FLOW ACCUMULATOR AND CLUTCH CONTROL SYSTEM FOR AUTOMATIC TRANSMISSIONS

摘要

The present invention provides a flow accumulator and a clutch control system for an automatic transmission. The flow accumulator includes a dual area piston disposed in a complementary dual diameter cylinder. The small end of the piston is pressurized by fluid from a spool valve which supplies and exhausts fluid to the clutch. The large end of the piston displaces fluid into the clutch when the small end is pressurized. A flow restricting orifice is disposed in parallel with the flow accumulator between the spool valve and the clutch and a pair of check valves control fluid flow into and out of the larger diameter cylinder.