This device for estimating a degree of fatigue of a motive force transmitting component is a device for estimating the degree of fatigue of a motive force transmitting component in a motive force transmitting system from a motor/generator (drive source) to a driving wheel (wheel), and is provided with an estimation unit which estimates the degree of fatigue of the motive force transmitting component on the basis of the magnitude and direction of torque acting on the motive force transmitting component, and an output unit which outputs a signal indicating that the degree of fatigue has exceeded a threshold if the degree of fatigue exceeds a prescribed threshold that is set in advance.

A hydraulic fracturing system includes an engine, transmission, and hydraulic fracturing pump. A driveshaft is coupled between the transmission and the hydraulic fracturing pump to transfer torque from the engine to the hydraulic fracturing pump. The hydraulic fracturing system also includes an advisory system including a display, a memory storing fuel consumption data and component durability data, and a controller. The controller is programmed to receive pump flow and pressure settings, identify an optimal transmission gear based on the pump flow and pressure settings, the fuel consumption data and the component durability data, and cause the optimal transmission gear to be displayed on the display.

A method is provided for controlling a gear change in the case of a non-synchronized dog-shift transmission having at least one shift fork controllable by way of a selector drum, wherein, by way of a position sensor on the selector drum, the rotational position of the selector drum is sensed and is transmitted to an electronic control unit for controlling a drive motor. By use of the sensed rotational position, the control unit detects whether the/a shift fork is in an intermediate position, in which none of the two possible gears associated with the shift fork is engaged. If the shift fork is in the intermediate position, the rotational speed of the drive motor is controlled to a middle value between the target rotational speeds of the two possible gears if in addition the clutch between the drive motor and the dog-shift transmission is open.

A system, apparatus and method are provided for limiting operating speed at high temperatures of a self-propelled, agricultural product applicator having a hydraulic drive system including a pump supplying pressurized hydraulic fluid to a variable-displacement hydraulic motor operatively connected for propelling the applicator. A temperature sensor detects a temperature of the pressurized hydraulic fluid in the hydraulic system. A propel controller is operatively connected between the temperature sensor and the propulsion motor and configured for limiting displacement of the propulsion motor according to one or more predetermined de-rated conditions resulting in reduced motor speed, in accordance with a predetermined schedule, when predetermined motor de-rating activation temperature limits of the hydraulic fluid are detected by the temperature sensor. The controller is further configured for providing a de-rated condition warning signal prior to limiting displacement of the propulsion motor.

A system, apparatus and method are provided for limiting operating speed at high temperatures of a self-propelled, agricultural product applicator having a hydraulic drive system including a pump supplying pressurized hydraulic fluid to a variable-displacement hydraulic motor operatively connected for propelling the applicator. A temperature sensor detects a temperature of the pressurized hydraulic fluid in the hydraulic system. A propel controller is operatively connected between the temperature sensor and the propulsion motor and configured for limiting displacement of the propulsion motor according to one or more predetermined de-rated conditions resulting in reduced motor speed, in accordance with a predetermined schedule, when predetermined motor de-rating activation temperature limits of the hydraulic fluid are detected by the temperature sensor. The controller is further configured for providing a de-rated condition warning signal prior to limiting displacement of the propulsion motor.

A power train for a hybrid electric vehicle includes only one motor and an engine, and further includes a structure capable of reducing a capacity of the motor. The power train may high-efficiently implement various driving modes such as a high-efficiency EV mode, an engine and motor parallel HEV mode, and an engine connecting mode using only the one motor and engine, in order to achieve a reduced manufacturing cost as compared to a conventional power train in which two motors are used.

A hydraulic fracturing system includes an engine, transmission, and hydraulic fracturing pump. A driveshaft is coupled between the transmission and the hydraulic fracturing pump to transfer torque from the engine to the hydraulic fracturing pump. The hydraulic fracturing system also includes an advisory system including a display, a memory storing fuel consumption data and component durability data, and a controller. The controller is programmed to receive pump flow and pressure settings, identify an optimal transmission gear based on the pump flow and pressure settings, the fuel consumption data and the component durability data, and cause the optimal transmission gear to be displayed on the display.

A control apparatus of an automatic transmission including a plurality of gear mechanisms, frictional elements, an oil pressure supply device which supplies an oil pressure for operating the frictional elements between an engaged state and a disengaged state and an oil pressure controller which controls an oil pressure for operating the plurality of frictional elements. The oil pressure controller determines a heat quantity absorbed by the plurality of frictional elements when the frictional elements are switched between the engaged state and the disengaged state, and changes an operation state before the frictional elements proceed to the engaged state or the disengaged state, in accordance with whether the frictional elements have absorbed a predetermined heat quantity.

A method is provided to control an engine braking operation of a vehicle provided with a dual clutch transmission. The dual clutch transmission is adapted to be set into different gear-combinations, each including an active gear selection through which torque can be transmitted, and a passive gear selection through which no torque can be transmitted. In a pre-set number of gear-combinations, the first input shaft and the main shaft have a synchronised rotation. When an engine braking operation is performed when the transmission is set in one of the pre-set number of gear-combinations modifying said engine braking operation such that a damaging load upon said spigot bearing is reduced.

When throttle valve opening degree is larger than predetermined throttle valve opening degree Y in the case where a decision on shift to gear stage at which maximum load is applied to predetermined rotary member of automatic transmission is made, the gear stage is not formed. Therefore, large load is restrained from being applied to the predetermined rotary member of the automatic transmission. Besides, gear stage that is lower in vehicle speed than the gear stage by one stage or gear stage that is higher in vehicle speed than the gear stage by one stage is formed depending on whether acceleration requirement is large or small. Therefore, driving torque corresponding to the acceleration requirement is likely to be obtained. In consequence, the load applied to the predetermined rotary member of the automatic transmission can be reduced, and feeling of strangeness can be restrained from being caused by the driving torque.