remains
@@realbad5071 But water isn't wet
@@realbad5071 The majority of the gas costs is due to market changes and faceless corporate profits, dumbass
Thank you Shell, very informative, can you lower gas prices now please?
A very informative video indeed. I like the animations, they really make it look very realistic!
Now for two more of these informative videos complete with animations on how 2-stroke petrol & diesel engines work please. Thank you.
Ystvs7 rxjx
Simplicity informative and understandable.
Thanks shell for this awesome illustration . Grait work
great
You almost nailed it 😂
It’s the thought that counts right guys?
grate
Greight
Fun fact: diesel is called “gasolio” in Italian while gasoline is called “benzina”
Yes. We are strange
In Polish we call diesel "Olej napędowy" - litteraly "Powering oil", or we also call it "Ropa", and for gasoline we call it "Benzyna"
@@Cristian88. it’s not only Italian, German use “benzin” and diesel, names are all over the place!
Similar in French, adds you might expect:
Gasoline = essence
Diesel = gazole
In Australia, UK, New Zealand we call Gasoline Petrol
I literally watched two different videos, about 15 minutes each, and this explained it quicker, and clearer.
Such complexity! Amazing to see how human technology has advanced so far.
I have no idea how this ended up in my recommendations nor do I know why I decided to watch this.
Finally! This is so short and to the point.
Thanks!
Been watching and can’t believe how Diesel engine really works
are you slow?
@@michaelcohen9363 are you fast?
@@Bluedragon2513 ask my girlfriend (no (I suffer from ED (and have no girlfriend))
Bornana moment
Living and learning. That Diesel man was another genious inventor, a revolutionary in the human's history!
Finally my first respect on Shell
Yeah, it really is a nice video.
After 7 years this video uploaded, me who only use TH-cam for gaming video and anime suddenly got this in my recommendation.
Thanks algorithm, for giving me knowledge I will never use.
Good job, youtube recomendations! You've done it again!!
Very nicely made and well detailed 3D animation about the key differences in the operating method of a diesel vs petrol engine. The foundational difference is the presence of a spark plug in the cylinder head of a petrol engine which ignites the fuel during every cycle of the piston whereas diesel doesn't as it uses the principle of compression to detonate the fuel. This means that while the battery is only necessary to start a diesel engine and not to make it run, it is essential in a petrol engine as, without electricity, the electrodes wouldn't be able to generate the spark. Another difference I can think of is the fact that a petrol engine can use either injectors or carburetors, diesel only uses the former.
The accurate injection of fuel in diesel is also made by electronic operated parts
I believe some Diesel engines had “glow plugs” to help with ignition.
@@anthonykobiec8569 Yeah you need them in cold weather to start the combustion. When its cool outside, the intake air and the cylinder are too cold to ignite the diesel. In very cold places like Finland where I´m from, pretty much every diesel car also has an engine block heater that you have to use when it gets too cold, otherwise the glow plugs arent enough and the car wont start.
Thanks, I will use this info to become CEO of Shell.
And then there is another Diesel: the one that uses the power of family
This comment is underrated 👏🏽
Big ups to Shell for this video
Simple and straight to the Point Nice!
I’ve been “into cars” for over 40 years and I didn’t know that Diesels draw in only air and not an air/fuel mix!
What does the glow plug do then?
A glow plug is a heating element that heats incoming fuel and air to encourage efficient fuel combustion in a diesel engine. The fuel combustion starts your engine so that you can drive. It is usually used to assist ignition in cold weather. Under normal conditions, a glow plug is not usually necessarily.
@@ctwentysevenj6531 It can actually be bad to use them in warm weather, depending on the engine.
How can I get permission to use this legally to teach a class the animations I have either do not work or very low quality
Anything uploaded to TH-cam is under fair usage laws, meaning you can use it for entertainment purposes, training, reaction videos etc. unless it's explicitly stated in the video or in its description that it's prohibited :)
th-cam.com/users/howyoutubeworkspolicies/copyright/#fair-use
Can’t wait for your EV video shell! No more oil spill fines 😬😬😬
Why does this matter, could you not have spark ignition for Diesel and compression ignition for gasoline?
Good explanation
This is why I always keep new spark plugs in my diesel truck.
So you can help out those gassers in need. You are a good guy
What about the glow plugs? Are they only used to heat the cylinder when you first turn on the car/truck?
Nicely explained.straight to the point,rather than a lengthy videos.
I always wondered how the diesel ignited at the top and it was that simple, its just injected at the top. Great video
So what then is the purpose of the glow plug? If the combustion commences with the compression and subsequent ignition of the air and then followed by introduction of diesel - is this just to achieve / maintain the explosion?
To aid in the heating of the air when the engine is cold, helps to start a stone cold engine easier, when the engine is hot the air gets hotter easier, so the glow plug isn’t needed after that.
