现代汽车电子巡航控制系统的原理及实现

The Principle and Implementation of Cruise Control System

汽车电子巡航控制系统是一种在现代汽车上采用的电子设备 ,当按照驾驶员所要求的速度闭合开关之后 ,不用踩油门踏板就可以自动地保持车速 ,使车辆以固定的速度行驶。采用这种装置 ,可以减轻驾驶员的疲劳 ,改善汽车的燃油经济性和发动机的排放。巡航控制系统通过车速传感器 ,将车速信号输入发动机控制微机 ,由微机控制真空系统工作。系统中的电子控制装置可以根据行驶阻力的变化 ,自动调节发动机油门开度 ,使车速保持恒定。文中介绍了汽车电子巡航控制系统的功能和优点 ,分析了巡航控制系统的工作原理 ,并介绍了巡航控制系统的一种实现方法。

Cruise control system is a kind of electronic device installed in modern vehicles. When the switchgear is closed at the required speed set by driver, the vehicle would maintain the speed automatically and it is unnecessary for the driver to press on the accelerator pedal, thanks to which the driver is somewhat relieved from tiredness and such parameters as fuel economy and engine emission are improved. Through speed sensor, the cruise control system inputs speed signals into engine control computer, which controls the operation of vacuum system accordingly. In such a system, electronic control device is able to automatically adjust, according to changes of driving resistance, the accelerator’s release and the speed of vehicle is thus maintained. This article briefly introduces the functions and advantages of cruise control system, and its working principle as well. In addition, a method to implement cruise control system is suggested.