Patents by Inventor Werner Wolfgang
Werner Wolfgang 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: 11254299Abstract: A method for operating a drive train of a motor vehicle may include, for a starting process of an internal combustion engine, transferring the separating clutch from a disengaged condition into an engaged condition or a slip state such that the electric machine accelerates the internal combustion engine to a starting speed. The method may further include actuating a torque-transmitting element between the electric machine and the output shaft to enter a slip state. The method may also include increasing the torque of the electric machine to reliably reach and hold the slip state of the torque-transmitting element. Additionally, the method may include operating the electric machine as a generator or as a motor depending on an expected load direction of the drive train during the starting process to reliably reach and hold the torque-transmitting element in the slip state.Type: GrantFiled: February 11, 2020Date of Patent: February 22, 2022Assignee: ZF FRIEDRICHSHAFEN AGInventors: Alexander Jungaberle, Falko Platzer, Werner Wolfgang
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Publication number: 20200254991Abstract: A method for operating a drive train of a motor vehicle may include, for a starting process of an internal combustion engine, transferring the separating clutch from a disengaged condition into an engaged condition or a slip state such that the electric machine accelerates the internal combustion engine to a starting speed. The method may further include actuating a torque-transmitting element between the electric machine and the output shaft to enter a slip state. The method may also include increasing the torque of the electric machine to reliably reach and hold the slip state of the torque-transmitting element. Additionally, the method may include operating the electric machine as a generator or as a motor depending on an expected load direction of the drive train during the starting process to reliably reach and hold the torque-transmitting element in the slip state.Type: ApplicationFiled: February 11, 2020Publication date: August 13, 2020Inventors: Alexander Jungaberle, Falko Platzer, Werner Wolfgang
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Patent number: 9518508Abstract: A control device for a hybrid vehicle having a drive-train with a hybrid drive unit including an internal combustion engine and an electric machine. A clutch is connected between the internal combustion engine and the electric machine. An automatic or automated transmission is connected between the hybrid drive unit and a drive output. When the hybrid vehicle has been driving and comes to a standstill with its internal combustion engine stopped, the control device automatically determines, on the one hand, a starting mode for the subsequent re-starting of the internal combustion engine when the hybrid vehicle is at rest, and the control device, on the other hand, automatically changes at least the transmission and the clutch connected between the internal combustion engine and the electric machine of the hybrid drive unit to a condition appropriate for the starting mode determined by emitting appropriate control signals.Type: GrantFiled: November 5, 2012Date of Patent: December 13, 2016Assignee: ZF Friedrichshafen AGInventors: Werner Wolfgang, Thea Schlueter
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Publication number: 20140311427Abstract: A control device for a hybrid vehicle having a drive-train with a hybrid drive unit including an internal combustion engine and an electric machine. A clutch is connected between the internal combustion engine and the electric machine. An automatic or automated transmission is connected between the hybrid drive unit and a drive output. When the hybrid vehicle has been driving and comes to a standstill with its internal combustion engine stopped, the control device automatically determines, on the one hand, a starting mode for the subsequent re-starting of the internal combustion engine when the hybrid vehicle is at rest, and the control device, on the other hand, automatically changes at least the transmission and the clutch connected between the internal combustion engine and the electric machine of the hybrid drive unit to a condition appropriate for the starting mode determined by emitting appropriate control signals.Type: ApplicationFiled: November 5, 2012Publication date: October 23, 2014Inventors: Werner Wolfgang, Thea Schlueter
