Hybrid Car – More Fun with Less Gas

70 mpg - Page 16

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Posted by Michael B on January 19, 2010, 11:57 am

I have some annoyance with the way some hybrids
are arranged. With my ICE, if the light a half mile
away has been green for the requisite time, I can
anticipate having to stop, so I push in the clutch
and drift to the site, with engine RPM at only 800.

But some of the hybrids kick in regenerative braking
as soon as you let up on the accelerator, not when
you first touch the brake pedal.

Far as I'm concerned, considerable fuel could
be saved with the automatic transmissions if
they were to kick out when the vehicle was not
moving, instead of having a bunch of cars trying
to go forward at a stop light or train.

Posted by Alistair Gunn on January 19, 2010, 12:55 pm

Michael B twisted the electrons to say:

From what I've *read* (ie: take this with as large a chunk of salt as
seems appropriate!), the Prius will kick in with mild regen as soon as
you lift off the accelerator and then feed in more regen (and eventually
the actual brakes) as you press the brakes.  However, if instead of
pressing the brakes you press the accelerator gently then you can cancel
that mild regen.
These opinions might not even be mine ...
Let alone connected with my employer ...

Posted by Daniel who wants to know on January 19, 2010, 7:26 pm

This is true and is the glide phase of the pulse and glide technique.
Pulsing is accelerating with no arrows to or from the battery on the energy
monitor screen and gliding is coasting with no arrows.

Posted by Josepi on January 15, 2010, 3:03 pm

You may be fooling yourself with inaccurate metering.

I find it hard to believe you could meter, accurately, the mileage over a 40
mile long trip. The consumption would be less than 2/3 US gal. I trust you
have a fluid meter in your gas line, your batteries shut off and a precision
level on your gas tank.

The other day I tried keeping the speed down around 40 to 50 mph for a
40 mile trip over secondary roads.  The Prius averaged 60 mpg.  I have
several motorcycles.  The one that gets the best mileage is a 1981 GPZ
550 Kawasaki.  At 55 mph it gets 55 mpg.  This 1972 BMW 750 only gets
about 15 mpg

Posted by Bruce Richmond on January 16, 2010, 3:11 am

The readout is linked to the fuel injection system which measures
exactly how much fuel it is injecting at all times.  It is very
accurate and agrees with what I get when I fill the tank.

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---> Re: 70 mpg Jim Wilkins01-03-2010
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| | `--> Re: 70 mpg Bruce Richmond01-16-2010
| |--> Re: 70 mpg Bruce Richmond01-17-2010
| |     ---> Re: 70 mpg Alistair Gunn01-19-2010
| |       `--> Re: 70 mpg Daniel who want...01-19-2010
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