By Fluid Operated Mechanical Clutch Patents (Class 475/86)
  • Patent number: 10907714
    Abstract: A method of providing limited slip in a differential assembly includes interconnecting an axle and a differential assembly through a first slippable linkage. The axle is driven in rotation with a first housing of the differential assembly operable to be driven in rotation by a ring gear. A plurality of pinion gears of the differential assembly are positioned in the first housing and are driven in rotation by the first housing. A side gear is fixed to the axle and is meshed with at least some of the pinion gears. The axle is operable to slip relative to the first housing. The first housing, the plurality of pinion gears and the side gear are enclosed within a second housing. The axle extends from a first end positioned within both of the first housing and the second housing to a second end positioned outside of both of the first housing and the second housing.
    Type: Grant
    Filed: June 14, 2018
    Date of Patent: February 2, 2021
    Assignee: Eaton Corporation
    Inventors: Jeffrey A. Oesch, Matthew G. Fox
  • Patent number: 10768195
    Abstract: A wheel speed sensor system for determining the rotational speed of the wheels mounted at the opposite ends of an axle without requiring wheel speed sensor assemblies for each wheel shaft axle. As a result, the speed sensor system of the present disclosure can be housed in small sized or small capacity axle housing such as banjo type housings. In one embodiment, a wheel speed sensor assembly is positioned in the axle housing to determine the speed of one of the wheel axle shafts and a differential speed sensor assembly is positioned in the axle housing to determine the rotational speed of the differential. With these two speed measurements the rotational speed of the other wheel axle shaft can be calculated by a control unit. The wheel and differential speed sensor assemblies can each include a toothed or slotted ring or disk and sensor for sensing the teeth.
    Type: Grant
    Filed: August 15, 2017
    Date of Patent: September 8, 2020
    Assignee: DANA HEAVY VEHICLE SYSTEMS GROUP, LLC
    Inventor: Brian V. Knapke
  • Patent number: 10513146
    Abstract: An axle assembly having a countershaft. The countershaft may be disposed in an axle housing. An axle shaft may be disposed in the countershaft. A first clutch may control rotation of the countershaft with respect to the axle shaft. A second clutch may control rotation of the countershaft with respect to the axle housing.
    Type: Grant
    Filed: August 3, 2017
    Date of Patent: December 24, 2019
    Assignee: ArvinMeritor Technology, LLC
    Inventors: Dale Eschenburg, Adam P. Sadlik
  • Patent number: 9751403
    Abstract: A differential assembly for a vehicle includes a drive train for transferring motive power from an engine drive member to the right and left drive shafts which are coupled, respectively, to ground engaging members of the vehicle. The drive train includes a rotating element operatively engaged to the drive member and to the right and left drive shafts. The differential assembly further includes a first speed sensor is arranged to measure rotational speed of (i) the rotating element or (ii) one of the right and left drive shafts, and a second speed sensor arranged to measure rotational speed of one of the right and left drive shafts. The second speed sensor arranged to measure rotational speed of the other of the right and left drive shafts when the first speed sensor is arranged to measure rotational speed of one of the right and left drive shafts.
    Type: Grant
    Filed: August 12, 2015
    Date of Patent: September 5, 2017
    Assignee: Honda Motor Co., Ltd.
    Inventors: Keith B. Steidl, Dustin Schroeder, Masahiro Yamaguchi
  • Patent number: 9644726
    Abstract: A differential and method of operating the differential is described. The differential has side gears and at least one pinion gear in mesh with the side gears. One of the side gears is provided with dog clutch teeth and an axially extending ring carrying clutch plates. A clutch housing has an axially extending ring carrying clutch plates interleaved with the side gear clutch plates. A dog clutch ring is connected to the clutch housing and selectively engages with the side gear dog clutch teeth. The above-described system permits an axle system of a tandem axle system to be selectively engaged and disengaged.
    Type: Grant
    Filed: November 11, 2014
    Date of Patent: May 9, 2017
    Assignee: Dana Heavy Vehicle Systems Group, LLC
    Inventor: Kenneth E. Cooper
  • Patent number: 9573457
    Abstract: A hybrid powertrain unit comprises an engine and a gearbox with a primary shaft connectable to an engine shaft via a clutch and a secondary shaft with an output pinion meshing with a first differential crown wheel. An electric machine is configured to function as an electric motor and generator, having a shaft connected by a transmission to a second differential crown wheel. The transmission, arranged between the electric machine shaft and the second crown wheel includes a first engagement device. The electric machine shaft is connected to the engine shaft by a belt transmission including a belt engaged on a first pulley connected to the electric machine shaft and a second pulley connected to the engine shaft. Between the electric machine shaft and said first pulley is a second engagement device. The engagement devices are arranged coaxially with the electric machine shaft on opposite sides of the electric machine.
