CN110056658B - PCV valve - Google Patents
PCV valve Download PDFInfo
- Publication number
- CN110056658B CN110056658B CN201910043249.3A CN201910043249A CN110056658B CN 110056658 B CN110056658 B CN 110056658B CN 201910043249 A CN201910043249 A CN 201910043249A CN 110056658 B CN110056658 B CN 110056658B
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- China
- Prior art keywords
- gas flow
- valve seat
- flow path
- housing
- protrusion
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M13/00—Crankcase ventilating or breathing
- F01M13/0011—Breather valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/42—Valve seats
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
Abstract
The invention provides a PCV valve which can inhibit resin foreign matters from flowing into a gas flow path. A PCV valve in which the 1 st casing has a support portion that supports a valve seat toward a direction in which the 1 st and 2 nd casings are joined, the 2 nd casing having: a 1 st projecting portion projecting toward the valve seat supported by the support portion of the 1 st housing and abutting against the valve seat; and the 2 nd protrusion protruding toward the valve seat at a position closer to the gas flow path side than the 1 st protrusion, wherein a protruding length of the 1 st protrusion is longer than a protruding length of the 2 nd protrusion.
Description
Technical Field
The technology disclosed herein relates to PCV valves.
Background
Patent document 1 discloses a PCV valve. The PCV valve of patent document 1 includes: a 1 st case made of resin and having a gas flow path formed therein; and a 2 nd case made of resin, which is formed with a gas flow path communicating with the gas flow path of the 1 st case and is connected to the 1 st case. The 1 st case and the 2 nd case are joined by welding. Further, the PCV valve of patent document 1 includes: a metal valve seat having a gas flow hole for communicating the gas flow paths of the 1 st and 2 nd housings, and disposed between the 1 st and 2 nd housings; and a valve body disposed in the gas flow path of the 2 nd case and facing the gas flow hole of the valve seat. The 1 st housing has a support portion that supports the valve seat toward a direction in which the 1 st housing is connected to the 2 nd housing. The 2 nd housing has a protruding portion that protrudes toward the valve seat supported by the support portion of the 1 st housing and abuts against the valve seat.
Patent document 1: japanese laid-open patent publication No. 8-232634
Disclosure of Invention
Problems to be solved by the invention
In the PCV valve of patent document 1, when the resin 1 st casing and the resin 2 nd casing are joined by welding, it is considered that both are joined by ultrasonic vibration welding. Ultrasonic vibration welding is a technique of melting and bonding resin members by ultrasonic vibration. In this case, it is considered that the projection of the 2 nd case made of resin which is in contact with the valve seat is also melted by ultrasonic vibration welding at the same time when the 1 st case and the 2 nd case are connected. If the protrusion of the 2 nd casing made of resin is melted by ultrasonic vibration welding, foreign matter made of resin generated by the melting may flow into the gas flow paths of the 1 st casing and the 2 nd casing. Therefore, the present specification provides a technique capable of suppressing inflow of foreign matter made of resin into the gas flow path.
Means for solving the problems
The PCV valve disclosed in this specification includes: a 1 st case made of resin and having a gas flow path formed therein; a 2 nd casing made of resin, having a gas flow path communicating with the gas flow path of the 1 st casing, and coupled to the 1 st casing; a metal valve seat having a gas flow hole for communicating the gas flow path of the 1 st case with the gas flow path of the 2 nd case, and disposed between the 1 st case and the 2 nd case; and a valve body disposed in the gas flow passage of the 1 st housing or the gas flow passage of the 2 nd housing, and facing the gas flow hole of the valve seat. The 1 st housing has a support portion that supports the valve seat in a direction in which the 1 st housing and the 2 nd housing are coupled. The 2 nd housing has: a 1 st projection that projects toward the valve seat supported by the support portion of the 1 st housing and abuts against the valve seat; and the 2 nd protrusion protruding toward the valve seat at a position closer to the gas flow path side than the 1 st protrusion. The 1 st protruding part has a protruding length longer than that of the 2 nd protruding part.
According to this configuration, since the 1 st protruding portion of the 2 nd housing abuts against the valve seat supported by the supporting portion of the 1 st housing, the valve seat disposed between the 1 st housing and the 2 nd housing can be reliably supported. Further, since the 2 nd housing has the 2 nd projecting portion, even if foreign matter is generated due to the 1 st projecting portion of the 2 nd housing made of resin abutting against the valve seat, the inflow of the foreign matter into the gas flow passage can be suppressed. For example, when the 1 st case and the 2 nd case are coupled to each other, if the 1 st case and the 2 nd case are connected by ultrasonic vibration welding, the resin of the 1 st protruding portion of the 2 nd case abutting on the valve seat may be melted by the ultrasonic vibration welding. Thus, it is considered that there is a risk that foreign matter made of resin generated by melting of the 1 st protrusion flows into the gas flow passage. However, according to the above configuration, since the 2 nd housing has the 2 nd projecting portion, even if a resin foreign substance is generated, the inflow of the foreign substance into the gas flow passage is restricted by the 2 nd projecting portion. This can prevent foreign matter made of resin from flowing into the gas flow path.
