What is the reason for the clutch pedal feeling empty?

[StPenelope]

The reasons for the clutch pedal feeling empty are: 1. There is oil leakage in the car's clutch system; 2. The clutch master cylinder or slave cylinder has malfunctioned. The solutions for the clutch pedal feeling empty are: 1. Check the car's clutch system for oil leakage; 2. Inspect whether the clutch master cylinder or slave cylinder has malfunctioned. The functions of the clutch include: 1. Gradually increasing the driving force of the car to ensure a smooth start; 2. Temporarily separating the engine and transmission for gear shifting; 3. Preventing overload of the transmission system; 4. Reducing torsional vibration impact from the engine and extending the lifespan of transmission gears. The working principle of the clutch: 1. When the inner race is fixed, the outer race rotates clockwise and the wedge block does not lock, allowing the outer race to rotate freely; 2. When the outer race rotates counterclockwise, the wedge block locks, preventing the outer race from rotating.