    Type: Grant
    Filed: May 18, 2015
    Date of Patent: February 21, 2017
    Assignee: C.R.F. Società Consortile per Azioni
    Inventors: Andrea Piazza, Marco Garabello, Gianluigi Pregnolato, Fabio Pesola
  • Patent number: 9303749
    Abstract: A power switching device includes a power transmission unit and a driving unit. The transmission unit includes a differential, an axle aligned with the differential, and a coupler sleeved movably on one of the differential and the axle. The driving unit includes a controller, a first transmission mechanism driven by the controller, and a second transmission mechanism driven by the first transmission mechanism. The controller is a solenoid or an electric actuator, and is operable to activate the second transmission mechanism. The coupler can be moved by the second transmission mechanism to interconnect the differential and the axle, so as to allow for co-rotation of the axle with the differential.
    Type: Grant
    Filed: November 7, 2014
    Date of Patent: April 5, 2016
    Assignee: KWANG YANG MOTOR CO., LTD.
    Inventors: Chi-Han Chang, Chao-Chang Ho
  • Patent number: 9079495
    Abstract: A disconnectable all-wheel drive system for motor vehicles having a multi-speed power take-off unit and a multi-speed rear drive module.
    Type: Grant
    Filed: June 13, 2013
    Date of Patent: July 14, 2015
    Assignee: American Axle & Manufacturing, Inc.
    Inventors: Paul J. Valente, James P. Downs
  • Patent number: 9074672
    Abstract: A rear drive module for an all-wheel drive vehicle. The rear drive module includes a disconnect clutch, a differential assembly and a hollow shaft. The disconnect clutch has a first clutch member, which is coupled to the spool for rotation therewith, and a second clutch member. The differential assembly includes a differential case. The hollow shaft is coupled to the differential case for rotation therewith and is configured to transmit rotary power in a power path between the disconnect clutch and the differential assembly.
    Type: Grant
    Filed: April 3, 2014
    Date of Patent: July 7, 2015
    Assignee: American Axle & Manufacturing, Inc.
    Inventors: James P. Downs, Paul J. Valente
  • Publication number: 20150133252
    Abstract: A method for operating a transmission device (1), which is transferable into different operating states through the actuation of shifting elements (A to F), is described. At least one of the shifting elements (A, F) is designed as a positive-locking shifting element, which is supplied with operating pressure (p_sys) for presenting a defined operating state of the transmission device (1). Through a sensor device upstream of a valve device, which is connected to a transmission area essentially featuring ambient pressure, a value of a pressure signal corresponding to the operating pressure can be determined. Upon exceeding a threshold value of the pressure signal, currently in the area of the positive-locking shifting element (A, F), a change in operating state is determined, and, upon falling short of an additional threshold value of the pressure signal, the reaching of the requested operating state is established.
    Type: Application
    Filed: November 11, 2014
    Publication date: May 14, 2015
    Inventors: Georg Mihatsch, Patrick Riedel
  • Patent number: 8951155
    Abstract: A differential gear mechanism can include a differential casing, a piston and an externally mounted plenum assembly. The differential casing can have a differential gear set configured to selectively rotate a first axle shaft and a second axle shaft. The piston can be slidably disposed in the differential casing and configured to actuate a clutch assembly. The externally mounted plenum assembly can include a plenum assembly housing, a hydraulic coupling and a motor mounted on the plenum assembly housing. The plenum assembly housing can define an axle opening configured to receive one of the first and second axle shafts therethrough. The hydraulic coupling can be arranged on the plenum assembly housing at the axle opening. The motor can be configured to pump hydraulic fluid from the externally mounted plenum assembly, through the hydraulic coupling and into the differential casing to act onto the piston.
    Type: Grant
    Filed: October 9, 2013
    Date of Patent: February 10, 2015
    Assignee: Eaton Corporation
    Inventor: Matthew G. Fox
  • Publication number: 20140342866
    Abstract: An axle assembly having an axle housing assembly having a carrier housing and first and second end caps that are mounted to the carrier housing. The first end cap cooperates with the carrier housing to define a differential cavity for receipt of a differential assembly, while the second end cap cooperates with the carrier housing to define a clutch cavity for receipt of a clutch. A spindle drivingly couples a first output of the differential with an input of the clutch member. A first output member is coupled for rotation with a second output of the differential and a second output member is coupled for rotation with an output of the clutch. The spindle is received through a tubular portion of carrier housing.
