Abstract: A hydraulic piston system includes a housing that defines a piston pocket and a fluid inlet. A piston with a peripheral region and an end is movable within the piston pocket of the housing. The end of the piston has peripheral defined channels and a portion structured and arranged to engage the housing to limit travel of the piston. Further, a seal is configured to seal the peripheral region of the piston against the piston pocket. The seal is structured and arranged to receive fluid pressure when the piston is positioned with the portion of the piston is in engagement with the housing and fluid communication exists between the fluid inlet and the seal through the peripheral defined channels.

Abstract: A transmission for a vehicle and a method of assembling the transmission of the vehicle are disclosed. The transmission includes a housing defining a cavity and a recess disposed inside the housing. The recess extends outwardly away from the cavity along a longitudinal axis. The transmission further includes a clutch disposed inside the cavity. In addition, the transmission includes a guide member disposed inside the cavity and defining a first path and a second path spaced from each other. At least one of the first and second paths is in fluid communication with the clutch. The guide member includes a mounting portion disposed in the recess and engaging the housing in an interference fit to secure the guide member to the housing.

Abstract: The present invention relates to a piston-cylinder arrangement (2) for the operating device of a clutch, having a cylinder (16), a piston (36) which is arranged in the cylinder (16) and can be displaced in the axial direction (4, 6), and at least one locking element (50) which is associated with the piston (36), wherein the piston (36) can be displaced from a first position into a second position in which the locking element (50) can be moved from a released position into a locked position in which the piston (36) is locked in the second position via the locking element (50) in a positively locking manner.

Abstract: The present invention relates to a clutch control device, more particularly, to a clutch control device wherein a mechanical section may be miniaturized and operational errors can be reduced using a non-contact type displacement detection system which uses a linear distance sensor for a clutch clearance and the position of the mechanical section can be accurately controlled by using a plurality of solenoid valves.

Abstract: An actuator device for actuating a coupling mechanism or a transmission in a drive wheel in a belt drive or chain drive, includes a shaft, releasably connectable to the drive wheel and at least partially hollow, a push rod connected to the coupling mechanism or transmission and displaceable coaxially to the longitudinal axis of the shaft, a housing having an internal bore for at least partially receiving the shaft, and at least one first bearing disposed in the internal bore of the housing for rotatably supporting the shaft. The actuator device constitutes a fluidic actuator having at least one first pressure chamber capable of being pressurized with a fluid.

Abstract: A drive assembly having an actuating piston for generating a thrust for engagement of a clutch unit. The assembly also has a bearing for transferring the engagement thrust and a pusher for discharging the engagement thrust onto the clutch unit. The actuating piston, the bearing and the pusher are assembled in succession on a transmission shaft carrying the clutch unit. A chamber is provided for supplying a fluid under pressure for generating a disengagement thrust acting on the actuating piston. At least one preloaded spring is provided that acts on the actuating piston so as to push it towards the clutch unit. The bearing for transferring the thrust is mounted with play directly on the transmission shaft. The pusher being disk-shaped and comprising a first face in lateral contact with the bearing and a second face in lateral contact with the clutch unit.

Abstract: A compressor for generating compressed air in a vehicle includes a crankshaft and an interface area for fastening a clutch device by means of which the crankshaft of the compressor can be connected to or disconnected from a drive device. The interface area is configured to receive a crucible-shaped receptacle element. The crucible-shaped receptacle element can be a cylinder for receiving a piston that can be acted on by a pressure medium for actuating the clutch device.

Abstract: A transmission is provided having an input member, an output member, at least four planetary gear sets, coupling members, and torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices include clutches and brakes actuatable in combinations of two to establish at least eleven forward gear ratios and one reverse gear ratio. A clutch assembly for use in an automatic transmission is provided that includes an apply piston and a stationary fluid supply member. The apply piston is configured to rotate during at least one gear speed of the automatic transmission. The stationary fluid supply member has portions forming a channel in the stationary fluid supply member and defining an outlet end of the channel. The stationary fluid supply member is configured to supply fluid to the apply piston through the outlet end of the channel.

