modulatable power transmission clutch and a marine transmission

摘要

A transmission power (H) having an adjustable clutch (F, R) for power transmission mounted thereon and including plates interleaved clutch, the clutch (F, R) having a central axis (11) power transmission extending axially through said clutch (F, R) mounted thereon, the clutch (F, R) includes a movable piston (9) driven by a fluid to effect clutch operation by compression said plates, said piston having a large small areas (35) and (37) piston therein, the small area (35) piston is intended to have a fluid flow directed to it to a fluid pressure varying at said clutch (F, R) is adjustable, being intended large area (37) having a piston fluid flow directed thereto to effect maximum coupling and not modulable of said clutch (F, R); and valve SV sequence spring loaded and normally closed; said sequential valve (SV) serves to control the flow of fluid to said large area (37) of the piston in response to fluid pressure above a predetermined amount in said small area (35) of the piston, said valve (SV ) normally closed so that fluid pressure is directed to said small area (35) of the piston at a pressure variable fluid, whereby said clutch (F, R) is adjustable, and when said valve (SV) is opened by the action of said fluid pressure over a predetermined amount, allowing fluid flow to said large area (37) piston to make up and not adjustable engagement of said clutch (F, R) for the full capacity of the clutch, wherein said sequence valve (SV) is mounted on the outside of said transmission case (M) and is accessible from the outside thereof.