美国新近发明了一种能提高发动机效率的载荷控制系统。这种装置在车辆加速时使发动机与交流电机脱开,而在减速或制动时再重新将它们接合,借此减小了加速时发动机的机械负荷,提高了燃油经济性,并降低了排放。而且由于该装置缩短了交流电机的 The United States recently invented a load control system that can improve engine efficiency. Such devices disengage the engine from the AC motor when the vehicle is accelerating and re-engage them during deceleration or braking, thereby reducing the mechanical load on the engine during acceleration, improving fuel economy and reducing emissions . And because the device shortens the AC motor