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Patent number: 8666623Abstract: A method for controlling and/or regulating an automatic transmission of a vehicle, depending on the driving route slope in which a winding mountain pass road detection is carried out, depending upon a topography of the driving route, in such a way that a time for either setting or resetting winding mountain pass road detection is determined.Type: GrantFiled: October 12, 2007Date of Patent: March 4, 2014Assignee: ZF Friedrichshafen AGInventors: Werner Wolfgang, Matthias Winkel, Bertram Wengert
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Patent number: 8452497Abstract: A method of controlling a shifting operation in an automatic transmission of a commercial vehicle. A targeted gear and an associated target rotational speed are determined, via a transmission control, depending on predetermined parameters, and the shifting operation is executed upon reaching a determined shifting rotational speed. A shift interlock is activated, at least temporarily, during a downshifting operation when, upon reaching the shifting rotational speed, the determined target rotational speed lies below a predetermined rotational speed limit.Type: GrantFiled: June 18, 2009Date of Patent: May 28, 2013Assignee: ZF Friedrichshafen AGInventors: Ulrich Reith, Werner Wolfgang, Bertram Wengert, Maik Wurthner
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Patent number: 8370033Abstract: A method of controlling an automated multi-step change-speed transmission of a vehicle having an electronic control unit connected to sensors for detecting operating parameters and to gear and/or clutch control elements for carrying out shift operations. The control comprises a data memory such that the multi-step change-speed transmission can be operated automatically to initiate gearshifts in an automatic mode, manually initiated by a driver in a manual mode to provide gearshifts, and manually actuated in a learning mode in which gearshifts and operating parameters can be recorded automatically. When necessary to assist technicians in the application of the transmission, a configuration-learning mode that can be activated in which, during a test drive with manual gearshift initiation, operating parameters are automatically detected in an event-dependent manner, processed to produce control data for the transmission, and the control data stored in the data memory for the future control of the transmission.Type: GrantFiled: May 27, 2008Date of Patent: February 5, 2013Assignee: ZF Friedrichshafen AGInventors: Werner Wolfgang, Maik Wuerthner, Ingo Sauter
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Patent number: 8321102Abstract: A method for controlling a drive train of a motor vehicle comprising a drive engine, an automated transmission, and an automated clutch arranged in the force flow between the drive engine and the transmission.Type: GrantFiled: February 21, 2008Date of Patent: November 27, 2012Assignee: ZF Friedrichshafen AGInventors: Maik Wurthner, Werner Wolfgang, Ingo Sauter
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Patent number: 8188385Abstract: A method and device for provisionally determining the mass of a vehicle when it is initialized. After initialization of the vehicle, the method determines a vehicle mass value by a static mass determination method and then checks whether this value is within a predetermined tolerance band around the dynamically last-determined vehicle mass value, which has been stored for that purpose. If this is so, and there has in the meantime been no significant change of the vehicle's mass, the previously stored dynamic vehicle mass value is probably more accurate and is used in the determination. Otherwise it can be assumed that the vehicle mass value has changed substantially, and the statically determined vehicle mass value is therefore used until a device for the dynamic determination of a vehicle mass can supply a more accurate vehicle mass value after a short time.Type: GrantFiled: March 7, 2008Date of Patent: May 29, 2012Assignee: ZF Friedrichshafen AGInventors: Werner Wolfgang, Maik Würthner, Ingo Sauter
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Patent number: 8165764Abstract: A method of controlling an automatic transmission arranged in a vehicle between a drive motor and an axle drive of a drive axle or a transfer box such that the current road inclination is determined and, after driving onto a downhill stretch of road, to increase a braking action of the drive motor and/or a permanent brake, a shift to a lower gear is carried out and after a transition to a traction operation or after driving onto level ground, a shift to a higher gear is carried out. To improve transmission shifting behavior, when transitioning between a downhill stretch and level ground, it is provided that a function for detecting a downhill run-out is started and if a downhill run-out is detected, and a shift to a higher gear is carried out while still in a thrust operation before driving onto the level ground and/or before the transition to traction operation.Type: GrantFiled: September 11, 2008Date of Patent: April 24, 2012Assignee: ZF Friedrichshafen AGInventors: Werner Wolfgang, Maik Wuerthner
