Posted by Michael Pardee on August 18, 2005, 3:09 am
>> Is it normal to feel a slight shudder when the gas engine turns on or
>> off?
> Yes. Many people have reported this; see for example
> http://www.priusonline.com and http://www.priuschat.com
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.
Mike
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.
--
Peace,
BobJ
>>
>>> Is it normal to feel a slight shudder when the gas engine turns on or
>>> off?
>>
>> Yes. Many people have reported this; see for example
>> http://www.priusonline.com and http://www.priuschat.com
> 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.
> Mike
>
Posted by dbs__usenet on August 21, 2005, 11:46 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.
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.
>> off?
> Yes. Many people have reported this; see for example
> http://www.priusonline.com and http://www.priuschat.com