Transmission: Engine Revving During Braking

[ct1958]

When slowing down on a gentle decline (1.5%- 3%) the engine will rev at 2400 RPM. This is while my foot is on the brake. I do not drive with both feet.
This does not happen on steeper inclines. Has anyone else experienced this?

 

[jayce]

My feeling is that the ECU tries to figure out if you need engine braking or not. It is a bit mysterious to me what triggers it. But I have been able to get it to engine brake by applying the regular brakes, releasing, and then applying again, even on steep slopes. If anyone else has figured out a magic combination of steps I’d be curious to hear it.

 

[ct1958]

Do you encounter the engine revving?

 

[jayce]

Yes, the engine is revving because it is mechanically connected to the wheels via the transmission, and is being driven to higher rpm’s due to the downhill acceleration force.

 

[ct1958]

Thank you