Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1988-03-18
1990-03-27
Dolinar, Andrew M.
Internal-combustion engines
Charge forming device
Fuel injection system
123480, F02D 4114
Patent
active
049111299
ABSTRACT:
An air/fuel ratio control system employs an altitude dependent learnt uniform correction coefficient which is applicable for all engine driving range and another engine driving range based correction coefficient learnt with respect to responsive engine driving range. The uniform correction coefficient is cyclically updated on engine driving range based correction coefficient. The control system performs FEEDBACK mode air/fuel ratio control with the learnt uniform correction coefficient and the engine driving range based correction coefficient. On the other hand, the control system performs OPEN LOOP mode air/fuel ratio control with the learnt uniform correction coefficient.
REFERENCES:
patent: 4306529 (1981-12-01), Chiesa et al.
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patent: 4365299 (1982-12-01), Kondo et al.
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patent: 4498445 (1985-02-01), Hasegawa et al.
patent: 4517948 (1985-05-01), Kaji et al.
SAE Paper No. 860594, 1986, pp. 3.733-3.741, "Development of a High-Speed High-Precision Learning Control System for the Engine Control", Naoki Tomisawa, Horomasa Kubo and Shoji Furuhashi.
Dolinar Andrew M.
Japan Electronics Control Systems Company, Ltd.
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