Title:
ガス交換弁を制御するための装置
Document Type and Number:
Japanese Patent JP2005532496
Kind Code:
A
Abstract:
A device for controlling gas-exchange valves of an internal combustion engine is provided, which device has hydraulic valve actuators each allocated to one gas-exchange valve. Each valve actuator has an actuating piston acting on the gas-exchange valve, and two hydraulic working chambers delimited by the actuating piston, of which the first working chamber acting upon the gas-exchange valve in the closing direction is constantly filled with fluid under pressure, and the second working chamber acting upon the gas-exchange valve in the opening direction is able to be alternately filled with fluid under pressure and relieved via two electric control valves. For the purpose of cost reduction, provided for each valve-actuator pair is a single first electric control valve that is acted upon with the fluid pressure on the intake side, and is connected on the outlet side to the second working chamber of one valve actuator. The second working chamber of the other valve actuator is filled with fluid with the aid of a switchover valve and the fluid pressure in the second working chamber of the one valve actuator.
Inventors:
Udo Deal
Bernd Rosenau
Christian grose
Jimon Keiser
Ralph Engelberg
Bernd Rosenau
Christian grose
Jimon Keiser
Ralph Engelberg
Application Number:
JP2004518373A
Publication Date:
October 27, 2005
Filing Date:
March 05, 2003
Export Citation:
Assignee:
ROBERT BOSCH GMBH
International Classes:
F01L9/10; (IPC1-7): F01L9/02
Attorney, Agent or Firm:
Toshio Yano
Einzel Felix-Reinhard
Reinhard Einsel
Einzel Felix-Reinhard
Reinhard Einsel