Air/fuel imbalance detection system and method

Details Air/fuel imbalance detection system and method Air/fuel imbalance detection system and method

2006-12-26

2006-12-26

Huynh, Hai (Department: 3747)

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

C123S1980DA, C123S630000, C701S107000, C701S109000, C060S277000

Reexamination Certificate

active

07152594

ABSTRACT:
A method for detecting emissions from an internal combustion engine generally including determining a reference air/fuel mixture signal based on an engine speed and an airflow into the engine. The method includes determining an actual air/fuel mixture signal from an air/fuel mixture sensor and comparing the reference air/fuel mixture signal to the actual air/fuel mixture signal. The method also includes determining whether an air/fuel imbalance condition occurs based on the comparison and setting a service indicator based on the determination of whether the air/fuel imbalance condition occurred.

REFERENCES:
patent: 6021758 (2000-02-01), Carey et al.
patent: 6032659 (2000-03-01), Yamashita et al.
patent: 6314952 (2001-11-01), Turin et al.
patent: 6382198 (2002-05-01), Smith et al.
patent: 6481427 (2002-11-01), Javaherian
patent: 6668812 (2003-12-01), Javaherian
patent: 7027910 (2006-04-01), Javaherian et al.
Kainz, Jeff L. and Smith, James C., “Individual Cylinder Fuel Control With A Switching Oxygen Sensor”, SAE, Mar. 1-4, 1999, pp. 1-8.

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