variable speed transmission

Considering the financial savings involved in building transmissions with just three moving parts, you’ll realize why car companies have become very interested in CVTs lately.

All of this may audio complicated, but it isn’t. In theory, a CVT is much less complex than a normal automatic transmission. A planetary Variable Speed Transmission equipment automatic transmission – sold in the tens of millions this past year – has hundreds of finely machined moving parts. It provides wearable friction bands and elaborate electronic and hydraulic settings. A CVT like the one defined above has three simple moving parts: the belt and both pulleys.

There’s another benefit: The lowest and best ratios are also additional apart than they would be in a typical step-gear transmitting, giving the transmitting a greater “ratio spread” This implies it is even more flexible.

The engine can always run at the optimum speed for power or for fuel economy, whatever the wheel speed, which means no revving up or down with each gear change, and the ideal rpm for the right speed continuously.

As a result, rather than five or six ratios, you get an infinite number of ratios between the lowest (smallest-diameter pulley setting) and highest (largest-diameter pulley environment).

Here’s an example: When you start from an end, the control computer de-clamps the input pulley so the belt turns the tiniest diameter while the output pulley (which goes to the wheels) clamps tighter to help make the belt change its largest diameter. This creates the lowest gear ratio (say, 3.0-to-1) for the quickest acceleration. As velocity builds, the pc varies the pulley diameters, as conditions dictate, for the best balance of fuel economic climate and power.