Patents Represented by Attorney, Agent or Law Firm Davis and Bujold
  • Patent number: 7828096
    Abstract: The invention proposes a hybrid drive for a vehicle with a power train, which has a first electric machine (4), which is permanently connected to an input shaft (3) of the vehicle transmission (2) arranged between an internal combustion engine (1) and a vehicle transmission (2) with changeable gear ratio, and which can be operated as an engine or as a generator, and a hydraulic pump (5) for the vehicle transmission (2), in which at least one first shiftable clutch device (7) is arranged between the internal combustion engine (1) and the vehicle transmission (2), and in which the hydraulic pump (5) is torque-proof connected to the input shaft (3) of the vehicle transmission (2). A hybrid drive is also proposed, which comprises two electric machines, in which the hydraulic pump (5) is coupled via at least one element for force transfer to the input shaft (3) of the vehicle transmission (2).
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: November 9, 2010
    Assignee: ZF Friedrichshafen AG
    Inventors: Markus Hoher, Linus Eschenbeck
  • Patent number: 7824302
    Abstract: A transmission having gearsets (RS1-RS4), shafts (1-8) and shifting elements (A-E). A carrier of gearset (RS4) and an input shaft forming shaft (1), a carrier of gearset (RS3) and an output shaft form shaft (2), sun gears of gearsets (RS3, RS4) form shaft (3). A ring gear of gearset (RS1) forms shaft (4). Ring and sun gears respectively of gearsets (RS2, RS1) couple as shaft (5), a carrier of gearset (RS1) and a ring gear of gearset (RS3) form shaft (6), sun and ring gears respectively of gearsets (RS2, RS4) couple as shaft (7). A carrier of gearset (RS2) forms shaft (8). Located in the flow of power: elements (A, B) are respectively between shafts (3, 4) and a housing, element (C) between shafts (5, 1), element (D) between shafts (8, 2) or (8, 6) and element (E) between two of shafts (5, 7, 8).
    Type: Grant
    Filed: March 15, 2006
    Date of Patent: November 2, 2010
    Assignee: ZF Friedrichshafen AG
    Inventors: Gabor Diosi, Josef Haupt, Gerhard Gumpoltsberger, Peter Ziemer, Hagen Döpfert, Uwe Firzlaff, Martin Brehmer, Christoph Hutzel
  • Patent number: 7827001
    Abstract: A method for detecting fault in an actuator. By transmitting a control value, which is generated by a control unit, to an input of the actuator a signal for the measured actuator position is produced at the output of the actuator. The signal for the measured actuator position is sent to an input of a signal conditioning unit which determines from it a measure of actuator movement. The control value is also transmitted to an input of a modeling unit, which calculates from it an expected measure of actuator movement. These movements are sent to a computer unit, which produces a corresponding status signal for the functionality of the actuator and for the functionality of the sensor for determining the actuator position.
    Type: Grant
    Filed: February 21, 2007
    Date of Patent: November 2, 2010
    Assignee: ZF Friedrichshafen AG
    Inventors: Florian Schneider, Roland Mair, Bernd Apfelbacher, Thomas Jäger
  • Patent number: 7823710
    Abstract: Description of a hydraulic control system (1A) for a hydrodynamic torque converter (1) with a controlled torque converter lockup clutch (2) of an automatic transmission for controlling a supply pressure (p_WD_zu) of the torque converter (2) and a supply pressure (p_WK_zu) of the torque converter lockup clutch (2). The torque converter lockup clutch (2) is engaged when the supply pressure (p_WD_zu) of the torque converter (1) is lower than a predefined pressure level of the supply pressure (p_WK_zu) of the torque converter lockup clutch. A converter pressure valve (WDV) is provided for controlling the supply pressure (p_WD_zu) of the torque converter (1), and a converter coupling valve (WKV) for controlling the supply pressure (p_WK_zu) of the torque converter lockup clutch, where their valve slides (WDV_S, WKV_S) can be acted upon by at least one pre-control pressure (p_VS) and one system pressure (p_sys).
