摘要 |
PURPOSE: A master cylinder for a quick response in a clutch of a vehicle is provided to improve responsiveness of the master cylinder, and to reduce air breathing hours by returning oil quickly. CONSTITUTION: A master cylinder has a piston(20), and a push rod moves by receiving operational force of a clutch pedal. The piston compresses oil by moving with the push rod. An oil return path is formed rectilinearly and longitudinally in the piston to return pressed oil in restoring the clutch pedal, and a check valve(50) is formed to open and close the path. The check valve is restricted by a stopper not to shut off the path in returning oil, and the responsiveness of the master cylinder is improved by returning oil quickly.
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