Hybrid Car – More Fun with Less Gas

Is Shudder Normal? - Page 3

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Posted by Bill on February 20, 2006, 5:12 pm

Huh?  The computer decided when to shut the engine off.  Fuel is metered to
meet demand.  You may be right about what causes (what sounds like) engine
overrun however the solution to the problem lies in Toyota's hands.
Besides, it usually happens to me when my engine is cold, not when it is

Posted by wieken on March 1, 2006, 11:25 pm
Does anyone really know how the car works?   I have contacted the
dealer and they have doubts about what is normal.  I also contacted
Toyota and asked to meet with one of their people and they say that
isn't possible.  That you must go to the dealer.  Sounds like the run
around to me.

What I would really like to know is if they shut off the engine using
the electrical or via the fuel supply.  It seems reasonable to me that
they would stop the fuel first by shutting off the fuel injectors, if
they are electric, if not it still should not diesel.  This is not good
for a gas engine.

The car is good, but not great.  The seats suck. That is where a person
spends most of the time.  I still can't understand why an auto company
wouldn't put in the best possible seats.  They also suck in my Lexus,
so Toyota keeps up the good work.  They must be designed for small

Posted by Michael Pardee on March 2, 2006, 1:29 am
Maybe that's it - my wife and I are both small and we love the seats.


Posted by The Central Scrutinizer on March 2, 2006, 7:04 pm
 Michael Pardee wrote:

I'm 6'3"  I think the seats are

  James A. Chappell | http://www.amon-hen.com/
  St. Louis, MO USA |

Hello, hello!  This is Monkey Wrench calling Bunny Hutch Headquarters...

Posted by dbs__usenet on March 2, 2006, 1:32 am
 wieken@gmail.com wrote:

The car's cycle is pretty well documented in the owner's manual.  What you
experience as "shudder" is probably not dieseling.  The engine is not only
elecrically controlled, it's fuel is metered and it's valves are computer
controlled.  On top of that, the ICE is also mechanically turned by one
of the two MGs (motor-generators) to provide the equivilents of gear ratios.

If, for any reason the engine does not stop turning as fast as the
computer expects you will have a little extra resistance that is not
counteracted by the MG.  This can cause a momentary shudder as everything
catches up.

It's really a miracle that it runs as smoothly as it does.  It has to
detect changes as they happen AND provide the appropriate power inputs
to keep it all in balance.

It's more likely that the "shudder" is caused by the engine stopping
one cycle earlier than the computer expects.

If it really bugs you, now is a great time to sell it.  You'll get your
money back at current resale prices.  Personally, my wife and I love
the seats.  We've driven up to 4,000 miles in a one week period.


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