@@joesinger2121 thankyou for explaining that,thats why glow plugs last longer than spark plugs then,also why it takes longer to start a diesel in colder weather
Only petrol engines with carburettor explained in this film. Modern petrol engines have direct fuel injection
Wow, I have never seen a TH-cam video without a single dislike! (Hope I don’t jinx it). Great video and well deserved. There should be some TH-cam award for this…if there isn’t already.
Love a good exhaust stroke
thank you mr. Shell. Such a good explanation
Shell is good we love from Turkey ❤
İ like clear WC and happy working ppl
Quick and simple to learn, thanks for the video
That's pretty cool! Well explained! We can be glad to have this technology!
👏🏻👏🏻👏🏻
From Brazil 🇧🇷 🇧🇷 🇧🇷
i didnt know shell makes videos like this
so the question remains, which of the two is the cleaner fuel...without referring to the somewhat "New" process involving a catalytic converter?
Hydrogen treated vegetable oil used in Diesel engines is apparently very clean.
What is more efficient?
Thanks shell
Pros: This is engineering making life easy
Cons: pollution, carbon emission
Does the air particle collide with each other when it is compressed ? Is friction between air particle/atom happening here ?
It's the speed of each that creates heat, they bump each other and with the piston too.
I think.
I power my Harley-Davidson with shell gasoline and I love you guys
Maybe "power" is the wrong word.
@@peterherrington3300 haha chill, it's a 1500 it has some power. I used to race thousand CC Japanese bikes, so trust me I do understand true power, nice busa by the way, but the Harley does what I need for me now, I don't go beyond 180 anymore, the Harley does about 120 LOL and I'm fine with that
What happened to ken saro wiwa on 10 November 1995, shell?
I had no idea, that's so cool to know.
So why the need for a different kind of oil? What is the difference between the oils?
Diesel engines have become so efficient that the global restrictions and tariffs on them have become more or less obsolete and are bordering on unfairness, to the point that they should be treated as any other combustion engine rather than being used as a scapegoat for low emissions taxes and higher road taxes. All combustion engines are bad for the environment, yes. I'm not here to challenge or argue that, but Diesels' have as much use as any other fuel type, be it petrol or coal/gas/nuclear for electric vehicles. They all have something that they're good at but diesel engines don't deserve the stigma that they get. Once maybe but not anymore.
why are Diesels more stigmatised than petrol?
@@dhollsynthmusic they make more air pollutants than petrol but produce much less co2
I'm fairly sure that it's considerably easier to produce biodiesel than it is to produce biopetrol as well. Shell does a fair amount of research into the production of biodiesel by algae, which is promising and may very well replace a considerable bit of traditionally produced diesel. I don't think there is anything like that for petrol yet. And there is a similar thing for kerosene as well btw.
@@pieterveenders9793 I have heard good things about hydrogen treated vegetable oil for use in diesel engines, with regards lack of pollution and high cetane properties.
Also diesels are much more efficient than gasoline, burning from 1/2 to 3/4 of what petrol engine of same size does. On roads outside cities, they are even more efficient than hybrids, while still providing decent power.
thank you for teaching
its very clear
a nice, concise no faff explanation with time wasted waffling on about likes and their channel...
nice
How does the process start?
I imagine the flywheel forces the piston to diminish the volume in the cylinder, thereby pressuring up the contents but fresh air is introduced as the piston is compressing the air.
What is pressurizing the fresh air in order for it to overcome the pressure in the piston?
You are thinking of the exhaust valve, not the air intake valve.
@@KayC352 : Sorry, I meant "What is pressurizing the 'fuel' in order for it to overcome the pressure in the piston?"
At 0:42, the narrator says "When the piston nears the top of the cylinder, fuel is injected under high-pressure"
@@machonsote918 the fuel pump is pressurizing the fuel
@@KayC352 : Oh, so,...when the key is turned to "ignition", the battery provides the necessary energy for the fuel pump to pressurize the fuel enough to overcome the pressure in the cylinder..........that's a LOT of pressure and a lot of battery juice.
@@machonsote918 ok so what?
Yall should show how the oil spill you caused happened next
The part that is often forgotten is how fast all this happens in real-time. A whole piston revolution happening up to 116 X per second (7000 RPM) on a fast engine, that really is mind-blowing
When a diesel engine is switched off at the "ignition" key, what causes it to stop? At that instant, it is still turning, the valves are still working, air is drawn in and compressed. Are the injectors electrically operated? The diagram in the video shows a spring on the injector, but it never moves.
Everything is generally powered mechanically by the engine. Fuel shutoff is required to stop a Diesel engine. Older diesels had a manual lever to stop the fuel from being pumped. They do not require electricity to function, however newer engines have electronic shutoff and other things. You could start old diesels by pulling them and echnically they didn’t need any electrical system. Just a starter and lights.
