Question

While discussing HEV's: Technician A says that in a series hybrid, the engine is only used to power a generator to recharge the batteries. Technician B says that in a parallel hybrid, the engine always supplies some of the power to move the vehicle. Who is correct?

Answer 1

Both technicians are correct; a series hybrid uses the engine only for generating electricity, while a parallel hybrid uses the engine to directly power the vehicle, sometimes in conjunction with an electric motor.

Step-by-step explanation:

Both Technician A and Technician B have provided correct statements about the operation of hybrid electric vehicles (HEVs). In a series hybrid, the gasoline engine is not directly connected to the drivetrain that moves the vehicle. Instead, the engine operates a generator to produce electricity, either charging the batteries or powering an electric motor that drives the vehicle. Therefore, Technician A is correct. On the other hand, in a parallel hybrid, the vehicle can be powered by the engine, the electric motor, or both simultaneously. This means that the gasoline engine does at times supply power directly to the vehicle's wheels along with the electric motor, supporting Technician B's statement.