Closing control system and method for engine egr valve
An EGR valve, closing control technology, applied in engine control, machine/engine, electrical program control, etc., can solve problems such as damage to the contact surface between the valve stem and the valve seat, poor sealing, damage, etc., to reduce the impact force.
Active Publication Date: 2021-05-25
常州易控汽车电子股份有限公司
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Problems solved by technology
Therefore, the impact of the valve stem when it is seated is likely to cause the bump between the valve stem and the valve seat. If the valve stem is seated with a large impact, it may damage the contact surface between the valve stem and the valve seat, resulting in damage, and then the seal is not tight, and the exhaust gas is leaked.
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[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0026] Embodiments of the present invention provide a closing control system for an engine EGR valve, such as figure 1 As shown, it includes an EGR unit 10, a processor unit 20,
[0027]The EGR unit 10 is configured to send the collected EGR valve position signal to the processor unit 20 and receive the actuator driving current sent by the processor unit;
[0028] The processor unit is configured to receive the EGR valve position signal and the engine state signal sent by the EGR unit 10 to generate a first EGR valve position target signal, and also receive the EGR valve position signal EGR valve ...
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The invention discloses a closing control system for an EGR valve of an engine, which comprises an EGR unit, which is used for sending a collected EGR valve position signal to a processor unit and receiving an actuator driving current sent by the processor unit; the processor The unit is configured to receive the EGR valve position signal and the engine state signal sent by the EGR unit to generate the first EGR valve position target signal, and also receive the EGR valve position signal sent by the EGR unit, and the EGR valve position target signal to generate the second EGR valve position target signal; used for the first EGR valve position target signal to generate a signal for determining the closed state of the EGR valve, and then combined with the second EGR valve position target signal to generate an actuator drive current and send it to an EGR unit; also disclosed is a method for using For the closing control method of the EGR valve of the engine, the present invention can not apply the motor driving force during the process of seating the valve stem to the true zero position, thereby reducing the impact force during seating.
Description
technical field [0001] The invention belongs to the technical field of engine EGR valve control, and in particular relates to a closing control system and method for an engine EGR valve. Background technique [0002] Although the average excess air coefficient is relatively large during the combustion process of a diesel engine, the local combustion temperature is high due to the uneven composition of the mixture, so it is easy to generate a large amount of NOx. EGR (Exhaust Gas Recirculation, Exhaust Gas Recirculation) technology can introduce part of the exhaust gas into the intake port, and participate in the combustion reaction together with fresh air. Oxygen concentration and combustion temperature can be reduced due to the introduction of exhaust gas. The production condition of NOx is high temperature and rich in oxygen, so EGR is one of the widely used NOx emission treatment technologies. [0003] In the EGR system, the exhaust pipe and the intake pipe are connecte...
Claims
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IPC IPC(8): G05B19/04F02D21/08
CPCF02D21/08G05B19/04
Inventor 张科勋李中李进郝守刚
Owner 常州易控汽车电子股份有限公司