@@delvictor7570 Thanks, Del. In fact, what you say doesn't apply in my case. The reason I asked is because my Citroen Picasso was occasionally missing a beat - by which I mean it was missing a single power stroke. I've had experience with petrol / gasolene engines (in the days before electronic ignition), but this is the first diesel I have had, so I didn't know what might be causing the hiccup - but it didn't happen more than a couple of times per day, so although I worried that it might get worse, I didn't churn my guts over it. I called a repair shop, but they told me that if the "engine" dashboard light was not on (it wasn't), there would be no fault to read from the EMU. I thought it would always get me home. *_WRONG!!_* When it failed, I was 35 miles from home (of course!). It wouldn't start at all, so I put it into 1st gear and drove it to the side of the road on the starter motor - to the accompaniment of impatient horns - my first experience of an EV! 😆 A good samaritan got me going again. He removed a plastic cover over the engine and asked me to start it so he could listen to it - and it started! - and I drove home.
I took it for repair the next day and told them to read the fault codes. There were two (though the engine light wasn't on) - something about the glow plugs - I knew it wasn't that - and the crankshaft position sensor. That made some sense, as I had discovered in the interrim (from TH-cam videos) that the injectors are solenoid operated, so if one didn't fire, it would give me a missing power stroke. When the engine is switched off, the electyrical signal to the injectors is switched off. I thought there would be a mechanical coupling from the crankshaft to the injectors, just like the distributor on a petrol engine is driven mechanically - but there isn't. I was pretty amazed that solenoids would be fast enough. Turns out that the crankshaft sensor does the job of the distributor on a petrol engine, so I told them to replace it. It wasn't very expensive - and the car has never missed a beat since then. In fact, apart from this glitch, it has been completely reliable since 2006.
Now, I know something about diesels - a miniscule amount - but _something._
Thank you Shell, very cool.
Perfect now i know, finally ;) thanks!
Wow 👏 simple explanation
I like the smell of diesel in the morning!
What does a glow plug do, simulate the heat that compressing the air when it’s cold. So the cold air is hot enough to spontaneously combust?
Yeah thats pretty much it, glow plugs also heat the cylinder since diesel engines have to be pretty big and when its cold the heat disperses really fast.
In very cold places like Finland where I´m from, pretty much every diesel car also has an engine block heater that you have to use when it gets too cold, otherwise the glow plugs arent enough and the car wont start.
Wait so what if it’s very cold outside?
the engine has a harder time starting, or won't start at all. This is why desil engines won't turn over when it is extremely cold
So now we know the difference between the 2 motors. Now what’s the difference between the fuels?
Diesel fuel contains molecules with longer carbon chains (about 10-15) and more benzene derivatives (up to 25%), whereas gasoline is typically shorter chains (about 4-12) and a much lower proportion of benzene derivatives.
@@beeble2003 does diesel use ethanol like gasoline?
@@6z0 Doesn't seem to, no. Ethanol needs a spark to burn or higher temperatures than are produced in a diesel engine. It is possible to run a slightly modified diesel engine on 95% ethanol plud 5% additives to get the combustion going.
Today I'm freshman engineering student and had a discussion with my colleague Eng. Aly Hazem
let the history remember
But how does this happen when we enter the key into ignition and the engine is at a stand still idle state. How does the piston start moving from idle ?
TH-cam decided to reccomended me this today.
What powers the piston to compress the air?
777k views. 7 years ago 😲 and now it's being recommended
Trying to figure out why 1: This video was recommended to me 5 years after I last looked up how combustion engines work for uni, and 2: every single video on the side has been replaced by ones uploaded by Shell even though some of them only have hundreds of views. Looks like more slimy money gushing into Google's account again...
great explanation thankyou
I have no words
Thanks sir for this much clear explanation
Thanks. Now i know how a disel engine works
Thank you TH-cam recommendations
So the motion of the pistons generates the pressure which heats the air which burns the fuel which moves the pistons, etc.
that’s really a great video
This are the questions I am too lazy to search so youtube recommended it to me.
Amazing content makreting!
Highly detailed that i can see fuel cutoff 🔥🔥🔥
it was a wonderful clip very educative
Domt gas engines have direct fuel injection now as well?
0:23 where it starts
1:28 comparison with gasoline engine
Best explanation.
Thanks SHELL. NOW MAYBE ALLOW US TO USE THEM WITHOUT RIPPING US OFF!?
The algorithm has chosen
They work until they don’t. Just ask anyone who owned an Oldsmobile diesel in the 1980s. 😱
That engine didn't have to be a failure, but unfortunately it was, because the geniuses with the real power at GM had been following the same philosophy since the late 60s where the most important question was "How can we reduce the cost?" -- and "Does it actually work?" was a secondary question.
Petrol engines are mostly found in
Lawnmowers, chainsaws, snowmobiles, boats, jet skis, scooters, motorcycles, quad bikes, go-karts and ultralight aircrafts
Diesel Engines are mostly found in
Cars, trucks, vans, buses, trains, tractors, industrial machinery, military vehicles, power generators, freight vessels and construction equipment
Clearly explained and understood thank you 🙏
Happy Diesel Engine Day-February 23 watching this to celebrate
@Shell Can you now explain the Mazda X engine. It uses compression and spark.
Very interesting stuff I like it.
Thanks Shell
So where do the glow plugs come into play?