Hybrid Car – More Fun with Less Gas

How to get Better Gas Mileage - Page 2

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Posted by Elmo P. Shagnasty on June 4, 2007, 2:24 pm

not NEARLY as much as a self-absorbed hypermiler who doesn't give a shit
about living in the REAL world full of other people in traffic.

Posted by notachance on June 2, 2007, 12:41 am

I think you're right, but there's another technique that lets
you keep your eyes on the road.

Simply keep your foot off the -- -- brake.

Drive in such a manner as to minimize brake usage, and your
mileage will improve significantly. The conversion of kinetic
energy to electricity is very inefficient (better than nothing),
but the conversion of kinetic energy to heat is a total waste.

That concept allows brisk acceleration when there's nothing in
front of you, but it also means long/gradual slowdowns when
something is. Applying this idea, you tend to look further down
the road, and I think it adds a bit of safety as well as economy.

mark b wrote:

Posted by Elmo P. Shagnasty on June 2, 2007, 1:48 am

Which is EXACTLY why Toyota designed the Prius with brake-by-wire.

The brake pedal tells the car how much to kick in the generators, which
provides the braking power.  Braking the car uses the more efficient
kinetic energy to electricity conversion.

Two exceptions to this:

1) the car does engage the mechanical brakes below 7mph (all those funny
noises you keep hearing under the hood during normal driving involve,
among other things, the brake accumulator pressurizing)

2) emergency stops--the car knows when to apply the mechanical brakes
regardless (see brake pressure accumulator concept above).

That the Prius drives like a normal car becomes more and more amazing as
you delve into how it all is designed and works in daily use.

They started with a goal--minimize inefficiencies.  With some thought,
they managed to do just that.  And they'll tweak things as time goes

Posted by zonie on June 2, 2007, 2:44 am

You can get the best mileage by leaving the Prius home and walking to work.
That way the rest of us can get there also. Scott

Posted by Michelle Steiner on June 2, 2007, 6:28 am

Coasting also regenerates the battery.  And coasting as far as you can
uses less gas than keeping up speed and then braking hard.

Support the troops:  Bring them home ASAP.

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