Patents Represented by Attorney, Agent or Law Firm Davis and Bujold
  • Patent number: 8251865
    Abstract: A method of carrying out a shift under load during hybrid operation in a parallel hybrid vehicle in which the speed adaptation of the electric machine and the internal combustion engine, required for synchronization to the new gear, is carried out by adapting the speed of the electric machine in a speed regulation mode.
    Type: Grant
    Filed: August 8, 2008
    Date of Patent: August 28, 2012
    Assignee: ZF Friedrichshafen AG
    Inventors: Johannes Kaltenbach, Stefan Wallner
  • Patent number: 8251859
    Abstract: A multi step transmission, of a planetary design, which has an external housing and includes a transmission input shaft and a transmission output shaft. First, second, third and fourth planetary gear sets are each accommodated within the transmission housing along with third, fourth, fifth, sixth, seventh and eighth shafts, and at least six shift elements. The at least six shift elements comprises first and second brakes and first, second, third and fourth clutches, whose selected engagement produces different transmission ratios between the drive shaft and the output shaft such that nine separate forward gears and one reverse gear can be achieved. For each of the forward and reverse gears, only three of the six shift elements are engaged.
    Type: Grant
    Filed: August 19, 2010
    Date of Patent: August 28, 2012
    Assignee: ZF Friedrichshafen AG
    Inventors: Gerhard Gumpoltsberger, Christian Sibla, Stefan Beck, Josef Haupt, Gert Bauknecht, Peter Ziemer
  • Patent number: 8253411
    Abstract: A configuration of a pair of inductor coils within a local measuring range which can comprise a position range or an angle range. For the coil configuration, a nominal distance to a damping part is predefined which comprises an eddy current damping part which covers the coils, to a certain degree. In the evaluation circuit, the coils are connected to a capacitor, forming an oscillator part, whose inductance and capacitance determine a resonant frequency. The characteristic curve, oscillator frequency as a function of the position or the angle is linear. The rectangular inductors of the pair of coils overlap within the measuring range. The linear characteristic curves have a common point of rotation, outside of the measuring range, which is independent from interferences by the measuring configuration.
    Type: Grant
    Filed: July 17, 2008
    Date of Patent: August 28, 2012
    Assignee: ZF Friedrichshafen AG
    Inventor: Andreas Schmitt
  • Patent number: 8251873
    Abstract: A method for actuating a continuously variable clutch such that the torque to be transmitted by the clutch is continuously adjusted either electromechanically via an electromotive drive, hydraulically via a pressure actuator, or electromagnetically via an electromagnetic actuator. The torque transmitted by the clutch is adjusted by utilizing a position-dependent clutch torque specification.
    Type: Grant
    Filed: November 5, 2007
    Date of Patent: August 28, 2012
    Assignee: ZF Friedrichshafen AG
    Inventors: Robert Zdych, Michael Gromus, Claus Granzow
  • Patent number: 8251630
    Abstract: A grain bag handling assembly for a grain bag unloading apparatus having an auger assembly with an input end which is inserted into a mouth of an elongated grain bag and a remote output end. The grain bag handling assembly includes a rotatably mounted spool onto which the grain bag is rolled. The spool has a changeable diameter. A drive motor is provided for rotating the spool.
    Type: Grant
    Filed: June 11, 2009
    Date of Patent: August 28, 2012
    Assignee: Renn Mill Center Inc.
    Inventors: Douglas A. Hilsabeck, Peter Verhoog
  • Patent number: 8251867
    Abstract: A method for operating a drive train of a vehicle in which the drive train has at least an internal combustion engine, an engine clutch, an electric machine, a single and a multi-group manual transmission with synchronized and/or unsynchronized shift elements for shifting gears, an axle transmission, as well as an associated control device for controlling the gear shifts. It is provided for the purpose of expanding the functional possibilities, that the electric machine is used, during gear shifts in the manual transmission, as a mode of synchronization, a synchronization aid, or at least as a shifting aid such that changes in the direction of rotation of the transmission shafts are taken into consideration.
