Fuel injection control system for internal combustion engine

Details Fuel injection control system for internal combustion engine Fuel injection control system for internal combustion engine

1993-04-30

1995-02-14

Nelli, Raymond A.

Internal-combustion engines

Charge forming device

Including exhaust gas condition responsive means

123359, F02D 3100

Patent

active

053885627

ABSTRACT:
In a fuel injection system for a vehicle engine, the fuel injection is controlled in a feedback mode when no abnormality occurs in the control system, and it is controlled in an open loop mode by a limp home circuit when any abnormality in the control system is detected by a watch dog timer. The vehicle may thus be slowly driven to a safe or proper place for servicing. The limp home circuit includes fuel cutoff means for interrupting the fuel supply to the engine in the open loop mode of operation when the rotational speed of the engine exceeds a predetermined value.

REFERENCES:
patent: 4509480 (1985-04-01), Kull et al.
patent: 4515125 (1985-05-01), Buck et al.
patent: 4534328 (1985-08-01), Fischer et al.
patent: 4629907 (1986-12-01), Kosak
patent: 4638781 (1987-01-01), Shiki et al.
patent: 4805576 (1989-02-01), Abe et al.
patent: 4823751 (1989-04-01), Pfalzgraf et al.
patent: 4905645 (1990-03-01), Bonse et al.

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