192 clutches and power-stop control – Field responsive frictional media type
Patent
1997-05-23
1998-10-20
Lorence, Richard M.
192 clutches and power-stop control
Field responsive frictional media type
19211331, F16D 3500
Patent
active
058233091
ABSTRACT:
A magnetorheological clutch for controllable torque transmission includes a housing defining a cavity with a rotary input element carrying at least one input clutch plate extending radially in the cavity. A rotary output element carrying at least one output clutch plate extends radially into the cavity adjacent the input clutch plate with a gap defined between the input clutch plate and the output clutch plate. A core formed of magnetically permeable material has a pair of side plates extending radially across the housing. A coil effective to establish an electromagnetic field is carried against the core. Magnetorheological fluid is carried in the cavity within the gap and is responsive to the electromagnetic field that is established by the coil through the core so that torque is transferred from the input clutch plate to the output clutch plate through the magnetorheological fluid. A series of radially extending cooling fins are positioned in the cavity, radially inside the input clutch plate and the output clutch plate so that generated heat is dissipated through the cooling fins by exposure to a circulating coolant fluid flowing about the cooling fins that enters and exits the cavity through a coolant flow path. Heat expansion of the magnetorheological fluid is accommodated by a thermal expansion chamber.
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Gopalswamy Swaminathan
Jones Gary Lee
General Motors Corporation
Lorence Richard M.
Sedlar Jeffrey A.
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