What's the Difference Between Petrol & Diesel? | Bang Goes The The Theory | Earth Science
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- čas přidán 15. 05. 2015
- Jem Stansfield highlights the differences between petrol and diesel in an explosive way.
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Wawww.. One of the best explanation in youtube about these engine differences
I love how they mentioned the greater amount of harmfull particles when compared to gasoline but not the halfed co2 emissions
Luv this, and please allow me to share how this fare in ISO14001:2015 in one of its evaluation criteria: czcams.com/video/fKu9UlARkzs/video.html
@@KhalidMA Don't self promote you tw@t
Two comments in this section are not viewable. Odd.
pure C (carbon dus₺ // soo₺} is eAsiLy AbsoRbeD by Na₺uRe. reiN₺egRa₺eD. diesel burns less, being less flammable, so i₺ genera₺es Less CO2. . which is No₺ As Easily ReabsoRbed by nA₺uRe {harder ₺o break down, unless plan₺s "brea₺he" i₺ in}.
CO2 leAds ₺o carbon dioxide poisoning {suffoca₺ion}, whiLe soo₺ iS cleAned from lungs by. . *coughing*
So SimpLe, aNd eAsy. i₺ DoeSn'₺ Ge₺ 'inSide' uR boDy. non·iN₺Rusive. Na₺uRaL. HeAl₺hy {like second hand smoking, bu₺ even less 'soo₺', or being near barbeque}
Because who cares about co2 levels? Only brainwashed wackos and crazy stupid environmentalists who believe in myths preached by deceivers in power about negative impact of co2 on the climate. CO2 is a natural clean gas all the plants and trees rely on, and the more co2 the more growth which in turn produces more oxygen.
The diesel particulate filter has been introduced years back to deal with this issue. There are some variants, some using urea injection and some using a secondary burn function to break the soot particles down, but either way emission standards are in full effect for both diesel and petrol systems.
It wouldve been nice to have an explanatory caveat to at least skim over the difference of diesel being compression ignition instead of spark ignition, but I suppose that's just me being a picky mechanic.
You are right about the diesel particulate filter (DPF). The DPF and Diesel Oxidation Catalyst DOC need some heat for properly working, this could be done by burn some fuel before the two systems. This could also done with injection delay (or pilot injections), and/or early opening the exhaust valves.
But the urea injection doen't take place before the DPF, that is done before a Selective Catalytic Reduction (SCR). This done to reduce the amount of NOx in the gases. In the SCR the urea(ammonia) reacts with the NOx.
Bbc wouldnt put that in their video, all they want is for people to switch to electric. Even if there is ways to make petrol and desil more environmentally friendly
Quite a lot of additional information.
@@ajg8600 Yes it's a really simplistic look at the combustion differences which I have highlighted, and which from presenter's attitude and information provided does not give the student any tools to understand why diesel engines exist, and how we now get around the (tiny) amount of soot that they emit at high temperature normal cruising speed. See my long-winded complaint about this a little earlier, which is intended as food for thought on the facts of the not so nice petrol engine that is supposed (many believe falsely) to be cleaner. It is not, even though it appears so.
Fireflies by Owl City playing the background. Man, what a throwback.
These kinds of demonstrations just stick to your head i mean its so useful and informative...loved the video and presentation
You should have also added the pluses of diesel. Because if there was no upside to diesels, nobody would buy them :p
Hearing you on FM matey. A bit over a year ago I had to switch to an estate car from a compact and went diesel at the same time. Despite being a larger vehicle the I'm getting more miles/£ than with the petrol compact. Couldn't afford to go back now.
***** Man nobody cares about positives. Everyone loves to focus on the negatives.
***** it''s cheap. That's good if you love to live in the present and not give a damn to what you leave behind for the future.
subh1 actually, at most pumps, Diesel is more expensive than Gasoline. And maybe that is also worth explaining ;)
***** It costs less to make, I'm only speculating, but I think the reason that it costs the consumer so much is due to a tax on diesel.
Found myself a new version of Tim Hunkin.. Great video sir. Make many more please or preferably fewer with longer reel times. Secret Life Of Machines is one of my favorites and now so this, Brit Lab.
Unbelievably, great explanations from practical standpoint. Quite inspiring and helpful in learning for any physics student! 😊
Why would you claim that the fuel has impurities and why we see the yellow color in the flames, yet to conclude you claim that not all the droplets ignite and why they form the soot? The droplets do ignite and they contain impurities in solvent aquious solution, and they burn into a solid biproduct carbon soot. They are not remains from not burning.
@@philindeblanc no
@@jonathanhughman154 You can believe what you want. empirical evidence doesnt care.
