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EGR valve control method and device and computer readable storage medium

A technology of EGR valve and control method, applied in electrical control, engine control, fuel injection control, etc., can solve problems such as poor gas emission consistency

Inactive Publication Date: 2021-04-02
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that, aiming at the defects of the prior art, the present invention provides an EGR valve control method, a control device and a computer-readable storage medium to solve the problem of poor consistency of gas discharge in the traditional EGR valve control mode question

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  • EGR valve control method and device and computer readable storage medium
  • EGR valve control method and device and computer readable storage medium
  • EGR valve control method and device and computer readable storage medium

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Embodiment Construction

[0048] In order to make the object, technical solution and advantages of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0049] In the existing EGR control method, the closed-loop control method based on the air flow meter is adopted. This closed-loop control method needs to set the air volume demand value according to the engine speed and load, and then control the EGR valve opening to make the air The measured value of the amount is consistent with the demand value; however, this closed-loop control method cannot accurately control the EGR rate, resulting in poor consistency of gas emissions.

[0050] The inventor proposes a kind of EGR valve control method for above-mentioned problem, and this EGR valve...

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Abstract

The invention discloses an EGR valve control method and device and a computer readable storage medium. The method comprises the steps of obtaining the total air inflow of an engine; obtaining a pressure ratio of an inlet to an outlet of an EGR valve of the engine, and calculating the current EGR waste gas flow and a current EGR rate of the engine according to the pressure ratio; obtaining a targetEGR rate, and calculating the target fresh air inflow according to the total air inflow and the target EGR rate; and adjusting the opening degree of the EGR valve according to the target fresh air inflow. The total air inflow of the engine is obtained, the current EGR waste gas flow is calculated through the pressure ratio of the front portion and the rear portion of the EGR valve, the target fresh air inflow is calculated in real time according to the total air inflow of the engine and the target EGR rate, and then the actual fresh air inflow reaches the target fresh air inflow by adjustingthe EGR opening degree, so that the current EGR rate reaches the target EGR rate.

Description

technical field [0001] The present invention relates to the application field of an EGR valve control device, in particular to an EGR valve control method, a control device and a computer-readable storage medium. Background technique [0002] EGR is the abbreviation of Exhaust Gas Re-circulation, that is, the abbreviation of exhaust gas recirculation. Exhaust gas recirculation refers to the return of part of the exhaust gas from the engine to the intake manifold, and re-enters the cylinder together with the fresh mixture. Because the exhaust gas contains a large amount of CO2 and other polyatomic gases, CO2 and other gases cannot be burned, but absorb a large amount of heat due to their high specific heat capacity, which reduces the maximum combustion temperature of the mixture in the cylinder, thereby reducing the amount of NOx produced. At present, diesel vehicles generally use this technology to achieve the purpose of reducing NOx emissions. [0003] At present, in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D41/00F02D21/08
CPCF02D41/0077F02D2200/04
Inventor 王云鹏李超邓柯詹坤刘海报王晓鹏
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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