I posed this question to Volt owner’s in another thread, but it got lost in other topics in that thread. So, I’ll ask again in the hope of getting more answers from Volt owners.
When the ICE is running in Charge Sustaining mode there are low and high speed modes of operation. At low speed, the ICE provides torque to the generator only. At high speed, various clutches open and close to redirect some of the ICE’s torque to the ring gear. The net result is lower traction motor speed and generally higher efficiency. And, of course, this also means that the Volt’s ICE is actively and mechanically contributing to the supply of torque to the Volt’s wheels (via clutches and gearing and other intermediary devices).
When this mode change occurs there are clutches opening and closing, both motors and the ICE changing speeds, and motors and ICEs being reconnected while potentially running at different speeds. I'm wondering if that feels like some kind of transmission shift.
My question to Volt owners is: What have you felt?
When I originally asked this question, I did get one interesting answer from RUSTY, which I’ll repost next.
Note: When I say "both" motors, I mean the traction motor and the motor/generator.