This episode was extremely disappointing. The soot from diesel exhaust isn't near as toxic as the gasses given of from petrol combustion. Diesel is also ignited by pressure instead of a spark or other heat source. You get different torque and power curves between the two fuels with diesel leaning toward a lot more torque than horsepower. If you're going to go through the trouble of explaining something, please explain it fully and correctly.
+1 your typical bbc biased bullshit.
Logan Fehr Forgot to mention here, Diesel engines are heavier due to the increased pressure required to 'burn' the diesel, so in general Diesel engine blocks are made out of heavier cast iron. Petrol blocks can be made out of Steel or Aluminium.
Diesel engines also uses Glow Plugs to warm the fuel-air mixture (initially), making it easier to combust. Once the block heats up though, the Glow plugs are no longer needed since the heat from combustion keeps the cylinders warm.
There's a lot more, but they were probably aiming for a short "webisode" so couldn't go into further detail (not that a lot of people would care to be honest, they most likely just want the barebones).
001razz This was the video that caused me to unsub from Brit Lab
Logan Fehr Diesel cars are extremely bad on NOx while petrol cars only emmit a tiny amount of it. NOx is much more toxic than CO2. Diesel cars not only emmit the visible soot, but also emmit particles so small they can enter trough the skin. They are so small they are attracted by large objects like humans and animals, just like we are attracted to the earth.
Logan Fehr With modern catalytic converters, and electronic fuel injection systems, there are virtually no relevant emissions from petrol combustion. There are virtually no hydrocarbon emissions, virtually no NOx emissions and virtually no carbon monoxide emissions, due to the use of stoichiometric combustion and three-way catalysts. Petrol exhaust on a relatively recent car is near harmless carbon dioxide and water vapour.
Diesel combustion, however, produces high levels of particulate matter (soot) and high levels of NOx (a cause of smog and an chemical harmful to respiratory health).
As a result modern diesel cars now come with diesel particulate filters (which reduce soot by about 90-95%) and they use EGR technology which reduces NOx. Commerical vehicles often don't use EGR for reliability reasons, so may use selective catalytic reduction where urea solution (adblue) is injected into the exhaust stream and processed in a special catalytic converter.
At the same time, the most modern petrol cars have switched to common-rail direct injection fueling - this doesn't mix or vaporise the fuel as well as older fuel injection systems - as a result there is some soot production in modern petrol cars.
well explained so well even my cat can understand the difference between the 2, best of all the real experimental combustion demo was well executed with common household items!! well done!
its more efficient
Practical working shown, You made concept very easier to understand for students. Thank you.
Quite a useful video.Very clear & composed talk.
keep up the good work
I liked this video, felt very high quality!
Very disappointing, it fails to explain WHY we still use diesels and why they are actually preferable in many applications. As for the soot, even old diesel engines can be made to be mostly soot free by running high enough air to fuel ratios.
For those wondering WHY we use diesel engines. The diesel ignition process whilst far less controlled and more dirty than the petrol engine process produces more torque lower down and significantly better thermal and mechanical efficiency and despite the fact that diesel produces more CO2 per L of fuel burnt, it's higher efficiency means that more often than not diesel powered cars still produce less CO2.
typical diesel engines also have a longer lifespan and better durability than petrol engines due to the nature of their design.
but diesel fumes are more toxic to people
+alex ojideagu The fumes are much more dangerous from petrol than diesel, especially in newer cars with direct injection. However, it's much easier to clean petrol fumes in the exhaust system than diesel fumes (NOx are especially problematic). Well, actually, it's just as easy (with AdBlue), the system is just expensive so car companies totally screw it.
+alex ojideagu no, diesel fumes are practically non-existent in the atmosphere because the flashpoint of diesel is much greater than atmospheric temperatures anywhere on Earth.
+Spencer Howard They used put led in petrol and led is toxic.
+BadwolfGamer Not since the 70's. Modern petrol/gasoline contains no lead
That's not how a Diesel engine works. They ignite the fuel air mix by rapidly compressing it at high pressure.
Dave L
Good luck replicating that with plastic soda bottles.
Diesel is injected directly into the combustion chamber, when the piston is approaching Top Dead Centre. The compression of air is what causes the temperature to rise (temperature and pressure are directly related), igniting the diesel vapor.
yes I know
+st2en center.....
Nick Cross
nope it's CENTRE. It's called the English language, we invented it and decide how it's spelled. Oh, and it's ALUMINIUM too :D
This video deserves more views that's an amazing example you would be an amazing teacher
This vid was F awesome. Iam very interested in this channel and I love it. Post more vids. Id like to see a vid about aeroplanes or helicopters and the difference between the functions of the engine and even thr type of fuel they use.
