Patents by Inventor Wilfried Leutner
Wilfried Leutner has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10471983Abstract: The disclosure relates to a method and to devices for operating a power steering system. wherein a motor torque applied by an electric motor is superposed on a specified manual torque, wherein a beginning freezing of the power steering system is detected by means of suitable measures, and wherein the electric motor is controlled with an oscillating control signal to avoid the freezing of the power steering system, whereby an oscillating application of a shaking torque to the power steering system, applied by the electric motor, is effected. A control signal that has first time spans in which the control signal has an increased amplitude and second time spans in which the control signal has no amplitude or a reduced amplitude is generated, whereby the shaking torque is produced with an increased maximum torque in the first time spans, without thermal overloading of the electric motor.Type: GrantFiled: June 17, 2016Date of Patent: November 12, 2019Assignees: Robert Bosch Automotive Steering GmbH, Robert Bosch GmbHInventors: Wilfried Leutner, Viktor Fast, Rainer Woeger
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Publication number: 20180201301Abstract: The disclosure relates to a method and to devices for operating a power steering system. wherein a motor torque applied by an electric motor is superposed on a specified manual torque, wherein a beginning freezing of the power steering system is detected by means of suitable measures, and wherein the electric motor is controlled with an oscillating control signal to avoid the freezing of the power steering system, whereby an oscillating application of a shaking torque to the power steering system, applied by the electric motor, is effected. A control signal that has first time spans in which the control signal has an increased amplitude and second time spans in which the control signal has no amplitude or a reduced amplitude is generated, whereby the shaking torque is produced with an increased maximum torque in the first time spans, without thermal overloading of the electric motor.Type: ApplicationFiled: June 17, 2016Publication date: July 19, 2018Inventors: Wilfried Leutner, Viktor Fast, Rainer Woeger
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Patent number: 8360910Abstract: A power-steering drive for a steering system in a motor vehicle includes a motor driving a motor shaft and a transmission situated between the motor shaft and an output shaft. The transmission takes the form of a combined worm-belt transmission. Furthermore, in a method for adjusting the transmission of a power-steering drive, the adjustment is performed by solely adjusting the intermediate shaft relative to the motor shaft and/or the output shaft.Type: GrantFiled: March 14, 2007Date of Patent: January 29, 2013Assignee: ZF Lenksysteme GmbHInventor: Wilfried Leutner
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Patent number: 7683563Abstract: A protective device for a power-assisted steering system, such a power-assisted steering system, and a method for protecting a power-assisted steering system are described. Provided in the described power-assisted steering system is a circuit that closes a separation in the neutral point of an electric motor when the rotational speed of the electric motor exceeds a prespecified value.Type: GrantFiled: February 14, 2008Date of Patent: March 23, 2010Assignee: ZF Lenksysteme GmbHInventor: Wilfried Leutner
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Publication number: 20090250286Abstract: A power-steering drive for a steering system in a motor vehicle includes a motor driving a motor shaft and a transmission situated between the motor shaft and an output shaft. The transmission takes the form of a combined worm-belt transmission. Furthermore, in a method for adjusting the transmission of a power-steering drive, the adjustment is performed by solely adjusting the intermediate shaft relative to the motor shaft and/or the output shaft.Type: ApplicationFiled: March 14, 2007Publication date: October 8, 2009Inventor: Wilfried Leutner
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Publication number: 20090146522Abstract: An electric servomotor for a power-assisted steering system in a vehicle has a stator laminated core having an outer diameter and an active length. In order to provide an electric servomotor for a power-assisted steering system that has an optimum diameter/length ratio and that covers a steering performance range from compact cars to full-size vehicles using a reasonable change in volume, it is provided that, with a constant outer diameter, the ratio of the outer diameter to the active length of the stator laminated core can be varied such that the electric servomotor can be used for power-assisted steering systems for compact cars up to full-size cars and the outer diameter is constant.Type: ApplicationFiled: November 19, 2008Publication date: June 11, 2009Inventors: Helmut Knoedler, Wilfried Leutner, Joerg Mayer, Michael Ochs, Thomas Kuehnhoefer, Wolfgang Runge
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Publication number: 20080265818Abstract: A protective device for a power-assisted steering system, such a power-assisted steering system, and a method for protecting a power-assisted steering system are described. Provided in the described power-assisted steering system is a circuit that closes a separation in the neutral point of an electric motor when the rotational speed of the electric motor exceeds a prespecified value.Type: ApplicationFiled: February 14, 2008Publication date: October 30, 2008Inventor: Wilfried Leutner
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Patent number: 7232006Abstract: A steer-by-wire steering system has a steering wheel actuator and a braking device that acts on the steering column. The braking device is activated when the vehicle steering wheel is to be blocked or at least sharply braked, such as when the steering stop is reached or a wheel goes over the edge of a curb. The braking device functions like a switchable freewheel.Type: GrantFiled: May 17, 2006Date of Patent: June 19, 2007Assignees: Robert Bosch GmbH, ZF Lenksysteme GmbHInventors: Peter Dominke, Chi-Thuan Cao, Wolfgang Pfeiffer, Klaus-Dieter Leimbach, Werner Harter, Jens Hafermalz, Helmut Knoedler, Wilfried Leutner, Juergen Schuele, Herbert Lohner
