How an Automatic Transmission Works | Eric the Car Guy

What is an Automatic Transmission?

An automatic transmission is a type of transmission that automatically changes gears without the driver having to manually shift. This is in contrast to a manual transmission, which requires the driver to shift gears manually.

Automatic transmissions are more common than manual transmissions in the United States. They are also more popular in other countries, such as Japan and Europe.

How Does an Automatic Transmission Work?

An automatic transmission uses a series of gears to change the speed and torque of the engine. The gears are controlled by a computer, which uses sensors to determine the best gear for the current driving conditions.

The computer then sends a signal to the transmission, which shifts the gears accordingly.

Here is a more detailed look at how an automatic transmission works:

1. The driver starts the car and puts the transmission in gear.
2. The computer uses sensors to determine the best gear for the current driving conditions.
3. The computer sends a signal to the transmission, which shifts the gears accordingly.
4. The transmission uses a series of gears to change the speed and torque of the engine.
5. The car moves forward or backward, depending on which gear is selected.

Types of Automatic Transmissions

There are two main types of automatic transmissions:

* Conventional automatic transmissions use a planetary gearset to change gears.
* Continuously variable transmissions (CVTs) use a belt or chain to change gears.

Conventional automatic transmissions are the most common type of automatic transmission. They are found in most cars and trucks.

CVTs are a newer type of automatic transmission. They are found in some cars and hybrid vehicles.

Advantages of Automatic Transmissions

There are several advantages to using an automatic transmission:

* Ease of use: Automatic transmissions are much easier to use than manual transmissions. Drivers do not have to worry about shifting gears, which can be difficult to do smoothly.
* Fuel efficiency: Automatic transmissions can be more fuel-efficient than manual transmissions, especially in stop-and-go traffic.
* Convenience: Automatic transmissions are more convenient than manual transmissions. Drivers do not have to worry about shifting gears, which can be a hassle, especially in heavy traffic.

Disadvantages of Automatic Transmissions

There are also some disadvantages to using an automatic transmission:

* Cost: Automatic transmissions are more expensive to purchase and maintain than manual transmissions.
* Weight: Automatic transmissions are heavier than manual transmissions.
* Complexity: Automatic transmissions are more complex than manual transmissions, which can make them more difficult to repair.

Conclusion

Automatic transmissions are a popular choice for drivers who want an easy-to-use and convenient transmission. They are also more fuel-efficient than manual transmissions in stop-and-go traffic. However, automatic transmissions are more expensive and complex than manual transmissions, which can make them more difficult to repair.