Class / Patent application number | Description | Number of patent applications / Date published |
475084000 | Control of differential planetary gearing | 40 |
20080300082 | Power unit - A power unit enabling reduction of the size and manufacturing costs thereof and making unnecessary complicated control of power from a prime mover, for changing the speed of power from the prime mover. A first sun gear, a first carrier and a first ring gear of a first planetary gear unit are mechanically connected to drive wheels, the engine, and a pump impeller of a torque converter, respectively. A second sun gear, a second carrier and a second ring gear of a second planetary gear unit are mechanically connected to the engine, the drive wheels, and a turbine runner of the torque converter, respectively. A rotating machine is mechanically connected to one of the first and second ring gears, and the operation of the rotating machine is controlled by a PDU and an ECU. A battery is electrically connected to the rotating machine. | 12-04-2008 |
20110172045 | DRIVE SYSTEM FOR A MOTOR VEHICLE - A drive system for a motor vehicle with a continuously driven primary axle and a selectably driven secondary axle has a differential that acts between the wheels of the secondary axle, and has a torque transmission device for transmitting a drive torque to the differential. The torque transmission device has a clutch and a pump, wherein the pump produces a hydraulic pressure in a first pressure chamber of the clutch when a speed difference occurs between the primary axle and the secondary axle. The first pressure chamber is connected via a connecting line to a second pressure chamber, which is associated with an actuating member of the differential, so that the pressure produced by the pump also permits an at least partial locking of the differential. The first pressure chamber is connected to a low-pressure chamber through a first discharge line, in which is arranged a first control valve. The second pressure chamber is connected to the low-pressure chamber through a second discharge line, in which is arranged a second control valve. A pressure reduction member is located in the connecting line between the first pressure chamber and the second pressure chamber, in the first discharge line, or in the second discharge line. | 07-14-2011 |
20110269593 | Electro-Hydraulic Differential Lock - A differential locking device ( | 11-03-2011 |
20110275467 | DRIVE ASSEMBLY WITH HYDRAULIC ACTUATING MECHANISM - The disclosure relates to a drive assembly for a motor vehicle driven by a plurality of axles. The drive assembly comprises a differential unit, an externally controllable hang-on coupling, an externally controllable locking coupling, a first hydraulic actuating unit, and a second hydraulic actuating unit. The differential unit includes an input part which is rotatably drivable around an axis of rotation A, and two output parts which are drivingly connected to the input part. The two output parts have a differential effect relative to one another. The externally controllable hang-on coupling drivingly connects the differential unit and a driveshaft. The externally controllable locking coupling locks the differential movement between the two output parts of the differential assembly. The first hydraulic actuating unit actuates the hang-on coupling and the second hydraulic actuating unit actuates the locking coupling. The first hydraulic actuating unit, the hang-on coupling, the second hydraulic actuating unit and the locking coupling are arranged coaxially relative to the axis of rotation. | 11-10-2011 |
20120004064 | CONTROL DEVICE FOR POWER TRANSMISSION DEVICE - It is provided a control device for a power transmission device including a regenerative electric motor via a stepped shifting mechanism, wherein when a shift of the stepped shifting mechanism is performed in a regenerative state of the electric motor, the control device for a power transmission device increases an input shaft rotation speed of the stepped shifting mechanism through hydraulic control before a shift ending period, and, in the shift ending period, restrains an increase of the input shaft rotation speed through the hydraulic control and controls an input shaft rotation speed of the stepped shifting mechanism with the electric motor to be a target rotation speed after the shift. | 01-05-2012 |
20130137543 | CONTINUOUSLY VARIABLE TRANSMISSION AND A WORKING MACHINE - A continuously variable transmission has an input shaft and an output shaft. The transmission includes a variator unit having an input shaft and an output shaft, and a planetary gear wheel unit having a planet carrier, a first sun wheel and a second sun wheel. The input shaft of the transmission is rotationally connectable to the planet carrier and to the input shaft of the variator unit, and a shaft rotationally fixed to the first sun wheel is rotationally connectable to the output shaft of the variator unit. The planet carrier is provided with a first inner set of planet wheels for meshing engagement with the first sun wheel and a second outer set of planet wheels for meshing engagement with the second sun wheel. The first and second sets of planet wheels are in meshing engagement with each other, and a shaft rotationally fixed to the second sun wheel is rotationally connectable to the output shaft of the transmission via a first output member for obtaining a powersplit mode in Which power is transmitted via the second sun wheel. | 05-30-2013 |
