Bayerische Motoren Werke Aktiengesellschaft

B Ayerische M Otoren W Erke a Ktiengesellschaft

Thomas Steinle

Johannes Hoehl

Georg Emmersberger

Roland Kraft

Rudolf Schmid

Dietmar Knoll

Peter Wolff

Manfred Maier

Bertram Zapp

A valve drive for a cylinder head of an internal combustion engine has a first camshaft which is rotatably mounted in a first and a second camshaft bearing and which includes at least one cam with a first cam curve and a second cam curve that differs from the first cam curve. A gas exchange valve is actuated by the first or the second cam curve. A camshaft section is provided, by which the cam can be moved by an actuator such that the gas exchange valve can be actuated either via the first or the second cam curve. The first camshaft and the cam have a fixed position relative to each other. The first camshaft can be axially moved in the first and the second camshaft bearing, and an axial lock is provided for the camshaft.

Valve drive for an internal combustion engine

A motorcycle drive device includes a shiftable transmission set up to transmit drive power which can be provided by an engine crankshaft toward a drivable wheel. The transmission includes an input shaft having a rotation axis when is displaceable to adjust a spacing between the rotation axes of a primary gearwheel on the transmission input shaft and a primary pinion transferring the drive power from the crankshaft. A transmission input shaft bearing supporting the transmission input shaft is arranged in a bearing plate that is rotatable relative to a housing of the transmission. The bearing plate includes an adjusting mechanism arranged to change the position of the bearing plate with respect to the transmission housing to adjust the axial spacing of the rotation axes.

Motorcycle drive device with adjustable backlash

A valve drive for a cylinder head of an internal combustion engine has a camshaft which is rotatably mounted in a first and a second camshaft bearing and which includes at least one cam with a first cam curve and a second cam curve that differs from the first cam curve. A gas exchange valve can be actuated by the first or the second cam curve via a cam follower. A camshaft section is provided, by which the cam can be moved by an actuator such that the gas exchange valve can be actuated either via the first or the second cam curve via the cam follower. The camshaft and the cam have a fixed position relative to each other. The camshaft can be axially moved in the first and the second camshaft bearing. The camshaft bearings consist of a camshaft bearing block and a common bearing frame. A lubricant supply bore is provided which opens into a fourth lubricant groove in the bearing frame in order to supply the bearing points with lubricant. A first lubricant groove is provided in the first camshaft bearing block, and a second lubricant groove is provided in the second camshaft bearing block. These lubricant grooves correspond to the fourth lubricant groove and are open in the direction of the cam follower.

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Munich, Germany

Thomas Steinle