Mechanical-hydraulic differential steering control device and method of use

Abstract

The invention discloses a mechanically-hydraulic differential steering control device and a using method of the mechanically-hydraulic differential steering control device. According to the mechanically-hydraulic differential steering control device, a motor output shaft is connected with one end of a worm, the worm on a worm-wheel shaft is meshed with a worm wheel, and a primary gear which is meshed with a secondary gear is arranged on the worm-wheel shaft in a sleeving mode; a gear shaft is fixedly sleeved with the secondary gear and a variable pump tiling disc. The using method of the mechanically-hydraulic differential steering control device comprises the following steps that after an electronic control unit receives a steering wheel turning signal, whether a middle-position adjustment switch is turned on or not is judged; if the middle-position adjustment switch is turned off, a response is given to a steering wheel turning request, and whether a vehicle is in the parking gear is judged; if the middle-position adjustment switch is turned on, middle-position correction is conducted, if the condition is met, the electronic control unit controls a motor to work till the rotating speed acquired by a left wheel speed sensor and the rotating speed acquired by a right wheel speed sensor are consistent, and finally middle-position correction is ended. According to the mechanically-hydraulic differential steering control device, the motor, the worm and gear and the gear are controlled through the electronic control unit to rotate, then the degree of opening of the variable pump tiling disc is controlled and adjusted, and in this way, the variable pump tiling disc can be made to return to the middle position effectively.

Description

technical field [0001] The invention belongs to the field of vehicle steering control, and in particular relates to a mechanical-hydraulic differential steering control device. Background technique [0002] Automobile steering system is a special mechanism used to change or maintain the direction of the vehicle. Its function is to change the direction of the vehicle according to the will of the driver during the driving process of the vehicle. According to the different steering methods, it can be divided into two categories: track steering and differential steering. [0003] At present, most of the known differential steering vehicles adopt mechanical hydraulic power steering: that is, the engine converts part of the mechanical energy output by the variable pump into hydraulic energy. By adjusting the opening of the swash plate on the variable pump, the hydraulic oil flow is changed. Then the hydraulic energy is converted into mechanical energy by the steering motor and ou...

AI Technical Summary

Problems solved by technology

[0004] In the actual use process, due to the influence of factors such as too long cable, length change caused by cable fatigue, and errors in the return device, the variable pump swash plate cannot be effectively returned to the neutral position, which makes the vehicle unable to drive in a straight line. And when reversing, the actual turning direction of the vehicle is opposite to the direction of rotation of the steering wheel, which will affect the handling of the vehicle.

In addition, the driver is more laborious when turning the steering wheel, and the operation intensity is high.

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