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AssigneeBorg-Warner Automotive Transmission & Engine Components Corporation
InventorParviz Payvar
Estimating the term…
A groove pattern for the paper-based friction facing on a wet clutch to elize the surface temperature of the friction facings and thus increase the thermal capacity of the clutch where there is continuous slippage. The groove pattern includes one or more continuous annular grooves dividing the friction area into two or more annular bands and a plurality of cross grooves in each band which are angled with respect to a radius of the facing. The angled cross grooves increase in number in each band from the inner band to the outer band. The angled cross grooves extend at an acute angle (10-50 degrees) to such radius. Slip of the friction pair of plates cause a viscous pumping action. The cross groove angle in each band of the facing is preferably different so as to keep all the grooves filled with cooling oil. And, the cross-section of the cross grooves vary in their dimensions as between the bands. The disclosed 60.degree. waffle pattern includes annular bands and cross grooves extending from the inner to outer perimeters of the facing at an angle of 60 degrees to the radius of the metal clutch plate. The angled cross grooves of this pattern also provides viscous pumping of oil through the facing.
A friction facing for a wet clutch plate comprised of a paper-based annular facing on a metal plate, said facing extending between inner and outer diameters on the plate, the outer surface of said facing being grooved to receive coolant oil, the grooved facing being of a pattern comprising plural annular grooves dividing said facing surface into at least three annular bands, and a plurality of cross grooves connecting said bands, said cross grooves extending at an angle to a radius of said plate, said cross grooves connecting the inner diameter with the plural annular grooves and with said outer diameter, the said angled cross grooves causing viscous pumping of oil across the said facing.
A friction facing for a wet clutch plate having an annular facing extending between inner and outer diameters and a facing surface grooved to receive coolant, wherein the grooved facing surface has a pattern including one or more annular grooves intermediate the inner and outer diameters dividing said surface into two or more adjacent annular bands, and a plurality of cross grooves extending across each of said bands and disposed at an angle with respect to a radius of the plate, said angled cross grooves in the inner band being out of alignment with said angled grooves of the next adjacent outer band and connected to one another through said annular groove between the bands, the said angled cross grooves in each said band increasing in number from the inner band to the outer band that is next adjacent thereto.
A friction facing for a wet clutch plate comprised of an annular facing defined between inner and outer diameters and a facing surface grooved to receive coolant oil in a pattern comprising first and second annular grooves dividing said facing surface into three annular bands, and a plurality of radially directed cross grooves in each of said bands, said cross grooves extending at an angle to a radius of said annular facing, said cross grooves connecting the inner diameter with the first annular groove, connecting said first and second annular grooves and connecting said second annular groove with said outer diameter, the number of cross grooves in each band increasing from the inner to the outer band.
Dependencies are inferred from the claim text.