Title:
【発明の名称】内燃機関のための燃料噴射装置
Document Type and Number:
Japanese Patent JP2001505976
Kind Code:
A
Abstract:
PCT No. PCT/DE98/00945 Sec. 371 Date Jun. 30, 1999 Sec. 102(e) Date Jun. 30, 1999 PCT Filed Apr. 3, 1998 PCT Pub. No. WO99/15783 PCT Pub. Date Apr. 1, 1999A fuel injection device for internal combustion engines is proposed in which a fuel injection valve is controlled by the pressure in a pressure chamber, which acts on a pressure shoulder in its opening and closing direction. The pressure supply to the a pressure chamber is controlled by a control valve member which in turn is moved by a pressure in a working chamber. The pressure in the working chamber is controlled by a pre-control valve which has a closing body which, through the influence of the piezoelectric drive mechanism, is moved from a second valve seat to a first valve seat and thereby momentarily opens a relief line of the working chamber. This movement results in an opening of the control valve member and a supplying of high fuel pressure to the pressure chamber for purposes of injection. Thus a very small pre-injection quantity is produced. In order to produce a main injection quantity, the closing body is positioned in an intermediate position between the valve seats and a longer connection of the high-pressure fuel supply to the pressure chamber is consequently produced.
Inventors:
Friedrich becking
Application Number:
JP51839399A
Publication Date:
May 08, 2001
Filing Date:
April 03, 1998
Export Citation:
Assignee:
ROBERT BOSCH GMBH
International Classes:
F02M51/00; F02M45/04; F02M45/08; F02M59/46; F02M61/16; F02M63/00; F02D41/20; (IPC1-7): F02M51/00; F02M45/08; F02M51/00; F02M61/16
Attorney, Agent or Firm:
Toshio Yano (3 outside)