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EGR valve

A technology for EGR valves and valve stems, which is applied to valve details, valve devices, and non-fuel substances added to fuel, etc., which can solve problems such as poor sealing of sealing components, and achieve the effect of improving sealing performance

Active Publication Date: 2015-06-17
AISAN IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, there is a possibility that foreign objects and deposits may rise up and bite into the lip of the sealing member, resulting in poor sealing of the sealing member.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] Hereinafter, an embodiment in which the EGR valve of the present invention is embodied will be described in detail with reference to the drawings.

[0024] exist figure 1 In , the EGR valve 1 when fully closed is shown by a front sectional view. exist figure 2 In , the EGR valve 1 when fully opened is shown by a front sectional view. The EGR valve 1 is provided on an EGR passage for returning a part of exhaust gas (EGR gas) discharged from the engine to the intake passage, and is used to control the flow rate of the EGR gas. The EGR valve 1 includes: a housing 2; a flow path 3 of EGR gas, which is formed on the casing 2; a valve seat 4, which is arranged in the middle of the flow path 3; a valve core 5, which can be placed on the valve seat 4 The valve stem 6 is integrally arranged with the valve core 5 in order to make the valve core 5 move relative to the valve seat 4; the actuator 8 as a driving part is used to make the valve stem 6 and the valve core 5 move towa...

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PUM

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Abstract

A lip seal is placed between a housing and a valve shaft and adjacent to a bearing of the shaft. A deposit-guard plug is placed between the housing and the shaft and adjacent to the lip seal. A first end of the lip seal is placed adjacent to a first end of the bearing. A first end of the plug is placed adjacent to a second end and a lip portion of the lip seal. A second end of the plug is placed to face a passage. A first distance from the first end of the bearing to the leading end of the lip portion of the lip seal and a second distance from the second end of the plug to the leading end of the lip portion of the lip seal are set to be longer than a maximum stroke of the shaft in stroke movement.

Description

technical field [0001] The present invention relates to an EGR valve driven by an actuator provided on an EGR passage of an exhaust gas recirculation device (EGR device). Background technique [0002] Conventionally, as such techniques, for example, techniques described in Patent Documents 1 to 3 below are known. In particular, in the housing of the EGR valve described in Patent Document 1, in order to open and close the valve element with respect to the valve seat, a valve stem that is reciprocated (stroked) by an actuator is provided via a bearing. In addition, a sealing member is provided between the valve stem and the housing to prevent leakage of gas, foreign matter, moisture, etc. from the gap between the valve stem and the bearing to the actuator side. [0003] Patent Document 1: WO 2010 / 18650 [0004] Patent Document 2: Japanese Patent Laid-Open No. 2005-120932 [0005] Patent Document 3: Japanese Patent Laid-Open No. 2006-90200 [0006] However, in the EGR valve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M25/07
CPCF16K41/04F02M26/54F02M26/67
Inventor 羽田野真
Owner AISAN IND CO LTD