Inversely-proportional pressure relief valve for vehicle integrated transmission box

A technology of inverse proportional valve and pressure reducing valve, applied in the field of pressure reducing valve, can solve the problems such as few varieties can not meet the pressure flow requirements, long supply cycle and so on

Active Publication Date: 2019-03-19
CHINA NORTH VEHICLE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are also some problems with the few inverse proportional pressure reducing valves, such as too few varieties to meet different pressure and flow requirements, long delivery cycle, etc.

Method used

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  • Inversely-proportional pressure relief valve for vehicle integrated transmission box
  • Inversely-proportional pressure relief valve for vehicle integrated transmission box
  • Inversely-proportional pressure relief valve for vehicle integrated transmission box

Examples

Experimental program
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Embodiment Construction

[0050] In order to better understand the present invention, the technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0051] Such as Figure 1 to Figure 4 As shown, an inverse proportional pressure reducing valve for a vehicle integrated transmission box provided in this embodiment includes: a valve body 6, a hydraulic pressure reducing valve 13 and an electro-hydraulic proportional pressure reducing valve 8;

[0052] The hydraulic pressure relief valve 13 is connected to the electro-hydraulic proportional pressure relief valve 8 and is arranged inside the valve body 6;

[0053] The hydraulic pressure relief valve 13 includes: an inverse proportional spool 2 and a spring 5 connected to each other;

[0054] The valve body 6 is connected with the fan clutch 14;

[0055] The spring 5 is used to make the output oil pressure Pf of the hydraulic pressure relief valve 13 inversely proportional to the p...

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PUM

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Abstract

The invention provides an inversely-proportional pressure relief valve for a vehicle integrated transmission box. The inversely-proportional pressure relief valve comprises a valve body, a hydraulic pressure relief valve and an electro-hydraulic proportional pressure relief valve; the hydraulic pressure relief valve is connected with the electro-hydraulic proportional pressure relief valve and arranged in the valve body; the hydraulic pressure relief valve comprises an inversely-proportional valve element and a spring which are connected mutually, the valve body is connected with a fan clutch,the spring is used for enabling the output oil pressure of the hydraulic pressure relief valve and the pilot control oil pressure of the electro-hydraulic proportional pressure relief valve to be ininverse proportion under the effect of the spring. According to the inversely-proportional pressure relief valve, the function of the electro-hydraulic proportional pressure relief valve is achieved,namely, the output pressure and a control current are in inverse proportion, the inversely-proportional pressure relief valve has the characteristic of inverse proportion, the output pressure of the proportional valve is maximum under the deenergized situation, and the output pressure of the proportional valve is minimum when the control current is maximum.

Description

technical field [0001] The invention relates to a pressure reducing valve, in particular to an inverse proportional pressure reducing valve used in a vehicle integrated transmission box. Background technique [0002] Most of the integrated transmissions of special vehicles have the function of driving fans, and cool down the engine and transmission through the fan cooling system. Among them, using a fluid viscous clutch to drive and control the fan is a relatively common driving method. The fan speed can be controlled by controlling the pressure of the fan fluid-viscous clutch. The higher the clutch pressure, the faster the fan speed; the lower the clutch pressure, the slower the fan speed. Therefore, an electro-hydraulic proportional pressure reducing valve should be used to proportionally control the pressure of the fan fluid-viscous clutch. The electronic control system sends a continuously changing electrical signal to the electro-hydraulic proportional pressure reduci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02F15B21/08F16K31/40
CPCF15B13/021F15B21/087F16K31/40
Inventor 顾宏弢李春明罗小梅韩颜莹潘嘉明
Owner CHINA NORTH VEHICLE RES INST
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