Zf Friedrichshafen Ag

Frank Richter

Reiner Keller

Jochen Walliser

Ewald Schmitz

Ilja Imgrunt

Konrad Thoma

Markus Wannags

A connecting device of a vehicle drive-train, located outside a variable-speed transmission, for rotationally coupling a shaft to a drive-train element. A sliding sleeve is rotationally fixed on the shaft but slides axially between first and second positions. In the first position, the shaft is rotationally disengaged from the drive-train element and, in the second position, they are rotationally coupled. An actuator displaces the sliding sleeve between the first and second positions, with a shift groove along a peripheral contour of the sliding sleeve and engagement members for engaging in the groove. The sliding sleeve can rotate and move axially relative to the engagement members and the groove is shaped as a curved guiding such that, when the engagement members engage in the groove and the sliding sleeve rotates relative to the engagement member, the sliding sleeve moves axially between the first and second positions by virtue of the groove.

Connecting device for outside a variable-speed transmission

A valve train of a combustion piston engine having an actuating device which comprises a phase shift gearbox with two inputs and an output for phase adjustment of a camshaft. The first input is connected with a crankshaft, the second input is connected with a controllable braking device and the output is rotationally fixed with the camshaft. The brake is an electromagnetically controlled friction brake which comprises an electromagnet and magnetic coil. A brake rotor is connected with the second input and can be biased, by the magnetic field of the electromagnet, against a friction surface. A permanent magnet is positioned axially adjacent the brake rotor such that, by its magnetic field, the brake rotor can be pressed against a fixed friction surface for the adjustment of a basic brake torque with the respective basic pressing force.

Valve train of a combustion piston engine

A shifting device for a gearbox which has at least one sliding sleeve that is placed on a transmission shaft in a rotationally fixed and axially movable manner. One idler gear, which is rotationally supported on the transmission shaft, is located at on one side adjacent the sleeve. The sliding sleeve can be axially moved, by an actuating element, from a neutral position into a shifting position toward the idler gear, and upon reaching the shifting position, couples the idler gear with the transmission shaft. The associated actuating elements are arranged in a stationary manner and, upon actuation, engage with at least one shifting groove, provided on an outside diameter of the at least one sliding sleeve and has a curve-shaped path, in the axial direction, so that rotation of the transmission shaft axially shifts the sliding sleeve according to the further path of the shifting groove.

Shifting device for a gearbox

An adjusting system for camshafts of an internal combustion engine having an emergency running function, comprising a phase shifter gearing with an input drive element driven by a crankshaft of an internal combustion engine, an output drive element which drives a camshaft of the internal combustion engine, and an actuating element, by means of which a relative rotation between the drive input element and the drive output element can be realized by means of a device for imparting a braking torque, which is variable for normal operation, to the actuating element. In the event of failure of the device and/or control thereof, an emergency running setting of the camshaft can be attained and maintained as a result of braking or respectively, arresting the actuating element.

Adjusting system for camshafts of an internal combustion engine

A clutch or brake with an electrically actuated switching coil and an armature that axially moves toward the switching coil and forms a connection with the switching coil and can rotate relative to the switching coil, in an adjustment system for camshafts of a combustion engine. A superposition transmission has an input driven by a crankshaft of the engine, a drive output element that drives a camshaft of the engine and a control element, by which relative rotation between the input and the output can be produced by applying a braking torque. The armature is rotationally fixed and axially slidable, and centered on or at a transmission component, and the switching coil is rotationally fixed and centered coaxially with the armature by a membrane spring on a further transmission component, relative to which the armature is braked or to which the armature is coupled.

Clutch or brake in or at a gearbox

An arrangement for mounting and fixing a planetary gear system () onto a camshaft (). The planetary gear system comprises a planetary carrier () that forms the drive input of the camshaft (), with planetary gears () mounted on planetary bolts (). A ring gear () is rotationally fixedly connected to the camshaft (), and a sun gear () is connected with a sun shaft (). The ring gear () is arranged at the end of and coaxially with the camshaft () and is rotationally fixedly connected to the camshaft () by eccentrically arranged fixing elements ().

Arrangement for mounting and attaching a planetary gear to a camshaft and method for mounting the planetary gear

An adjustment device for a camshaft includes a brake system and a superposition gear system connected on a drive output side to the camshaft and on the drive input side to the crankshaft, such that to adjust the camshaft the superposition gear system dissipates part of the energy from the drive side into the brake system. The brake system is a frictional brake system, such that the necessary braking force is produced by a friction lining that operates in a slipping condition.

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Oberteuringen, Germany

Frank Richter