Energy Consumption in Drive/Hold vs. Park

[WATT TF]

This morning I noticed a small white dash on my energy consumption meter after switching from park to drive without pressing the accelerator or the car moving. This continued during my commute to work - switching to P resulted in no consumption, but shifting back to D caused the minor consumption to reappear as if my foot were lightly pressing the accelerator.

Is this measuring the amount of energy used from the car attempting to "creep"?

 

[derotam]

When in Park, the car does not use the energy usage to calculate the Wh/mile metric. That is only updated when you are in Drive/Hold. Also, that energy bar is also only related to Drive/Hold usage.

 

[WATT TF]

I think you answered my question - I was confused how there could be an energy bar at all when the car is stationary at a stop light. But it sounds like this is normal.

 

[remlemasi]

I believe it's because the Hold function uses the motor to apply torque to the wheels to counter the gravity pulling the car forwards or backwards (assuming you're on a road with a non-zero grade).

Park uses the parking/emergency brake to hold the vehicle in place. No additional energy required once the pads are squeezed in.

 

[WATT TF]

I did a poor job explaining my situation - if I'm driving down a level road at 20mph and let off the accelerator, the car will regen to about 5mph at which point I must use the brakes to stop. This is displayed on the energy bar as green for regen and no bar (usage or regen) while braking.

Whats odd is I go from no energy usage/regen when braking from 5mph to 0mph, but as soon as the car stops I see a small amount if consumption on the energy bar. I used hold for the photo to emphasize the fact that the car is not moving. Switching to park results in the consumption bar going back to 0. It returns to minor consumption after changing back to Drive.

 

[gavine]

Could be the battery heater. Perhaps the heater turns-off once you put it in park? Does it still do this after the battery has warmed-up?

 

[Runebane]

It could be creep mode. I don't remember seeing a small white bar when in hold mode and I have creep mode off. I'll have to check when I go to lunch... if I remember

 

[Big Earl]

9F... looks like it's trying to warm itself up.

 

[WATT TF]

I agree with all of your remarks and suspected some of the same scenarios.

I interpreted the white bar to measure the accelerator pedal similar to a tachometer, not necessarily the entire car's instant usage.

I first noticed this when parking in my garage last night. When I went back out to take a second look the bar no longer existed when in Drive but not moving. After a quick ride around the garage the bar was back when in Drive but stationary.

 

[jsmay311]

When in Park, the car does not use the energy usage to calculate the Wh/mile metric. That is only updated when you are in Drive/Hold. Also, that energy bar is also only related to Drive/Hold usage.

This is it.

When in Park it’s likely still using the same power for cabin (and maybe battery) heating, but it just doesn’t show that power consumption in the bar because you’re in Park. Has nothing to do with creep.