# US 10,480,673 B2 · Solenoid valve for brake system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,480,673 B2 - Document ID: US10480673B2 - Status: Granted - Kind: B2 - Application number: 15/923,605 - Filed: 2018-03-16 - Published: 2018-09-20 - Granted: 2019-11-19 - Earliest claimed: 2017-03-16 - Assignees: Mando Corporation - Applicants: Mando Corporation - Inventors: An-Soo Yoon - Web page: https://patentgrep.com/patent/US10480673B2 ## CPC - F16K 31/0665: {with valve member being at least partially ball-shaped (F16K31/0662 takes precedence)} - B01D 29/56: in series connection - B60T 8/363: {in hydraulic systems (B60T8/3655, B60T8/3675 and B60T8/369 take precedence)} - B60T 13/662: {characterised by specified functions of the control system components} - B60T 13/686: {in hydraulic systems or parts thereof} - B60T 17/004: {Draining and drying devices} - F16K 27/029: {Electromagnetically actuated valves} - F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)} - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - B60T: VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL (electrodynamic brake systems for vehicle, in general B60L; brakes per se, i.e. devices where braking effect occurs, including ultimate brake actuators, F16D); ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES ## Abstract The solenoid valve according to the embodiment of the present disclosure includes a filter member accommodated in a bore of a modulator block, a valve seat including an orifice, and a plunger configured to open and close the orifice, wherein the boss in which a connecting path is formed is inserted into the valve seat located at a center of the filter member, a plunger valve configured to be vertically moved due to a pressure of supplied oil and including a vertical hole formed to pass through a center of the plunger valve is disposed below the connecting path, and a plunger valve seat having a diameter greater than that of the connecting path is provided at a lower portion of the connecting path to selectively come into contact with an outer surface of the plunger valve when the plunger valve is moved upward. ## Claims ### Claim 1 A solenoid valve for a brake system comprising: a filter member accommodated in a bore of a modulator block including an inlet path and a discharge path; a magnet core coupled to the filter member and including a through hole longitudinally passing through the magnet core; a sleeve coupled to an outer surface of the magnet core; an armature installed in the sleeve; a valve seat fixed to the through hole and including an orifice; a plunger disposed at the through hole to open and close the orifice while vertically being moved by movement of the armature; and a returning spring configured to press the plunger against the armature, wherein a boss inserted into the valve seat through an opening of a lower end of the filter member and including a connecting path configured to cause the orifice to communicate with the discharge path is formed to pass through a center of the filter member, a plunger valve vertically, moved due to a pressure of supplied oil and including a vertical hole formed to pass through a center of the plunger valve is disposed below the connecting path, and a plunger valve seat having a diameter greater than that of a diameter of the connecting path is provided at a lower end of the connecting path to selectively come into contact with an outer surface of the plunger valve when the plunger valve vertically moves. ### Claim 2 (depends on 1) The solenoid valve of claim 1, wherein a width of the plunger valve seat gradually increases in a downward direction. ### Claim 3 (depends on 1) The solenoid valve of claim 1, wherein the plunger valve seat has a size to accommodate the plunger valve and a corn shape including a horizontal surface horizontally extending from a lower end of the connecting path and an inclined surface inclined downward from an edge of the horizontal surface. ### Claim 4 (depends on 3) The solenoid valve of claim 3, wherein the plunger valve includes a sealing portion configured to come into contact with the inclined surface when the plunger valve is moved upward due to the pressure of the supplied oil. ### Claim 5 (depends on 3) The solenoid valve of claim 3, wherein, when the plunger valve is moved downward and separated from the plunger valve seat, the oil is allowed to flow through the vertical hole and a gap between the plunger valve and the plunger valve seat. ### Claim 6 (depends on 3) The solenoid valve of claim 3, wherein, when the plunger valve is moved upward and comes into contact with the plunger valve seat, the oil is allowed to flow through only the vertical hole. ### Claim 7 (depends on 1) The solenoid valve of claim 1, wherein: the filter member covers an outer surface of a lower side of the magnet core; and the outer surface includes a circumference coupled to the bore. ### Claim 8 (depends on 7) The solenoid valve of claim 7, wherein: a first filter configured to filter oil introduced into a flow path formed between the filter member and a lower end of the magnet core through the inlet path is provided at the circumference of the filter member; and a second filter configured to filter oil discharged toward the discharge path is provided at the lower end of the filter member. ### Claim 9 (depends on 1) The solenoid valve of claim 1, wherein the vertical hole causes the connecting path to continuously communicate with the discharge path. ### Claim 10 (depends on 3) The solenoid valve of claim 3, wherein the plunger valve is formed with a sealing portion formed in a hemisphere shape and configured to come into contact with the inclined surface when the plunger valve is moved upward due to the pressure of the oil, and a cylinder located below the sealing portion, and has a cross section having an arch shape.