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Patent number: 8165763Abstract: A method for controlling gear shifts in an automated stepped gear transmission of a motor vehicle in which operating parameters of the motor vehicle are continuously determined and evaluated for initiating and carrying out a shift from a currently engaged gear to a target gear such that, before a shift, the shift speed for initiating the shift and the target gear are determined. For better adaptation of the shift, in particular the determination of the shift speed and the target gear, to the current driving and operating conditions of the motor vehicle, the shift types “shift-speed-orientated shift” and “target-speed-orientated shift” are provided and, immediately before a shift operation, it is decided, as a function of at least one of the operating parameters in which, of the two shift types, the shift is to be carried out.Type: GrantFiled: April 2, 2007Date of Patent: April 24, 2012Assignee: ZF Friedrichshafen AGInventors: Werner Wolfgang, Maik Wurthner, Ingo Sauter
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Patent number: 8140232Abstract: A process of controlling and/or regulating an automatic transmission in which a predetermined shifting speed of the gear shift is carried out and adjusted during a shift program, and in which the detection of a constant-speed driving of the vehicle is carried out at least during the shift program.Type: GrantFiled: October 11, 2007Date of Patent: March 20, 2012Assignee: ZF Friedrichshafen AGInventors: Werner Wolfgang, Maik Wurthner, Ingo Sauter
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Patent number: 8095286Abstract: A method for controlling a vehicle's automated transmission, which is arranged in a drive train in the force flow between a engine and a drive axle or a transfer box, depending on certain operating parameters and control actions of an adaptive cruise control system (ACC) that can be operated using engine and brake mechanisms to regulate speed and distance from a car in front. The method controls the transmission when an engine torque demand differs from the torque demand of the ACC. The operating mode of the ACC, which is active at the time, and the load direction of the torque demand of the ACC are determined, and the torque demand, used for controlling the transmission when speed or distance regulation is activated, is determined depending on the ACC operating mode and the load direction of the torque demand.Type: GrantFiled: March 17, 2009Date of Patent: January 10, 2012Assignee: ZF Friedrichshafen AGInventors: Werner Wolfgang, Maik Wurthner
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Patent number: 8068964Abstract: A method for determining the driving resistance of a motor vehicle simultaneously with a shift of an automated shift transmission from a load gear to a target gear such that if a difference between a first driving resistance value F_fw_1 and a second driving resistance value F_fw_2 is large, the shift operation can be corrected. The second driving resistance value F_fw_2 is determined during the shift operation. a time interval ?t which contains the traction-force-free phase of the shift, a plurality of acceleration values a_i of the motor vehicle are measured to obtain the minimum acceleration a_min if the shift operation is a traction shift or the maximum acceleration a_max if it is thrust shift. With the mass m of the vehicle, the second driving resistance value F_fw_2 is calculated with one of the formula F_fw_2=?m*a_min or F_fw_2=?m*a_max.Type: GrantFiled: April 25, 2007Date of Patent: November 29, 2011Assignee: ZF Friedrichshafen AGInventors: Werner Wolfgang, Maik Würthner, Ingo Sauter
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Patent number: 8047091Abstract: A method of controlling an automatic transmission of a motor vehicle having clutches controlled by an electronic control unit. A transmission rotational speed in an initial transmission stage is determined. If a first transmission shifting rotational speed is reached, the transmission is shifted from the initial transmission stage to a target transmission stage. A target transmission rotational speed of the target transmission stage is then ascertained. A difference is next ascertained between the target transmission rotational speed and a second shifting transmission rotational speed. An initial counter value, of a counter, is determined, which depends on the transmission rotational speed difference. The counter is next caused to carry out counting, from the initial counter value, as time progresses. If and when the counter value reaches zero, the transmission is shifted from the target transmission stage toward the initial transmission stage.Type: GrantFiled: February 1, 2006Date of Patent: November 1, 2011Assignee: ZF Friedrichshafen AGInventors: Werner Wolfgang, Maik Würthner, Ingo Sauter, Achim Tegen
