Abstract: A rotary union for connecting to a shaft includes a female part, a male part rotatable relative to the female part on an axis of rotation, and a first primary conduit. The first primary conduit includes a female conduit portion formed by the female part, and a male conduit portion formed by the male part. The rotary union forms a first coupling between the female conduit portion and the male conduit portion. The female part further forms an annular seat facing the male part. The rotary union further includes a primary seal in the annular seat that is configured to radially seal to the male part and to shift in position away from the first coupling along the axis of rotation and to axially seal to the female part at an increase in pressure of a first primary fluid in the first coupling.

Abstract: A gearbox for a road vehicle includes a gearbox case, a first shaft, and a second shaft, wherein the first shaft has a first end and a second end, the first end being configured to receive torque. A plurality of first gear assemblies is located inside the gearbox case, wherein each of the first gear assemblies includes a first gear wheel positioned on the first shaft, and a second gear wheel positioned on the second shaft. A starter-gear wheel is positioned on and attached to the first shaft, wherein the plurality of first gear assemblies is located between the starter-gear wheel and the first end of the first shaft.

Abstract: A gearbox (10) is provided having: a gearbox case (12), a first shaft (14) for receiving torque, a second shaft (16) for transferring torque inside the gearbox case (12), and a third shaft (18) for delivering torque. The gearbox further has three or more first gear assemblies (20) located inside the gearbox case (12), wherein each first gear assembly (20) comprises a first gear wheel (22) centered on the first shaft (14), a second gear wheel (24) centered on the second shaft (16), and a wet clutch (26) configured for operationally connecting the first shaft (14) and the second shaft (16). The gearbox also has three or more second gear assemblies (30) located inside the gearbox case (12), wherein each second gear assembly (30) comprises a third gearwheel (32) centered on the second shaft (16), a fourth gear wheel (34) centered on the third shaft (18), and a wet clutch (36) configured for operationally connecting the second shaft (16) and the third shaft (18).

Abstract: A gear assembly (8) for mounting on a shaft (12) is described. The gear assembly (8) comprises: a gear wheel (80) configured to be rotationally supported with respect to the shaft (12) and a multiple-plate wet clutch (10). The wet clutch (10) comprises: a front part (34), a back part (42), a clutch basket attached to the gear wheel (80), and a clutch pack (20) connecting the clutch hub (16) and the clutch basket (18) and positioned between the front part (34) and the back part (42). The clutch pack (20) has: an unengaged state in which the clutch hub (16) and the clutch basket (18) are unlocked, and an engaged state in which the clutch hub (16) and the clutch basket (18) are locked together, wherein the back part (42) is spaced apart from the gear wheel (80) in the unengaged state, and the back part (42) engages the gear wheel (80) in the engaged state.

Abstract: A gear assembly (8) for mounting on a shaft (12) is described. The gear assembly (8) comprises: a gear wheel (80) configured to be rotationally supported with respect to the shaft (12) and a multiple-plate wet clutch (10). The wet clutch (10) comprises: a front part (34), a back part (42), a clutch basket attached to the gear wheel (80), and a clutch pack (20) connecting the clutch hub (16) and the clutch basket (18) and positioned between the front part (34) and the back part (42). The clutch pack (20) has: an unengaged state in which the clutch hub (16) and the clutch basket (18) are unlocked, and an engaged state in which the clutch hub (16) and the clutch basket (18) are locked together, wherein the back part (42) is spaced apart from the gear wheel (80) in the unengaged state, and the back part (42) engages the gear wheel (80) in the engaged state.

Abstract: A wet clutch (10) for mounting on a shaft (12) having an internal shaft conduit (88) for a hydraulic fluid is provided. The wet clutch (10) comprises: a clutch hub (16) configured to be mounted on the shaft (12), a clutch basket (18) configured to be rotationally supported relative to shaft (12), and a clutch pack (20) operationally connecting the clutch hub (16) and the clutch basket (18). The wet clutch (10) further comprises: a front part (34) configured to be fixed relative to the shaft, an actuator (22) supported by the front part (34) and radially spaced apart from the shaft (12), wherein the actuator (22) is configured to operationally connected to the shaft conduit (88). The wet clutch (10) further comprises: one or more relief valves (102) connected to the actuator and configured to release the hydraulic fluid.

