Linear-EGR flow rate adaption

Details Linear-EGR flow rate adaption Linear-EGR flow rate adaption

1998-08-31

2000-02-08

Wolfe, Willis R.

Internal-combustion engines

Charge forming device

Exhaust gas used with the combustible mixture

123436, F02M 2507

Patent

active

060217650

ABSTRACT:
A method of adapting a linear EGR system is provided to adjust flow rates based on engine roughness. Initially, the level of engine combustion roughness is measured and quantified by a known dynamic crankshaft fuel control methodology. In response, the method adjusts the EGR valve desired position higher or lower based on the measured combustion roughness. For example, if the engine is running "smooth", then more EGR is used. If the engine is running "rough", less EGR is used. As the engine approaches a roughness target, the EGR is stabilized.

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