A method is proposed to complete a power-on upshift while a vehicle encounters wheel slip conditions such as driving in loose sand. The wheels slip conditions may be detected based on a maximum rate of change of an output shaft exceeding a threshold. In response to the wheel slip conditions, one or more shift parameters may be adjusted to bias the shift toward a tie-up and decrease the chance of a flare. These modified shift parameters may include an increased stroke pressure, a delayed off-going clutch release timing, and an increased ratio change capacity.

A control device for a continuously variable transmission includes a belt type continuously variable transmission and a controller. The controller is configured to calculate an actual gear shift ratio based on rotation speed sensor values from a primary rotation speed sensor and a secondary rotation speed sensor, and to perform gear shift ratio control using feedback control to converge the actual gear shift ratio to a target gear shift ratio. The controller is further configured to stop calculation of the actual gear shift ratio when one of the rotation speed sensor values is less than a first threshold value determined based on a lower limit value of sensor detection accuracy, and stop calculation of the actual gear shift ratio even when one of the rotation speed sensor values is the first threshold value or greater, when a deceleration level of the drive wheel is a prescribed deceleration level or greater.

A control method of a continuously variable transmission includes supplying oil pressure to a line-pressure oil passage and a secondary pulley oil chamber by a source pressure oil pump, controlling a flow of oil into and from a primary pulley oil chamber by an electric oil pump arranged in an oil passage between the primary pulley oil chamber and the secondary pulley oil chamber, and limiting a discharge flowrate of the electric oil pump to an amount smaller than a discharge flowrate of the source pressure oil pump.

A control method of a continuously variable transmission includes supplying oil pressure to a line-pressure oil passage and a secondary pulley oil chamber by a source pressure oil pump, controlling a flow of oil into and from a primary pulley oil chamber by an electric oil pump arranged in an oil passage between the primary pulley oil chamber and the secondary pulley oil chamber, and limiting a discharge flowrate of the electric oil pump to an amount smaller than a discharge flowrate of the source pressure oil pump.

A column-mounted shifter for a transmission includes a housing adapted to mount on a steering column and a shaft supported for rotation within the housing. A lever is operably coupled to the shaft and extends radially therefrom. The lever is pivotal between a series of positions corresponding to a series of modes of the transmission. Rotation of the lever causes rotation of the shaft within the housing. A sensor is configured to sense rotation of the shaft and output a signal indicative of the position of the lever. An actuator arrangement is connectable with the shaft and is configured to rotate the lever from one of the positions to another of the positions.

A back-up control unit of a back-up power source device executes: a battery failure determination process of determining whether or not a battery failure has been detected by a failure detecting unit; when it is determined that battery failure has been detected in the battery failure determination process, a switching instruction determination process for determining, on the basis of an instruction signal from a monitor circuit, whether or not an instruction to switch to a P range has been made by a user; and when it is determined that a switching instruction has been made in the switching instruction determination process, a shifting instruction process for starting power supply from a back-up power source to a shift control unit and instructing the shift control unit to shift to the P range.

Provided is a loading work vehicle capable of improving work efficiency even when working on a slippery road surface. An HST-traveling-drive wheel loader 1 comprises a step-on amount detection sensor 610, a discharge pressure detection sensor 75, a mode switch device 60, and a controller 5. The controller 5 is configured to: determine whether a limit mode is selected by the mode switch device 60; specify an operation state of the wheel loader 1 when determining that the limit mode is selected; limit maximum traction force to a first set value which is set based on a static friction coefficient ? and vehicle weight when specifying that a bucket 23 is pushed into a natural ground 100; and increase the maximum traction force from the first set value when specifying that excavation of the natural ground 100 is started.

An agricultural vehicle includes a driveline, an interface, and a control system. The driveline includes an engine, a transmission, and a power take off (PTO). The interface is configured to removably couple an implement with the agricultural vehicle. The implement configured to perform an agricultural function. The control system includes processing circuitry configured to obtain an indication of a type of the implement that is removably coupled with the agricultural vehicle. The processing circuitry is also configured to determine a profile for at least the transmission based on the type of the implement that is removably coupled with the agricultural vehicle. The profile defines an operating parameter for at least the transmission such that the transmission operates in a specific manner for the type of the implement. The processing circuitry is also configured to operate at least the transmission according to the operating parameter of the profile.

An agricultural vehicle includes a driveline, an interface, and a control system. The driveline includes an engine, a transmission, and a power take off (PTO). The interface is configured to removably couple an implement with the agricultural vehicle. The implement configured to perform an agricultural function. The control system includes processing circuitry configured to obtain an indication of a type of the implement that is removably coupled with the agricultural vehicle. The processing circuitry is also configured to determine a profile for at least the transmission based on the type of the implement that is removably coupled with the agricultural vehicle. The profile defines an operating parameter for at least the transmission such that the transmission operates in a specific manner for the type of the implement. The processing circuitry is also configured to operate at least the transmission according to the operating parameter of the profile.

A hydraulic pressure control method for a vehicle transmission includes accumulating factors representing vehicle usage, accumulating factors representing driver's driving tendency, calculating a first line pressure compensation value according to the usage depending on the accumulated values of the factors representing the vehicle usage, calculating a second line pressure compensation value according to the driver's driving tendency depending on the accumulated values of the factors representing the driver's driving tendency, determining a final line pressure by adding the first and second line pressure compensation values according to the usage and the driver's driving tendency to a basic line pressure, and operating a transmission hydraulic system according to the final line pressure.