Electronic exhaust gas recirculation valve control

Details Electronic exhaust gas recirculation valve control Electronic exhaust gas recirculation valve control

2006-10-24

2006-10-24

Wolfe, Jr., Willis R. (Department: 3747)

Internal-combustion engines

Charge forming device

Exhaust gas used with the combustible mixture

C701S108000

Reexamination Certificate

active

07124751

ABSTRACT:
An EGR valve position control method controls a position of an EGR valve according to a pressure change across the valve and a desired EGR valve position. The method calculates a desired EGR valve position and generates one or more duty cycle control terms based on a difference between the desired EGR valve position and an actual EGR valve position. Additionally, the method provides feedforward control based on the pressure change and the desired EGR valve position in order to generate feedforward duty cycle control terms. The method controls the position of the EGR valve based on the duty cycle control terms.

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