EGR (Exhaust Gas Recirculation) valve

An EGR valve and valve plate technology, applied in the mechanical field, can solve the problems of high emission standards, large leakage, difficult control of processing and installation and assembly, and achieve the effect of high matching accuracy and improving sealing performance.

Active Publication Date: 2011-11-02
ZHEJIANG JIULONG MACHINERY
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Ordinary double-valve structure EGR valve, for the sealing treatment of double valves, usually adopts the machining accuracy to improve the distance between the double valves, so the processing equipment used requires high precision, the processing and installation are not easy to control, and the leakage is large
Therefore, in mass production, the EGR valve with ordinary double valve structure cannot meet the higher emission standards

Method used

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  • EGR (Exhaust Gas Recirculation) valve
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  • EGR (Exhaust Gas Recirculation) valve

Examples

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Embodiment Construction

[0020] Such as figure 1 , figure 2 As shown, what this embodiment adopts is the EGR valve of double valve structure. The EGR valve includes a valve body 1 with a cavity inside. The valve body 1 has an inlet and an outlet communicating with the inner cavity. The valve body 1 has a valve stem 2 connected with the power part. The inside of the valve body 1 has two The protruding sealing seat 3 has two valve plates on the valve stem 2 along its axial direction, and a sealing structure is formed between the valve plates and the sealing seat 3 .

[0021] Specifically, the valve plate includes a valve plate one 4 and a valve plate two 5 , and the valve plate one 4 is fixedly connected to the valve stem 2 . The valve stem 2 is provided with a positioning piece 6, the lower end of the valve stem 2 is fixedly connected with a base 9, the sleeve 7 is located between the base 9 and the positioning piece 6, and the sleeve 7 can move axially along the valve stem 2. The second valve plat...

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Abstract

The invention provides an EGR (Exhaust Gas Recirculation) valve, belonging to the technical field of machines. The EGR valve solves the problem that the existing EGR valve of the double-valve structure can not satisfy the higher emission standard. The EGR valve comprises a valve body of which the inner part is a cavity, wherein the valve body is provided with an inlet and an outlet, and the inletand the outlet are communicated with the inner cavity of the valve body; a valve rod partially connected with a power part is arranged in the valve body; the inner side of the valve body is provided with at least two extruded sealing sockets; the valve rod is provided with valve blocks which are of the same amount with the sealing sockets and correspond to the position with the sealing sockets along the axial direction of the valve rod; and a sealing structure is arranged between the valve blocks and the sealing sockets. The EGR valve is provided with a multi-valve structure composed of multiple valves and sealing sockets, so that the valve rod has high control precision to each valve, and thus the tightness of the EGR valve can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of machinery and relates to a valve, in particular to an EGR valve. Background technique [0002] Exhaust gas recirculation is to introduce part of the exhaust gas into the intake pipe during the working process of the engine, mix it with fresh air or atomized mixed gas, and then enter the engine cylinder for re-combustion. This method is currently an effective measure for reducing NOx emissions. However, excessive exhaust gas in the circulation will affect the normal operation of the engine, especially when the engine is running at idle speed, low speed and low load, and the engine is in a cold state, the recirculated exhaust gas will obviously reduce the performance of the engine. Therefore, people set an EGR valve in the exhaust gas recirculation to automatically adjust the amount of exhaust gas participating in the exhaust gas recirculation according to the change of the engine operating conditions. In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M25/07F16K1/44F02M26/67F02M26/68F02M26/69
CPCY02T10/121Y02T10/12
Inventor 王帮华薛炎杰
Owner ZHEJIANG JIULONG MACHINERY
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