Method and device for controlling an electrohydraulic unit...

Details Method and device for controlling an electrohydraulic unit... Method and device for controlling an electrohydraulic unit...

2006-05-16

2006-05-16

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Hydraulic system

C123S090110, C123S090130

Reexamination Certificate

active

07044092

ABSTRACT:
A method for controlling an electrohydraulic unit for actuating the valves of an endothermic engine, in which the electrohydraulic unit is provided with a hydraulic actuator for opening the respective valve with a pressurized liquid, and a spring that is antagonistic to the hydraulic actuator in order to close the valve, provides for the control of the connection time between the hydraulic actuator and a first branch containing the pressurized liquid as a function of a predetermined time characteristic of the electrohydraulic unit.

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patent: 6739293 (2004-05-01), Turner et al.
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patent: 6886510 (2005-05-01), Sun et al.
patent: 2002/0157650 (2002-10-01), Gassler et al.
patent: 3 741 214 (1989-06-01), None
patent: 0 647 770 (1995-04-01), None
patent: 03/008794 (2003-01-01), None
European Search Report for EP 04 10 2847 (Sep. 21, 2004).

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