Global patent index - EP 1041273 A1

EP 1041273 A1 2000-10-04 - FUEL INJECTION PUMP

Title (en)

FUEL INJECTION PUMP

Title (de)

KRAFTSTOFFEINSPRITZPUMPE

Title (fr)

POMPE D'INJECTION DE CARBURANT

Publication

EP 1041273 A1 (EN)

Application

EP 98961436 A

Priority

  • JP 9805764 W
  • JP 35091797 A
  • JP 35091897 A

Abstract (en)

A fuel injection pump for a diesel engine for attaining a specially excellent combustion performance, specifically comprising a notch part (20) formed in the retraction collar (16) of a delivery valve (3), in addition to an Angleich cut(17), to increase the communicating area of a fuel path (18) between a high pressure chamber (7) and a force-feed chamber (11) according to the lift of the delivery valve (3) so as to suppress the retraction effect of the delivery valve (3) in order to prevent a residual pressure in the high pressure chamber (7) from excessively reducing particularly during high idling. An annular groove (54) communicating with a lower lead (52) is formed in the outer peripheral surface of a plunger (50), and a part of fuel inside the force-feed chamber (11) is returned, during force-feed process, to a fuel feed port (13) through the annular groove (54) so as to increase the length of an injection period in low and medium speed ranges to reduce combustion noises, and to delay the injection timing under low idle condition to reduce the emission of blue white smoke. <IMAGE>

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

F02M 59/46; F02M 59/26

IPC 8 full level (invention and additional information)

F02M 59/26 (2006.01); F02M 59/46 (2006.01)

CPC (invention and additional information)

F02M 59/462 (2013.01); F02M 59/265 (2013.01)

Citation (search report)

See references of WO 9932787A1

Designated contracting state (EPC)

DE FR IT NL

EPO simple patent family

WO 9932787 A1 19990701; EP 1041273 A1 20001004

INPADOC legal status

2002-02-27 [18W] WITHDRAWN

- Ref Legal Event Code: 18W

- Date of withdrawal: 20011227

2000-10-04 [17P] REQUEST FOR EXAMINATION FILED

- Ref Legal Event Code: 17P

- Effective date: 20000613

2000-10-04 [AK] DESIGNATED CONTRACTING STATES:

- Ref Legal Event Code: AK

- Designated State(s): DE FR IT NL