EP 0896144 A3 20000712 - Fuel injection control apparatus for an accumulator type engine
Title (en)
Fuel injection control apparatus for an accumulator type engine
Title (de)
Kraftstoffeinspritzungsteuergerät für eine Brennkraftmaschine mit Kraftstoffspeicherleitung
Title (fr)
Dispositif de commande d'injection de combustible pour moteur à combustion interne à accumulateur
Publication
Application
Priority
JP 20918097 A 19970804
Abstract (en)
[origin: EP0896144A2] A fuel injection control apparatus for an accumulator type engine (1) efficiently reduces fuel pressure in an accumulator pipe (4) if the fuel pressure exceeds a target pressure, thereby ensuring stable combustion. Injectors (2) of a diesel engine (1) are connected to a common rail (4) provided commonly for all the cylinders (#1-#4) of the engine. The common rail (4) is connected to a supply pump (6) by a supply pipe (5). Each injector (2) has a mechanism that injects fuel into the corresponding one of the cylinders (#1-#4) when an electromagnetic valve (3) provided in the injector (2) is driven, and that releases fuel to reduce the fuel pressure in the common rail (4) during an early period (ineffective injection time) after the start of the driving of the electromagnetic valve (3). An electronic control unit (51) executes an ineffective injection control during the ineffective injection control time to reduce the fuel pressure in the common rail (4), if the target injection amount is "0" and the actual fuel pressure is greater than the target fuel pressure. The ineffective injection control time is set to greater values as the fuel temperature decreases. <IMAGE>
IPC 1-7
IPC 8 full level
F02D 41/06 (2006.01); F02D 41/38 (2006.01); F02D 41/40 (2006.01); F02M 47/02 (2006.01); F02M 63/02 (2006.01); F02B 3/06 (2006.01); F02D 41/12 (2006.01)
CPC (source: EP)
F02D 41/3827 (2013.01); F02D 41/3872 (2013.01); F02M 47/027 (2013.01); F02M 63/0225 (2013.01); F02B 3/06 (2013.01); F02D 41/123 (2013.01)
Citation (search report)
- [XY] WO 9619659 A1 19960627 - BOSCH GMBH ROBERT [DE], et al
- [Y] US 4955345 A 19900911 - BROWN DAVID B [US], et al
- [Y] JP H0988669 A 19970331 - MITSUBISHI MOTORS CORP & US 5906188 A 19990525 - NAKAMURA SADAO [JP], et al
- [A] PATENT ABSTRACTS OF JAPAN vol. 014, no. 478 (M - 1036) 18 October 1990 (1990-10-18)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0896144 A2 19990210; EP 0896144 A3 20000712; JP 3546285 B2 20040721; JP H1150899 A 19990223
DOCDB simple family (application)
EP 98114568 A 19980803; JP 20918097 A 19970804