| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 192480601 | Having fluid pressure operator | 63 |
| 20110088989 | DUAL CLUTCH WITH TORSIONAL VIBRATION DAMPER - A dual wet clutch in a closed housing. A damper is arranged in the power flow from the housing to the input parts of the wet clutches. The input parts are connected to one another substantially without play. Furthermore, a centrifugal force pendulum is arranged on at least one input part. The arrangement has a particularly short axial structural length. | 04-21-2011 |
| 20110114436 | DUAL CLUTCH - A dual clutch which has two friction clutches, which have a central pressure-exerting plate and two pressure plates which are axially movable relative to the pressure-exerting plate with the interposition of the friction linings of two clutch disks, which each mesh with a gearbox input shaft of actuating devices. The pressure plates are acted on by transmission elements by the actuating devices directly without a lever action. Furthermore, for the cooling and lubrication of the actuating bearings between the actuating devices and the transmission elements, an annular chamber can be formed which has an increased fluid volume. | 05-19-2011 |
| 20110114437 | DOUBLE CLUTCH - A double clutch which has two friction clutches, a central pressure-exerting plate and two pressure plates that are axially movable relative to the pressure-exerting plate with the interposition of friction linings of two clutch disks, which mesh with each transmission input shaft, of actuating devices. Here, the pressure plates are acted on by transmission elements by the actuating devices directly without a lever action. Furthermore, for cooling and lubrication of actuating devices and transmission elements, an annular chamber with an increase in fluid volume can be formed. | 05-19-2011 |
| 20110132711 | CONTROL SYSTEM FOR A DUAL CLUTCH TRANSMISSION - A hydraulic control system for a dual clutch transmission includes a plurality of pressure and flow control devices in fluid communication with a plurality of clutch actuators and with a plurality of synchronizer actuators. The clutch actuators are operable to actuate a plurality of torque transmitting devices and the synchronizer actuators are operable to actuate a plurality of synchronizer assemblies. Selective activation of combinations of the pressure control solenoids and the flow control solenoids allows for a pressurized fluid to activate at least one of the clutch actuators and synchronizer actuators in order to shift the transmission into a desired gear ratio. | 06-09-2011 |
| 20110132712 | DUAL CLUTCH - A dual clutch which has two friction clutches, a central pressure-exerting plate and two pressure plates which are axially movable relative to the pressure-exerting plate with the interposition of the friction linings of two clutch disks, which each mesh with in-each case one gearbox input shaft, of actuating devices. The dual clutch is held at the drive-input side, with the dual clutch being supported at the gearbox side by an actuating system, which holds the two actuating devices, for actuating the pressure plates, and with the actuating system being rotatably held on the clutch housing. | 06-09-2011 |
| 20110139564 | CONTROL SYSTEM FOR A DUAL CLUTCH TRANSMISSION - A hydraulic control system for a dual clutch transmission includes a plurality of pressure and flow control devices and logic valve assemblies in fluid communication with a plurality of clutch actuators and with a plurality of synchronizer actuators. The clutch actuators are operable to actuate a plurality of torque transmitting devices and the synchronizer actuators are operable to actuate a plurality of synchronizer assemblies. Selective activation of combinations of the pressure control solenoids and the flow control solenoids allows for a pressurized fluid to activate at least one of the clutch actuators and synchronizer actuators in order to shift the transmission into a desired gear ratio. | 06-16-2011 |
| 20110139565 | DUAL CLUTCH - A dual clutch which is particularly used in trucks. | 06-16-2011 |
| 20110214959 | HYDRAULIC CLUTCH - A hydraulic clutch for preventing a drag of a clutch at the time of disengaging the clutch by decreasing an oil supply quantity between a plurality of clutch plates and a plurality of clutch discs thus decreasing a change hitting sound at the time of shifting. A hydraulic clutch is configured such that the superposition between an oil supply hole formed in a clutch pressure plate and an oil supply hole formed in a clutch center becomes maximum when the clutch is engaged. | 09-08-2011 |
| 20110233022 | OIL PASSAGE STRUCTURE FOR HYDRAULIC CLUTCH OF AN ENGINE | 09-29-2011 |
| 20110284337 | ACTUATING ASSEMBLY - An actuating assembly for connecting a driving axle in the driveline of a motor vehicle is disclosed. The actuating assembly comprises a pump for generating a hydraulic pressure; a pressure accumulator which can be filled by the pump with a hydraulic fluid for generating a pre-pressure; a first hydraulic actuating unit for actuating a first coupling; a second hydraulic actuating unit for actuating a second coupling; wherein at least one of the two first or second hydraulic actuating units can be loaded by the pressure accumulator with hydraulic pressure and, after the pressure accumulator has been at least partially emptied, can be additionally loaded by the pump, wherein the associated first or second coupling can be actuated in the closing sense. Furthermore, a drive assembly having an inventive actuating assembly is also disclosed. | 11-24-2011 |
