CVT SYSTEM


  1. CONSTRUCTION


    1. Transmission Valve Body Assembly


      1. The transmission valve body assembly consists of the upper and lower valve bodies and 5 shift solenoid valves.

      2. The 5 shift solenoid valves are installed in the lower valve body for serviceability.

        A00XRSXC01
        *1 Upper Valve Body *2 Lower Valve Body
        *3 Shift Solenoid Valve DS1 *4 Shift Solenoid Valve DS2
        *5 Shift Solenoid Valve DSU *6 Shift Solenoid Valve SLS
        *7 Shift Solenoid Valve SLT - -
        A00XROLC02
        *1 Primary Pulley *2 Secondary Pulley
        *3 Manual Valve *4 Shift Solenoid Valve DS1
        *5 Shift Solenoid Valve DS2 *6 Shift Solenoid Valve SLS
        *7 Shift Solenoid Valve SLT *8 Shift Solenoid Valve DSU
        *9 ECM - -
        *a MIN *b NT
        *c NOUT *d Valve Body
        *e Vehicle Speed Control *f Belt Clamping Pressure Control
        *g Line Pressure Control *h Lock-up Engagement Pressure Control
        *i Clutch Pressure Control - -

  2. OPERATION


    1. Steel Belt Clamping Force Control


      1. To ensure the proper control of the belt clamping pressure necessary for transmitting torque, the system controls the hydraulic pressure applied to the secondary pulley. The transmission valve body assembly is provided with a dedicated hydraulic pressure circuit for belt clamping pressure control. This circuit optimally controls the hydraulic pressure applied to the secondary pulley, thus achieving superior torque transmission performance.

        A00XRA0C01
        *1 Oil Pump Assembly *2 No. 3 Line Pressure Modulator Valve
        *3 Primary Regulator Valve *4 Clutch Apply Control Valve
        *5 Shift Solenoid Valve SLS *6 No. 1 Line Pressure Modulator Valve
        *7 Shift Solenoid Valve SLT *8 Primary Pulley
        *9 Secondary Pulley - -

    2. Speed Ratio Control (Shift Control)


      1. Pulley ratio control is effected by controlling the inflow and outflow of the CVT fluid to and from the primary pulley. Separate hydraulic circuits are provided for acceleration (fluid inflow) and deceleration (fluid outflow) in order to provide fine-tuned control and a high level of reliability.

        A00XRJAC01
        *1 Oil Pump Assembly *2 Shift Solenoid Valve DS1
        *3 Shift Solenoid Valve DS2 *4 Bypass Valve
        *5 No. 1 Ratio Control Valve (Acceleration Control) *6 No. 2 Ratio Control Valve (Deceleration Control)
        *7 Primary Pulley *8 Secondary Pulley