An electric egr valve anti-carbon sticking mechanism

An EGR valve and anti-carbon technology, which is applied in the direction of engine components, machines/engines, mechanical equipment, etc., can solve the problems of valve discs that cannot be opened, EGR valve failure, etc., and achieve the effect of avoiding inability to open

Active Publication Date: 2018-08-17
BEIJING U BRIDGE CHAOYANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the engine stops for a long time, carbon deposits will bond the valve disc of the EGR valve to the valve seat, making the valve disc unable to open, thus making the EGR valve invalid

Method used

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  • An electric egr valve anti-carbon sticking mechanism
  • An electric egr valve anti-carbon sticking mechanism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] This embodiment is a method for preventing sticking of carbon deposits in an electric EGR valve. The method is as follows: when the engine is turned off, the valve disc of the electric EGR valve is prevented from contacting the valve seat to avoid sticking after the valve disc and the valve seat are cooled. lag.

[0018] The idea of ​​this embodiment is to separate the valve seat and disc of the electric EGR valve when the engine is stopped, so that the two cannot stick. In practice, most of the actual situations are that the valve seat and the valve disc are separated, but there are situations where the valve disc and the valve seat are together, that is, the valve seat and the valve disc are closed. As long as the seat and disc are closed, the problem of seat and disc sticking will occur. Therefore, this embodiment adopts a very simple and effective method: when the engine is stopped, the valve disc and the valve seat are separated, the most basic conditions of the t...

Embodiment 2

[0022] This embodiment is an improvement of the first embodiment, which is a refinement of the first embodiment on the way of preventing the valve flap from contacting the valve seat. In this embodiment, when the engine is turned off, the way to prevent the valve disc from contacting the valve seat is to set an electric blocking block to prevent the reciprocating mechanism driven by the electric motor of the electric EGR valve from reaching the closed position of the valve disc and the valve seat when the engine is turned off. .

[0023] This embodiment adopts a simple electromechanical structure. When the engine is turned off, a blocking block is inserted into the reciprocating mechanism of the EGR valve to block the movement of the reciprocating mechanism to achieve the effect of preventing the valve seat and the valve disc from closing. Of course, the EGR motor should also have a protection device, which can stop the rotation when it is blocked, so as to prevent the motor c...

Embodiment 3

[0025] This embodiment is an improvement of the first embodiment, which is a refinement of the first embodiment on the way of preventing the valve flap from contacting the valve seat. In this embodiment, when the engine is turned off, the way to prevent the valve disc from contacting the valve seat is to set an electric blocking block inserted between the valve disc and the valve seat to prevent the valve disc and the valve seat from closing.

[0026] This embodiment also adopts the way of the blocking block, but the blocking position of the blocking block is different from that of the second embodiment. In this embodiment, the blocking block is arranged between the valve seat and the valve flap to directly block the closing of the two.

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PUM

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Abstract

The invention relates to an anti-carbon and viscosity method and a mechanism of an electric EGR (exhaust gas recirculation) valve. When an engine is shut down, a valve clack of the electric EGR valve is prevented from making contact with a valve seat, so that the valve clack is prevented from sticking to the valve seat after cooling. The invention provides a method for separating the valve seat from the valve clack when the engine is shut down, so that the valve clack of the electric EGR valve is prevented from sticking to the valve seat when the engine is shut down. The valve seat is separated from the valve clack, so that the valve seat cannot stick to the valve clack when the engine is shut down for a long time, and the problem of damage to the electric EGR valve due to the viscosity of the valve clack and the valve seat when the engine is shut down for a long time is solved. Additionally, the invention provides a device for realizing the method: a solenoid coil is arranged in the electric EGR valve so as to control a bolt, so that that the valve clack is limited to close when the engine is shut down, a certain gap is formed between the valve clack and the valve seat of the electric EGR valve when the engine is not operated, the viscosity of the valve clack and the valve seat due to carbon deposition is prevented, and the problem that the EGR valve cannot be opened is avoided.

Description

technical field [0001] The invention relates to a method and a mechanism for preventing carbon deposition and stickiness of an electric EGR valve, which is a mechanical transmission method and a mechanism, and a method and a mechanism for a valve used in an automobile engine recirculation system. Background technique [0002] The electric EGR valve works in the exhaust gas recirculation system of the automobile engine, and the working environment of the valve disc is very harsh. When the engine stops working, the valve disc is in a normal temperature state, and when the engine is running, the valve disc is in a high-temperature flowing gas full of smoke. The high-temperature flue gas discharged from the engine contains a large amount of combustion residual hydrocarbons and other impurities. During the long-term operation of the engine, these substances in the flue gas will inevitably gradually settle on the valve disc, valve seat and surrounding valve walls. Carbon deposits...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M26/74
CPCF02M26/74
Inventor 景建周吴思玉薛山
Owner BEIJING U BRIDGE CHAOYANG
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