A lubrication and hydraulic actuation system for a transfer case (120) includes a pump (220), a pump sump (210) formed in the transfer case (120), and having an opening (430) in communication with an interior of the transfer case (120), and a fluid retention element (510, 710). The fluid retention element (510, 710) is disposed in the opening (430) of the pump sump (210) and has at least one baffle structure (550) to allow fluids to enter the pump sump (210) through the fluid retention element (510, 710) and restrain fluids from exiting the pump sump (210) through the fluid retention element (510, 710).

A hydraulic control device for an automatic transmission includes a shut-off valve arranged between a first pressure adjusting device and a respective shifting element cylinder of a plurality of shifting elements. In the first shifting position of the shut-off valve, the first pressure adjusting device is hydraulically connected to the respective shifting element cylinder through the shut-off valve. In the second shifting position of the shut-off valve, the shifting element cylinder is sealed by the shut-off valve relative to the first pressure adjusting device. The shut-off valve is an releasable check valve. The releasable check valve includes a check valve and an unblocking device. The unblocking device is actuatable by a control pressure from a second pressure adjusting device.

A control device for a vehicle includes: a coasting control unit configured to, during normal traveling at a low speed within a predetermined range, cause a vehicle to travel through inertia by blocking power transmission between an engine and driving wheels by disengaging a power transmitting/blocking device that includes a first engaging portion connected to the engine and a second engaging portion connected to the driving wheels, and by stopping the engine; and a return control unit configured not to full-engage the power transmitting/blocking device while the engine is cranking by a motor in a case of returning from coasting traveling to normal traveling and to full-engage the power transmitting/blocking device after the motor stops.

A speed change device that includes a first clutch that includes a first piston, a first engagement oil chamber, and a first clutch drum that has a first outer tubular portion which extends in an axial direction and with which an outer peripheral portion of a first friction engagement plate is fitted, and a second clutch that includes a second piston, a second engagement oil chamber, and a second clutch drum that has a second inner tubular portion that extends in the axial direction and that slidably supports an inner peripheral portion of the second piston.

A starting element with a friction clutch and a piston configured to actuate the friction clutch. The starting element includes a piston space separated from a residual space of the starting element at least partially by the piston, a first connection constructed such that the piston is acted upon by a hydraulic medium proceeding from one side of the residual space, and a second connection fluidically connected to the piston space. A maximum pressure present at the second connection is equal to and/or less than a pressure present at the first connection.

A clutch housing for a clutch assembly of a vehicle, the clutch housing comprising a fluid pathway at least partially disposed within a wall of the clutch housing, the fluid pathway forming at least a portion of a fluid line between a clutch slave cylinder and a clutch master cylinder, the fluid line being configured to transfer hydraulic fluid between the clutch slave cylinder and the clutch master cylinder.

A pipe joint has a tube for fluid detachably fitted thereto, and is connected to a hydraulic device such as a cylinder. The pipe joint is provided with a resin body into which the tube for fluid is inserted, and a metal body which can rotate relative to the resin body. The resin body comprises orifices which each have a different opening diameter, and, as a result of the rotation of the resin body relative to the metal body, the orifices can be disposed in a connection part providing a connection path between the tube for fluid and the hydraulic device.

A clutch control device is provided for a four-wheel drive vehicle. The clutch control device is able to suppress the elevation of the temperature of the oil supplied to a friction clutch during two-wheel drive travel when the friction clutch is released. The clutch control device includes a dog clutch and an electronic control coupling. The friction clutch is housed in a coupling case. When the dog clutch and the friction clutch are released, a two-wheel drive mode is selected. The coupling case has a passage opening that is closed to retain lubrication oil in an oil chamber with respect to a clutch chamber that houses the friction clutch. When oil stirring conditions are met thereafter, the passage opening is opened and the lubrication oil is allowed to flow into the clutch chamber from the oil chamber.

A coupling unit is disclosed which includes a sleeve opening that extends in the longitudinal direction and into which at least one medium-conveying plug element can be at least partially inserted, A support sleeve includes at least one circumferential pocket on an inner side that faces a plug element and defines the sleeve opening transverse to the longitudinal direction. A sliding element is arranged in the pocket and movably transferred from a release position into a coupling position during the insertion of the plug element. A sealing element is arranged between the sliding element and the pocket of the support sleeve in the release position and pre-stressed in the direction of the plug element. The sealing element is released by the sliding element in the coupling position in order to close and seal a potential gap formed between the support sleeve and the plug element.

A vehicle including an engine at a rear, and a clutch system including a hydraulic conduit passing below the vehicle and connecting a master cylinder placed at the front of the vehicle and a slave cylinder located at the rear thereof. The hydraulic conduit is positioned in a vicinity of a pre-existing heat source in the vehicle, to be heated by the heat source.