Automatic Transmission, How it works?

Summary

The script explores the intricate workings of the 6-Speed Automatic transmission from Allison, using a 2D animation to simplify the complex planetary gearset mechanism. It explains how different input speeds to the ring and sun gears result in varied output speeds, highlighting the brilliance of automatic transmissions. The video encourages viewers to pause and understand the mechanism behind each gear, showcasing the automatic transmission's efficiency and the reverse gear's unique operation. The script concludes by inviting support for their educational content on Patreon.

Takeaways

• 😀 The 6-Speed Automatic transmission from Allison can be better visualized and understood through 2D animation.
• 🔧 A planetary gearset, which is a key component, has two inputs and one output, and its operation is fundamental to understanding automatic transmissions.
• 🌟 The essence of a planetary gearset is to produce different output speeds by varying the speeds of the ring and sun gears.
• 📐 The 2D animation represents a cross-section of the 3D model, making complex mechanisms easier to comprehend.
• 🔄 In an automatic transmission, the input and output are connected through an intermediate shaft, not directly.
• 🤔 The script encourages viewers to pause and understand the mechanism at each gear to appreciate the brilliance of the design.
• 👉 Pressing the clutch connects the input to the sun gear, which is a crucial step in engaging the first gear.
• 🔄 The carrier of additional gear sets is connected to the ring gear of the previous set, creating a cascading effect on the output speed.
• 🔄 Applying different clutch combinations (C1, C2, C3, C4, C5) alters the stationary and rotating components, resulting in different gear ratios.
• 🔄 For direct drive, both the sun and ring gears rotate at the input speed, achieved by pressing C2 and C1 together.
• 🔄 High-speed output is achieved by applying C2 and C4, which makes the sun gear turn at nearly three times the input speed.
• 🔄 The reverse gear is obtained by applying C5 with C3, causing the planet gears to spin in the same direction as the input, but the sun gear to spin in the opposite direction.

Q & A

What is the purpose of using 3D animation to explain complex technologies?

3D animation helps in visualizing complex mechanisms in an understandable way by providing a dynamic and interactive representation of the technology.

Why is a 2D animation considered ideal for explaining the planetary gearset mechanism?

A 2D animation can represent a cross-section of a 3D model, simplifying the complex structure of a planetary gearset and making it easier to understand the mechanism's working.

What are the three main components of a planetary gearset?

A planetary gearset consists of a sun gear, a ring gear, and planet gears, with the planet gears orbiting around the sun gear within the ring gear.

How many inputs and outputs does a planetary gearset have?

A planetary gearset has two inputs and one output, which allows for the control of different speeds at the output by varying the speeds of the ring and sun gears.

How are the input and output connected in an automatic transmission?

In an automatic transmission, the input and output are connected through an intermediate shaft, which allows for the transmission of different input speeds to the output.

What is the significance of understanding the mechanism of a planetary gearset in relation to automatic transmissions?

Understanding the planetary gearset mechanism is fundamental to grasping how automatic transmissions work, as it forms the basis for the shifting of gears and speed variations.

What happens when you press the clutch in the context of the first gear?

Pressing the clutch connects the input to the sun gear, and when clutch C5 is pressed, the output ring gear becomes stationary, resulting in the first gear being engaged.

How is the carrier of the second gear set connected to the first set in the automatic transmission?

The carrier of the second gear set is connected to the ring gear of the first set, meaning the output of the second set is connected to the input of the first set.

What is the role of the rotating clutch module in achieving a direct drive in an automatic transmission?

The rotating clutch module is used to achieve a direct drive by ensuring that both the sun and the ring gear rotate at the input speed when clutches C2 and C1 are pressed together.

How does applying C2 and C4 result in a very high output speed?

Applying C2 and C4 causes the carrier of the second set to turn at the input speed while the ring gear is stationary, making the sun gear turn at almost three times the input speed, resulting in a very high output speed.

What is the mechanism for obtaining the reverse gear in an automatic transmission?

The reverse gear is obtained by applying C5 along with C3, which makes the carrier of the second set stationary, causing the planet gears to spin in the same direction as the input, and the corresponding sun gear to spin in the opposite direction, resulting in the output turning in the opposite direction.

How can viewers enhance their understanding of the automatic transmission mechanism?

Viewers can enhance their understanding by pausing the video at each gear shift and analyzing the mechanism, which will help them appreciate the brilliance of the automatic transmission mechanism.