Abstract: The disclosure relates to a disk (38) for a disk clutch (26) comprising an annular base element (76) which has a toothing (78) with multiple teeth (80) for achieving a rotary driving engagement with a disk carrier (34), wherein the base element (76) has at least one hardened region (96) in which the base element (76) is designed as harder than in the tooth flank regions (98, 100) of the teeth (80). In addition, the disclosure relates to a disk clutch (26) with such a disk (38), a double clutch device (2) with such a disk clutch (26), and a method for producing such a disk (38).

Abstract: An actuating device for shifting stages of a transmission, wherein a displaceable actuator for the manual selection of a shift stage (or driving mode) is provided, which can be adjusted into a plurality of positions. At least some or each of the positions can be assigned necessary conditions for the engagement of a shift stage assigned to the position. If the actuator is displaced into a position for which the conditions necessary for the same are not fulfilled, the associated shift stage is not engaged in the transmission and corresponding first signaling is carried out. Fulfillment of the necessary conditions of the associated shift stage following the displacement of the actuator into the position assigned to the shift stage or following the displacement in the direction of the associated position for the associated shift stage leads to the shift stage in the transmission being engaged.

Abstract: The present invention relates to a disk (38) for a disk clutch (26) comprising an annular base element (76) which has a toothing (78) with multiple teeth (80) for achieving a rotary driving engagement with a disk carrier (34), wherein the base element (76) has at least one hardened region (96) in which the base element (76) is designed as harder than in the tooth flank regions (98, 100) of the teeth (80). In addition, the present invention relates to a disk clutch (26) with such a disk (38), a double clutch device (2) with such a disk clutch (26), and a method for producing such a disk (38).

Abstract: An actuating device for shifting stages of a transmission, wherein a displaceable actuator for the manual selection of a shift stage (or driving mode) is provided, which can be adjusted into a plurality of positions. At least some or each of the positions can be assigned necessary conditions for the engagement of a shift stage assigned to the position. If the actuator is displaced into a position for which the conditions necessary for the same are not fulfilled, the associated shift stage is not engaged in the transmission and corresponding first signaling is carried out. Fulfillment of the necessary conditions of the associated shift stage following the displacement of the actuator into the position assigned to the shift stage or following the displacement in the direction of the associated position for the associated shift stage leads to the shift stage in the transmission being engaged.

Abstract: An installation for the control of a motor vehicle drive unit which includes a reciprocating piston engine, a hydraulically actuated clutch and a transmission. A drive pedal pick-up controls the throttle valve and therewith the engine torque by way of a first characteristic curve converter while it applies a signal by way of a second characteristic curve converter a to a control apparatus, to which is also fed at the same time the engine rotational speed n. The control apparatus forms the product a.multidot.n.sup.2 and applies the same as output signal to the electromagnetic actuating mechanism of the hydraulic clutch so that the pressure thereof and also the torque in the clutch is proportional to the product a.multidot.n.sup.2.