Engine air fuel ratio control system
Patent
·
OSTI ID:6672812
This patent describes a fuel supply control system for an internal combustion engine comprising air fuel ratio detecting means provided in engine exhaust passage means for detecting concentration of a component in engine exhaust gas and producing an air fuel ratio signal, engine operating condition detecting means for detecting engine operating condition and producing an engine operating condition signal, air fuel ratio reference means having predetermined values of air fuel ratio including at least one value leaner than a stoichiometric value and responsive to the engine operating conditions signal for producing a reference signal representing one of the predetermined values of air fuel ratio which is most desirable for the engine operating conditions, comparator means for comparing the air fuel ratio signal with the reference signal and producing a difference signal corresponding to a difference between the air fuel ratio signal and the reference signal, feedback control means for receiving the difference signal to adjust based on the difference signal by a predetermined amount a factor which affects the air fuel ratio of a mixture supplied to the engine so that the air fuel ratio becomes closer to the most desirable air fuel ratio means for changing the predetermined amount in accordance with the reference signal from the air fuel ratio reference means so that the predetermined amount is smaller for a value of the reference signal corresponding to a leaner value of the air fuel ratio.
- Assignee:
- Mazda Motor Corp., Hiroshima
- Patent Number(s):
- US 4773377
- OSTI ID:
- 6672812
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
COMPUTERIZED CONTROL SYSTEMS
CONTROL SYSTEMS
ENGINES
FEEDBACK
FUEL SYSTEMS
FUEL-AIR RATIO
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
OPERATION
SIGNAL CONDITIONING
330100* -- Internal Combustion Engines
99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
COMPUTERIZED CONTROL SYSTEMS
CONTROL SYSTEMS
ENGINES
FEEDBACK
FUEL SYSTEMS
FUEL-AIR RATIO
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
OPERATION
SIGNAL CONDITIONING