[flagged]
Probably better for the environment too.
No
Internal Combustion Engine (2021)
11–20 of 112 posts
Re: Internal Combustion Engine (2021)
#12Wonderful but it irritates me that so many descriptions of internal combustion engines refer to "explosions" of the fuel. You don't want that. It causes knocking and pinging and engine damage. You want a controlled burn that generates heat smoothly.
Re: Internal Combustion Engine (2021)
#13" in real running engines the rotating crankshaft should float completely on a very thin surface of oil " - I found this to be a great insight.
The bearing surfaces in an engine (ex: crankshaft main bearings) have very tight tolerances, usually in the 15-25 thousandths of an inch. The engines oil pump fills those tiny gaps with pressurized oil which allow the metal surfaces to spin thousands of times per minute without damage.
This is also why if you have any issue with oil pressure (ex: oil pump failure, cracked oil line) or oil starvation (ex: driving a regular car on a race track, cornering forces slosh oil away from the oil pickup in the sump) issues, you'll damage your engine nearly immediately.
Re: Internal Combustion Engine (2021)
#14Excellent animations.
You meant - awful knocking combustion in the first, main animation? I never catches any real bug is those great posts, but this one, especially as first animation on the page - weird.
You might be misreading the animation. It's a direct injection engine, the thing that happens during the compression stroke is fuel injection. Ignition happens a few degrees before TDC, which is realistic.
Re: Internal Combustion Engine (2021)
#15If you like this kind of stuff go and look up videos on the Rolls Royce Crecy engine from WWII. Absolutely insane engineering that died due the dawn of jet propulsion.
Re: Internal Combustion Engine (2021)
#16> Presence of oil is critical here as it creates conditions for hydrodynamic lubrication. You can hear this effect in some vehicles at initial startup time for a few seconds. I know of certain Ford engines where it actually causes issues over time. The model years with auto start/stop have the worst of the cam rattle disease.
Note that that sentence is talking about the crankshaft bearings and their hydrodynamic lubrication, which is, well, elsewhere and separate from any cam rattle issues (including the cam phaser oil starvation that you might be referring to).
Re: Internal Combustion Engine (2021)
#17" in real running engines the rotating crankshaft should float completely on a very thin surface of oil " - I found this to be a great insight.
That's the point of all uses of oil, other than rust prevention.
Re: Internal Combustion Engine (2021)
#18Re: Internal Combustion Engine (2021)
#19Wonderful but it irritates me that so many descriptions of internal combustion engines refer to "explosions" of the fuel. You don't want that. It causes knocking and pinging and engine damage. You want a controlled burn that generates heat smoothly.
You don’t want detonation, but you do want deflagration.
Re: Internal Combustion Engine (2021)
#20Very interesting technology. Would be exciting to see a hardware startup build a product around this.