A method for rocking a vehicle free. The vehicle comprises a drive aggregate (2), a transmission (4), shifting elements (10), and a starting element (5). The rocking free process is carried out as a function of actuation of an accelerator pedal (11) by the driver or a torque delivered by the drive aggregate (2) as a function of the actuation of the accelerator pedal. The shifting element (10) is controlled such that reduced actuation of the accelerator pedal or reduced torque delivered by the drive aggregate (2), reduces a control pressure of the shifting element (10) of the transmission (4) down to a filling pressure or a pressure that corresponds to the filling pressure, and increased actuation of the accelerator pedal or increased torque delivered by the drive aggregate (2), increases the control pressure of the shifting element (10) and the shifting element is operated in a slipping mode.

A method for rocking a vehicle free. The vehicle comprises a drive aggregate (2), a transmission (4), shifting elements (10), and a starting element (5). The rocking free process is carried out as a function of actuation of an accelerator pedal (11) by the driver or a torque delivered by the drive aggregate (2) as a function of the actuation of the accelerator pedal. The shifting element (10) is controlled such that reduced actuation of the accelerator pedal or reduced torque delivered by the drive aggregate (2), reduces a control pressure of the shifting element (10) of the transmission (4) down to a filling pressure or a pressure that corresponds to the filling pressure, and increased actuation of the accelerator pedal or increased torque delivered by the drive aggregate (2), increases the control pressure of the shifting element (10) and the shifting element is operated in a slipping mode.

A transmission system for a work vehicle includes a transmission. The transmission includes one or more input shafts, one or more output shafts, and shafts disposed in-between. The transmission includes gear sets disposed on the shafts, wherein the gear sets include intermediate gear sets. The transmission includes clutches disposed along the shafts, wherein each of the clutches is configured to selectively couple a respective gear set of the gear sets corresponding to a respective power flow path of the transmission. The transmission also includes a forward coupler and a reverse coupler each disposed on one of the shafts. The transmission system also includes a controller configured to receive a signal indicative of a shuttle shift, and in response to receiving the signal, instruct the clutches to stop rotation of the intermediate gear sets and subsequently shuttle shift between forward and reverse directions.

A motor vehicle control system that includes a first user-operable transmission selector for selecting a transmission operating mode and a user-operable gear selector, such as paddle input controls. The gear selector is operable in a first functional mode to select between a plurality of forward direction gear ratios. The gear selector is also operable in a second functional mode to select between a forward direction and reverse direction. This allows a user to use the gear selector to control travel in forward and reverse directions.

Techniques for controlling an automatic transmission of a vehicle include receiving a set of operating parameters each relating to a rock cycling maneuver of the vehicle, the rock cycling maneuver comprising a plurality of consecutive garage shifts of the transmission, determining whether the set of operating parameters satisfy a set of entry or exit criteria to/from a rock cycling mode of the transmission and enter/exit the rock cycling mode based on the determination, while not in the rock cycling mode, controlling the transmission based on a first set of calibrations for the transmission, the first set of calibrations being optimized for normal garage shifts of the transmission, and while in the rock cycling mode, controlling the transmission based on a different second set of calibrations for the transmission, the second set of calibrations being optimized for the rock cycling maneuver.

A transmission system for a work vehicle includes a transmission. The transmission includes one or more input shafts, one or more output shafts, and shafts disposed in-between. The transmission includes gear sets disposed on the shafts, wherein the gear sets include intermediate gear sets. The transmission includes clutches disposed along the shafts, wherein each of the clutches is configured to selectively couple a respective gear set of the gear sets corresponding to a respective power flow path of the transmission. The transmission also includes a forward coupler and a reverse coupler each disposed on one of the shafts. The transmission system also includes a controller configured to receive a signal indicative of a shuttle shift, and in response to receiving the signal, instruct the clutches to stop rotation of the intermediate gear sets and subsequently shuttle shift between forward and reverse directions.

Embodiments of the present invention provide a vehicle speed control system operable to cause a vehicle to operate in accordance with a target speed value, the system being operable automatically to perform a direction change operation wherein the system causes a transmission of the vehicle to adopt a configuration corresponding to travel in an opposite direction to the instant configuration when the vehicle speed does not exceed a prescribed transmission direction change speed.

Some embodiments of the present invention provide a control system for a motor vehicle having a first user-operable transmission selector means for selecting a forward operating mode of a transmission corresponding to travel in a forward direction and a reverse operating mode of a transmission corresponding to travel in a reverse direction opposite the forward direction, the control system comprising: a user-operable gear selector configured in a first functional mode to, upon receipt of a user input, select between a plurality of forward direction gear ratios, and wherein the user-operable gear selector is re-configured in a second functional mode to, upon receipt of a user input, select between the forward operating mode and the reverse operating mode.

Provided is a method for controlling a dual clutch transmission of a vehicle with a first clutch associated with a first set of gears and a second clutch associated with a second set of gears. The method includes the steps of a) engaging the first clutch to transmit the torque through one of the associated first set of gears, while the second clutch is not engaged, and b) thereafter engaging, before the first clutch is fully closed, the second clutch at least partially and releasing the first clutch assembly until the first clutch is completely disengaged.

A method of operating a dual-clutch transmission of a vehicle having partial transmissions with respective transmission input shafts. Two friction clutches can couple a corresponding input shaft of the partial transmissions to a drive shaft. Both partial transmissions drive a common output shaft. In a process for starting the motor vehicle, a gear in each of the two partial transmissions is engaged and, if the starting speed of the vehicle in a primary direction is lower than a limit value, the gears in the two partial transmissions are kept engaged. If, however, the starting speed is higher than the limit value, the gear for the travel in an opposite direction in the partial transmission, not involved in the starting process, is disengaged and a follow-up gear, for the gear in the partial transmission involved in the starting process, is engaged.