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What is the function of the clutch in an automatic transmission?

1 Answers

MacHazel

07/29/25 1:33pm

As the name suggests, the clutch is a component that utilizes "disengagement" and "engagement" to transmit an appropriate amount of power, serving as the medium that transfers engine power to the transmission. The clutch consists of friction plates, spring plates, a pressure plate, and a power output shaft. It is positioned between the engine and the transmission, transferring the torque stored on the engine's flywheel to the transmission. This ensures that the vehicle delivers the right amount of driving force and torque to the drive wheels under different driving conditions, falling under the category of the powertrain. An automatic transmission is a gear-shifting device that automatically changes gears based on the vehicle's speed and engine RPM, as opposed to a manual transmission. Currently, there are four common types of automatic transmissions in vehicles: hydraulic automatic transmission (AT), continuously variable transmission (CVT), automated manual transmission (AMT), and dual-clutch transmission (DCT). When using the transmission daily, the following points should be noted: Do not go for extended periods without changing the transmission fluid. Prolonged failure to change the transmission fluid can lead to damage to internal components such as bearings and the housing. Avoid coasting in neutral for long durations. While driving manual transmission vehicles, many experienced drivers may coast in neutral, but for automatic transmission vehicles, this can cause the transmission to overheat and produce a jolt when shifting back into Drive (D). Never shift into Drive (D) or Reverse (R) before the vehicle has come to a complete stop. Many drivers, in an attempt to showcase smooth operation, shift directly into the opposite gear before the vehicle has fully stopped. This can cause significant damage to the transmission gears and, over time, lead to gear grinding and other malfunctions. Avoid frequently climbing steep slopes in Drive (D). When facing steep inclines, automatic transmission vehicles may overheat due to high loads or shift up too early, resulting in insufficient climbing power. In such cases, it is advisable to use manual mode to limit the gear to a lower range or switch to sport mode to protect the transmission. Do not tow the vehicle over long distances. If an automatic transmission vehicle breaks down, it should be transported using a flatbed tow truck, with the vehicle shifted into Neutral (N) and moved onto the tow bed. Towing ropes or direct vehicle towing should not be used.

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