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How an Automatic Transmission Works?

This is Flash animation of Automatic transmission. Automatic transmissions use planetary gear system to operate.

Please Also watch our YouTube video for more information about Automatic Transmission.

Fallowing descriptive images are taken from Garagevitesse web site

Deceleration

Power input: ring gear
Power output: planetary carrier

Stationary: sun gear
When the sun gear is held stationary, only the
pinion gear rotates and revolves. Therefore, the
output shaft decelerates in proportion to the input
shaft only by the rotation of the pinion gear.
Direct Coupling

Power input: sun gear, ring gear
Power output: planetary carrier

Ring gear rotates with the locked planetary carrier,
the input and output shafts rotate at the same rate.
Reverse Rotation

Power input: sun gear
Power output: ring gear

Stationary: Planetary carrier
When the planetary carrier is fixed in position and
the sun gear turns, the ring gear turn on its axis
and the rotational direction is reversed.

HINT:
The reference uses a model to explain the operation using different input and output shafts. In an actual vehicle, the construction is more complex in order to enable the planetary gear unit to appropriately shift gears, as shown by the left diagram.

Ukasha yusuf
01 Dec 2012

I am very happy with this service and sure that there is no one like you thanks

Venugopal
29 Dec 2012

Thank u so much for the video..

paul
10 Jan 2013

excellent description
to what could easily be a complicated answer
=^)

sam
17 Jan 2013

i am so happy to see that but want to know how does reverse gear work

pankaj
20 Jan 2013

Its super

tariq
27 Jan 2013

it really works

hemantkumar
04 Feb 2013

dear sir
input power planetary gear and output power sun gear and ring gear is fix what retio

bhanupratap
21 Apr 2013

really amazing animation ....to understand

Nelson
24 May 2013

Hi sir.

I am a commercial instructor in Brazil.
First to all, this animation is very good and I would like to use it in my classes. So I would like to Know if it's possible for you to send me this animation in flash player? If it's OK. Can I use in my classes?
Best regards

Nelson.

Add a comment or brief description of this mechanism in your language.

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