Abstract: A hydraulic circuit for controlling the application of pressurized cooling fluid to the clutches of a dual clutch transmission including a cooling unit in fluid communication with a source of the pressurized cooling fluid and adapted to exchange heat from the cooling fluid with another media. The circuit also includes at least one regulator in fluid communication with the source of the pressurized cooling fluid and separately in fluid communication with the cooling unit, and with the clutches. The regulator is adapted to operatively provide the cooling fluid to the clutches. The circuit further includes at least one control actuator adapted to selectively control the regulator to provide a first variable predetermined amount of cooling fluid from the cooling unit to the clutches as primary cooling, and to provide a second variable predetermined amount of cooling fluid from the source to the clutches thereby supplementing the cooling fluid from the cooling unit.

Abstract: A transmission has a rotating shaft, a coupling sleeve fixedly coupled to the rotating shaft to rotate with the rotating shaft and a variable speed gear mounted on the rotating shaft. The variable speed gear is configured to rotate on the rotating shaft when a clutch gear that is embedded in a side surface of the variable speed gear is disengaged from the coupling sleeve and to be fixed to the rotating shaft when the clutch gear is engaged from the coupling sleeve. The coupling sleeve is moved in the axial direction between the engaged and disengaged states by a shifting fork F3. A lubricant supplying structure directs lubricant to the clutch gear by diverting the lubricant against a side surface of the shifting fork that faces the clutch gear and a side surface of the coupling sleeve that faces the clutch gear.

Abstract: A torque transfer mechanism for controlling the magnitude of a clutch engagement force exerted on a clutch pack that is operably disposed between a first rotary member and a second rotary member includes a hydraulic clutch actuation system. The hydraulic clutch actuation system includes an electric motor drivingly coupled to a pump. The pump supplies pressurized fluid to an accumulator. The pressurized fluid within the accumulator is selectively supplied to a piston to provide a clutch engagement force.

Abstract: In the starting clutch, an electrical pump or an engine pump is omitted and a substitutive pump mechanism is obtained with a simple construction thereby to circulate lubricating oil within the starting clutch. There is provided a starting clutch in which lubricating oil supplied form a drive shaft side is circulated within the clutch and input side elements and output side elements are tightened by an axial load to transmit a power and wherein a non-electrically operated pump mechanism is provided within the starting clutch.

Abstract: A fluid clutch includes a housing having an interior that can be filled with fluid, an output element that can be rotated relative to the housing, a first friction surface arrangement coupled to the housing, a second friction surface arrangement coupled to the output element, and means for bringing the first and second friction surface arrangements into frictional engagement. A fluid circulation arrangement in the housing causes fluid to circulate around the friction surfaces without requiring a simultaneous exchange of fluid to and from the interior.

Abstract: A band brake drum assembly (50) is provided and includes a brake band member (52), a generally round and/or cylindrical and brake drum (54) which is disposed concentric to band (52), and an input or hub shaft (56 which is fixedly coupled to and rotatably drives drum (54). Drum includes an interior surface having a recessed portion (62) which is effective to retain a certain amount of lubricant or oil within the drum, and several relatively large drainage holes (70) which are effective to quickly drain excess lubricant from drum (54), thereby providing a consistent amount of lubricant wit in drum (54) and improving the overall performance of the brake band assembly.

Abstract: The hydraulic coupling includes a multi-plate clutch assembly operatively connecting a pair of rotary members, an actuator assembly for actuating the clutch assembly, and a fluid control system operable for controlling actuation of the actuator assembly including a hydraulic pump and a piston mounted in a piston chamber for movement relative to the multi-plate clutch assembly. The fluid control system regulates the fluid pressure supplied to the piston chamber by the hydraulic pump to control the clutch engagement force exerted by the piston on the clutch assembly. The fluid control system includes an electrically-controlled flow control valve operable for regulating the fluid pressure delivered to the piston chamber. Preferably, the flow control valve is a pulse-width modulated PWM) valve having a moveable valve element.

Abstract: A vent system for use in a driveline component of an automotive vehicle. The driveline component includes a housing and a bi-directional clutch rotatably supported within the housing. The driveline component includes a vent system which has a vent that is secured to the housing and an orifice within a top portion of the housing. The vent system also includes a recessed pocket formed on an inner surface of the housing at or near the vent. The vent system also includes a grounding element that is arranged within the recessed pocket adjacent to the orifice in the housing of the rear driveline module. The vent system is used to allow for venting of high pressures developed during high speed rotation of driveline modules within a drivetrain system of a automotive vehicle without allowing the expulsion of a lubricating fluid from the oil housing.

Abstract: The automatic transmission for a motor vehicle having one starting element, one input shaft, one output shaft and gear sets for determining the reduction ratio and having one planetary reversing gear for reversal of direction of rotation of the input shaft. In the planetary reversing gear is situated one ring gear consisting of one ring (1) with inner teeth and with a smooth outer wall and of one disc carrier (2) segmentally welded on the ring.

Abstract: A vent system for use in a driveline component of an automotive vehicle. The driveline component includes a housing and a bi-directional clutch rotatably supported within the housing. The driveline component includes a vent system which has a vent that is secured to the housing and an orifice within a top portion of the housing. The vent system also includes a recessed pocket formed on an inner surface of the housing at or near the vent. The vent system also includes a grounding element that is arranged within the recessed pocket adjacent to the orifice in the housing of the rear driveline module. The vent system is used to allow for venting of high pressures developed during high speed rotation of driveline modules within a drivetrain system of a automotive vehicle without allowing the expulsion of a lubricating fluid from the oil housing.

Abstract: A separator plate assembly for a multi-disc clutch has first and second spaced apart plates welded to wire elements positioned therebetween. The wire elements are spaced apart and cooperate with the first and second plates to define generally radially inwardly/outwardly extending flow paths for lubricating/cooling oil. A template is provided for use in assembling the wire elements to the plates.

Abstract: The invention proposes a device using friction in a liquid medium having a support, notably metallic, on which an interface surface forms a support for a friction lining, with a flat annular shape overall, produced from a friction material which has a porous structure with communicating cells and which has areas (M1, M2, M3) with different controlled porosities. The method of manufacturing the friction lining including a step of moulding under pressure, whilst the interface surface of the support has at least one groove in which there extends the friction material moulded under pressure in order to constitute an area of controlled porosity (M1, M2) greater than the mean porosity (M2, M3) of the body made from friction material constituting the lining.

Abstract: A friction device includes a clutch pack operable to connect and disconnect drive and driven members for transferring and interrupting torque therebetween. A piston is supported in the clutch housing and defines a first expandable chamber. The piston carries a control module responsive to pressure in the expandable chamber for controlling coolant flow through a dedicated coolant flow passage through the actuator piston that includes mist-forming outlets on the face of the actuator piston.