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What is a CVT gearbox?

In this article, we explain the principles of a CVT gearbox and why it has become so popular amongst automakers.

Buying a Car2 min read

The Continuously Variable Transmission (CVT) gearbox revolutionises the driving experience with its seamless shifting and improved efficiency. But what exactly is a CVT gearbox, and why should you consider it when purchasing your next vehicle? Let's delve into the world of CVT transmissions to uncover their benefits and workings.

But before you search for new or used models on AutoTrader fitted with a CVT transmission, remember that you can sell your car quickly and easily on our website here.


Related: What is a torque converter?


What is a CVT Gearbox?

A CVT gearbox is an automatic transmission system that provides an infinite number of gear ratios, unlike traditional transmissions with fixed gears. This innovative design allows for smoother acceleration and enhanced fuel efficiency.

Types of CVT Transmissions

Pulley-Based CVT:

This type of CVT uses a system of pulleys and belts or chains to vary the gear ratio continuously. As the vehicle accelerates, the pulleys adjust their diameters to maintain optimal engine speed, resulting in seamless acceleration without discrete gear shifts.

Toroidal CVT:

Toroidal CVT transmissions utilise discs and power rollers to vary the gear ratio continuously. By changing the contact radius between the discs and rollers, this type of CVT achieves smooth acceleration and efficient power transfer.

How CVT Gearboxes Work

CVT transmissions operate on the principle of maintaining the engine at its optimal speed, known as the "power band," for maximum efficiency. Here's a simplified explanation of their operation:

Variable Gear Ratio:

Unlike traditional transmissions with fixed gear ratios, CVT gearboxes continuously vary the gear ratio to keep the engine operating within its most efficient range.

Seamless Shifting:

Instead of discrete gear shifts, CVT transmissions provide smooth and uninterrupted acceleration by adjusting the transmission ratio incrementally.

Efficiency Optimization:

By constantly optimising the engine's speed, CVT gearboxes improve fuel efficiency and deliver a more refined driving experience compared to conventional automatic transmissions.


Related: Manual vs. Automatic Transmission - Which is best?


Considering a Car with CVT Transmission?

Choosing a vehicle equipped with a CVT gearbox offers several advantages for modern drivers:

Smooth Performance:

Experience seamless acceleration and smooth driving dynamics, especially in city traffic and on highways.

Improved Fuel Efficiency:

CVT transmissions optimise engine performance, leading to better fuel economy and reduced emissions.

Enhanced Driving Comfort:

Enjoy a relaxed driving experience with minimal noise and vibration, thanks to the seamless operation of CVT transmissions.

Conclusion

CVT gearboxes represent a significant leap forward in automotive technology, offering drivers a smoother, more efficient, and enjoyable ride. When considering your next vehicle purchase, explore the benefits of CVT transmission for a driving experience tailored to the demands of the modern road.

Author - Ryno Fourie

Written by Ryno Fourie

Ryno started his career capturing press images of the latest and greatest vehicles which have subsequently adorned the covers and pages of prominent motoring titles locally and internationally. After a short stint as a photography lecturer, he once again joined the automotive industry as a sub-editor and photographer for a local publication, however, currently, you will find him spending most of his time in the studio creating written, video, and photography content as part of the AutoTrader content team.Read more

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