电子油门系统是指在原有油门系统基础上进行改进把原来由线控节气门改成由步进电机驱动的电子节气门。其它结构基本不变。
电子油门用继电器取代了连接油门踏板和油门的机械装置。已被汽车行业普遍使用的电子油门系统可以降低汽车重量，减少汽车油耗。
Electronic throttles replace mechanical links between the gas pedal and the throttle with electronic relays. The systems, used widely in the industry, reduce vehicle weight and fuel waste.
但是律师，汽车安全的支持者以及消费者仍持续提出对丰田汽车电子系统的质疑，而这极有可能造成汽车油门的失灵。
But lawyers, safety advocates and consumers continue to raise questions about the cars' electronic systems, which they say could cause a car's throttle to stick.
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