Abstract: An assembly includes an output shaft, an input shaft with an internal reservoir, and a clutch. The clutch is adapted to selectively engage and couple the input shaft to the output shaft. The clutch has a pressure chamber that communicates with the reservoir of the input shaft. The reservoir has a sufficient volume to provide the pressure chamber with a fluid pressure adequate to maintain engagement of the clutch during an interruption of a fluid supply to the input shaft and clutch.

Abstract: A novel adjustable slave cylinder is disclosed. The improved slave cylinder is particularly well suited for use with a clutch incorporating an expanding friction disk. The adjustable slave cylinder provides a means for adjusting a clutch pressure plate's position via an adjustment mechanism external to the inside of an engine.

Abstract: A fan drive system is provided having a housing connected with a pulley. A fan shaft is rotatably mounted to the housing by a clutch. A piston actuates the clutch. A pressure tube is provided for delivering pressure to the piston. A valve controls pressure against the piston. A fixed shaft rotatably supports the housing and the pulley and has passages extending through the pulley. A base connects the support shaft to a vehicle structure. An oil plate has inlets and outlets with the shaft passages. The oil plate circulates the hydraulic fluid. A coolant plate is juxtaposed between the oil plate and the structure supporting the support shaft. The coolant plate has inlets and outlets for coolant from a remote cooler.

Abstract: In a driving force transmission apparatus, an oil inlet portion for introducing hydraulic fluid from one of spaces to the other one of the spaces is formed, and an apparatus case has an oil outlet portion for delivering the hydraulic fluid from the other one of the spaces to an outside of the other one of the spaces with an oil delivery capacity lower than an oil introducing capacity of the oil inlet portion. A pressure regulation valve for bringing the oil inlet portion into an open state upon reception of hydraulic pressure higher than or equal to a predetermined pressure from hydraulic fluid is arranged at the oil inlet portion.

Abstract: A seal is for sealing a clearance space between first and second members disposed generally coaxially about an axis, one of the two members being linearly displaceable generally along the axis relative to the other one of the two members. The seal includes a generally annular body coupled with the first member, the body having a centerline generally coaxial with the central axis, a sealing surface extending circumferentially about the axis, and a plurality of projections extending generally radially from the sealing surface and into contact with the second member. The projections are spaced circumferentially about the axis so as to define a separate lubrication gap between each pair of adjacent projections. The body is configured to radially deflect when exposed to at least a predetermined fluid pressure such that recessed sections of the sealing surface extending between the projections contact the second member to substantially obstruct the clearance space.

Abstract: A hybrid driving force transmission device is provided with a multiple-plate dry clutch, a piston, a piston arm, a return spring, bellows elastic seal components and an arm fixing plate. The return spring applies biasing force to the piston arm in the release direction of the clutch, during the release period of the multiple-plate dry clutch. The bellows elastic seal member is secured or maintained in a position on the side wall of a clutch drum and seals a through hole and arm distal end from the clutch chamber, and undergoes an elastic deformation following the stroke movement of the arm distal end. The arm fixing plate is integrally provided with the bellows elastic seal member, is fixed to the arm distal end, and when the multiple-plate dry clutch is engaged, is configured to contact the clutch plate for transferring the clutch engagement force.

Abstract: A drive having an emergency closing function comprises a movable coupling device, which has an emergency spring clamped between an input-side and an output-side spring system. The emergency spring is a compression spring moved along with the coupling device. A distance of the spring systems is defined by a locking device in normal operation of the drive, wherein the emergency spring can relax for an emergency function or emergency movement of the drive after the locking device is released or unlocked. The locking device is operated or triggered hydraulically or pneumatically and/or magnetically.

