Re: Re: Toasted ring gear?

Posted by David in UT on July 08, 2004 at 15:41:19 from (208.15.63.194):

In Reply to: Re: Toasted ring gear? posted by Rich-Wi on July 08, 2004 at 03:55:31:

Rich,

Wow...that's an astute observation. Lemme see if I follow: on a four cyclinder engine, the pistons are moving in pairs...the pair moving downward would be in the power stroke and intake stroke, while the pair moving upward would be in the exhaust stroke and the compression stroke. Ah...think I just got it. Without an ignition spark to get the power stoke going, you'll have one of the cyclinders on its compression stroke. At some point during the compression, the flywheel won't have enough inertia to overcome the compression. That compression point should be roughly the same for each cylinder, with two pairs of pistons, that's 360 degrees / 2 = 180. Did I get that right?

And, I was going to say that the stopping point would depend on where in the rotation the ignition was killed, but the ignition isn't a constant force...it only applies during two very short periods on each rotation. So it doesn't really matter if the ignition kill happens at TDC immediately after the spark or when the piston is halfway down the cyclinder...the force has already been applied to the piston.

Just thinking out loud...helps me get it all straight. Did I pass the physics test?

Thanks,

- David

Follow Ups:

• Re: Re: Re: Toasted ring gear? Allan in NE 16:16:33 07/08/04 (0)

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