| 20120085614 | PRESSURE MEDIUM SUPPLY DEVICE OF A HYDRAULICALLY ACTUATED SHIFTING ELEMENT - A pressure medium supply device of a hydraulically actuated shifting element (K | 04-12-2012 |
| 20120090939 | CLUTCH ACTUATION ASSEMBLY WITH SATELLITE PISTONS - A dual clutch actuation assembly includes a housing, an annular central piston, a plurality of satellite pistons, and an annular apply member. The housing includes an inner cylindrical wall, an outer cylindrical wall, and a plurality of satellite cylindrical walls. The inner and outer walls define an inner piston annulus and the satellite walls define a plurality of satellite piston bores. Each of the satellite walls is disposed at least partially radially outward of the outer wall. The central piston is disposed in the inner piston annulus and is in sliding engagement with the inner and outer walls of the housing. The satellite pistons are disposed in the satellite piston bores and are in sliding engagement with the satellite walls of the housing. The apply member is axially engaged with each of the satellite pistons and includes an annular plate portion disposed radially outward of the outer cylindrical wall of the housing. | 04-19-2012 |
| 20120090940 | MICRO-ELECTRO-MECHANICAL-SYSTEMS BASED HYDRAULIC CONTROL SYSTEM FOR A DRY DUAL CLUTCH TRANSMISSION - A dry dual clutch transmission includes at least one hydraulic component and a pilot valve operably connected to the hydraulic component to actuate the hydraulic component. The pilot valve includes a Micro-Electro-Mechanical Systems (MEMS) based pressure differential actuator valve. The hydraulic component may include but is not limited to a first clutch and a second clutch of the dry dual clutch transmission, an on/off solenoid, a line pressure control valve or a synchronizing shift fork. | 04-19-2012 |
| 20120132498 | PARALLEL DOUBLE CLUTCH DEVICE AND DRIVETRAIN HAVING A PARALLEL DOUBLE CLUTCH DEVICE OF SAID TYPE - A parallel double-clutch device is arranged in a drivetrain of a motor vehicle between a drive unit and transmission of the drivetrain. The device comprises a first clutch arrangement assigned to a first transmission-input shaft for selectively transmitting torque between the drive unit and first transmission-input shaft. A second clutch arrangement is assigned to a second transmission-input shaft for selectively transmitting torque between the drive unit and second transmission-input shaft. The first clutch arrangement can be actuated by at least one hydraulically drivable first actuating piston assigned a first pressure chamber delimited by a first pressure-chamber housing and the first actuating piston. The second clutch arrangement can be actuated by at least one hydraulically drivable second actuating piston assigned a second pressure chamber delimited by a second pressure-chamber housing and the second actuating piston. The pressure-chamber housing is at least partially substantially stationary and/or rotationally fixed. | 05-31-2012 |
| 20120138408 | METHOD OF CONTROLLING A DUAL CLUTCH TRANSMISSION - A method of controlling a hydraulic control system for a dual clutch transmission includes controlling a plurality of pressure and flow control devices in fluid communication with a plurality of clutch actuators and with a plurality of synchronizer actuators. The clutch actuators are operable to actuate a plurality of torque transmitting devices and the synchronizer actuators are operable to actuate a plurality of synchronizer assemblies. Selective activation of combinations of the pressure control solenoids and the flow control solenoids allows for a pressurized fluid to activate at least one of the clutch actuators and synchronizer actuators in order to shift the transmission into a desired gear ratio. | 06-07-2012 |
| 20120175212 | LAUNCH / DISCONNECT CLUTCH FOR P2 HYBRID POWERTRAIN - A launch and disconnect clutch for the electric motor of a P2 hybrid powertrain is compact and provides improved operation. The clutch is mounted between the engine and transmission in the space formerly occupied by the torque converter. The clutch assembly is configured so that actuation, compensation and cooling are provided by only two oil channels. The clutch utilizes single-sided reaction plates which achieve high clutch gain thereby providing high torque capacity under electric operation and improved launch shudder characteristics. | 07-12-2012 |
| 20120175213 | DUAL CLUTCH - A dual clutch, which has a first friction clutch pulled by a first lever actuator and a second friction clutch pushed by a second lever actuator. The lever actuators each have a lever that is spring-loaded on one side and lever tips which are moved by a bearing block. The bearing block can be moved radially with along a profile of the lever to set a variable contact point of the lever between a rigid base plate and the lever to act on actuating hearings of the friction clutches. The bearing block is actuated by force application in one of the radial directions of motion by a drive controlled by a control unit in an automated manner. The drive of both lever actuators is formed by a pneumatic controller. In each drive a piston is movable in a housing and is connected to the bearing block by a piston rod. | 07-12-2012 |
| 20120199434 | POWER TRANSMITTING APPARATUS - A power transmitting apparatus can comprise a plurality of gear stage clutches arranged on the way of a power transmitting path between an engine and the wheels. Each of the gear stage clutches include alternately arranged driving clutch discs and driven clutch discs, hydraulic pistons actuated by hydraulic oil to selectively engage or disengage the driving clutch discs and driven clutch discs, hydraulic chambers for actuating the hydraulic pistons, and supplying ports communicating with oil passages formed within the input shaft and opening on the side surface of the input shaft for supplying the hydraulic chambers with hydraulic oil from the oil passages to actuate the hydraulic pistons. A plurality of the supplying ports can be formed on a same plane of a radial cross-section of the input shaft. | 08-09-2012 |