Abstract: A liquid heat transfer mixture comprises a mixture of a liquid perfluoropolyether and a liquid alkoxy-perfluoroalkane, wherein the volume ratio of the liquid perfluoropolyether to the liquid alkoxy-perfluoroalkane is from 20:80 to 80:20. Use of the liquid heat transfer mixture is also disclosed.

Abstract: A multiple-plate wet clutch for mounting on a shaft having an internal shaft conduit for a coolant has a clutch hub mounted on the shaft, a clutch basket rotationally supported relative to shaft, a clutch pack operationally connecting the clutch hub and the clutch basket, and a collar mounted on the shaft. The wet clutch further has a plurality of clutch conduits, each having a collar portion formed by the collar and a hub portion formed by the clutch hub. The collar portion has an inlet for receiving the coolant, and the hub portion has one or more outlets at the clutch pack for releasing the coolant. The wet clutch further has a plurality of valves, each connected to a clutch conduit to control the flow of coolant through the clutch conduit. An actuator, supported by the collar, is configured to simultaneously engage the clutch pack and operate the valves.

Abstract: A gearbox (10) is provided having: a gearbox case (12), a first shaft (14) for receiving torque, a second shaft (16) for transferring torque inside the gearbox case (12), and a third shaft (18) for delivering torque. The gearbox further has three or more first gear assemblies (20) located inside the gearbox case (12), wherein each first gear assembly (20) comprises a first gear wheel (22) centered on the first shaft (14), a second gear wheel (24) centered on the second shaft (16), and a wet clutch (26) configured for operationally connecting the first shaft (14) and the second shaft (16). The gearbox also has three or more second gear assemblies (30) located inside the gearbox case (12), wherein each second gear assembly (30) comprises a third gearwheel (32) centered on the second shaft (16), a fourth gear wheel (34) centered on the third shaft (18), and a wet clutch (36) configured for operationally connecting the second shaft (16) and the third shaft (18).

Abstract: A method for manufacturing a fiber reinforced structure includes the following. A mandrel of a first material comprises a hollow interior and an aperture that allows a fluid to enter the interior. A layer of a second material provided on the mandrel includes an uncured resin and fibers. The mandrel and the layer are placed in a mold cavity formed by a mold. A pressurized fluid is introduced into the interior of the mandrel via the aperture to generate a force acting to expand the mandrel outward. The mandrel is heated so that it becomes deformable and expand outward to press the layer against the mold. The layer is heated so that it cures. The mandrel is then heated to a temperature above its melting point of the first material so that it melts, after which it is removed.

Abstract: A multiple-plate wet clutch for mounting on a shaft having an internal shaft conduit for a coolant has a clutch hub mounted on the shaft, a clutch basket rotationally supported relative to shaft, a clutch pack operationally connecting the clutch hub and the clutch basket, and a collar mounted on the shaft. The wet clutch further has a plurality of clutch conduits, each having a collar portion formed by the collar and a hub portion formed by the clutch hub. The collar portion has an inlet for receiving the coolant, and the hub portion has one or more outlets at the clutch pack for releasing the coolant. The wet clutch further has a plurality of valves, each connected to a clutch conduit to control the flow of coolant through the clutch conduit. An actuator, supported by the collar, is configured to simultaneously engage the clutch pack and operate the valves.

Abstract: A powertrain (12) for a vehicle (10) is disclosed. The powertrain (12) comprises: a combustion engine (24), (ii) a drivetrain (14) having a torque converter (32) with a first state of operation in which the input (34) of the torque converter (32) is locked to the output (36) of the torque converter (32) and a second state of operation in which the input (34) of the torque converter (32) is not locked to the output (36) of the torque converter (32) for allowing slippage. The drivetrain also has a final drive (44) for supplying torque to the drive wheel (16) from the torque converter (32), wherein the final drive (44) is coupled to the torque converter (32) at a fixed gear ratio. The powertrain (12) further comprises: (iii) a first electric motor (28) configured to supply torque to the drivetrain (14) on the output-side of the torque converter (32).

Abstract: A door hinge is attached by a base to a road vehicle. The door hinge carries a side door via a door mount, and it enables the door, when it is being opened, to be shifted upwards while at the same time shifting in an outward direction and rotating in a plane that is transverse to the outward direction. This decreases the risk of a lowermost parts of the side door hitting, e.g., a roadside curb near which the road vehicle is parked.

Abstract: A door hinge is attached by a base to a road vehicle. The door hinge carries a side door via a door mount, and it enables the door, when it is being opened, to be shifted upwards while at the same time shifting in an outward direction and rotating in a plane that is transverse to the outward direction. This decreases the risk of a lowermost parts of the side door hitting, e.g., a roadside curb near which the road vehicle is parked.

