EGR (Exhaust Gas Recirculation) valve control system and control method thereof
A technology of EGR valve and control system, applied in electrical control, engine control, fuel injection control, etc., can solve problems such as combustion deterioration, combustion phase delay, unfavorable emission stability, etc.
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[0036] The embodiment of the present invention provides an implementation of an EGR valve control system and a control method thereof, mainly for closed loop control of the EGR valve opening degree based on the air intake flow in the prior art, requires the model to calculate the total amount of air, due to the calculation error Bringing the problem of incorrect control of EGR valve, for this purpose, the embodiment of the present invention proposes to achieve the opening degree adjustment of the EGR valve by directly closed loop control, improve the control accuracy of the EGR valve, and realize the purpose of improving engine emissions.
[0037] See Figure 4 An EGR valve control system that includes a controller ECU, an EGR system 2, a rotational speed sensor, a atmospheric temperature sensor, an atmospheric pressure sensor, a coolant temperature sensor, a TMAP sensor 3, a venturi flow meter pressure difference sensor 4 and EGR valve downstream temperature sensor 5. The EGR syst...
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