| 20120247904 | INTERNAL COMBUSTION ENGINE AND SUPPLYING OIL PATH STRUCTURE FOR HYDRAULIC CLUTCH IN INTERNAL COMBUSTION ENGINE - An internal combustion engine is provided with a plurality of hydraulic clutches, a plurality of hydraulic controlling valves for individually controlling the oil pressure for the hydraulic clutches, and a plurality of clutch oil pressure sensors for individually detecting the controlling oil pressure of controlling oil supplying paths interconnecting the hydraulic controlling valves and the hydraulic clutches. The oil pressure sensors individually correspond to the hydraulic clutches compactly, thereby to preventing an increase in size. The clutch oil pressure sensors are provided on an engine main body so as to be disposed in the proximity of and in parallel to each other while axial directions thereof are directed in a forward and backward direction of a saddle type vehicle in a state in which the engine main body is mounted on the saddle type vehicle. | 10-04-2012 |
| 20120247905 | HYDRAULIC CLUTCH AND TRANSMISSION DEVICE PROVIDED WITH THE SAME - A hydraulic clutch including a clutch drum with an outer cylinder fitted with a plurality of clutch plates and a side wall; a clutch piston that defines together with the clutch drum an engagement oil chamber, and moves in an axial direction to press the clutch plates by hydraulic pressure supplied to the engagement oil chamber; and a cancel plate that defines together with the clutch piston a cancel oil chamber that cancels centrifugal hydraulic pressure. The side wall of the clutch drum is formed with a first oil passage that radially extends and is in communication with the engagement oil chamber, and a second oil passage that radially extends and is in communication with the cancel oil chamber. One of the first and second oil passages is at least partially included in a range of an axial width of the other of the first and second oil passages. | 10-04-2012 |
| 20120298462 | CONTROL DEVICE AND CONTROL METHOD FOR TRANSMISSION MECHANISM - In the case of a return from an idle stop control in which an engine is automatically stopped, a hydraulic pressure is so supplied that a low brake is set in a completely engaged state and a high clutch is set in a slip interlock state where the high clutch is not completely engaged. | 11-29-2012 |
| 20120312655 | Hydraulic Actuating Device for Actuation Of Clutches In, In Particular, A Multi-Clutch Transmission For Motor Vehicles - A hydraulic actuating device for actuation of clutches in a multi-clutch transmission for motor vehicles is disclosed, comprising a multi-circuit pump having an electric pump drive, at least two pressure circuits hydraulically connected with the pump, and a reservoir for hydraulic fluid, from which the fluid can be conveyed by the pump to the pressure circuits. In this regard, each pressure circuit starting from the pump comprises a non-return valve blocking in the direction of the pump, an electromagnetically actuable proportional throttle valve, by way of which the respective pressure circuit can be the subject of defined hydraulic relief in direction towards the reservoir, and at the outlet side a slave cylinder operatively connected with an associated clutch. The pump drive and the proportional throttle valves are electrically connected with a control unit, which co-ordinates the electrical activation of the pump drive and the proportional throttle valves. | 12-13-2012 |
| 20130025996 | METHOD FOR CONTROLLING A DUAL CLUTCH - The invention relates to a method for controlling a dual clutch and a dual clutch housing two friction clutches which are each actuated independently of one another by means of a hydrostatic actuator. The hydrostatic actuator actuates the clutch as a function of a control signal of a control unit by means of a pressure which is applied to the actuation element and corresponds to a position of an actuation element of the friction clutch along an activation path. In order to sense a change in the position of the actuation element on one friction clutch which is brought about by the pressure on the actuation element of the other friction clutch, it is proposed to determine a correction variation for the purpose of compensating the changed position by means of a variable which represents the pressure of the disruptive hydrostatic actuator. | 01-31-2013 |
| 20130075216 | HYDRAULIC CLUTCH - A hydraulic pressure clutch includes a first connecting hub on an input shaft, an inner sleeve, a boss, an outer sleeve, a clutch drum, a second connecting hub, a first piston forming a first piston chamber together with the second connecting hub, first clutch plates disposed on an outer protrusion and selectively pushed by the first piston along an axial direction, first friction disks disposed alternately with the first clutch plates, a first balance wall forming a first balance chamber, a second piston forming a second piston chamber, second clutch plates selectively pushed by the second piston along an axial direction, second friction disks disposed alternately with the second clutch plates, and a second balance wall forming a second balance chamber, wherein the first piston penetrates through the outer protrusion for pushing the first clutch plates. | 03-28-2013 |
