Magna Powertrain & Ag & Co. Kg

Steyr-daimler-puch Ag

Magna Steyr Fährzeugtechnik Ag & Co. Kg

Magna Powertrain Gmbh & Co. Kg

Martin Parigger

Simon Kaimer

Johannes Quehenberger

Franz Gratzer

Thomas Linortner

Hermann Pecnik

Martin Kiessner-Haiden

Gernot Maier

Robert Schaffernak

Gerhard Mullner

Raphael Biancale

Heribert Dietrich

Thomas Christöfl

Ender Ergun

Andreas Teuschel

Manfred Gollner

Johann Rieger

Thomas Christoefl

Thomas CHRISTÖFL

The present invention relates to a method with which the driving dynamics of an electrically driven vehicle can be modified. Within the scope of the method according to the invention, a vehicle operating characteristic variable, as a function of which a torque transmission mechanism is engaged, is monitored, by means of which torque transmission mechanism two half-shaft assemblies of the vehicle which are each driven by an electric motor can be selectively connected to one another in terms of drive.

Method for improving the driving dynamics of a vehicle and drive device suitable for performing the method

The invention relates to a powertrain for a motor vehicle having a permanently driven primary axle, comprising: a drive unit for the generation of a drive torque; a first clutch for the transfer of a variable portion of the drive torque to a secondary axle of the motor vehicle; a second clutch for the deactuation of a torque transfer section of the powertrain arranged between the first clutch and the second clutch when the first clutch is opened; and a control unit for the automatic control of the first clutch, with the control unit being connected to at least one sensor for the detection of a wheel slip at the primary axle; with the control unit being made, starting from a deactuated state of the torque transfer section, to close the second clutch in dependence on a detected wheel slip at the primary axle.

Powertrain for a motor vehicle

The invention relates to a method for lubricating a transmission of a motor vehicle, particularly a power divider, wherein the oil is conveyed by an oil pump from an oil sump to components of the transmission. The amount of oil conveyed is set as a function of the predetermined parameters. The conveyed amount of oil is controlled in that the oil pump is operated intermittently, e.g. is switched on and off repeatedly. The invention further describes a device for carrying out the method.

Method and apparatus for lubricating a transmission of a motor vehicle

A clutch unit () comprises a wet friction clutch for controllable transmission of a torque from an input element () to an output element (), housing that contains the friction clutch and oil for cooling the friction clutch, and an actuator () for actuating the friction clutch. The actuator is attached to the housing in a thermally conductive way and has a temperature sensor () for sensing a temperature of the actuator. In order to computationally determine the oil temperature (T) in the clutch unit (), a thermal input power to the clutch unit is determined as a function of at least a speed of the input element and/or of the output element. The difference between the thermal input power and the thermal output power is determined, and the oil temperature is determined as a function of the difference that was determined.

Method for computational determination of the oil temperature in a clutch unit

A method for the readjustment of an actuator of an all-wheel drive clutch of a motor vehicle that includes determining a clutch slip value corresponding to a difference between the speed of a primary axle and the speed of a secondary axle; determining a reference secondary axle torque corresponding to the proportion of a driving torque which is transmitted to the secondary axle and for which a clutch slip value of substantially zero is expected; and comparing the clutch slip value with a threshold value and comparing a desired clutch torque with the reference secondary axle torque. A desired clutch torque/control signal relationship for the clutch actuator is changed in dependence on the result of these comparisons.

Method for calibrating an actuator of an all-wheel drive clutch

A method is described for classifying a clutch unit for a drivetrain of a motor vehicle, wherein the clutch unit has at least one friction clutch for the controllable transmission of a torque from an input element to an output element and has an actuator for actuating the friction clutch. Here, the clutch unit is controlled on the basis of a predefined characteristic curve which describes a predefined dependency of the clutch torque to be transmitted on an actuator control variable.

Method for classifying a clutch unit

A clutch arrangement having an input element and an output element that are rotatable relevant to one another, a friction clutch and a pump. The friction clutch couples the input element with the output element in dependence on a hydraulic pressure in a pressure space of the clutch arrangement. The pump has a first pump part that is rotationally fixedly connected to the input element and a second pump part that is rotationally fixedly connected to the output element. The pump may be driven by a rotary movement of the input element and the output element relative to one another, with a pressure side of the pump being connected to the pressure space. An orifice having a substantially temperature independent leakage characteristic is arranged in a leakage line that leads from the pressure space to a low pressure space and which extends parallel to the pump.

Clutch arrangement

A method controlling a clutch arrangement that serves, in a powertrain of a motor vehicle, for the transmission of a torque from an input element to an output element. Starting from an activated state of the clutch arrangement, a respective estimated torque value is calculated in repeating calculation cycles. A torque build-up value is calculated in dependence on at least one speed difference value. A torque reduction value is calculated in dependence on at least the last calculated estimated torque value. The estimated torque value is re-calculated on the basis of the last calculated estimated torque value by up integration of the calculated torque build-up value and down integration of the calculated torque reduction value. The recalculated estimated torque value is compared with a torque threshold value. The clutch arrangement is deactivated when the recalculated estimated torque value is below the torque threshold value.

Control method for clutch arrangement

A power transfer assembly for use in a four-wheel drive vehicle has a torque transfer mechanism equipped with a power-operated clutch actuator for controlling adaptive engagement of a friction clutch and a control system for controlling actuation of the clutch actuator. The control system and its method of operation are adapted to control actuation of the clutch actuator based on whether the vehicle is operating in an engine drive mode or an engine coast/braking mode.

Clutch control system for power transfer unit in four-wheel drive vehicle

Method for controlling a vehicle drive unit having a continuously variable transmission

A viscous shear coupling for distributing torque between front and rear axles of an all-wheel drive vehicle is provided which comprises a housing, a set of inner blades interdigitating with a set of outer blades, the inner and outer blades being axially spaced apart from each other and axially slidably mounted within the housing, a viscous liquid located within the housing, an adjusting piston within the housing which is axially displaceable so as to adjust the axial distance between adjacent inner and outer blades. The viscous shear coupling further includes a control pressure circuit for delivery of a control pressure fluid to the adjusting piston, a control valve for regulating the delivery of the control pressure fluid to the adjusting piston, and a control device (e.g., a microprocessor) which calculates a desired adjusting piston speed based on driving conditions and adjusts a valve current delivered to the control valve in order to obtain the desired adjusting piston speed. A process for controlling the viscous shear coupling includes acquiring a set of signals indicative of driving conditions and converting them to a set of input parameters, converting the input parameters to a set of basic parameters, ascertaining a set of control deviations from the basic parameters and the input parameters, calculating the desired adjusting piston speed from the control deviations, and adjusting the valve current delivered to the control valve in order to obtain the desired adjusting piston speed.

Adjustable viscous shear coupling for an all-wheel drive vehicle and a

A limited-slip differential gear comprising a differential gear case which is adapted to be driven and in which two coaxial side gears and at least one pair of differential pinions cooperating with each other and associated with the side gears are rotatably mounted, wherein each differential pinion and the associated side gear constitute a worm gear train. In order to reduce the manufacturing costs and the overall size, the worm gear trains comprise worm gears consisting of the side gears and worms consisting of the differential pinions and the differential pinions of each pair have axes extending at an angle to each other and directly mesh with each other.

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Eggersdorf, Austria

Martin Parigger