| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 192085000 | Fluid pressure | 48 |
| 20080202887 | Adjustment Device for Motorcycle Master Cylinders - An adjustment device ( | 08-28-2008 |
| 20080217134 | Process for pressure actuation of a shifting element - The invention concerns a process for pressure actuation of a rotating shifting element of an automatic transmission or automated manual transmission, in which the shifting element is configured with a piston that interacts with a torque transfer element and a pressure medium supply, by way of which the piston can be actuated with pressure medium in order to be displaced into a positioned defined for an activated state of the shifting element, and in which a pressure pulse can be induced in the pressure medium supply in a de-activated state of the shifting element. It is proposed that the pressure medium pulse be triggered when the pressure medium amount drained from the de-activated shifting element has reached a predefined value. | 09-11-2008 |
| 20080251347 | Piston for hydraulic clutch - For incremental sealing performance and cost reduction, a piston comprises a piston main body ( | 10-16-2008 |
| 20080277239 | Motor Vehicle Hydraulic Pump - A motor vehicle hydraulic pump ( | 11-13-2008 |
| 20080277240 | Driving force transmitting device - A driving force transmitting devices is able to engage a main clutch with a small amount of hydraulic pressure. The driving force transmitting device includes an input shaft and an output shaft, and a main clutch. The device is formed of a primary clutch that intermittently transmits the driving force transmitted from the input shaft, a hydraulic pump that generates a hydraulic pressure, a piston that presses the primary clutch by the hydraulic pressure by the hydraulic pump, and a cam mechanism that presses the main clutch with a press-contact force amplified more than the press-contact force of the piston by utilizing the driving force from the input shaft through the primary clutch, so as to engage the main clutch. | 11-13-2008 |
| 20080283355 | Hydraulic system for a vehicle - A hydraulic system for actuating a clutch of a vehicle, in particular a commercial vehicle, having a pressure reducing valve under system pressure for pressuring the clutch with an actuating pressure in normal operation, where at least one additional reserve valve assembly is provided for emergency operation. In addition, a hydraulic system is proposed for actuating a variator of a CVT transmission of a vehicle, in particular a commercial vehicle, having at least one pressure reducing valve for pressuring a first shifting chamber and a second shifting chamber of the pulleys with an adjusting pressure to set a transmission ratio in normal operation, where at least one selector valve is connected to the first shifting chamber and the second shifting chamber of the respective pulleys. | 11-20-2008 |
| 20080296124 | Hydraulic System in Motor Vehicles - A hydraulic system in motor vehicles with at least one hydraulically actuated clutch, which entails minimized control complexity for supplying the clutch with hydraulic oil and which takes up less structural space. These characteristics are achieved essentially in that the pressure control of the hydraulically actuated clutch is effected directly and exclusively by an electrically driven and electronically controlled oil pump. | 12-04-2008 |
| 20090014275 | Clutch System with a Hydraulically Actuated Clutch Device - A clutch system has a clutch device, an actuating device for the hydraulic actuation of the clutch device, and a hydraulic system. The hydraulic system includes a master cylinder that is actuated by the actuating device, a slave cylinder for actuating the clutch device fluidically connected with the master cylinder through a pressure line. A first branch line is connected to the pressure space of the master cylinder or between the pressure spaces of the master cylinder and slave cylinder. The first branch line is also connected to a compensating tank volume. A second branch line is connected to the pressure space of the slave cylinder or arranged between the pressure spaces of the master and slave cylinders. The second branch line is also connected to the compensating tank volume. A device is disposed to blocking the second branch line during an actuation of the clutch device by way of the actuating device. This provides for an inherently safe, self-ventilating hydraulic system. | 01-15-2009 |
| 20090038908 | Friction clutch having a hydraulic actuator, and drive unit having at least one such friction clutch - The invention relates to a friction clutch having a single-acting actuator which is a piston-cylinder unit and is connected in a controllable fashion to a pressurized fluid source. In order to be able to carry out a fast pilot stroke up to the point at which the clutch makes contact, the piston-cylinder unit has a stepped piston whose first step of small diameter delimits, by means of its cylinder, a first pressure space, and whose second step of relatively large diameter delimits, by means of its cylinder, a second pressure space, a pressure line being connected to the first pressure space and, by means of a first non-return valve which opens at a certain pressure, to the second pressure space, and it also being possible for the second pressure space to be connected via a discharge line and a suction line, which contains a second non-return valve, to the fluid reservoir. The invention also relates to a drive device having clutches of said type. | 02-12-2009 |
| 20090045028 | Clutch Actuation System with Locking Mechanism and Method of Controlling Engagement of a Clutch - A clutch actuation system for engaging and disengaging a clutch includes a hydraulically-actuated piston movable in response to hydraulic pressure to an apply position in which the piston is operable to engage the clutch. An electro mechanical actuator is movable in response to electric power to contact the piston at the apply position such that the clutch is maintained in an engaged state by the actuator, thereby permitting hydraulic pressure to be released. A method of controlling engagement of the clutch is also provided. | 02-19-2009 |
| 20090057092 | CLUTCH HYDRAULIC SYSTEM FOR VEHICLE AND HYDRAULIC SYSTEM - A clutch hydraulic system for a vehicle wherein it is possible to independently operate two systems, to increase the degree of freedom in designing, and to achieve a reduction in cost. A seesaw member for transmitting motive power is provided between a second release cylinder and a first master cylinder, the first master cylinder and a second hydraulic oil pipe communicate with each other through a large diameter hole and a small diameter hole provided as communicating passages through which oil flows. A reservoir tank is provided for reserving the oil for controlling the amounts of the oil in the hydraulic oil passage on the side of the first master cylinder and the amount of the oil in the hydraulic oil passage on the side of the second release cylinder is connected to a second master cylinder. | 03-05-2009 |
| 20090127061 | METHOD OF FEEDING A CLUTCH CYLINDER OF A HYDRAULICALLY ACTUATED CLUTCH SYSTEM - A method of feeding a clutch cylinder in a hydraulically actuated clutch system in a motor vehicle and a respective hydraulically actuated clutch system are suggested. The clutch system comprises at least one clutch that can be closed by filling the clutch cylinder; and a hydraulic system that provides a system pressure and has a clutch control valve having an inlet and an outlet. A system pressure is applied at the inlet of the control valve; the clutch pressure for actuating the clutch is provided at the outlet; and the system pressure is decreased pressure prior to and during the filling of the clutch cylinder. The decreased system pressure allows a high volume flow and therefore a fast filling of the clutch cylinder without establishing a premature torque transmitting capacity in the clutch. | 05-21-2009 |
| 20090139826 | MOTORCYCLE-USE POWER UNIT - In a motorcycle-use power unit in which a clutch device arranged in a power transmission path between a crankshaft and a drive wheel is housed in a clutch chamber which is defined between a crankcase and a clutch cover joined to a side surface of the crankcase, the maintenance of the clutch control device can be easily performed while preventing a lowering of oil-pressure transmission efficiency between the clutch device and the clutch control device and preventing an increase in the weight of the motorcycle. A clutch control device performs a changeover of engagement and disengagement of a clutch device by controlling the oil pressure applied to the clutch device. Oil passages for connecting the clutch control device and the clutch device with each other are mounted on a clutch cover. | 06-04-2009 |
| 20090139827 | Clutch control device - A clutch control device for controlling the operation of a hydraulically operated clutch with a flow control valve. The control device includes a volume flow regulating valve that enables both volume flow regulated filling and volume flow regulated emptying of a hydraulic clutch positioning element, to provide rapid and precise operation of the clutch. | 06-04-2009 |
| 20090166147 | Road vehicle integrated clutch-transmission assembly - An integrated clutch-transmission assembly for a road vehicle; the integrated clutch-transmission assembly has a power-assisted clutch having a number of first hydraulic actuators; a power-assisted transmission having a number of second hydraulic actuators; a high-pressure pump for the hydraulic actuators; a number of solenoid valves for controlling the hydraulic actuators; a housing having a first chamber housing the clutch, and a second chamber housing the transmission; and a flat supporting plate, which is housed removably inside the housing to separate the two chambers of the housing, has a first wall fitted with the clutch, and has a second wall parallel to and opposite the first wall and fitted with the high-pressure pump and at least some of the solenoid valves. | 07-02-2009 |
| 20090205925 | Clutch for Torque Transmission Between a Shaft and a Roller which is Arranged Coaxially Around the Shaft - The present invention relates to a clutch ( | 08-20-2009 |
| 20090250310 | TRANSMISSION APPARATUS COMPRISING AT LEAST ONE POSITIVE SHIFTING ELEMENT HYDRAULICALLY ACTUATED BY WAY OF A HYDRAULIC SYSTEM - A transmission apparatus ( | 10-08-2009 |