    Type: Application
    Filed: July 31, 2014
    Publication date: November 20, 2014
    Inventors: Paul J. Valente, James P. Downs
  • Publication number: 20140274525
    Abstract: A method and system for bypassing a control valve that would otherwise disengage differential and/or inter-axle locking means. The bypass is achieved by a valve that can be actuated by a vehicle condition change.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: BRANDT ROAD RAIL CORPORATION
    Inventor: Josh Dumalski
  • Publication number: 20140256492
    Abstract: In a driveline in a front wheel drive vehicle the distribution of drive torque to the drive wheels (1) via a differential (6) is controlled by means of a differential brake with a hydraulically controlled limited slip clutch (7). A low preparatory hydraulic pressure is applied to the clutch at the occurrence of any one of certain predetermined driving situations for decreasing the response time for the clutch.
    Type: Application
    Filed: October 25, 2012
    Publication date: September 11, 2014
    Inventor: Niklas Westerlund
  • Patent number: 8758182
    Abstract: A hydraulic bulkhead configured for use with a limited slip differential includes a plenum comprising a passageway for hydraulic fluid and a boss. A first seal is located on an outer surface of the boss. The outer surface of the boss is a low pressure area relative to the inner surface of the boss. The plenum is stationary relative to the limited slip differential. A differential assembly including the inventive hydraulic bulkhead is also disclosed.
    Type: Grant
    Filed: October 5, 2010
    Date of Patent: June 24, 2014
    Assignee: Eaton Corporation
    Inventor: Matthew George Fox
  • Patent number: 8694224
    Abstract: A control system or method for a vehicle references a camera and sensors to determine when an offset of a yaw rate sensor may be updated. The sensors may include a longitudinal accelerometer, a transmission sensor, a vehicle speed sensor, and a steering angle sensor. The offset of the yaw rate sensor may be updated when the vehicle is determined to be stationary by referencing at least a derivative of an acceleration from the longitudinal accelerometer. The offset of the yaw rate sensor may be updated when the vehicle is determined to be moving straight by referencing at least image data captured by the camera. Lane delimiters may be detected in the captured image data and evaluated to determine a level of confidence in the straight movement. When the offset of the yaw rate sensor is to be updated, a ratio of new offset to old offset may be used.
    Type: Grant
    Filed: February 28, 2013
    Date of Patent: April 8, 2014
    Assignee: Magna Electronics Inc.
    Inventors: William J. Chundrlik, Jr., Nathaniel Johnson, Marc Wimmershoff
  • Patent number: 8591364
    Abstract: A transmission system is provided having an input member, an output member, four planetary gear sets, a plurality of coupling members a plurality of torque transmitting devices, a launch clutch, and a hydraulic circuit. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices may include clutches and brakes.
    Type: Grant
    Filed: December 13, 2011
    Date of Patent: November 26, 2013
    Assignee: GM Global Technology Operations LLC
    Inventor: James M. Hart
  • Patent number: 8554441
    Abstract: A traction control system and methodology that utilize a phase-out and phase-in of maximum drive torque and/or a regenerative brake torque based on vehicle speed and road slope.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: October 8, 2013
    Assignee: e-AAM Driveline Systems AB
    Inventors: Martin Johansson, Matilda Hallnor
  • Patent number: 8538642
    Abstract: A range determination apparatus for preventing a shift range from being undefined during speed change states of an automatic transmission with no manual valve. The range determination apparatus includes a gear speed change mechanism and a plurality of friction engagement elements operative to have respective operation states changed between an engagement and a disengagement state. The range determination apparatus is used for automatic transmissions subject to speed changes via a torque transmission path of the gear speed change mechanism changed by the operation states of the friction engagement elements. A real shift range determination is carried out on the basis of the operation states of the friction engagement elements, where a T-ECU is operative to determine a current shift range based on detection results obtained by oil pressure sensors and operation patterns preliminarily memorized when the operation states of the friction engagement elements are not being changed.
    Type: Grant
    Filed: September 4, 2009
    Date of Patent: September 17, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Naoki Itazu, Yoshinobu Nozaki
  • Publication number: 20130178318
    Abstract: A drive system includes a differential for transmitting power between a power source and first axles; a clutch including a first member driveably connected to the power source and a second member secured to a power transfer shaft; and a servo including a cylinder connected to a pressure source, a piston displaceable in the cylinder for mutually disconnecting the first and second members and allowing mutual engagement of the first and second members.
