Electronic control system for an IC engine

Details Electronic control system for an IC engine Electronic control system for an IC engine

1988-02-03

1989-07-18

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Fuel injection system

123440, F02D 4114

Patent

active

048483001

ABSTRACT:
In an engine management system which stores a control value and increments or decrements this according to whether an oxygen sensor in the exhaust system indicates that the engine is running lean or rich and which controls the duration of pulses applied to fuel injectors of the engine according to the stored control value, a compensating adjustment is determined and applied to the pulse length duration in order to maintain the mark/space ratio of the indicating signal from the oxygen sensor at an optimum value. This avoids unacceptable exhaust emissions which might otherwise occur under some conditions.

REFERENCES:
patent: 4177787 (1979-12-01), Hattori et al.
patent: 4228775 (1980-10-01), Schweikert
patent: 4300505 (1981-11-01), Takada et al.
patent: 4402292 (1983-09-01), Ohgami et al.
patent: 4461258 (1984-07-01), Becker et al.
patent: 4522180 (1985-06-01), Matsuoka et al.
patent: 4733358 (1988-03-01), Abthoff et al.
patent: 4739740 (1988-04-01), Ohkawara et al.

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