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 transfer case comprises a primary output shaft, a secondary output shaft, a clutch, and a plurality of valves. The primary output shaft includes a hub rotationally coupled thereto. The clutch is selectively couples the primary output shaft to the secondary output shaft to transfer torque therebetween. The clutch includes a housing, interleaved plates, and an apply plate. The housing is rotationally coupled to the secondary output shaft. The interleaved plates alternate between a first subset of the interleaved plates rotationally coupled to the hub, and a second subset of the interleaved plates rotationally coupled to the housing. The apply plate compresses the interleaved plates for transferring torque between the hub and the housing. The valves selectively release oil supplied through the primary output shaft into the housing. Each valve includes a bore formed in the hub and a valve rod movable by the apply plate to open the valve.

An oil supply system for a vehicle transmission includes a pump drivable by two drive sources, and a hydraulic control unit including multiple control valves for distributing oil to consumers of the oil supply system. The drive power of the two drive sources are combined by a planetary gear set having an element connected to a pump drive shaft of the pump. A method for supplying the consumers of the oil supply system includes determining an overall oil flow requirement in the oil supply system and an oil flow requirement of consumers in an oil supply circuit of the transmission. The method further includes calculating a drive parameter for at least one of the two drive sources based at least in part on the oil flow requirements. Additionally, the method includes outputting the drive parameter as a specified value for controlling the at least one of the two drive sources.

Among other things, this document describes systems, devices, and methods for improving the delivery and performance of web pages authored to produce virtual reality (VR) or augmented reality (AR) experiences. In some embodiments, such web pages are analyzed. This analysis may be initiated at the request of a content server that receives a client request for the HTML. The analysis may involve, asynchronous to the client request, loading the page into a non-user-facing browser environment and allowing the VR or AR scene to execute, even including executing animation routines for a predetermined period of time. Certain characteristics of the scene and of objects are thereby captured. Based on this information, an object list ordered by loading priority is prepared. Consulting this information in response to subsequent requests for the page, a content server can implement server push, early hints and/or other delivery enhancements.

An actuator system for a vehicle transmission includes an actuating unit and an electric motor drivingly connected to the actuating unit. The actuating unit is configured for displacement by the electric motor between an engagement mode where the transmission is connected to a propulsion unit and a disengagement mode where the transmission is disconnected from the propulsion unit. A clutch unit between the actuating unit and the electric motor is connected to a drive shaft of the electric motor. The clutch unit is configured for connecting the actuating unit to the electric motor when displacing the actuating unit between the engagement disengagement modes. The clutch unit disconnects the actuating unit from the electric motor in the engagement mode. The system further includes an oil pump unit driven by the electric motor at least in the engagement mode.

A hydraulic system of a transmission having a controller and a variable displacement pump. The pump includes an inlet and outlet and is adapted to be driven by a torque-generating mechanism. The system also includes a lube circuit fluidly coupled to the pump. A lube regulator valve is disposed in the lube circuit, such that the lube regulator valve is configured to move between at least a regulated position and an unregulated position. The regulated position corresponds to a regulated pressure in the lube circuit. A pressure switch is fluidly coupled to the lube regulator valve and configured to move between a first position and a second position, where the switch is disposed in electrical communication with the controller. A solenoid is disposed in electrical communication with the controller and is controllably coupled to the pump to alter the displacement of the pump.

A control device for an automatic transmission is provided, which includes a friction engagement element, and a processor configured to execute gear change control logic configured to control a gear change operation by supplying and discharging hydraulic fluid for forming a gear stage to/from the friction engagement element, and lubricant supply control logic configured to control to switching operation of a supply amount of lubricant to the friction engagement element according to an operating state of a vehicle. The processor controls the gear change operation and the switching operation to not overlap with one another.

A hydraulic arrangement for a vehicle transmission includes a hydraulic pump for providing a system pressure for a first hydraulic system circuit and a lubrication pressure for a second hydraulic lubrication circuit. The arrangement also includes a control valve connected between a pump outlet of the pump and the two hydraulic circuits and has two different switching positions. The control valve, depending on its switching position, acts as a hydraulic connection between the pump and the system circuit or between the pump and the lubrication circuit.

A transmission, includes a transmission mechanism including a torque converter having a lock-up clutch; an oil pump configured to discharge an oil to be supplied to the transmission mechanism; a lock-up oil pressure control valve configured to adjust a pressure of the oil discharged from the oil pump and supply the oil to the lock-up clutch; a lubricating oil pressure control valve configured to adjust the pressure of the oil discharged from the oil pump and supply the oil to a portion to be lubricated of the transmission mechanism; and a controller configured to control the lock-up oil pressure control valve. The controller controls the lock-up oil pressure control valve so that a precharge time when a lubricating oil pressure which is an oil pressure supplied from the lubricating oil pressure control valve is a first lubricating oil pressure becomes shorter than another precharge time when the lubricating oil pressure is a second lubricating oil pressure which is lower than the first lubricating oil pressure when performing a precharge of supplying the oil to the lock-up clutch.

A hydraulic control device for an auto transmission may include: an oil pump unit configured to supply oil; a line pressure control unit configured to form line pressure using the oil supplied from the oil pump unit; a lubricating pressure control unit configured to form lubricating pressure using the oil passing through the line pressure control unit; a reducing pressure control unit configured to form reducing pressure using the oil passing through the lubricating pressure control unit; a damper control pressure control unit configured to form damper control pressure using the oil supplied from the oil pump unit; a switch unit configured to supply the lubricating pressure or the reducing pressure to a torque converter; a collection unit configured to collect the lubricating pressure; and a retention unit connected to the switch unit, and configured to retain the lubricating pressure of the torque converter.