Patent Publication Number: US-2017356395-A1

Title: Noise reduction type purge control solenoid valve

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims priority to Korean Patent Application No. 10-2016-0073177, filed on Jun. 13, 2016, the disclosure of which is incorporated herein by reference in its entirety. 
     BACKGROUND 
     Field of the Disclosure 
     The present disclosure relates to a solenoid valve, and more particularly, to a noise reduction type purge control solenoid valve (PCSV) for reducing noise generated from a PCSV of a vehicle. 
     Description of the Related Art 
     Generally, a purge control solenoid valve is a valve positioned between an intake manifold and a canister and controls fuel evaporation gas collected in the canister, and prevents the fuel evaporation gas from being leaked to the external environment generates significant operating noise during idling or low-speed driving of a vehicle. A fuel evaporation gas is generated as fuel evaporates in a fuel tank and an evaporator when an engine stops. The generated fuel evaporation gas is absorbed and stored in the canister thereby preventing the fuel evaporation gas from being released into the atmosphere. Further, the fuel evaporation gas absorbed in the canister is introduced into the intake manifold again according to a determination of an ECU collecting information of each sensor to thereby be burned. 
     However, significant noise is generated every time the purge control solenoid valve operates and the quite operation of the vehicle is disturbed. Accordingly, there is a high demand for an apparatus capable of reducing noise during the repetitive operation of the purge control solenoid valve. 
     The above information disclosed in this section is merely for enhancement of understanding of the background of the disclosure and therefore it may contain information that does not form the prior art that is already known in this country to a person of ordinary skill in the art. 
     SUMMARY 
     The present disclosure provides a noise reduction type purge control solenoid valve that reduces noise generated during operation of a purge control solenoid valve through a noise reduction member disposed in the purge control solenoid valve. 
     In accordance with one aspect of an exemplary embodiment of the present disclosure, a noise reduction type purge control solenoid valve may include a body having a connector configured to supply electricity from an external source; a cover coupled to the body, including a fluid inlet and a fluid outlet, and formed with a fluid discharge passage connected to the fluid outlet therein; a solenoid component disposed in the body; an armature disposed between the solenoid component and the fluid discharge passage and configured to move upward and downward by the solenoid component to open and close the fluid discharge passage; a noise reduction member mounted on the armature to reduce noise generated by contact between the fluid discharge passage and the armature; and a noise reduction wall protruding along a circumference of an upper surface of the noise reduction member. 
     The solenoid component may further include a solenoid port disposed in the body; a bobbin component disposed in the solenoid port; a solenoid core positioned at the center of the bobbin component; a coil wound around an exterior portion of the bobbin component; and a plate coupled to an upper portion of the bobbin component, disposed to adjacent to the armature, and magnetized when power is applied to the coil. The solenoid component may further include a spring inserted into a spring accommodating component formed at a lower portion of the armature and supported by the solenoid core to elastically support the armature. 
     The noise reduction member may be formed with a fastening protrusion. The armature may be formed with a fastening aperture into which the fastening protrusion is inserted to allow the noise reduction member to be mounted on the armature. A plurality of protrusions for dispersing noise may be formed on an interior surface of the noise reduction wall. 
     The noise reduction wall may further include a blocking wall formed at an upper portion thereof to protrude toward the center of the noise reduction member to obstruct noise emission. The noise reduction type purge control solenoid valve may further include a ring filter disposed in the cover and that reduces noise generated when a fluid is introduced through the fluid inlet. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other objects, features and other advantages of the present disclosure will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which: 
         FIG. 1  is an exemplary perspective view of a noise reduction type purge control solenoid valve according to an exemplary embodiment of the present disclosure; 
         FIG. 2  is an exemplary longitudinal cross-sectional view of the noise reduction type purge control solenoid valve according to an exemplary embodiment of the present disclosure; 
         FIG. 3  is an exemplary partially cut-away perspective view of the noise reduction type purge control solenoid valve according to an exemplary embodiment of the present disclosure; 
         FIG. 4  is an exemplary enlarged view of portion of the noise reduction type purge control solenoid valve according to an exemplary embodiment of the present disclosure; 
         FIG. 5  is an exemplary enlarged view of a portion of a noise reduction type purge control solenoid valve according to another exemplary embodiment of the present disclosure; and 
         FIG. 6  is an exemplary enlarged view of portion of a noise reduction type purge control solenoid valve according to another exemplary embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, an exemplary embodiment of the present disclosure will be described in detail with reference to the accompanying drawings, in which exemplary embodiments of the disclosure are shown. While the invention will be described in conjunction with exemplary embodiments, it will be understood that present description is not intended to limit the invention to those exemplary embodiments. On the contrary, the disclosure is intended to cover not only the exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments, which may be included within the spirit and scope of the disclosure as defined by the appended claims. 
     The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” and/or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items. For example, in order to make the description of the present invention clear, unrelated parts are not shown and, the thicknesses of layers and regions are exaggerated for clarity. Further, when it is stated that a layer is “on” another layer or substrate, the layer may be directly on another layer or substrate or a third layer may be disposed therebetween. 
     It is understood that the term “vehicle” or “vehicular” or other similar term as used herein is inclusive of motor vehicle in general such as passenger automobiles including sports utility vehicles (SUV), buses, trucks, various commercial vehicles, watercraft including a variety of boats, ships, aircraft, and the like and includes hybrid vehicles, electric vehicles, combustion, plug-in hybrid electric vehicles, hydrogen-powered vehicles and other alternative fuel vehicles (e.g. fuels derived from resources other than petroleum). 
