4 stroke Diesel

[opmike343]

I like the part where the bottom of the piston slams into the crank.

[Fake4Eva123]

This isnt a 4 stroke diesel engine

[TheEMIR95]

Thank you for making me feel much better about my BMW 525 tds ,mod 1995 E.34 :)

[tarifa82]

este motor no es diesel, es gasolina. los diesel no usan bujias, y este utiliza una para producir la explosion.

[adv512]

ridiculously huge bore

[RandyRhoadsFan82]

@adv512 stroke not bore

[XELA2T]

Wow, - what a deviation with this short conrod, - anyway no bad animation, I wish I could do something like this, I am affraid it takes a long time to learn it and and to create an animation should be a very time intensive thing.

[MegaZsolti]

biiiiiiiiiiiiiiiiiiiiig bore O_O

[RandyRhoadsFan82]

@MegaZsolti not a big bore at all, what i think you meant is the stroke..

[MegaZsolti]

@RandyRhoadsFan82 ok lol

[dorantbb]

The video has it right, the charge should be injected before top dead center, counter-intuitive as it may seem. you have to remember that the charge wont ignite instantly and the speed that the engine is running at means that maximum pressure will be attained if injection occurs BFTDC. Ideally the engine would use VVT to make sure that maximum pressure always occurs at the optimum point (see johanj81's comment)

[virtu69]

Yes. He's right actual combustion should start after top dead center (TDC)

[bigun1999999]

no, combustion isnt instant. at high engine rpm the fuel should be injected earlier as the fuel does take some time to burn.

[clansman89]

I think diesel should be injected in the moment when piston passes highest point and starts going down.

In the video diesel is injected even before piston reaches highest point. That means explosion should have to rotate crankshaft in the opposite way. That would destroy the crankshaft.

Am I right?

[johanj81]

No the diesel doesn´t ignite instantly it uses a split second to ignite, that is time enough for the piston to come by topdeadcenter. maximum combustion pressure should normally be approximately 15 degrees after top dead center.

[bghs1482]

No, if that were so, the diesel would only deliver most of its power halfway down the stroke. At 2000 RPM, the piston is moving fast enough that by the time the fuel has completely ignited it is long past TDC. Hence, gas or diesel, your combustion is triggered before the piston gets to TDC. Ever timed your car?

[EMIR72CC]

@bghs1482 i thumbed u up , i have a bmw 525 tds E34 , new engine and so on , and it's told at 2200 Max torque can it deliver to me a good highs climbing at 2200 and thanks

[bhavintandelmhb]

while the first down stroke does it sucks diesel or air.

[KurtWagner064]

air, the diesel is the green