G
Guest
·To help inform future discussion, I have done another test of my
Prius' "EV" mode. Some values here are guesses (reasonable ones,
I hope) or are "roughly" where I could not obtain readings.
* The car is a 2005 UK-spec "T4" model Prius, unmodified in ways
liable to affect performance. (Eg, it has floor mats.) Seems to
be in good condition. This model has "EV" (Electric Vehicle)
mode. When engaged, by pressing a button, dashboard icon lights
and car tries not to use petrol engine (limited by battery state
and effort/speed being asked of car).
* Weather: 7C (44.6F), overcast + enough drizzle to warrant the
wipers on "slow intermittent". Good visibility.
* Wind: Rain drops were falling at an angle to the vertical of
20-25deg. Assuming 25deg (for worst case) and that drops were
moving sideways at same speed as wind and that terminal speed was
20mph, wind speed would be 20 * sin(25), or about 8.5mph -- not
fast enough to worry about here.
* The Course: A local road, more or less level but with gentle
curves and local undulations (worst gradients 1:100). Reasonable
surface but not truly "flat", except for last 100yards. Lack of
other traffic allowed car to run without halting.
* Battery: At start, main battery showed 6/8 charge. I do not
know whether this was "barely 6/8" or "almost 7/8". (Datum: main
battery never seems to reach 8/8 -- display turns green where 7/8
might become 8/8.)
* The Method: I drove the car, from cold, some two miles to the
Course. Pulled over and switched off all electrical loads except
wipers. Reset trip meter (which measures in 1/10 mile). Pressed
"EV" button: dashboard icon lit. Moved off gently and speeded up
to 17-20mph, never exceeding displayed 20mph. After car had gone
1.0 miles, charge was 2/8. EV icon began blinking and dashboard
sounded some "pips"; then car cancelled EV mode and switched back
to normal mode.
* FWIW: within a further 6 miles of unstressed steady driving at
50-55mph the battery was back to 6/8.
HTH.
--
Andrew Stephenson
Prius' "EV" mode. Some values here are guesses (reasonable ones,
I hope) or are "roughly" where I could not obtain readings.
* The car is a 2005 UK-spec "T4" model Prius, unmodified in ways
liable to affect performance. (Eg, it has floor mats.) Seems to
be in good condition. This model has "EV" (Electric Vehicle)
mode. When engaged, by pressing a button, dashboard icon lights
and car tries not to use petrol engine (limited by battery state
and effort/speed being asked of car).
* Weather: 7C (44.6F), overcast + enough drizzle to warrant the
wipers on "slow intermittent". Good visibility.
* Wind: Rain drops were falling at an angle to the vertical of
20-25deg. Assuming 25deg (for worst case) and that drops were
moving sideways at same speed as wind and that terminal speed was
20mph, wind speed would be 20 * sin(25), or about 8.5mph -- not
fast enough to worry about here.
* The Course: A local road, more or less level but with gentle
curves and local undulations (worst gradients 1:100). Reasonable
surface but not truly "flat", except for last 100yards. Lack of
other traffic allowed car to run without halting.
* Battery: At start, main battery showed 6/8 charge. I do not
know whether this was "barely 6/8" or "almost 7/8". (Datum: main
battery never seems to reach 8/8 -- display turns green where 7/8
might become 8/8.)
* The Method: I drove the car, from cold, some two miles to the
Course. Pulled over and switched off all electrical loads except
wipers. Reset trip meter (which measures in 1/10 mile). Pressed
"EV" button: dashboard icon lit. Moved off gently and speeded up
to 17-20mph, never exceeding displayed 20mph. After car had gone
1.0 miles, charge was 2/8. EV icon began blinking and dashboard
sounded some "pips"; then car cancelled EV mode and switched back
to normal mode.
* FWIW: within a further 6 miles of unstressed steady driving at
50-55mph the battery was back to 6/8.
HTH.
--
Andrew Stephenson