A Transmission

When it comes to We'll use an automatic transmission developed by Allison Transmission for t Automatic transmissions work based on the planetary gear set. In order to understand the process, let's take a look at the basic parts of planetary gear sets. Planetary gear sets have two inputs and one output. In automatic transmission, the output rotation is drawn from the planet carrier. The two inputs are connected to the ring and sun gears. Now, let'see what happens to the output speed when we apply different speeds to the inputs. Here, the ring gear is stationary and rotation is given exclusive to the sun gear. The ring gear is also rotating. The ring and sun gears rotate at the same speed. In the ring gear speed is increased further. Turning the sun gear in the opposite direction will result in a reverse gear. So, the operation of automatic transmission is all about transmitting different rotational speeds into the ring and sun gears. The beauty of automatic transmissions is that t In the coming sessions, we will see how t In an automatic transmission, there is no direct connection between the input and the output shafts. Rather, there is an intermediate shaft between the two. In addition, two clutch packs are used for transmitting power. Pressing the clutch plates together will lock the hub to the case. T With t If the first clutch pack is applied, the input shaft will connect to the intermediate shaft. On the other hand, if the second clutch pack is applied, the ring gear will connect to the case w In order to ac You can note that the input shaft will turn the sun gear. Since the ring gear is stationary, the output shaft will rotate as shown with almost one-the second clutch pack is applied, the ring gear will connect to the case w In order to ac You can note that the ring gear is stationary, just apply both the clutch packs together as shown with almost one-to ac It is clear that applying C1 will always rotate both the sun gears at the input shaft speed. If we apply C4 as well, the planetary gear of the second set will turn. But here's the tricky part. T So, when C1 and C4 are applied together, the ring gear of the output set will turn. Thus, at the output set, the situation is similar to that of the first gear, except that here the ring gear will rotate as well. The planetary gear is also fitted with a hollow shaft. Take a moment to observe and understand the rest of the process will be easy. With t We know, in order to get a direct drive, the ring and sun gears of the output set should rotate at the speed of the input shaft. If we apply C1 and C2, the sun and ring gears will be directly connected to the input shaft. In order to ac Here, at the second set, the input rotation is given to the carrier and the ring gear is stationary. Thus, we can ac A the sun gear of t And here again, the output of the set is connected to the input of the adjacent set. T For the remaining gear ratios, C3 is always applied. For the t For the fifth gear, remove C1 and apply C2. In order to go in reverse, apply the ring gear clutch C5 as well. Since the planet gears of the second set are the same, the output of the second set is always connected to the input shaft. With the same ring gear, the output of the they will spin as shown here. T Consequently, the final output will be a rotation in the opposite direction. A transmission control unit will decide when to apply w Un When the transmission is in gear, and we apply the brakes, the torque converter will facilitate the rotation of the engine from the transmission. With a fluid coupling, the torque converter will help accomplish t A 2D animation will also give you a good idea of the automatic transmission system. Thank you!