The 2 nd protrusion may have a side surface on the gas flow path side and a side surface opposite to the gas flow path side. A side surface of the 2 nd protrusion on the gas flow path side may be inclined toward the valve seat toward a side opposite to the gas flow path.
With this configuration, the gas flow passage of the 2 nd housing can be widened toward the valve seat. Therefore, the gas can flow smoothly.
The 1 st protrusion may have a side surface on the gas flow path side and a side surface on the opposite side of the gas flow path. A side surface of the 1 st protrusion opposite to the gas flow path may be inclined toward the gas flow path side as facing the valve seat.
In some cases, the valve seat disposed between the 1 st and 2 nd housings is chamfered at a position opposite to the gas flow path. According to the above configuration, since the side surface of the 1 st protrusion opposite to the gas flow path is inclined toward the gas flow path side as it faces the valve seat, the tip end portion of the 1 st protrusion can be prevented from facing the chamfered corner portion of the valve seat. Therefore, the 1 st projecting portion of the 2 nd housing can be reliably brought into contact with the valve seat.
A side surface of the 1 st projection on the gas flow path side may be substantially orthogonal to a front surface of the valve seat.
According to this configuration, even if the resin of the 1 st protruding portion of the 2 nd housing abutting the valve seat is melted to generate the resin-made foreign matter, the generated foreign matter grows along the side surface of the 1 st protruding portion on the gas flow path side. Therefore, even if resin foreign matter is generated, the foreign matter can be prevented from flowing into the gas flow passage.
Drawings
Fig. 1 is a sectional view of a PCV valve according to an embodiment.
Fig. 2 is an enlarged view of a main portion II of fig. 1.
Fig. 3 is an enlarged view of a main portion III of fig. 2.
Fig. 4 is a graph showing the test results using the PCV valve according to the embodiment.
Description of the reference numerals
1. A PCV valve; 11. 1, a first shell; 12. a 2 nd housing; 14. a connecting portion; 16. a connecting portion; 21. a valve seat; 22. a valve core; 25. a gas flow aperture; 31. 1 st gas flow path; 32. a 2 nd gas flow path; 41. a support portion; 42. an abutting portion; 45. a fusion part; 46. a fusion part; 61. 1 st protruding part; 62. a 2 nd projection; 161. the 1 st side; 162. a 2 nd side; 171. the 1 st side; 172. a 2 nd side; 211. a front side; 212. a back side; 213. a side surface; 215. a corner portion; 611. a base; 612. a tip portion; 621. a base; 622. a tip portion.
Detailed Description
Overview of PCV valve
The PCV valve 1 according to the embodiment is described with reference to the drawings. As shown in fig. 1 and 2, a PCV valve 1 according to the embodiment includes: a 1 st housing 11, a 2 nd housing 12, a valve seat 21, and a valve spool 22. The PCV valve 1 according to the embodiment is a valve for adjusting the flow rate of blow-by gas. Blow-by gas is gas that flows out from a crankcase (not shown) of the engine. The PCV valve 1 is disposed between a crankcase and an intake pipe (not shown) of the engine, and adjusts a flow rate of blow-by gas flowing out of the crankcase and flowing into the intake pipe.
The 1 st case 11 and the 2 nd case 12 are made of resin. The 1 st case 11 and the 2 nd case 12 are arranged to face each other. The 1 st case 11 and the 2 nd case 12 are joined by ultrasonic vibration welding. Ultrasonic vibration welding is a technique of melting and bonding resin members by ultrasonic vibration. The ultrasonic vibration welding is well known, and thus detailed description thereof is omitted.
The 1 st housing 11 is formed with a 1 st gas flow path 31. The 1 st gas flow path 31 extends in the axial direction of the 1 st housing 11. The blow-by gas flowing out from the crankcase of the engine flows through the 1 st gas passage 31. The 1 st housing 11 has a coupling portion 14. The coupling portion 14 is provided at a position closer to the 2 nd case 12 side in the 1 st case 11. The connection portion 14 of the 1 st case 11 is connected to the 2 nd case 12 by ultrasonic vibration welding. The coupling portion 14 of the 1 st case 11 has a welded portion 45. The weld 45 is formed on the inner circumferential surface of the coupling portion 14. The welding portion 45 is welded to the outer peripheral surface of the 2 nd case 12 by ultrasonic vibration welding.
