| − | There are many different types of hybrids, including parallel and series hybrids. In a parallel hybrid, the internal combustion engine powers the wheels, and is boosted by the electric motor. This is the most common type. In a series hybrid, the internal combustion engine serves as a electrical generator, and the electric motor drives the wheels alone. | + | There are many different types of hybrids, including parallel and series hybrids. In a parallel hybrid, the internal combustion engine powers the wheels, and is boosted by the electric motor. This is the most common type. In a series hybrid, the internal combustion engine serves as an electrical generator, and the electric motor drives the wheels alone. |