Patents by Inventor Kai Bornträger

Kai Bornträger 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: 9291243
    Abstract: A motor vehicle powershift transmission which comprising two partial transmissions (TG1, TG2) each with a respective input shaft (GE1, GE2) that can be drivingly connected, via a main separator clutch (CL1, CL2; CL1?, CL2?; CL1*, CL2*), with the driveshaft (TW) of a drive engine (VM) and, on the output side, with a common output shaft (GA). To enable powershifts without frictional slipping, the two input shafts (GE1, GE2), on the input side, can be connected to and disconnected from a respective intermediate shaft (ZW1, ZW2) by the respective main separator clutch (CL1, CL2; CL1?, CL2?; CL1*, CL2*). The first intermediate shaft (ZW1) is directly connected to the driveshaft (TW) and the second intermediate shaft (ZW2) is in driving connection with the first intermediate shaft (ZW1) by way of a variator (V) which has a continuously adjustable transmission ratio (iV) and a rest transmission ratio having the value one iV—0=1).
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: March 22, 2016
    Assignee: ZF Friedrichshafen AG
    Inventors: Kai Borntraeger, Bernard Hunold, Johannes Kaltenbach
  • Publication number: 20160025189
    Abstract: A vehicle transmission having first and second transmission input shafts (GE1, GE2) and having at least three planetary gear sets (PG1, PG2, PG3). A sub-transmission (TG1, TG2) is allocated to each of first and second transmission input shafts (GE1, GE2) and one of first and second sub-transmissions (TG1, TG2) comprises at least the first planetary gear set (PG1), and the other of first and second sub-transmissions (TG1, TG2) comprises at least the second planetary gear set (PG2). To ensure that the vehicle transmission is economically manufactured and useful for both conventional and hybrid drive trains, a provision is that the transmission input shafts (GE1, GE2) be effectively connected or effectively connectable with the planetary gear sets (PG1, PG2, PG3), that it be possible to variably activate first and second sub-transmissions (TG1, TG2) for implementing multiple gears, and that one of the gears be shiftable as a direct-drive gear.
    Type: Application
    Filed: February 12, 2014
    Publication date: January 28, 2016
    Applicant: ZF FRIEDRICHSHAFEN AG
    Inventors: Johannes KALTENBACH, Peter ZIEMER, Kai BORNTRÄGER
  • Publication number: 20160017968
    Abstract: A drive-train for a vehicle with at least one electric drive, which can be coupled via a driveshaft (2) to at least a first transmission ratio stage (i1) and a second transmission ratio stage (i2). At least one shifting mechanism is provided for engaging the transmission ratio stages (i1, i2). To carry out powershifts, the shifting mechanism includes at least one interlocking shifting element (5) and at least one frictional shifting element (6, 6A). Each of the transmission ratio stages (i1, i2) can be engaged by the interlocking shifting element (5) and at least one of the transmission ratio stages (i2) can be engaged both by the interlocking shifting element (5) and by the frictional shifting element (6). Methods for carrying out a powershift, between a frictional shifting element (6, 6A) and an interlocking shifting element (5) in the drive-train, are also disclosed.
    Type: Application
    Filed: February 12, 2014
    Publication date: January 21, 2016
    Inventors: Johannes KALTENBACH, Matthias REISCH, Ulrich KEHR, Michael PREUß, Kai BORNTRÄGER
  • Patent number: 8905890
    Abstract: A range-change transmission having a main transmission, an upstream splitter group and a downstream range group. The main transmission comprises planetary gearsets (PS2, PS3). A ring gear of gearset (PS2) is rotationally fixed to an input shaft of the main transmission. A planetary carrier of gearset (PS2) is fixed, via an intermediate shaft, to the sun gear of gearset (PS3). By way of one dual shifting element, the sun gear of gearset (PS2) can be selectively locked to the housing or rotationally fixed to the intermediate shaft. By way of two single shifting elements, the planetary carrier of gearset (PS3) can be locked to the housing or rotationally fixed to the output shaft of the main transmission. By way of another dual shifting element, the ring gear of gearset (PS3) can be locked to the housing or rotationally fixed to the output shaft of the main transmission.