    Type: Grant
    Filed: March 16, 2006
    Date of Patent: November 2, 2010
    Assignee: ZF Friedrichshafen AG
    Inventors: Georg Gierer, Thilo Schmidt, Tobias Rolser
  • Patent number: 7820089
    Abstract: A method for forming an array of three dimensional electrode elements for micro-batteries, including forming a plurality of first parallel channels in a substrate, filling the plurality of first channels with a sacrificial filler material, forming at least one plurality of second parallel channels, each of the pluralities of channels being oriented in a different direction, and removing the sacrificial filler material to leave a grid array of electrode elements. The method may further include a preliminary step of depositing a sacrificial coating onto the surface of the substrate and a final step of removing the sacrificial coating and any debris resulting from the channel forming steps deposited thereon.
    Type: Grant
    Filed: January 9, 2009
    Date of Patent: October 26, 2010
    Assignee: Hitachi Via Mechanics, Ltd.
    Inventor: Todd E. Lizotte
  • Patent number: 7819332
    Abstract: A bypass valve for blocking oil flow through a radiator from a transmission with low oil temperatures includes an oil supply from the radiator, an oil supply, via a bypass line, an oil outlet and a valve unit arranged inside the valve housing. The valve unit includes a compression spring and a heat sensitive element, which move depending on the oil temperature such that when the temperature falls below a threshold value, the oil supply from the radiator is closed and the supply, via a bypass line, is opened. When the oil temperature rises above the threshold value, the oil supply from the radiator is opened and the supply, via the bypass line, is closed. The valve unit can be axially moved against the force of the compression spring, when a predefined oil pressure is reached, thus opening the supply, via the bypass line.
    Type: Grant
    Filed: September 27, 2006
    Date of Patent: October 26, 2010
    Assignee: ZF Friedrichshafen AG
    Inventors: Hans-Joachim Martin, Anton Fritzer
  • Patent number: 7819775
    Abstract: An arrangement of two adjacent planetary gearsets (1, 2) in a housing of a transmission of a vehicle. In the arrangement a ring gear carrier (3) is connected to ring gear (19) of the first planetary gearset (1) and a sun gear (8) of the second planetary gearset (2), which is connected to a shaft (5) of the transmission, such that torque is transferred between the ring gear (19) of the first planetary gearset (1) and the shaft of the transmission (5). The ring gear carrier (3) is therefore engaged both with the shaft (5) of the transmission and with the sun gear (8) of the second planetary gearset (2).
    Type: Grant
    Filed: August 6, 2008
    Date of Patent: October 26, 2010
    Assignee: ZF Friedrichshafen AG
    Inventors: Peter Ziemer, Gert Bauknecht
  • Patent number: 7819774
    Abstract: A positively-locking connection between two components of a transmission that have round cross-sections, designed to support axial forces. A first component to be connected has an annular flange with windows stamped out around its circumference. The windows enable simple deformation of the annular flange. The second component to be connected has an annular groove such that after bringing the two components together, the annular flange of the first component, when viewed axially, is positioned over the annular groove of the second component, such that the annular flange of the first component can be pressed radially into the annular groove of the second component so that segments of the annular flange radially engage the annular groove.
    Type: Grant
    Filed: May 14, 2008
    Date of Patent: October 26, 2010
    Assignee: ZF Friedrichshafen AG
    Inventors: Josef Haupt, Martin Brehmer, Heinz-Günther Hilpert
  • Patent number: 7814813
    Abstract: A hydrostatic-mechanical transmission having a radial piston motor (1) with a crankshaft (2) which drives a spur gear (7). A transmission housing comprises three housing portions which define two separate spaces. The spur gear arrangement is located in one of the spaces while the radial piston motor is located in the other space.
    Type: Grant
    Filed: September 13, 2007
    Date of Patent: October 19, 2010
    Assignee: ZF Friedrichshafen AG
    Inventors: Jurgen Legner, Klaus Baumann, Martin Haffner
  • Patent number: 7815534
    Abstract: An arrangement is proposed for a planetary gearset (2) with an axially adjacent shift element in a housing (1) of a transmission of a vehicle, such that the planetary gearset (2) is connected to the shift element for torque transfer, and such that a non-destructively detachable connection is provided between the shift element and the planetary gearset (2).
