Invention Application
US20140144414A1 METHOD FOR CONTROLLING EXHAUST GAS RE-CIRCULATION SYSTEM IN AN INTERNAL COMBUSTION ENGINE 有权
用于控制内燃机中排气再循环系统的方法

METHOD FOR CONTROLLING EXHAUST GAS RE-CIRCULATION SYSTEM IN AN INTERNAL COMBUSTION ENGINE
Abstract:
A method for controlling re-circulation of exhaust gas (EGR) in an internal combustion engine includes receiving a signal indicative of an engine operating temperature and comparing the engine operating temperature to a first predetermined IEGR threshold. When the engine operating temperature is less than the first predetermined internal EGR threshold, a first internal EGR mode is activated, whereby engine emissions may be reduced or combustion stability may be enhanced. When the engine operating temperature is greater than the first predetermined internal EGR threshold, the first internal EGR mode is deactivated, and a second internal EGR mode is activated, whereby emissions may be reduced as exhaust system heating is accelerated. When the operating temperature is greater than the second temperature threshold, the second internal EGR mode may be deactivated a third mode may be enabled with only external EGR.
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