    Type: Grant
    Filed: May 1, 2013
    Date of Patent: December 9, 2014
    Assignee: ZF Friedrichshafen AG
    Inventor: Kai Borntraeger
  • Publication number: 20140329633
    Abstract: A motor vehicle powershift transmission which comprising two partial transmissions (TG1, TG2) each with a respective input shaft (GE1, GE2) that can be drivingly connected, via a main separator clutch (CL1, CL2; CL1?, CL2?; CL1*, CL2*), with the driveshaft (TW) of a drive engine (VM) and, on the output side, with a common output shaft (GA). To enable powershifts without frictional slipping, the two input shafts (GE1 GE2), on the input side, can be connected to and disconnected from a respective intermediate shaft (ZW1, ZW2) by the respective main separator clutch (CL1, CL2; CL1?, CL2?; CL1*, CL2*). The first intermediate shaft (ZW1) is directly connected to the driveshaft (TW) and the second intermediate shaft (ZW2) is in driving connection with the first intermediate shaft (ZW1) by way of a variator (V) which has a continuously adjustable transmission ratio (iV) and a rest transmission ratio having the value one iV—0=1).
    Type: Application
    Filed: April 8, 2014
    Publication date: November 6, 2014
    Applicant: ZF Friedrichshafen AG
    Inventors: Kai BORNTRAEGER, Bernard HUNOLD, Johannes KALTENBACH
  • Patent number: 8702546
    Abstract: A device for a drive-train of a hybrid vehicle having a planetary gear system that comprises three elements, namely, a ring gear, sun gear and carrier. A first element of these elements of the planetary gear system has a fixed connection with a transmission input shaft of a transmission. A second element of the elements of the planetary gear system has a fixed connection with an electric machine of a hybrid drive. A clutch which can couple two of the three elements of the planetary gear system with one another. Additionally, a shifting element is provided by which a third element, of these three elements of the planetary gear system, can be coupled, in a first shift position, to an internal combustion engine of the hybrid drive and, in a second shift position, to one of a housing or a stator.
    Type: Grant
    Filed: November 8, 2011
    Date of Patent: April 22, 2014
    Assignee: ZF Friedrichshafen AG
    Inventors: Johannes Kaltenbach, Kai Borntraeger
  • Patent number: 8696506
    Abstract: A device for a drive train of a hybrid vehicle having a planetary gear set (4) including a ring gear (9), a sun gear (10) and a carrier (8). A first element of these elements of the planetary gear set serves as the connection to a transmission input shaft (11) of a transmission (3) and a second element of these elements of the planetary gear set serves as the connection to an electric machine (2) of a hybrid drive. A clutch (5) and associated shift element (6) by which, in a first shift position (A), a third element of the planetary gear set can be coupled to an internal combustion engine (1) of the hybrid drive while in a second shift position (B), can be coupled to one of the other elements of the planetary gear set (4).
    Type: Grant
    Filed: October 18, 2012
    Date of Patent: April 15, 2014
    Assignee: ZF Friedrichshafen AG
    Inventors: Johannes Kaltenbach, Kai Bornträger
  • Publication number: 20140097061
    Abstract: A device and a method for rapid disengagement of a clutch (2). The device has a mechanical transmission path (26) which is arranged between a clutch actuator (12) and a first clutch part and comprises a knee lever (4) which facilitates rapid disengagement of the clutch (2).
    Type: Application
    Filed: October 8, 2013
    Publication date: April 10, 2014
    Applicant: ZF Friedrichshafen AG
    Inventors: Kai BORNTRAEGER, Thorsten LEIM
  • Patent number: 8684875
    Abstract: A device for a drive-train of a hybrid vehicle comprising a planetary gearset having three elements which comprise a carrier, a sun gear and a ring gear. A first elements serves as a fixed connection of a first input shaft of a first partial transmission of a transmission. A second of the elements serves as a fixed connection of a hybrid drive electric machine. A first shifting element connects, in a first position thereof, a third of the elements to a second input shaft of a second partial transmission, to which a hybrid drive combustion engine can be coupled. The first shifting element, when in a second position, connects the third of the elements to the housing or the stator. A second shifting element, when engaged, couples the two input shafts of the two partial transmissions with one another and, when disengaged, separates the two input shafts from one another.
    Type: Grant
    Filed: November 8, 2011
    Date of Patent: April 1, 2014
    Assignee: ZF Friedrichshafen AG
    Inventors: Johannes Kaltenbach, Kai Borntraeger
  • Publication number: 20130296097
    Abstract: A range-change transmission having a main transmission, an upstream splitter group and a downstream range group. The main transmission comprises planetary gearsets (PS2, PS3). A ring gear of gearset (PS2) is rotationally fixed to an input shaft of the main transmission. A planetary carrier of gearset (PS2) is fixed, via an intermediate shaft, to the sun gear of gearset (PS3). By way of one dual shifting element, the sun gear of gearset (PS2) can be selectively locked to the housing or rotationally fixed to the intermediate shaft. By way of two single shifting elements, the planetary carrier of gearset (PS3) can be locked to the housing or rotationally fixed to the output shaft of the main transmission. By way of another dual shifting element, the ring gear of gearset (PS3) can be locked to the housing or rotationally fixed to the output shaft of the main transmission.