The coupling portion 14 of the 1 st housing 11 has a support portion 41. The support portion 41 is formed by a step formed on the inner peripheral surface of the coupling portion 14 of the 1 st housing 11. The support portion 41 is formed as a surface facing the 2 nd housing 12 side. The valve seat 21 is disposed in the support portion 41. The support portion 41 supports the valve seat 21 in a direction (Y direction) in which the 1 st housing 11 and the 2 nd housing 12 are connected. The support portion 41 supports the valve seat 21 in the axial direction of the 1 st housing 11 toward the 2 nd housing 12 side.
Next, the valve seat 21 and the valve body 22 will be described. The valve seat 21 and the valve body 22 are made of metal. The valve seat 21 is disposed between the 1 st casing 11 and the 2 nd casing 12, and is sandwiched between the 1 st casing 11 and the 2 nd casing 12. The valve seat 21 is formed in a ring shape. A gas flow hole 25 is formed in the center of the valve seat 21. The gas flow hole 25 communicates between a 1 st gas flow path 31 formed in the 1 st casing 11 and a 2 nd gas flow path 32 formed in the 2 nd casing 12, which will be described later.
The valve seat 21 has: a front 211, a back 212, and a side 213. The front 211 of the valve seat 21 faces the 2 nd housing 12. The back surface 212 of the valve seat 21 faces the 1 st housing 11. The corner 215 between the front 211 and the side 213 of the valve seat 21 is chamfered with rounded corners.
The valve body 22 is disposed in the 1 st gas flow path 31 of the 1 st housing 11. The valve element 22 is seated or unseated with respect to the valve seat 21. The valve body 22 faces the gas flow hole 25 of the valve seat 21. The valve body 22 opens and closes the gas flow hole 25 of the valve seat 21. In a state where the valve body 22 is seated on the valve seat 21, the valve body 22 is inserted into the gas flow hole 25 of the valve seat 21, and the gas flow hole 25 is closed. In a state where the valve body 22 is unseated from the valve seat 21, the valve body 22 is separated from the gas flow hole 25 of the valve seat 21, and the gas flow hole 25 is opened. The flow rate of the blow-by gas passing through the gas passage hole 25 is adjusted by opening and closing the gas passage hole 25 by the valve body 22.
Next, the 2 nd case 12 will be described. The 2 nd casing 12 is formed with a 2 nd gas flow path 32. The 2 nd gas flow path 32 extends in the axial direction of the 2 nd casing 12. The 2 nd gas flow path 32 communicates with the 1 st gas flow path 31 of the 1 st casing 11. Blowby gas flowing out from the crankcase of the engine flows in the 2 nd gas flow passage 32. The 2 nd housing 12 has a coupling portion 16. The coupling portion 16 is provided at a position closer to the 1 st case 11 side in the 2 nd case 12. The coupling portion 16 of the 2 nd case 12 is coupled to the coupling portion 14 of the 1 st case 11 by ultrasonic vibration welding. The coupling portion 16 of the 2 nd housing 12 has a welded portion 46. The fusion-bonded portion 46 is formed on the outer peripheral surface of the coupling portion 16. The welding portion 46 is welded to the inner peripheral surface of the coupling portion 14 of the 1 st case 11 by ultrasonic vibration welding.
Details of the contact part, the 1 st projecting part and the 2 nd projecting part
The 2 nd housing 12 has an abutment 42. The contact portion 42 protrudes toward the valve seat 21 supported by the support portion 41 of the 1 st housing 11. The valve seat 21 is disposed between the contact portion 42 of the 2 nd housing 12 and the support portion 41 of the 1 st housing 11. As shown in fig. 3, a 1 st projecting portion 61 and a 2 nd projecting portion 62 are provided at a distal end portion of the contact portion 42 on the 1 st housing 11 side. The 1 st projection 61 and the 2 nd projection 62 face each other in the radial direction of the valve seat 21. The 2 nd protrusion 62 is formed on the 2 nd gas flow path 32 side of the 1 st protrusion 61. The 1 st projection 61 is formed on the opposite side of the 2 nd projection 62 from the 2 nd gas flow path 32. The 1 st projection 61 and the 2 nd projection 62 project toward the valve seat 21. The 1 st projection 61 and the 2 nd projection 62 extend in the axial direction of the 2 nd housing 12.
