Hydraulic control system for a continuously variable transmission

摘要

A hydraulic control system for a continuously variable transmission includes a pressure regulator subsystem, a ratio control subsystem, a torque converter control (TCC) subsystem, a variable lubrication control subsystem, a variator clamping subsystem, and a clutch control subsystem. The variable lubrication control subsystem allows for increased and decreased oil flow to components of the variable transmission based on demand. The pressure regulator subsystem provides binary line pressure control to the lubrication subsystem.

主权项

1. A system comprising:
a source of pressurized hydraulic fluid; a control valve assembly having an inlet, an outlet, and a spool moveable between a first position and a second position, wherein the inlet is in downstream fluid communication with the source of pressurized hydraulic fluid, and wherein spool prevents fluid communication from the inlet to the outlet when in the first position and wherein the spool allows fluid communication from the inlet to the outlet when in the second position; a bypass orifice having a first end in fluid communication with the outlet and a second end in fluid communication with the source of pressurized hydraulic fluid; a lubrication feed line in communication with the outlet and the first end of the bypass orifice; and a variator lubrication circuit in downstream fluid communication with the lubrication feed line.