A hybrid module for a motor vehicle for coupling an internal combustion engine includes a disconnect clutch, an electrical machine, a clutch, a dry space and a wet space, and a seal. The disconnect clutch is for transmitting a first torque from the internal combustion engine to the hybrid module, and disconnecting the hybrid module from the internal combustion engine. The electrical machine is for generating a drive torque and includes a rotor. The clutch is for transmitting a second torque from the electrical machine or the disconnect clutch to a drivetrain. The seal is for sealing off the dry space with respect to the wet space. A one of the disconnect clutch or the clutch is a dry clutch in the dry space and the other of the disconnect clutch or the clutch is a wet clutch in the wet space.

A double clutch unit for a transmission, having an outer clutch pack and an inner clutch pack each having a clutch pack input and a clutch pack output, wherein a clutch unit input hub rotationally fixed to the outer clutch pack input side and the inner clutch pack input side, a clutch unit inner output hub attached in fixed rotational relation to the outer clutch pack output side, a clutch unit outer output hub attached in fixed rotational relation to an inner clutch pack output side, and an oil distributor rotationally fixed to the inner clutch pack input side, are axially slidable relative to a stator, and a spring-loaded bolt is attached to the engine side of a clutch unit inner power output shaft maintaining the inner output hub, clutch unit outer output hub and oil distributor in axial alignment with respect to the stator.

Disclosed is a double concentric clutch for a transmission having a power flow to both clutches that extends around an outer drive drum, and for an inner via an oil distributor. Parts are assembled using splines, and axial movements are limited using retaining rings which increases ease of assembly and disassembly.

A hybrid drivetrain having an internal combustion engine which is designed for a maximum internal combustion engine rotational speed; a dual-clutch arrangement which has a first friction clutch and a second friction clutch with a common input element and in each case one output element; a transmission arrangement which has a first sub-transmission and a second sub-transmission; an electric machine connected to the output element of the second friction clutch via a machine transmission ratio (i.sub.M), in such a way that a purely electric driving mode can be established via the second sub-transmission. The electric machine is designed for a maximum machine rotational speed. The maximum machine rotational speed divided by the machine transmission ratio is greater than the maximum internal combustion engine rotational speed. The output element of the second friction clutch is structurally designed for the maximum machine rotational speed divided by the machine transmission ratio (i.sub.M).

A transmission system (10), especially for a motor vehicle, having around an axis (O) at least an input shell (12) that is rotationally connected to a driving shaft and to a drive web (18) in order to rotationally connect said input shell (12) to a double wet clutch mechanism (20) that, having at least a first clutch (E1) and a second clutch (E2) respectively of the multiple-disc type, is controlled to selectively couple said driving shaft to a first driven shaft (A1) and to a second driven shaft (A2), wherein the input shell (12) and the drive web (18) are rotationally connected by connecting means (24), which are constituted in particular by rivets (25), with zero angular clearance.

A method and a device for operating a drive train of a motor vehicle are provided. The drive train includes at least a first and a second shaft, a first clutch having at least one first friction surface pairing, and an electric drive, the first and the second shaft being coupleable to one another via the at least one first friction surface pairing, wherein for cooling the first clutch, a fluid is used via which a drag torque of the first clutch is influenced after the first clutch is disengaged, the method including: a) Rotating the first shaft and the second shaft when the first clutch is at least partially engaged; b) Disengaging the first clutch; c) Accelerating the first shaft by means of the electric drive and discharging the fluid from an area of the at least one first friction surface pairing;
wherein the drag torque of the first clutch is reduced by the accelerated discharge of the fluid.

A dual clutch unit includes an outer disk carrier rotationally driven about a rotation axis, first and second inner disk carriers, first and second disk packs for torque transmission between the outer disk carrier and the respective inner disk carrier, wherein the first and second inner disk carriers are arranged rotatably relative to each other about the rotation axis, a central oil supply to supply the first and second disk packs with coolant, a first distributor channel being formed in the first inner disk carrier and comprising a feed opening through which the first distributor channel is fluidly connected to the central oil supply, a second distributor channel being formed in the second inner disk carrier and being fluidly connected to the central oil supply via the first distributor channel, and drain channels being formed in the inner disk carriers to conduct the coolant into the disk packs.

A dry-plate clutch (single or dual) of inverted construction for a vehicle transmission includes a clutch structure with a connecting device arranged to be connected to a prime mover; a pressure plate rotationally fixed and axially displaceable relative to the clutch structure, and a driven disc connected to a driven shaft and located between the clutch structure and the pressure plate. An actuator is arranged to displace the pressure plate between an engaged state, where the driven disc is clamped between the clutch structure and the pressure plate, and a disengaged state, where the disc is rotatable relative to the clutch structure. The connecting device has hollow sections at a number of angular locations extending into a radial surface facing the pressure plate. The pressure plate has corresponding axially extending protrusions in a radial surface facing the connecting device; and the protrusions at least partially extend axially into the hollow sections in the disengaged state.

A hybrid module for a motor vehicle for coupling an internal combustion engine includes a disconnect clutch, an electrical machine, a dual-clutch device, a disconnect clutch actuating system, a first actuating system, and a second actuating system. The disconnect clutch is for transmitting a first torque from the internal combustion engine to the hybrid module and disconnecting the hybrid module from the internal combustion engine. The dual-clutch device includes a first partial clutch and a second partial clutch. The disconnect clutch actuating system is for actuating the disconnect clutch. The first actuating system is for actuating the first partial clutch. The second actuating system is for actuating the second partial clutch. The disconnect clutch actuating system, the first actuating system, and the second actuating system are arranged next to one another in an axial direction.

A clutch mechanism is configured to be driven in rotation about an axis and includes two assemblies. Each assembly includes: an outer disk carrier externally delimiting a cavity; a clutch including a stack of coupling disks and friction disks, the stack being housed in the cavity and configured to be driven in rotation about the axis; and a reaction member of the outer disk carrier configured to enable compression of the coupling disks against the friction disks in a clutch engaged position of the corresponding clutch. The clutch mechanism includes at least one device for assembling the two assemblies to one another.