| 20130075217 | HYDRAULIC CLUTCH - A hydraulic pressure clutch includes a first connecting hub including first, second, and third oil holes, a transmission case having first, second, and third oil supply portions, an inner sleeve having first, second, and third oil passages, a boss having fourth, fifth, and sixth oil passages, an outer sleeve having seventh and eighth oil passages, a clutch drum, a second connecting hub, a first piston forming a first piston chamber, a plurality of first clutch plates, a plurality of first friction disks disposed alternately with the first clutch plates, a first balance wall forming a first balance chamber, a second piston forming a second piston chamber, a plurality of second clutch plates, a plurality of second friction disks disposed alternately with the second clutch plates, and a second balance wall forming a second balance chamber, wherein the first and second balance chambers are supplied simultaneously through one oil line. | 03-28-2013 |
| 20130081917 | PARALLEL DUAL CLUTCH DEVICE - One variation may include parallel, preferably wet, dual clutch device ( | 04-04-2013 |
| 20130081918 | PUMP DRIVE LAUNCH DEVICE ACTUATOR - A powertrain includes an engine, a transmission, a pump for providing pressurized hydraulic fluid and a launch clutch connected between the engine and the transmission for coupling the engine to the transmission when the launch clutch is in an engaged condition and for decoupling the engine from the transmission when the launch clutch is in a disengaged condition. A device is rotationally coupled to the engine and to the pump. The device is translatable along an axis between a first position and a second position. The device moves the launch clutch to the engaged condition when in the first position and does not move the launch clutch to the engaged condition when in the second position. A piston in communication with the pressurized hydraulic fluid provided by the pump is configured to translate the device along the axis between at least one of the first and second positions. | 04-04-2013 |
| 20130118852 | DUAL-CLUTCH TRANSMISSION - A clutch transmission, in particular a dual-clutch transmission for a vehicle, such as a motor vehicle, includes at least one automatic transmission with a hydraulically actuatable clutch and at least one hydraulically actuatable gear actuator, and a hydraulic circuit having a tank supplying an unpressurized hydraulic medium and a pressure source supplying a pressurized hydraulic medium. For operating the respective clutch, a first pressure control valve and at least one second pressure control valve are arranged upstream of the respective coupling. At least one of the pressure control valves is connected with an upstream switching device which connects the at least one pressure control valve and a hydraulically actuatable parking lock either with the pressure source or with the tank. | 05-16-2013 |
| 20130134007 | DOUBLE-CLUTCH TRANSMISSION OF A VEHICLE - A double clutch transmission of a vehicle having an internal combustion engine and a clutch chamber ( | 05-30-2013 |
| 20130206532 | DUAL-ROTOR FORCE TRANSMITTING ASSEMBLY - A dual-rotor force transmitting assembly includes a powerhead assembly having a spring housing, a plurality of first spring sets that generate a braking force for a first rotor and a plurality of second spring sets that generate a braking force for a second rotor. Using separate spring sets for each rotor ensures application of uniform and equal pressure on both rotors even if there is uneven friction surface wear. | 08-15-2013 |
| 20130206533 | HYDRAULIC CONTROL SYSTEM FOR A DUAL CLUTCH TRANSMISSION - Control systems and methods for a dual clutch transmission are provided. The control system includes a first pump for providing a first fluid to actuate the dual clutch assembly, a second pump for providing a second fluid to cool the dual clutch assembly, and a motor operatively coupled to the first and second pumps. The motor is operable in first and second directions, wherein the first pump is responsive to operation of the motor in the first direction and the second pump is responsive to operation of the motor in the second direction. The first and second pumps can be coupled to the motor about a common transfer shaft. By selectively reversing motor rotation, the motor drives the first and second pumps to provide a flow rate of hydraulic fluid and to provide a flow rate of lubricating fluid, respectively. | 08-15-2013 |
| 20130333997 | TRANSMISSION DEVICE - A fastening portion is formed from a rivet hole of a first side wall portion of a clutch drum, a rivet hole of a second side wall portion of a clutch drum, and a rivet that is inserted into the rivet hole and the rivet hole to hold together the first side wall portion and the second side wall portion. The fastening portion is provided between a first engagement side oil chamber enclosed by the clutch drum and a clutch piston, and a second engagement side oil chamber enclosed by the clutch drum and a clutch piston. | 12-19-2013 |
| 20140048374 | POWER TRANSMITTING APPARATUS - A power transmitting apparatus can include a gear-stage clutch comprising alternately arranged driving clutch discs and driven clutch discs; hydraulic chambers for actuating a hydraulic piston; and hydraulic oil supplying ports communicating with oil passages opening on the side surface of the input shaft for supplying the hydraulic chambers with hydraulic oil from the oil passages to actuate the hydraulic piston. Power can be transmitted at a predetermined gear ratio by engaging clutch discs of the gear-stage clutch by selectively supplying the hydraulic chambers with hydraulic oil. An annular sealing member can be fitted in a recessed portion formed around each opening of the hydraulic oil supplying port on the outer circumference of the input shaft. The recessed portion can have a flattened bottom surface on which the sealing member is seated so that it is contacted with the flattened bottom surface of the recessed portion. | 02-20-2014 |
