Prius (2010-12) Fuel :: Using EV Mode / ICE Is Not Very Efficient At Or Below 25 Mph
Nov 17, 2014
New to Prius. I have read everything I can find on getting better MPG and find different ideas about using EV. My car is a 2014. Most say DON'T use EV except to move the car or just before the ending of your trip.
My thoughts are the ICE is not very efficient at or below 25 mph. Why not use EV excelling from a stop? Or driving 20 mph anywhere? I notice my car goes electric below 45 mph using very light throttle on a level or slight down slope.
I haven't lifted my foot to force it there, just driving to go with traffic or maintaining speed. So some Toyota software engineer thought it best to use electric even if I'm doing 44 mph ???
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I've been driving an 2007 Prius unitl last week, when I upgraded to an 2010 model. I'm very happy with it so far.
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Well been playing with all the mode to see what they do and the one thing I have noticed is I get worst mileage under ECO Mode. Why it doing this.
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I've been hitting the EV switch to keep the car in EV mode for the first couple minutes. It kicks off at about 20 mph. It does let me get up to speed using EV mode so my hope is that will translate into higher fuel savings.
The default and Eco modes require starting up too slow while hitting EV lets me apply more power and faster acceleration. Wondering why Toyota didn't engineer that into the car though?
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In reading the manual, I note that it says to use the ECO mode when you're doing a lot of stop and start driving. Does that mean I should NOT use it on the interstate? My daily commute consists of 11 minutes start and stop to interstate, 11 minutes on interstate, and another 11 minutes of start and stop. My Prius is not quite a month old, so i am still learning.
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I searched but did not find a post about entering diagnostic mode of Prius 2010. Is that possible at all?
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Just bought a 2010 Prius IV and loving the car.
Minor annoyance, but wondering why it's so difficult to get the car to enter or stay in EV mode.
When I'm able to get into EV mode, it often beeps that it's leaving EV mode due to excessive speed, but I'm often doing barely 10 mph when this happens. I was under the impression that I could do up to 25 mph. Yesterday, I was floating at 8 mph and it said that was excessive speed.
More often, though, I can't even get into EV mode. It says "EV mode currently unavailable" and why. Doesn't matter if I'm not moving or if I'm driving slowly.
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It has been documented that the computer will let the ICE coolant cool to a lower temperature before mandating it to fire up again to maintain that lower limit.
Why isn't this done in other modes? Is this compromising anything when it comes to emission or engine protection? Since full power is available in ECO mode, one can force the ICE to drive with full output, even when it is a little cold.
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We have 2 trips coming up this summer (600 miles and 1400 miles), these will be my first long distance with the Prius.
Did anyone tested fuel economy using the cruise control in ECO vs NORMAL vs PWR ?
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Gen 3 .... Driving in Power Mode to obtain the best mileage? I find I am getting better mileage in Power Mode.
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This morning I was playing around with my 2010 Prius "B" mode - I realize today that when the Prius CVT is in "B" mode the Prius ICE won't turn off even when it is at a complete stop -- instead the ICE runs/idles at a 996 RPM / .20-.40 GPH while stopped in traffic. The coolant temperature (@190F ) doesn't matter, Battery State of Charge (54% soc) doesn't matter. To re-enable the stop-start idle technology - I had to switch the Prius CVT back to "D" mode. I end up burning a bit more fuel on this trip because it took me a while to realize that I was in "B" mode and that the stop start idle technology had disabled in the "B" mode ...
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I just got my new 2014 RX350 a few weeks ago. After these weeks drive, I feel the Brake is kind of soft and unsensitive.
When I braking, the first part of the brake pad feels soft and the braking is not very efficient, until I push a lot of the brake pad, the braking becomes confident and efficient.
I used to drive my 2006 Nissan altima , and feels the brake pad is very sensitive. My new lexus makes me a little bit unconfident when following a car in a short distance.
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I have a concern about my 2010 Prius V(five). I've noticed some issues lately that may all tie in to one big problem.
1. My ev mode will not work at all. My battery will be fully charged and not in "B" mode. Turning car off and on will not work.
2. Engine will not turn off when coming to stops. Mind you when the battery is above 3 lines.
3. Throttle response feels like it's in PWR mode(super sensitive) but the engine is leggy. If I floor it for a sec the RPMS are super slow to come down.
4. The Eco line is quick to go in PWR portion and I'm not pushing it any harder than I was before all of this started. It seems like when I push the gas it skips the electric and automatically pulls from the engine.
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Just filled up with Shell V-Power 91 Octane Fuel for the first time in my MKVI Golf 2.5
I know 91 isn't needed in this car but I like filling up with good fuel every once in a while.
After filling up my check engine light came on right away, also my engine wont allow me to go over 3k RPM.
Why did this happen and what can I do to fix it?
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Several time lately I've gotten in to go to work and the battery shows for half sometimes 3/4 of charge, but it will not go into EV mode. But I can be in town driving and it will go into EV mode with only 2 bars of charge. Whats up with that.
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My friend is an aggressive driver. After she drives there is a drop in the calculated mpg's by at least 2 mpg sometimes as much as 5. Would it be better for her to drive in POWER MODE not only for the mpg's,?
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I've been using the EV mode - the EV portion of the curve without pushing the EV button - to run around town and to maintain speed once I've accelerated to traffic speed. It really boosts the mpg numbers and I'm able to get 55-60mpg on my 47mi. Roundtrip mostly highway commutes (hills included). Without the running in EV it's probably 42-48mpg.
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I've been driving a bit different to try and get some more mpg. I will pulse up to about 45 then let off till ev kicks in and keep the bar right at the verge of going into ice. I can usually cruise at 40 mpg doing this on flat roads while only using the battery. Although if I'm able to do this ev mode for a long distance my battery runs down then the ice kicks in even with the bar below the ice line.
I'm still only getting 50-51 indicated mpg this way but much better than the 42mpg I got just driving it... My route has some hill and my tires are no lrr so I'm think that's has some to do with my low mpg.
Question is does driving 40 mph in ev mode till battery runs dead then recharge with ice just to run battery down again coasting with ev do any harm to the battery?
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While pulse and glide, is it better in Eco mode or normal mode with Prius c?
Eco mode will take more time to pulse, it may lower mpg?
Nexus 7 ?
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I've always been a little curious why the ICE receives fuel when going downhill in B-mode. I've noticed that at times (especially at lower speeds) going downhill in B-mode that the instantaneous consumption bar will be in the 30-50 mpg range at times that I don't think the engine would be receiving fuel if the system were in D-mode.
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In a cold weather also noticed the EV mode doesn't stay on for a long time even with a 90% full battery and fully warmed up. The engine starts to kick in randomly.
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