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Flow diagnosis method and device of egr system and vehicle

A diagnostic method and a diagnostic device technology, which are applied in the direction of charging systems, machines/engines, mechanical equipment, etc., can solve problems such as heavy matching workload, and achieve reliable and effective diagnostic results

Active Publication Date: 2022-01-18
UNITED AUTOMOTIVE ELECTRONICS SYST
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  • Claims
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Problems solved by technology

[0006] However, the existing scheme of using the pressure change in the pipeline of the EGR system to diagnose the flow rate requires a large matching workload, and cannot make fully automatic vehicles that lack fuel cut-off conditions meet the IUPR rate requirements in CN6 regulations

Method used

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  • Flow diagnosis method and device of egr system and vehicle
  • Flow diagnosis method and device of egr system and vehicle
  • Flow diagnosis method and device of egr system and vehicle

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Embodiment Construction

[0052] The technical solutions proposed by the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0053] An embodiment of the present invention provides a flow diagnosis method for an EGR system, which can be applied to figure 1 A low flow fault and a high flow fault of the EGR valve 104 of an EGR system are shown for diagnosis. Among them, please refer to figure 1 , The structure of the EGR system specifically includes: an air filter 101 , a supercharger 102 , a throttle valve 103 , an EGR valve 104 , an EGR intercooler 105 , an engine 106 , a turbine 107 , a catalytic conver...

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Abstract

The invention provides a flow diagnosis method and device of an EGR system and an automobile. The flow diagnosis is no longer based on the pressure change in the pipeline of the EGR system, but the outlet temperature of the EGR valve and the intake pipe temperature in different states It is simple and easy to perform flow diagnosis based on road temperature. At the same time, different diagnostic logics are used to perform high-flow diagnosis and low-flow diagnosis respectively, and multiple parameters are superimposed in the high-flow diagnosis stage and low-flow diagnosis stage. Exceeding the standard judgment, the diagnosis result is more reliable and effective, and the corresponding high flow diagnosis or low flow diagnosis can be carried out under various working conditions of the engine, so that the corresponding engine can also meet the IUPR rate requirements in the CN6 regulations. The present invention also provides an EGR system and an engine management system having the flow diagnosis device of the EGR system of the present invention, and a computer-readable storage medium capable of implementing the flow diagnosis method of the EGR system.

Description

technical field [0001] The invention relates to the technical field of exhaust gas recirculation, in particular to a flow diagnosis method and device of an EGR system, an EGR system, an engine management system, a computer-readable storage medium and an automobile. Background technique [0002] Engine (Engine) is a machine that can convert other forms of energy into mechanical energy, including internal combustion engines (gasoline engines, etc.), external combustion engines (Stirling engines, steam engines, etc.), electric motors, etc., where internal combustion engines are usually chemical can be converted into mechanical energy. The engine is not only applicable to the power generation device, but also refers to the whole machine including the power device (such as: gasoline engine, aero engine). With the stricter emission requirements of the CN6 regulations, more and more automobile engine systems are equipped with exhaust gas recirculation (Exhaust Gas Recirculation, E...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M26/49
CPCF02M26/49
Inventor 庞博曹暑林谢悦孝吕践方强
Owner UNITED AUTOMOTIVE ELECTRONICS SYST
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