| 摘要 |
According to the present invention, a piston pump valve seat is prepared at a same shaft with a cap for a piston pump to seal the opened end of a modulator block, has an orifice, and comprises a fluid passage wherein oil flows on an outer surface opposite to the cap for the piston pump. Moreover, a pump unit for the electronic control brake system comprises a piston installed to reciprocate by an eccentric spindle of a motor in a bore formed in the modulator block having an inlet port and an outlet port, and includes a suction passage connected to the inlet port; an inlet valve installed at an outlet side of the suction passage and installed in the piston to open and close the suction passage; an outlet valve installed at an inlet side of the outlet passage connected to the outlet port to open and close the orifice; the cap for the piston pump which seals the opened end of the modulator block and supports the outlet valve; and the valve seat for the piston pump which is connected to the piston with the piston spring at a predetermined interval, divides the bore into a pressurizing chamber in which the piston is located and a discharging chamber connected to the outlet port, includes the orifice, and includes the fluid passage in the outer surface opposite to the cap for the piston pump. |
