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egr check valve and egr system

A one-way valve and valve seat technology, which is applied in the field of EGR one-way valve and EGR system, can solve the problems of short service life of EGR one-way valve and valve disc rupture, so as to prolong the service life, reduce the probability of rupture, and increase the The effect of large outflow area

Active Publication Date: 2022-04-26
WEICHAI POWER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the valve plate of the EGR check valve is a cantilever beam structure. Since the EGR gas passing through the EGR check valve is pulsed, the valve plate of the EGR check valve is bent back and forth under the action of the pulsed air flow. High-frequency movement under the influence of exhaust pulse, the probability of the valve plate breaking at the bend is greater, resulting in a shorter service life of the EGR check valve

Method used

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Embodiment Construction

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0032] Such as Figure 1-7 As shown, the EGR check valve provided by the embodiment of the present invention includes: a valve seat 1 provided with an air inlet and an air outlet 10, a stopper 5 fixed on the valve seat 1 and located outside the valve seat 1, and movably The valve plate 2 and the reset structure are arranged between the limiting member 5 and the valve seat 1.

[0033] The above-mentioned valve seat 1 is used for connecting with the intake pipe...

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Abstract

The invention discloses an EGR one-way valve and an EGR system. The EGR one-way valve comprises: a valve seat provided with an air inlet and an air outlet; The valve plate set between the limiter and the valve seat, and the reset structure; wherein, the reset structure can make the valve plate move to the valve seat and press against the valve seat to close the air outlet; when the valve plate leaves the valve seat, the air outlet Open, the gap between the valve plate and the valve seat forms an air outlet channel. The above-mentioned EGR check valve realizes the opening and closing of the air outlet on the valve seat through the movement of the valve plate between the limiter and the valve seat. Compared with the prior art, the valve plate does not need to be bent, which effectively reduces the The probability of fracture, thereby prolonging the service life of the EGR check valve; at the same time, the airflow discharged from the air outlet is discharged from the gap between the valve plate and the valve seat into the pipeline where the EGR check valve is located, increasing the outflow area , reducing the probability of the above-mentioned EGR one-way valve being blocked.

Description

technical field [0001] The invention relates to the technical field of exhaust gas recirculation, and more specifically, relates to an EGR check valve and an EGR system. Background technique [0002] EGR system, that is, exhaust gas recirculation system, is used to reduce the NO of the engine x emissions. According to whether the exhaust gas passes through the intake system, the EGR system can be divided into an internal EGR system and an external EGR system. Among them, the external EGR system is more commonly used. [0003] In the external EGR system, the EGR pipeline introduces the exhaust gas in the exhaust pipe into the intake pipe, so that the exhaust gas and fresh air are fully mixed before entering the cylinder. The external EGR system can precisely control the EGR rate through the electronic control system to optimize the engine performance, and an EGR cooler can be installed in the EGR pipeline to reduce the temperature of the exhaust gas, thereby effectively red...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M26/70
CPCF02M26/70
Inventor 李卫王雪鹏潘洁李建锋
Owner WEICHAI POWER CO LTD
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