with a large output of the engine speed relationship as the speed increases, the power of the engine is correspondingly increased, but to a certain speed after power but declined. Thus, corresponding to the engine maximum power speed at maximum power speed referred to. General instructions for use in the car speed units with r / min expressed as the maximum power of 100ps / 5000r / min, i.e., at 5000 revolutions per minute maximum output power of 100 hp.
rotational speed when the engine maximum power than passenger cars or trucks, in order to accommodate high-speed traveling which requires . Usually the maximum power speed models are about 5000-8000 r / min, the maximum engine power be lower, probably between 3000-5000 r / min.