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109,939 Views • Feb 21, 2024 • Click to toggle off description
Views : 109,939
Genre: Autos & Vehicles
Date of upload: Feb 21, 2024 ^^
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User score: 96.19- Overwhelmingly Positive
RYD date created : 2024-06-28T02:30:22.35332Z
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YouTube Comments - 109 Comments
Top Comments of this video!! :3
That loop was smoother than most engines
107 |
Doesn't the "knock-ignition" also mean that the flame front is moving like 10x the speed of the normal one? In the german wording it's "detonation" vs "combustion". That's why knock is so damaging. At least that's how I learned it. Please correct me if I'm wrong.
74 |
It can also happen before the spark plug ignites, not just after. Hence "preignition." This can also mean that carbureted vehicles without a fuel cut solenoid can continue to run for a short period after the ignition is disabled, an effect known as "dieseling," for obvious reasons.
14 |
It's important to understand that gasoline engines require a spark plug because gasoline is more volatile than diesel so we ignite it earlier in the stroke compared to diesel which would combust at max compression. Gasoline would also combust at max compression but as I said, more volatile, so we ignite it early so that it doesn't give the full potential it would have when fully compressed. Like in a diesel.
10 |
In short, fuel/ air mixture doesn’t explode, it burns at 300 fps, and heat expansion pushes the piston down. An explosion from self ignition, from a hot spot on the piston or combustion chamber, or low octane fuel happens at 3000 fps. The knock or ping sound is your rod bearings slapping through the oil film and into your crankshaft. Ouch!
2 |
Don’t ever give up on utube. Even if it doesn’t take off majorly, you have a group that will watch loyally. I really enjoy you videos. Can’t wait to see if it’s gold!!!
5 |
Not sure if everyone pays attention but I genuinely appreciate the effort and detail you put into these technical explanations 👏🏻 understanding why something happens helps so much more than just accepting the answer.
Knowing that molecules bumping into each other more is what causes the heat can be translated to other areas of science as well, so we're learning about more than cars now thanks to this level of detail 🙌🏻 huge respect
2 |
Sounds like Christoph Waltz.
7 |
great video !!
1 |
This reminds me of the Mazda Skyactiv-X engine. How are they different?
1 |
This makes so much sense, never really thought about it before, cool to know
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The more difficult the path for the flame to travel, the more likely for detonation. Old V8 engines with domed pistons had horrible combustion chamber efficiency and needed lots of octane.
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Lower octane fuel has a lower ignition temp. That is why high compression engines require higher octane.
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so basically its the engine version of premature ventricular contraction
1 |
2017 Honda Civic Hatchback
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Wait, and what is the second way that creates heat?
2 |
Do you ping? Because knock knock who is there? Rodney
1 |
I always thought knock was pre ignition. But youre telling us its post ignition.
How might pre ignition be achieved and is it the same as knock
9 |
A question. Does a lean fuel mixture increase temperature to the degree that knock would occur and if so would tuning the fuel to air ratio richer in a car that has knock alleviate the problem? Assuming of course that you are alredy running high octane and the engine is otherwise working properly.
2 |
@micgalovic
4 months ago
Knock knock Who is there? Cylinder damage
549 |