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2010 Prius III fuel efficiency hypermiling results - Page 6

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Posted by Bruce Richmond on January 19, 2011, 5:31 am

LOL,  Sure you do,  In your dreams.  Ha Ha

Posted by News on January 19, 2011, 11:38 am
On 1/19/2011 12:31 AM, Bruce Richmond wrote:

Laugh it up.  Remember to drive it all the way through the crash.

Posted by Elmo P. Shagnasty on December 29, 2010, 12:51 pm
 In article

You're screwing yourself on this one.

The traction batteries are vented to the passenger cabin, because they
are designed to work best in the same environment as what's comfortable
for the passengers.

Leaving the AC and heat off is WORSE for the traction batteries.

Posted by Neo on December 31, 2010, 7:05 pm

Good Point- The Prius HV Traction battery does have an optimum
operating temperature and it  is cooled/heated by the
air drawn from the passenger cabin.   Heat can prematurely wear
out or destroy the Prius HV Traction battery.  Cold can reduce the
HV Traction Battery's output capacity.  The conditioned air from
the passenger cabin is part of the Prius's battery thermal management
system.  The Prius HV battery is suppose to operate between
5 C (41 F) degrees to 45 C ( 113 F) degrees with the optimum
temperature of 25 C degrees  (77 F).  I now have a new reason
to heat and cool the passenger cabin.


Posted by Neo on January 13, 2011, 3:00 am
 Tire Pressure

As some have predicted, I've finally experienced
some lost of tire tractrion from the increased tire
pressures at 48 psi front and 46 psi rear using
Yokohama Avid S33 all season tires that come standard
with the 2010 Toyota Prius III.  When attempting to
go from 35 mph to 0 mph on a wet 10 degrees downhill
grade on an asphalt road - the loss of traction added
approximately about 20 feet more to the stopping
distance. Because I normally start slowing down and
braking early ( to maximize energy recovery
via the regenerative brakes)  I noticed the loss in
braking performance early and I was able to easily
compensate for the loss of performance. Sadly the
48/46 psi tire setting has not provide any noticeable
fuel efficiency improvement than the 44/42 psi
setting.  I have since  reset the tire pressures
back to 44/42 psi setting which in the past improved
fuel efficiency but  still provided adequate level
of performance wrt to braking and handling in
urban/suburban driving environments..

Grill Blocking

The 100% grill blocking has reduced the number of
times the Prius turns on the ICE to keep the catalytic
converter/emissions system warm.  Sofar the coolant
temperature has stay more or less under 181
Fahrenheit degrees in mainly urban driving. For the
winter, grill blocking has been a significant factor in
keeping the FE up.  More effective than grill blocking
is to just to drive when the temperature is warmer,
e.g. drive in the afternoon instead of at night.

2010 Toyota Prius III, Blue Ribbon/Dark Grey, OEM floormats
Yokohama Avid S22 (front 44 psi, rear 42 psi)
ScangaugeII ( RPM, MPG/AVG, FWT, GPH)
lower grill 100% blocked, upper grill 100% blocked
DC/MD/VA metro area
odeometer = +7500 miles

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