CVT SYSTEM


  1. CONSTRUCTION


    1. The widths of the grooves of the pulleys are changed through hydraulic control.

    2. During acceleration, the action of shift solenoid valve DS1 increases the fluid inflow volume to the primary pulley, thus narrowing the width of the pulley groove.

    3. During deceleration, the action of shift solenoid valve DS2 increases the outflow volume to the primary pulley, thus widening the width of the pulley groove.

    4. The secondary pulley is hydraulically controlled by shift solenoid valve SLS. Shift solenoid valve SLS controls the belt clamping pressure to ensure proper power transmission efficiency.

      A00YYFCC01
      *1 Secondary Pulley *2 Primary Pulley
      *3 Steel Belt - -
      *a Pulley Ratio (Low) *b Pulley Ratio (High)
      *c Groove Width (Large) *d Groove Width (Small)

    5. The primary pulley uses a double piston construction. 2 chambers generate hydraulic pressure to vary the groove width. This has resulted in a compact and lightweight assembly.

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      *a Pulley Ratio (Low) *b Pulley Ratio (High)
      A00YYHQ Chamber A A00YYP2 Chamber B

    6. The steel belt consists of elements and 2 rows of steel rings. In contrast to the chains and V-belts that transmit power through the use of tensile force, the steel belt uses the compressive action (pushing force) of the elements to transmit power.

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      *1 Steel Ring *2 Element

  2. OPERATION


    1. The changing of the pulley ratio is accomplished in a continuously variable manner by varying the widths of the grooves of the primary and secondary pulleys.

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      *1 Primary Pulley *2 Steel Belt
      *3 Secondary Pulley *4 Differential Ring Gear
      *5 Reduction Driven Gear *6 Reduction Drive Gear
      *7 Differential Drive Pinion *8 Forward Clutch
      *9 Input Shaft *10 Reverse Brake

      Figure 1. Pulley Ratio Low (Shift Lever in D)

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      *1 Primary Pulley *2 Steel Belt
      *3 Secondary Pulley *4 Differential Ring Gear
      *5 Reduction Driven Gear *6 Reduction Drive Gear
      *7 Differential Drive Pinion *8 Forward Clutch (On)
      *9 Input Shaft *10 Reverse Brake (Off)
      *a Groove Width (Large) *b Groove Width (Small)

      Figure 2. Pulley Ratio High (Shift Lever in D)

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      *1 Primary Pulley *2 Steel Belt
      *3 Secondary Pulley *4 Differential Ring Gear
      *5 Reduction Driven Gear *6 Reduction Drive Gear
      *7 Differential Drive Pinion *8 Forward Clutch (On)
      *9 Input Shaft *10 Reverse Brake (Off)
      *a Groove Width (Small) *b Groove Width (Large)

      Figure 3. Neutral (Shift Lever in N)

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      *1 Primary Pulley *2 Steel Belt
      *3 Secondary Pulley *4 Differential Ring Gear
      *5 Reduction Driven Gear *6 Reduction Drive Gear
      *7 Differential Drive Pinion *8 Forward Clutch (Off)
      *9 Input Shaft *10 Reverse Brake (Off)
      *a Groove Width (Large) *b Groove Width (Small)

      Figure 4. Reverse (Shift Lever in R)

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      *1 Primary Pulley *2 Steel Belt
      *3 Secondary Pulley *4 Differential Ring Gear
      *5 Reduction Driven Gear *6 Reduction Drive Gear
      *7 Differential Drive Pinion *8 Forward Clutch (Off)
      *9 Input Shaft *10 Reverse Brake (On)
      *a Groove Width (Large) *b Groove Width (Small)