EP 1304471 A2 20030423 - Fuel pressure control apparatus
Title (en)
Fuel pressure control apparatus
Title (de)
Einrichtung zur Brennstoffdrucksteuerung
Title (fr)
Dispositif de commande de pression de combustible
Publication
Application
Priority
- EP 00102392 A 20000203
- JP 4135899 A 19990219
Abstract (en)
The present invention proposes a fuel pressure control apparatus for a high-pressure fuel injection system which sufficiently reduces a fuel pressure in an accumulator line (20) while preventing the high-pressure fuel injection system from being adversely affected. The fuel pressure control apparatus for the high-pressure fuel injection system is equipped with an accumulator line (20) for accumulating fuel supplied from a fuel pump (30) at a high pressure and supplying the fuel to fuel injection valves (12), and with a relief valve (22) for discharging fuel in the accumulator line (20). Furthermore, the apparatus is equipped with fuel pressure control means (68) for detecting a fuel pressure in the accumulator line (20) and driving the relief valve (22) so as to reduce the fuel pressure in accordance with a pressure reduction requirement based on a comparison between the detected fuel pressure and a target pressure. An electronic control unit (60) determines a detection timing of the fuel pressure in such a manner as to prevent a period during which the fuel pump (30) force-feeds fuel from overlapping with the detection timing of the fuel pressure by detection means (68). <IMAGE>
IPC 1-7
IPC 8 full level
F02D 41/38 (2006.01); F02D 41/40 (2006.01); F02M 37/00 (2006.01); F02M 55/02 (2006.01)
CPC (source: EP)
F02D 41/3827 (2013.01); F02D 41/3845 (2013.01); F02D 41/3863 (2013.01); F02D 41/3872 (2013.01); F02D 2041/389 (2013.01); F02D 2200/0602 (2013.01); F02D 2250/14 (2013.01); F02D 2250/31 (2013.01)
Citation (applicant)
- JP H09209870 A 19970812 - ZEXEL CORP
- US 5727525 A 19980317 - TSUZUKI YOSHIHIRO [JP]
- JP H1054318 A 19980224 - DENSO CORP
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
EP 1030048 A2 20000823; EP 1030048 A3 20020327; EP 1030048 B1 20041229; DE 60016989 D1 20050203; DE 60016989 T2 20050609; DE 60022233 D1 20050929; DE 60022233 T2 20060309; EP 1304470 A2 20030423; EP 1304470 A3 20040519; EP 1304470 B1 20050824; EP 1304471 A2 20030423; EP 1304471 A3 20040519; ES 2232336 T3 20050601; ES 2243809 T3 20051201; JP 2000240494 A 20000905; JP 4023020 B2 20071219
DOCDB simple family (application)
EP 00102392 A 20000203; DE 60016989 T 20000203; DE 60022233 T 20000203; EP 03001463 A 20000203; EP 03001464 A 20000203; ES 00102392 T 20000203; ES 03001463 T 20000203; JP 4135899 A 19990219