| 20140110209 | CLUTCH HOUSING AND ASSEMBLY - A clutch assembly includes first, second and third clutches, a housing including a first projection to which the first clutch selectively produces a connection, a second projection to which the second and third clutches selectively produce connections, clutch-apply circuits each circuit corresponding to one of the clutches, and a balance volume circuit for supplying fluid to each of the clutches, and a shaft rotatably supporting the housing. | 04-24-2014 |
| 20140246284 | Actuator Arrangement for a Motor Vehicle Drivetrain, with Control Method for the Same - An actuator arrangement for a motor vehicle drivetrain, in particular for a dual-clutch arrangement. A first fluid cylinder is connected via a first fluid connection to a fluid supply device. A second fluid cylinder is connected via a second fluid connection to the fluid supply device. A pressure measuring arrangement has a single pressure sensor which is connected by means of a connecting arrangement to the first fluid connection and to the second fluid connection. | 09-04-2014 |
| 20140291101 | HYDRAULIC CIRCUIT, METHOD FOR OPERATING THE SAME - A dual clutch transmission, in particular of a motor vehicle, includes a hydraulic circuit for cooling the dual clutch transmission, wherein the hydraulic circuit includes at least one pump for conveying a hydraulic medium flow, at least one cooler for cooling the hydraulic medium flow, and a volume control valve for adjusting the hydraulic medium flow for at least one cooling system associated with clutches of the dual clutch transmission. The volume control valve is designed to convey the hydraulic medium flow in a first switching state to a first cooling system associated with a first of the clutches, and in at least one second switching state to a second cooling system associated with a second of the clutches. | 10-02-2014 |
| 20150321553 | HYDRAULIC SYSTEM FOR A DRIVELINE DISCONNECT WITH INDEPENDENT DRIVE REAR DRIVELINE MODULE - A hydraulic actuation system ( | 11-12-2015 |
| 20150330461 | DUAL CLUTCH COMPRISING TWO CLUTCH UNITS WHICH ACT IN A FORCE-FITTING MANNER - Dual clutch including two clutch units acting in a force-fitting manner and mounted on a common clutch hub in a rotationally fixed and axially movable manner, a pressure disk arrangement retained between the clutch units on the clutch hub in an axially fixed manner and including two axially movable pressure pistons each of which can be ventilated by a compression spring arrangement positioned in the clutch hub. Each compression spring arrangement includes multiple compression springs, each of which is arranged in a recess of the clutch hub. Each recess is introduced into the clutch hub as an axially extending blind hole. The pressure disk arrangement is received in a radial groove of the clutch hub, the groove being radially and/or axially spaced from the blind holes. | 11-19-2015 |
| 20160047426 | TRANSMISSION DEVICE - A transmission device that includes a first clutch that includes a first clutch drum, a first piston, and a first engagement oil chamber; and a second clutch that includes a second clutch drum fixed to an outer circumferential portion of the first clutch drum, a second piston, and a second engagement oil chamber. | 02-18-2016 |
| 192480602 | Operator rotatable relative to its clutch-assemblage | 4 |
| 192480603 | Operator coaxial with its clutch-assemblage | 4 |
| 20100140037 | COUPLING ARRANGEMENT - The invention relates to a coupling arrangement comprising a component ( | 06-10-2010 |
| 20100243396 | CLUTCH ACTUATOR STRUCTURE - A clutch actuator structure provided for an internal combustion engine and a hydraulic clutch mechanism for transmitting a rotational driving force of a crankshaft of said engine includes a clutch actuator for controlling an oil pressure for engaging and disengaging the hydraulic clutch mechanism. The clutch actuator structure ensures that noises generated at the times of operation of the clutch actuator for actuating a hydraulic clutch are prevented from being transmitted to the exterior. The clutch actuator structure includes an oil sump part for reserving oil provided in the periphery of a clutch actuator. The clutch actuator is disposed in the oil sump part. | 09-30-2010 |
| 20130056323 | TWIN-CLUTCH FOR A TWIN-CLUTCH VARIABLE SPEED TRANSMISSION IN MOTOR VEHICLES - A twin-clutch for a twin-clutch variable speed transmission in motor vehicles includes two wet running multi-disk-clutches which are arranged axially in succession in a transmission housing, wherein end walls of the transmission housing are provided on respective sides of the multi disk clutches, a driving clutch housing; two transmission hubs outputting to transmission input shafts, and alternately drivingly connectable with the clutch housing via clutch disks; ring pistons shiftably supported in the end walls of the transmission housing and hydraulically pressurizeable with pressure oil via ducts arranged in the end walls to thereby cause a shifting of the ring pistons, wherein the ring pistons alternately act on the clutch disks via pressure disks, and wherein the pressure disks are actuatable from outside the clutch housing by the ring pistons; and axial rolling bearings respectively arranged between the ring pistons and the pressure disks. | 03-07-2013 |
