Optimum ignition and A/F control for internal-combustion engine

Details Optimum ignition and A/F control for internal-combustion engine Optimum ignition and A/F control for internal-combustion engine

1983-05-03

1985-03-05

Lall, Parshotam S.

Internal-combustion engines

Charge forming device

Fuel injection system

123419, 123436, 123480, F02P 500

Patent

active

045024421

ABSTRACT:
A method and an apparatus in which an engine is controlled by a microcomputer on the basis of a basic ignition advanced angle, an ignition advanced angle unit-correction value and a supplied air quantity unit-correction value stored in maps for providing a best fuel consumption corresponding to each of various running conditions such as an intake air quantity, engine revolution number, and the like, as well as on the basis of correction factors corresponding to running conditions such as stable running and unstable running. In order to obtain a best fuel consumption in a stable running state, the ignition advanced angle and the supplied air quantity are parallelly corrected by the ignition advanced angle unit-correction value and the supplied air quantity unit-correction value respectively while discriminating increment of torque so that this correction is successively repeated until a best fuel consumption is reached. The ignition advanced angle correction factors and the air quantity correction factors are stored, updating the previously stored data, on the basis of the respective total correction values searched by the successively repeated corrections.

REFERENCES:
patent: 3142967 (1964-08-01), Schweitzer
patent: 3596643 (1971-08-01), Schweitzer
patent: 4026251 (1977-05-01), Schweitzer et al.
patent: 4286560 (1981-09-01), Sagisaka et al.
patent: 4357662 (1982-11-01), Schira et al.
patent: 4379333 (1983-04-01), Ninomiya et al.
patent: 4403584 (1983-09-01), Suzuki et al.

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