| 20090266671 | CLUTCH OPERATION MECHANISM - A clutch operation mechanism wherein when a clutch is disengaged and engaged by manual operation or by operation of an actuator the one operation does not affect the other operation. The clutch operation mechanism includes a lever side lost mechanism which is disposed between a clutch lever and a turn-operating force transmitting member for interrupting, from the clutch lever side, an operated-force applied from the turn-operating force transmitting member by driving the electric motor when the clutch lever is not operated. A motor side lost mechanism is disposed between the electric motor and the turn-operating force transmitting member and interrupts, from the side of the electric motor, the operated-force applied from the turn-operating force transmitting member by operating the clutch lever when the electric motor is not operated. | 10-29-2009 |
| 20100018833 | System and Method for Controlling a Clutch Fill Event - A method optimizes a fill event of an apply chamber of a fluid-actuated clutch, and includes determining input values describing the fill event, and then estimating a fill time using the input values. The method includes filling the apply chamber using the estimated fill time (EFT) or within an allowable range of the EFT. The input values can include a command line pressure, command fill stroke pressure, and an estimated viscosity of the fluid, although other values can be used. The input values are processed through a neural network having an input layer, an optional hidden layer, and an output layer. An assembly includes a fluid-actuated clutch having an apply chamber and a controller operable for estimating the fill time required for filling the apply chamber, and for controlling the fill of the apply chamber within the EFT. | 01-28-2010 |
| 20080264754 | HYDRAULIC CLUTCH DEVICE - A clutch actuation mechanism having a plurality of friction plates engaged with a clutch outer and a clutch inner in a relatively non-rotatable manner and arranged alternately between a bearing plate portion and a pressing plate portion. A clutch disengage/engage control mechanism for switching disengagement/engagement of the clutch actuation mechanism. A clutch piston having opposite sides facing toward a control hydraulic chamber and a hydraulic canceler chamber. A division wall member forming the hydraulic canceler chamber between the division wall member and the clutch piston for forming an oil passage, which introduces lubricating oil toward the friction plates, in cooperation with the clutch inner. A control hydraulic chamber, hydraulic canceler chamber, and division wall member are arranged within a range corresponding to the space between the outer surfaces of a bearing plate portion and pressing plate portion and radially inward of a clutch actuation mechanism. | 10-30-2008 |
| 20080296123 | Powershift Transmission Clutch System With A Predetermined Running Clearance - A simplified and improved clutch piston, retractor system is provided for controlling the running clearance of clutch plate(s) to minimize windage loss and to improve transmission shift quality. This improved shift quality helps improve operator's comfort reduce shock loads on power transmission components, and reduce the energy input to the clutches when changing gears during the acceleration and deceleration of the vehicle. The clutch piston retractor system is self adjusting to accommodate wear to the clutch disks and optimize the shift quality, while compensating for the additional travel distance. Thus, the need to periodically recalibrate the entire system is eliminated. | 12-04-2008 |
| 20090014274 | AUTOMATIC TRANSMISSION CLUTCH HAVING A ONE-PIECE RESIN BALANCER - A clutch assembly for use in an automatic transmission of a motor vehicle includes a drum movable about a rotational axis and having a generally annular recess for supporting components of the clutch assembly therein. A clutch pack is supported in the recess in the drum. A clutch piston is movably coupled to the drum and movable in a generally axial direction between engaged and disengaged positions relative to the clutch pack. At least one biasing spring continuously biases the clutch piston toward the disengaged position. A resin balancer plate has a side wall in contact with one end of the at least one biasing spring. The side wall is reinforced by a box section formed by: an outer wall that extends at an angle from one end of the side wall, an inner wall that extends from an opposite end of the side wall and is stepped in an axial direction toward the clutch piston, and a reinforcing rib interconnecting the side wall, outer wall and inner wall. An integral lip extends from an outer end of the balance plate to form a seal with the clutch piston. | 01-15-2009 |
| 20090032366 | PISTON FOR AUTOMATIC TRANSMISSION - To satisfy sealing ability and separation load between a seal ring and a piston main body | 02-05-2009 |
| 20090038906 | SEAL INTEGRAL TYPE PISTON - To maximize pressing area of a clutch pressing portion ( | 02-12-2009 |
| 20090038907 | CANCEL PLATE - In order to prevents a crack from being generated in an end portion of stoppers ( | 02-12-2009 |
| 20090250309 | Hydraulic Shift System for Power Transfer Devices - A power transfer device includes a shift collar moveable between a first position and a second position, a rotatable member, a rotary to linear movement conversion mechanism interconnecting the rotatable member and the shift collar, and a hydraulic actuator operable to drive the rotatable member. The actuator includes a vane rotatably moveable within a cavity formed in a housing and a pump selectively providing pressurized fluid acting on the vane. The vane is fixed for rotation with the rotatable member such that rotation of the vane causes the shift collar to axially translate. | 10-08-2009 |
| 20080202886 | Pressure-Regulated Friction Clutch - A pressure-regulated friction clutch is provided including a cylinder-piston unit, operated by a pressure medium, which permits a frictional connection of an output shaft with a driven plate fixed thereto and an input shaft with a driving plate fixed thereto, for the transmission of a torque from the input shaft with a permanently pressurized cylinder-piston unit. | 08-28-2008 |
| 20090014273 | Clutch System - A clutch system may include in certain embodiments a clutch body attached to a drive member such as a drive pulley, wherein the clutch body may be removed from the drive member without disassembling the clutch body. In various embodiments, the clutch body may include two clutch plates which enclose a spring-loaded pneumatic reciprocating assembly that in operation causes the plates to selectively separate and engage one another. In certain embodiments, the clutch body may be readily attached to a associated drive pulley in a single step by installation of a single set of fasteners. | 01-15-2009 |
| 20090050437 | CLUTCH DEVICE - A wet type multiple disc clutch | 02-26-2009 |
| 20100044184 | Automatic transmission - An automatic transmission includes first and second clutches, a clutch drum, a piston, a plurality of friction plates, a hydraulic oil chamber, a cancel oil chamber, a return spring, and a cancel plate, wherein a plate member that forms a cylinder portion of the hydraulic oil chamber is provided between the piston and the clutch drum of the first clutch that is located on an inner diameter side, and an oil passage that supplies an oil to the cancel oil chamber of the second clutch that is located on an outer diameter side is formed between the clutch drum and the plate member. | 02-25-2010 |
| 192086000 | Double acting | 2 |
| 20090188768 | FRICTIONAL ENGAGING PISTON AND SPRING SEAT - An annular frictional engaging piston includes an annular pressure apply portion which pushes a frictional engagement element in an axial direction against urging force of a return spring that urges in a direction opposite the frictional engagement element, and which has a cutout portion where a portion in the circumferential direction has been removed to avoid interference between the piston and another member. A partially removed region is provided, and a mounting hole for mounting the return spring on the piston is provided in a region other than the partially removed region. | 07-30-2009 |
| 20090211870 | CLUTCH ACTUATOR DEVICE - A clutch actuator device of a saddle-ride-type vehicle includes: a first master cylinder which is generating an oil pressure; a first release cylinder which is performing an engagement/disengagement operation of a clutch upon reception of the oil pressure transmitted from the first master cylinder by way of a first hydraulic pipe; and an actuator which is driving the first master cylinder in automatically performing the engagement/disengagement operation of the clutch. The clutch actuator device includes a seesaw member which constitutes a power transmission member for transmitting an operational force of a clutch lever or a drive force of the actuator to the first master cylinder, and a seesaw member rotational angle sensor which is detecting an operation quantity of the seesaw member. | 08-27-2009 |
| 192870100 | Multiple clutches | 16 |
| 20080314711 | Clutch and brake latch mechanism - A clutch including: a first piston displaceable to operate a clutch pack; a second piston; a first fluid chamber partially formed by the pistons, wherein the second piston is displaceable by fluid pressure in the first fluid chamber; and a locking means fixable by the second piston to hold the pack closed. In a preferred embodiment, the locking means includes at least one displaceable ball. In another preferred embodiment, in response to a loss of fluid pressure in the first chamber, the second piston is displaceable to enable displacement of the locking means to open the pack. In a further preferred embodiment, the clutch includes a second chamber, separate from the first chamber and partially formed by the first piston. The first piston is displaceable in response to fluid pressure in the second chamber. The pack remains closed after a loss or reduction of fluid pressure in the second chamber. | 12-25-2008 |
| 192870110 | Having independent operators | 11 |
| 20080236983 | LOW DRIVEN INERTIA DUAL CLUTCH - A clutch apparatus includes a clutch pack having a plurality of friction disks. The clutch pack will selectively transfer torque from a torque supplying member to a first torque receiving member. The apparatus also includes a first piston chamber positioned radially outward of the clutch pack. The first piston chamber is operably connected to the clutch pack for exerting a compressive force on at least a portion of the clutch pack as a first fluid is pressurized into the first piston chamber. | 10-02-2008 |
