Zf Lenksysteme Gmbh | Date: 2013-10-22
A steering gear component for a vehicle, comprising: a worm, which is mounted so as to be rotatably and axially non-displace able, wherein the worm has a ball screw for receiving a row of balls, and a ball nut, which is drivingly connected to the worm by way of the row of balls, and wherein the ball nut acts as a piston of a cylinder for steering force assistance, wherein a signal transmitter for a sensing element is arranged on the steering spindle and the sensing element is arranged on the worm, or wherein the sensing element is arranged on the steering spindle and the signal transmitter for the sensing element is arranged on the worm.
Zf Lenksysteme Gmbh | Date: 2013-10-09
A steering system in a vehicle comprising an electric servomotor which includes a switching gearbox that is integrated into the steering shaft and has a switching actuator wherein a less direct gear ratio is presented when the switching actuator is de-energized than when it is energized.
Zf Lenksysteme Gmbh | Date: 2014-03-24
A method for implementing a transition from a functioning steering assistance system to a deactivated steering assistance system when a fault occurs, comprising the following steps: establishing the fault of the steering assistance system; establishing that all high-side power switches are functional (first case), or establishing that all low-side power switches are functional (second case); and in the first case: opening all high-side power switches and performing PWM-like control of the low-side power switches; or in the second case: opening all low-side power switches and performing PWM-like control of the high-side power switches.
Zf Lenksysteme Gmbh | Date: 2013-12-30
A method for operating an electric motor which is used as an electric servo drive in an electronic power steering system of a motor vehicle for power assistance and which has a number of magnetic elements and phase windings and is actuated and/or controlled by an electronic control unit of the electronic power steering system, wherein a temperature of at least one magnetic element of the electric motor is continuously determined during the operation of the electric motor by way of a temperature model and wherein, based on the temperature of the at least one magnetic element of the electric motor determined by way of the temperature model, an electrical current flowing in at least one of the phase windings of the electric motor is limited, taking into account a predeterminable limit temperature of the at least one magnetic element of the electric motor.
ZF Lenksysteme GmbH | Date: 2013-05-09
Provided is a method for operating a power steering system and to such a power steering system. A motor torque is computed by an electronic processor and is established by suitable motor actuation, wherein a plausibility check of the computed motor torque is carried out, taking a measured manual torque into consideration. A value of the additional torques of at least one special function is further considered in the plausibility check.
ZF Lenksysteme GmbH | Date: 2013-05-07
In a power steering system, in particular for a motor vehicle, comprising a servo-motor, which drives an axially displaceable component by way of a steering nut that is mounted rotatably, but axially non-displaceably in a gear housing, the steering nut is mounted in the gear housing in a radial bearing comprising an inner ring and an outer ring. A heat-insulating intermediate element is disposed between the outer ring of the radial bearing and the gear housing, or a cover of the gear housing, and/or between the inner ring of the radial bearing and the steering nut for the purpose of thermal decoupling.
Zf Lenksysteme Gmbh | Date: 2014-06-23
In an electric steering device, a plurality of periodic disturbances (M(f_(1o)), M(f_(2o)), . . . M(f_(no))) can occur which are to be compensated, while additionally occurring, in particular non-periodic, disturbances (M_(stoer)) are not to be compensated. So as to enable simultaneous compensation of a plurality of such periodic disturbances based on a model (G_(nom)(s)) of the steering device, it is proposed to map the further disturbances M_(Stoer )occurring in addition to the disturbances M(f_(1o)), M(f_(2o)), (Mf_(no)) to be compensated, together with inaccuracies or modeling errors (s) of the model (G_(nom)(s)) in the form of an unstructured disturbance (M_(stoer))
Zf Lenksysteme Gmbh | Date: 2015-01-12
A method for remotely controlling a motor vehicle, wherein the motor vehicle comprises a steering system and a drive train, which can both be electronically actuated by control means of the motor vehicle and by way of which the motor vehicle can be driven automatically. The control means of the motor vehicle have a wireless communication link to the touchscreen device so that automatic driving of the motor vehicle can be remotely controlled by way of the touchscreen device.
Zf Lenksysteme Gmbh | Date: 2014-05-28
A method for remotely controlling a big rig comprises a tractor unit and one or more trailers coupled to the tractor unit, wherein the tractor unit comprises a drive train which can be electronically actuated by control means of the tractor unit and by way of which the tractor unit can be driven automatically. The control means of the tractor unit have a wireless communication link to a touchscreen device so that automatic driving of the big rig can be remotely controlled by way of the touchscreen device during which at least one articulation angle between a longitudinal axis of the tractor unit and a longitudinal axis of the trailer is continuously regulated.
Zf Lenksysteme Gmbh | Date: 2013-04-05
A steering gear having a gearwheel, having a pinion which meshes with said gearwheel and having a pinion shaft which comprises the pinion and winch is mounted so as to be pivotable about a pivot axis perpendicular to the longitudinal axis of the pinion shaft wherein the radial spacing between the pivot axis and the location of toothed engagement between the gearwheel and pinion is smaller than the core radius of the pinion.