Mechanical-electric-hydraulic system of moving vehicle

Abstract

The invention discloses a mechanical-electric-hydraulic system of a moving vehicle. The mechanical-electric-hydraulic system comprises a hydraulic drive closing system and a hydraulic brake closing system. The hydraulic drive closing system comprises an actuating device, a bidirectional hydraulic pump, a bidirectional hydraulic motor, a first work pipeline and a second work pipeline. The bidirectional hydraulic pump is a bidirectional variable pump for changing displacement through a tilting tray. The mechanical-electric-hydraulic system of the moving vehicle further comprises a brake detection device, a first adjusting mechanism and a control unit. The brake detection device is at least used for judging whether the hydraulic brake closing system forms braking to brake discs of walking wheels or not. The first adjusting mechanism is used for adjusting the tilting tray of the bidirectional variable pump so as to change the displacement of the bidirectional variable pump. The control unit is at least configured to control the first adjusting mechanism according to the detection result of the brake detection device, so that when the brake detection device judges that braking is formed, the control unit controls the first adjusting mechanism so as to reduce the displacement of the bidirectional variable pump.

Description

technical field [0001] The invention relates to the technical field of traveling and braking of a mobile vehicle, in particular to an electromechanical hydraulic system for controlling the traveling and braking of a mobile vehicle. Background technique [0002] In some mobile vehicles, for example, engineering mobile vehicles, the traveling wheels are usually driven by a hydraulic system and controlled by an electronic control system, and the traveling wheels are braked by the hydraulic system as an assist. [0003] All the above-mentioned components driving the road wheels and braking the road wheels constitute the electromechanical hydraulic system of the mobile vehicle. In the prior art, the part that drives the road wheels in the electromechanical hydraulic system constitutes a hydraulically driven closed loop, which includes an actuator (such as an electric motor, an internal combustion engine), a bidirectional hydraulic pump, a bidirectional hydraulic motor, and a firs...

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Problems solved by technology

[0009] 2. The above-mentioned high-pressure working pipeline, such as the first working pipeline, the hydraulic oil in it suddenly increases in pressure and produces an opposite torque to the torque of the actuating device, which causes the driving torque of the actuating device to increase to form an overcoming Opposite torque, this situation is harmful, the reason is that the driving torque of the actuating device increases during the braking process, which in turn increases the driving torque of the hydraulic motor driving the road wheels, which leads to the hydraulic brake closing system. The force cylinder in the brake caliper exerts more pressure on the brake disc to offset the increased driving torque, which makes the brake disc require greater braking friction, which in turn consumes more energy, and the consumed energy is ultimately Provided by the actuating device, this makes the moving vehicle consume extra energy during braking that is not used for braking and also results in poor braking

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