Final answer:
Auxiliary fuel pumps in vehicles can be electrically or engine-driven, with each type performing the function of transferring fuel. Car power systems range from traditional internal combustion engines to experimental fuel cell technology.
Step-by-step explanation:
The question is about the auxiliary fuel pumps used in vehicles. These pumps can be electrically driven, meaning they operate on electric power, or engine-driven, which indicates they are powered by the vehicle's internal combustion engine. For example, some systems, such as power brakes in construction machinery like bulldozers, have a motorized pump that performs most of the work.
In the context of car technology, internal combustion engines play a key role in powering vehicles by burning fuel. However, innovations such as the Toyota Fuel Cell Hybrid Vehicle utilize a fuel cell that generates electricity from hydrogen and oxygen. The vehicle's drive mechanisms can include a clutch and gearbox setup, electric motors, or a chain drive, all of which transfer the power generated to achieve motion.