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Fig 1: Identifying Primary Pulley (Fixation Side), Secondary Side Oil Pressure Chamber And Primary Side Oil Pressure Chamber
| Callout | Component Name |
|---|---|
| 1 | Primary Pulley (Fixation Side) |
| 2 | Secondary Side Oil Pressure Chamber |
| 3 | Secondary Pulley (Mobile Side) |
| 4 | Primary Side Oil Pressure Chamber |
| 5 | Primary Pulley (Mobile Side) |
| 6 | Secondary Pulley (Fixation Side) |
Pulley Gear Shifting Operation
The movable sheave slides on the shaft to change the groove width of the pulley. Input signals of engine load (accelerator pedal opening), engine revolution and gear ratio (vehicle speed) change the operation pressures of the primary pulley and the secondary pulley, and controls the pulley groove width. Along with change of the pulley groove width, the belt contact radius is changed. This allows continuous and stepless gear shifting from low to overdrive. "The contact radius ratio of each pulley in contact with the belt x auxiliary gearbox gear ratio" is the gear ratio.