There is provided a method for producing a wet friction plate that can improve the retention property of lubricating oils in a fine groove formed by laser light. In a method for producing a wet friction plate (200), a friction material (210) is produced by sheet making processing in a first step. Thereafter, in a second step, a fine groove (211) is formed on the friction material (210). The friction material (210) is produced such that thermosetting resin therein is in a semi-cured state. The cross-sectional shape of the fine groove (211) is formed into a V shape by laser light. Subsequently, in a third step, the friction material (210) is disposed on a core metal (201) via an adhesive agent including thermosetting resin. Subsequently, in a fourth step, the friction material (210) is pressed while heated to crush the fine groove (211). In this manner, unevenness is formed on an intra-groove surface (212), and the thermosetting resin is completely cured.

A multiple disc clutch apparatus configured to reduce the drag torque, the sticking torque, and simultaneously the weight of the multiple disc clutch apparatus. The apparatus can comprise substantially annular multiple clutch discs connected to an input-side from an engine; substantially annular multiple clutch plates alternately laminated with the clutch discs and connected to an output-side to a wheel; and frictional members secured on surfaces of the clutch discs opposing the clutch plates and adapted to press-contact with or separate from the clutch plates. A power from the engine can be transmitted to the wheel when the clutch discs and plates are press-contacted with each other; the power transmission being blocked by releasing the press-contacting force; wherein depressions are formed on each clutch plate along its periphery and radially inward therefrom; and wherein a part of the one or more frictional members is positioned within a region of the depressions.

A multiple disc clutch apparatus configured to reduce the drag torque, the sticking torque, and simultaneously the weight of the multiple disc clutch apparatus. The apparatus can comprise substantially annular multiple clutch discs connected to an input-side from an engine; substantially annular multiple clutch plates alternately laminated with the clutch discs and connected to an output-side to a wheel; and frictional members secured on surfaces of the clutch discs opposing the clutch plates and adapted to press-contact with or separate from the clutch plates. A power from the engine can be transmitted to the wheel when the clutch discs and plates are press-contacted with each other; the power transmission being blocked by releasing the press-contacting force; wherein depressions are formed on each clutch plate along its periphery and radially inward therefrom; and wherein a part of the one or more frictional members is positioned within a region of the depressions.

Problem—To provide a friction plate with reduced drag torque.

Solution—The friction plate is formed with oil grooves having the sectorial shapes spreading toward the inner circumference and the perimeter. The adjacent edges of the friction material segments are provided with the perimeter side vertex and the inner circumference side vertex respectively. The sectorial oil groove opening toward the perimeter side from the inner circumferential side vertexes can discharge a lube oil to the perimeter side efficiently by a centrifugal force. Also, owing to the sectorial oil groove opening toward the inner circumference side from the perimeter side vertexes, a lube oil can be made to run aground onto the friction material segments due to a centrifugal force, thus, reducing the drag torque markedly compared with the conventional plates.

A cooling assembly fluidly communicating with a vehicle cooling system includes a coolant tube and a mounting plate. The cooling assembly is configured for cooling a support bearing disposed in a dual clutch transmission. The coolant tube includes (i) an inlet end that receives a cooling medium, (ii) an outlet end that returns the cooling medium to the vehicle cooling system and (iii) a heat transfer portion incorporated between the inlet end and the outlet end. The mounting plate has a plate body including a bearing opposing surface and a transmission housing opposing surface. The bearing opposing surface contacts the support bearing. The heat transfer portion of the coolant tube is attached to the mounting plate such that cooling medium communicated through the coolant tube reduces temperature of the mounting plate and therefore the support bearing.

A cooling assembly fluidly communicating with a vehicle cooling system includes a coolant tube and a mounting plate. The cooling assembly is configured for cooling a support bearing disposed in a dual clutch transmission. The coolant tube includes (i) an inlet end that receives a cooling medium, (ii) an outlet end that returns the cooling medium to the vehicle cooling system and (iii) a heat transfer portion incorporated between the inlet end and the outlet end. The mounting plate has a plate body including a bearing opposing surface and a transmission housing opposing surface. The bearing opposing surface contacts the support bearing. The heat transfer portion of the coolant tube is attached to the mounting plate such that cooling medium communicated through the coolant tube reduces temperature of the mounting plate and therefore the support bearing.

A hybrid module housing includes a bulkhead. The bulkhead has a first radial channel for providing a clutch apply pressure, a second radial channel for providing a clutch cooling flow, and a third radial channel for providing a motor cooling flow. In an example embodiment, the third radial channel is arranged to be on a bottom half of the hybrid module housing when the hybrid module housing is installed in a vehicle. In an example embodiment, the first radial channel and the second radial channel are open at a radially outer surface of the bulkhead, and the third radial channel is sealed at the radially outer surface of the bulkhead. In an example embodiment, the third radial channel includes an axial passage open at a radial wall of the bulkhead.

A hybrid module housing includes a bulkhead. The bulkhead has a first radial channel for providing a clutch apply pressure, a second radial channel for providing a clutch cooling flow, and a third radial channel for providing a motor cooling flow. In an example embodiment, the third radial channel is arranged to be on a bottom half of the hybrid module housing when the hybrid module housing is installed in a vehicle. In an example embodiment, the first radial channel and the second radial channel are open at a radially outer surface of the bulkhead, and the third radial channel is sealed at the radially outer surface of the bulkhead. In an example embodiment, the third radial channel includes an axial passage open at a radial wall of the bulkhead.

The present invention relates to an operating assembly for the mechanical connection of an engine to a work machine, comprising a drive shaft unit and an output shaft unit which are connected by means of a dynamically controllable multi-plate clutch, and comprising a holding brake acting upon the output shaft unit as well as a control unit, wherein the holding brake is a dynamically controllable brake.

The present invention relates to an operating assembly for the mechanical connection of an engine to a work machine, comprising a drive shaft unit and an output shaft unit which are connected by means of a dynamically controllable multi-plate clutch, and comprising a holding brake acting upon the output shaft unit as well as a control unit, wherein the holding brake is a dynamically controllable brake.