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Patent number: 7140465Abstract: A steer-by-wire steering system is proposed, having a steering wheel actuator and a braking device that acts on the steering column (3). The braking device is activated when the vehicle steering wheel is to be blocked or at least sharply braked, such as when the steering stop is reached or a wheel goes over the edge of a curb. The braking device functions like a switchable freewheel.Type: GrantFiled: November 16, 2001Date of Patent: November 28, 2006Assignee: Robert Bosch GmbHInventors: Peter Dominke, Chi-Thuan Cao, Wolfgang Pfeiffer, Klaus-Dieter Leimbach, Werner Harter, Jens Hafermalz, Helmut Knoedler, Wilfried Leutner, Juergen Schuele, Herbert Lohner
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Publication number: 20060201733Abstract: A steer-by-wire steering system has a steering wheel actuator and a braking device that acts on the steering column. The braking device is activated when the vehicle steering wheel is to be blocked or at least sharply braked, such as when the steering stop is reached or a wheel goes over the edge of a curb. The braking device functions like a switchable freewheel.Type: ApplicationFiled: May 17, 2006Publication date: September 14, 2006Inventors: Peter Dominke, Chi-Thuan Cao, Wolfgang Pfeiffer, Klaus-Dieter Leimbach, Werner Harter, Jens Hafermalz, Helmut Knoedler, Wilfried Leutner, Juergen Schuele, Herbert Lohner
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Publication number: 20050258384Abstract: A valve providing a controlled pressure for a hydraulic device includes a first control element and with a second control element, the first and second control elements being movable relative to one another under the influence of a nominal value input at a steering device and being brought into a neutral position with respect to one another by means of a restoring element, and a driving device with which the control elements can be moved relative to one another independently of the nominal value input at the steering device, in order to shift the hydraulic center of the valve. In order to create a valve with small overall dimensions and simple and reliable functions, provisions are made pursuant so that the driving device is constructed as an electrodynamic driving mechanism formed coaxially with the valve, and/or with an electrostatic stepper motor.Type: ApplicationFiled: February 23, 2005Publication date: November 24, 2005Inventor: Wilfried Leutner
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Patent number: 6948584Abstract: A steering system, e.g., a hydraulic rack and pinion steering system for motor vehicles, includes a steering handle for prescribing a steering intention, a pressure medium source and a control valve device for controlling a flow of pressure medium to and from a servomotor in order to deflect vehicle wheels. The control valve device has a closed center, and a pressure medium accumulator is provided for producing and/or assisting a flow of pressure medium to and from the servomotor.Type: GrantFiled: June 26, 2002Date of Patent: September 27, 2005Assignee: ZF Lenksysteme GmbHInventors: Martin Budaker, Wilfried Leutner, Helmut Knoedler
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Publication number: 20040149509Abstract: A steering system, in particular a hydraulic rack and pinion steering system for motor vehicles, has the following features:Type: ApplicationFiled: November 19, 2003Publication date: August 5, 2004Inventors: Martin Budaker, Wilfried Leutner, Helmut Knoedler
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Publication number: 20030127274Abstract: A steer-by-wire steering system is proposed, having a steering wheel actuator and a braking device that acts on the steering column (3). The braking device is activated when the vehicle steering wheel is to be blocked or at least sharply braked, such as when the steering stop is reached or a wheel goes over the edge of a curb. The braking device functions like a switchable freewheel.Type: ApplicationFiled: October 28, 2002Publication date: July 10, 2003Inventors: Peter Dominke, Chi-Thuan Cao, Wolfgang Pfeiffer, Klaus-Dieter Leimbach, Werner Harter, Jens Hafermalz, Helmut Knoedler, Wilfried Leutner, Juergen Schuele, Herbert Lohner
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Patent number: 5860351Abstract: A hydraulic steering arrangement with a steering device (2) and an oil tank (3) which are connected with each other via a supply line (5) and a return line (6), wherein a hydraulic pump (1) is integrated into the supply line (5), has an oil reservoir (7) communicating with the return line (6) and a backpressure valve (8) opening in the direction toward the oil tank (3), which is disposed between the oil tank (3) and the oil reservoir (7).Type: GrantFiled: March 26, 1997Date of Patent: January 19, 1999Assignee: ZF Friedrichshafen AGInventors: Armin Lang, Wilfried Leutner, Helmut Knodler
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Patent number: 5184691Abstract: An auxiliary power steering system, especially for motor vehicles is provided with a pump (6), a servomotor (5) supplied with flow under pressure from a distribution valve (4) and with a quantity regulating valve (2), by means of which a regulated pressure is applied to a pressure control valve (3) for controlling pressure flow to cylinder chambers of a servomotor (5). The flow under regulated pressure is supplied to the servomotor cylinder chambers (17, 18) via the distribution valve (4) and initial pressure regulation is effected by the pressure control valve (3) wherein initial flow pressure is at less than the full pump operating pressure.Type: GrantFiled: January 29, 1991Date of Patent: February 9, 1993Assignee: Zahnradfabrik Friedrichshafen, AG.Inventor: Wilfried Leutner