    Type: Application
    Filed: May 1, 2013
    Publication date: November 7, 2013
    Applicant: ZF Friedrichshafen AG
    Inventor: Kai BORNTRAEGER
  • Publication number: 20130267367
    Abstract: A device for a drive-train of a hybrid vehicle comprising a planetary gearset having three elements which comprise a carrier, a sun gear and a ring gear. A first elements serves as a fixed connection of a first input shaft of a first partial transmission of a transmission. A second of the elements serves as a fixed connection of a hybrid drive electric machine. A first shifting element connects, in a first position thereof, a third of the elements to a second input shaft of a second partial transmission, to which a hybrid drive combustion engine can be coupled. The first shifting element, when in a second position, connects the third of the elements to the housing or the stator. A second shifting element, when engaged, couples the two input shafts of the two partial transmissions with one another and, when disengaged, separates the two input shafts from one another.
    Type: Application
    Filed: November 8, 2011
    Publication date: October 10, 2013
    Applicant: ZF Friedrichshafen AG
    Inventors: Johannes Kaltenbach, Kai Borntraeger
  • Publication number: 20130256087
    Abstract: A method of actuating a shifting element with three shift positions, having a simply controlled shifting cylinder as the actuating element, a shifting element for shifting to the three shift positions and a pressure regulator, such that the shifting cylinder is designed as a cylinder with one working line and the shifting element is pushed by the spring force of at least one spring element to an end position and moved to the other shift positions in opposition to the spring force. The central position is recognized in that, when the correct shifting element position is reached, the force for moving the shifting element in opposition to the spring force abruptly increases and, because of this, a specific pressure can be set by a pressure regulator for the central position.
    Type: Application
    Filed: March 21, 2013
    Publication date: October 3, 2013
    Applicant: ZF Friedrichshafen AG
    Inventors: Kai BORNTRAEGER, Markus MUELLER
  • Publication number: 20130260939
    Abstract: A device for a drive-train of a hybrid vehicle having a planetary gear system that comprises three elements, namely, a ring gear, sun gear and carrier. A first element of these elements of the planetary gear system has a fixed connection with a transmission input shaft of a transmission. A second element of the elements of the planetary gear system has a fixed connection with an electric machine of a hybrid drive. A clutch which can couple two of the three elements of the planetary gear system with one another. Additionally, a shifting element is provided by which a third element, of these three elements of the planetary gear system, can be coupled, in a first shift position, to an internal combustion engine of the hybrid drive and, in a second shift position, to one of a housing or a stator.
    Type: Application
    Filed: November 8, 2011
    Publication date: October 3, 2013
    Applicant: ZF Friedrichshafen AG
    Inventors: Johannes Kaltenbach, Kai Borntraeger
  • Patent number: 8475330
    Abstract: The invention relates to a method and a device for controlling a creep mode of a vehicle having a hybrid drive system (1, 1?), having a parallel hybrid drivetrain (2, 2?) comprising an internal combustion engine (3), at least one electrical machine (5), a first switching element (4) designed as a frictional element and disposed between the internal combustion engine (3) and the electrical machine (5), by means of which the internal combustion engine (3) can be connected to the electrical machine (5), a gearbox (7), an output (26), and at least one second switching element (6) designed as a frictional element and disposed between the electrical machine (5) and the output (26), by means of which the electrical machine (5) can be operationally connected to the output (26).
    Type: Grant
    Filed: December 2, 2008
    Date of Patent: July 2, 2013
    Assignee: ZF Friedrichshafen AG
    Inventors: Johannes Kaltenbach, Kai Bornträger, Stefan Wallner, Christian Mittelberger
  • Patent number: 8444519
    Abstract: A hybrid drive train of a motor vehicle which comprises a combustion engine, an electric machine which is operable as a motor and a generator and comprises a stator and a rotor, and a multi-stage planetary transmission with input and output shafts. The driveshaft of the combustion engine can be connected to the input shaft of the transmission, the electric machine is coaxially arranged about the input shaft, and the rotor of the electric machine is rigidly connected with the input shaft. To achieve a starting acceleration and climbing capacity on starting, corresponding to those provided by a drive train with an automatic transmission and a hydrodynamic torque converter or a manual gearshift transmission with a converter shifting clutch, the rotor of the electric machine can be connected with the transmission input shaft via an input transmission stage which is formed as a simple planetary gearset and has a high gear ratio.
