Abstract: A disc carrier of a friction clutch is described and illustrated, and in some embodiments has a subassembly of a modular structure which is composed of interconnectable component parts. The component parts can include a holding ring, at least one web, and a base plate.

Abstract: A method of producing an organic friction lining includes the steps of producing a liquid friction material pulp placing a fabric into the friction material pulp drying and saturating the friction material pulp together with the fabric placed therein and removing the fabric from the dried friction material.

Abstract: A clutch pressure control device includes a request filter unit that calculates a target clutch pressure value from a requested clutch pressure value input in the request filter unit. A feedforward clutch pressure control model unit calculates, from the target clutch pressure value input by the request filter unit, a feedforward current value. A PID control unit calculates a feedback current value from a valve pressure target value for a hydraulic proportional valve controlling the clutch pressure and a feedback actual pressure value. A first calculation unit calculates a hydraulic proportional valve target current value from the input feedforward current value and the feedback current value. The device utilizes measurement methods to find values for a kisspoint pressure of the clutch, a preload pressure of the clutch, and a fill volume of the clutch.

Abstract: A double clutch of a double clutch transmission is described and illustrated, and can include an inner clutch which is connected to an inner shaft and has an inner disk carrier for inner disks; an outer clutch which is connected to a hollow shaft arranged co-axially with respect to the inner shaft and has an outer disk carrier for outer disks; and a drive member arranged on a drive shaft and having inner and outer drive disks which can be operatively connected to the inner or outer disks and which form an inner clutch pack or an outer clutch pack together with the disks; wherein a common disk carrier for both clutch packs is attached to the drive member; the disk carrier includes two hubs associated with the clutch packs and engaged within one another; and each hub comprises a plurality of teeth.

Abstract: A motorcycle clutch for a drive connection between an engine and a transmission of a motorcycle is provided, and is some embodiments includes a manually operable clutch lever, engaging inner and outer disks, and a disengaging mechanism operable by means of the clutch lever for a pressure body which is spring-loaded by at least one clutch spring assembly for pressurization of the inner and outer disks, wherein a servo mechanism for reducing the operating force of the clutch lever is provided, the servo mechanism being effectively connected to the intake section of the engine and utilizing the negative intake pressure in the intake section to build up a servo force acting against the direction of the spring load of the clutch spring assembly.

Abstract: A DCT hydraulic power control system has a pump, a high pressure section for providing oil to actuators of the DCT, a low pressure section for providing oil to a lubrication and cooling system of the DCT, and a regulator for directing excess oil from the high pressure section to the lubrication and cooling section. A hydraulic control includes a first directional valve disposed in a main line of the low pressure section between the pump and the lubrication and cooling system, wherein the directional valve is controlled by an ON/OFF valve disposed between a check valve and the directional valve, wherein the check valve is disposed in a branch line of the low pressure section leading to the high pressure section, and wherein a second directional valve connects the second pressure outlet associated to the low pressure section with a suction side of the pump.

Abstract: A vehicle clutch, particularly motorcycle clutch, is provided comprising a friction system; an engaging member acting on the friction system; and a spring adapted to be brought into operative communication with the engaging member via a bearing, wherein the engaging member is subdivided into an inner part and an outer part which is rotatable relative to the inner part by a defined turning angle, the spring has a degressive spring characteristic, and the bearing and the inner part are adapted to be brought into operative communication with one another via a surface arrangement constituting an inclined plane.

Abstract: An activation control device for clutch packs of a hydraulic double clutch is described and illustrated, and in some embodiments comprises a first pressure line having a filling valve and leading from an oil pressure source to the first clutch pack; a second pressure line having a filling valve and leading from the oil pressure source to the second clutch pack; and first and second draining valves coupled to the first and second pressure lines, respectively, the first draining valve located between the filling valve of the first pressure line and the first clutch pack, and the second draining valve located between the filling valve of the second pressure line and the second clutch pack.

