System and method for controlling fuel supply to internal combus

Details System and method for controlling fuel supply to internal combus System and method for controlling fuel supply to internal combus

1990-12-12

1992-09-15

Argenbright, Tony M.

Internal-combustion engines

Engine speed regulator

Responsive to deceleration mode

123493, F02D 4112

Patent

active

051468913

ABSTRACT:
A system and method for controlling an operation of an internal combustion engine of a vehicle having an automatic transmission in which at least one of predetermined fuel supply recovery engine revolution speed or predetermined fuel supply cut-off engine revolution speed is varied during the engine deceleration condition according to a state of operation of the automatic transmission. In the first preferred embodiment, a downshift operation of the automatic transmission is detected. In the second preferred embodiment, an overrun clutch solenoid is turned on (energized). In the latter case, both fuel supply recovery and fuel supply cut-off engine revolution speeds are set to higher values than those when the clutch solenoid is turned off (deenergized).

REFERENCES:
patent: 4221191 (1980-09-01), Asano et al.
patent: 4387681 (1983-06-01), Ikeura et al.
patent: 4508088 (1985-04-01), Hasegawa et al.
patent: 4694796 (1987-09-01), Mori
patent: 4790275 (1988-12-01), Iida
patent: 4841447 (1989-06-01), Hayashi et al.

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