A milling machine includes a rotor drive transmission having a plurality of gears disposed between a prime mover and a cutting rotor. The rotor drive transmission is associated with a rotor transmission hydraulic circuit including a hydraulic gearshift actuator to engage the plurality of gears in one or more gear ratios and a gearshift directional control valve to direct hydraulic fluid to and from the hydraulic gearshift actuator. In occurrence of a fault condition, the rotor transmission hydraulic circuit includes a gearshift trapping valve to maintain hydraulic pressure in the hydraulic gear actuator and the engaged gear ratio of the rotor drive transmission.

The present invention relates to a method for resolving a tooth-on-tooth position of a positive-locking shifting element of an automated manual transmission, in which gear steps of the automated manual transmission are changed by means of a pressure-medium-actuated shift actuator. If, during a change of a gear step of the automated manual transmission, a tooth-on-tooth position occurs at the interlocking shifting element, then the control of the pressure-medium-actuated shift actuator is varied in such manner as to resolve the tooth-on-tooth position. A control unit for carrying out the method is also disclosed.

A stroke sensor includes a cover that covers a slide end on a protrusion side of a shaft in a slide region between the shaft and a housing while allowing a relative movement between the shaft and the housing, wherein a flange surface the extends radially outward from the slide end is provided on the housing, an axial direction seal that is in close contact with the flange surface in the axial line direction is provided on the cover, and a fixation member that presses the axial direction seal to be in contact with the flange surface is further provided.

A shift selector device includes an input member, a position setting mechanism and an activation controller. A selection operation of selecting a shift position is input to the input member. The position setting mechanism defines a movable range of the input member while supporting the input member in a displaceable manner. A plurality of the shift positions and at least one activation position linked to an automated travel system are disposed in the movable range. When the activation position is selected by displacement of the input member, the activation controller outputs an activation instruction for instructing a control function of the automated travel system linked to the activation position to be activated.

A shift device includes: a shift switching member including valley portions corresponding to shift positions; a motor including a rotor and a stator and configured to drive the shift switching member; a first drive system including a first control unit configured to control a voltage for driving the motor; a second drive system provided separately from the first drive system and including a second control unit configured to control a voltage for driving the motor; and a positioning member configured to establish the shift positions in a state in which the positioning member is fitted into any one of the valley portions of the shift switching member. The shift device acquires the shift positions when the motor is driven by the voltage output from one of the first and second drive systems to move the positioning member such that the positioning member continuously passes through the valley portions.

The present disclosure describes a hydraulic control system comprising a first pressure chamber and a second pressure chamber, each pressure chamber configured to receive a hydraulic fluid, a first movable member configured to assume a position depending on a hydraulic pressure of the hydraulic fluid in the first pressure chamber and a second movable member configured to assume a position depending on a hydraulic pressure of the hydraulic fluid in the second pressure chamber, a hydraulic command circuit configured to provide the hydraulic fluid and to control the hydraulic pressure of the hydraulic fluid in the first pressure chamber and/or the second pressure chamber, having a switchable valve in fluid communication with the first pressure chamber, wherein the switchable valve is configured to be pilotable depending on the hydraulic pressure of the hydraulic fluid in the second pressure chamber.

Methods and systems are provided for controlling engine operation in response to a request to shift a transmission gear. In one example, a method may include maintaining operating conditions of an engine and redirecting electric power generated via the engine from a traction motor to a battery in response to a request to shift a transmission while the driveline is operating in a series mode. In this way engine efficiency may be improved and a time frame for shifting a transmission gear may be reduced responsive to a gear shift request while the powertrain is operating in series mode.

A gear shifting apparatus in a new energy vehicle includes a primary power transmission unit, a secondary power transmission unit, an intermediate shaft, an intermediate shaft gear, a first clutch unit, a second clutch unit, and a third clutch unit. The intermediate shaft gear is fixedly sleeved on the intermediate shaft, and the first clutch unit is disposed between the intermediate shaft and the primary power transmission unit. The second clutch unit is disposed between the intermediate shaft and the secondary power transmission unit. The third clutch unit is disposed between the primary power transmission unit and the intermediate shaft gear.

A system and method for operating the same includes a drive sprocket assembly, a clutch lever, a user interface generating a reverse signal at a user interface, a wheel speed sensor generating a wheel speed signal, a transmission position sensor generating a transmission position signal and a vehicle control module receiving the reverse signal, the wheel speed signal and the transmission position signal. The vehicle control module engages a reverse gear at a drive sprocket in response to the reverse signal, the wheel speed and transmission gear position and controls the drive sprocket assembly in response to the clutch lever.

An actuating mechanism includes a gear shifting motor, a first transmission gear, second transmission gears, gear shifting screws, a push block, a shift fork, a shift block and a linear driving device. An output shaft of the gear shifting motor is provided thereon with the first transmission gear engaged with the second transmission gears; the second transmissions gears are fixedly connected to the gear shifting screws; the gear shifting screws are in screw thread connection with the push block provided thereon with a through hole; one end of the shift block is connected to the linear driving device, and the other end is aligned with a groove on the shift fork after inserting into the through hole. The linear driving device corresponding to a shift position drives the shift block; the gear shifting motor drives the first transmission gear; and the second transmission gears drive the gear shifting screws.