Valve lift adjustment arrangement for a mechanically controllable valve drive arrangement, and method for aligning an intermediate lever arrangement

Abstract

A valve lift adjustment arrangement for a mechanically-controllable valve drive arrangement includes a bearing shaft, a first roller, a second roller arranged on the bearing shaft, a camshaft arrangement, a valve lift adjustment device comprising a rotatable eccentric shaft, an intermediate lever arrangement, and a device. The intermediate lever arrangement comprises an intermediate lever with a working curve. The intermediate lever is mounted via the first roller to be movable in a slotted-guide track and to be operatively connected to the camshaft arrangement and to the valve lift adjustment device. The device is configured so that the second roller is eccentrically mounted. The device comprises a tool engagement point which aligns the second roller and thereby the intermediate lever arrangement. The camshaft arrangement acts, via the first roller, on the intermediate lever arrangement. The rotatable eccentric shaft is acts, via the second roller, on the intermediate lever arrangement.

What is claimed is: 
     
         1 - 12 . (canceled) 
     
     
         13 . A valve lift adjustment arrangement for a mechanically-controllable valve drive arrangement, the valve lift adjustment arrangement comprising:
 a bearing shaft;   a first roller;   a second roller arranged on the bearing shaft;   a camshaft arrangement;   a valve lift adjustment device comprising a rotatable eccentric shaft;   at least one intermediate lever arrangement comprising at least one intermediate lever comprising a working curve, the at least one intermediate lever being mounted, at least via the first roller, so as to be movable in a slotted-guide track and to be operatively connected to the camshaft arrangement and to the valve lift adjustment device; and   a device configured so that the second roller is eccentrically-mounted, the device comprising a tool engagement point configured to align the second roller and thereby the at least one intermediate lever arrangement so that a circumferential point of the second roller, in the case of a rotation through an angle α, describes an arc shape which deviates from a circular arc,   wherein,   the camshaft arrangement is configured to act, via the first roller, on the at least one intermediate lever arrangement, and   the rotatable eccentric shaft is configured to act, via the second roller, on the at least one intermediate lever arrangement.   
     
     
         14 . The valve lift adjustment arrangement as recited in  claim 13 , wherein the device further comprises an eccentrically-supported bearing shaft. 
     
     
         15 . The valve lift adjustment arrangement as recited in  claim 14 , further comprising a sleeve arranged on both sides of the bearing shaft so as to provide an eccentric arrangement thereof. 
     
     
         16 . The valve lift adjustment arrangement as recited in  claim 14 , further comprising a step arranged on both sides of the bearing shaft so as to be eccentric with respect thereto. 
     
     
         17 . The valve lift adjustment arrangement as recited in  claim 13 , wherein the tool engagement point further comprises a polygonal connection geometry. 
     
     
         18 . The valve lift adjustment arrangement as recited in  claim 13 , wherein the valve lift adjustment arrangement comprises reference marks configured to provide an orientation with respect to a pivot lever arrangement. 
     
     
         19 . A method for aligning an intermediate lever arrangement of a valve lift adjustment arrangement as recited in  claim 13 , the method comprising:
 providing a distance measuring device comprising a control unit comprising reference marks outside the valve lift adjustment arrangement;   moving the at least one intermediate lever relative to the distance measuring device so as to travel along the working curve so that the distance measuring device obtains a measured value;   comparing the measured value with the reference values in the control unit so as to determine if the measured value deviates from the reference values; and   adjusting the intermediate lever arrangement via the tool engagement point by turning the second roller if the measured value deviates from the reference values.   
     
     
         20 . The method as recited in  claim 19 , wherein, after the adjusting, the method further comprises fixing a position of the second roller using a fixation. 
     
     
         21 . The method as recited in  claim 20 , wherein the fixation is formed by at least one of a form-fitting means/device and a force-locking means/device. 
     
     
         22 . The method as recited in  claim 21 , wherein the at least one of a form-fitting means/device and a force-locking means/device is at least one of a bolt and a groove. 
     
     
         23 . The method as recited in  claim 20 , wherein the fixation is a bond. 
     
     
         24 . The method as recited in  claim 23 , wherein the bond is at least one of a welding point or a soldering point. 
     
     
         25 . The method as recited in  claim 19 , wherein the distance measuring device is:
 a capacitive distance sensor,   an inductive distance sensor,   a measuring sensor comprising a glass scale,   a measuring sensor comprising a resistance potentiometer,   a measuring sensor comprising an inductive detection,   a measuring sensor comprising an LVDT (position sensor) detection, or   a measuring device based on laser interferometry.   
     
     
         26 . A method for an assembly of a valve lift adjustment arrangement as recited in  claim 18  to a pivot lever arrangement, the method comprising:
 providing a valve lift adjusting arrangement as recited in  claim 18 ; 
 providing a pivot lever arrangement comprising reference marks; and 
 matching the reference marks of the intermediate lever arrangement with the reference marks of the pivot lever arrangement prior to a final assembly.