Abstract: A clutch assembly, including: a secondary piston assembly; a primary piston including a portion located radially outward of the secondary piston assembly; a first chamber at least partially formed by a first side of the primary piston; a second chamber at least partially formed by the secondary piston assembly and a second side of the primary piston; and a check valve connecting the first and second chambers. For a first force applied by fluid in the first chamber: the primary piston remains axially stationary; the fluid flows from the first chamber into the second chamber; and the secondary piston assembly displaces in a first axial direction to contact a clutch pack. For an increase of the first force to a second force: fluid flow between the first and second chambers is blocked by the check valve; and the primary piston and the secondary piston assembly displace in the first axial direction to close the clutch pack.

Abstract: A clutch support for supporting a clutch hub of a clutch such that the clutch hub is rotatable is described. The clutch hub comprises a flange that is fixable at clutch housing or the like; a substantially cylindrical element for receiving the clutch hub such that the clutch hub is rotatable; and a sleeve with at least one groove formed therein for providing at least one channel that allows oil to be supplied to the clutch through this channel. The sleeve is manufactured substantially without any chip removing machining action. This achieves the goal to provide a clutch support that can be manufactured in a simple manner and at comparatively low cost.

Abstract: A piston actuated synchronizer system for a split torque transmission where the piston is attached directly to the synchronizer shift collar on the synchronizer centerline to provide the required actuation in a small volume of space and resolve fork and rod deflection issues seen on other synchronizers that use such a system. The piston is pressure applied and spring released. This design also uses a displacement sensor to monitor synchronizer engagement.

Abstract: A vehicle drive device has an engine, a transmission, a clutch device and a clutch operating mechanism which operates the clutch device to drivingly connect the engine to the transmission. The clutch operating mechanism has a clutch drum secured to the outer circumferential surface of an input shaft of the transmission and holding a second clutch section which is engageable with a first clutch section held on an input member of the clutch device to which a driving power of the engine is transmitted. The clutch drum has a drum chamber, a fixed plate closing an opening of the drum chamber, a piston surrounded by the clutch drum and partitioning the drum chamber into a hydraulic chamber and a spring chamber, and an urging element provided inside the spring chamber to be surrounded by the clutch drum and urging the piston.

Abstract: A centrifugally balanced hydraulic clutch assembly includes a hydraulic chamber configured to rotate about an axis of rotation and a clutch piston that is partially situated within the hydraulic chamber and defines both an apply volume and a release volume. The clutch piston includes an inner surface and an outer surface, where a portion of the outer surface faces the apply volume and defines an apply area, and a portion of the inner surface faces the release volume and defines a release area. Additionally each portion of the apply area is provided at a respective distance from the axis of rotation, and, for each portion of the apply area, there is a corresponding portion of the release area provided at the same radial distance.

Abstract: A device for controlling a rotating shifting element of an automatic transmission for a start/stop operation. The shifting element is actuated by an axially moving piston which is biased, in a disengaging direction, by a spring and biased, in an engaging direction, by hydraulic pressure supplied to a pressure space. At least one spring-loaded latch, which able to move in the radial direction, is arranged in the pressure space. The spring-loaded latch, when the combustion engine is running, rotates with the piston and acts upon the piston such that if the engine stops, the previously engaged shifting element is locked by spring force and, as the pressure decreases, the shifting element disengages slightly, at most only slightly, and when the engine is re-started, the locking action is again released by centrifugal force, in opposition to the spring force, so that the piston remains engaged by the hydraulic pressure build-up in the pressure chamber.

Abstract: 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.

Abstract: A shifting element of an automatic transmission with a shifting element piston that can be hydraulically actuated via an engaging pressure space and with a way of pressure compensation which compensates for dynamic engagement forces that act on the shifting element piston and are produced in the engaging pressure space filled with hydraulic liquid by its rotation. The way of pressure compensation comprising of at least one pressure compensation space that can be fed with pressure compensation liquid in which dynamic compensation forces, directed opposite to the dynamic engagement forces, can be produced by virtue of the rotation. To achieve effective passive compensation of dynamic hydraulic pressures with comparatively little radial structural space occupation, at least two pressure compensation spaces, opposite the engaging pressure space, are arranged in a cylinder space of the shifting element piston axially next to one another.