A method for operating a drive-train of a motor vehicle. The drive-train having a transmission connected between a drive aggregate and a drive output. A hydrodynamic starting element is connected between the drive aggregate and transmission. The starting element includes a converter and converter lock-up clutch. A Power Take-Off (PTO) can be coupled to the drive aggregate on the drive aggregate side to take up drive torque delivered by the drive aggregate. In order to determine the torque taken up by the PTO, the lock-up clutch is operated in a rotational-speed-regulated manner at least when the PTO is coupled to the drive aggregate in order to set a defined target slip at the lock-up clutch. As a function of the actuation pressure of the lock-up clutch required for setting the target slip when the PTO is coupled, the torque taken up by the PTO is determined.

A vehicle control device applicable to a vehicle including an engine includes an electric motor coupled to the engine, a hydraulic clutch, a solenoid control valve, a first travel control unit, a second travel control unit, and a fail-safe control unit. The hydraulic clutch is engaged when hydraulic oil is supplied and disengaged when the hydraulic oil is discharged. The solenoid control valve includes a solenoid. The solenoid control valve supplies the hydraulic oil to the hydraulic clutch when the solenoid is in a non-energized state, and discharges the hydraulic oil when the solenoid is in the energized state. The first travel control unit executes an engine traveling mode, and the second travel control unit executes an inertial traveling mode. The fail-safe control unit drives the electric motor when the solenoid is switched from the energized state to the non-energized state while the inertial traveling mode is executed.

An auxiliary power take-off assembly in an automatic transmission of a motor vehicle provided with a torque converter, having a transmission input and transmission output having a drive shaft at the transmission input that is permanently connected to a drive motor of the motor vehicle via a pump shaft of the torque converter. A transmission output shaft at the transmission output, and a transmission chain includes at least one drive element and one output element. The output element can be connected to an additional unit to be driven. A switch element, which is arranged so as to act between the drive shaft and the drive element of the transmission chain for optionally connecting the drive shaft to the drive element. The drive element and the output element are designed as gearwheels which are engaged with one another without an intermediate wheel.

In an aspect, an isolation device is provided for a belt and a component shaft in an engine. The device includes a hub, a pulley, an isolation spring and a damping member that is fixed rotationally relative to the hub and is engageable frictionally with the pulley. Torque transmission through the spring below a selected non-zero torque, irrespective of hub load on the pulley, drives a change in radius of the helical coils of the spring that is sufficiently small that the spring avoids pressing the damping member against the pulley. Torque transmission through the spring above the selected non-zero torque, irrespective of hub load on the pulley, drives a change in radius of the helical coils that is sufficiently large that the isolation spring applies a radial force to press the damping member against the pulley so as to generate frictional damping.

Methods and systems relating to an internal combustion engine support bracket are disclosed. The engine bracket includes a housing defining a fluid passage configured to be in fluid receiving communication with an upstream aperture of the housing and in fluid providing communication with a downstream aperture of the housing. The engine bracket also includes at least one mounting platform with fasteners configured to removably engage an accessory device of an internal combustion engine.

A vehicle includes a chassis, a cab coupled to the chassis, an engine coupled to the chassis and positioned at least one of beneath or behind the cab, a cooling system coupled to the chassis, and a connecting shaft. The cooling system includes a fan positioned forward of a front of the cab such that the fan is spaced from the engine. The connecting shaft extends from the engine, past the front of the cab, and to the fan. The connecting shaft is positioned to facilitate driving the fan with the engine.

Methods and systems are provided for a vehicle adapted to be operated based on fuel combustion or electric power. In one example, an accessory train of the vehicle, including an air conditioning pump and a power steering pump, may be operated according to a first mode or according to a second mode based on a power system of the vehicle. When in the second mode, the vehicle may be instructed to coordinate operation of the air conditioning pump and the power steering pump.

A front end accessory drive system is disclosed. The system includes a hub configured to drivingly engage with a crankshaft and a gear transmission system. A one-way clutch includes a first bearing ring connected to an end of a plurality of planet pins of the gear transmission system, and a second bearing ring connected to a sun gear of the gear transmission system. A pump configured to direct hydraulic fluid through a hydraulic fluid circuit. A clutch pack is in fluid connection with the hydraulic fluid circuit. The clutch pack includes at least one clutch plate supported by the gear transmission system, such that a portion of the gear transmission system is grounded via frictional engagement of the at least one clutch plate in an actuated state of the clutch pack.

An accessory drive pulley assembly is configured to transfer rotational power from an engine crankshaft to one or more vehicle accessories. The accessory drive pulley has an inner race rotatable about an axis and having an outer surface. An outer race is located radially outward from the inner race and has an inner surface facing the inner race. A wedge plate is located radially between the outer surface and the inner surface. The wedge plate is configured to expand and contract radially to selectively lock and unlock the inner race with the outer race. When locked, an associated pulley can rotate at a different speed than when unlocked.

An accessory drive, including a planetary gear set with a plurality of components arranged to be concentrically disposed around a crankshaft of an internal combustion engine. The plurality of components includes: a sun gear; a planet carrier; a ring gear; and a planet gear meshed with the sun gear and the ring gear. A first component of the planetary gear set: is arranged to non-rotatably connect to a rotor of an electric motor/generator; and is arranged to connect to a power transfer component for least one accessory. A second component of the planetary gear set is arranged to non-rotatably connect to the crankshaft. For a starting mode of the accessory drive, the electric motor/generator is arranged to: rotate the first component of the planetary gear set; and rotate the second component of the planetary gear set with respect to the first component of the planetary gear set.