The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 06, 1992
Filed:
Nov. 30, 1990
Nunzio D'Alfonso, Nuremberg, DE;
MAN Nutzfahrzeuge AG, Munich, DE;
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.