Internal-combustion engines – Charge forming device – Including exhaust gas condition responsive means
Patent
1994-07-28
1996-06-11
Nelli, Raymond A.
Internal-combustion engines
Charge forming device
Including exhaust gas condition responsive means
F02M 5100
Patent
active
055245986
ABSTRACT:
A method for detecting and controlling the air-fuel ratio of a multicylinder internal combustion engine through an output of a single air-fuel ratio sensor installed at a confluence point of the exhaust system of the engine. The detection response delay is assumed to be a first-order lag and a state variable model is established. Further, the air-fuel ratio at the confluence point is assumed to be a sum of the products of the past firing histories of the each cylinder of the engine and a second state variable model is established. An observer is then designed to observe the internal state of the second model and the air-fuel ratio at the individual cylinders are estimated from the output of the observer. The deadbeat control is carried out by calculating a ratio between the estimated air-fuel ratio and a target air-fuel ratio. The calculated ratio is multiplied to a correction value at a preceding control cycle earlier by a number corresponding to the number of the engine cylinders.
REFERENCES:
patent: 4377143 (1983-03-01), Hamburg
patent: 4785780 (1988-11-01), Kawai
patent: 4870586 (1989-09-01), Asakura et al.
patent: 4980834 (1990-12-01), Ikeda et al.
patent: 5121732 (1992-06-01), Benninger et al.
patent: 5148369 (1992-09-01), Uchinami et al.
patent: 5158063 (1992-10-01), Hosoda et al.
patent: 5163407 (1992-11-01), Yoshida et al.
patent: 5199408 (1993-04-01), Wataya
patent: 5222471 (1993-06-01), Stueven
patent: 5243954 (1993-09-01), Moss
patent: 5255662 (1993-10-01), Nakajima
patent: 5284118 (1994-02-01), Kato et al.
patent: 5327876 (1994-07-01), Uchida
Proceeding of the 1990 American Control Conference, 25 May 1990, San Diego, CA. pp. 2881-2886 "Individual Cylinder Air-Fuel Ratio Control with a snigle EGO Sensor".
Abstract of JP 3149330.
Abstract of JP 1110853.
European Search Report.
Brief explanation of publication 4-369471 (English translation).
English translation of Abstract of JP 59-101562.
Fortmann and Hitz, An Introduction to Linear Control Systems, Chapter 12, Marcel Dekler, Inc., 1977.
Akazaki Shusuke
Hasegawa Yusuke
Hirota Toshiaki
Kimura Eisuke
Komoriya Isao
Honda Giken Kogyo Kabushiki Kaisha
Nelli Raymond A.
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