Air/fuel ratio estimation system for internal combustion engine

Details Air/fuel ratio estimation system for internal combustion engine Air/fuel ratio estimation system for internal combustion engine

1995-02-03

1996-08-20

Teska, Kevin J.

Boots, shoes, and leggings

36443103, 36443104, 60276, 60277, 123673, 123479, G06G 770, F02D 4100, F01N 300

Patent

active

055485146

ABSTRACT:
A system for estimating air/fuel ratios in the individual cylinders of a multicylinder internal combustion engine from an output of an air/fuel ratio sensor installed at an exhaust system of the engine. In the system, the exhaust system behavior is derived by a model in which X(k) is observed from a state equation and an output equation in which an input U(k) indicates air/fuel ratios in the individual cylinder and an output Y(k) indicates of the estimated air/fuel ratio as

REFERENCES:
patent: 4915079 (1990-04-01), Holmes
patent: 4962741 (1990-10-01), Cook et al.
patent: 5073113 (1991-12-01), Matsuoka
patent: 5158063 (1992-10-01), Hosoda et al.
patent: 5363648 (1994-11-01), Akazaki et al.

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