Patent ID: 9133737
Filing Date: 2015-09-15
Classification: F01L

Abstract:
1. A mechanically controllable valve drive comprising: a gas exchange valve on which a transmission arrangement is configured to directly or indirectly act via a working contour, the transmission arrangement comprising a first wheel element comprising a toothing which is operatively connected to a camshaft, a second wheel element comprising a toothing which is configured to act directly or indirectly on the gas exchange valve, the transmission arrangement being mounted so as to be movable in a cylinder head via a bearing, and to be operatively connected the camshaft and to a valve stroke adjusting device comprising an adjusting shaft which is configurable to be rotatable and to set different maximum strokes; at least one planetary gear; and an axis connected to the adjusting shaft which is configured to commonly rotate therewith, wherein, the first wheel element and the second wheel element are each mounted on the adjusting shaft so as to rotate and to be in a geared connection with each another via their respective toothing so that a rotation of the adjusting shaft effects a phase shift between the first wheel element and the second wheel element, and so that a rotary fixing generates an oscillating movement of the first wheel element and the second wheel element, the first wheel element and the second wheel element are provided as mutually confronting crown gears, the geared connection is realized via the at least one planetary gear, and each of the at least one planetary gear is supported on the axis connected to the adjusting shaft.