Title:
【発明の名称】高圧ポンプ内の燃料導入圧を制御するバルブシステム
Document Type and Number:
Japanese Patent JP2003515701
Kind Code:
A
Abstract:
The capacity of a high-pressure pump (6) is regulated by a valve system including a variable-capacity on-off valve (23) and an overpressure valve (31). The overpressure valve has a valve body (33) having a cylindrical wall (35) forming a cavity (34) in which slides a shutter (37) having a lateral wall (51) and an end wall (52). The shutter (37) is pushed into a closed position by a calibrated spring (58). The cylindrical wall (35) has first holes (44) for allowing the passage of enough fuel to lubricate the inside of the pump (6), and second holes (47) for supplying the pump (6) via a supply conduit (68) and for draining any surplus fuel into a recirculating conduit (32). The first holes (44) and the second holes (47) are opened by different displacements of the lateral wall (51) of the shutter (37); and the end wall (52) has a calibrated air vent hole (64).
Inventors:
Demata Ace Sisto Luigi
Application Number:
JP2001542689A
Publication Date:
May 07, 2003
Filing Date:
November 29, 2000
Export Citation:
Assignee:
ROBERT BOSCH GMBH
International Classes:
F02M59/06; F02M59/08; F02M59/34; F02M59/44; F02M59/46; F02M63/02; F02M69/54; F04B1/04; F04B1/06; F04B1/07; F04B49/00; F04B49/24; F04B53/10; F16K17/04; (IPC1-7): F04B53/10; F02M59/06; F02M59/34; F02M59/44; F02M59/46; F04B1/06; F04B1/07; F04B49/00
Foreign References:
| WO1999020894A1 | 1999-04-29 | |||
| WO1999056016A1 | 1999-11-04 |
Attorney, Agent or Firm:
Eiji Saegusa (8 others)