Patents by Inventor Roland Greul
Roland Greul 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).
-
Patent number: 11407446Abstract: The disclosure relates to a method for operating a steering system for a motor vehicle, which steering system has, on the one hand, a steering handle which can be operated by a driver of the motor vehicle, and a hand torque adjuster which is assigned to the steering handle and is designed to apply a damper force, counteracting the operation by the driver, to the steering handle, and, on the other hand, a wheel angle adjuster which is coupled to at least one steerable wheel of the motor vehicle and which is electrically actuated as a function of operation of the steering handle in order to set a steering angle of the at least one wheel. There is provision that the damper force is generated by the manual torque adjuster as a function of a current performance of the wheel angle adjuster.Type: GrantFiled: December 12, 2018Date of Patent: August 9, 2022Assignee: Robert Bosch GmbHInventors: Joerg Strecker, Roland Greul, Alexander Sauter
-
Publication number: 20200361531Abstract: The disclosure relates to a method for operating a steering system for a motor vehicle, which steering system has, on the one hand, a steering handle which can be operated by a driver of the motor vehicle, and a hand torque adjuster which is assigned to the steering handle and is designed to apply a damper force, counteracting the operation by the driver, to the steering handle, and, on the other hand, a wheel angle adjuster which is coupled to at least one steerable wheel of the motor vehicle and which is electrically actuated as a function of operation of the steering handle in order to set a steering angle of the at least one wheel. There is provision that the damper force is generated by the manual torque adjuster as a function of a current performance of the wheel angle adjuster.Type: ApplicationFiled: December 12, 2018Publication date: November 19, 2020Inventors: Joerg Strecker, Roland Greul, Alexander Sauter
-
Patent number: 10523123Abstract: A multi-phase synchronous converter consisting of a plurality of half bridges which in turn consist of an upper power switch and a lower power switch, the converter being actuated by a pulse width modulation dependent on a predetermined pulse duty cycle in the range of zero to one hundred percent. The multi-phase synchronous converter generates an output current and is operated in a normal mode in which the power switches switch with a normal switching period defined by a predetermined normal switching frequency, and a normal pulse duration dependent on the actual pulse duty cycle. As soon as the pulse duty cycle exceeds an upper duty cycle threshold or falls below a lower duty cycle threshold, the multi-phase synchronous converter is switched from the normal mode into an operating mode in which at least one of the power switches of at least one half bridge is deactivated.Type: GrantFiled: September 30, 2016Date of Patent: December 31, 2019Assignee: AVL LIST GmbHInventors: Tomas Perpetuo Correa, Roland Greul, Oliver König
-
Publication number: 20180278179Abstract: A multi-phase synchronous converter consisting of a plurality of half bridges which in turn consist of an upper power switch and a lower power switch, the converter being actuated by a pulse width modulation dependent on a predetermined pulse duty cycle in the range of zero to one hundred percent. The multi-phase synchronous converter generates an output current and is operated in a normal mode in which the power switches switch with a normal switching period defined by a predetermined normal switching frequency, and a normal pulse duration dependent on the actual pulse duty cycle. As soon as the pulse duty cycle exceeds an upper duty cycle threshold or falls below a lower duty cycle threshold, the multi-phase synchronous converter is switched from the normal mode into an operating mode in which at least one of the power switches of at least one half bridge is deactivated.Type: ApplicationFiled: September 30, 2016Publication date: September 27, 2018Applicant: AVL LIST GmbHInventors: Tomas Perpetuo Correa, Roland Greul, Oliver König
-
Patent number: 9988085Abstract: The invention relates to a method for assisting a driver in maneuvering a motor-vehicle combination (1) comprising, as vehicles, at least one tractor motor vehicle (2) and at least two trailers (3a, 3b) coupled thereto, wherein a target articulation angle (?2) at least between two of the vehicles (3a, 3b) is externally specified and is adjusted by means of at least one steering actuator (5a, 5b) of at least one of the vehicles (2).Type: GrantFiled: April 8, 2015Date of Patent: June 5, 2018Assignee: Robert Bosch Automotive Steering GmbHInventors: Roland Greul, Nicolas Boos
-
Publication number: 20170320520Abstract: The invention relates to a method for assisting a driver in maneuvering a motor-vehicle combination (1) comprising, as vehicles, at least one tractor motor vehicle (2) and at least two trailers (3a, 3b) coupled thereto, wherein a target articulation angle (?2) at least between two of the vehicles (3a, 3b) is externally specified and is adjusted by means of at least one steering actuator (5a, 5b) of at least one of the vehicles (2).Type: ApplicationFiled: April 8, 2015Publication date: November 9, 2017Applicant: Robert Bosch Automotive Steering GmbHInventors: Roland Greul, Nicolas Boos
-
Patent number: 9274522Abstract: 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 the control of the tractor unit and by way of which the tractor unit can be driven automatically. The control 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.Type: GrantFiled: May 28, 2014Date of Patent: March 1, 2016Assignee: Robert Bosch Automotive Steering GmbHInventors: Nicolas Boos, Roland Greul, Alexander Gaedke
-
