You&#x27;re talking about a series hybrid design? I.e combustion engine powers a generator which in turn powers electric drive motor(s), usually with a battery system to allow for buffering generator output and to capture power from regenerative braking.<p>For long distance highway driving, this is less efficient since you have losses between the generator and the electric motors. It can work well for mostly stop-and-go driving and is used in hybrid buses I believe.