    Type: Application
    Filed: February 28, 2013
    Publication date: July 11, 2013
    Applicant: FORD GLOBAL TECHNOLOGIES, LLC
    Inventor: FORD GLOBAL TECHNOLOGIES, LLC
  • Patent number: 8457847
    Abstract: A powertrain includes a transmission coupled to a driveline. A method for monitoring torque of the driveline includes monitoring signals from first and second rotational sensors located at respective first and second rotationally-coupled positions of the driveline separated by a distance along the driveline, determining rotation of the driveline at the first and second rotationally-coupled positions from said signals, determining a twist angle derived from a difference between the rotations of the driveline at the first and second rotationally-coupled positions, calculating a driveline torque corresponding to the twist angle, and controlling operation of the powertrain in response to the driveline torque.
    Type: Grant
    Filed: September 28, 2010
    Date of Patent: June 4, 2013
    Assignee: GM Global Technology Operations LLC
    Inventors: Dongxu Li, Kumaraswamy V. Hebbale, Chunhao I. Lee, Farzad Samie, Chi-Kuan Kao, Ming Cao
  • Publication number: 20130065720
    Abstract: A differential axle assembly for a work machine having a differential lock capability. The differential axle has a differential gear housing, which utilizes a sealed housing on the outside thereof and a bleed flow path for pressurized liquid lubricant actuating a differential lock feature to provide adequate cooling flow for the differential gear set and differential lock mechanism under heavy duty circumstances.
    Type: Application
    Filed: September 9, 2011
    Publication date: March 14, 2013
    Inventors: Robert L. Wood, JR., Michael J. Cliff, Craig R. Eike
  • Patent number: 8376887
    Abstract: A drive system includes a rotating power source, a planetary differential including a ring gear engaged with the power source, a sun gear secured to a first shaft and a carrier secured to a second shaft, a member secured to an output shaft, and a coupler alternately connecting and disconnecting the member and the ring gear.
    Type: Grant
    Filed: July 19, 2010
    Date of Patent: February 19, 2013
    Assignee: Ford Global Technologies, LLC
    Inventors: Andreas E. Perakes, Matthew D. Hammond, Laurence A. Deutsch, Steven A. Frait
  • Publication number: 20130029797
    Abstract: A hydraulic system for a vehicle drivetrain includes a torque transfer device having a first actuator that actuates to selectively communicate rotatable motion from an input member to an output member. A limited slip differential selectively transfers drive torque from the output member to at least one of the first and second axle shafts. A motor drives a first and a second output shaft. A first pump is rotatably driven by the first output shaft. The first pump selectively supplies the hydraulic fluid to the first actuator. A second pump is rotatably driven by the second output shaft. The second pump selectively supplies the hydraulic fluid to the second actuator.
    Type: Application
    Filed: July 29, 2011
    Publication date: January 31, 2013
    Applicant: AMERICAN AXLE & MANUFACTURING, INC.
    Inventors: Paul J. Valente, John C. Hibbler, Charles G. Stuart
  • Patent number: 8352141
    Abstract: A method for actuating a clutch in the drive train of a motor vehicle, including: generating a respective position setpoint for each predetermined target interval to actuate the clutch; in each predetermined target interval, actuating the clutch in a plurality of predetermined controller sampling intervals; discretizing a respective position setpoint change into a plurality of intermediate position setpoints; determining a number of intermediate position setpoints in the plurality of intermediate position setpoint depending on the ratio of the target interval to the controller sampling interval; and specifying the respective position setpoint changes in steps to actuate the clutch.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: January 8, 2013
    Assignee: Schaeffler Technologies AG & Co., KG
    Inventor: Michael Schuhen
  • Patent number: 8239108
    Abstract: A method for operating a vehicle drive train comprising a drive unit, a transmission, and an all-wheel splitter having a clutch. The all-wheel splitter is positioned between the transmission and the output and splits a transmission output torque to vary the torque distribution to driven axles of the output. The split of the output torque to the driven axles is performed by a control unit in such a way that the transmission output torque, less a predetermined nominal torque set by the all-wheel drive strategy, is transferred to a first axle while the nominal torque is transferred to a second axle. When defined operating conditions are met, a clutch monitoring function is activated and the nominal torque is replaced by a torque definition of the clutch monitoring function so that the torque which is transferred by clutch to the second driven axle, is increased, then kept constant, and thereafter reduced.
    Type: Grant
    Filed: October 30, 2009
    Date of Patent: August 7, 2012
    Assignee: ZF Friedrichshafen AG
    Inventors: Wilfrid Eberhard, Gerhard Hermann Martin
  • Patent number: 8219308
    Abstract: An engine-propelled monowheel vehicle comprises two wheels, close together, that circumscribe the remainder of the vehicle. When the vehicle is moving forward, the closely spaced wheels act as a single wheel, and the vehicle turns by leaning the wheels. A single propulsion system provides a drive torque that is shared by the two wheels. A separate steering torque, provided by a steering motor, is added to one wheel while being subtracted from the other wheel, enabling the wheels to rotate in opposite directions for turning the vehicle at zero forward velocity. The vehicle employs attitude sensors, for sensing roll, pitch, and yaw, and an automatic balancing system. A flywheel in the vehicle spins at a high rate around a spin axis, wherein the spin axis is rotatable with respect to the vehicle's frame. The axis angle and flywheel spin speed are continually adjustable to generate torques for automatic balancing.
