Fuel supply apparatus having abnormality detecting function

Details Fuel supply apparatus having abnormality detecting function Fuel supply apparatus having abnormality detecting function

1996-09-03

1998-12-22

Moulis, Thomas N.

Internal-combustion engines

Charge forming device

With fuel pump

123198D, F02M 3704

Patent

active

058508180

ABSTRACT:
Electric current to a fuel pump in an engine fuel supply system is controlled so that a deviation in the number of pump rotations between a predetermined reference number of rotations of the fuel pump and an actual number of rotations thereof is within a predetermined range. When the deviation exceeds a predetermined range, it is determined that the fuel supply system is abnormal and at this time the operation of the fuel pump is limited. In this manner, the electric power consumed by the fuel pump is reduced because excess fuel is not circulated in the fuel supply system, thus accomplishing an improved reliability.

REFERENCES:
patent: 4827897 (1989-05-01), Yamada et al.
patent: 5284119 (1994-02-01), Smitley
patent: 5291578 (1994-03-01), Kalami
patent: 5345915 (1994-09-01), Schmitz-Huebsch et al.
patent: 5355859 (1994-10-01), Weber
patent: 5379741 (1995-01-01), Matysiewicz et al.
patent: 5406922 (1995-04-01), Tuckey
patent: 5555872 (1996-09-01), Takeuchi et al.

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