Patent ID: 8634997

Claim:
A control system for controlling clutches of a dual clutch transmission comprising: an internal model based force control algorithm that converts a desired clutch force to a pressure control signal, the internal model including a gain, an integrator, a first function and a second function; a pressure control valve that receives the pressure control signal; a hydraulic actuator, the pressure control valve applying pressure to the hydraulic actuator, the applied pressure being related to the pressure control signal; and a clutch assembly with a stiff spring lever and a plurality of clutch plates, wherein the hydraulic actuator applies a force corresponding to the pressure control signal to a distal end of the spring lever, and wherein the force applied to the distal end of the spring lever imparts an actual force to the clutch plates, wherein the first function maps a steady state actual clutch force to the pressure in the hydraulic actuator corresponding to the pressure control signal sent to the pressure control valve, the hydraulic actuator applying a pressure to a spring lever which in turn imparts an actual clutch force to a plurality of clutch plates, and wherein the second function models the linear damping and friction characteristics of the pressure control valve, the hydraulic actuator, the spring lever, and the plurality of clutch plates.