Gm Global Technolgoy Operations, Inc.

John Maley

Joshua D Cowgill

Douglas Christopher Sarsen

Casey S Anderson

An engine control system includes: a target air mass module configured to determine a target mass of air within a cylinder of an engine based on a torque request; a boost control module configured to control boost provided by a turbocharger based on the torque request; an exhaust gas recirculation (EGR) control module configured to selectively: set a target opening of an EGR valve based on the target mass of air; set the target opening of the EGR valve to a predetermined minimum opening, where the predetermined minimum opening is greater than zero percent open; and control opening of the EGR valve based on the target opening of the EGR valve.

Exhaust gas recirculation control systems and methods

A control system for a turbocharger of a vehicle includes an enable module, an error module, a reduction module, and a boost module. The enable module is configured to: enable reduction in a boost pressure setpoint of a compressor of the turbocharger based on whether a fault exists, load on an engine, and a compressor outlet temperature; and generate an enable signal indicating whether reduction in the boost pressure setpoint is enabled. The error module configured to determine a difference between the compressor outlet temperature and a predetermined limit. The reduction control module is configured to, in response to the enable signal indicating reduction in the boost pressure setpoint is enabled, reduce the boost pressure setpoint based on the difference. The boost module is configured to adjust boost pressure output of the compressor based on the boost pressure setpoint.

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Howell, MI, United States of America

John Maley