Device for hydraulic valve lift switching

Details Device for hydraulic valve lift switching Device for hydraulic valve lift switching

2007-02-20

2007-02-20

Denion, Thomas (Department: 3748)

Internal-combustion engines

Poppet valve operating mechanism

Hydraulic system

C123S090130, C123S090150, C251S129100, C251S129160

Reexamination Certificate

active

10852653

ABSTRACT:
The invention relates to a device for electrohydraulic valve lift switching with a hydraulically activatable actuating element for bringing about valve lift switching, which is connected to an oil line, whereby the action of pressurized oil on the actuating element can be controlled by an on/off valve arranged in the oil line and connected to a control device. The invention has an oil pressure metering device arranged in the oil line, which is connected to the control device, and a device for detecting the time period between activation of the on/off valve by the control device and a characteristic change in the measured oil pressure.

REFERENCES:
patent: 6092495 (2000-07-01), Hackett
patent: 02042107 (1990-02-01), None
Der neue Motor des Porsche 911 Turbo, MTZ Motortechnische Zeitschrift 61, 2001, pp. 730-743.

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