An automatic transmission that includes a speed change mechanism including a gear mechanism that can attain a plurality of shift speeds, and a plurality of friction engagement elements that are selectively engaged to attain each shift speed in the gear mechanism; a hydraulic control device that can regulate engagement pressures to be supplied to hydraulic servos of the plurality of friction engagement elements and that can supply lubricating oil that lubricates the speed change mechanism; and a control unit that sends a command about the engagement pressures to the hydraulic control device to control engagement states of the plurality of friction engagement elements.

A method of operating an agricultural vehicle including a range gearbox, an independent PTO system driven from an auxiliary drive shaft and a ground speed PTO system driven from an output shaft of the range gearbox. The method includes transferring torque from the auxiliary drive shaft to the output shaft of the range gear box via the independent PTO system and the ground speed PTO system while drive to the range gearbox is interrupted during a change in the range gear.

A method of estimating an operating parameter of industrial mechanical power transmission equipment is provided. The method includes acquiring data of a first parameter of the gearbox using a sensor, inferring a second parameter of a gearbox based on the acquired data of the first parameter by using a machine learning model, wherein the second parameter is of a different type from the first parameter and includes at least one of a torque of the gearbox, a rotational speed of the gearbox, or an overhung shaft force of the gearbox, and outputting the estimated second parameter.

A method of operating a machine with at least one hydraulically actuated friction clutch. The method includes selecting, via a mode selector, a starting point defining an initial setting. An endpoint defining a peak setting is selected via the mode selector. A control curve is employed based on at least the selecting of the starting point and the selecting of the endpoint. An inching pedal of the machine is positioned to between 0 percent depressed and 100 percent depressed. At least one control command is generated as a function of the employing of the control curve and the positioning of the inching pedal. At least one control valve of at least one hydraulically actuated friction clutch is operated according to the at least one control command.

A method of operating an agricultural vehicle including a range gearbox, an independent PTO system driven from an auxiliary drive shaft and a ground speed PTO system driven from an output shaft of the range gearbox. The method includes transferring torque from the auxiliary drive shaft to the output shaft of the range gear box via the independent PTO system and the ground speed PTO system while drive to the range gearbox is interrupted during a change in the range gear.

A gearbox control module for a gearbox comprises an electronic component with an electronic circuit configured to control the gearbox, electrical connections and a module carrier. The electronics component and the electrical connections are mounted on the module carrier, and the module carrier is a cover configured to sealingly close off an interior of the gearbox.

A method for the safe operation of a drive of a motor vehicle, the drive being controlled by at least one control unit, including acceleration monitoring in which the allowability of an operating state of the drive results as a function of a comparison of an ascertained actual acceleration with an allowable acceleration, a fault response being initiated as a function of whether a braking request is present, if the comparison shows that an inadvertent acceleration is present.

A transmission includes a first hydraulic clutch, a second hydraulic clutch, a third hydraulic clutch, a pump and a controller. The first, second, and third hydraulic clutches are configured to established a parked-ready condition upon engagement of all three clutches. The pump is configured to generate hydraulic fluid pressure. The controller is programmed to, in response to a command to start an engine that powers the pump, engage the first and second clutches. The controller is further programmed to, in response to engagement of the first and second clutches and obtaining operating hydraulic fluid pressure, engage the third clutch.

A continuously variable transmission (100), wherein pressure equalization control is performed to make line pressure (PL) equal to secondary pressure (Psec) when prescribed start conditions are satisfied. During pressure equalization control, a secondary pressure indicated value (Psec_co) is raised by a prescribed amount (S10), then a line pressure indicated value (PL_co) is gradually decreased (S30). If determination is made that line pressure is the same as the secondary pressure after secondary actual pressure (Psec) is lowered (S40), then the line pressure is controlled so that the secondary actual pressure (Psec) becomes the secondary pressure indicated value (Psec_co) (S50). At the start of pressure equalization control, if the difference (ΔPsec) found by subtracting the secondary pressure indicated value from the secondary actual value is negative (S120), then a primary pressure indicated value is corrected on the basis of the difference (S130).

An apparatus for controlling an electric oil pump (EOP) includes a controller calculating first revolutions per minute (RPM), second RPM and third RPM, the first RPM being EOP RPM required for control of a brake in a transmission, the second RPM being EOP RPM required for cooling of a plurality of motors, and the third RPM being EOP RPM required for lubrication of the plurality of motors, the controller comparing the second RPM with the third RPM and driving the EOP at an RPM obtained by adding the first RPM to the greater of the second RPM and the third RPM.