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Control method and system of EGR valve and storage medium

An EGR valve and control method technology, applied in the field of vehicle engineering, can solve the problems such as the inability to completely remove carbon deposits and the wear of the EGR valve.

Active Publication Date: 2019-12-31
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the above-mentioned technical problems, the application provides a control method, system and storage medium of an EGR valve, to solve the problem of self-learning or self-cleaning of EGR valves that may be caused by using the same control logic to control EGR valves with different degrees of old and new. Problems with unnecessary wear or carbon deposits that cannot be completely removed

Method used

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  • Control method and system of EGR valve and storage medium
  • Control method and system of EGR valve and storage medium
  • Control method and system of EGR valve and storage medium

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Embodiment Construction

[0042]The self-cleaning of the EGR valve means that when the engine is powered off, the EGR valve will reciprocate N times between the fully open and fully closed positions of the EGR valve under high current drive. During the reciprocating process of the EGR valve at the fully open and fully closed positions, the valve plate of the EGR valve will rub and squeeze against the valve body, and the transmission shaft will rub against the valve body. This friction and squeeze will adhere to the EGR The carbon deposit on the surface of the valve is crushed and rubbed off to achieve the purpose of self-cleaning, thereby preventing the occurrence of stuck phenomenon caused by thickening of the carbon deposit on the surface of the EGR valve.

[0043] The self-learning of the EGR valve refers to the process from full opening to full closing of the EGR valve under the control of the vehicle ECU. In the fully closed state, the rotation position of the motor is recorded as 0%, and in the fu...

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Abstract

The invention discloses a control method and system of an EGR valve and a storage medium. According to the control method of the EGR valve, the vehicle-miles of travel obtained from the day when the EGR valve is carried on an engine to this day are taken as the determination basis of the self-cleaning frequency and the self-learning frequency, the determined self-cleaning frequency and self-cleaning frequency are both positively related to the vehicle-miles of travel, and the problem that for an EGR valve which is used for a long period, since the carbon deposition situation is serious, afterthe self-cleaning process, deposited carbon cannot be thoroughly removed is solved; moreover, the problem that for an EGR valve which is used for a short period, the excessively-frequent self-cleaningprocess or self-learning process may cause unnecessary abrasion is solved.

Description

technical field [0001] The present application relates to the technical field of vehicle engineering, and more specifically, relates to a control method, system and storage medium of an EGR valve. Background technique [0002] EGR (Exhaust Gas Re-circulation, exhaust gas recirculation) refers to the process of returning part of the exhaust gas discharged from the engine to the engine intake manifold, and re-entering the cylinder together with the fresh mixed gas. Because the exhaust gas contains a large amount of polyatomic gases such as carbon dioxide, and carbon dioxide and other gases cannot be burned but absorb a large amount of heat due to their high specific heat capacity, the maximum combustion temperature of the mixed gas in the cylinder is reduced, thereby reducing the generation of nitrogen oxides. [0003] For an EGR engine with EGR function, the control accuracy of EGR rate can directly affect the fuel consumption and smoke of the engine. In the process of contr...

Claims

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Application Information

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IPC IPC(8): F02M26/54F02M26/65
CPCF02M26/54F02M26/65
Inventor 刘学哲姚旺杨豫魁张广西代子阳顾昕岑
Owner WEICHAI POWER CO LTD