What Is Automatic Gearbox

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 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.

Automatic Gearbox Working

Most modern automatic gearboxes have a set of gears known as a planetary or epicyclic gear train. A planetary equipment set includes a imperative equipment known as the solar equipment, an outer ring with inner equipment teeth (also referred to as the annulus, or ring gear ), and or 3 gears referred to as planet gears that rotate among the solar and ring gears.

The drive train is coupled to a mechanism known as a torque converter , which acts as a fluid drive between the engine and transmission. If the sun gear is locked and the planets driven by the planet carrier, the output is taken from the ring gear, achieving a speed increase. If the ring gear is locked and the sun gear is driven, the planet gears transmit drive through the planet carrier and speed is reduced. With power input going to the sun gear and with the planet carrier locked, the ring gear is driven, but transmits drive in reverse. To achieve direct drive without change of speed or direction of rotation, the sun is locked to the ring gear and the whole unit turns as one.

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.

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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