Title:
【発明の名称】燃料噴射ポンプ
Document Type and Number:
Japanese Patent JPH10508358
Kind Code:
A
Abstract:
PCT No. PCT/DE96/00612 Sec. 371 Date Apr. 28, 1997 Sec. 102(e) Date Apr. 28, 1997 PCT Filed Mar. 29, 1996 PCT Pub. No. WO97/08454 PCT Pub. Date Mar. 6, 1997A fuel injection pump for internal combustion engines, which includes at least one pump piston driven by a cam drive mechanism to carry out a feed stroke and an intake stroke. The pump includes a fuel filled storage chamber that is under storage pressure and is for aspirating fuel in the intake stroke and for feeding excess fuel at the end of the feed stroke to a tank. A fluid filled drive mechanism chamber under lubrication pressure, contains the cam drive mechanism and is divided from the intake chamber by a movable wall. A vacuum chamber is disposed in the fluid filled drive mechanism chamber in order to damp pressure oscillations in the drive mechanism chamber, the vacuum chamber is at least partially defined by a membrane that is acted upon by the lubrication pressure. The rigidity of the membrane is designed so that its effectiveness comes into play only when there is a pressure load that is slightly greater than the stationary lubrication pressure in the drive mechanism chamber (22).
Inventors:
Wolfgang Fehlmann
Application Number:
JP50966897A
Publication Date:
August 18, 1998
Filing Date:
March 29, 1996
Export Citation:
Assignee:
ROBERT BOSCH GMBH
International Classes:
F02M41/14; F02M55/04; F02M63/00; F04B1/04; (IPC1-7): F02M41/14; F02M55/04; F02M63/00
Attorney, Agent or Firm:
Toshio Yano (3 outside)