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Title:
INJECTION VALVE
Document Type and Number:
WIPO Patent Application WO/2002/077437
Kind Code:
A1
Abstract:
The invention relates to an injection valve, in particular an injection valve for an internal combustion engine. Said valve comprises a nozzle module (3) that has an injection nozzle and a supply line for a fluid that is held at a supply pressure (p_R), in addition to a valve control module (2), which interacts with the nozzle module (3) and has at least one valve closing member (16), on which the supply pressure (p_R) acts and a piezoelectric actuator (12), which actuates the valve closing member (16) and is pre-tensioned by means of a spring (21) in the direction facing away from the valve closing member (16). The piezoelectric actuator (12) is controlled using a valve control unit (30) and the latter predetermines a control gradient (dU/dt). The control gradient (dU/dt) is a variable that is dependent on the supply pressure (p_R).

Inventors:
RUEGER JOHANNES-JOERG (DE)
STOECKLEIN WOLFGANG (DE)
SCHMIEDER DIETMAR (DE)
Application Number:
PCT/DE2002/001025
Publication Date:
October 03, 2002
Filing Date:
March 21, 2002
Export Citation:
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Assignee:
BOSCH GMBH ROBERT (DE)
RUEGER JOHANNES-JOERG (DE)
STOECKLEIN WOLFGANG (DE)
SCHMIEDER DIETMAR (DE)
International Classes:
F02D41/20; F02M47/02; F02M51/00; F02M59/46; F02M51/06; F02M61/20; H01L41/083; H01L41/09; F02M63/00; (IPC1-7): F02M51/06; F02M59/46; F02M47/02
Foreign References:
DE19848950A12000-04-27
DE4306072A11994-09-08
US6082332A2000-07-04
DE19945670A12001-04-05
Other References:
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 02 26 February 1999 (1999-02-26)
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 11 30 September 1998 (1998-09-30)
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