This is how hybrids work at low speeds. They use 2 motor/generators - 1 to push the wheels, and the other to refill the batteries.

Most hybrids use a slightly different engine, which is more efficient but generates less force. The hybrid transmission can add torque when accelerating or going uphill.

The engine must get less wear. My Camry Hybrid only needs an oil change every edit: 10,000 miles.