FUEL INJECTION DEVICE

PROBLEM TO BE SOLVED: To detect abnormal output at an early stage even if the abnormal output occurs either in a high output side or a low output side in relation to a rail pressure sensor 7 for a fuel injection device 1. SOLUTION: Since command injection quantity during idling can be estimated to b...

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Bibliographische Detailangaben
Hauptverfasser:	KAWAGUCHI YOSHIO, KUSAJI HIDESHI
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MECHANICAL ENGINEERING SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To detect abnormal output at an early stage even if the abnormal output occurs either in a high output side or a low output side in relation to a rail pressure sensor 7 for a fuel injection device 1. SOLUTION: Since command injection quantity during idling can be estimated to be calculated as roughly fixed value, a microcomputer determines that abnormal output of the rail pressure sensor 7 occurs when a current value of the command injection quantity during idling is calculated as a value clearly different from values calculated in a past. Consequently, abnormal output can be detected at the early stage during idling operation even if abnormal output of the rail pressure sensor 7 occurs either in the high output side or in the low output side. COPYRIGHT: (C)2007,JPO&INPIT