| 摘要 |
Disclosed is a pilot valve of a brake system for a vehicle simplifying an inner composition for an easy movement and manufacturing. According to an embodiment of the present invention, the pilot valve installed in the entrance side of a passage where a fluid flows from a master cylinder into a low pressure accumulator, controls the flow of the fluid. The pilot valve of a brake system for a vehicle includes: a valve seat installed in the entrance side of the passage and having a stepped section making the through-holes, where the inside thereof is penetrated, to be stepped; a cylindrical sleeve pressed and coupled inside the upper side of the valve seat, and having one or more passage in the upper side allowing the fluid to flow in while the sleeve is integrated with filter members filtering the fluid which flows through the passage; a plunger installed to be capable of lifting inside the sleeve, having a center hole which has a first opening and closing passage inside the plunger, and forming a second opening and closing passage with the stepped section in the lower outside; a ball positioned inside the plunger to come in contact with the center hole for opening and closing the first opening and closing passage; a first spring for elastically pressurizing the ball toward the center hole; a second spring which elastically pressurizes the plunger toward the upper side of the sleeve for opening the second opening and closing passage; and a shaft installed in a piston of the low pressure accumulator and coming in contact with the ball. |