       FIG. 1  is an exemplary perspective view of a noise reduction type purge control solenoid valve according to an exemplary embodiment of the present disclosure. Referring to  FIG. 1 , a noise reduction type purge control solenoid valve  100  may include a body  120  having a connector to receive electricity supplied from the exterior and a cover  110  mounted on the body  120 . The cover  110  may have a side surface formed with a fluid inlet  112  through which a fluid is introduced, and an upper surface formed with a fluid outlet  111  through which the fluid is discharged. 
     Referring to  FIGS. 2 to 4 , a fluid discharge passage  113  connected to the fluid outlet  111  may be formed in the cover  110 , and the fluid may be introduced through the fluid inlet  112  and passes through the fluid discharge passage  113  to be discharged through the fluid outlet  111 . Further, a ring filter  170  may be provided on an interior wall of the cover  110  at the fluid inlet  112  side in order to prevent noise generated when the fluid is introduced through the fluid inlet  112 . Accordingly, the noise generated when the fluid is introduced may be filtered through the ring filter  170 . An armature  140  opening and closing the fluid discharge passage  113  may be disposed below the fluid discharge passage  113 , and may be configured to move in an upward and downward direction by a solenoid component  160  positioned in the body  120 . When the armature  140  moves downward, the fluid discharge passage  113  is open and the fluid is discharged. 
     Further, a noise reduction member  130  for reducing noise may be disposed on the armature  140 , and may be in contact with a lower portion of the fluid discharge passage  113 . The noise reduction member  130  may be configured to move upward and downward together with the armature  140  by the solenoid component  160  positioned in the body  120 . For example, when the noise reduction member  130  moves downward, the fluid is discharged to the fluid discharge passage  113  through a space between the fluid discharge passage  113  and the noise reduction member  130 . At this time, noise may be generated when the fluid is discharged to the fluid discharge passage  113  and operating noise may be generated due to contact between the fluid discharge passage  113  and the noise reduction member  130 . A noise reduction wall  131  may be formed along a circumference of the noise reduction member  130 . Accordingly, the noise may be reduced by a collision with the noise reduction wall  131  to be dispersed. In other words, the noise generated when the armature  140  moves upward and downward may be radially spread, and may be obstructed and attenuated by the noise reduction wall  131  before the noise is transferred to the exterior. 
     The solenoid component  160  may be configured to enable a solenoid port  161  to be accommodated in the body, and a bobbin component  162  may be disposed in the solenoid port  161 . A solenoid core  163  may be positioned at the center of the bobbin component  162 , a coil  164  may be wound around an exterior surface of the bobbin component  162 , and the solenoid component  160  may be configured to include a plate  165  coupled to an upper portion of the bobbin component  162 , facing the armature  140 , and magnetized when power is applied to the coil  164 . Therefore, when power is applied to the coil  164 , a magnetic field may be formed with the solenoid core  163  as its center, and the plate  165  may be magnetized to allow the armature  140  to be displaced in a downward direction. 
     A spring accommodating portion  142  may be formed at a lower portion of the armature  140  and a spring  150  may be accommodated in the spring accommodating portion  142 . The spring  150  may be supported by the solenoid core  163 , and may elastically support the armature  140  when power is not applied to the coil  164 . On the contrary, when power is applied to the coil  164 , the armature  140  may be displaced in a downward direction to secure a space between the armature  140  and the fluid discharge passage  113 . A fastening protrusion  132  protruding downward may be formed at one side of the noise reduction member  130 , and a fastening aperture  141  may be formed in the armature  140  to correspond to the fastening protrusion  132 . Therefore, the fastening protrusion  132  of the noise reduction member  130  may be elastically inserted into the fastening aperture  141  to be mounted. 
       FIG. 5  is an exemplary enlarged view of a noise reduction member of a noise reduction type purge control solenoid valve according to an exemplary embodiment of the present disclosure. Referring to  FIG. 5 , a noise reduction member  230  may be formed with a noise reduction wall  231  protruding upward, and a plurality of protrusions  233  may be formed on an interior surface of the noise reduction wall  231 . Therefore, noise may be radially spread when a fluid discharge passage  213  and an armature  240  contact each other. At this time, the plurality of protrusions  233  formed on the interior surface of the noise reduction wall  231  may disperse the noise thereby generally reducing noise. Other configurations are identical to those described with reference to  FIGS. 1 to 4 , thus detailed description thereof will be omitted. 
       FIG. 6  is an exemplary enlarged view of a noise reduction member of a noise reduction type purge control solenoid valve according to an exemplary embodiment of the present disclosure. Referring to  FIG. 6 , a noise reduction member  330  may be formed with a noise reduction wall  331  protruding upward, and a blocking wall  333  that protrudes while being inclined toward the center of the noise reduction member  330  may be additionally formed at an upper portion of the noise reduction wall  330 . The blocking wall  333  may obstruct noise primarily reduced by the noise reduction wall  331 . The blocking wall  333  may be formed to be spaced apart from an exterior surface of a fluid discharge passage  313  at a predetermined interval, and may have a shape in which it is inclined toward the center of the noise reduction member  330 . Therefore, introduction of the fluid may be improved but noise emission to the exterior of the blocking wall  333  may be minimized Other configurations are identical to those described with reference to  FIGS. 1 to 4 , thus detailed description thereof will be omitted. 
     As described above, according to the present disclosure, the noise reduction type purge control solenoid valve may include the noise reduction member and the noise reduction wall therein. Accordingly, the noise may be reduced even at the time of a repetitive operation of the purge control solenoid valve and shock is absorbed, thereby improving quiet in a vehicle. 
     Hereinabove, although the exemplary embodiments of the present disclosure have been described with reference to the accompanying drawings, but those having ordinary skill in the art to which the present disclosure pertains may variously apply and modify the above-described contents without departing from the scope of the present disclosure.