Exhaust gas oxygen sensor monitoring

Details Exhaust gas oxygen sensor monitoring Exhaust gas oxygen sensor monitoring

1993-03-15

1995-02-21

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

731181, F02D 4114, G01M 1500

Patent

active

053906500

ABSTRACT:
Air/fuel ratio in an internal combustion engine is controlled so as to test the operation of an exhaust gas oxygen sensor. The engine is divided into two banks, each bank including an intake bank of cylinders, an exhaust path, and an exhaust gas oxygen sensor in the exhaust path. Air/fuel ratio control signals are used in connection with each of the two banks, the control signals being 180.degree. out of phase with each other.

REFERENCES:
patent: 4703735 (1987-11-01), Minamitani et al.
patent: 4984551 (1991-01-01), Moser
patent: 5157919 (1992-10-01), Gopp
patent: 5159810 (1992-11-01), Grutter et al.

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