Quick EGR flow restriction test based on compensated mass...

Details Quick EGR flow restriction test based on compensated mass... Quick EGR flow restriction test based on compensated mass...

2007-06-12

2007-06-12

Wolfe, Jr., Willis R. (Department: 3747)

Internal-combustion engines

Charge forming device

Exhaust gas used with the combustible mixture

C073S118040, C701S108000

Reexamination Certificate

active

11289946

ABSTRACT:
An engine control system that monitors flow restriction through an exhaust gas recirculation (EGR) system of an engine includes a first module that calculates a test EGR mass flow rate based on a first average EGR mass flow rate when the EGR system is in an EGR OFF mode and a second average EGR mass flow rate when the EGR system is in an EGR ON mode. A second module selectively generates a fault signal based on the test EGR mass flow rate.

REFERENCES:
patent: 5257534 (1993-11-01), Azuma et al.
patent: 5257610 (1993-11-01), Ohuchi
patent: 5488938 (1996-02-01), Ohuchi
patent: 5675080 (1997-10-01), Wada
patent: 7100586 (2006-09-01), Matsumoto

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