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

2 Answers

CarlosLee

07/28/25 8:19pm

In automatic transmission vehicles, the clutch is integrated into the transmission system to enable automatic gear shifting. Here are the relevant details: 1. Automatic Transmission: Automatic vehicles typically use an Automatic Transmission (AT) to regulate speed. While driving, the AT's control system automatically selects the appropriate gear based on engine speed and load, replacing the driver's subjective judgment and manual gear shifting operations. 2. Clutch: During vehicle operation, the driver can press or release the clutch pedal as needed to temporarily disconnect or gradually engage the engine with the transmission, thereby interrupting or transmitting the engine's power input to the transmission.

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DiAubrey

08/12/25 1:07am

Having driven automatic transmission cars for over a decade, I believe the primary function of a clutch is to smoothly engage or disengage engine power, which is particularly noticeable during starting and gear shifting. Although automatic transmissions don't have a clutch pedal, they utilize a torque converter internally as a hidden assistant: when you start the car or accelerate, it automatically disengages the driveshaft to prevent engine stalling or sudden jerks; during gear shifts, it quietly reconnects to ensure seamless transitions. This design eliminates the hassle of manual operation, making it ideal for beginners or congested roads. A related issue is that torque converters may degrade over time, causing power lag – I recommend regular transmission fluid changes for maintenance to extend service life. Overall, the clutch silently ensures driving comfort, enhances vehicle controllability to reduce accident risks, and serves as a key factor in the convenience of modern automatic transmissions.

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