| 20160061275 | TRANSMISSION SYSTEM HAVING A DOUBLE WET CLUTCH MECHANISM - A transmission system ( | 03-03-2016 |
| 192480609 | Axially spaced coaxial clutch-assemblages | 13 |
| 20120118695 | CLUTCH DEVICE FOR VEHICLE - A clutch device for a vehicle includes an input shaft, an output shaft coaxially arranged with a rotational axis of the input shaft, first clutch plates, second clutch plates, a piston fitted to a cylindrical portion integrally formed with the output shaft or the input shaft, an elastic member arranged between the piston and the cylindrical portion, a hydraulic chamber defined by the cylindrical portion and the piston, a canceller chamber defined by the cylindrical portion and the piston to connect to an outer side of the cylindrical portion via a discharge hole formed at a portion of the cylindrical portion, the portion being located at a predetermined radial distance from the rotational axis, and a throttle hole formed in a portion of the piston to connect the hydraulic chamber to the canceller chamber, the portion being located at a radially inward side of the portion of the cylindrical portion. | 05-17-2012 |
| 20120247906 | HYDRAULIC CLUTCH AND TRANSMISSION DEVICE PROVIDED WITH THE SAME - A hydraulic clutch includes a clutch drum with an outer cylinder that slidably holds a plurality of clutch plates, an inner cylinder that axially extends from an inner circumference of a sidewall, and a sleeve fitted inside the inner cylinder. A clutch piston presses the clutch plates. A plate and the clutch piston define an oil chamber that cancels centrifugal hydraulic pressure. An oil passage that communicates with the oil chamber is on an inner circumferential surface of the inner cylinder. One surface of the sleeve contacts a step formed on the inner cylinder. The sleeve includes a passage in communication with the oil passage and formed on an outer periphery of the sleeve to axially extend toward the end surface, and a second passage formed more axially recessed than an end surface and radially extending to provide communication between the first passage and an inner portion of the sleeve. | 10-04-2012 |
| 20120325610 | DUAL CLUTCH - A dual clutch for coupling an engine-side input shaft with a first and/or second transmission-side output shaft includes a first clutch which has a first pressure plate that is axially mobile relative to a first counter plate for coupling with a first clutch disk connected to the first output shaft, and a second clutch having a second pressure plate for coupling with a second clutch disk connected to the second output shaft, the second pressure plate being axially mobile relative to a second counter-plate. An actuating device displaces the first and/or second pressure plate, and a spring element is connected to the actuating device and a transmission housing, the spring element being axially resilient. Both the actuating device and the first counter-plate are radially supported mobile in the axial direction. The axial mobility of the dual clutch allows a simple assembly even with components that have work tolerance-related finishing inaccuracies. | 12-27-2012 |
| 20130199883 | POWER TRANSMISSION DEVICE - Pressures of left and right clutch pistons ( | 08-08-2013 |
| 20140048375 | POWER TRANSMITTING APPARATUS - A power transmitting apparatus configured to connect an input from an engine and an output to a driving wheel side at a predetermined gear ratio and to arbitrarily set the gear ratio during power transmission from the engine to the wheels. The apparatus comprises: a first partition member and a second partition member arranged opposite each other to form hydraulic chambers; a first clutch disc group comprising interleaved driving and driven clutch discs; a second clutch disc group comprising interleaved driving and driven clutch discs; and a hydraulic piston actuated by hydraulic pressure supplied to the hydraulic chambers to engage or disengage the driving and driven clutch discs of either of the first clutch disc group or the second clutch disc group depending on the actuated direction of the hydraulic piston, the driving power transmitted at a desirable gear ratio by selectively actuating the hydraulic piston. | 02-20-2014 |
| 20140209424 | Dual Clutch Device - The present invention relates to a dual clutch device which comprises: a retainer portion to which a rotation force is transmitted; a pair of plate portions provided to the retainer portion; disc portions which are respectively arranged at the plate portions; a herb portion connected to the disc portion; piston portions which respectively apply pressure to the plate portions; driving portions which respectively move the piston portions; and a restoration portion which is arranged between the driving portions and provides a restoration force to the piston portions. The dual clutch device, according to the invention, uses one restoration portion, thereby simplifying a flow path and reducing the size of a product. | 07-31-2014 |
| 20160108977 | METHOD FOR A HYDRAULIC SYSTEM FOR A DUAL-CLUTCH GEARBOX - A hydraulic system for an automatic gearbox for a motor vehicle, includes a high-pressure circuit which includes a pressure accumulator, at least one clutch and actuators, and a low-pressure circuit for cooling the clutch, the high-pressure circuit and the low-pressure circuit each containing a hydraulic cooling pump and a hydraulic charging pump that can be driven by a shared electric motor; and a controller which, when it is detected that the pressure accumulator needs to be charged, controls the electric motor to run at a charging setpoint speed, and/or, when it is detected that cooling is needed or another need exists, controls the electric motor to run at a cooling setpoint speed or another setpoint speed. When the pressure accumulator does not need to be charged and there is no need for cooling and no other need, the controller reduces the setpoint speed to zero for a specified period. At the end of the period the controller controls the electric motor to run at least at the test speed. | 04-21-2016 |
