1. Initial Acceleration: When you start accelerating from a standstill or low speeds, the electric motor often provides the primary source of power. It delivers instant torque, giving the car a quick and responsive acceleration.
2. High-Speed Acceleration: As the car reaches higher speeds, the gasoline engine typically becomes the dominant source of power. However, the electric motor can still assist the engine during high-speed acceleration, providing additional torque and reducing the strain on the engine.
3. Engine and Motor Cooperation: In HEVs like the Prius, the gasoline engine and electric motor work together in a coordinated fashion to optimize fuel efficiency and performance. The engine and motor can operate simultaneously or switch between each other based on driving conditions and the power demand.
4. Regenerative Braking: When you release the accelerator pedal or apply the brakes, the electric motor can switch to regenerative braking mode. This converts the kinetic energy of the vehicle into electrical energy, which is stored in the hybrid battery for later use.
It's worth noting that different hybrid systems and models may have variations in how the electric motor and gasoline engine work together. However, the general principle of using the electric motor to assist during acceleration, regardless of speed, is common in many hybrid vehicles.