20130288840 | INTEGRATED DRIVE GENERATOR HAVING A VARIABLE INPUT SPEED AND CONSTANT OUTPUT FREQUENCY AND METHOD OF DRIVING - An integrated drive generator having a variable input speed and constant output frequency, where the integrated drive generator includes a generator disposed about a first centerline. Also included is a hydraulic trimming device disposed about a second centerline. Further included is an epicyclic differential having a ring gear and a sun gear, wherein at least one of the ring gear and the sun gear drives the generator at a constant output frequency, wherein the epicyclic differential is disposed about a third centerline, wherein the third centerline corresponds to the second centerline. | 10-31-2013 |
20130296091 | VARIABLE SPEED DRIVE FOR AIRCARFT APPLICATIONS - A variable speed drive (AVSD) includes an input shaft connected to receive a mechanical input from an aircraft engine and an output shaft connected to provide a speed-controlled mechanical output. The AVSD includes a first power path having a fixed gear ratio, a second power path having a variable gear ratio, and a differential coupled to combine power received from the first power path and the second power path for provision to the output shaft. A controller modifies the variable gear ratio of the second power path to regulate the output shaft of the AVSD to a desired speed. | 11-07-2013 |
20150292611 | LOCKING DIFFERENTIAL - Locking differentials are described that include a first orientation and a second orientation. In the first orientation, the locking differential has a default unlocked position and must be actuated to be locked. In the second orientation, the locking differential has a default locked position and must be actuated to be unlocked. The user selects whether the locking differential is in the first orientation or the second orientation. | 10-15-2015 |
475086000 | By fluid operated mechanical clutch | 30 |
20080220923 | CONTROL SYSTEM FOR A DIFFERENTIAL IN A TRANSMISSION - 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. | 09-11-2008 |
20080287242 | Torque transfer device with hydrostatic torque control system - 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. | 11-20-2008 |
20100009798 | HYDRAULICALLY ACTUATED ELECTRONIC LIMITED SLIP DIFFERENTIAL FOR FRONT WHEEL DRIVE VEHICLES - A differential system for a front wheel drive vehicle. The differential system includes a differential carrier ( | 01-14-2010 |
20100210390 | Limited Slip Differential with Electrohydraulic Clutch Actuator - 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. | 08-19-2010 |
20110021301 | HYDRAULIC VEHICLE CLUTCH SYSTEM, DRIVETRAIN FOR A VEHICLE INCLUDING SAME, AND METHOD - 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. | 01-27-2011 |
20110065544 | ELECTROHYDRAULIC TORQUE TRANSFER DEVICE WITH INTEGRATED CLUTCH AND ACTUATOR UNIT - 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. | 03-17-2011 |
20110092329 | FREE FLOATING HYDRAULIC BULKHEAD WITH IMPROVED SEALING AND ANTI-ROTATION - 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. | 04-21-2011 |
20110152026 | HYDRAULICALLY SHIFTED TWO-SPEED ON-DEMAND TRANSFER CASE - 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. | 06-23-2011 |
20110319213 | ALL-WHEEL DRIVE WITH ACTIVE DRY DISCONNECT SYSTEM - 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. | 12-29-2011 |
20120015770 | Power Transfer Unit Drive Disconnect System - 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. | 01-19-2012 |
20130029797 | MULTIPLE PUMP CONFIGURATION FOR ELECTRONIC LIMITED SLIP DIFFERENTIAL AND TORQUE TRANSFER DEVICE - 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. | 01-31-2013 |
20130065720 | Effective Cooling System For Limited Slip Differential Assembly - 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. | 03-14-2013 |
20130178318 | MECHANISM FOR ACTUATING A POWER TRANSFER UNIT - 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. | 07-11-2013 |
20140256492 | METHOD AND DEVICE AT A VEHICLE DIFFERENTIAL BRAKE - In a driveline in a front wheel drive vehicle the distribution of drive torque to the drive wheels ( | 09-11-2014 |
20140274525 | Vehicle Differential Lock Disengagement Bypass - 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. | 09-18-2014 |
20140342866 | Disconnecting Axle Assembly - 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. | 11-20-2014 |
20150133252 | Method for Operating a Transmission Device - A method for operating a transmission device ( | 05-14-2015 |
20150330493 | DRIVELINE DISCONNECT WITH MODULAR REAR DRIVELINE MODULE (RDM) WITH INTEGRATED COUPLING AND DIFFERENTIAL CONTROL - A motor vehicle powertrain ( | 11-19-2015 |
20160010737 | VEHICLE DIFFERENTIAL LOCK DISENGAGEMENT BYPASS | 01-14-2016 |