Patent number: 9272732Abstract: A method for determining a rack force for a steering apparatus of a vehicle, in which the rack force is determined as a function of a steering angle variable which characterizes an actual wheel steering angle or a set point of the wheel steering angle. In order to specify a method for determining a rack force, with which a target steering torque can be generated such that a comfortable steering feel is imparted to the driver and the steering apparatus nevertheless gives the driver feedback that is as realistic as possible regarding the motion state of the vehicle, the method comprises: determining a variable which characterizes a lateral force on a shaft of the steering apparatus, and determining the rack force as a function of the lateral force, wherein the determination of the rack force comprises a filtering by means of a signal processing element having a proportional-differential transfer function.Type: GrantFiled: September 10, 2012Date of Patent: March 1, 2016Assignee: Robert Bosch Automotive Steering GmbHInventors: Roland Greul, Thomas Werner, Joerg Strecker
-
Publication number: 20150198949Abstract: 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.Type: ApplicationFiled: May 28, 2014Publication date: July 16, 2015Applicant: ZF LENKSYSTEME GMBHInventors: Nicolas BOOS, Roland Greul, Alexander Gaedke
-
Publication number: 20140230533Abstract: A method for determining a rack force for a steering apparatus of a vehicle, in which the rack force is determined as a function of a steering angle variable which characterizes an actual wheel steering angle or a set point of the wheel steering angle. In order to specify a method for determining a rack force, with which a target steering torque can be generated such that a comfortable steering feel is imparted to the driver and the steering apparatus nevertheless gives the driver feedback that is as realistic as possible regarding the motion state of the vehicle, the method comprises: determining a variable which characterizes a lateral force on a shaft of the steering apparatus, and determining the rack force as a function of the lateral force, wherein the determination of the rack force comprises a filtering by means of a signal processing element having a proportional-differential transfer function.Type: ApplicationFiled: September 10, 2012Publication date: August 21, 2014Applicant: ZF LENKSYSTEME GmbHInventors: Roland Greul, Thomas Werner, Joerg STRECKER
-
Patent number: 8249777Abstract: In order to achieve a steering feel for SbW systems and EPS systems having a control design for controlling the steering torque by generating a target steering torque (torTB) that can be adapted to various steering systems, vehicle types, or requirements, in which the resulting steering feel is a steering feel, in all driving conditions and driving situations, which is equivalent to, or better than, hydraulic and electromechanical steering systems available on the market today, according to the invention: a base steering torque (torB) is determined as a function of an externally acting force (torR) and a vehicle speed (velV); a damping torque (torD) is determined as a function of a steering speed (anvSW) and the vehicle speed (velV); a hysteresis torque (torF) is determined as a function of the steering speed (anvSW) and the vehicle speed (velV); a centering torque (torCF; torC) in the direction of the straight-ahead position is determined as a function of a steering wheel angle (angSW) and the vehicle speedType: GrantFiled: August 3, 2011Date of Patent: August 21, 2012Assignee: ZF Lenksysteme GmbHInventors: Roland Greul, Thomas Werner
-
Publication number: 20120072074Abstract: In order to achieve a steering feel for SbW systems and EPS systems having a control design for controlling the steering torque by generating a target steering torque (torTB) that can be adapted to various steering systems, vehicle types, or requirements, in which the resulting steering feel is a steering feel, in all driving conditions and driving situations, which is equivalent to, or better than, hydraulic and electromechanical steering systems available on the market today, according to the invention: a base steering torque (torB) is determined as a function of an externally acting force (torR) and a vehicle speed (velV); a damping torque (torD) is determined as a function of a steering speed (anvSW) and the vehicle speed (velV); a hysteresis torque (torF) is determined as a function of the steering speed (anvSW) and the vehicle speed (velV); a centering torque (torCF; torC) in the direction of the straight-ahead position is determined as a function of a steering wheel angle (angSW) and the vehicle speedType: ApplicationFiled: August 3, 2011Publication date: March 22, 2012Applicant: ZF Lenksysteme GmbHInventors: Roland Greul, Thomas Werner
-
Publication number: 20090138158Abstract: In a method for controlling a motor vehicle via driving dynamics, using an auxiliary steering system, including a power steering assistance unit, a superposed transmission, and a final control element to correct a driver-steering angle by applying an auxiliary steering angle, an overall steering angle is formed to modify the wheel-steering angle of steered wheels with the aid of the superposed transmission, and a control and regulation unit assigned to the final control element determines a setpoint for the auxiliary steering angle. When an understeering state is detected, the setpoint of the auxiliary steering angle is modified such that the lateral wheel force is kept within a range of a maximally achievable maximum value for the lateral wheel force, which is dependent upon environmental influences, for the duration of the understeering state.Type: ApplicationFiled: November 25, 2008Publication date: May 28, 2009Inventors: Roland GREUL, Joerg Strecker, Christopher Kreis