| 20090194383 | DUAL CLUTCH ARRANGEMENT - A dual clutch arrangement for a dual clutch transmission for motor vehicles has a first and a second friction clutch. The friction clutches have a common input member and in each case one output member. The output member of the first friction clutch is connected to a first shaft. The output member of the second friction clutch is connected to a second shaft which is formed as a hollow shaft concentrically around the first shaft. The first and the second friction clutches are nested radially one inside the other. The input member is mounted radially on the second shaft. | 08-06-2009 |
| 20090205924 | Double clutch system - A double clutch system for a drive train that includes a drive unit and a double clutch transmission. The double clutch system includes two wet-running, multi-plate clutches that include inner plate carrier components, each of which is non-rotatably connected to a respective transmission input shaft, and between which cooling oil is supplied to the multi-plate clutches. A pressure chamber is provided for the cooling oil radially inwardly of at least one of the multi-plate clutches and in an axial direction between the inner plate carrier components. | 08-20-2009 |
| 20090229942 | Device for Actuating a Multiplate Clutch in a Transmission - A device for actuating a disk clutch (B) in a transmission, which consists of an actuating piston-cylinder arrangement with rotation pressure compensation, whose actuating piston ( | 09-17-2009 |
| 20090272616 | METHOD AND APPARATUS FOR CLUTCH PRESSURE CONTROL - A method, apparatus and system for controlling transmission clutch system output pressures is provided. A transmission control unit and a pressure control device including an electro-hydraulic valve and a pressure switch cooperate to provide self-calibrating clutch pressure control systems. | 11-05-2009 |
| 20100025180 | TWIN CLUTCH DEVICE - In 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 toward a clutch disengagement side to compensate a pressure of a returning action thereof. Furthermore in this twin clutch device there are provided: a first actuator that controls hydraulic pressure supply to the engagement side hydraulic pressure chamber of the first disk clutch, and a second actuator that controls hydraulic pressure supply to the engagement side hydraulic chamber of the second disk clutch; and a hydraulic pressure cut-off device that brings the first disk clutch and the second disk clutch into a disengagement state. | 02-04-2010 |
| 20100025181 | CLUTCH ARRANGEMENT - The invention relates to a clutch arrangement having a component which is fixed to a housing, having a piston which is arranged so as to be rotatable about a rotational axis relative to the component which is fixed to the housing, having a hollow cylindrical or annular chamber which surrounds the piston at its end-side region, and having a line arrangement which, for conducting a pressure medium for actuating the piston, leads to the chamber through the component which is fixed to the housing, wherein the chamber is formed as a constituent part of the component which is fixed to the housing and which forms a cylinder, and wherein the piston is arranged in the chamber so as to be rotatable. | 02-04-2010 |
| 192870120 | Responsive to rotational speed of clutch-element | 1 |
| 20090071789 | POWER TRANSMITTING APPARATUS - A power transmitting apparatus can include a clutch housing rotatable together with an input member and supporting a plurality of driving clutch plates. A clutch member can support a plurality of driven clutch plates alternately arranged between the driving clutch plates via spline fitting and connected to an output member. A pressure member can be mounted on the clutch member and axially movably therealong for carrying out the pressure-contact or release between the driving clutch plates and the driven clutch plates. Back-torque limiting cams can be configured to release the connection between the driving clutch plates and the driven clutch plates when the rotation speed of the output member has exceeded that of the input member. A rotational force input to the input member can be transmitted to or cut-off from the output member by carrying out the pressure-contact or release between the driving clutch plates and the driven clutch plates. The driven clutch plates can be supported by a two-part structure in which some of the driven clutch plates are supported on the clutch member by a spline fitting portion and the other driven clutch plates are supported on the pressure member by a spline fitting portion. The power transmitting apparatus can further comprise a device or assembly configured to preventing slipping-off of the driven clutch plates into a separated portion between the spline fitting portion of the clutch member and the spline fitting portion of the pressure member. | 03-19-2009 |
| 192870130 | With selective distributor for fluid pressure | 3 |
| 20080223683 | Hydraulic system for controlling a double-clutch transmission - A hydraulic system for controlling a double-clutch transmission operating with wet clutches. A pump provides a system pressure in a supply line, and a control valve for applying to individual clutch actuators an actuation pressure that is derived from the system pressure and that is modulated in accordance with the operating conditions. A charging valve directs hydraulic fluid delivered by the pump into a return line when the system pressure is reached, wherein the hydraulic fluid flowing through the return line can be fed to the clutches to cool them. | 09-18-2008 |
| 20090032359 | Hydraulic Vehicle Clutch System and Method - A hydraulic system for a vehicle clutch assembly can include a pump and a purge valve for regulating hydraulic pressure supplied to the clutch. The hydraulic pressure at the pump can be set to a value higher than the operating pressure for the clutch. 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. The system can be configured to provide accurate control of the clutch(es), continuous cooling capacity to the hydraulic system components, lateral torque control when two separate hydraulic circuits are used, weight and cost reduction of the vehicle clutch, as well as other vehicle functions and characteristics. | 02-05-2009 |
| 20090032360 | Hydraulic Vehicle Clutch System and Method - A hydraulic system for a vehicle clutch assembly can include a pump and a purge valve for regulating hydraulic pressure supplied to the clutch. The hydraulic pressure at the pump can be set to a value higher than the operating pressure for the clutch. 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. The system can be configured to provide accurate control of the clutch(es), continuous cooling capacity to the hydraulic system components, lateral torque control when two separate hydraulic circuits are used, weight and cost reduction of the vehicle clutch, as well as other vehicle functions and characteristics. | 02-05-2009 |
| 192870140 | Alternatively operative clutches | 4 |
| 20090045026 | Dual Clutch Transmission - A dual clutch transmission comprises a first clutch to be engaged for setting any one of forward-traveling odd-numbered speeds and a second clutch to be engaged for setting any one of forward-traveling even-numbered speeds. The dual clutch transmission establishes a desired forward-traveling speed by alternately engaging/disengaging the first and second clutches. A backward-traveling drive train is adapted to be driven by engaging one of the first and second clutches. When a reverse mode is established by a mode setting means, the one of the first and second clutches is engaged to drive the backward-traveling drive train by setting a speed change manipulator at a backward-traveling position, and the other of the first and second clutches is engaged to drive a fixed one forward-traveling speed drive train by setting the speed change manipulator at a forward-traveling position. While the reverse mode is established, the backward-traveling drive train and the fixed one forward-traveling speed drive train are kept activated regardless of whether the first or second clutch is engaged. | 02-19-2009 |
| 20090084651 | STRUCTURE FOR DISPOSING CLUTCH CONTROL APPARATUS IN POWER UNIT FOR SADDLE-RIDE TYPE VEHICLE - A clutch control apparatus for receiving an air flow more easily and to obtain a higher cooling performance in a power unit for a saddle-ride type vehicle while avoiding the size of the main engine body becoming larger in the front-and-rear direction. The power unit includes a clutch apparatus installed in a clutch chamber. The clutch apparatus is disposed in the course of power transmission from a crankshaft to a drive wheel. The clutch chamber is formed between a crankcase and a clutch cover that is coupled to a side surface of the crankcase. A clutch control apparatus that controls the switching of the connection and disconnection actions of a clutch apparatus is attached to the outer surface of a clutch cover in a position at a side of a cylinder block. | 04-02-2009 |
| 192870150 | Clutches coaxial with operators | 1 |
| 20090114500 | AUTOMATIC TRANSMISSION INCLUDING CLUTCH DEVICES - An automatic transmission including a first clutch, a second clutch, a first drum in which a first piston of the first clutch is axially slidably received and that cooperates with the first piston to define a first oil chamber, a second drum disposed coaxially with the first drum, so as to accommodate the first drum, and in which a second piston of the second clutch is axially slidably received, the second drum cooperating with the second piston to define a second oil chamber, a first fluid supply portion for feeding a working fluid into the first oil chamber through the first drum and the second drum, to operate the first piston, and a second fluid supply portion for feeding the working fluid into the second oil chamber through the second drum, to operate the second piston, and wherein the second fluid supply portion is located radially outwardly of the first fluid supply portion. | 05-07-2009 |
| 192870180 | With selective distributor for fluid pressure | 1 |
| 20090065322 | Double-clutch transmission with a device for controlling a plurality of hydraulic shift cylinders - A double-clutch transmission having at least three and preferably four, hydraulic shift cylinders, and a control device to actuate the hydraulic shift cylinders. To improve the speed of operation when selecting a gear, the shift cylinders needed for gear shifting are actuated with the aid of at least three electromagnetically shiftable directional valves. | 03-12-2009 |
| 192085000 | Axially engaging-rotating motor and clutch | 2 |
| 20080202887 | Adjustment Device for Motorcycle Master Cylinders - An adjustment device ( | 08-28-2008 |
