You literally describe the setup in a Prius CVT here. You could run your ICE at peak torque RPM in standstill (all torque would go to the small electric motor/generator). Then you accelerate with all three motors in tandem, all the while keeping your ICE at peak torque over the whole speed range.
The Prius of course is not a track car, so instead you accelerate with just the electric motor and continue to use it until your battery gets low or more power is required. The the ICE is automatically started while driving.
The Prius of course is not a track car, so instead you accelerate with just the electric motor and continue to use it until your battery gets low or more power is required. The the ICE is automatically started while driving.