A hybrid engine combines two power sources, typically an internal combustion engine and an electric motor. This design allows the vehicle to use either power source independently or together, improving fuel efficiency and reducing emissions. Hybrid engines are commonly found in hybrid vehicles, which aim to provide a balance between performance and environmental impact. The electric motor in a hybrid engine can assist the internal combustion engine during acceleration or operate alone at low speeds. This system can recharge the electric motor's battery through regenerative braking, where energy is captured during braking and used to power the vehicle later.