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Electromagnetic valve pressure buffering device and pressure buffering method

A buffer device and solenoid valve technology, applied in fluid pressure actuation devices, valve devices, valve operation/release devices, etc., can solve problems affecting shift quality, output oil pressure fluctuations, and clutch service life, etc., to achieve Wide applicability and the effect of improving stability

Active Publication Date: 2020-05-08
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above analysis, the present invention aims to provide a solenoid valve pressure buffer device and a pressure buffer method to solve the problem that the output oil pressure of the existing solenoid valve will fluctuate. If the oil pressure fluctuation cannot be reduced or eliminated, it will affect the electrohydraulic The output pressure of the control circuit will affect the quality of shifting, and even affect the service life of the clutch

Method used

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  • Electromagnetic valve pressure buffering device and pressure buffering method
  • Electromagnetic valve pressure buffering device and pressure buffering method
  • Electromagnetic valve pressure buffering device and pressure buffering method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A specific embodiment of the present invention discloses a pressure buffer device for a solenoid valve, comprising an upper valve cover 2.3, a steel gasket 2.2 and a lower valve cover 2.1.

[0042] figure 2 It is a structural schematic diagram of the pressure buffer device 2 of the present invention. Specifically, the upper bonnet 2.3, the steel gasket 2.2 and the lower bonnet 2.1 are arranged in order from top to bottom, and together constitute the electromagnetic valve pressure buffer device of the present invention, and the upper bonnet 2.3, the steel gasket 2.2 and the lower bonnet The bonnet 2.1 is fixed as a whole by the first bolt 2.4, such as figure 2 shown.

[0043] That is to say, the first bolt 2.4 passes through the upper valve cover 2.3, the steel gasket 2.2 and the lower valve cover 2.1 in turn, and the upper valve cover 2.3, the steel gasket 2.2 and the lower valve cover 2.1 are fixed by tightening the first bolt 2.4 One.

[0044] Further, the first...

Embodiment 2

[0070] The shape of the damping oil passage 2.3.1 in Embodiment 1 can be linear or as Image 6 The bent shape shown.

[0071] Alternatively, the damping oil passage 2.3.1 is designed in a T shape and has three branch oil passages, including a first damping oil passage, a second damping oil passage and a third damping oil passage. Wherein, the two ends of the first damping oil passage and the second damping oil passage respectively communicate with the first damping hole 2.2.1 and the second damping hole 2.2.2, realizing communication with the solenoid valve 1 and the accumulator. The end of the third damping oil channel is used as the movable end, and the movable slider is sealed, and the movable slider can move in the third damping oil channel of the damping oil channel 2.3.1, adjust the length of the damping oil channel 2.3.1, and finally realize the The adjustment of the damping pressure buffering effect of the damping oil passage 2.3.1 makes the pressure buffering device ...

Embodiment 3

[0073] This embodiment provides a pressure buffering method, using the solenoid valve pressure buffering device of Embodiment 1, when the solenoid valve 1 is working, the oil will enter the damping oil passage 2.3.1 through the first damping hole 2.2.1, and then pass through the second The second damping hole 2.2.2 enters the accumulator, and as the oil pressure rises, the spring 2.9 in the accumulator will be compressed by the valve core 2.10, and pass through the first damping hole 2.2.1 and the damping oil passage 2.3. 1. The second damping hole 2.2.2 and the accumulator perform pressure buffering; when the solenoid valve is powered off, the oil in the accumulator is released first, and flows back to the oil tank 5 from the oil discharge port of the solenoid valve 1. During the experimental test, a pressure sensor can be installed to test the pressure change in the working chamber.

[0074] When the solenoid valve 1 is working, the pressure buffering process of the buffer d...

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Abstract

The invention relates to an electromagnetic valve pressure buffering device and a pressure buffering method, belongs to the field of transmission electro-hydraulic control. The problem of fluctuationof output oil pressure of an electromagnetic valve caused by influence of the electromagnetic valve or an external environment in the prior art is solved. The buffering device comprises an upper valvedeck, a lower valve deck and a steel gasket between the upper valve deck and the lower valve deck; and two damping holes are formed in the steel gasket, the electromagnetic valve is arranged on the lower valve deck, hydraulic oil flowing out of an oil outlet of the electromagnetic valve flows into a damping oil channel of the upper valve deck through the first damping hole and flows back into anenergy accumulator in the lower valve deck through the second damping hole, a valve element of the energy accumulator pushes a spring in the energy accumulator to be compressed, and the damping oil channel and the energy accumulator form a buffering branch to be connected with a load branch in parallel to buffer the fluctuation of the output oil pressure of the electromagnetic valve. According tothe buffering device, when hydraulic oil input into the electromagnetic valve generates pressure fluctuation, buffering adjustment of fluctuant oil pressure can be achieved, so that the stability of asystem is kept.

Description

technical field [0001] The invention relates to the technical field of electro-hydraulic control circuits, in particular to a pressure buffer device and a pressure buffer method for an electromagnetic valve. Background technique [0002] At present, whether it is a hydromechanical automatic transmission or a dual-clutch automatic transmission, the combination or separation of the clutch / brake is realized through electro-hydraulic control. Some clutches / brakes use solenoid valve direct-acting electro-hydraulic control circuits, and some use electro-hydraulic control circuits with solenoid valves as pilot control valves. [0003] No matter what kind of electro-hydraulic control circuit, when the solenoid valve is affected by itself or the external environment, the output oil pressure of the solenoid valve will fluctuate. If the fluctuation of oil pressure cannot be reduced or eliminated, the output pressure of the electro-hydraulic control circuit will be affected. To affect,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K31/06F15B1/02F16H61/30
CPCF15B1/021F16H61/2807F16H61/30F16K31/06
Inventor 席军强任延飞陈慧岩
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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