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exhaust return valve

An exhaust gas recirculation valve and exhaust gas recirculation technology, which are applied in the direction of exhaust gas recirculation, charging system, combustion engine, etc., can solve the problem that the EGR gas flow cannot be precisely controlled

Active Publication Date: 2016-07-06
AISAN IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the EGR gas flow rate may not be precisely controlled in the low opening area

Method used

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Examples

Experimental program
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Embodiment Construction

[0035] Hereinafter, an embodiment of an exhaust gas recirculation valve (EGR valve) according to the present invention will be described in detail with reference to the drawings.

[0036] figure 1 The EGR valve 1 in a fully closed state is shown by a front sectional view. figure 2 The EGR valve 1 in a fully open state is shown by a front sectional view. image 3 Represented by enlarged cross-sectional view figure 2 The part surrounded by the dotted four-frame S1. The EGR valve 1 is provided in an EGR passage for returning a part of the exhaust gas discharged from the engine to the intake passage as EGR gas, and is used for adjusting the flow rate of the EGR gas.

[0037] Such as figure 1 , figure 2 As shown, the EGR valve 1 includes a casing 2; a flow path 3 of EGR gas, which is formed in 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 metering part 20 of EGR gas is formed ...

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PUM

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Abstract

In an EGR valve, a valve element is moved with respect to a valve seat to adjust a passage section width of a measuring section, thereby regulating an EGR gas flow rate in a passage. The valve seat includes a valve hole, a first end face facing to a downstream side of the passage and a second end face facing to an upstream side of the passage. The inner circumferential surface of the valve hole has a concave curved shape with an inner diameter gradually increasing toward the second end face. The valve element is placed inside the valve hole to be movable in between a fully closed position and a fully open position. While the valve element is placed in the fully open position, passage section widths of parts of the measuring section in an EGR gas flow direction are approximate to each other.

Description

technical field [0001] The present invention relates to an exhaust gas recirculation valve driven by a driver provided in an exhaust gas recirculation passage constituting an exhaust gas recirculation (EGR) device. Background technique [0002] Conventionally, as such a technique, for example, a known Figure 7 , Figure 8 Exhaust gas recirculation valve (EGR valve) 61 of poppet valve structure as shown. The existing EGR valve 61 includes: a housing 62 containing a flow path 63 for EGR gas; a valve seat 64 provided in the middle of the flow path 63; A metering portion 80 of EGR gas is formed between the valve core 65 and the valve seat 64; a valve shaft 66, which is provided with the valve core 65 at one end so as to move the valve core 65 relative to the valve seat 64; and a driver 68, which It is used to make the valve shaft 66 and the valve core 65 move axially together. Further, the valve shaft 66 is stroked by the driver 68 to adjust the opening degree of the meterin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M26/66F02M26/68F02M26/67
CPCF02M26/68Y02T10/12
Inventor 浅沼博伊藤善政中岛一真稻垣贵树野口知之富田贵志鸟岛纯司古久保太郎
Owner AISAN IND CO LTD
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