    Type: Grant
    Filed: September 7, 2009
    Date of Patent: May 21, 2013
    Assignee: ZF Friedrichshafen AG
    Inventors: Kai Borntraeger, Rene Budach, Axel Michael Mueller
  • Patent number: 8292779
    Abstract: A method of operating a drive train having a hybrid drive that comprises an internal combustion engine and an electric machine, a clutch connected between the combustion engine and electric machine, a transmission connected between the electric machine and an output drive, and a start-up element connected between the electric machine and the output drive. The method for starting-up the drive train, when the clutch connected between the combustion engine and the electric machine and the start-up element are both disengaged, and the electric machine is stopped and short-circuited. The method comprising the steps of accelerating the internal combustion engine to a rotational speed which depends on a short circuit torque of the electric machine that must be overcome; engaging the clutch connected between the combustion engine and electric machine; and bringing the combustion engine to a start-up speed depending on the driver's request; and engaging the start-up element.
    Type: Grant
    Filed: August 25, 2010
    Date of Patent: October 23, 2012
    Assignee: ZF Friedrichshafen AG
    Inventors: Johannes Kaltenbach, Kai Borntraeger, Axel Michael Mueller
  • Patent number: 8262538
    Abstract: A transmission device with at least two multi-gear transmission groups. Torque is introduced via a input shaft into the transmission groups and into the other transmission group via a main shaft. The input shaft is directly connected with the main shaft via a shifting element during a gearshift to achieve an intermediate gear. When the intermediate gear is engaged, torque passes to the shafts connected to each other via the shifting element. A method for operating transmission, during the gearshift, includes introducing torque from the electric machine to the shafts connected via the shifting element and adjusting the rotational speed of the input shaft to the rotational speed of the target gear. A further shifting element is engaged in the first transmission group, the shifting element is disengaged, and torque of the electric machine is reduced, once the rotational speeds of the input shaft and the target gear match one another.
    Type: Grant
    Filed: January 25, 2008
    Date of Patent: September 11, 2012
    Assignee: ZF Friedrichshafen AG
    Inventor: Kai Borntraeger
  • Patent number: 8257215
    Abstract: A multi-speed planetary coupling transmission (3) which includes a plurality of planetary gear sets (4, 5, 6) and a plurality of shifting elements (A, B, D, E). Depending on actuation of the shifting elements (A, B, D, E), various gear ratios can be achieved by the transmission. At least one provided electric machine (EM1) is functionally connected with one of the planetary gear sets (6). From the electric machine (EM1), a torque can be introduced, via a shaft (6B) of the planetary gear set (6) associated with the electric machine (EM1), in order to support torque acting on the associated planetary gear set (6) and achieve a gear ratio in the transmission (3) via the electric machine (EM1).
    Type: Grant
    Filed: January 25, 2008
    Date of Patent: September 4, 2012
    Assignee: ZF Friedrichshafen AG
    Inventor: Kai Borntraeger
  • Patent number: 8161835
    Abstract: An automated multi-group standard transmission, for a utility vehicle, and a process for changing gears in the multi-group transmission. The multi-group transmission includes at least two multi-speed transmission groups arranged one after the other, such that a multitude of gears can be shifted. A transmission input shaft that can be connected to an engine, via a startup element, is associated with a first transmission group and a second transmission main shaft is associated with a second transmission group. Load shifting mechanisms produce a temporary direct connection between the transmission input shaft and the transmission main shaft such that an intermediate gear can be shifted during a gear change from an original gear into a target gear. The load shifting mechanism enables gear changes that are virtually free of interruptions in load transfer during a gear change from a lower to a higher gear, thus increasing a high operational comfort.
    Type: Grant
    Filed: April 25, 2007
    Date of Patent: April 24, 2012
    Assignee: ZF Friedrichshafen AG
    Inventor: Kai Bornträger
  • Publication number: 20110263370
    Abstract: A hybrid drive train of a motor vehicle which comprises a combustion engine, an electric machine which is operable as a motor and a generator and comprises a stator and a rotor, and a multi-stage planetary transmission with input and output shafts. The driveshaft of the combustion engine can be connected to the input shaft of the transmission, the electric machine is coaxially arranged about the input shaft, and the rotor of the electric machine is rigidly connected with the input shaft. To achieve a starting acceleration and climbing capacity on starting, corresponding to those provided by a drive train with an automatic transmission and a hydrodynamic torque converter or a manual gearshift transmission with a converter shifting clutch, the rotor of the electric machine can be connected with the transmission input shaft via an input transmission stage which is formed as a simple planetary gearset and has a high gear ratio.
    Type: Application
    Filed: September 7, 2009
    Publication date: October 27, 2011
    Applicant: ZF FRIEDRICHSHAFEN AG
    Inventors: Kai Borntraeger, Rene Budach, Axel Michael Mueller