Abstract: A combustion engine includes, a cylinder head including a controllable first engine valve arranged to selectively open/close a combustion chamber included in the combustion engine, a first valve actuator operatively connected to the first engine valve, which first valve actuator includes at least one inlet opening for pressure fluid and at least one outlet opening for pressure fluid, and a closed pressure fluid circuit, wherein the first valve actuator is arranged in the closed pressure fluid circuit. The combustion engine further includes a cylinder head chamber that forms part of the closed pressure fluid circuit and that is delimited by the cylinder head and at least a first cylinder head mantle, wherein the at least one outlet opening of the first valve actuator is in fluid communication with the cylinder head chamber. A mantle assembly for a cylinder head of a combustion engine is also described.

Abstract: A combustion engine includes, a first controllable engine valve (8) arranged to selectively open/close a combustion chamber (7) included in the combustion engine (1), and a gas handling system arranged to drive the first engine valve (8), which gas handling system includes a closed pneumatic pressure fluid circuit, wherein the closed pressure fluid circuit includes, coupled in series with each other, a compressor (31) and a valve actuator (10) that are operatively connected to the first engine valve (8). The combustion engine is characterized by the gas handling system further including a gas accumulator (38) that is connected with the closed pressure fluid circuit via at least one gas accumulator conduit (39), which includes a controllable valve (40). A gas handling system for pneumatic control of a valve actuator is also described.

Abstract: A combustion engine includes a cylinder head including a controllable engine valve configured to open/close a combustion chamber in the combustion engine, a valve actuator operatively connected with and configured to displace the engine valve, and a closed pressure fluid circuit, wherein the valve actuator is arranged in the closed pressure fluid circuit. The combustion engine includes a cylinder head chamber that is included in the closed pressure fluid circuit and that is delimited by the cylinder head and a cylinder head mantle, by the valve actuator including a pneumatic pressure fluid circuit with an outlet opening that is in fluid communication with the cylinder head chamber, and by the cylinder head chamber including a hydraulic liquid drainage valve, wherein a drainage conduit stretches from the hydraulic liquid drainage valve to a hydraulic liquid vessel of the combustion engine for draining hydraulic liquid accumulated in the cylinder head chamber.

Abstract: A method for manufacturing a fiber reinforced structure includes the following. A mandrel of a first material comprises a hollow interior and an aperture that allows a fluid to enter the interior. A layer of a second material provided on the mandrel includes an uncured resin and fibers. The mandrel and the layer are placed in a mold cavity formed by a mold. A pressurized fluid is introduced into the interior of the mandrel via the aperture to generate a force acting to expand the mandrel outward. The mandrel is heated so that it becomes deformable and expand outward to press the layer against the mold. The layer is heated so that it cures. The mandrel is then heated to a temperature above its melting point of the first material so that it melts, after which it is removed.

Abstract: A powertrain (12) for a vehicle (10) is disclosed. The power-train (12) comprises: a combustion engine (24), (ii) a drivetrain (14) having a torque converter (32) with a first state of operation in which the input (34) of the torque converter (32) is locked to the output (36) of the torque converter (32) and a second sate of operation in which the input (34) of the torque converter (32) is not locked to the output (36) of the torque converter (32) for allowing slippage. The drivetrain also has a final drive (44) for supplying torque to the drive wheel (16) from the torque converter (32), wherein the final drive (44) is coupled to the torque converter (32) at a fixed gear ratio. The powertrain (12) further comprises: (iii) a first electric motor (28) configured to supply torque to the drivetrain (14) on the output-side of the torque converter (32).

Abstract: A combustion engine includes, a cylinder head including a controllable first engine valve arranged to selectively open/close a combustion chamber included in the combustion engine, a first valve actuator operatively connected to the first engine valve, which first valve actuator includes at least one inlet opening for pressure fluid and at least one outlet opening for pressure fluid, and a closed pressure fluid circuit, wherein the first valve actuator is arranged in the closed pressure fluid circuit. The combustion engine further includes a cylinder head chamber that forms part of the closed pressure fluid circuit and that is delimited by the cylinder head and at least a first cylinder head mantle, wherein the at least one outlet opening of the first valve actuator is in fluid communication with the cylinder head chamber. A mantle assembly for a cylinder head of a combustion engine is also described.