Abstract: A synchronizer (10) for a gear transmission has a synchronizer body (12), which is associated to a transmission shaft, and a first and a second synchronizer ring (32, 34, 36, 38) which are associated to a first and a second transmission gear (28, 30). Furthermore, the synchronizer (10) has a sliding sleeve (26) and at least one thrust piece (18) which is shiftably arranged on the synchronizer body (12) and can exert an axial compressive force on the corresponding synchronizer ring (32, 34, 36, 38). Furthermore, the synchronizer (10) includes an elastic actuating element (20) which is active between the sliding sleeve (26) and the thrust piece (18), wherein on the sliding sleeve (26) a detent recess (50) for the neutral position as well as a release contour (54) are provided.

Abstract: The invention relates to a transmitter (18) for a synchronizing assembly of a manual transmission, having a thrust piece (42), a spring (44; 84) that cooperates with the thrust piece (42), and at least one synchronizer ring (30), the thrust piece (42) being acted upon by the spring (44) such that the transmitter (18) can transmit a pre-synchronizing force to the synchronizer ring (30) in the axial direction.

Abstract: A synchronization device for a transmission includes a sliding sleeve, a blocking synchronizer ring and a change wheel. In a force flow region between the blocking synchronizer ring and the change wheel, ramps for producing a servo force axial with respect to the shaft are provided on at least one component part.

Abstract: A shifting device for a gearbox which has at least one sliding sleeve that is placed on a transmission shaft in a rotationally fixed and axially movable manner. One idler gear, which is rotationally supported on the transmission shaft, is located at on one side adjacent the sleeve. The sliding sleeve can be axially moved, by an actuating element, from a neutral position into a shifting position toward the idler gear, and upon reaching the shifting position, couples the idler gear with the transmission shaft. The associated actuating elements are arranged in a stationary manner and, upon actuation, engage with at least one shifting groove, provided on an outside diameter of the at least one sliding sleeve and has a curve-shaped path, in the axial direction, so that rotation of the transmission shaft axially shifts the sliding sleeve according to the further path of the shifting groove.

Abstract: A transmission is disclosed having an input shaft or member, an output shaft or member, a plurality of meshing gears, a plurality of synchronizers and a reverse idler gear assembly. The reverse idler gear assembly includes an idler gear member, a synchronizer member and a retainer member. The synchronizer member has a pair of tabs that engage grooves on an idler shaft and interface with a synchronizer spring to apply a force from the synchronizer member on the retainer member and create a braking friction to slow down the idler gear assembly and the input shaft prior to meshing with the gear of the output shaft.

Abstract: A method for detecting damage done to a clutch having at least two components that transfer torque by frictional engagement comprises the following steps: determining the friction power L introduced into the friction surfaces of the components by slippage between the torque-transferring components, calculating an individual damage value ESW=f(L,t), wherein t denotes time, and rating the clutch as damaged when ESW exceeds a predetermined value.

Abstract: A synchronizer for first and second drives is provided which includes a first drive having a first fluid passage, a hub affixed with the first drive having a second fluid passage connected with the first fluid passage, a piston mounted on the hub forming a control volume between the piston and the hub, the control volume intersecting the second passage, the piston being responsive to fluid pressure within the control volume, a friction member rotated with the hub being moved by the piston and a friction surface rotating with the second drive member for engagement with the friction member to synchronize the first and second drives together, first teeth rotating with the hub being moved by the piston, and second teeth rotating with said second drive member.

Abstract: A friction coupling for locking a shaft relative to a hub is disclosed. The friction coupling includes a radially deformable inner sleeve, a radially deformable outer sleeve, an annular piston which is axially movable relative to the inner sleeve and the outer sleeve, the annular piston having a conical surface, which cooperates with the inner sleeve and/or the outer sleeve and which is arranged to deform the inner sleeve and/or the outer sleeve when the annular piston is moved relative to the inner sleeve and the outer sleeve so as to provide the locking. In at least one embodiment, the friction coupling further includes at least one actuating device to produce a movement of the annular piston for locking the friction coupling, and at least one deactuating device to produce a movement of the annular piston for unlocking the friction coupling. The at least one actuating and deactuating devices are located, seen in the axial direction, on the same side of the annular piston.

Abstract: The synchronizer apparatus have a hub set on the shaft, a sleeve supported at the outside of the hub and engaged together, a sift gear with a clutch gear engageable with the sleeve, a synchronizer ring with friction surface, the lever members multiplying a force from the sleeve by using leverage and transmitting its multiplied force to the synchronizer ring. The lever members are disposed in a cut-off portions of the hub. Therefore, the apparatus become compact, eliminating a space for setting the lever members, and minimize the effect on a shift operation force, for the lever members are formed slmall to reduce the centrifugal force acting on them.

Abstract: A pin-type synchronizer core formed from a flat piece of steel material. An annular disc is formed into a core member with a U-shaped channel and pockets.

Abstract: The invention relates to a synchronizer clutch (1) comprising a sliding sleeve (17) with selector teeth (19), two synchronizing rings (28, 29) with locking teeth (30, 31) and friction surfaces (24, 25) situated on both sides of the sliding sleeve (17) and rotatable around a limited rotation angle, and two clutch bodies (20, 21) with coupling teeth (22, 23) and counter friction surfaces (26, 27) interacting with the synchronizing rings (28, 29) wherein the sliding sleeve (17) is constantly connected with a transmission element (3) by a sleeve guide (3) so as to be torsionally resistant and, when engaged, is connected with one of the clutch bodies (20, 21) with positive fit by the selector teeth (19) and the coupling teeth (22, 23).

Abstract: The invention concerns a clutch (1) comprising a sliding sleeve (17) with selector teeth (19), two synchronizing rings (28, 29) situated on either side of the sliding sleeve (17) with locking teeth (30, 31) and friction surface (24, 25) which can be turned about a limited rotation angle in relation to the sliding sleeve (17) and two clutch bodies (20, 21) with clutch teeth (22, 23) and counter friction surface (26, 27), the clutch bodies (20, 21) interacting with the synchronizing rings (28, 29) wherein the sliding sleeve (17) is constantly connected with a gear element (3) in a way torsionally resistant and when engaged is connected to one of the clutch bodies (20, 21) via the selector teeth (19) and the clutch teeth (22, 23) with positive fit.