Daimler Chrysler Ag

Daimler Ag

Licentia Patent-verwaltungs Gmbh

Conti Temic Microelectronic Gmbh

Daimler-benz Ag

Temic Automotive Electric Motors Gmbh

Daimlerchrysler Ag Stuttgart

Reinhard Orthmann

Jens Meintschel

Matthias Gramann

Wolfgang Thiel

Hans-Peter Feustel

Michael Nagel

Werner Wiedemann

Matthias Gregor

Bernd-Heinrich Schmitfranz

Ferdinand Friedrich

Juergen Trost

Rudolf Wilczek

Dietmar Schröer

Hans-Joachim Fach

Hermann Pirner

Gerald Bolz

Holger Steffen

Thomas Kind

Dietrich Von Knorre

Hubert Schnüpke

Thomas Schencke

Thomas Susemihl

Michael Jürging

Michael J&uuml;rging

Lorenzo Giovanardi

Hans-Peter Schoener

Bernd Salomon

Markus Stalitza

Manfred Altmann

Peter Huebner

Viktor Dano

Hans-Peter Schoner

In an internal combustion engine including a housing with cylinders arranged in the housing, a crankshaft, and pistons moveably disposed in the cylinders and operatively connected to the crankshaft, and a device for changing the compression ratio of the cylinders of the internal combustion engine, the device comprises an adjusting arrangement with an eccentric which is mounted in the housing and, by means of rotation, controls the position and the direction of movement of the adjusting arrangement, and a drive for operating the adjusting arrangement including the eccentric.

Internal combustion engine with a variable compression ratio

In a method and device for adjusting an electro-dynamic brake of an electric camshaft adjuster for a phase angle adjustment of a camshaft of an internal combustion engine with respect to the crankshaft thereof, the phase angle is controlled by means of a position controller and the adjustment speed of the phase angle of the camshaft with respect to the crankshaft is controlled by means of an adjustment speed controller by controlling the current through the electro-dynamic brake by means of a further adjustment device and the use of Pilot controls to improve the control behavior of the cascade controller.

Method and device for controlling an electrodynamic brake of an electric camshaft adjuster for an internal combustion engine

An electric drive unit includes an electric motor for driving a fan. The motor has an electronic control module. An impeller wheel for producing a working air flow is mounted by bearings on an axle of the electric motor. The hub of the impeller wheel has at least one preferably two walls enclosing a cooling space or cooling space portions. At least one cooling surface of a cooling body is in contact with components of the electronic control module and projects into the cooling space. A gap formed between the hub of the impeller wheel and a carrier section communicates with an inner hub space. Holes () communicating with the hub inner space are provided in at least one component of the electric drive unit. When the impeller wheel rotes a convection cooling air flow is established between the gap and the holes.

Electric drive unit

A brushless, synchronous direct current motor is operated by supplying a direct current voltage as an input voltage for commutating the motor phase windings. The speed of the synchronous motor is modified or varied in two speed ranges. In the first speed range, a linear change of the input voltage is carried out up to a speed threshold value. In the second speed range with higher speeds than in the first speed range, a vector modification of the input voltage is carried out, for example for controlling the speed of a fan motor.

Method for operating a brushless direct current motor

A steering system for a motor vehicle, which allows steer-by-wire operation, a hand-torque actuator being connected in the steer-by-wire mode to a steering handle, e.g. a steering wheel, to simulate a steering resistance or a restoring torque. In order to be able to ensure adequate operating safety for the vehicle if the hand-torque actuator fails, even if the steering system is operated on a steer-by-wire basis, damping means are provided, which damp adjusting movements of the steering handle by the driver in the steer-by-wire mode if the hand-torque actuator fails.

Steering system for a motor vehicle

An electrohydraulic pressure supply unit involving the joint operation of two energy converters, which can be adjusted independent of each other, including an electric motor with speed control that drives a variable displacement pump with a variable displacement volume. The electric motor converts electrical output (loss-encumbered), into mechanical output, meaning into speed n and torque T. The pump then converts this mechanical output (also loss-encumbered) into hydraulic output. The hydraulic output is determined by the pressure difference &Dgr;p across the pump and the volume flow Q. The pressure difference &Dgr;p generally is impressed by the consumer or load on the system. The volume flow Q is the result of the displacement volume V and the motor speed n. The torque T, which must be generated by the motor, is derived from the displacement volume V and the pressure differential &Dgr;p. During the conversion from hydraulic output to mechanical output, the displacement volume V determines the distribution of the output to the speed n of the motor and the torque T. The current I flowing through the electric motor is primarily determined by the torque T while the voltage U is primarily influenced by the motor speed n. The volume flow supplied by the electrohydraulic pressure supply unit is essentially adjusted by controlling the speed adjustment of the electric motor. The speed of the electric drive motor in this case can essentially be adjusted independent of the displacement volume of the variable displacement pump.

Electrohydraulic pressure supply unit with variable-displacement pump and controllable electric device

A method of operating an actuator for electromagnetically controlling a valve in an internal combustion engine involves supplying a heating current to the operating coils of the actuator before starting the internal combustion engine from a cold start condition. Thereby, the operating coils, the components surrounding them, and the lubricant are heated to ensure proper viscosity of the lubricant and thus proper operation of the actuator.

Method for operating actuators for electromagnetically controlling a valve

Method for controlling the switching-off process in the phase windings

An electrical windshield wiper drive for a vehicle, includes a windshield wiper arm and an electric motor drive in the form of an ultrasonic motor having a drive shaft connected to the windshield wiper arm for rotatably driving the wiper arm.

Electrical windshield wiper drive

Multiple-surface sensor control for a traveling wave motor

Growing community of inventors

Leonberg, Germany

Reinhard Orthmann