    Type: Grant
    Filed: January 25, 2008
    Date of Patent: August 28, 2012
    Assignee: ZF Friedrichshafen AG
    Inventors: Ulrich Reith, Mario Steinborn
  • Patent number: 8251855
    Abstract: A transmission which comprises an input shaft and an output shaft, first, second, third and fourth planetary gear sets, third, fourth, fifth, sixth, seventh and eighth shafts, first, second, third, fourth and fifth gearshifting elements for achieving eight forward gears and one reverse gear. The first gearshifting element, when engaged, couples the third shaft with a housing of the transmission. The second gearshifting element, when engaged, couples the fourth shaft with the housing of the transmission. The third gearshifting element, when engaged, couples the input first shaft with the fifth shaft. The eighth shaft (8) is coupled with the fourth gearshifting element and the fifth gearshifting element (E), when engaged, couples the fifth shaft (5) and the seventh shaft (7).
    Type: Grant
    Filed: August 15, 2011
    Date of Patent: August 28, 2012
    Assignee: ZF Friedrichshafen AG
    Inventors: Gabor Diosi, Josef Haupt, Gerhard Gumpoltsberger, Peter Ziemer, Martin Brehmer
  • Patent number: 8255102
    Abstract: A steering unit (1), for a steer-by-wire ship control system, comprises a steering wheel (3), a controller (11) that is connected to the electronic controller of the ship control system (ECU) via a CAN bus, a sensor (10) for detecting an angular position of the steering wheel (3), and a unit for generating mechanical resistance in the steering wheel (3), in which the unit for generating mechanical resistance in the steering wheel (3) is an electric motor (8) and the shaft (2) of the steering wheel (3), that is rotationally fixed to the steering wheel (3), is rotationally fixed to the rotor (7) of the electric motor (6), and the stator (8) of the electric motor (6) is rotationally fixed to the housing (5) of the electric motor (6).
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: August 28, 2012
    Assignee: ZF Friedrichshafen AG
    Inventor: Adriano Zanfei
  • Patent number: 8251866
    Abstract: A method for starting the internal combustion engine, in parallel hybrid vehicles, in which the internal combustion engine is started, during a shift under load in purely electric driving operation, by the electric machine.
    Type: Grant
    Filed: August 8, 2008
    Date of Patent: August 28, 2012
    Assignee: ZF Friedrichshafen AG
    Inventor: Johannes Kaltenbach
  • Patent number: 8251852
    Abstract: An arrangement with at least one shifting element (2) arranged within a housing (1) of a transmission which can be hydraulically acted upon with a pressure medium from a pressure medium supply for the purpose of being coupled to and decoupled from at least one component of the transmission. The pressure medium supply to the shifting element (2) is additionally used for the continuous supply of at least one of lubricant and coolant to at least one other structural element arranged within the housing (1) of the transmission.
    Type: Grant
    Filed: May 13, 2010
    Date of Patent: August 28, 2012
    Assignee: ZF Friedrichshafen AG
    Inventor: Thore Bohnstedt
  • Patent number: 8246509
    Abstract: A method for operating a drive train of a motor vehicle. The drive train comprising a hybrid drive with an internal combustion engine and an electric motor, a transmission arranged between the hybrid drive and a drive output, and a clutch arranged between the internal combustion engine and the electric motor. The internal combustion engine is started by engaging the clutch only when the electric motor is providing drive power. In this situation when shifting gears in the transmission with interruption of the traction force, immediately after the gear change and during a load build-up phase of the shift operation, the internal combustion engine is started by the electric motor without traction force interruption. The clutch is controlled to partially engage to start the combustion engine and then it is completely disengaged before reaching a synchronous speed between the combustion engine and the electric motor.
