The invention discloses a flexible safety control device and method for electro-hydraulic steering of engineering machinery. The flexible safety control device comprises a first controller, an electric control handle, an electro-hydraulic steering unit, a steering oil cylinder and an electric control pump. The electric control handle is connected with the first controller and sends the steering request signal to the first controller, so that the first controller generates a CAN signal or a PWM signal; the electro-hydraulic steering unit comprises an electric control steering module and a reversing valve which are connected, the electric control steering module is further connected with the first controller through a CAN signal line and a PWM signal line, and the reversing valve is further communicated with a steering oil cylinder. The electric control pump is respectively connected with the first controller and the reversing valve; the electric control steering module responds to the CAN signal or the PWM signal sent by the first controller and outputs pilot pressure according to the CAN signal or the PWM signal to push the reversing valve to reverse. When the CAN signal line breaks down, the PWM signal line takes over the steering request signal, it is guaranteed that the vehicle continues to steer, and the steering safety of the vehicle is achieved.
本发明公开了一种工程机械电液转向柔性安全控制装置及方法,包括第一控制器、电控手柄、电液转向单元、转向油缸和电控泵;电控手柄与第一控制器相连,将转向请求信号发送至第一控制器,使得第一控制器生成CAN信号或PWM信号;电液转向单元包括相连的电控转向模块和换向阀,电控转向模块还与第一控制器分别通过CAN信号线和PWM信号线相连,换向阀还与转向油缸相连通;电控泵分别与第一控制器和换向阀相连;电控转向模块响应于第一控制器发送的CAN信号或PWM信号,并根据CAN信号或PWM信号输出先导压力,推动换向阀换向。本发明可以实现当CAN信号线出现故障时,PWM信号线接管转向请求信号,保证车辆继续转向,实现车辆转向的安全性。
Engineering machinery electro-hydraulic steering flexible safety control device and method
一种工程机械电液转向柔性安全控制装置及方法
2024-08-16
Patent
Electronic Resource
Chinese
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