| 20080217134 | Process for pressure actuation of a shifting element - The invention concerns a process for pressure actuation of a rotating shifting element of an automatic transmission or automated manual transmission, in which the shifting element is configured with a piston that interacts with a torque transfer element and a pressure medium supply, by way of which the piston can be actuated with pressure medium in order to be displaced into a positioned defined for an activated state of the shifting element, and in which a pressure pulse can be induced in the pressure medium supply in a de-activated state of the shifting element. It is proposed that the pressure medium pulse be triggered when the pressure medium amount drained from the de-activated shifting element has reached a predefined value. | 09-11-2008 |
| 20080251347 | Piston for hydraulic clutch - For incremental sealing performance and cost reduction, a piston comprises a piston main body ( | 10-16-2008 |
| 20080277239 | Motor Vehicle Hydraulic Pump - A motor vehicle hydraulic pump ( | 11-13-2008 |
| 20080277240 | Driving force transmitting device - A driving force transmitting devices is able to engage a main clutch with a small amount of hydraulic pressure. The driving force transmitting device includes an input shaft and an output shaft, and a main clutch. The device is formed of a primary clutch that intermittently transmits the driving force transmitted from the input shaft, a hydraulic pump that generates a hydraulic pressure, a piston that presses the primary clutch by the hydraulic pressure by the hydraulic pump, and a cam mechanism that presses the main clutch with a press-contact force amplified more than the press-contact force of the piston by utilizing the driving force from the input shaft through the primary clutch, so as to engage the main clutch. | 11-13-2008 |
| 20080283355 | Hydraulic system for a vehicle - A hydraulic system for actuating a clutch of a vehicle, in particular a commercial vehicle, having a pressure reducing valve under system pressure for pressuring the clutch with an actuating pressure in normal operation, where at least one additional reserve valve assembly is provided for emergency operation. In addition, a hydraulic system is proposed for actuating a variator of a CVT transmission of a vehicle, in particular a commercial vehicle, having at least one pressure reducing valve for pressuring a first shifting chamber and a second shifting chamber of the pulleys with an adjusting pressure to set a transmission ratio in normal operation, where at least one selector valve is connected to the first shifting chamber and the second shifting chamber of the respective pulleys. | 11-20-2008 |
| 20080296124 | Hydraulic System in Motor Vehicles - A hydraulic system in motor vehicles with at least one hydraulically actuated clutch, which entails minimized control complexity for supplying the clutch with hydraulic oil and which takes up less structural space. These characteristics are achieved essentially in that the pressure control of the hydraulically actuated clutch is effected directly and exclusively by an electrically driven and electronically controlled oil pump. | 12-04-2008 |
| 20090014275 | Clutch System with a Hydraulically Actuated Clutch Device - A clutch system has a clutch device, an actuating device for the hydraulic actuation of the clutch device, and a hydraulic system. The hydraulic system includes a master cylinder that is actuated by the actuating device, a slave cylinder for actuating the clutch device fluidically connected with the master cylinder through a pressure line. A first branch line is connected to the pressure space of the master cylinder or between the pressure spaces of the master cylinder and slave cylinder. The first branch line is also connected to a compensating tank volume. A second branch line is connected to the pressure space of the slave cylinder or arranged between the pressure spaces of the master and slave cylinders. The second branch line is also connected to the compensating tank volume. A device is disposed to blocking the second branch line during an actuation of the clutch device by way of the actuating device. This provides for an inherently safe, self-ventilating hydraulic system. | 01-15-2009 |
| 20090038908 | Friction clutch having a hydraulic actuator, and drive unit having at least one such friction clutch - The invention relates to a friction clutch having a single-acting actuator which is a piston-cylinder unit and is connected in a controllable fashion to a pressurized fluid source. In order to be able to carry out a fast pilot stroke up to the point at which the clutch makes contact, the piston-cylinder unit has a stepped piston whose first step of small diameter delimits, by means of its cylinder, a first pressure space, and whose second step of relatively large diameter delimits, by means of its cylinder, a second pressure space, a pressure line being connected to the first pressure space and, by means of a first non-return valve which opens at a certain pressure, to the second pressure space, and it also being possible for the second pressure space to be connected via a discharge line and a suction line, which contains a second non-return valve, to the fluid reservoir. The invention also relates to a drive device having clutches of said type. | 02-12-2009 |
| 20090045028 | Clutch Actuation System with Locking Mechanism and Method of Controlling Engagement of a Clutch - A clutch actuation system for engaging and disengaging a clutch includes a hydraulically-actuated piston movable in response to hydraulic pressure to an apply position in which the piston is operable to engage the clutch. An electro mechanical actuator is movable in response to electric power to contact the piston at the apply position such that the clutch is maintained in an engaged state by the actuator, thereby permitting hydraulic pressure to be released. A method of controlling engagement of the clutch is also provided. | 02-19-2009 |
| 20090057092 | CLUTCH HYDRAULIC SYSTEM FOR VEHICLE AND HYDRAULIC SYSTEM - A clutch hydraulic system for a vehicle wherein it is possible to independently operate two systems, to increase the degree of freedom in designing, and to achieve a reduction in cost. A seesaw member for transmitting motive power is provided between a second release cylinder and a first master cylinder, the first master cylinder and a second hydraulic oil pipe communicate with each other through a large diameter hole and a small diameter hole provided as communicating passages through which oil flows. A reservoir tank is provided for reserving the oil for controlling the amounts of the oil in the hydraulic oil passage on the side of the first master cylinder and the amount of the oil in the hydraulic oil passage on the side of the second release cylinder is connected to a second master cylinder. | 03-05-2009 |
| 20090127061 | METHOD OF FEEDING A CLUTCH CYLINDER OF A HYDRAULICALLY ACTUATED CLUTCH SYSTEM - A method of feeding a clutch cylinder in a hydraulically actuated clutch system in a motor vehicle and a respective hydraulically actuated clutch system are suggested. The clutch system comprises at least one clutch that can be closed by filling the clutch cylinder; and a hydraulic system that provides a system pressure and has a clutch control valve having an inlet and an outlet. A system pressure is applied at the inlet of the control valve; the clutch pressure for actuating the clutch is provided at the outlet; and the system pressure is decreased pressure prior to and during the filling of the clutch cylinder. The decreased system pressure allows a high volume flow and therefore a fast filling of the clutch cylinder without establishing a premature torque transmitting capacity in the clutch. | 05-21-2009 |
| 20090139826 | MOTORCYCLE-USE POWER UNIT - In a motorcycle-use power unit in which a clutch device arranged in a power transmission path between a crankshaft and a drive wheel is housed in a clutch chamber which is defined between a crankcase and a clutch cover joined to a side surface of the crankcase, the maintenance of the clutch control device can be easily performed while preventing a lowering of oil-pressure transmission efficiency between the clutch device and the clutch control device and preventing an increase in the weight of the motorcycle. A clutch control device performs a changeover of engagement and disengagement of a clutch device by controlling the oil pressure applied to the clutch device. Oil passages for connecting the clutch control device and the clutch device with each other are mounted on a clutch cover. | 06-04-2009 |
| 20090139827 | Clutch control device - A clutch control device for controlling the operation of a hydraulically operated clutch with a flow control valve. The control device includes a volume flow regulating valve that enables both volume flow regulated filling and volume flow regulated emptying of a hydraulic clutch positioning element, to provide rapid and precise operation of the clutch. | 06-04-2009 |
| 20090166147 | Road vehicle integrated clutch-transmission assembly - An integrated clutch-transmission assembly for a road vehicle; the integrated clutch-transmission assembly has a power-assisted clutch having a number of first hydraulic actuators; a power-assisted transmission having a number of second hydraulic actuators; a high-pressure pump for the hydraulic actuators; a number of solenoid valves for controlling the hydraulic actuators; a housing having a first chamber housing the clutch, and a second chamber housing the transmission; and a flat supporting plate, which is housed removably inside the housing to separate the two chambers of the housing, has a first wall fitted with the clutch, and has a second wall parallel to and opposite the first wall and fitted with the high-pressure pump and at least some of the solenoid valves. | 07-02-2009 |
| 20090205925 | Clutch for Torque Transmission Between a Shaft and a Roller which is Arranged Coaxially Around the Shaft - The present invention relates to a clutch ( | 08-20-2009 |
| 20090250310 | TRANSMISSION APPARATUS COMPRISING AT LEAST ONE POSITIVE SHIFTING ELEMENT HYDRAULICALLY ACTUATED BY WAY OF A HYDRAULIC SYSTEM - A transmission apparatus ( | 10-08-2009 |
| 20090266671 | CLUTCH OPERATION MECHANISM - A clutch operation mechanism wherein when a clutch is disengaged and engaged by manual operation or by operation of an actuator the one operation does not affect the other operation. The clutch operation mechanism includes a lever side lost mechanism which is disposed between a clutch lever and a turn-operating force transmitting member for interrupting, from the clutch lever side, an operated-force applied from the turn-operating force transmitting member by driving the electric motor when the clutch lever is not operated. A motor side lost mechanism is disposed between the electric motor and the turn-operating force transmitting member and interrupts, from the side of the electric motor, the operated-force applied from the turn-operating force transmitting member by operating the clutch lever when the electric motor is not operated. | 10-29-2009 |
