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Waste gas recirculation valve

A technology for exhaust gas recirculation valves and air passages, which is applied in the direction of exhaust gas recirculation, engine components, machines/engines, etc., and can solve the problems of valve and housing air passage jamming, excessive air leakage, and inability to block housing air. To eliminate the leakage of exhaust gas out of tolerance and reduce the risk of sticking

Inactive Publication Date: 2019-04-12
UNITED AUTOMOTIVE ELECTRONICS SYST
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, due to thermal expansion and contraction under high and low temperature conditions, the problem of stagnation between the valve and the air passage of the housing is prone to occur, making it unable to operate normally
In addition, the torsion spring that provides the restoring force cannot provide restoring force when the valve enters or leaves the state of blocking the airway of the casing, and when there is no restoring force, the valve will not be able to block the airway of the casing (that is, the valve cannot return its default starting position), so that there is a gap between the valve and the airway part of the housing, causing the risk of out-of-tolerance air leakage

Method used

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Embodiment Construction

[0029] figure 1 It is a structural schematic diagram of an exhaust gas recirculation valve. like figure 1 As mentioned above, the traditional EGR valve includes a housing 10, a transmission wheel 21 and a torsion spring 23 arranged in the housing 10, a housing air passage 60 arranged on the housing 10, and the housing The air channel 60 is provided with a valve 40, the transmission wheel 21 is connected with a gear 22, the valve 40 is connected with the gear 22 through the valve shaft 30, and a driving device 50 is provided on one side of the housing 10. The driving device 50 drives the gear 22 to drive the transmission wheel 21 to rotate in the first direction, and drives the gear 22 to drive the valve to rotate in the housing air passage 60 in the first direction. The torsion spring 23 is helically wound on the transmission wheel 21 along the axial direction of the transmission wheel 21 and is located on one side of the gear. On the two convex ribs of the housing, the tor...

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Abstract

The invention provides a waste gas recirculation valve. The waste gas recirculation valve comprises a shell, and a transmission mechanism, a torsional spring and a limit mechanism which are arranged in the shell. A shell air path is formed in the shell. A valve is arranged on the shell air path. The transmission mechanism is used for driving the valve to move so as to regulate the flow rate of gasin the shell air path. The torsional spring is connected with the transmission mechanism and used for driving the transmission mechanism to reset to a target position through a reset torsional braid,and the reset torsion of the torsional spring in the target position is 0. The limit mechanism is used for stopping the transmission mechanism from resetting to the target position when the torsionalspring drives the transmission mechanism to reset in the specified direction, so that the reset torsion of the torsional spring is greater than 0 when the torsional spring is stopped by the limit mechanism. The risk of clamping stagnation between the valve and the shell air path under high and low temperature conditions is effectively lowered.

Description

technical field [0001] The invention relates to the technical field of valve body design, in particular to an exhaust gas recirculation valve. Background technique [0002] As the number of automobiles increases year by year, the harm caused by automobile exhaust is becoming more and more serious. Car exhaust contains carbon monoxide, hydrocarbons, nitrogen oxides and particulates. Among them, nitrogen oxides not only threaten people's health, but also seriously pollute the environment, such as causing photochemical smog. Therefore, various emission regulations impose strict requirements on the emission of nitrogen oxides. EGR (Exhaust Gas Recirculation, referred to as EGR, exhaust gas recirculation), as a technology that can effectively reduce nitrogen oxides, is widely used in automobile engines. [0003] EGR guides an appropriate amount of exhaust gas from the engine to the intake end of the air passage, and mixes it with the inhaled fresh air at the intake end to dilu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M26/52F02M26/53
CPCF02M26/52F02M26/53
Inventor 宋士磊于明涛于东黎阳高雅
Owner UNITED AUTOMOTIVE ELECTRONICS SYST
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