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US 8,109,091 B2Granted
Exhaust gas recirculation control systems and methods
AssigneeGM Global Technology Operations LLC
InventorsYun Xiao, Kouji Sakumoto
Life of this patent
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Abstract
An exhaust gas recirculation control system comprises a pressure condition evaluation module and a protection module. The pressure condition evaluation module evaluates at least one of vane movement of a turbocharger and engine pressure. The protection module selectively controls an exhaust gas recirculation valve based on the at least one of the vane movement of the turbocharger and the engine pressure.
Claims18
An exhaust gas recirculation control system, comprising:
- a pressure condition evaluation module that evaluates at least one of vane movement of a turbocharger and engine pressure to detect at least one of slow vane movement and a vane jam event;
- an enable module that enables the pressure condition evaluation module to evaluate the at least one of the vane movement and the engine pressure based on engine speed, engine load, and engine temperature;
- and
- a protection module that selectively controls an exhaust gas recirculation valve based on the at least one of the vane movement of the turbocharger and the engine pressure to protect the turbocharger.
1 more element
A method of controlling an exhaust gas recirculation control system, comprising:
- evaluating at least one of vane movement of a turbocharger and engine pressure to detect at least one of slow vane movement and a vane lam event;
- enabling the evaluation of the at least one of the vane movement of the turbocharger and the engine pressure based on engine speed, engine load, and engine temperature;
- and
- selectively controlling an exhaust gas recirculation valve based on the at least one of the vane movement of the turbocharger and the engine pressure to protect the turbocharger.
1 more element
Dependencies are inferred from the claim text.