Cars with Variable Transmission

What is a Variable Transmission?

A variable transmission (VT) is a type of transmission that allows the driver to continuously vary the gear ratio between the engine and the wheels. This is in contrast to a conventional transmission, which has a limited number of fixed gear ratios.

VTs are typically used in cars and other vehicles that need to be able to operate over a wide range of speeds and loads. For example, VTs are often used in hybrid vehicles, which combine a gasoline engine and an electric motor. The VT allows the car to seamlessly switch between the two power sources, depending on the driving conditions.

Types of Variable Transmissions

There are two main types of VTs:

• Continuous variable transmissions (CVTs): CVTs use a belt or chain to transmit power from the engine to the wheels. The belt or chain is wrapped around two pulleys, and the diameter of the pulleys can be varied to change the gear ratio.
• Toroidal variable transmissions (TVTs): TVTs use a pair of discs to transmit power from the engine to the wheels. The discs are shaped like a torus, and the angle of the discs can be changed to change the gear ratio.

Advantages of Variable Transmissions

VTs offer a number of advantages over conventional transmissions. These advantages include:

• Improved fuel economy: VTs can help to improve fuel economy by keeping the engine operating at its most efficient speed.
• Smoother shifting: VTs provide smooth shifting, as there are no fixed gear ratios to shift between.
• Increased power: VTs can help to increase power by allowing the engine to operate at a higher speed under load.
• Reduced emissions: VTs can help to reduce emissions by keeping the engine operating at its most efficient speed.

Disadvantages of Variable Transmissions

VTs also have some disadvantages, including:

• Cost: VTs are typically more expensive than conventional transmissions.
• Complexity: VTs are more complex than conventional transmissions, which can make them more difficult to repair.
• Durability: VTs may not be as durable as conventional transmissions, especially in high-performance applications.

Conclusion

VTs offer a number of advantages over conventional transmissions, including improved fuel economy, smoother shifting, increased power, and reduced emissions. However, VTs are also more expensive, more complex, and less durable than conventional transmissions. Ultimately, the decision of whether or not to choose a car with a VT is a personal one that depends on the individual’s needs and preferences.