Internal-combustion engines – Poppet valve operating mechanism – Hydraulic system
Patent
1990-11-30
1992-10-06
Kamen, Noah P.
Internal-combustion engines
Poppet valve operating mechanism
Hydraulic system
F01L 902
Patent
active
051522586
ABSTRACT:
The present invention relates to a hydraulic control device for poppet valves of combustion engines. In order to increase the braking power of combustion engines it is desirable to vary the poppet valve opening times independent of the movement of the cam. According to the present invention a connecting line is provided between the cam input piston that is actuated by the cam and the valve-actuating piston of the poppet valve. A further control line is branched off that connecting line and leads to a control unit which opens or closes the connection between the control line and the recycling line. The cam input piston itself may serve as the control piston and also open or close the connecting line to the recycling line in order to open and close the poppet valve.
Kamen Noah P.
MAN Nutzfahrzeuge AG
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