An operating method for an industrial truck. The industrial truck includes a hydraulic pump which provides a hydraulic output, an output setpoint value generator which controls the hydraulic output to influence a traveling speed, two drive wheels which respectively comprise a hydraulic drive unit driven via the hydraulic pump, and a hydraulic device. The hydraulic device is switchable between a first switching state, where the hydraulic drive units are supplied with hydraulic outputs which are different, and a second switching state, where the hydraulic drive units are supplied with hydraulic outputs that have a particular ratio with respect to each other. The operating method includes detecting at least one operating parameter of the output setpoint value generator, comparing the at least one operating parameter with a predefined threshold value, and moving the hydraulic device from the first switching state to the second switching state based on the comparison.

A hydraulic transaxle of the present invention includes an axle, a hydraulic static transmission (HST), a center case that has pair of oil passages for circulating the hydraulic oil between the hydraulic pump and the hydraulic motor, and a gear mechanism that transmits an output of the HST to the axle. A case supports the axle and accommodates the HST while also forming an oil reservoir. A hydraulic motor of the HST includes a motor shaft, a cylinder block with a plurality of cylinders fixed to the motor shaft, a plurality of pistons inserted into the cylinders, a fixed swash plate abutted by the plurality of pistons, and a fixed swash plate holder that supports the fixed swash plate with respect to the case. The motor shaft of the hydraulic motor is supported by the center case and the fixed swash plate holder.

In an anti-reverse valve, a first communication passage that allows the first supply and discharge passage to communicate with the first pressure chamber and a second communication passage that allows the second supply and discharge passage to communicate with the second pressure chamber are provided inside the spool, a first restrictor is provided in the first communication passage, a second restrictor is provided in the second communication passage, and a first annular groove that allows the first supply and discharge passage to communicate with the drain passage when the spool is placed at the first communication position and a second annular groove that allows the second supply and discharge passage to communicate with the drain passage when the spool is placed at the second communication position are provided in an outer periphery of the spool.

An example includes a hydraulically controllable coupling to couple a rotating input and to an output to rotate, or to decouple the input and the output, with coupling and decoupling modes selected by switching a hydraulic device such as a vane pump between a pumping mode and a mode in which it does not pump. In an example, the system cooperates with a transmission to increase the number of possible gear ratios in some examples.

An example includes a hydraulically controllable coupling to couple a rotating input and to an output to rotate, or to decouple the input and the output, with coupling and decoupling modes selected by switching a hydraulic device such as a vane pump between a pumping mode and a mode in which it does not pump. In an example, the system cooperates with a transmission to increase the number of possible gear ratios in some examples.

A vehicle includes: a power source; a first drive device configured to be driven by an output of the power source; a second drive device configured to be driven by the output of the power source; a non-stage transmission device capable of continuously changing a rotation speed which is transmitted to an input shaft of the second drive device; a power distribution device coupled to an output shaft of the power source, coupled to an input shaft of the first drive device and an input shaft of the non-stage transmission device, and configured to be capable of distributing the output of the power source to the first drive device and the second drive device in a state where the output shaft of the power source is coupled to the input shaft of the first drive device and the input shaft of the non-stage transmission device at respective predetermined fixed reduction ratios; a first instruction device configured to output a first instruction value related to a rotation speed of the input shaft of the first drive device; a second instruction device configured to output a second instruction value related to a torque of the input shaft of the second drive device; and a control device configured to be capable of controlling the output of the power source and a transmission ratio of the non-stage transmission device. The control device includes: an output control part configured to control an output of the power source in accordance with the first instruction value outputted from the first instruction device; and a transmission control part configured to control the transmission ratio of the non-stage transmission device in accordance with the second instruction value outputted from the second instruction device.

A hydraulic apparatus configured to supply track-setting devices for producing a cross-country skiing trail; the apparatus comprising: a first inlet configured to receive a fluid; a first outlet and a second outlet configured to release two flows of fluid; a first hydraulic coupling motor having a second inlet, a third outlet and a first shaft; and a second hydraulic coupling motor having a third inlet, a fourth outlet and a second shaft; wherein the second inlet and the third inlet are connected to the first inlet, and the first shaft and the second shaft are integrally connected to each other, the third outlet being connected to the first outlet, and the fourth outlet being connected to the second outlet.

A hydraulic apparatus configured to supply track-setting devices for producing a cross-country skiing trail; the apparatus comprising: a first inlet configured to receive a fluid; a first outlet and a second outlet configured to release two flows of fluid; a first hydraulic coupling motor having a second inlet, a third outlet and a first shaft; and a second hydraulic coupling motor having a third inlet, a fourth outlet and a second shaft; wherein the second inlet and the third inlet are connected to the first inlet, and the first shaft and the second shaft are integrally connected to each other, the third outlet being connected to the first outlet, and the fourth outlet being connected to the second outlet.

A hydraulic system for a work machine includes a travel hydraulic device which changes a travel speed in accordance with switching positions of a hydraulic switch valve. A controller controls a proportional valve so as to change a pressure of an operation fluid at an increasing rate over a time while the hydraulic switch valve is switched from a first switching position to a second switching position to increase the travel speed from a first speed to a second speed, and at a decreasing rate over the time while the hydraulic switch valve is switched from the second switching position to the first switching position to decrease the travel speed from the second speed to the first speed. A magnitude of the increasing rate is different from one of the decreasing rate to output an operation fluid.

A control apparatus for a linear solenoid valve configured to regulate a hydraulic pressure in a vehicle transmission. The control apparatus includes a hydraulic control portion configured to output a control command signal that is applied to a solenoid of the linear solenoid valve. The hydraulic control portion outputs, as the control command signal, a regulating control command signal by which the hydraulic pressure is to be regulated to a regulated pressure value that is dependent on a vehicle driving state. When the regulated pressure value is in a certain pressure range in which vibration-based noise is likely to be generated by vibration of the linear solenoid valve that is operated with the regulating control command signal being applied to the solenoid, the hydraulic control portion outputs, as the control command signal, a noise-restraining command signal by which generation of the vibration-based noise is restrained.