Transmisi Otomatis, Bagaimana cara kerjanya?

Summary

This video explains the workings of automatic transmissions, focusing on the complex planetary gear mechanism used in high-performance vehicles. It details how the system operates without a direct connection between the input and output shafts, utilizing clutches to control power transmission. The video illustrates the processes for achieving different gear ratios, including the first, second, and overdrive gears, while highlighting the role of the torque converter in separating the engine's rotation from the transmission. Through clear explanations and illustrations, viewers gain insights into the efficiency and reliability of automatic transmission systems.

Takeaways

• 😀 Automatic transmissions are popular for high-performance vehicles due to their ease of use and reliability.
• 🔧 The core mechanism of an automatic transmission is based on a planetary gear set.
• 🔄 The planetary gear set consists of two inputs and one output, with output rotation derived from the planet carrier.
• ⚙️ Different input speeds affect the output speed, with the mechanism functioning as a cohesive unit.
• 🌀 Engaging the ring gear in reverse results in reverse gear operation.
• 🔗 There is no direct connection between the input and output shafts; an intermediary shaft is used.
• 🔄 Two clutches are employed to transmit power, connecting or locking various components.
• 📈 To achieve different gear ratios, additional planetary gear sets can be added.
• 📏 The control unit of the transmission decides when to engage each clutch.
• ⚡ A torque converter is necessary during transmission operation to separate engine rotation from transmission input.

Q & A

What is the primary focus of the video?

The video discusses the working principles of automatic transmissions, particularly those developed by Allison, using simple and logical explanations.

What is a planetary gear set, and how does it function in an automatic transmission?

A planetary gear set consists of two inputs and one output, with the output rotation taken from the planet carrier. The input shafts are connected to the sun gear and the ring gear.

How does changing the input speed affect the output speed in the transmission?

When different speeds are applied to the inputs, it results in variations in the output speed, allowing the mechanism to operate smoothly and efficiently.

What role do clutches play in the operation of an automatic transmission?

Clutches are used to lock and unlock different components of the transmission, enabling the transfer of power from the input to the output without direct connection.

What happens when the first clutch is engaged?

When the first clutch is engaged, the input shaft connects to the intermediate shaft, which allows the output shaft to rotate at a reduced speed compared to the input speed.

How is overdrive achieved in an automatic transmission?

Overdrive is achieved when the ring gear and planet carrier are directly connected to the input shaft, allowing for a high output rotation speed.

What distinguishes automatic transmissions from manual ones?

Automatic transmissions do not require direct driver intervention for gear changes and often include a torque converter, which separates the engine rotation from the transmission during operation.

What is the significance of the torque converter in an automatic transmission?

The torque converter allows for a smooth transfer of power between the engine and transmission, particularly during gear changes, by using fluid coupling.

Can you explain the relationship between the sun gear, ring gear, and planet carrier in a planetary gear set?

The sun gear serves as the central gear, while the ring gear encircles it. The planet carrier holds the planet gears that rotate around the sun gear and connect to the output, allowing for various gear ratios.

What happens during the reverse operation of the transmission?

During reverse operation, the system causes the ring gear to rotate in the opposite direction, resulting in reverse movement of the vehicle.