Most CVT cars in Indonesia use this design, and it works nothing like Toyota’s hybrid eCVT. Here the engine drives a pulley made of two cones; squeezing the cones together pushes the steel belt outward, while the other pulley opens and lets it sink in. The belt length never changes, so the two radii always trade off, and the ratio slides from about 2.5:1 to 0.41:1 without a single gear change. Compare it with the hybrid’s planetary gearset in How Toyota’s eCVT Works. Ratio range and dimensions are typical published values and estimates, labelled in the model.
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Belt CVT: How It Works
A 3D take-apart model of the steel push-belt CVT in the Avanza, Veloz, Brio and City: two cone pulleys squeeze a steel belt to change ratio smoothly, with live rpm, belt radius and a ratio-vs-speed chart.
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