    Type: Grant
    Filed: February 2, 2010
    Date of Patent: July 10, 2012
    Inventor: Karl F. Leeser
  • Patent number: 8214117
    Abstract: A driving force controlling apparatus includes a driving force controller configured to determine a state of a road surface. A driving force controller is configured to control a driving force of a vehicle based on the road surface state. A rear-wheel speed sensor is configured to detect a rear-wheel speed. A low-friction-coefficient road surface determining device is configured to determine whether the road surface is a low-friction-coefficient road surface using the rear-wheel speed on a predetermined condition. A determination prohibition device is configured to prohibit the low-friction-coefficient road surface determining device from determining whether the road surface is a low-friction-coefficient road surface, if (a) the rear-wheel speed sensor is abnormal, or if (b) a predetermined time has elapsed from when a shift range is changed from a reverse range to a drive range and/or (c) a gear position has become greater than or equal to a predetermined gear position.
    Type: Grant
    Filed: July 26, 2010
    Date of Patent: July 3, 2012
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yutaka Ishikawa, Makoto Kobayashi, Takahito Fujita
  • Publication number: 20120029779
    Abstract: A vehicle drivetrain can include various structures, such as a multi-ratio transmission, a two-speed final drive assembly connected in series with the multi-ratio transmission and including a low speed final drive ratio and a high speed final drive ratio, a pair of front driveshafts driven by the two-speed final drive assembly, a pair of rear driveshafts, a rear differential assembly connected to the two-speed final drive assembly, and a control assembly including. The control assembly can include a controller in electrical communication with portions of the rear differential assembly, such as a variable displacement pump and purge valve. An input array can be in electrical communication with the controller and can include a plurality of sensors, and at least one switch accessible to an operator of the vehicle. Various related methods can also be executed for control and operation of such a drivetrain.
    Type: Application
    Filed: July 30, 2010
    Publication date: February 2, 2012
    Inventors: MICHAEL THOMAS DICKINSON, ANDREW J. FOX
  • Publication number: 20120015770
    Abstract: A drive system includes a rotating power source, a planetary differential including a ring gear engaged with the power source, a sun gear secured to a first shaft and a carrier secured to a second shaft, a member secured to an output shaft, and a coupler alternately connecting and disconnecting the member and the ring gear.
    Type: Application
    Filed: July 19, 2010
    Publication date: January 19, 2012
    Applicant: Ford Global Technologies, LLC
    Inventors: Andreas E. Perakes, Matthew D. Hammond, Laurence A. Deutsch, Steven A. Frait
  • Publication number: 20110319213
    Abstract: A vehicle drive train for transferring torque to first and second sets of wheels includes a first driveline adapted to transfer torque to the first set of wheels and a first power disconnection device. A second driveline is adapted to transfer torque to the second set of wheels and includes a second power disconnection device. A hypoid gearset is positioned within one of the first driveline and the second driveline in a power path between the first and second power disconnection devices. The hypoid gearset is selectively disconnected from being driven by the first driveline and the second driveline when the first and second power disconnection devices are operated in a disconnected, non-torque transferring, mode. At least one of the first and second power disconnection devices includes an active dry friction clutch.
    Type: Application
    Filed: March 9, 2010
    Publication date: December 29, 2011
    Applicant: Magna Powertrain of America, Inc.
    Inventors: Todd Ekonen, Johannes Quehenberger
  • Publication number: 20110152026
    Abstract: A transfer case includes an input shaft, first and second output shafts, and a planetary gearset including a sun gear, a ring gear and planet gears rotatably supported on a carrier coupled to the first output shaft. A collar is driven by the sun gear and selectively drives the carrier. The ring gear is moveable between first and second positions. The collar is coupled to the ring gear for movement therewith between first and second positions. The collar is operable in its first position to couple the sun gear to the carrier and operable in its second position to be released from engagement with the carrier. The ring gear is operable in its first position to be released from coupled engagement with a stationary member and operable in its second position to be coupled to the stationary member. A mechanism moves the ring gear between its first and second positions.
    Type: Application
    Filed: December 17, 2008
    Publication date: June 23, 2011
    Inventor: Randolph C. Williams
  • Publication number: 20110092329
    Abstract: A hydraulic bulkhead configured for use with a limited slip differential includes a plenum comprising a passageway for hydraulic fluid and a boss. A first seal is located on an outer surface of the boss. The outer surface of the boss is a low pressure area relative to the inner surface of the boss. The plenum is stationary relative to the limited slip differential. A differential assembly including the inventive hydraulic bulkhead is also disclosed.
