Valve duty differentiated exhaust gas recirculation control method and exhaust gas recirculation system
AssigneesHyundai Motor Company, Kia Motors Corporation
InventorsHyun-Woo NOH, Jin-Suk KANG, Ki-Min PARK
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Abstract
An exhaust gas recirculation (EGR) control method includes a valve duty differentiated control including: detecting, by a controller, an engine operation region, a mixer region, and an external factor region as a valve control condition for an EGR valve duty correction variable for controlling an EGR system; applying, by the controller, the EGR valve duty correction variable to an EGR valve duty, which is set by a target air amount to an intake air amount, to calculate a minimum EGR valve duty; and outputting, by the controller, the calculated minimum EGR valve duty to an EGR valve as the EGR valve duty.
Claims19
An exhaust gas recirculation gas (EGR) control method, comprising a valve duty differentiated control including:
- detecting, by a controller, an engine operation region, a mixer region, and an external factor region as a valve control condition for an EGR valve duty correction variable for controlling an EGR system;
- applying, by the controller, the EGR valve duty correction variable to an EGR valve duty, which is set by a target air amount to an intake air amount, to calculate a minimum EGR valve duty;
- and
- outputting the calculated minimum EGR valve duty to an EGR valve as the EGR valve duty.
An exhaust gas recirculation (EGR) system, comprising:
- a controller for implementing a valve duty differentiated control,
- wherein the valve duty differentiated control:
- detects an operation region to which acceleration is applied, a mixer region to which air-fuel rich is applied, and an external factor region to which a cooling water temperature, a high latitude, and a gear stage are applied as a valve control condition, respectively;
- and
- calculates an EGR valve duty, which is set by a target air amount to an intake air amount, by a minimum EGR valve duty depending upon the valve control condition and applying the calculated EGR valve duty for an EGR valve.
Dependencies are inferred from the claim text.