A hybrid drive module for a motor vehicle having an input shaft, an electric machine with a stator fixed with respect to relative rotation and a rotatable rotor, a disconnect clutch in the power flow between the input shaft and the rotor, and a torque converter with a lockup clutch, the housing of the torque converter being connected to the rotor so as to be fixed with respect to rotation relative to it. The disconnect clutch is actuatable in closing direction by pressurization of a first pressure space. The lockup clutch is actuatable in closing direction through pressurization of a second pressure space. The two pressure spaces are defined at least partially by the housing of the torque converter. The housing of the torque converter separates the first pressure space directly from the second pressure space.

The disclosure is concerned with control system and control method, for a vehicle including a driving power source, drive wheels, a first clutch, and a second clutch. An electronic control unit, which is included in the control system, places the first clutch in a half-engaged state with a predetermined clutch torque capacity, when the vehicle is started, performs start control in a first mode using the second clutch, by gradually increasing a clutch torque capacity of the second clutch from a released state, and switches the start control from the first mode using the second clutch to a second mode using the first clutch, when the increased clutch torque capacity of the second clutch reaches the clutch torque capacity of the first clutch.

A four-wheel drive vehicle comprises: main drive wheels and sub-drive wheels; a first input rotating member; a first output rotating member; a second input rotating member; a second output rotating member; a first dog clutch; a second dog clutch; a synchromesh mechanism. In the case of canceling a disconnect state in which the power transmitting member interrupts power transmission from the drive power source and the sub-drive wheels, the control device controls an engagement torque of the coupling to a preset first torque and operates the synchromesh mechanism to engage the first dog clutch when it is determined that the rotation speeds are synchronized between the second input rotating member and the second output rotating member, and controls the engagement torque of the coupling to a second torque smaller than the first torque to engage the second dog clutch when it is determined that the first dog clutch is engaged.

A four-wheel drive vehicle comprises: main drive wheels and sub-drive wheels; a first input rotating member; a first output rotating member; a second input rotating member; a second output rotating member; a first dog clutch; a second dog clutch; a synchromesh mechanism. In the case of canceling a disconnect state in which the power transmitting member interrupts power transmission from the drive power source and the sub-drive wheels, the control device controls an engagement torque of the coupling to a preset first torque and operates the synchromesh mechanism to engage the first dog clutch when it is determined that the rotation speeds are synchronized between the second input rotating member and the second output rotating member, and controls the engagement torque of the coupling to a second torque smaller than the first torque to engage the second dog clutch when it is determined that the first dog clutch is engaged.

A combination starter-generator device for a work vehicle includes an electric machine and a bi-directional gear set. The gear set is configured to receive rotational input from the electric machine and from the engine and to couple the electric machine and the engine in a first power flow direction and a second power flow direction. In the first power flow direction the gear set effects a first gear ratio, and in the second power flow direction the gear set effects a second gear ratio. In the first power flow direction, the gear set receives input power from the electric machine in a first clock direction and outputs power to the engine in a second clock direction opposite the first clock direction. In the second power flow direction, input power from the engine is in the second clock direction and output power to the electric machine is in the second clock direction.

A clutch system for coupling a drive shaft of a motor vehicle engine to a transmission input shaft of a motor vehicle transmission is disclosed. The clutch system includes a friction clutch for transmitting a torque between a torque-introducing element and a torque-discharging element. It also includes a ramp system for an axial displacement of a pressure plate of the friction clutch, wherein the ramp system has an input ramp and an output ramp, which can be turned in relation to the input ramp to change an axial extent of the ramp system. A pilot clutch, which acts on the ramp system, is provided for actuating the friction clutch based on a differential speed between the torque-introducing element and the torque-discharging element. An electromagnet for a magnetic actuation of the pilot clutch is further provided, wherein the ramp system is arranged radially within the friction clutch and/or the pilot clutch.

A clutch system for coupling a drive shaft of a motor vehicle engine to a transmission input shaft of a motor vehicle transmission is disclosed. The clutch system includes a friction clutch for transmitting a torque between a torque-introducing element and a torque-discharging element. It also includes a ramp system for an axial displacement of a pressure plate of the friction clutch, wherein the ramp system has an input ramp and an output ramp, which can be turned in relation to the input ramp to change an axial extent of the ramp system. A pilot clutch, which acts on the ramp system, is provided for actuating the friction clutch based on a differential speed between the torque-introducing element and the torque-discharging element. An electromagnet for a magnetic actuation of the pilot clutch is further provided, wherein the ramp system is arranged radially within the friction clutch and/or the pilot clutch.

An electric machine includes a stator assembly, a rotor positioned within the stator assembly, and a rotor carrier coupled to the rotor. The rotor carrier includes a hub portion, a first cylindrical portion coupled to the hub portion and defining a first diameter that is less than an inner diameter of the rotor, and a second cylindrical portion extending from the first cylindrical portion and defining a second diameter that is greater than the inner diameter of the rotor. A first clutch is positioned within the rotor carrier and engages an inner surface of the first cylindrical portion of the rotor carrier. A second clutch is positioned within the rotor carrier and engages an inner surface of the second cylindrical portion of the rotor carrier.

An electric machine includes a stator assembly, a rotor positioned within the stator assembly, and a rotor carrier coupled to the rotor. The rotor carrier includes a hub portion, a first cylindrical portion coupled to the hub portion and defining a first diameter that is less than an inner diameter of the rotor, and a second cylindrical portion extending from the first cylindrical portion and defining a second diameter that is greater than the inner diameter of the rotor. A first clutch is positioned within the rotor carrier and engages an inner surface of the first cylindrical portion of the rotor carrier. A second clutch is positioned within the rotor carrier and engages an inner surface of the second cylindrical portion of the rotor carrier.

A clutch arrangement for a drive train of a motor vehicle having a hybrid drive includes a first clutch, a second clutch, a central bearing, and a clutch actuator. The first clutch has a first clutch first rotating part and a plurality of connecting segments. The connecting segments are connected to one another for conjoint rotation in a coupled position of the first clutch. The second clutch has a second clutch first rotating part with a shaft region. The second clutch first rotating part is connected for conjoint rotation with the first clutch first rotating part. The central bearing is arranged on the shaft region. The clutch actuator is arranged to interact with the first clutch. The connecting segments are arranged radially to the outside of the clutch actuator. The clutch actuator is arranged radially to the outside of the central bearing. The first clutch, the clutch actuator and the central bearing are arranged at least partially overlapping one another in an axial direction.