| 20100018833 | System and Method for Controlling a Clutch Fill Event - A method optimizes a fill event of an apply chamber of a fluid-actuated clutch, and includes determining input values describing the fill event, and then estimating a fill time using the input values. The method includes filling the apply chamber using the estimated fill time (EFT) or within an allowable range of the EFT. The input values can include a command line pressure, command fill stroke pressure, and an estimated viscosity of the fluid, although other values can be used. The input values are processed through a neural network having an input layer, an optional hidden layer, and an output layer. An assembly includes a fluid-actuated clutch having an apply chamber and a controller operable for estimating the fill time required for filling the apply chamber, and for controlling the fill of the apply chamber within the EFT. | 01-28-2010 |
| 20080264754 | HYDRAULIC CLUTCH DEVICE - A clutch actuation mechanism having a plurality of friction plates engaged with a clutch outer and a clutch inner in a relatively non-rotatable manner and arranged alternately between a bearing plate portion and a pressing plate portion. A clutch disengage/engage control mechanism for switching disengagement/engagement of the clutch actuation mechanism. A clutch piston having opposite sides facing toward a control hydraulic chamber and a hydraulic canceler chamber. A division wall member forming the hydraulic canceler chamber between the division wall member and the clutch piston for forming an oil passage, which introduces lubricating oil toward the friction plates, in cooperation with the clutch inner. A control hydraulic chamber, hydraulic canceler chamber, and division wall member are arranged within a range corresponding to the space between the outer surfaces of a bearing plate portion and pressing plate portion and radially inward of a clutch actuation mechanism. | 10-30-2008 |
| 20080296123 | Powershift Transmission Clutch System With A Predetermined Running Clearance - A simplified and improved clutch piston, retractor system is provided for controlling the running clearance of clutch plate(s) to minimize windage loss and to improve transmission shift quality. This improved shift quality helps improve operator's comfort reduce shock loads on power transmission components, and reduce the energy input to the clutches when changing gears during the acceleration and deceleration of the vehicle. The clutch piston retractor system is self adjusting to accommodate wear to the clutch disks and optimize the shift quality, while compensating for the additional travel distance. Thus, the need to periodically recalibrate the entire system is eliminated. | 12-04-2008 |
| 20090014274 | AUTOMATIC TRANSMISSION CLUTCH HAVING A ONE-PIECE RESIN BALANCER - A clutch assembly for use in an automatic transmission of a motor vehicle includes a drum movable about a rotational axis and having a generally annular recess for supporting components of the clutch assembly therein. A clutch pack is supported in the recess in the drum. A clutch piston is movably coupled to the drum and movable in a generally axial direction between engaged and disengaged positions relative to the clutch pack. At least one biasing spring continuously biases the clutch piston toward the disengaged position. A resin balancer plate has a side wall in contact with one end of the at least one biasing spring. The side wall is reinforced by a box section formed by: an outer wall that extends at an angle from one end of the side wall, an inner wall that extends from an opposite end of the side wall and is stepped in an axial direction toward the clutch piston, and a reinforcing rib interconnecting the side wall, outer wall and inner wall. An integral lip extends from an outer end of the balance plate to form a seal with the clutch piston. | 01-15-2009 |
| 20090032366 | PISTON FOR AUTOMATIC TRANSMISSION - To satisfy sealing ability and separation load between a seal ring and a piston main body | 02-05-2009 |
| 20090038906 | SEAL INTEGRAL TYPE PISTON - To maximize pressing area of a clutch pressing portion ( | 02-12-2009 |
| 20090038907 | CANCEL PLATE - In order to prevents a crack from being generated in an end portion of stoppers ( | 02-12-2009 |
| 20090250309 | Hydraulic Shift System for Power Transfer Devices - A power transfer device includes a shift collar moveable between a first position and a second position, a rotatable member, a rotary to linear movement conversion mechanism interconnecting the rotatable member and the shift collar, and a hydraulic actuator operable to drive the rotatable member. The actuator includes a vane rotatably moveable within a cavity formed in a housing and a pump selectively providing pressurized fluid acting on the vane. The vane is fixed for rotation with the rotatable member such that rotation of the vane causes the shift collar to axially translate. | 10-08-2009 |
| 20080202886 | Pressure-Regulated Friction Clutch - A pressure-regulated friction clutch is provided including a cylinder-piston unit, operated by a pressure medium, which permits a frictional connection of an output shaft with a driven plate fixed thereto and an input shaft with a driving plate fixed thereto, for the transmission of a torque from the input shaft with a permanently pressurized cylinder-piston unit. | 08-28-2008 |
| 20090014273 | Clutch System - A clutch system may include in certain embodiments a clutch body attached to a drive member such as a drive pulley, wherein the clutch body may be removed from the drive member without disassembling the clutch body. In various embodiments, the clutch body may include two clutch plates which enclose a spring-loaded pneumatic reciprocating assembly that in operation causes the plates to selectively separate and engage one another. In certain embodiments, the clutch body may be readily attached to a associated drive pulley in a single step by installation of a single set of fasteners. | 01-15-2009 |
| 20090050437 | CLUTCH DEVICE - A wet type multiple disc clutch | 02-26-2009 |
| 20100044184 | Automatic transmission - An automatic transmission includes first and second clutches, a clutch drum, a piston, a plurality of friction plates, a hydraulic oil chamber, a cancel oil chamber, a return spring, and a cancel plate, wherein a plate member that forms a cylinder portion of the hydraulic oil chamber is provided between the piston and the clutch drum of the first clutch that is located on an inner diameter side, and an oil passage that supplies an oil to the cancel oil chamber of the second clutch that is located on an outer diameter side is formed between the clutch drum and the plate member. | 02-25-2010 |
| 192085000 | Axially engaging clamping rotating motor and clutch | 7 |
| 20080202887 | Adjustment Device for Motorcycle Master Cylinders - An adjustment device ( | 08-28-2008 |
| 20080217134 | Process for pressure actuation of a shifting element - The invention concerns a process for pressure actuation of a rotating shifting element of an automatic transmission or automated manual transmission, in which the shifting element is configured with a piston that interacts with a torque transfer element and a pressure medium supply, by way of which the piston can be actuated with pressure medium in order to be displaced into a positioned defined for an activated state of the shifting element, and in which a pressure pulse can be induced in the pressure medium supply in a de-activated state of the shifting element. It is proposed that the pressure medium pulse be triggered when the pressure medium amount drained from the de-activated shifting element has reached a predefined value. | 09-11-2008 |
| 20080251347 | Piston for hydraulic clutch - For incremental sealing performance and cost reduction, a piston comprises a piston main body ( | 10-16-2008 |
| 20080277239 | Motor Vehicle Hydraulic Pump - A motor vehicle hydraulic pump ( | 11-13-2008 |
| 20080277240 | Driving force transmitting device - A driving force transmitting devices is able to engage a main clutch with a small amount of hydraulic pressure. The driving force transmitting device includes an input shaft and an output shaft, and a main clutch. The device is formed of a primary clutch that intermittently transmits the driving force transmitted from the input shaft, a hydraulic pump that generates a hydraulic pressure, a piston that presses the primary clutch by the hydraulic pressure by the hydraulic pump, and a cam mechanism that presses the main clutch with a press-contact force amplified more than the press-contact force of the piston by utilizing the driving force from the input shaft through the primary clutch, so as to engage the main clutch. | 11-13-2008 |
| 20080283355 | Hydraulic system for a vehicle - A hydraulic system for actuating a clutch of a vehicle, in particular a commercial vehicle, having a pressure reducing valve under system pressure for pressuring the clutch with an actuating pressure in normal operation, where at least one additional reserve valve assembly is provided for emergency operation. In addition, a hydraulic system is proposed for actuating a variator of a CVT transmission of a vehicle, in particular a commercial vehicle, having at least one pressure reducing valve for pressuring a first shifting chamber and a second shifting chamber of the pulleys with an adjusting pressure to set a transmission ratio in normal operation, where at least one selector valve is connected to the first shifting chamber and the second shifting chamber of the respective pulleys. | 11-20-2008 |
| 20080296124 | Hydraulic System in Motor Vehicles - A hydraulic system in motor vehicles with at least one hydraulically actuated clutch, which entails minimized control complexity for supplying the clutch with hydraulic oil and which takes up less structural space. These characteristics are achieved essentially in that the pressure control of the hydraulically actuated clutch is effected directly and exclusively by an electrically driven and electronically controlled oil pump. | 12-04-2008 |
