Exhaust gas recirculation control systems and methods
First Claim
1. An engine control system for a vehicle, comprising:
- a flowrate module that determines a mass flowrate of exhaust gas recirculation (EGR) to an engine;
a first mass fraction calculating module that, based on the mass flowrate of EGR, determines a first mass fraction of recirculated exhaust gas of a first gas charge for a first combustion event of the engine;
a second mass fraction calculating module that determines a second mass fraction of recirculated exhaust gas of a second gas charge for a second combustion event of the engine based on an average of the first mass fraction and one or more other values of the first mass fraction determined for other combustion events, respectively; and
an actuator control module that selectively adjusts an engine operating parameter based on the second mass fraction.
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Abstract
An engine control system for a vehicle includes a flowrate module, first and second mass fraction calculating modules, and an actuator control module. The flowrate module determines a mass flowrate of exhaust gas recirculation (EGR) to an engine. The first mass fraction calculating module, based on the mass flowrate of EGR, determines a first mass fraction of recirculated exhaust gas relative of a first gas charge for a first combustion event of the engine. The second mass fraction calculating module determines a second mass fraction of recirculated exhaust gas of a second gas charge for a second combustion event of the engine based on an average of the first mass fraction and one or more other values of the first mass fraction determined for other combustion events, respectively. The actuator control module selectively adjusts an engine operating parameter based on the second mass fraction.
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Citations
20 Claims
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1. An engine control system for a vehicle, comprising:
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a flowrate module that determines a mass flowrate of exhaust gas recirculation (EGR) to an engine; a first mass fraction calculating module that, based on the mass flowrate of EGR, determines a first mass fraction of recirculated exhaust gas of a first gas charge for a first combustion event of the engine; a second mass fraction calculating module that determines a second mass fraction of recirculated exhaust gas of a second gas charge for a second combustion event of the engine based on an average of the first mass fraction and one or more other values of the first mass fraction determined for other combustion events, respectively; and an actuator control module that selectively adjusts an engine operating parameter based on the second mass fraction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An engine control method for a vehicle, comprising:
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determining a mass flowrate of exhaust gas recirculation (EGR) to an engine; based on the mass flowrate of EGR, determining a first mass fraction of recirculated exhaust gas of a first gas charge for a first combustion event of the engine; determining a second mass fraction of recirculated exhaust gas of a second gas charge for a second combustion event of the engine based on an average of the first mass fraction and one or more other values of the first mass fraction determined for other combustion events, respectively; and selectively adjusting an engine operating parameter based on the second mass fraction. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification