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Dynamic control method and device of EGR valve opening, and EGR engine

An EGR valve and dynamic control technology, applied in engine control, machine/engine, electrical control, etc., can solve problems such as transient smoke increase, transient air-fuel ratio decrease, exhaust gas entry, etc., and achieve the effect of improving power performance

Active Publication Date: 2013-10-23
WEICHAI POWER CO LTD
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a dynamic control method for the opening of the EGR valve, which solves the problem that the existing technology cannot accurately adjust the opening of the EGR valve under transient conditions, which may cause a large amount of exhaust gas to enter the intake pipe, The problem that the transient air-fuel ratio decreases and the transient smoke increases significantly

Method used

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  • Dynamic control method and device of EGR valve opening, and EGR engine
  • Dynamic control method and device of EGR valve opening, and EGR engine
  • Dynamic control method and device of EGR valve opening, and EGR engine

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Embodiment Construction

[0025] In order to make the above objects, features and advantages of the present invention more understandable, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0026] refer to figure 2 , shows the process of the first embodiment of the dynamic control method of the EGR valve opening of the present invention, specifically including:

[0027] Step S201: collecting working condition parameters of the EGR engine;

[0028] In this preferred embodiment, in order to realize the dynamic control of the EGR valve opening of the EGR engine, the engine operating condition parameters that need to be collected include: engine speed Speed, engine fuel injection quantity qCylinder (or engine torque Torque or throttle position APP), The intake pressure pIntake of the engine, and the dynamic pressure difference DeltaP_Dynamic between the engine exhaust pipe and the intake pipe.

[0029]Among them, engine speed S...

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Abstract

The invention provides a dynamic control method of EGR (exhaust gas recirculation) valve opening, which is used for dynamically controlling the EGR valve opening of an EGR engine. The method comprises the steps that a working condition parameter of the EGR engine is acquired; a corrected EGR valve opening value is obtained after the working condition parameter of the EGR engine is processed; and the EGR valve opening is controlled according to the corrected EGR valve opening value. The invention further provides a dynamic control device of the EGR valve opening and the EGR engine. With the adoption of the scheme, the opening value of an EGR valve is corrected dynamically through a pressure difference value between an exhaust pipe and a gas inlet pipe, so that accurate control on the EGR valve of the engine on an instantaneous working condition is achieved, and the power performance, the economical efficiency and the emission performance of the EGR engine can be improved effectively.

Description

technical field [0001] The present invention mainly relates to engine exhaust gas recirculation (EGR, Exhaust Gas Recirculation) control technology, in particular to a dynamic control method and device for EGR valve opening, and an EGR engine including the above device. Background technique [0002] The EGR engine realizes the reduction of NO by adjusting the opening of the EGR valve and then controlling the amount of exhaust gas that enters the combustion chamber of the engine through the EGR pipeline arranged between the intake pipe and the exhaust pipe of the engine and participates in combustion again. x emissions target. [0003] Existing EGR engines have two control methods, open-loop and closed-loop. Among them, the EGR open-loop control method is to control the EGR valve opening under each working condition through the map. The EGR rate under the condition is used to calibrate the opening of the EGR valve to form an EGR opening map, and the EGR valve opening of each...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02D21/08F02D41/22
Inventor 何福臣代子阳王树波仲昆
Owner WEICHAI POWER CO LTD
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