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Prius engine - Page 2

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Posted by Michael Pardee on August 18, 2005, 3:09 am

What I can't figure is what the conditions that cause it are. I've always
felt it when getting near a stop, but often it doesn't do it at all. Huh.


Posted by Marilyn & Bob on August 18, 2005, 3:25 pm
It sometimes happens when you stop a little more quickly than the gradual
stop that you get used to doing when driving the Prius.  When you stop
quickly, often a tiny bit of gas is left in the ICE when you have stopped
and the computer signals the ICE to shut down.  This results in a very
slight equivalent of "dieseling" or run-on which gives that slight shutter.
Forget about it.

Posted by dbs__usenet on August 21, 2005, 11:46 pm
My GUESS is that it's not dieseling at all, but is really the motors
that make up the transmission (CVT) turning out of step with the spinning
down gas engine.   IIRC, the motors spin the gears in the CVT  to cancel
out the gas engine's rotation.  If the engine stops quicker than the
electronics expect, it could cause that interesting noise as the motors
turn over the engine.

I could be wrong, of course.

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