    Type: Application
    Filed: October 5, 2010
    Publication date: April 21, 2011
    Applicant: Eaton Corporation
    Inventor: Matthew George Fox
  • Publication number: 20110087409
    Abstract: A torque vectoring device directs different torques at will to the two wheels of a drive axle on a road vehicle. It has two hydraulically controlled disc clutches, connected to a drive shaft, extending through the device, and in engaged condition intended for connecting the drive shaft to either of two gear sleeves, each in splines engagement with an eccentric tube eccentrically journaled in relation to the drive shaft, and a torque transmitting mechanism with a gear ratio of 1:1 between the eccentric tube and a differential case sleeve, coaxial with the drive shaft and forming part of a differential case of a differential on the drive axle, to which differential the torque vectoring device is connected.
    Type: Application
    Filed: October 14, 2010
    Publication date: April 14, 2011
    Inventors: Lars Severinsson, Ola Nicklasson
  • Publication number: 20110065544
    Abstract: A power transmission device includes a housing, a rotatable input member and a rotatable output member supported in the housing by a pair of bearings. A friction clutch is operable to selectively transmit a requested magnitude of torque between the input member and the output member. The clutch is axially positioned between the bearings. An actuator is operable to provide an actuation force to the friction clutch to generate the requested magnitude of torque.
    Type: Application
    Filed: November 17, 2010
    Publication date: March 17, 2011
    Applicant: American Axle & Manufacturing, Inc.
    Inventor: Stuart J. Millar
  • Publication number: 20110021301
    Abstract: A hydraulic system for a vehicle clutch assembly can include an on-demand variable displacement pump and a purge valve for regulating hydraulic pressure supplied to the clutch(es). The hydraulic pressure at the pump can have multiple displacement settings to compensate for variable changes in clutch pressure requirements. The purge valve can be configured to purge hydraulic pressure from the hydraulic system so that an optimum, controllable, and/or pre-determined operating pressure can be supplied to the clutch(es). The system can be configured to provide accurate control of clutch(es) when a drivetrain is being automatically controlled to switch between a low gear ratio and a high gear ratio.
    Type: Application
    Filed: July 30, 2010
    Publication date: January 27, 2011
    Inventors: Tetsushi Asano, Bobbie Burke, Andrew J. Fox
  • Publication number: 20100210390
    Abstract: A power transfer device for a front wheel drive motor vehicle includes an input shaft driven by a power source, a second shaft driven by the first shaft through one of a plurality of speed gearsets, an output gearset driven by the second shaft and a differential assembly. The differential assembly includes an electronically controlled, hydraulically actuated, clutch operable to place the differential assembly in one of an open mode, a locked mode and a limited slip mode. A clutch actuator includes an electric motor coupled to a pump where the pump provides pressurized fluid to the clutch to operate the clutch in one of the locked and limited slip modes.
    Type: Application
    Filed: August 8, 2007
    Publication date: August 19, 2010
    Inventors: Todd Ekonen, Christopher Noullet
  • Publication number: 20100009798
    Abstract: A differential system for a front wheel drive vehicle. The differential system includes a differential carrier (24), an actuator housing {44), an intermediate shaft (32), a clutch pack (42), and a piston (40). The differential carrier (24) houses a differential assembly (16) configured to drive a right and left axle shaft. The actuator housing (44) is configured to rotate in conjunction with the differential carrier (24). The intermediate shaft (32) extends through the actuator housing (44). The clutch pack (42) has a first set of clutch plates (46) that engage the actuator housing (44} and a second set of clutch plates (48) that engage the intermediate shaft (32). The piston (40) compresses the first and second set of clutch plates {46, 48) thereby frictionaiiy coupling the differential carrier (24) to the intermediate shaft (32) and thus locking or modulating the differential.
    Type: Application
    Filed: July 6, 2007
    Publication date: January 14, 2010
    Applicant: BORGWARNER INC.
    Inventors: Robert Keller, Eric C. Sandstrom
  • Patent number: 7641585
    Abstract: A rear-drive vehicle having a self-locking differential; a regulating device for regulating the lock percentage of the differential; a number of sensors for real-time detecting dynamic parameters of the vehicle; and a central control unit for controlling the regulating device to regulate the lock percentage of the differential as a function of the dynamic parameters of the vehicle.
    Type: Grant
    Filed: April 2, 2004
    Date of Patent: January 5, 2010
    Assignee: Ferrari S.p.A.
