Title:
HYDRAULIC CONTROL DEVICE, IN PARTICULAR FOR AN INJECTOR
Document Type and Number:
WIPO Patent Application WO2001029395
Kind Code:
A3
Abstract:
The invention relates to a hydraulic control device (60), in particular for an injector (16) in an automative fuel injection system (10). Known control devices have a piezoelectric actuator. Said actuator controls an A-valve type directional control valve (75) having a valve member (74) inserted into a valve bore (76). According to the invention, a translator (62) which reverses the ejection movement of said actuator (52) is placed between said actuator (52) and the valve member (74). A directional control valve (75) is provided as a 3/2 directional valve which opens to the inside. The valve member (74) of said valve alternately opens or interrupts hydraulic connections between hydraulic channels (86, 88, 92) by cooperating with a valve seat (98) and a control edge (96).
Inventors:
BOECKING FRIEDRICH (DE)
Application Number:
PCT/DE2000/003590
Publication Date:
December 27, 2001
Filing Date:
October 12, 2000
Export Citation:
Assignee:
BOSCH GMBH ROBERT (DE)
BOECKING FRIEDRICH (DE)
BOECKING FRIEDRICH (DE)
International Classes:
F02M47/02; F02M51/06; F02M47/00; F02M61/16; F02M63/00; (IPC1-7): F02M59/46; F02M47/02
Foreign References:
| DE19803910A1 | 1998-11-12 | |||
| DE19519192C1 | 1996-06-05 |
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