engine questions

[wangp1283]

Anyone know the mass and moment of inertia for a typical automobile engine flywheel?

Does high frequency, low intensity flutuating shock load damages engine?

I don't think it does, but I can be wrong.

But I think an engine is already always under flutuating conditions, such as cylinder firing, continuous "road shocks", ect...

thanks

 

[wangp1283]

let's say there is a 200 HZ small shock loads that causes the engine rpm to make small variations (like 2 rpm) 200 times per second, does that damage the engine? or cause any bad effects?

 

[icrman]

So many varied sizes of automobile engines, lots of variables.
And your describing crankshaft harmonics. And that is the reason for a dampening device. If the vibrating frequency is the same as the natural frequency of the crankshaft. Then bad things can happen. And the natural freq is determined by lots of various things. The material, the hardness of the material, the dimensions etc.