Global Patent Index - EP 1031721 A2

EP 1031721 A2 2000-08-30 - Fuel pressure control device for high pressure fuel injection system

Title (en)

Fuel pressure control device for high pressure fuel injection system

Title (de)

Krafstoffdrucksteuervorrichtung für Hochdruckkraftstoffeinspritzsystem

Title (fr)

Dispositif de commande de pression pour système d'injection de carburant à haute pression

Publication

EP 1031721 A2 (EN)

Application

EP 00102054 A

Priority

JP 4619799 A

Abstract (en)

In a fuel pressure control apparatus for a high-pressure fuel injection system provided with a common rail (15), a supply pump (13) for force-feeding fuel to the common rail, and a fuel injection valve (17) attached to each cylinder of a diesel engine (1) and connected at one end to the common rail (15), an attempt is made to securely reduce a surplus of fuel pressure making use of a limited period during which normal fuel injection is not carried out. In exclusively performing pressure-release of fuel in the common rail (15) by driving the fuel injection valve (17) within an invalid injection period, the fuel injection valve (17) is driven in a cycle that does not depend on an operational condition of the engine (1), while adjusting a timing for driving the fuel injection valve (17) in such a manner as to prevent interference with the normal fuel injection control. <IMAGE>

IPC 1-7 (main, further and additional classification)

F02D 41/38; F02D 41/40

IPC 8 full level (invention and additional information)

F02M 37/00 (2006.01); F02D 41/38 (2006.01); F02M 55/02 (2006.01); F02B 3/06 (2006.01); F02D 41/12 (2006.01)

CPC (invention and additional information)

F02D 41/3872 (2013.01); F02B 3/06 (2013.01); F02D 41/123 (2013.01); F02D 2200/0602 (2013.01); F02D 2250/31 (2013.01)

Citation (applicant)

JP H02191865 A 19900727 - NIPPON DENSO CO

Designated contracting state (EPC)

DE ES FR GB IT

EPO simple patent family

EP 1031721 A2 20000830; EP 1031721 A3 20030409; EP 1031721 B1 20050112; DE 60017299 D1 20050217; DE 60017299 T2 20050602; ES 2232335 T3 20050601; JP 2000248983 A 20000912; JP 4122615 B2 20080723

INPADOC legal status


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2006-01-04 [26N] NO OPPOSITION FILED

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2005-10-28 [ET] FR: TRANSLATION FILED

2005-06-01 [REG ES FG2A] DEFINITIVE PROTECTION

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