| 摘要 |
PURPOSE: A piston pump with a check valve function is provided to improve productivity and reduce the number of components by removing a check valve. CONSTITUTION: A piston pump with a check valve function comprises a modulator block(20), a pump chamber, a piston(30), a pump filter, and a backflow prevention unit. The modulator block comprises an ABS side first inlet(22) and an ESC side second inlet(24). The pump chamber is equipped inside the modulator block into an oil storage space. The piston comprises a motor at one side and reciprocates in the pump chamber. The pump filter is equipped in the inlet of the piston for filtering the foreign substances of oil. The backflow prevention unit is formed on the circumference of the pump filter, induces the oil from the first inlet, and prevents the backflow of the oil inside the pump chamber towards the first inlet. |
