Coordinated control of throttle and egr valve
AssigneeGM Global Technology Operations LLC
InventorQian Chen
Life of this patent
Estimating the term…
Abstract
An engine control system that includes a throttle and an exhaust gas recirculation (EGR) valve to regulate a mass air flow (MAF) into an engine includes a first module that determines a MAF control command based on a MAF error. A second module determines an EGR valve position based on the MAF control command and a maximum EGR valve range and the throttle resolution. The throttle is fully open and the EGR valve based on the EGR position when the desired MAF is less than the maximum EGR valve range.
Claims15
An engine control system that includes a throttle and an exhaust gas recirculation (EGR) valve to regulate a mass air flow (MAF) into an engine, comprising:
- a first module that determines a MAF control command based on a MAF error;
- and
- a second module that determines an EGR valve position based on said MAF control command and a maximum EGR valve range, wherein said throttle is fully open and said EGR valve is regulated to achieve said EGR valve position when said MAF control command is less than said maximum EGR valve range.
A method of regulating a mass air flow (MAF) into an engine that includes a throttle and an exhaust gas recirculation (EGR) valve, comprising:
- determining a MAF control command based on a MAF error;
- determining an EGR valve position based on said MAF control command and a maximum EGR valve range;
- and
- maintaining said throttle in a fully open position and regulating said EGR valve based on said EGR valve position, when said MAF control command is less than said maximum EGR valve range.
A method of regulating a mass air flow (MAF) into an engine that includes a throttle and an exhaust gas recirculation (EGR) valve, comprising:
- determining a throttle position to regulate a MAF into said engine;
- determining an EGR valve position to regulate an exhaust gas flow into said engine;
- determining a MAF control command based on a MAF error, wherein said EGR valve position is based on said MAF control command and a maximum EGR valve range;
- and
- maintaining said throttle in a fully open position and regulating said EGR valve based on said EGR valve position when said MAF control command is less than said maximum EGR valve range.
Dependencies are inferred from the claim text.