| 192480610 | Plural fluid pressure operators forming nested pistons | 1 |
| 20110094845 | ACTUATION DEVICE FOR A DUAL CLUTCH TRANSMISSION - A dual clutch actuation device generates the axial compression force required to compress a first and second set of frictional elements of a dual clutch module. Dual clutch actuation device includes a first and second annular piston. The annular pistons include a first end that is in contact with annular bearing assemblies. The annular bearing assemblies are in contact with actuation levers that are in contact with the first set of frictional elements. The annular pistons are arranged in concentric annular piston slots. Together the piston and annular slots form annular piston chambers. The piston chambers are filled with hydraulic fluid. When the hydraulic fluid is pressurized the pistons slide out of the annular slots and apply a force on the actuation levers which in turn apply an axial compression force on the frictional elements. | 04-28-2011 |
| 192480611 | Operator coaxial with its clutch-assemblage | 5 |
| 20100072018 | TWIN CLUTCH APPARATUS - This twin-clutch apparatus for use in a transmission of an engine, including: a hydraulic first disk clutch and second disk clutch that exert a predetermined engagement force by pressure members displaced in an axial direction by the pressure of a supply oil from outside, the first disk clutch and the second disk clutch being coaxially arranged adjacent to each other, in which: clutch plates of the first disk clutch and clutch plates of the second disk clutch are different in thickness from each other. | 03-25-2010 |
| 20100072019 | TWIN CLUTCH DEVICE - In a twin clutch device used in an engine transmission, there are coaxially and adjacently arranged a first disk clutch and a second disk clutch of a hydraulic pressure type that displace a pressing member in an axial direction with externally supplied hydraulic pressure to exert a predetermined engagement force; and the first disk clutch and the second disk clutch respectively have: an engagement side hydraulic chamber that gives the pressing member a pressing force towards a clutch engagement side; and a pressure compensation hydraulic chamber that gives the pressing member a pressing force towards a clutch disengagement side to compensate a pressure of a returning action thereof. Furthermore in this twin clutch device, a plurality of pipes are internally and externally superposed and inserted into a main shaft connected to the first disk clutch and the second disk clutch, and each of a plurality of spaces within the main shaft divided by these pipes serves as an in-shaft oil passage that communicates with any one of the engagement side hydraulic chamber or the pressure compensation hydraulic chamber. | 03-25-2010 |
| 20100140038 | Piston apparatus of automatic transmission - In an embodiment of the present invention, a piston apparatus of an automatic transmission includes a piston member capable of moving in the axial direction of the rotation shaft, and a hydraulic chamber, and has been configured so that the piston member moves in the axial direction due to pressure in the hydraulic chamber. The piston member includes a cylinder part that extends in the axial direction and to which pressure in the hydraulic chamber is transmitted, a pressing part that extends in the radial direction and presses against a friction engaging element of the automatic transmission, and a connecting part that connects the cylinder part and the pressing part and, with respect to the axial direction, is offset from the pressing part in a direction of separation from the friction engaging element. Also, the axial direction offset amount of the connecting part from the pressing part of the piston member has been set larger than the stroke amount of the piston member. | 06-10-2010 |
| 20110079481 | DUAL CLUTCH - A dual clutch selectively transmits torque from a flywheel to a dual input transmission. The transmission has two input shafts a first shaft and a second shaft that is a hollow sleeve shaft. The second shaft is concentric with the first shaft. The dual clutch has two clutch units to selectively couple a crankshaft of an engine to one of the two input shafts. More specifically, the dual clutch includes members such as a clutch housing rotationally fixed to the crankshaft through a flywheel and other members such hubs that are rotationally fixed to the input shafts. The clutches are actuated by a rotationally fixed clutch actuator. Axial loads on the clutches are transferred through a bearing to a fixed member. | 04-07-2011 |
| 20120085615 | DOUBLE CLUTCH - A double clutch for a double clutch transmission in the drive train of a motor vehicle, with single clutches that are arranged behind each other in the axial dimension and actuated hydraulically, including a single clutch arranged on the drive side, a single clutch arranged on the gear side, a driven clutch housing and two piston-cylinder units. The first of the two single clutches connects the clutch housing to the first transmission input shaft and the second single clutch connects the clutch housing to a second transmission input shaft, wherein both connections can be switched. The clutch housing is connected on the drive side to a drive shaft and on the gear side to input disk carriers. | 04-12-2012 |
