Hybrid Car – More Fun with Less Gas

Prius C - Test Drive thoughts - Page 5

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Posted by rjdriver on April 30, 2012, 4:45 pm
 

I should not have used the word "slide" to refer to what happens in
the planetary gearset used in the Prius PSD (variable transmission).
Although it occurs smooth enough (except for News) to refer to it that
way.  It's actually a very interesting way to transfer power between
multiple sources, and, as everything else in the Prius, is geared
towards (no pun intened) maximum efficiency and MPG.

Fascinating interactive animation here: http://eahart.com/prius/psd/

Make my slush cherry flavored, please



Bob

Posted by News on April 30, 2012, 5:47 pm
 
On 4/30/2012 12:45 PM, rjdriver wrote:

Nice animation.  Too many degrees of freedom for any single flavor.

Posted by EARTHLINK EAST on May 1, 2012, 8:09 pm
 

"rjdriver"  wrote in message


I should not have used the word "slide" to refer to what happens in
the planetary gearset used in the Prius PSD (variable transmission).
Although it occurs smooth enough (except for News) to refer to it that
way.  It's actually a very interesting way to transfer power between
multiple sources, and, as everything else in the Prius, is geared
towards (no pun intened) maximum efficiency and MPG.

Fascinating interactive animation here: http://eahart.com/prius/psd/

Make my slush cherry flavored, please



Bob

What's wrong with saying the gas motor has high torque at high speeds and
the electric motor has high torque at low speeds.  That makes acceleration
nice and smooth for us non educated mechanics.  (But happy Prius owners)


Posted by Bruce Richmond on May 3, 2012, 4:38 pm
 
On a CVT the CV part doesn't have gears since gear ratios give
definite steps.  There is usually a set of pullies where one has
variable width allowing the "belt" to move in or out to change the
ratio.  On some the "belt" is a stack of metal plates on a steel band
and it works in compression rather than tension.  The ratio can be
controlled mechanically or by computer.

On an eCVT the computer balances forces between the electric motors,
the ICE and the output.  The computer interperts the desires of the
driver based on the input at the gas peddal.  If that input is spastic
the engine could hunt do to the constantly changing requests.  Since
we aren't seeing the same complaint from others I would chalk it up to
operator error.

Posted by News on May 3, 2012, 5:00 pm
 On 5/3/2012 12:38 PM, Bruce Richmond wrote:

More likely folks enamored of shiny objects who overlook, or who don't
know or care enough to notice, the deficiencies.

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