Actually petrol engines produce soot as well, but the soot particulates are so small people generally disregard it. The newest generation of catalytic converters on a petrol engine is moving away from three-way to four-way. Also, the "adblue" added into the diesel exhaust now pretty much completely eliminates NOx, so our understanding of diesel and petrol exhaust is still stuck in the last century. I should know, I spent my doctoral years studying on these.
shut the fuck up idiot
That was so informative and entertaining. Thanks!!
wow this was actually a really great video, thanks guys
Interesting knowledge. I didn't know the difference between the two fuels.
Absolutely fantastic demonstration 👏🏻👏🏻👏🏻
Thanks for letting me know. Very informative.
The video is good for understanding the difference in volatility of both the fuels so the people can know why petrol engines are spark ignited ( spark given directly to compressed air and fuel mixture) and diesel engines and compression ignited ( fuel is sprayed directly into hot compressed air above self ignition tempereture of diesel).
Thanks Great Video Excellent Camera And Lighting Decorations Very Beautiful
simply the brilliant explanation. nice work
Really nice work. Enjoyed and was helpful....
please more of this
Best ever explanation!
1:00 OK, I would just go outside!
Thanks that was really educating.
I learned stuff just now. Thank you.
this is the best video in this field!!!
Incredibly well done!
Very simple excellent explanation thanx
Very nice video ! I really like your setup, I'd play with it all day long , lol !
I approve your logo! Volvo 4 life
Wow I was just wondering that 2 or 3 days ago.. Thanks guys!
The best explanation I have ever read n heard...
Keep in mind he's talking about diesel engines that don't have any kind of reduction or NO x reduction systems and even some diesel engines that dont use a super high pressure injection system . A system which helps burn the fuel cleaner and more efficiently still really sooty but not like older engine. And I know its mostly older cars that lack this but most modern cars have turbo or some sort of forced induction system installed which also helps with the dirty burning of diesel also increases the power a lot.
Very good practical and very good explain.... Maind clear
Thanks for describing this...!
Do more on this topic please!
thanks for this vidio . Good for practicle knowledge
Is it me or is there a problem with the thumbnail of this video?
***** not just this one. The video in my feed above this one as well.
Must be on youtube's part
PrimaPunchy Out of all my subscriptions though, this channel is the only one with this problem.
This video thumbnail is showing for me now. However, a few hours ago, this video and along with 4 other videos had no thumbnails in my subscriptions listing.
***** lately quite a few videos thumbnails haven't been appearing properly for me on my sub feed :i
***** Googletube loves to change things to give its coders something to do to justify paying them, even if they may a feature worse or non-functional.
I love the fireflies background music at the beginning
बहुत बहुत अच्छा स्पष्टीकरण...धन्यवाद
Excellent presentation
After watching video:: "that's excellent explanation"
After reading comments:: "heck, he donno anything !!🤷"
Diesel pollutes far less and is far more efficient. The powers that be would much rather have gas as the primary source of fuel because Gas engines require more than diesel engines and therefore they will sell more in the long run.
@@irishsavage8715 Just not true, diesel may emit less carbon dioxide but more nitrogen oxides and soot, which is carcinogenic
Excellent demonstration
ive owned a 1.9diesel van since 2015, ive wrote down every amount of fuel ive put in it, im quite shocked how much i have put in it.
considering i hardly use it, i dont work much so its not done that much commuting, often there was weeks id never use it, but still ive put in 2928 pounds of diesel.
thats more than ive ever had in savings.
wonderful information, thanks :D
Nice explain , what did you use for burn diesel in this video ??
Great video! Thanks
Nice video.. really liked it.
Short and informative.
thank you for explain this
the reason diesel is used in the agricultural and forestry sector over petrol is because while diesel is more of a pollutant, the fact that it cant ignite readily means that if it leaks into an arable field or within a forest it cant burn it all down, both fuel types are terrible for the soil, but a little poisoned soil is better than acres of land on fire.
+diesel engines have more torque in low revs negating the need for a more complex gearbox to get useable output torque at the wheels.
Thank you. Good work.
Powerful video good job
very well explained!
1 million subscribe soon . Congratulation !
very nice presentation
Awesome explanation on engine bro
hi if incase of adding more percentage of kerosene with Diesel what will be the output.. can you demonstrate..
great demonstration
Great video!
hi if incase of adding more percentage of kerosene what will be the output..
Fantastic!!! Thank you!!
absolutely fantastic...