| 192480616 | Plural fluid pressure operators forming nested pistons | 2 |
| 20110073428 | NON-PLANAR PRESSURIZED OIL ROUTING - A casing is provided for a dual clutch actuation device of a transmission. The casing includes, but is not limited to an internal inner liquid supply passage for connecting to the inner chamber and an internal outer liquid supply passage for connecting to the outer chamber. The inner liquid supply passage includes, but is not limited to a first inner straight section and a second inner straight section for connecting to the inner chamber. Similarly, the outer liquid supply passage includes, but is not limited to a first outer straight section and a second outer straight section for connecting to the outer chamber. In particular, the inner liquid supply passage is provided essentially adjacent to the outer liquid supply passage. The first outer straight section is at an incline relative to the first inner straight section. | 03-31-2011 |
| 192480617 | At least one operator coaxial with its clutch-assemblage | 1 |
| 20160053826 | TRANSMISSION DEVICE - A transmission device that includes a first clutch that includes a first clutch drum, a first piston, and a first engagement oil chamber; and a second clutch that includes a second clutch drum fixed to an outer circumferential portion of the first clutch drum, a second piston, and a second engagement oil chamber. | 02-25-2016 |
| 192480618 | Operator coaxial with its clutch-assemblage | 5 |
| 20110048887 | ACTUATION DEVICE HAVING WIPER SEALS FOR A DUAL CLUTCH TRANSMISSION - A dual clutch actuation device generates the axial compression force required to compress a first and second set of frictional elements of a dual clutch module. Dual clutch actuation device includes a first and second annular piston. The annular pistons include a first end that is in contact with annular bearing assemblies. The annular bearing assemblies are in contact with actuation levers that are in contact with the first set of frictional elements. The annular pistons are arranged in concentric annular piston slots. Together the piston and annular slots form annular piston chambers. The piston chambers are filled with hydraulic fluid. The actuation device further includes a first set of wiper seals and a second set of wiper seals disposed in a first and a second annular channel in each of the annular pistons. When the hydraulic fluid is pressurized the pistons slide out of the annular slots and apply a force on the actuation levers which in turn apply an axial compression force on the frictional elements. Advantageously, contamination of the piston chambers is reduced or eliminated through the wiping or cleansing action of the first and second set of wiper seals against walls of the annular slots formed in the housing of the actuation device. | 03-03-2011 |
| 20120247907 | TRANSMISSION DEVICE - A transmission device includes a first clutch and a second clutch that is disposed circumferentially inward of the first clutch so as to overlap with the first clutch as viewed from a radial direction. The first clutch includes a first clutch drum, a first clutch piston that is axially movable by hydraulic pressure supplied to a first engagement side oil chamber on an inner circumferential side of the first clutch drum, and a first cancel plate that defines together with the first clutch piston a first cancel oil chamber that cancels centrifugal hydraulic pressure. The first cancel plate is fastened between the first clutch drum and a second clutch drum of the second clutch. | 10-04-2012 |
| 20160108972 | DUAL PISTON ACTUATOR - A power transmitting component can include a friction clutch, hydraulic ram, and an actuator. The actuator can include first and second pistons, and a resilient member. The resilient member can translate the first piston to provide a high volume of fluid at low pressure to the ram when a pressure in a first chamber is less than a predetermined pressure and the second piston is translated in a first direction. The resilient member can compress between the first and second pistons to permit relative motion between the pistons when the pressure is equal to, or greater than, the predetermined pressure and the second piston is translated in the first direction. The second piston provides a low volume of fluid at high pressure to the ram when pressure in the first chamber is equal to, or greater than, the predetermined pressure and the second piston is translated in the first direction. | 04-21-2016 |
| 192480619 | Radially spaced coaxial clutch-assemblages | 2 |
| 20120241278 | DUAL CLUTCH ASSEMBLY FOR A TRANSMISSION HAVING TWO INPUT SHAFTS - A dual clutch arrangement for a transmission that is provided with a first input shaft and a second input shaft has a clutch housing that is connectable to a drive train in a rotationally fixed fashion. The first and second friction clutches can transmit a torque between the clutch housing and the first and the second input shafts, respectively. The first and second friction clutches are nested in the radial direction with respect to each other and actuated by a first and a second actuating unit that have pistons for pressuring clutch disk packs. The compressive force exerted by the piston of the first actuating unit and the compressive force exerted by the piston of the second actuating unit are directed in axially opposite directions with respect to each other. | 09-27-2012 |
| 20180023634 | Transmission and Vehicle | 01-25-2018 |
