机械式自动变速器的挡位检测与控制

Shift Detection and Shift Control of Automated Mechanical Transmissions

通过改造传统的机械式变速器 (手动变速器 )使其实现自动换挡 ,需要传感器对挡位进行检测 ,利用执行机构对挡位进行控制。提出了一种利用非接触式光电开关检测挡位的方法。对于 5挡变速器 ,分别利用 2个开关检测 3个选挡位置和 2个开关检测 3个换挡位置。通过对检测到的开关信号进行合理的编码 ,就能利用 4个光电开关实现对 5挡变速器的 9个挡位位置的检测。这种方法不仅使挡位检测的开关个数减少 ,硬件开销少 ,而且进行挡位控制的控制程序极其简单。

The conventional mechanical transmissions can be retro fitted to carry out the gearshift automatically.Their shifts must be detected by the sensors and controlled by the actuators.The method in detecting the shift with non contacted photoelectricity elements is proposed.For 5 speed gearboxes,two photoelectricity elements are used to detect three gear selecting positions,the other are used to two detect three gear shifting positions.The appropriate arrangement of switch inputs can make the nine shifts of a 5 speed gearbox be detected by four photoelectricity elements.Therefore the necessary switch numbers decrease,the necessary hardware is more simple and the control software is easy.The principle of shift detection and the program flow chart of shift control are given.