Internal-combustion engines – Charge forming device – Including exhaust gas condition responsive means
Patent
1996-06-17
1998-03-24
Dolinar, Andrew M.
Internal-combustion engines
Charge forming device
Including exhaust gas condition responsive means
F02D 4114
Patent
active
057301115
ABSTRACT:
An air-fuel ratio control system for an internal combustion engine includes an air-fuel ratio sensor provided at a collecting portion of an exhaust manifold. The air-fuel ratio sensor monitors an exhaust gas and changes its output in a linear fashion relative to an air-fuel ratio represented by the exhaust gas. The air-fuel ratio sensor is arranged at a position such that, after the number of strokes, corresponding to a multiple of the number of all cylinders, from a fuel injection for each cylinder, the air-fuel ratio sensor can measure an air-fuel ratio caused by the corresponding fuel injection. The system stores a target fuel amount for each of the cylinders. The system derives a feedback correction value depending on a deviation between a fuel amount introduced into the corresponding cylinder, which is derived based on the air-fuel ratio monitored by the air-fuel ratio sensor, and the stored number-of-stroke prior target fuel amount.
REFERENCES:
patent: 4934328 (1990-06-01), Ishii et al.
patent: 5090199 (1992-02-01), Ikuta et al.
patent: 5243952 (1993-09-01), Ikuta et al.
Iida Hisashi
Kaji Yasumasa
Okamoto Yoshiyuki
Dolinar Andrew M.
Nippondenso Co. Ltd.
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