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The control method of egr valve to improve engine shutdown noise

A technology of EGR valve and control method, which is applied in the direction of engine control, engine components, machines/engines, etc., can solve problems such as EGR valve abnormal noise, achieve the effects of avoiding emission deterioration, reducing comprehensive development costs, and solving EGR valve abnormal noise

Active Publication Date: 2022-07-15
GUANGXI YUCHAI MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a kind of EGR valve control method that improves engine shut-down noise, and it effectively solves the problem of EGR valve abnormal sound when shutting down, and reduces comprehensive development cost, shortens rectification cycle and avoids the problem of emission deterioration

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  • The control method of egr valve to improve engine shutdown noise
  • The control method of egr valve to improve engine shutdown noise
  • The control method of egr valve to improve engine shutdown noise

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Embodiment Construction

[0021] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0022] Unless expressly stated otherwise, throughout the specification and claims, the term "comprising" or its conjugations such as "comprising" or "comprising" and the like will be understood to include the stated elements or components, and Other elements or other components are not excluded.

[0023] figure 1 It is a flow chart of a control method of the EGR valve 2 for improving the engine shutdown noise according to an embodiment of the present invention. figure 2 It is a schematic diagram of the strategy of the EGR valve 2 control method for improving engine shutdown noise according to an embodiment of the present invention. image 3 It is a schematic diagram of the hardware structure of the EGR valve 2 control...

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Abstract

The invention discloses an EGR valve control method for improving engine shutdown noise, comprising: an ECU controller sending engine speed information to the EGR valve. The EGR valve recognizes the engine speed information and judges the engine running state. When the engine speed information is less than the preset value, the EGR valve cancels the valve closing duty cycle. And when the engine speed information is greater than the preset value, the EGR valve performs normal control. Thereby, the EGR valve control method for improving engine shutdown noise of the present invention effectively solves the problem of abnormal noise of the EGR valve during shutdown, reduces the comprehensive development cost, shortens the rectification period and avoids the problem of emission deterioration.

Description

technical field [0001] The present invention relates to the technical field of engines, in particular to an EGR valve control method for improving engine shutdown noise. Background technique [0002] In the prior art, the intelligent EGR valve cannot identify the engine operating conditions, and only performs corresponding actions through the required opening degree given by the ECU. When there is no opening degree command, the butterfly valve will output the closed valve duty when the valve is closed. The valve plate and the valve are closed tightly, so as to suppress the exhaust gas leakage caused by the small gap when the valve is closed; due to the design defect of the butterfly valve itself, as long as the EGR valve is closed, the continuous tension force will produce abnormal noise, which will affect the engine NVH. [0003] In the prior art solution, to solve the abnormal noise, the EGR valve should be opened by 5% to eliminate the abnormal noise caused by the reverse...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/00F02M26/00
CPCF02D41/0052F02M26/00F02M2026/005
Inventor 安利强杨庆恒陈俊红陈建勇宁承胜
Owner GUANGXI YUCHAI MASCH CO LTD