Common rail fuel injection system

Details Common rail fuel injection system Common rail fuel injection system

2006-12-05

2006-12-05

Gimie, Mahmoud (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel injection system

C123S1980DA

Reexamination Certificate

active

07143747

ABSTRACT:
A control unit for controlling fuel pressure in a common rail comprises a pressure sensor for detecting fuel pressure in the common rail, a decreased amount presuming means for calculating a presumed decreased amount (PC1) of the common rail fuel pressure, and a first determination means for comparing the detected decreased amount (PC2) of the common rail fuel pressure with the presumed decreased amount (PC1), in order to determine whether any abnormal condition is in the outputs from the pressure sensor. Therefore, the malfunction of the pressure sensor or any abnormal conditions included in the outputs from the pressure sensor can be detected even during the engine operation.

REFERENCES:
patent: 6234148 (2001-05-01), Hartke et al.
patent: 6526948 (2003-03-01), Stavnheim et al.
patent: 6712047 (2004-03-01), Rueger
patent: 6871633 (2005-03-01), Date et al.
patent: 6928880 (2005-08-01), Kang et al.
patent: 2005/0005912 (2005-01-01), Joos et al.
patent: 2003-222045 (2003-08-01), None

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