How Does An Automatic Transmission Work

Here you can get Automatic Transmission Working. The most common type of automatic transmission uses hydraulic power to shift gears. Here you can get How Automatic Transmission Works and Automatic Transmission combines a torque or fluid coupling converter with gearsets that provide the desired range of gears for the vehicle.

An Automatic Transmission is a multi-velocity transmission. Automatic Transmission is used in motor vehicles that doesn’t require any driver input to alternate gears under ordinary using conditions. The maximum common form of automatic transmission is the hydraulic automatic, which makes use of a planetary gearset, hydraulic controls, and a torque convertor.

Automatic Transmission Working

Automatic Gearbox Working

As you can see, there are a lot of moving parts inside an automatic transmission. It uses a combination of mechanical, fluid, and electrical engineering to give you a smooth ride from dead stop to highway cruising speed.

So let’s walk through a big picture overview of the power flow in an automatic transmission.

The engine sends power to the torque convertor’s pump. The pump sends power to the torque converter’s turbine via transmission fluid. The turbine sends the transmission fluid back to the pump via the stator. The stator multiples the power of the transmission fluid, allowing the pump to send more power back to the turbine. A vortex power rotation is created inside the torque converter.

The turbine is connected to a central shaft that connects to the transmission. As the turbine spins, the shaft spins, sending power to the first planetary gear set of the transmission. Depending on which multiple disc clutch or brake band is engaged in the transmission, the power from the torque converter will either cause the sun gear, the planetary carrier, or the ring gear of the planetary gear system to move or stay stationary.

Depending on which parts of the planetary gear system are moving or not determines the gear ratio. Whatever planetary gear arrangement you have (sun gear acting as input, planetary carrier acting as output, ring gear stationary — see above) will determine the amount of power the transmission sends to the rest of the drive train.

History of the Automatic Transmission

General Motors and REO each launched semi-automatic vehicle transmissions in 1934. These fashions posed fewer demanding situations than the conventional manual transmission however nonetheless required the usage of a take hold of to change gears. The GM transmission turned into the primary of its type to apply a hydraulically managed planetary gearbox, permitting the gears to shift relying on the vehicle’s travel speed.

Although GM was the first to use the version with hydraulic controls, this technology actually dates to a 1900 invention by Wilson-Pilcher. That innovation consisted of four forward gears on two trains that could be shifted with a single lever.

What Is Automatic Gearbox

An automatic transmission is a multi-speed transmission used in motor vehicles that does not require any driver input to change gears under normal driving conditions. The most common type of automatic transmission is the hydraulic automatic, which uses a planetary gearset, hydraulic controls, and a torque convertor.

The traditional automatic transmission is likewise referred to as torque converter automatic and it’s far the regularly used self-shifting technology across maximum vehicles. It makes use of a hydraulic fluid coupling or a torque converter to do the process of converting gears in preference to a clutch.


The vehicle’s Engine Control Unit (ECU) is at once related to the machine to allow easy and specific engine manage of the vehicle. This generation In India, automakers like Hyundai, Mercedes-Benz, BMW, Audi use the automatic transmission generation in a lot of their automobiles and SUV’s.

Types of Automatic Transmission

Automatic Transmission is four types flowing below points.

Automated Manual Transmission (AMT)

You is probably pretty acquainted with this name as it’s miles one of the maximum common Automatic Transmission available in India. It can be the maximum a hit in the Indian market but it doesn’t make it the best.

Automated Manual Transmission uses a myriad of hydraulic systems linked to an ECU which changes gear depending on the current RPM of the car. It as being a manual transmission that works on its own, hence the name. Most cars offer you the choice of ignoring the automated gearshift and allow you to change the gear manually. 

Using the same system as a manual transmission makes it each inexpensive and much less complex to paintings with. The ECU then operates the hydraulic structures gift in the engine. The ECU with its manufacturing facility set analyzing of equipment shift at sure RPM makes the hydraulic structures paintings therefore moving the gears.

Continuously Variable Transmission (CVT)

Continuously Variable Transmission is the up and coming Automatic transmission system in India. Having infinite gear ratio is its biggest advantage over other transmission options.

Continuously Variable Transmission employs the use of belts and pulleys to have an infinite gear ratio. In the case of Continuously Variable Transmission, fuel efficiency is the best in class as the engine is always working at the RPM where it’ll be efficient due to infinite gear ratio changing themselves whenever necessary.

Dual Clutch Transmission

With its multiple clutches, shafts, and gears, Dual Clutch Transmission might be one of the extra complicated transmission systems. It gives each high-pace gear shifts along the performance equal to a guide transmission Dual Clutch Transmission has been slowly growing in the Indian market. Given different names by different companies using it, Dual Clutch Transmission is the basic names it’s known by. Volkswagen calls it DSG, Porsche PDK.

Dual Clutch Transmission in simple terms can be described as two manual transmissions that are automatically controlled. The working is far more intricate so let’s get to it.

Intelligent Manual Transmission (iMT)

Another variant of Automated Manual Transmission the Intelligent Manual Transmission (that’s the call it’s now no longer a typo) additionally makes use of guide transmission as its base and makes it automatic. In the case of an Intelligent Manual Transmission, you’re in manipulate of the gearbox as a normal manual transmission but you manipulate the gears at the same time as the auto controls the clutch.

If you remember the biggest issue about AMT was its random gear changes. Intelligent Manual Transmission, however, picks this fault and provides you with full control over the gear shifting. This common ground between manual and automatic is sure to please any manual transmission lover.

With the help on an Intention sensor on the gear shift stick the Hyundai’s iMT knows when you are about to switch gears. When the sensor gets a reading from the TGS it actuates the clutch thus preparing itself for a gear shift. This allows the driver to shift gears without taking care of the clutch as its automatically pressed by the car itself. 

Advantages of Automatic Gearbox

  • The most important advantage of an automatic transmission is the capacity to pressure with out the want for a snatch as is needed with a manual transmission. Individuals with many disabilities are able to pressure using an automated due to the fact operation most effective calls for usable limbs.
  • The lack of a clutch also eliminates the need to pay attention to shifting manually and monitoring the tachometer to make the necessary shifts, which gives you more attention to focus on the task of driving.
  • Many drivers also find it easier to control an automatic transmission at low speeds than a manual transmission. The hydraulic automatic transmission creates a phenomenon called idle creep, which encourages the vehicle to move forward even when idling.

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