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Hydraulic braking system and intelligent moving vehicle

A hydraulic brake and brake pipe technology, applied in the direction of brake transmission, brakes, brake components, etc., can solve problems such as overload deformation, vehicle and driver danger, noise, etc.

Active Publication Date: 2019-06-07
UNIV FOR SCI & TECH ZHENGZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. The pressure provided by the pump increases with the increase of the stroke of the brake pedal, because the change of the braking force applied by the brake to the brake disc needs to be synchronized with the stroke of the brake pedal in time as much as possible (if The change of the braking force applied by the brake to the brake disc produces a large lag compared to the travel of the brake pedal, which will cause the braking of the vehicle to be delayed, which may cause greater danger to the vehicle and the driver), so in The valve device used to prevent pressure pulses cannot be installed on the brake pipeline (the valve device will generate relatively large resistance to the hydraulic oil and the pressure transmission of the hydraulic oil, so that the braking force implemented by the brake will lag behind), however, the pump is in During operation, especially in the process of increasing the pressure of the hydraulic oil, a large pressure pulse will be generated, which will cause the brake line and the components connected to it (such as the pump itself, the brake master cylinder) to generate jitter, noise
[0005] 2. The above-mentioned oil return pipeline is only used to release the pressure of the hydraulic oil after the brake is completed, and when the brake is applied, the energy carried by the above-mentioned pulse pressure and the energy that the pump may produce exceed the brake pedal stroke. The energy carried by the extra pressure other than the pressure is not only unusable, but also used to cause the above-mentioned vibration, noise and overload deformation (deformation of the brake disc and friction block caused by excessive braking force), etc.

Method used

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  • Hydraulic braking system and intelligent moving vehicle
  • Hydraulic braking system and intelligent moving vehicle
  • Hydraulic braking system and intelligent moving vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Such as figure 1 As shown, in this embodiment, the valve device 60 includes a second valve member 61, and a two-position two-way electromagnetic reversing valve is selected as the second valve member 61; The pressure of the hydraulic oil controls the on-off of the oil return pipeline 82 in a specific way: the brake pipeline 81 is provided with a pressure sensor 71 for real-time acquisition of the pressure in the brake pipeline 81, and the electronic control device 70 uses It is electrically connected with the pressure sensor 71 and electrically connected with the electric control port of the second valve 61, and the electronic control device 70 is configured to: after the electronic control device 70 controls the opening of the first valve 90, while the pump is running In the process of increasing the pressure of the brake pipeline 81, the electronic control device 70 acquires the pressure signal detected by the pressure sensor 71, and controls the opening and closing o...

Embodiment 2

[0073] Such as figure 2 As shown, in this embodiment, two branches 821 are formed on the oil return pipeline 82; the valve device 60 includes a third valve element 62 and a fourth valve element 63, and the third valve element 62 and the fourth valve element 63 are respectively Correspondingly arranged on the two branches 821, and a well-known flow control valve with a liquid control port (the opening of the flow control valve increases with the pressure of the hydraulic oil entering the liquid control port) is selected as the third valve. As the valve part 62 , a well-known two-position two-way electromagnetic reversing valve is selected as the fourth valve part 63 . In this embodiment, the hydraulic control port is connected to the brake pipeline 81 through the control pipeline 811 , the fifth valve element 64 is arranged on the control pipeline 811 , and a proportional pressure reducing valve is selected as the fifth valve element 64 .

[0074] In this embodiment, the elec...

Embodiment 3

[0080] In this example, if Figure 3 to Figure 9 , the valve device 60 includes a sixth valve member 65 . The sixth valve element 65 includes a valve body 651, a piston 653, a first spring 655, a valve core 654, a second spring 656 and a magnetic element 657. in:

[0081] The valve body 651 has a first end and a second end in the axial direction, and a piston cavity extending in the direction of both ends in the axial direction is opened in the valve body 651, and a plurality of circumferential Grooves 652 are arranged. Each groove 652 extends from the first end close to the piston chamber (the first end of the piston chamber is consistent with the first end of the valve body 651) to the second end of the piston chamber, and is formed in three sections in sequence, that is, the first A section 6521 , a second section 6522 and a third section 6523 , and the cross-sectional areas of the three sections increase sequentially.

[0082] The piston 653 is arranged in the piston c...

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PUM

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Abstract

The invention discloses a hydraulic braking system and an intelligent moving vehicle. The hydraulic braking system comprises a braking pedal, a braking main cylinder, a pump, a brake, a brake pipeline, an oil return pipeline, a first valve piece and an electronic control device; the brake pipeline is connected between the pump and the brake, the first valve piece is arranged on the brake pipeline,and the electronic control device is configured to be used for controlling opening and closing of the first valve piece; the hydraulic brake system further comprises a valve device; the oil return pipeline is connected between the brake and the pump to form a closed return circuit with the brake; and the valve device is arranged on the oil return pipeline and controls breaking-making of the oil return pipeline according to the pressure of hydraulic oil in the brake pipeline to at least be used for transmitting energy carried by pressure pulse to the pump in the pressure climbing stage of thehydraulic oil in the brake pipeline.

Description

technical field [0001] The invention relates to the technical field of braking of mobile vehicles, in particular to a hydraulic braking system. Background technique [0002] Moving vehicles, especially light-duty high-speed moving vehicles, such as family cars, usually use a hydraulic braking system to brake or park the vehicle. A hydraulic braking system provided in the prior art includes: a brake pedal, a brake master cylinder, a pump, a brake, a brake pipeline, an oil return pipeline, two valves and an electronic control device for controlling the valves. Among them, it can be seen that the brake master cylinder is linked with the brake pedal to obtain a braking stroke with reliable force feedback, and the brake is installed on the wheel hub to drive the friction block through the hydraulic cylinder on it to apply pressure to the brake on the wheel hub. The brake is implemented by moving the disc, and it can be seen that the higher the pressure of the hydraulic oil suppl...

Claims

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Application Information

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IPC IPC(8): B60T13/16B60T13/70B60T15/36
Inventor 饶美丽彭玉平叶冬李亚民杨瑞
Owner UNIV FOR SCI & TECH ZHENGZHOU