A drive device for a PTO shaft includes a parking switch to detect a parking state of a vehicle body, a permission switch constituted of a self-returning switch and connected to the parking switch, the permission switch being configured to be switched to permit driving a PTO shaft, the PTO shaft being configured to be driven by a power of a prime mover disposed on the vehicle body, and a first switch device to be switched to enable the PTO shaft to be driven when the permission switch is switched to permit driving the PTO shaft under a state where the parking switch detects the parking state of the vehicle body.

Provided is an automatic transmission capable of smoothly switching a switching mechanism. A control part ECU of a transmission recognizes an input torque and a friction torque when an instruction to switch a two-way clutch from a fixed state to a reverse rotation prevention state is received while a first clutch, a second clutch and a third clutch are in an open state, and switches the two-way clutch from the fixed state to the reverse rotation prevention state when the input torque is equal to or greater than the friction torque.

A control valve includes a housing, a valve body arranged in a valve chamber of the housing, and a support portion slidably supporting an outer surface of the valve body in the valve chamber. The valve body is slidable on the support portion between an open position at which an outlet port is open and a closed position at which a seat surface of the valve body closes the outlet port. The valve body includes a skin layer forming the outer surface of the valve body, and a core layer under the skin layer. The outer surface of the valve body, other than the seat surface and a slidable area, includes a core exposed portion where the core layer is exposed without being covered with the skin layer.

A hydraulic arrangement for an electrically operable, multigear axle drive train of a motor vehicle comprising a hydraulic circuit in which a hydraulic fluid is guided, a hydraulic pump arranged to apply pressure to the hydraulic fluid within the hydraulic circuit, a first hydraulic path arranged to connect a first clutch device to the hydraulic circuit, and a second hydraulic path arranged to connect a second clutch device to the hydraulic circuit. The first and second clutch devices are each arranged to actuate a gear selection device of the electrically operable axle drive train.

A method for controlling a vehicle transmission includes electrically connecting a Transmission or Powertrain Control Unit (TCU or PCU) to the vehicle transmission, the TCU or PCU controlling operation of the transmission and having switchable power on a high side, and switchable ground on a low side of a plurality of solenoids in a shared functional grouping configuration, proportionally controlling an amount of current through a load such as a solenoid via controlling an amount of time current is being sunk through the solenoid to ground and controlling an amount of time current is provided via an adaptable recirculation path in the TCU or PCU, the recirculation path minimizing current decay when the solenoid is driven in an OFF state. The TCU or PCU having a single hardware layout, but being electronically adaptable to control a plurality of transmission types and solenoid architectures based on any desired functional solenoid grouping.

A method for controlling a vehicle transmission includes electrically connecting a Transmission or Powertrain Control Unit (TCU or PCU) to the vehicle transmission, the TCU or PCU controlling operation of the transmission and having switchable power on a high side, and switchable ground on a low side of a plurality of solenoids in a shared functional grouping configuration, proportionally controlling an amount of current through a load such as a solenoid via controlling an amount of time current is being sunk through the solenoid to ground and controlling an amount of time current is provided via an adaptable recirculation path in the TCU or PCU, the recirculation path minimizing current decay when the solenoid is driven in an OFF state. The TCU or PCU having a single hardware layout, but being electronically adaptable to control a plurality of transmission types and solenoid architectures based on any desired functional solenoid grouping.

A hydraulic arrangement for an electrically operable, multigear axle drive train of a motor vehicle comprises a hydraulic circuit in which a hydraulic fluid is guided, a hydraulic pump arranged to apply pressure to the hydraulic fluid within the hydraulic circuit, a first hydraulic path arranged to connect a first clutch device to the hydraulic circuit, and a second hydraulic path arranged to connect a second clutch device to the hydraulic circuit. The first and second clutch devices are each arranged to actuate a gear selection device of the electrically operable axle drive train.

An electromagnetic valve includes a valve compartment inside an end tubular portion of a housing, a valve element provided in the valve compartment and movable to open or close a valve port, a guide member slidably supporting the valve element, a shaft contacting an end of the valve element to move the valve element, and a pressure release passage through which an inner compartment of the valve element communicates with the valve port in a closed state of the valve element.

An electro-hydraulic control system for a multispeed transmission having a plurality of torque-transmitting mechanisms includes a controller for operably controlling the transmission, a fluid source for supplying hydraulic fluid, and a plurality of torque-transmitting mechanisms being operably selected between an applied and an unapplied state to achieve a plurality of ranges including at least one reverse, a neutral, and a plurality of forward ranges. The system includes a plurality of trim systems having pressure control solenoids and trim valves. The system may also include one or more shift valves disposed in fluid communication with the fluid source and being capable of moving between stroked and de-stroked positions. In any given range, only two of the plurality of torque-transmitting mechanisms may be applied. Moreover, three of the plurality of pressure control solenoids are normally high solenoids, and the remaining solenoids are normally low solenoids.

An electro-hydraulic control system for a multispeed transmission having a plurality of torque-transmitting mechanisms includes a controller for operably controlling the transmission, a fluid source for supplying hydraulic fluid, and a plurality of torque-transmitting mechanisms being operably selected between an applied and an unapplied state to achieve a plurality of ranges including at least one reverse, a neutral, and a plurality of forward ranges. The system includes a plurality of trim systems having pressure control solenoids and trim valves. The system may also include one or more shift valves disposed in fluid communication with the fluid source and being capable of moving between stroked and de-stroked positions. In any given range, only two of the plurality of torque-transmitting mechanisms may be applied. Moreover, three of the plurality of pressure control solenoids are normally high solenoids, and the remaining solenoids are normally low solenoids.