CMF Senior Member
Join Date: Nov 2016
Location: S.E. Wisconsin, U.S.A.
Re: Hybrid CVT issues down hill?
What everyone has said here is true: this is normal operation. Everyone freaks out the first time they experience it (I sure did), but it's fine. When running downhill in L1, or even L2, once the HV battery is fully charged, the ECU will mechanically engage the ICE as a braking device (if it isn't already engaged). When running in this mode, I assume the ECU diddles the cam phasing to maximize the braking effect of the otherwise-dead (no spark, fuel, etc.) engine, and it's just going to sound and feel differently because the wheels are spinning the engine (at 2.6 times wheel speed) instead of the engine running normally and spinning the wheels as usual.
Oh, and just FYI, this car doesn't have a CVT. The electric motors and the ICE provide the variable speeds of the car, not the transmission(which only has one fixed ratio).
'17 Malibu Hybrid
'17 Volt LT
Bose, Comfort, Protection,
Lighted Charge Port
Last edited by Dr. Manhattan; 04-01-2019 at 07:45 PM.