초록 ▼

A rotary clutch assembly for a geared power transmission mechanism comprising a friction disc clutch with driving and driven friction clutch plates, the driving plates being connected to a torque input element of the clutch assembly and the driven plates being connected to a torque output element of

A rotary clutch assembly for a geared power transmission mechanism comprising a friction disc clutch with driving and driven friction clutch plates, the driving plates being connected to a torque input element of the clutch assembly and the driven plates being connected to a torque output element of the clutch assembly, the clutch assembly providing a torque flow path to multiple-ratio gearing, a pressure actuator comprising first and second annular cylinder members and a movable piston member located in one of the cylinder members and cooperating with each member to define a pressure release chamber and a pressure apply chamber, the second clutch member being held axially fast on a torque input shaft for the transmission, the geometry of the cylinder members and the movable piston being sized to effect a centrifugal balance so that the clutch gain is essentially determined by the clutch commanded pressure to produce a relatively speed-independent net clutch-apply force, regardless of clutch cylinder speed.

대표청구항 ▼

1. A rotary, pressure-actuated clutch assembly for a multiple-ratio power transmission mechanism comprising a torque input shaft;gearing defining torque flow paths from the torque input shaft to a driven element; a first rotary clutch member defining an annular clutch-apply pressure cylinder, a clut

1. A rotary, pressure-actuated clutch assembly for a multiple-ratio power transmission mechanism comprising a torque input shaft;gearing defining torque flow paths from the torque input shaft to a driven element; a first rotary clutch member defining an annular clutch-apply pressure cylinder, a clutch-apply piston in the clutch-apply pressure cylinder defining an apply pressure chamber; a second rotary clutch member in the clutch-apply piston; the second rotary clutch member and the clutch-apply piston defining a clutch-release pressure chamber; a clutch return spring between the second rotary clutch member and the clutch-apply piston urging the clutch-apply piston to a clutch released position; the clutch release pressure chamber and the clutch apply pressure chamber each having a dimensional centrifugal balance coefficient expressed as: (R02-Ri2)*[(R02+Ri2)÷4-(ri2÷2)]where:R0=piston outside diameter Ri=piston inside diameter ri=radius at which oil starts to rotate; the balance coefficient for the release pressure chamber being approximately equal to the balance coefficient for the apply pressure.