Accumulator type fuel injection control system and the method th

Details Accumulator type fuel injection control system and the method th Accumulator type fuel injection control system and the method th

1997-09-18

1999-05-25

Miller, Carl S.

Internal-combustion engines

Charge forming device

Fuel injection system

123447, F02M 4500

Patent

active

059061880

ABSTRACT:
In an accumulator type fuel injection control system, a fuel pressure setting means determines a basic fuel injection pressure from both fuel injection volume and engine speed, and when the temperature of a fuel discharged to a fuel tank is high, a fuel pressure correcting means subtracts, from the basic fuel injection pressure, a pressure reduction quantity which has been set according to the fuel temperature. Further, a fuel injection timing correcting means adds, to a basic fuel injection timing, an advance quantity which has been set according to the pressure reduction quantity and thereby determines a corrected fuel injection timing. A fuel pressure control means controls the fuel pressure in a fuel pump in accordance with the corrected fuel injection pressure, and a fuel pressure control means controls the injection timing of an accumulator type unit injector in accordance with the corrected fuel injection timing, whereby a rubber hose and the fuel tank both included in a fuel return system are prevented from being damaged by the fuel of high temperature which returns to the fuel return system.

REFERENCES:
patent: 5313924 (1994-05-01), Regueiro
patent: 5476080 (1995-12-01), Brunnhofer
patent: 5622152 (1997-04-01), Ishida

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