Device for variable adjustment of the timing of gas exchange valves of an internal combustion engine

Abstract

A device for the variable adjustment of the timing of gas exchange valves of an internal combustion engine, which has a hydraulic phase shifting device, a camshaft and a pressurizing distributor. The phase shift device can come into drive linkage with a crankshaft and is rigidly connected to the camshaft. A phase position of the camshaft relative to the crankshaft can be variably adjusted by the phase shift device. The interior of the camshaft has a cavity that communicates with one or more camshaft bearings which are separate from a rotating pressurizing means conveyor. The pressurizing distributor is disposed in a receiving area of the camshaft. The camshaft has an opening in the area of the pressurizing means distributor which with the interior of the camshaft and the rotating pressurizing conveyor. A pressurizing path is designed inside the camshaft which communicates with the opening and the hydraulic phase shift device.

1 - 14 . (canceled) 
     
     
         15 . A device for variable adjustment of timing of gas exchange valves of an internal combustion engine having a crankshaft, comprising:
 a hydraulic phase shifting device; a camshaft; a pressurizing medium distributor; and at least one camshaft bearing,   the phase shifting device being able to be brought into a drive connection with the crankshaft and being connected in a rotationally-fixed manner to the camshaft,   the phase shifting device being operative to variably adjust a phase location of the camshaft,   an interior of the camshaft having a receptacle in which the pressurizing medium distributor is arranged, a cavity, which communicates with the camshaft bearing that is formed separately from a rotating pressurizing medium conveyor, an opening in an area of the pressurizing medium distributor, which communicates on one side with the interior of the camshaft and on another side with the rotating pressurizing medium conveyor, and a pressurizing medium path formed inside the camshaft, the path includes a first pressurizing medium duct communicating on one side with the opening and on another side with the hydraulic phase shifting device, and   a second pressurizing medium duct at least partially formed by the pressurizing medium distributor and communicating on one side with the opening and on another side with the cavity.   
     
     
         16 . The device as claimed in  claim 15 , wherein the pressurizing medium distributor has a threaded section and the phase shifting device is fastenable on the camshaft via the threaded section. 
     
     
         17 . The device as claimed in  claim 15 , wherein the pressurizing medium distributor has a control valve, which can supply the phase shifting device with pressurizing medium. 
     
     
         18 . The device as claimed in  claim 15 , wherein the phase shifting device has a central opening and the pressurizing medium distributor penetrates the central opening of the phase shifting device. 
     
     
         19 . The device as claimed in  claim 15 , wherein a minimal passage surface of the second pressurizing medium duct is smaller than a minimal passage surface of the first pressurizing medium duct between the opening and the phase shifting device. 
     
     
         20 . The device as claimed in  claim 15 , wherein the second pressurizing medium duct is formed inside the pressurizing medium distributor. 
     
     
         21 . The device as claimed in  claim 15 , wherein the second pressurizing medium duct is formed on an interface between the cavity and the pressurizing medium distributor. 
     
     
         22 . The device as claimed in  claim 21 , wherein the second pressurizing medium duct is a longitudinal groove on an outer lateral surface of the pressurizing medium distributor. 
     
     
         23 . The device as claimed in  claim 21 , wherein the second pressurizing medium duct is formed as a longitudinal groove on an inner lateral surface of the camshaft in an area of the pressurizing medium distributor. 
     
     
         24 . The device as claimed in  claim 15 , wherein the second pressurizing medium duct has a throttle. 
     
     
         25 . The device as claimed in  claim 24 , wherein the throttle is formed by a separate component arranged in the second pressurizing medium duct. 
     
     
         26 . The device as claimed in  claim 15 , wherein the rotating pressurizing medium conveyor is a camshaft bearing. 
     
     
         27 . The device as claimed in  claim 15 , wherein the pressurizing medium path is at least partially formed by the pressurizing medium distributor. 
     
     
         28 . The device as claimed in  claim 15 , wherein a filter element is arranged in the second pressurizing medium duct.