| 20090014275 | Clutch System with a Hydraulically Actuated Clutch Device - A clutch system has a clutch device, an actuating device for the hydraulic actuation of the clutch device, and a hydraulic system. The hydraulic system includes a master cylinder that is actuated by the actuating device, a slave cylinder for actuating the clutch device fluidically connected with the master cylinder through a pressure line. A first branch line is connected to the pressure space of the master cylinder or between the pressure spaces of the master cylinder and slave cylinder. The first branch line is also connected to a compensating tank volume. A second branch line is connected to the pressure space of the slave cylinder or arranged between the pressure spaces of the master and slave cylinders. The second branch line is also connected to the compensating tank volume. A device is disposed to blocking the second branch line during an actuation of the clutch device by way of the actuating device. This provides for an inherently safe, self-ventilating hydraulic system. | 01-15-2009 |
| 20090038908 | Friction clutch having a hydraulic actuator, and drive unit having at least one such friction clutch - The invention relates to a friction clutch having a single-acting actuator which is a piston-cylinder unit and is connected in a controllable fashion to a pressurized fluid source. In order to be able to carry out a fast pilot stroke up to the point at which the clutch makes contact, the piston-cylinder unit has a stepped piston whose first step of small diameter delimits, by means of its cylinder, a first pressure space, and whose second step of relatively large diameter delimits, by means of its cylinder, a second pressure space, a pressure line being connected to the first pressure space and, by means of a first non-return valve which opens at a certain pressure, to the second pressure space, and it also being possible for the second pressure space to be connected via a discharge line and a suction line, which contains a second non-return valve, to the fluid reservoir. The invention also relates to a drive device having clutches of said type. | 02-12-2009 |
| 20090045028 | Clutch Actuation System with Locking Mechanism and Method of Controlling Engagement of a Clutch - A clutch actuation system for engaging and disengaging a clutch includes a hydraulically-actuated piston movable in response to hydraulic pressure to an apply position in which the piston is operable to engage the clutch. An electro mechanical actuator is movable in response to electric power to contact the piston at the apply position such that the clutch is maintained in an engaged state by the actuator, thereby permitting hydraulic pressure to be released. A method of controlling engagement of the clutch is also provided. | 02-19-2009 |
| 20090057092 | CLUTCH HYDRAULIC SYSTEM FOR VEHICLE AND HYDRAULIC SYSTEM - A clutch hydraulic system for a vehicle wherein it is possible to independently operate two systems, to increase the degree of freedom in designing, and to achieve a reduction in cost. A seesaw member for transmitting motive power is provided between a second release cylinder and a first master cylinder, the first master cylinder and a second hydraulic oil pipe communicate with each other through a large diameter hole and a small diameter hole provided as communicating passages through which oil flows. A reservoir tank is provided for reserving the oil for controlling the amounts of the oil in the hydraulic oil passage on the side of the first master cylinder and the amount of the oil in the hydraulic oil passage on the side of the second release cylinder is connected to a second master cylinder. | 03-05-2009 |
| 20090127061 | METHOD OF FEEDING A CLUTCH CYLINDER OF A HYDRAULICALLY ACTUATED CLUTCH SYSTEM - A method of feeding a clutch cylinder in a hydraulically actuated clutch system in a motor vehicle and a respective hydraulically actuated clutch system are suggested. The clutch system comprises at least one clutch that can be closed by filling the clutch cylinder; and a hydraulic system that provides a system pressure and has a clutch control valve having an inlet and an outlet. A system pressure is applied at the inlet of the control valve; the clutch pressure for actuating the clutch is provided at the outlet; and the system pressure is decreased pressure prior to and during the filling of the clutch cylinder. The decreased system pressure allows a high volume flow and therefore a fast filling of the clutch cylinder without establishing a premature torque transmitting capacity in the clutch. | 05-21-2009 |
| 20090139826 | MOTORCYCLE-USE POWER UNIT - In a motorcycle-use power unit in which a clutch device arranged in a power transmission path between a crankshaft and a drive wheel is housed in a clutch chamber which is defined between a crankcase and a clutch cover joined to a side surface of the crankcase, the maintenance of the clutch control device can be easily performed while preventing a lowering of oil-pressure transmission efficiency between the clutch device and the clutch control device and preventing an increase in the weight of the motorcycle. A clutch control device performs a changeover of engagement and disengagement of a clutch device by controlling the oil pressure applied to the clutch device. Oil passages for connecting the clutch control device and the clutch device with each other are mounted on a clutch cover. | 06-04-2009 |
| 20090139827 | Clutch control device - A clutch control device for controlling the operation of a hydraulically operated clutch with a flow control valve. The control device includes a volume flow regulating valve that enables both volume flow regulated filling and volume flow regulated emptying of a hydraulic clutch positioning element, to provide rapid and precise operation of the clutch. | 06-04-2009 |
| 20090166147 | Road vehicle integrated clutch-transmission assembly - An integrated clutch-transmission assembly for a road vehicle; the integrated clutch-transmission assembly has a power-assisted clutch having a number of first hydraulic actuators; a power-assisted transmission having a number of second hydraulic actuators; a high-pressure pump for the hydraulic actuators; a number of solenoid valves for controlling the hydraulic actuators; a housing having a first chamber housing the clutch, and a second chamber housing the transmission; and a flat supporting plate, which is housed removably inside the housing to separate the two chambers of the housing, has a first wall fitted with the clutch, and has a second wall parallel to and opposite the first wall and fitted with the high-pressure pump and at least some of the solenoid valves. | 07-02-2009 |
| 20090205925 | Clutch for Torque Transmission Between a Shaft and a Roller which is Arranged Coaxially Around the Shaft - The present invention relates to a clutch ( | 08-20-2009 |
| 20090250310 | TRANSMISSION APPARATUS COMPRISING AT LEAST ONE POSITIVE SHIFTING ELEMENT HYDRAULICALLY ACTUATED BY WAY OF A HYDRAULIC SYSTEM - A transmission apparatus ( | 10-08-2009 |
| 20090266671 | CLUTCH OPERATION MECHANISM - A clutch operation mechanism wherein when a clutch is disengaged and engaged by manual operation or by operation of an actuator the one operation does not affect the other operation. The clutch operation mechanism includes a lever side lost mechanism which is disposed between a clutch lever and a turn-operating force transmitting member for interrupting, from the clutch lever side, an operated-force applied from the turn-operating force transmitting member by driving the electric motor when the clutch lever is not operated. A motor side lost mechanism is disposed between the electric motor and the turn-operating force transmitting member and interrupts, from the side of the electric motor, the operated-force applied from the turn-operating force transmitting member by operating the clutch lever when the electric motor is not operated. | 10-29-2009 |
| 20100018833 | System and Method for Controlling a Clutch Fill Event - A method optimizes a fill event of an apply chamber of a fluid-actuated clutch, and includes determining input values describing the fill event, and then estimating a fill time using the input values. The method includes filling the apply chamber using the estimated fill time (EFT) or within an allowable range of the EFT. The input values can include a command line pressure, command fill stroke pressure, and an estimated viscosity of the fluid, although other values can be used. The input values are processed through a neural network having an input layer, an optional hidden layer, and an output layer. An assembly includes a fluid-actuated clutch having an apply chamber and a controller operable for estimating the fill time required for filling the apply chamber, and for controlling the fill of the apply chamber within the EFT. | 01-28-2010 |
| 20080264754 | HYDRAULIC CLUTCH DEVICE - A clutch actuation mechanism having a plurality of friction plates engaged with a clutch outer and a clutch inner in a relatively non-rotatable manner and arranged alternately between a bearing plate portion and a pressing plate portion. A clutch disengage/engage control mechanism for switching disengagement/engagement of the clutch actuation mechanism. A clutch piston having opposite sides facing toward a control hydraulic chamber and a hydraulic canceler chamber. A division wall member forming the hydraulic canceler chamber between the division wall member and the clutch piston for forming an oil passage, which introduces lubricating oil toward the friction plates, in cooperation with the clutch inner. A control hydraulic chamber, hydraulic canceler chamber, and division wall member are arranged within a range corresponding to the space between the outer surfaces of a bearing plate portion and pressing plate portion and radially inward of a clutch actuation mechanism. | 10-30-2008 |
| 20080296123 | Powershift Transmission Clutch System With A Predetermined Running Clearance - A simplified and improved clutch piston, retractor system is provided for controlling the running clearance of clutch plate(s) to minimize windage loss and to improve transmission shift quality. This improved shift quality helps improve operator's comfort reduce shock loads on power transmission components, and reduce the energy input to the clutches when changing gears during the acceleration and deceleration of the vehicle. The clutch piston retractor system is self adjusting to accommodate wear to the clutch disks and optimize the shift quality, while compensating for the additional travel distance. Thus, the need to periodically recalibrate the entire system is eliminated. | 12-04-2008 |
