A hybrid engine combines two power sources, typically an internal combustion engine and an electric motor. This setup allows vehicles to use fuel more efficiently, reducing emissions and improving fuel economy. When the vehicle starts or moves at low speeds, the electric motor often takes over, while the internal combustion engine kicks in for higher speeds or when more power is needed. Many modern cars, like the Toyota Prius, utilize hybrid engines to offer a balance between performance and environmental friendliness. By switching between or combining these power sources, hybrid engines help reduce reliance on fossil fuels and contribute to cleaner air.