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: October 19, 2010
    Assignee: ZF Friedrichshafen AG
    Inventor: Gerhard Höckl
  • Patent number: 7811199
    Abstract: A method for operating a multi-speed automatic transmission of a motor vehicle. The automatic transmission has multiple shift elements for transmitting torque and/or power. When in forward and reverse gears, a first number of shift elements are engaged, and a second number of shift elements are disengaged. To improve the shift speed of successive upshifts and/or successive downshifts which are implemented in an overlapped manner, during a first upshift and/or downshift, at least one shift element, necessary for a successive second upshift and/or downshift, is prepared during the first upshift and/or downshift such that when the first upshift and/or downshift reaches a synchronous point, immediate implementation of the successive second upshift and/or downshift is possible. Depending on a gear change to be implemented, the first upshift and/or downshift from a current gear to a desired gear is preferably implemented as a multiple shift rather than a single shift.
    Type: Grant
    Filed: June 7, 2007
    Date of Patent: October 12, 2010
    Assignee: ZF Friedrichshafen AG
    Inventors: Christian Popp, Klaus Steinhauser, Gerald Klein
  • Patent number: 7810626
    Abstract: A vehicle transmission having shifting elements (A-E) and a parking brake for locking a drive train output and a method for controlling the transmission. Activation of the parking brake depends on a driver's control action. Deactivating the parking brake, when the vehicle is on a slope greater or lesser than a preset value and depending on the slope, a combination of shifting elements (A, D) or (B, D) frictionally slip, such that the output rotates against the strain on a parking brake locking element, caused by the slope, to partially eliminate this strain. Next, one of shifting elements (C, A or B) engages locking the output. The parking brake is then released and finally, the engaged shifting element (C or A or B) is disengaged in a regulated manner, such that the output can be driven according to the driver's control action.
    Type: Grant
    Filed: July 13, 2005
    Date of Patent: October 12, 2010
    Assignee: ZF Friedrichshafen AG
    Inventors: Peter Schiele, Peter Ziemer
  • Patent number: 7806145
    Abstract: There is provided a housing for a flow conditioner. The housing comprises a body having first and second pipe connections, a flow passage between the pipe connections, a carrier receiving cavity within the flow passage, and an opening corresponding to the carrier receiving cavity. A plate carrier has a sealing portion and a flow conditioner carrying portion. The sealing portion has a sealing surface for sealing the opening corresponding to the carrier receiving cavity, and the flow conditioner carrying portion depends from the sealing portion. The flow conditioner carrying portion is sized to be inserted through the opening and into the carrier receiving cavity, and has a plurality of set screw receiving apertures or a retaining lip for securing the flow conditioner. There is a connector for securing the plate carrier within the body such that the sealing surface seals against the body.
    Type: Grant
    Filed: October 23, 2009
    Date of Patent: October 5, 2010
    Inventor: Derold Gary Clark
  • Patent number: 7806013
    Abstract: The invention relates to a regulating mechanism for operating an actuator or connecting element (11, 12) of an automatic transmission. The regulating mechanism has an actuator (3), a regulating mechanism (4), a transmission element (6), and an output element (8, 9). According to the present invention, the actuator (3) is configured as a three phase motor, advantageously as an asynchronous motor. The torque (M) of the actuator (3) is converted into an actuating force (S) in the transmission element (6), which is then applied to a regulated and or connecting element (11, 12).
    Type: Grant
    Filed: July 27, 2005
    Date of Patent: October 5, 2010
    Assignee: ZF Friedrichshafen AG
    Inventors: Bernd Schepperle, Eckhardt Lübke, Karl-Hermann Ketteler, Andreas Fuessl
  • Patent number: 7803082
    Abstract: A transmission including an input and output shafts, gearsets (RS1-RS4), shafts (1-8) and elements (A-E). Carriers respectively of gearsets (RS4, RS3) and the input and output shafts respectively form shafts (1, 2), sun gears of gearsets (RS1, RS4) form shaft (3). A ring gear and carrier respectively of gearsets (RS1, RS2) form shafts (4, 8). A ring and sun gear respectively of gearsets (RS2, RS3) form shaft (5), a carrier a ring gear respectively of gearsets (RS1, RS3) form shaft (6), a sun gear of gearset (RS2) and a ring gear of gearset (RS4) form shaft (7). In the power flow, elements (A, B) are respectively between shafts (3, 4) and the housing; element (C) between shafts (5, 1), element (D) between shafts (8, 2) or (8, 6); element (E) between two of shafts (5, 7, 8). Gearsets (RS2, RS4) are axially and radially aligned between gearsets (RS1, RS3).