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Patent number: 7979185Abstract: A method for determining a motor vehicle mass which is implemented in conjunction with shifting an automated shift transmission from a current gear to a desired gear. In determining the mass, a value force and movement parameters are determined partly before or after the shift operation and partly during it. For the more rapid and accurate determination of mass, the drive-wheel-related traction force of the drive engine before and after the shift F_zug_vor, F_zug_nach, the longitudinal acceleration of the vehicle before and after the shift, a_zug_vor, a_zug_nach, and the acceleration a_roll determined in the traction-force-free phase during the shift are determined, and from these and in accordance with the equation m=F_zug/(a_zug?a_roll), a first mass value m_vor=F_zug_vor/(a_zug_vor?a_roll) is calculated for the beginning of the shift and a second mass value m_nach=F_zug_nach/(a_zug_nach?a_roll) is calculated for the end of the shift.Type: GrantFiled: April 25, 2007Date of Patent: July 12, 2011Assignee: ZF Friedrichshafen AGInventors: Werner Wolfgang, Maik Würthner, Ingo Sauter
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Publication number: 20110153173Abstract: A method of controlling an automatic transmission arranged in a vehicle between a drive motor and an axle drive of a drive axle or a transfer box such that the current road inclination is determined and, after driving onto a downhill stretch of road, to increase a braking action of the drive motor and/or a permanent brake, a shift to a lower gear is carried out and after a transition to a traction operation or after driving onto level ground, a shift to a higher gear is carried out. To improve transmission shifting behavior, when transitioning between a downhill stretch and level ground, it is provided that a function for detecting a downhill run-out is started and if a downhill run-out is detected, and a shift to a higher gear is carried out while still in a thrust operation before driving onto the level ground and/or before the transition to traction operation.Type: ApplicationFiled: September 11, 2008Publication date: June 23, 2011Applicant: ZF FRIEDRICHSHAFEN AGInventors: Werner Wolfgang, Maik Wuerthner
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Publication number: 20110106385Abstract: A method of controlling a shifting operation in an automatic transmission of a commercial vehicle. A targeted gear and an associated target rotational speed are determined, via a transmission control, depending on predetermined parameters, and the shifting operation is executed upon reaching a determined shifting rotational speed. A shift interlock is activated, at least temporarily, during a downshifting operation when, upon reaching the shifting rotational speed, the determined target rotational speed lies below a predetermined rotational speed limit.Type: ApplicationFiled: June 18, 2009Publication date: May 5, 2011Applicant: ZF FRIEDRICHSHAFEN AGInventors: Ulrich Reith, Werner Wolfgang, Bertram Wengert, Maik Wurthner
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Publication number: 20100324790Abstract: A method for controlling a drive train of a motor vehicle comprising a drive engine, an automated transmission, and an automated clutch arranged in the force flow between the drive engine and the transmission.Type: ApplicationFiled: February 21, 2008Publication date: December 23, 2010Applicant: ZF FRIEDRICHSHAFEN AGInventors: Maik Wurthner, Werner Wolfgang, Ingo Sauter
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Publication number: 20100185370Abstract: The invention concerns a method for controlling an automated multi-step change-speed transmission of a motor vehicle, which is connected on the input side via at least one controllable friction clutch to a drive motor in the form of an internal combustion engine, and on the output side via an axle drive to the drive wheels of a driven axle, and which comprises a plurality of starting gears (GAnf, G1-G5), such that at the beginning of a starting process one of the starting gears (GAnf, G1-G5) is selected as a function of the vehicle's mass (mFzg) and of the road gradient (?Fb) as the optimum starting gear (GAnf—opt) and is then engaged.Type: ApplicationFiled: June 19, 2008Publication date: July 22, 2010Applicant: ZF FRIEDRICHSHAFEN AGInventors: Maik Wurthner, Werner Wolfgang, Ingo Sauter