GM Volt Forum banner

1 - 6 of 6 Posts

·
Registered
Joined
·
2 Posts
Discussion Starter #1 (Edited by Moderator)
Hi - I know it's not a problem to drive in L while on electric, but can I cruise in L on the freeway when driving in gas only?

Are there "gears" such that I am revving the car too high? Don't know how the gears work on the car, so any insight would be helpful!

Thanks
 

·
Moderator
Joined
·
8,680 Posts
Hi - I know it's not a problem to drive in L while on electric, but can I cruise in L on the freeway when driving in gas only?

Are there "gears" such that I am revving the car too high? Don't know how the gears work on the car, so any insight would be helpful!

Thanks
Won't cause any problems. L just calls for more regen - it doesn't change the operating rpm for the engine or drive motors at all.
 

·
Super Moderator
Joined
·
6,278 Posts
Hi - I know it's not a problem to drive in L while on electric, but can I cruise in L on the freeway when driving in gas only? ...
Also, it is really nice that the car 'brakes' immediately when you let up on the accelerator (or hit '-' on the cruise control).
 

·
Registered
Joined
·
3,184 Posts
D & L simply tell the computer how much regen you want to use when not on the throttle. The labels are holdovers from ICE automatic transmissions where they would actually change the set of internal gears being used. A better set of labels would be C and B for [engine] Coast and [engine] Brake.
 

·
Registered
Joined
·
1,639 Posts
"D" and "L" aren’t gear settings, they are regen level settings. You don’t "drive" in Low, you "slow down" in Low... D and L are settings for determining how aggressively you want your Volt to reduce your momentum whenever you take your foot off the accelerator... do you want the car to "coast" in D (relatively light regen) or do you want to quickly reduce your Volt’s momentum by engaging the stronger L-level regen each time you take your foot off the accelerator?

Regenerative braking is an alternative to friction braking in a Volt, and it doesn’t matter if you are driving in Electric Mode using battery power or in Extended Range Mode using gas... once regen puts power into the battery, however, the distance you drive on that regen battery power will be classified under the driving mode you were in when you created it... driving downhill in Hold Mode or with a fully depleted battery will give you regen-battery-powered Gas Miles once you reach the bottom of the hill and start using that regen. If you drive down the same hill in Electric Mode, the regen-battery-powered miles will be recorded as Electric Miles.

On the highway you may, of course, simply "ease up" on the throttle without fully invoking D or L (for example, you just accelerated to pass someone and have now moved back into the driving lane and are slowing back down to that speed)... with a Gen 1 Volt, easing up on the throttle lowers the amount of fuel supplied to the motor to the amount needed to maintain the slower speed, and the car will slow down to that speed with no regen created. With a Gen 2 and its two planetary gear system, when you ease off the throttle, MGB may apply negative torque (i.e., regen) while propulsion torque is still being applied to the wheels by MGA and/or the engine. GM engineers have apparently determined that under certain Gen 2 driving conditions, using regen to slow the car while continuing to provide propulsion torque to the wheels sufficient to keep the car moving at a slower speed puts a small amount of power back into the battery and increases overall efficiency.
 

·
Registered
Joined
·
3,590 Posts
Trick question : How do you know when the Volt is running on electricity.
All the time it is on.
Old answer was : if you see it moving

The some forum member put it in N and truned it off going down a hill.


--------------
R is for going backward or if you need the backup camera if going forward :)
 
1 - 6 of 6 Posts
Top