    Type: Grant
    Filed: March 15, 2006
    Date of Patent: September 28, 2010
    Assignee: ZF Friedrichshafen AG
    Inventors: Gabor Diosi, Josef Haupt, Peter Ziemer, Martin Brehmer
  • Patent number: 7804674
    Abstract: An electromagnetic actuator and a method for controlling the actuator comprising at least one armature (3) and two coils (1, 2). The voltage gradient at the two coils (1, 2) is measured during a sudden increase in voltage. From this measured data, a subtractor (16) computes a third voltage gradient (25) from which a logic unit (17) determines the position of the armature (3) without the use of an additional sensor.
    Type: Grant
    Filed: April 4, 2006
    Date of Patent: September 28, 2010
    Assignee: ZF Friedrichshafen AG
    Inventors: Reiner Keller, Kai Heinrich, Michael Pantke
  • Patent number: 7798032
    Abstract: An electromechanically activated motor vehicle transmission (31, 14) such as an automated manual transmission (31) or a transfer case (14). This transmission includes at least a transmission housing (11), an electromagnetic selecting or shifting device (1) and an electric motor (2, 8, 22) by which the selecting or shifting device (1) can be actuated. In the inventive motor vehicle transmission (31, 14), the electric motor (2, 8, 22) of the selecting or shifting mechanism (1) arranged within the transmission housing (11) and the motor housing (9, 12, 24) of the electric motor (2, 8, 22) is designed so that it corresponds to a portion of the transmission housing (11).
    Type: Grant
    Filed: December 2, 2005
    Date of Patent: September 21, 2010
    Assignee: ZF Friedrichshafen AG
    Inventors: Bernd Schepperle, Hubert Remmlinger, Karl-Hermann Ketteler, Kai Heinrich, Peter Feulner
  • Patent number: 7798271
    Abstract: A process for actuating a hydraulic storage device (5) of a transmission unit comprising a storage space (9) whose volume can be varied between a minimum and a maximum. The volume of the storage space can be changed by acting upon the storage space with pressurized hydraulic fluid from a pressure supply (19) of the transmission unit. To overcome a restoring tendency of the hydraulic storage device, the pressure is set to a threshold value. A holding device (12) holds the hydraulic storage device at least in the operating condition that corresponds to the maximum volume of the storage space against the restoring tendency. The storage space is acted upon by the pressure supply with a pressure corresponding to a threshold value (P_threshold) until the hydraulic storage device reaches the operating condition in which it can be held by the holding device.
    Type: Grant
    Filed: September 6, 2007
    Date of Patent: September 21, 2010
    Assignee: ZF Friedrichshafen AG
    Inventors: Peter Schiele, Armin Thiele, Klaus Steinhauser
  • Patent number: 7801655
    Abstract: A signal processing system with rapid signal processing, for example for controlling the transmission of a motor vehicle, with an input module that calls for a desired reaction by emitting a request signal, a signal processing module, and a target module that implements the desired reaction, which, to accelerate processing, provides that several steps are carried out in parallel, such that the said signal processing module comprises a check module and a clock module each of which receives the request signal, the signal processing module also comprises an actuator module acting between the input module and the clock module, the clock module is connected to the output of the check module, and the actuator module is connected to the target module for transmitting the output signal of the signal processing module.
    Type: Grant
    Filed: June 2, 2006
    Date of Patent: September 21, 2010
    Assignee: ZF Friedrichshafen AG
    Inventors: Rainer Bürker, Mario Steinborn
  • Patent number: D625389
    Type: Grant
    Filed: October 20, 2009
    Date of Patent: October 12, 2010
    Assignee: Tour & Andersson AB
    Inventor: Per Norlander