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hydraulic control valve

A technology of hydraulic control valve and hydraulic chamber, applied in the field of hydraulic control valve, can solve problems such as fluctuation of operating characteristics of hydraulic control valve

Inactive Publication Date: 2017-03-01
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hydraulic lateral forces can cause fluctuations in the operating characteristics of hydraulic control valves

Method used

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Examples

Experimental program
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Effect test

no. 1 example

[0028] (Construction of the first embodiment)

[0029] The configuration of the hydraulic control valve 1 according to the first embodiment will be referred to Figures 1 to 8B describe. The hydraulic control valve 1 is configured to supply and discharge hydraulic fluid to and from the controlled object 2 to control hydraulic pressure in the controlled object 2 . The hydraulic pressure control valve 1 is included, for example, in a body 3 of an automatic transmission fitted to a vehicle to control hydraulic pressure to be applied to transmission elements. In this case, the transmission element is the controlled object 2 in which the hydraulic pressure is controlled.

[0030] The hydraulic control valve 1 is housed in a tubular cavity 4 formed in the body 3 and assembled to the body 3 . Chamber 4 communicates with supply port 6 , outlet port 7 and discharge port 9 . The supply port 6 is connected to a hydraulic pump as a supply source 5 of hydraulic fluid. The outlet port ...

no. 2 example ）

[0089] Such as Figures 9 to 11C As shown in , the hydraulic control valve 1 according to the second embodiment has two hydraulic chambers 28A and 28B. These two second hydraulic chambers 28A and 28B of the second embodiment are formed by dividing the second hydraulic chamber 28 of the first embodiment into two chambers. The second hydraulic chamber 28A is positioned on one side relative to the first hydraulic chamber 27 in the axial direction. The second hydraulic chamber 28B is positioned on the other side relative to the first hydraulic chamber 27 in the axial direction. A slot 40 extends axially on the upper surface of the sleeve 12 . The second hydraulic chambers 28A and 28B regularly communicate with each other through grooves 40 . That is, the second hydraulic chambers 28A and 28B open upward to the groove 40 through the intermediate ports 41A and 41B, respectively. The second hydraulic chambers 28A and 28B regularly communicate with each other through the groove 40...

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Abstract

A hydraulic pressure control valve is equipped to a cavity to control a communication state between a supply port and an outlet port to supply hydraulic fluid from the supply port through the outlet port to a controlled object. A tubular sleeve has a first port and a second port communicating with the supply port and the outlet port, respectively. A spool includes a land supported by the sleeve slidably in an axial direction to form a hydraulic chamber with an inner circumferential periphery of the sleeve. The spool is displaced in the axial direction to cause the land to control a communication state between the first port and the second port through the hydraulic chamber. A supply-side hydraulic passage is connected with the hydraulic chamber through multiple outflow holes to conduct hydraulic fluid from the hydraulic chamber through the second port to the outlet port.

Description

technical field [0001] The present disclosure relates to a hydraulic control valve configured to supply hydraulic fluid to and discharge hydraulic fluid from a hydraulically controlled object, thereby controlling hydraulic pressure in the controlled object. The controlled object may be, for example, a continuously variable transmission device. Background technique [0002] Generally, a hydraulic control valve is used, for example, in a body of an automatic transmission of a vehicle to control hydraulic pressure to be applied to components in the automatic transmission. The automatic transmission has a body including a tubular cavity to which a hydraulic control valve is fitted. The tubular lumen has a supply port, an outlet port and an exhaust port. The supply port is connected to a supply source of hydraulic fluid. The outlet port is connected to the hydraulic chamber of the controlled object. The discharge port is connected to a discharge destination of hydraulic fluid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B13/02
CPCF16K11/07F16K27/041Y10T137/86879
Inventor 平野明孝
Owner DENSO CORP