    Inventor: Franck Baldet
  • Patent number: 7524260
    Abstract: An air actuated shift mechanism is housed within a drive axle housing and can be used to actuate a two-speed shifter, or it can be used to actuate a differential locking mechanism. The air actuated shift mechanism includes a lock member and an engageable member that is selectively engaged by the lock member. When the lock member and engageable member are in an engaged position, a first axle function is provided such as a low speed or a locked differential condition. When the lock member and the engageable member are in a disengaged position, a second axle function is provided such as a high speed or an unlocked differential condition. A shift member moves one of the lock member and the engageable member to provide the engaged position, and an air actuated piston controls movement of the shift member.
    Type: Grant
    Filed: June 14, 2006
    Date of Patent: April 28, 2009
    Assignee: ArvinMeritor Technology, LLC
    Inventors: Egidio Miguel Gomes Correia, Jose Gumercindo Furtado, Juscelino Dos Reis, Jose Francivaldo Pereira Lemos, Fernando Gregorato Martinez, Jose Renan da Silva
  • Patent number: 7458911
    Abstract: A drive system designed to use a vehicle's existing hydraulic system to operate a controllable limited slip differential assembly. The limited slip differential assembly may be associated with the front axle, the rear axle, or the driveline between the front and rear axles. The differential assembly may also be used in combination that includes front, rear, or intermediate differential assemblies. The drive system further includes a friction clutch assembly for selectively engaging and disengaging an input member with an output member of the differential assembly, a fluid clutch actuator for selectively frictionally and variably loading the clutch assembly, and a fluid pump that is a common source of pressurized fluid for the fluid clutch actuator and the existing hydraulic system of the motor vehicle other than the fluid clutch actuator of the drive system. The fluid clutch actuator is actuated by fluid pressure generated by the fluid pump.
    Type: Grant
    Filed: July 22, 2005
    Date of Patent: December 2, 2008
    Assignee: Dana Automotive Systems Group, LLC
    Inventors: James A. Krisher, Kenneth E. Cooper, Thomas L. Nahrwold, Gordon W. Hunt, Ralph W. Baxter, Jr., Randy Sommer
  • Publication number: 20080287242
    Abstract: A power transmission device includes a rotatable input shaft, a rotatable output shaft and a ring gear fixed for rotation with the input shaft. A carrier is fixed for rotation with the output shaft. A pump assembly includes an inner rotor supported for rotation on the carrier and an outer rotor encompassing the inner rotor. The outer rotor is in driving meshed engagement with the ring gear. The pump provides pressurized fluid to one of first and second fluid ports. A flow restrictor is moveable to selectively restrict fluid flow relative to one of the first and second ports.
    Type: Application
    Filed: May 17, 2007
    Publication date: November 20, 2008
    Inventors: Russell T. Capito, Curt D. Gilmore
  • Publication number: 20080220923
    Abstract: A control system for controlling an axle clutch between two half-axles in a motor vehicle is provided. The control system includes two solenoids and a pressure sensor in communication with a controller and a valve assembly. One of the solenoids provides a flow of fluid to engage the axle clutch. The valve assembly cooperates with another of the solenoids to disengage the axle clutch under certain conditions.
    Type: Application
    Filed: December 5, 2007
    Publication date: September 11, 2008
    Inventors: Brian W. Whitmarsh, Todd W. Rooney, Mark A. Vernacchia, Joshua E. Lehrmann, Wayne B. Vogel
  • Patent number: 7278943
    Abstract: A torque transfer mechanism having a multi-plate friction clutch connecting a pair of rotary members and an electrohydraulic clutch actuator for controlling engagement of the friction clutch. The clutch actuator includes a hydraulic pump, a hydraulically-actuated rotary operator, and a ball ramp mechanism. The hydraulic pump draws low pressure fluid from a sump and delivers high pressure fluid to a series of actuation chambers defined between coaxially aligned first and second components of the rotary operator. The magnitude of the fluid pressure delivered to the actuation chamber controls angular movement of the second component relative to the first component for energizing the ball ramp mechanism. The ball ramp mechanism applies a clutch engagement force on the friction clutch assembly, thereby transferring drive torque from the first rotary member to the second rotary member. A hydraulic control system adaptively regulates the fluid pressure delivered to the actuation chamber.
    Type: Grant
    Filed: November 15, 2005
    Date of Patent: October 9, 2007
    Assignee: Magna Powertrain USA, Inc.
