Fuel supply cut-off control system for engine of an automotive v

Details Fuel supply cut-off control system for engine of an automotive v Fuel supply cut-off control system for engine of an automotive v

1988-01-25

1988-12-13

Nelli, Raymond A.

Internal-combustion engines

Engine speed regulator

Responsive to deceleration mode

123493, F02D 4112, F02D 502

Patent

active

047902752

ABSTRACT:
A system for cutting off the supply of fuel to an automobile engine in a specific operating region within the deceleration region of the engine determines whether the engine transmission is manual or automatic. The system has for each of the manual transmission and automatic transmission, a fuel cut-off rpm at which the supply of fuel is cut off when sensed engine rpm is greater than the fuel cut-off rpm, and a fuel restoration rpm, which is set to be less than the fuel cut-off rpm, at which the fuel supply is resumed when sensed engine rpm is less than the fuel restoration rpm. The system sets, as the specific operating region in which the supply of fuel is cut off, a region in which engine rpm is greater than the fuel cut-off rpm and engine load is less than prescribed, changes over the fuel cut-off rpm and the fuel restoration rpm between that for the manual transmission and that for the automatic transmission in dependence upon the determination, and sets the width between the fuel cut-off rpm and fuel restoration rpm for the automatic transmission to be greater than the width between the fuel cut-off rpm and fuel restoration rpm for the manual transmission.

REFERENCES:
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patent: 4510902 (1985-04-01), Tsuchida et al.
patent: 4527521 (1985-07-01), Hasagawa et al.
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patent: 4558672 (1985-12-01), Boccadoro et al.
patent: 4565174 (1986-01-01), Suzuki et al.
patent: 4597370 (1986-07-01), Yasuoka et al.
patent: 4628883 (1986-12-01), Kataoka
patent: 4656988 (1987-04-01), Fukuba et al.
patent: 4696278 (1987-09-01), Ito et al.
patent: 4714064 (1987-12-01), Imazu

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