Pressure-elevating type fuel injecting system

Details Pressure-elevating type fuel injecting system Pressure-elevating type fuel injecting system

2005-01-11

2005-01-11

Gimie, Mahmoud (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel injection system

C123S447000

Reexamination Certificate

active

06840224

ABSTRACT:
A pressure-elevating type fuel injecting system selectively injects via injectors fuel stored in a common rail or fuel whose pressure is elevated by a pressure elevating mechanism into a combustion chamber, and comprises a crank angle sensor producing crank pulse signals in accordance with operating states of an engine, a pulse interval calculating unit calculating pulse intervals between respective crank pulse signals, and a determination unit determining the malfunction of the pressure elevating mechanism when a variation of the pulse interval is above a determination threshold.

REFERENCES:
patent: 6112721 (2000-09-01), Kouketsu et al.
patent: 6192862 (2001-02-01), Tanabe et al.
patent: 6457453 (2002-10-01), Tanabe et al.
patent: 6499465 (2002-12-01), Mahr et al.
patent: 6520152 (2003-02-01), Mahr et al.

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