    Type: Grant
    Filed: September 16, 2008
    Date of Patent: August 21, 2012
    Assignee: ZF Friedrichshafen
    Inventors: Christian Mittelberger, Stefan Blattner
  • Patent number: 8245590
    Abstract: A device (1) for transmitting torque from a first shaft (2) to a second shaft (3) of a transmission device, in particular a counter shaft transmission. The device (1) has a first gear (5) supported on the first shaft (2) by a bearing device (4) and which, in an assembled state, engages a second gear (6) arranged on the second shaft (3). The first gear (5) can be shifted into an activated state in which the first gear is connected in a rotationally fixed manner to the first shaft (2). A supporting mechanism (18) is associated with the first gear (5), next to the bearing device (4), via which tilting moments present and acting on the first gear (5), at least in a connected state, are transmitted to and supported by the first shaft (2).
    Type: Grant
    Filed: October 2, 2007
    Date of Patent: August 21, 2012
    Assignee: ZF Friedrichshafen AG
    Inventors: Matthias Reisch, Mark Mohr, Ralf Dreibholz, Gerhard Gumpoltsberger
  • Patent number: 8249787
    Abstract: A process of monitoring a drive direction of an automatic or automated vehicle transmission at near-zero vehicle speed via an engaged gear. A desired direction of drive of the transmission is determined from an engaged gear at the time the vehicle begins motion. An actual direction of drive is determined from the transmission and, if different from the desired direction of drive, an error signal is produced. The process includes determining the actual drive either from a sensed rotational direction of a transmission input shaft and a sensed rotational direction of a transmission output shaft or a sensed valve setting, a sensed pressure in an transmission electro-hydraulic control system or on a transmission shifting element or from a sensed direction of rotation of a transmission gearset element or from axial movement or force of a transmission constructional element.
    Type: Grant
    Filed: April 21, 2010
    Date of Patent: August 21, 2012
    Assignee: ZF Friedrichshafen AG
    Inventors: Georg Gierer, Christian Popp, Thilo Schmidt, Klaus Steinhauser
  • Patent number: 8246516
    Abstract: A method of operating a drive train of a motor vehicle that has at least an automatic transmission and a drive unit. A starting rotational speed is determined for starting the motor vehicle, and a starting process is initiated with the determined starting rotational speed by engaging a starting element, in particular a starting clutch. The starting rotational speed may be individually set by a driver in such a way that, when the automatic transmission is in the neutral position, the engine speed of the drive unit may be determined by the driver by actuating the accelerator pedal, and that once the automatic transmission is shifted from the neutral position to a either a forward gear or a reverse gear, the engine speed of the drive unit, prevailing during the shift of the automatic transmission, is used as the starting rotational speed.
    Type: Grant
    Filed: April 3, 2008
    Date of Patent: August 21, 2012
    Assignee: ZF Friedrichshafen AG
    Inventor: Roland Mair
  • Patent number: 8246504
    Abstract: The multi step transmission comprising gear sets (P1, P2, P3, P4), eight shafts and six shift elements. The sun gear of set (P1) couples the drive shaft, the carrier of set (P1) couples shaft (3) which couples a housing via brake (03), the drive shaft via clutch (13) and shaft (5) via clutch (35). Shaft (5) couples the ring gear of set (P2), to the sun gears of sets (P3, P4), and the drive shaft couples, via clutch (18), shaft (8) that couples the carrier of set (P4). Shaft (6) couples the ring gear of set (P1) and, via clutch (67), shaft (7) that couples the carrier of set (P2). The sun gear of set (P2) couples the housing. The ring gear of set (P3) couples shaft (4) that couples the housing via brake (04). The output shaft couples the ring gear and carrier of sets (P4, P3) respectively.