Abstract: An activation control device for clutch packs of a hydraulic double clutch is described and illustrated, and in some embodiments comprises a first pressure line having a filling valve and leading from an oil pressure source to the first clutch pack; a second pressure line having a filling valve and leading from the oil pressure source to the second clutch pack; and first and second draining valves coupled to the first and second pressure lines, respectively, the first draining valve located between the filling valve of the first pressure line and the first clutch pack, and the second draining valve located between the filling valve of the second pressure line and the second clutch pack.

Abstract: A synchronizing device for shiftable transmissions, comprising a synchronizer which is non-rotatably supported on a gear shaft and which comprises at least one recess for at least one thrust member. A sliding sleeve is arranged on the synchronizer and displaceable in the longitudinal direction of the gear shaft. A sliding wheel is provided for each shiftable gear, which is arranged on the gear shaft and non-rotatably connected to a coupling body. A friction element comprises at least one outer ring for each sliding wheel. An indexing element is arranged on the outer ring for defining the stop position thereof relative to the synchronizer, wherein the indexing element comprises at least one separate stop member arranged above the recess of the thrust member between the synchronizer and the outer ring.

Abstract: The present invention relates to a wrap spring clutch comprising a first shaft; a wrap spring wound around the first shaft in a winding direction and comprising wrap spring ends; and comprising a second hollow shaft arranged around the wrap spring to be concentric to the first shaft, characterized by an actuator for applying a controlled tangential force onto at least one of the wrap spring ends in a direction opposite to the winding direction of the wrap spring.

Abstract: A vehicle clutch, particularly motorcycle clutch, is provided comprising a friction system; an engaging member acting on the friction system; and a spring adapted to be brought into operative communication with the engaging member via a bearing, wherein the engaging member is subdivided into an inner part and an outer part which is rotatable relative to the inner part by a defined turning angle, the spring has a degressive spring characteristic, and the bearing and the inner part are adapted to be brought into operative communication with one another via a surface arrangement constituting an inclined plane.

Abstract: The present invention relates to a gear-change device (1) comprising a transmission housing (2), at least two neighboring gear shafts (3, 4) arranged in the transmission housing, and a respective gear-change sleeve (5, 6) per gear shaft (3, 4), wherein at least one locking element (7; 8) is arranged on a guide means (9) supported on the transmission housing (2), and by displacement of one (5) of the gear-change sleeves (5, 6) the respectively other one (6) of the gear-change sleeves (5, 6) is locked against an axial displacement on the gear shaft (4) thereof out of the neutral position.

Abstract: A frictional coupling, especially synchronization device of gear mechanisms, with at least two coupling bodies (1, 2) which come into frictional contact upon engagement of the coupling, wherein one coupling body consists of one ring-shaped base body (3) of metal with at least one flat, conical or cylindrical carrier surface, to which a frictional layer made of organic or inorganic frictional material (4) is attached, and at least one other coupling body of a counter body (8), preferably also made of metal, and has a counter surface which works together with the frictional layer, is further developed for closed systems such that clamping or damage to the edges can be avoided with continued unimpaired function and the usage in the new condition is facilitated.

Abstract: A friction system moistened by a lubricating oil comprising a pair of friction bodies movable relative to each other along a friction surface. At least one of the friction bodies contains a friction lining having a heat capacity ratio and a heat conductivity ratio which diminish perpendicularly away from the friction surface such that boundary friction and thermal elimination of the lubricating oil ensue at individual friction points of the friction surface, thereby disposing the seizing tendency of the friction bodies and obtaining constant coefficients of friction and low rates of wear.

Abstract: The friction surfaces (4) of two essentially annular friction elements (1) which, through relative motion, can be arranged to transmit torque, are each approximately formed like the surface of a spherical layer whose center (M) is situated on the axis (5) of the annular frictional elements (1) outside the bottom plane of the spherical layer. This is a simple way to ensure a whole-surface, interlocking contact and a good friction performance over a large number of cycles even during a minor tilt of the two cooperating friction surfaces (4).

Abstract: A synchronizing arrangement for a gear transmission includes a synchronizing ring and the surrounding annular spring, the ring having at least three equally spaced support elements at the circumference of the ring at which the spring is snugly supported with a press-fit about the ring. The support elements and the spring define opposing contact surfaces which are relatively adjustable upon assembly of the annular spring about the ring in order to balance manufacturing tolerances.