Method and system for solving changes of exhaust gas recirculation (EGR) characteristic curves

A technology of characteristic curve and rate of change, applied in the field of solving the change of EGR characteristic curve, can solve the problems of inconsistent setting opening, deviation of EGR opening, fast aging speed, etc., and achieve the effect of eliminating adverse effects and improving exhaust gas recirculation efficiency.

Active Publication Date: 2012-07-25
WEICHAI POWER CO LTD
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Problems solved by technology

[0004] However, due to the high temperature and high pollution of the exhaust gas, the working environment of the EGR system is harsh, and its aging speed is fast. The EGR setting opening corresponding to the control signal on the characteristic curve is inconsistent, that is, the EGR char

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  • Method and system for solving changes of exhaust gas recirculation (EGR) characteristic curves
  • Method and system for solving changes of exhaust gas recirculation (EGR) characteristic curves
  • Method and system for solving changes of exhaust gas recirculation (EGR) characteristic curves

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Embodiment Construction

[0029] The core of the present invention is to provide a method and system for solving EGR characteristic curve changes, which can eliminate the influence of EGR curve changes on the EGR system work.

[0030] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. For ease of understanding and brevity of description, the method and system for solving EGR characteristic curve changes will be described below, and the beneficial effects will not be discussed repeatedly.

[0031] The system for solving the EGR characteristic curve change provided by the present invention mainly includes an EGR opening detection element, a test module and an update module. The main operation process of the system can be understood in conjunction with the following content.

[0032] Please refer to figure ...

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Abstract

The invention discloses a method and a system for solving changes of exhaust gas recirculation (EGR) characteristic curves. The method comprises the following steps: (10) extracting stored EGR characteristic curves, (20) sequentially outputting and obtaining EGR actual opening degree according to control signals in the EGR characteristic curves corresponding to the control signals, and (30) updating the EGR characteristic curves according to the EGR actual opening degree. The method and the system enable updated EGR characteristic curves to meet the existing working conditions of the EGR through testing and updating, can control the EGR actual opening degree according to the updated EGR characteristic curves in the actual operating process enable the EGR actual opening degree and the opening degree required by the EGR to be always constant, thereby ensuring good exhaust gas recirculation efficiency and eliminating the negative influence brought by the changes of the EGR characteristic curves.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a method and system for solving EGR characteristic curve changes. Background technique [0002] The engine is a device that converts the chemical energy of fuel into mechanical energy. The combustion of fuel needs to be mixed with air in a certain proportion. In order to meet the national emission regulations, the engine needs to reduce the nitrogen oxide content in the exhaust gas. The EGR system (Exhaust Gas Recirculation, exhaust gas recirculation system) can reintroduce the exhaust gas into the intake system, thereby using the carbon dioxide in the exhaust gas to reduce the combustion temperature in the cylinder. , thereby inhibiting the formation of nitrogen oxides and meeting emission regulations. [0003] Of course, the EGR rate must be limited to a certain extent, otherwise too much exhaust gas entering the combustion chamber may worsen the emissions of hydrocarbons, car...

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Application Information

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IPC IPC(8): F02D21/08
Inventor 刘兴义张展腾胡广地
Owner WEICHAI POWER CO LTD
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