| 20090014274 | AUTOMATIC TRANSMISSION CLUTCH HAVING A ONE-PIECE RESIN BALANCER - A clutch assembly for use in an automatic transmission of a motor vehicle includes a drum movable about a rotational axis and having a generally annular recess for supporting components of the clutch assembly therein. A clutch pack is supported in the recess in the drum. A clutch piston is movably coupled to the drum and movable in a generally axial direction between engaged and disengaged positions relative to the clutch pack. At least one biasing spring continuously biases the clutch piston toward the disengaged position. A resin balancer plate has a side wall in contact with one end of the at least one biasing spring. The side wall is reinforced by a box section formed by: an outer wall that extends at an angle from one end of the side wall, an inner wall that extends from an opposite end of the side wall and is stepped in an axial direction toward the clutch piston, and a reinforcing rib interconnecting the side wall, outer wall and inner wall. An integral lip extends from an outer end of the balance plate to form a seal with the clutch piston. | 01-15-2009 |
| 20090032366 | PISTON FOR AUTOMATIC TRANSMISSION - To satisfy sealing ability and separation load between a seal ring and a piston main body | 02-05-2009 |
| 20090038906 | SEAL INTEGRAL TYPE PISTON - To maximize pressing area of a clutch pressing portion ( | 02-12-2009 |
| 20090038907 | CANCEL PLATE - In order to prevents a crack from being generated in an end portion of stoppers ( | 02-12-2009 |
| 20090250309 | Hydraulic Shift System for Power Transfer Devices - A power transfer device includes a shift collar moveable between a first position and a second position, a rotatable member, a rotary to linear movement conversion mechanism interconnecting the rotatable member and the shift collar, and a hydraulic actuator operable to drive the rotatable member. The actuator includes a vane rotatably moveable within a cavity formed in a housing and a pump selectively providing pressurized fluid acting on the vane. The vane is fixed for rotation with the rotatable member such that rotation of the vane causes the shift collar to axially translate. | 10-08-2009 |
| 20080202886 | Pressure-Regulated Friction Clutch - A pressure-regulated friction clutch is provided including a cylinder-piston unit, operated by a pressure medium, which permits a frictional connection of an output shaft with a driven plate fixed thereto and an input shaft with a driving plate fixed thereto, for the transmission of a torque from the input shaft with a permanently pressurized cylinder-piston unit. | 08-28-2008 |
| 20090014273 | Clutch System - A clutch system may include in certain embodiments a clutch body attached to a drive member such as a drive pulley, wherein the clutch body may be removed from the drive member without disassembling the clutch body. In various embodiments, the clutch body may include two clutch plates which enclose a spring-loaded pneumatic reciprocating assembly that in operation causes the plates to selectively separate and engage one another. In certain embodiments, the clutch body may be readily attached to a associated drive pulley in a single step by installation of a single set of fasteners. | 01-15-2009 |
| 20090050437 | CLUTCH DEVICE - A wet type multiple disc clutch | 02-26-2009 |
| 20100044184 | Automatic transmission - An automatic transmission includes first and second clutches, a clutch drum, a piston, a plurality of friction plates, a hydraulic oil chamber, a cancel oil chamber, a return spring, and a cancel plate, wherein a plate member that forms a cylinder portion of the hydraulic oil chamber is provided between the piston and the clutch drum of the first clutch that is located on an inner diameter side, and an oil passage that supplies an oil to the cancel oil chamber of the second clutch that is located on an outer diameter side is formed between the clutch drum and the plate member. | 02-25-2010 |
| 192085000 | Centrifugal fluid clutches | 2 |
| 20080202887 | Adjustment Device for Motorcycle Master Cylinders - An adjustment device ( | 08-28-2008 |
| 20080217134 | Process for pressure actuation of a shifting element - The invention concerns a process for pressure actuation of a rotating shifting element of an automatic transmission or automated manual transmission, in which the shifting element is configured with a piston that interacts with a torque transfer element and a pressure medium supply, by way of which the piston can be actuated with pressure medium in order to be displaced into a positioned defined for an activated state of the shifting element, and in which a pressure pulse can be induced in the pressure medium supply in a de-activated state of the shifting element. It is proposed that the pressure medium pulse be triggered when the pressure medium amount drained from the de-activated shifting element has reached a predefined value. | 09-11-2008 |
| 20080251347 | Piston for hydraulic clutch - For incremental sealing performance and cost reduction, a piston comprises a piston main body ( | 10-16-2008 |
| 20080277239 | Motor Vehicle Hydraulic Pump - A motor vehicle hydraulic pump ( | 11-13-2008 |
| 20080277240 | Driving force transmitting device - A driving force transmitting devices is able to engage a main clutch with a small amount of hydraulic pressure. The driving force transmitting device includes an input shaft and an output shaft, and a main clutch. The device is formed of a primary clutch that intermittently transmits the driving force transmitted from the input shaft, a hydraulic pump that generates a hydraulic pressure, a piston that presses the primary clutch by the hydraulic pressure by the hydraulic pump, and a cam mechanism that presses the main clutch with a press-contact force amplified more than the press-contact force of the piston by utilizing the driving force from the input shaft through the primary clutch, so as to engage the main clutch. | 11-13-2008 |
| 20080283355 | Hydraulic system for a vehicle - A hydraulic system for actuating a clutch of a vehicle, in particular a commercial vehicle, having a pressure reducing valve under system pressure for pressuring the clutch with an actuating pressure in normal operation, where at least one additional reserve valve assembly is provided for emergency operation. In addition, a hydraulic system is proposed for actuating a variator of a CVT transmission of a vehicle, in particular a commercial vehicle, having at least one pressure reducing valve for pressuring a first shifting chamber and a second shifting chamber of the pulleys with an adjusting pressure to set a transmission ratio in normal operation, where at least one selector valve is connected to the first shifting chamber and the second shifting chamber of the respective pulleys. | 11-20-2008 |
| 20080296124 | Hydraulic System in Motor Vehicles - A hydraulic system in motor vehicles with at least one hydraulically actuated clutch, which entails minimized control complexity for supplying the clutch with hydraulic oil and which takes up less structural space. These characteristics are achieved essentially in that the pressure control of the hydraulically actuated clutch is effected directly and exclusively by an electrically driven and electronically controlled oil pump. | 12-04-2008 |
| 20090014275 | Clutch System with a Hydraulically Actuated Clutch Device - A clutch system has a clutch device, an actuating device for the hydraulic actuation of the clutch device, and a hydraulic system. The hydraulic system includes a master cylinder that is actuated by the actuating device, a slave cylinder for actuating the clutch device fluidically connected with the master cylinder through a pressure line. A first branch line is connected to the pressure space of the master cylinder or between the pressure spaces of the master cylinder and slave cylinder. The first branch line is also connected to a compensating tank volume. A second branch line is connected to the pressure space of the slave cylinder or arranged between the pressure spaces of the master and slave cylinders. The second branch line is also connected to the compensating tank volume. A device is disposed to blocking the second branch line during an actuation of the clutch device by way of the actuating device. This provides for an inherently safe, self-ventilating hydraulic system. | 01-15-2009 |
| 20090038908 | Friction clutch having a hydraulic actuator, and drive unit having at least one such friction clutch - The invention relates to a friction clutch having a single-acting actuator which is a piston-cylinder unit and is connected in a controllable fashion to a pressurized fluid source. In order to be able to carry out a fast pilot stroke up to the point at which the clutch makes contact, the piston-cylinder unit has a stepped piston whose first step of small diameter delimits, by means of its cylinder, a first pressure space, and whose second step of relatively large diameter delimits, by means of its cylinder, a second pressure space, a pressure line being connected to the first pressure space and, by means of a first non-return valve which opens at a certain pressure, to the second pressure space, and it also being possible for the second pressure space to be connected via a discharge line and a suction line, which contains a second non-return valve, to the fluid reservoir. The invention also relates to a drive device having clutches of said type. | 02-12-2009 |
| 20090045028 | Clutch Actuation System with Locking Mechanism and Method of Controlling Engagement of a Clutch - A clutch actuation system for engaging and disengaging a clutch includes a hydraulically-actuated piston movable in response to hydraulic pressure to an apply position in which the piston is operable to engage the clutch. An electro mechanical actuator is movable in response to electric power to contact the piston at the apply position such that the clutch is maintained in an engaged state by the actuator, thereby permitting hydraulic pressure to be released. A method of controlling engagement of the clutch is also provided. | 02-19-2009 |
| 20090057092 | CLUTCH HYDRAULIC SYSTEM FOR VEHICLE AND HYDRAULIC SYSTEM - A clutch hydraulic system for a vehicle wherein it is possible to independently operate two systems, to increase the degree of freedom in designing, and to achieve a reduction in cost. A seesaw member for transmitting motive power is provided between a second release cylinder and a first master cylinder, the first master cylinder and a second hydraulic oil pipe communicate with each other through a large diameter hole and a small diameter hole provided as communicating passages through which oil flows. A reservoir tank is provided for reserving the oil for controlling the amounts of the oil in the hydraulic oil passage on the side of the first master cylinder and the amount of the oil in the hydraulic oil passage on the side of the second release cylinder is connected to a second master cylinder. | 03-05-2009 |