    Type: Grant
    Filed: August 19, 2010
    Date of Patent: August 21, 2012
    Assignee: ZF Friedrichshafen AG
    Inventors: Gerhard Gumpoltsberger, Christian Sibla, Stefan Beck, Josef Haupt, Gert Bauknecht, Peter Ziemer
  • Patent number: 8245828
    Abstract: A device for rotationally fixing a shaft to a component that is rotatably arranged on the shaft. The actuating element positively engages the components to rotationally fix the components to the shaft. The difference in rotational speeds, between the component and the shaft, can be at least approximately compensated for by the actuating element. The actuating element, for rotationally fixing the component to the shaft by the actuator, is operatively connected to at least one support body, which is rotationally fixed with respect to the shaft in such a manner that the actuating element can act upon the component with an actuating force that depends on the torque to be transmitted from the shaft to the component and which is independent of the actuation of the actuator in the state in which the actuating element can be rotated relative to the shaft.
    Type: Grant
    Filed: October 2, 2007
    Date of Patent: August 21, 2012
    Assignee: ZF Friedrichshafen AG
    Inventors: Matthias Reisch, Mark Mohr
  • Patent number: 8245589
    Abstract: A device (4) for actuating a component mounted to rotate on a shaft (3), preferably a gearwheel (3A to 3D) made as a loose wheel of a transmission device (1). The component can be shifted by an engaging device (4A, 4B) that includes at least one electric actuator (5, 17) to an engaged condition in which the component is connected in a rotationally fixed manner to the shaft (3), and such that the component can be acted upon with the actuation force needed for its engagement or disengagement from inside the shaft (3) outwardly. The electric actuator (5, 17) is at least partially arranged inside the shaft (3).
    Type: Grant
    Filed: October 2, 2007
    Date of Patent: August 21, 2012
    Assignee: ZF Friedrichshafen AG
    Inventors: Mark Mohr, Matthias Reisch, Ralf Dreibholz
  • Patent number: 8239994
    Abstract: A scraping element for a pipeline pig, includes a moulded body having a circular peripheral scraping edge circumscribing the body and adapted to engage an interior surface of a pipeline. The body is adapted to be mounted to a pipeline pig. A wear resistance material embedded in the scraping edge of the body.
    Type: Grant
    Filed: January 9, 2008
    Date of Patent: August 14, 2012
    Assignee: Opus Services, Inc.
    Inventor: John Dyck
  • Patent number: 8241174
    Abstract: A method for controlling a drivetrain including a combustion engine, electric motor/generator and a transmission inter-coupled, via a summarizing gear, with one output and two input elements and, via a clutch, with each other. One input element is fixed to the engine, the second input element is fixed to the motor/generator and the output element is fixed to the input shaft of the transmission. The clutch is between two elements of the summarizing gear. Before a gearshift, torques of the engine and motor/generator are reduced and the clutch disengaged. To quickly reduce torque in the summarizing gear, the engine torque is reduced after a defined time, such that the clutch disengages when the slippage is proportional to the lowering engine torque and the motor/generator torque, in a ratio of torques at the beginning of torque reduction, is reduced proportionally to the engine torque.
    Type: Grant
    Filed: January 16, 2007
    Date of Patent: August 14, 2012
    Assignee: ZF Friedrichshafen AG
    Inventors: Stefan Wallner, Notker Amann
  • Patent number: 8241171
    Abstract: A multi step transmission comprising a drive shaft, an output shaft, four planetary gear sets each having a sun gear, a carrier and a ring gear, third, four, fifth, six, seventh and eighth rotatable shafts and at least six shift elements for selectively engaging different transmission ratios between the drive shaft and the output shaft such that nine forward gears and one reverse gear can be implemented. For each one of the nine forward gears and one reverse gear only three of the at least six shift elements are engaged. The sixth shaft is operatively connectable to the sun gear of the third platentary gear set via either a direct connection or a releasable connection.
    Type: Grant
    Filed: August 19, 2010
    Date of Patent: August 14, 2012
    Assignee: ZF Friedrichshafen AG
    Inventors: Gerhard Gumpoltsberger, Christian Sibla, Stefan Beck, Josef Haupt, Gert Bauknecht, Peter Ziemer