20160084365 | DIFFERENTIAL HOUSING COVER AND ASSEMBLY - A cover for a differential housing is disclosed herein. The cover can include a body, a flange, a fluid reservoir, a first fluid conduit, and second fluid conduit. The body can have an inwardly-facing surface and outwardly-facing surface opposite the inwardly-facing surface. The flange can extend about at least a portion of a perimeter of the body. The fluid reservoir can be defined within the body and have a reservoir outlet and a return port. The first fluid conduit can be defined within the body. The first fluid conduit can be spaced from the fluid reservoir and extend between a first inlet and a first outlet. The second fluid conduit can be defined within the body and extend between the first fluid conduit and the return port of the fluid reservoir. | 03-24-2016 |
20160131240 | Vehicle Differential and Method of Operating the Same - 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. | 05-12-2016 |
20160153536 | ELECTRONIC LIMITED SLIP DIFFERENTIAL WITH SEPARATION OF CLUTCH AND ACTUATOR | 06-02-2016 |
20160178043 | LIMITED SLIP DIFFERENTIAL ASSEMBLY | 06-23-2016 |
20160186849 | DIFFERENTIAL GEAR FOR A DRIVE AXLE OF A MOTOR VEHICLE - The invention relates to a differential gear for a drive axle of a motor vehicle, having a driven differential case ( | 06-30-2016 |
20190143811 | HYDRAULIC CONTROL UNIT WITH DIFFERENTIAL CONNECTION | 05-16-2019 |
475087000 | Operated by viscous drag | 1 |
20120190493 | COUPLING DEVICE - A coupling device includes a clutch mechanism portion that is provided between a propeller shaft and a drive pinion shaft, and that engages by viscous resistance of hydraulic fluid. This coupling device is able to transmit driving force from a driving source to the drive pinion shaft by the engagement of this clutch mechanism portion. Also, an oil pump is provided that supplies hydraulic fluid not used for engaging the clutch mechanism portion to the clutch mechanism portion when the drive pinion shaft rotates. | 07-26-2012 |
475088000 | Operated by a pump responsive to differential action | 4 |
20090093333 | AXLE ASSEMBLY WITH ELECTRO-HYDRAULIC CLUTCH CONTROL SYSTEM - An axle assembly for a vehicle. The axle assembly includes an input shaft, a first and second output shaft, and a differential assembly. The axle assembly also includes a clutch assembly with an input member coupled to the differential assembly, an output member coupled to one of the first output shaft and the second output shaft, and a clutch member that selectively couples the input and output members. The axle assembly also includes a pump that supplies pressurized fluid to the clutch to control coupling of the input and output members. The axle assembly further includes a motor that drives the pump. The speed of the motor is controllable in order to change a fluid pressure supplied by the pump. The change in fluid pressure from the pump actuates the clutch member to thereby vary the torque between the first output shaft and the second output shaft. | 04-09-2009 |
20150111679 | LIMITED-SLIP DRIVELINE APPARATUS - The present disclosure relates to a limited-slip driveline apparatus including a first driveline component that is rotatable relative to a second driveline component. The driveline apparatus also includes a clutch configured to resist relative rotation between the first driveline component and the second driveline component at least when the clutch is actuated. The driveline apparatus further includes an actuation arrangement for actuating the clutch. The actuation arrangement includes a hydraulic pump that pumps hydraulic fluid through a hydraulic circuit when relative rotation exists between the first and second driveline components. The hydraulic pressure generated by the hydraulic pump within the hydraulic circuit is used to actuate the clutch. The actuation arrangement also includes a flow regulating valve for regulating a hydraulic fluid flow rate through the hydraulic circuit. The flow regulating valve is configured to prevent the hydraulic fluid flow rate from exceeding a set maximum flow rate regardless of a magnitude of the hydraulic pressure in the hydraulic circuit. | 04-23-2015 |
20150321552 | ALL-WHEEL DRIVE DISCONNECT WITH INDEPENDENT DRIVE - A disconnect mechanism ( | 11-12-2015 |
20160169359 | LIMITED-SLIP DRIVELINE APPARATUS | 06-16-2016 |
475089000 | Fluid resistance controls relative rotation of outputs | 1 |
20100056313 | LIMITED SLIP DIFFERENTIAL - A limited slip differential includes a driving plate, backing plates, differential gear assemblies, and a transmission assembly engaged together inside a sealed casing where fluid is pumped. The driving plate has pairs of communicated openings for interlocking two gears of each gear assembly, which extend by opposite directions from the driving plate for separately engaging with the transmission assembly. While synchronously rotating the plates, the gear assemblies are alternatively soaked into the fluid and each permits the fluid passing among the gears for adjusting the rotational speed. In the event that the rotational speed difference of axle shafts of the vehicle exceeds a threshold value, the LSD applies at least one gear assembly to generate a back pressure and efficiently block the fluid passing through the gears for limiting mutual rotational speed difference, hence achieving a limited-slip effect. | 03-04-2010 |