| 20090127061 | METHOD OF FEEDING A CLUTCH CYLINDER OF A HYDRAULICALLY ACTUATED CLUTCH SYSTEM - A method of feeding a clutch cylinder in a hydraulically actuated clutch system in a motor vehicle and a respective hydraulically actuated clutch system are suggested. The clutch system comprises at least one clutch that can be closed by filling the clutch cylinder; and a hydraulic system that provides a system pressure and has a clutch control valve having an inlet and an outlet. A system pressure is applied at the inlet of the control valve; the clutch pressure for actuating the clutch is provided at the outlet; and the system pressure is decreased pressure prior to and during the filling of the clutch cylinder. The decreased system pressure allows a high volume flow and therefore a fast filling of the clutch cylinder without establishing a premature torque transmitting capacity in the clutch. | 05-21-2009 |
| 20090139826 | MOTORCYCLE-USE POWER UNIT - In a motorcycle-use power unit in which a clutch device arranged in a power transmission path between a crankshaft and a drive wheel is housed in a clutch chamber which is defined between a crankcase and a clutch cover joined to a side surface of the crankcase, the maintenance of the clutch control device can be easily performed while preventing a lowering of oil-pressure transmission efficiency between the clutch device and the clutch control device and preventing an increase in the weight of the motorcycle. A clutch control device performs a changeover of engagement and disengagement of a clutch device by controlling the oil pressure applied to the clutch device. Oil passages for connecting the clutch control device and the clutch device with each other are mounted on a clutch cover. | 06-04-2009 |
| 20090139827 | Clutch control device - A clutch control device for controlling the operation of a hydraulically operated clutch with a flow control valve. The control device includes a volume flow regulating valve that enables both volume flow regulated filling and volume flow regulated emptying of a hydraulic clutch positioning element, to provide rapid and precise operation of the clutch. | 06-04-2009 |
| 20090166147 | Road vehicle integrated clutch-transmission assembly - An integrated clutch-transmission assembly for a road vehicle; the integrated clutch-transmission assembly has a power-assisted clutch having a number of first hydraulic actuators; a power-assisted transmission having a number of second hydraulic actuators; a high-pressure pump for the hydraulic actuators; a number of solenoid valves for controlling the hydraulic actuators; a housing having a first chamber housing the clutch, and a second chamber housing the transmission; and a flat supporting plate, which is housed removably inside the housing to separate the two chambers of the housing, has a first wall fitted with the clutch, and has a second wall parallel to and opposite the first wall and fitted with the high-pressure pump and at least some of the solenoid valves. | 07-02-2009 |
| 20090205925 | Clutch for Torque Transmission Between a Shaft and a Roller which is Arranged Coaxially Around the Shaft - The present invention relates to a clutch ( | 08-20-2009 |
| 20090250310 | TRANSMISSION APPARATUS COMPRISING AT LEAST ONE POSITIVE SHIFTING ELEMENT HYDRAULICALLY ACTUATED BY WAY OF A HYDRAULIC SYSTEM - A transmission apparatus ( | 10-08-2009 |
| 20090266671 | CLUTCH OPERATION MECHANISM - A clutch operation mechanism wherein when a clutch is disengaged and engaged by manual operation or by operation of an actuator the one operation does not affect the other operation. The clutch operation mechanism includes a lever side lost mechanism which is disposed between a clutch lever and a turn-operating force transmitting member for interrupting, from the clutch lever side, an operated-force applied from the turn-operating force transmitting member by driving the electric motor when the clutch lever is not operated. A motor side lost mechanism is disposed between the electric motor and the turn-operating force transmitting member and interrupts, from the side of the electric motor, the operated-force applied from the turn-operating force transmitting member by operating the clutch lever when the electric motor is not operated. | 10-29-2009 |
| 20100018833 | System and Method for Controlling a Clutch Fill Event - A method optimizes a fill event of an apply chamber of a fluid-actuated clutch, and includes determining input values describing the fill event, and then estimating a fill time using the input values. The method includes filling the apply chamber using the estimated fill time (EFT) or within an allowable range of the EFT. The input values can include a command line pressure, command fill stroke pressure, and an estimated viscosity of the fluid, although other values can be used. The input values are processed through a neural network having an input layer, an optional hidden layer, and an output layer. An assembly includes a fluid-actuated clutch having an apply chamber and a controller operable for estimating the fill time required for filling the apply chamber, and for controlling the fill of the apply chamber within the EFT. | 01-28-2010 |
| 20080264754 | HYDRAULIC CLUTCH DEVICE - A clutch actuation mechanism having a plurality of friction plates engaged with a clutch outer and a clutch inner in a relatively non-rotatable manner and arranged alternately between a bearing plate portion and a pressing plate portion. A clutch disengage/engage control mechanism for switching disengagement/engagement of the clutch actuation mechanism. A clutch piston having opposite sides facing toward a control hydraulic chamber and a hydraulic canceler chamber. A division wall member forming the hydraulic canceler chamber between the division wall member and the clutch piston for forming an oil passage, which introduces lubricating oil toward the friction plates, in cooperation with the clutch inner. A control hydraulic chamber, hydraulic canceler chamber, and division wall member are arranged within a range corresponding to the space between the outer surfaces of a bearing plate portion and pressing plate portion and radially inward of a clutch actuation mechanism. | 10-30-2008 |
| 20080296123 | Powershift Transmission Clutch System With A Predetermined Running Clearance - A simplified and improved clutch piston, retractor system is provided for controlling the running clearance of clutch plate(s) to minimize windage loss and to improve transmission shift quality. This improved shift quality helps improve operator's comfort reduce shock loads on power transmission components, and reduce the energy input to the clutches when changing gears during the acceleration and deceleration of the vehicle. The clutch piston retractor system is self adjusting to accommodate wear to the clutch disks and optimize the shift quality, while compensating for the additional travel distance. Thus, the need to periodically recalibrate the entire system is eliminated. | 12-04-2008 |
| 20090014274 | AUTOMATIC TRANSMISSION CLUTCH HAVING A ONE-PIECE RESIN BALANCER - A clutch assembly for use in an automatic transmission of a motor vehicle includes a drum movable about a rotational axis and having a generally annular recess for supporting components of the clutch assembly therein. A clutch pack is supported in the recess in the drum. A clutch piston is movably coupled to the drum and movable in a generally axial direction between engaged and disengaged positions relative to the clutch pack. At least one biasing spring continuously biases the clutch piston toward the disengaged position. A resin balancer plate has a side wall in contact with one end of the at least one biasing spring. The side wall is reinforced by a box section formed by: an outer wall that extends at an angle from one end of the side wall, an inner wall that extends from an opposite end of the side wall and is stepped in an axial direction toward the clutch piston, and a reinforcing rib interconnecting the side wall, outer wall and inner wall. An integral lip extends from an outer end of the balance plate to form a seal with the clutch piston. | 01-15-2009 |
| 20090032366 | PISTON FOR AUTOMATIC TRANSMISSION - To satisfy sealing ability and separation load between a seal ring and a piston main body | 02-05-2009 |
| 20090038906 | SEAL INTEGRAL TYPE PISTON - To maximize pressing area of a clutch pressing portion ( | 02-12-2009 |
| 20090038907 | CANCEL PLATE - In order to prevents a crack from being generated in an end portion of stoppers ( | 02-12-2009 |
| 20090250309 | Hydraulic Shift System for Power Transfer Devices - A power transfer device includes a shift collar moveable between a first position and a second position, a rotatable member, a rotary to linear movement conversion mechanism interconnecting the rotatable member and the shift collar, and a hydraulic actuator operable to drive the rotatable member. The actuator includes a vane rotatably moveable within a cavity formed in a housing and a pump selectively providing pressurized fluid acting on the vane. The vane is fixed for rotation with the rotatable member such that rotation of the vane causes the shift collar to axially translate. | 10-08-2009 |
| 20080202886 | Pressure-Regulated Friction Clutch - A pressure-regulated friction clutch is provided including a cylinder-piston unit, operated by a pressure medium, which permits a frictional connection of an output shaft with a driven plate fixed thereto and an input shaft with a driving plate fixed thereto, for the transmission of a torque from the input shaft with a permanently pressurized cylinder-piston unit. | 08-28-2008 |
| 20090014273 | Clutch System - A clutch system may include in certain embodiments a clutch body attached to a drive member such as a drive pulley, wherein the clutch body may be removed from the drive member without disassembling the clutch body. In various embodiments, the clutch body may include two clutch plates which enclose a spring-loaded pneumatic reciprocating assembly that in operation causes the plates to selectively separate and engage one another. In certain embodiments, the clutch body may be readily attached to a associated drive pulley in a single step by installation of a single set of fasteners. | 01-15-2009 |
| 20090050437 | CLUTCH DEVICE - A wet type multiple disc clutch | 02-26-2009 |
| 20100044184 | Automatic transmission - An automatic transmission includes first and second clutches, a clutch drum, a piston, a plurality of friction plates, a hydraulic oil chamber, a cancel oil chamber, a return spring, and a cancel plate, wherein a plate member that forms a cylinder portion of the hydraulic oil chamber is provided between the piston and the clutch drum of the first clutch that is located on an inner diameter side, and an oil passage that supplies an oil to the cancel oil chamber of the second clutch that is located on an outer diameter side is formed between the clutch drum and the plate member. | 02-25-2010 |