Nice explanation 👍🏻
Very nice explain thanks bro
very good video i understand thank you
Nice presentation. i love it👏👏👏
Haha nice a Killers instrumental on that first ignition
You mentioned that the fuel doesn’t have enough time to burn off, resulting in soot - what is the reason the fuel burn so fast and if an engine design may help in slowing down the combustion and maybe cleaner exhaust?
I think many are confused about the video. If you were to compare a stoichiometric diesel and petrol combustion process, petrol will be a cleaner combustion because of its intrinsic fuel properties. Diesel combustion is slower and incomplete, which leaves the soot. However, with current aftertreatment systems, diesel engines run on par with petrol when it comes to tailpipe emissions. Diesel does have better thermal efficiency than petrol, but it is a three minute video. Maybe he should also explain the compression and expansion work. I think all in all it is an informative video for someone who does not want to throw a match in a bucket of petrol.
Most diesel engines nowadays dont give of much exhaust gases or soot. Like for example, the Rottne D21 is big a forest machine that runs on a big diesel engine but the exhaust system is so effective that its mostly just water steam that comes out of the exhaust.
+DragonBorn A properly tuned engine produces very little emission, especially with a diesel since the fuel has a higher btu/liter than gasoline and a lower volatility. If someone can figure out a way to clean car exhaust without sapping power, I'm all for it, but until then, it seems like a waste.
So petrol cars would be more environmentally friendly or...?
They always were, still are, but it's closer these days because diesels have tons of filters to deal with emissions
Oscar Same Depends how the electricity is made ... When it 's made with burning coal (most countries do that) you better run your car with petrol...
johannes914 not really still. Electric engines are the most efficient engines we have. Coal burning is about as bad as petrol.
Oscar Same Burning coal releases A LOT of emissions and 70% of electricity in the world is produced by burning coal gas or oil. If 100% of the cars in the world were electric it would be a giant mess.
johannes914 I agree that coal is bad. But petrol is just as bad. We need electric and hydrogen coupled with more nuclear power plants
May 2015: "All but the latest diesels"
September 2015: "Oh...."
Amazing video, it clearly shows how it works. it doesn't some shit the guy below me wants but you can find that elsewhere. awesome.
Im definitely trying this at home☺
The most informative video for watching the late Top "so called" Gear
Loved it! thanks
finally understand the difference.. thanks..👍
I really like this a lot.
as a layman, I just want to know how can I convert my petrol to diesel. 100cc. shall I just replace the spark plug with injector/ atomizer? how to get the timing right? do we need a glowplug, as normal temp ranges bw 20 to 40.
Best explanation ❤️
How about if we just put that match to an oil, without getting contact with a gasoline vapor?? Will it burn?? If u know pls answer me
Petrol or gasoline is a blend of Octane C8H18 and Heptane C7H16 which, like Methane CH4 ( Natural Gas ) and Propane C3H8, are alkanes which have no detectable odor. A Thiol like mercaptan is used as a tracer to allow sensing the presence of Methane and Propane gas, but what are the additives in Petrol responsible for it's characteristic odor ?
The best gas vs diesel video ever!
thanks so much
Hello bigman what is that cylinder made of. Is that glass or clear pvc pipe.
Very inspirational
Now i learned thanks
Very nice!
Excellent....
Also modern diesels (especially heavy applications) run very high boost and very high injection that produces much cleaner emissions and strong power that a petrol engine could not produce with the same thermodynamic efficiency ( very heavy fuel consumption).
Interesting stuff
Too bad this wasn't made a couple of months ago when I talked about this with my students. Might use it next semester though. =)
If you use this as a training aide you most likely know less about engines then your students…this video doesn’t mention A volume of compression B heat value 😂 very important things when it comes to Diesel engines…the energy density of the fuel is better with diesel and thanks to modern technology often cleaner then gasoline. Particulate emissions fall to the ground once it cools and doesn’t stay suspended in the air like gasoline engine emissions for all the reasons he mentioned , he just conveniently left that out to push EU BS propaganda
@@localenterprisebroadcastin5971 Wow, necroposting much? Considering that I taught kids ages 12-16y/o back then, details such as that probably aren't important for learning the basics. The ones that go on to become mechanics learn that in later stages of their education. I don't remember what's in the vid, but your post sounds a bit like requiring a minecraft player to learn about slipforming, rebar and the resistance coefficient of redstone.
@@localenterprisebroadcastin5971 I don't know what to believe. Recently in my state, government banned diesel vehicles(older than 10 years) and petrol vehicles(older than 15 years) because of increasing level of air pollution. I live in India. Haryana state.
Nice!