    Inventor: Dumitru Puiu
  • Patent number: 7211017
    Abstract: An improved inter-axle differential locking clutch is provided that aligns the actuator and the clutch member thereby reducing space and material requirements in the axle assembly housing. The clutch also eliminates the need for a pushrod and shift fork thereby reducing tooling and production costs, as well as eliminating issues associated with misalignment of the piston and pushrod, relative rotation of the shift fork and clutch member, and tipping of the shift fork. The clutch includes one or more pistons disposed within either the axle housing or a carrier supporting the input shaft bearing. Fluid pressure actuates the pistons against a clutch member causing selective engagement between the clutch member and either a side gear driven by the inter-axle differential or a differential case housing the differential gears of the inter-axle differential.
    Type: Grant
    Filed: April 30, 2004
    Date of Patent: May 1, 2007
    Assignee: Dana Corporation
    Inventors: Michael Green, Chris Pollack, Gary A. Turner, Leo Wenstrup, James F. Ziech
  • Patent number: 7134980
    Abstract: An integrated control system for a motor vehicle including at least one drive axle having left and right axle shafts each provided with a wheel mounted thereon. The integrated control system comprises a vehicle torque control system, a vehicle body roll control system, and a common source of a fluid pressure provided to operate both the vehicle body roll control system and the vehicle torque control system. The vehicle torque control system includes at least one fluid actuated clutch provided to regulate a drive torque distribution between the wheels of the motor vehicle in order to improve traction of the motor vehicle on a drive surface. The vehicle body roll control system includes at least one force device provided to tilt a vehicle body relative to a vehicle chassis so as to counteract a rollover-inducing force.
    Type: Grant
    Filed: August 8, 2005
    Date of Patent: November 14, 2006
    Assignee: Torque-Traction Technologies, LLC.
    Inventor: William J. Kroppe
  • Patent number: 7004870
    Abstract: An integrated control system for a motor vehicle including at least one drive axle having left and right axle shafts each provided with a wheel mounted thereon. The integrated control system comprises a vehicle torque control system, a vehicle body roll control system, and a common source of a fluid pressure provided to operate both the vehicle body roll control system and the vehicle torque control system. The vehicle torque control system includes at least one fluid actuated clutch provided to regulate a drive torque distribution between the wheels of the motor vehicle in order to improve traction of the motor vehicle on a drive surface. The vehicle body roll control system includes at least one force device provided to tilt a vehicle body relative to a vehicle chassis so as to counteract a rollover-inducing force.
    Type: Grant
    Filed: February 25, 2004
    Date of Patent: February 28, 2006
    Assignee: Dana Corporation
    Inventor: William J. Kroppe
  • Patent number: 6991572
    Abstract: A drive axle assembly (10) includes a carrier (24) for supporting a differential case (22) with axle shafts (14, 16) extending therethrough and rotatable with the differential case (22) relative to the carrier (24). A plurality of friction discs (74, 76) are disposed within the differential case (22) and are alternatively connected to the differential case (22) and a drive hub (78), which is connected to one of the axle shafts (14). A sleeve (100) is operably connected to a piston (90) for generating a thrust force and for transmitting the thrust force through the sleeve (100) to move the friction discs (74, 76) closer together. A plurality of levers (104) are operably connected one with the other and disposed between the sleeve (100) and the friction discs (74, 76) to amplify the thrust force of the sleeve (100).
    Type: Grant
    Filed: February 4, 2004
    Date of Patent: January 31, 2006
    Assignee: AxleTech International IP Holdings, LLC
    Inventor: I-Chao Chung
  • Patent number: 6966396
    Abstract: A drive axle assembly for an all-wheel drive vehicle includes an adaptively controlled first hydraulic coupling for providing front-to-rear torque transfer control to a first wheel and an adaptively controlled second hydraulic coupling for providing front-to-rear torque control to a second wheel. The drive axle assembly is contained with a common housing and communicates with a traction control system to actively control actuation of the first and second hydraulic couplings based on the operating characteristics of the vehicle as detected by suitable sensors.
    Type: Grant
    Filed: March 7, 2005
    Date of Patent: November 22, 2005
    Assignee: Magna Drivetrain of America, Inc.
    Inventors: John R. Forsyth, Fred C. Porter
  • Patent number: 6942055
    Abstract: A drive axle assembly for an all-wheel drive vehicle includes an adaptively controlled first hydraulic coupling for providing front-to-rear torque transfer control to a first wheel and an adaptively controlled second hydraulic coupling for providing front-to-rear torque control to a second wheel. The drive axle assembly is contained with a common housing and communicates with a traction control system to actively control actuation of the first and second hydraulic couplings based on the operating characteristics of the vehicle as detected by suitable sensors.
    Type: Grant
    Filed: November 3, 2003
    Date of Patent: September 13, 2005
    Assignee: Magna Drivetrain of America, Inc.
    Inventors: John R. Forsyth, Fred C. Porter