System and method for controlling fuel supply to a vehicular int

Details System and method for controlling fuel supply to a vehicular int System and method for controlling fuel supply to a vehicular int

1986-05-08

1987-09-22

Cuchlinski, Jr., William A.

Internal-combustion engines

Engine speed regulator

Responsive to deceleration mode

123493, F02D 4112

Patent

active

046947965

ABSTRACT:
A system and method for controlling a fuel supply to a vehicular internal combustion engine, in which a predetermined threshold value at which a fuel supply cutoff zone of the engine is initiated is varied so as to provide an optimum range of the fuel cutoff zone according to a magnitude of the engine deceleration and the variation of the predetermined threshold value is learned and stored for the subsequent use as the predetermined threshold value to cope with a characteristic change of the system including the engine and engine output power transmission. When the magnitude of the engine deceleration is large, the predetermined threshold value is increased so as to avoid repetition of fuel supply cutoff and fuel supply resumption which affects adversely the engine driveability. When the magnitude is small, the predetermined threshold value is decreased i.e., made closer to another predetermined threshold value at which a fuel supply recovery is carried out so as to extend the fuel supply cutoff zone.

REFERENCES:
patent: 4285314 (1981-08-01), Kiencke et al.
patent: 4416230 (1983-11-01), Katayose et al.
patent: 4434759 (1984-03-01), Iezuka et al.
patent: 4572126 (1986-02-01), Arnold et al.
patent: 4599695 (1986-07-01), Deutsch

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