Internal-combustion engines – Charge forming device – Fuel injection system
Patent
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:
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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.
Samuel James J.
Tingey Albert R.
Argenbright Tony M.
Lucas Industries Public Limited Company
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