The projection length L1 of the 1 st projection 61 (the length from the base 611 to the tip 612 of the 1 st projection 61) is longer than the projection length L2 of the 2 nd projection 62 (the length from the base 621 to the tip 622 of the 2 nd projection 62). The distal end portion 612 of the 1 st projection 61 abuts the front surface 211 of the valve seat 21. The tip end 622 of the 2 nd protrusion 62 is spaced apart from the front 211 of the valve seat 21.
The 1 st protrusion 61 has a 1 st side surface 161 on the 2 nd gas flow path 32 side and a 2 nd side surface 162 on the opposite side of the 2 nd gas flow path 32. The 1 st side surface 161 and the 2 nd side surface 162 of the 1 st protruding portion 61 extend from the abutment portion 42 toward the valve seat 21. The 1 st side 161 is substantially orthogonal to the front 211 of the valve seat 21. The angle θ 1 formed by the 1 st side 161 and the front 211 of the valve seat 21 is preferably 85 ° to 95 °. The 2 nd side 162 is inclined with respect to the front 211 of the valve seat 21. The 2 nd side surface 162 is inclined toward the 2 nd gas flow path 32 side as it faces the valve seat 21. The angle θ 2 formed by the 2 nd side surface 162 and the front surface 211 of the valve seat 21 is preferably 55 ° to 65 °.
The 2 nd protrusion 62 has a 1 st side surface 171 on the 2 nd gas flow path 32 side and a 2 nd side surface 172 on the opposite side of the 2 nd gas flow path 32. The 1 st side surface 171 and the 2 nd side surface 172 of the 2 nd projecting portion 62 extend from the abutment portion 42 toward the valve seat 21. The 1 st side 171 is inclined with respect to the front 211 of the valve seat 21. The 1 st side surface 171 is inclined toward the opposite side of the 2 nd gas flow path 32 as it faces the valve seat 21. The angle θ 3 formed by the 1 st side surface 171 and the front surface 211 of the valve seat 21 is preferably 40 ° to 50 °. The 2 nd side 172 is substantially orthogonal to the front face 211 of the valve seat 21.
The PCV valve 1 according to the embodiment is described above. As is clear from the above description, the PCV valve 1 includes: a 1 st housing 11 made of resin and having a 1 st gas flow path 31 formed therein; and a resin 2 nd casing 12 having a 2 nd gas flow path 32 communicating with the 1 st gas flow path 31 of the 1 st casing 11 and connected to the 1 st casing 11. Further, the PCV valve 1 includes: a metal valve seat 21 which is disposed between the 1 st casing 11 and the 2 nd casing 12, and in which a gas flow hole 25 is formed to communicate between a gas flow path 31 of the 1 st casing 11 and a gas flow path 32 of the 2 nd casing 12; and a valve body 22 disposed in the 1 st gas flow path 31 of the 1 st housing 11 and facing the gas flow hole 25 of the valve seat 21. The 1 st housing 11 has a support portion 41 that supports the valve seat 21 in a direction in which the 1 st housing 11 and the 2 nd housing 12 are coupled. The 2 nd housing 12 has: a 1 st protruding portion 61 protruding toward the valve seat 21 supported by the support portion 41 of the 1 st housing 11 and abutting against the valve seat 21; and a 2 nd protrusion 62 protruding toward the valve seat 21 at a position closer to the 2 nd gas flow path 32 side than the 1 st protrusion 61. The projection length L1 of the 1 st projection 61 is longer than the projection length L2 of the 2 nd projection 62.
According to this configuration, since the support portion 41 of the 1 st housing 11 supports the valve seat 21 and the 1 st projection 61 of the 2 nd housing 12 abuts against the valve seat 21, the valve seat 21 disposed between the 1 st housing 11 and the 2 nd housing 12 can be reliably supported. The valve seat 21 can be firmly sandwiched by the 1 st case 11 and the 2 nd case 12. In the structure in which the 1 st protruding portion 61 of the 2 nd housing 12 abuts against the valve seat 21, the resin of the 1 st protruding portion 61 abutting against the valve seat 21 may melt. For example, when the 1 st case 11 and the 2 nd case 12 are coupled to each other, if the 1 st case 11 and the 2 nd case 12 are coupled to each other by ultrasonic vibration welding, the resin of the 1 st protruding portion 61 may be melted by the ultrasonic vibration welding. Thus, it is considered that foreign matter made of resin generated by melting of the 1 st protrusion 61 may flow into the gas flow passage (the 1 st gas flow passage 31 and/or the 2 nd gas flow passage 32). However, according to the above configuration, since the 2 nd housing 12 includes not only the 1 st protrusion 61 but also the 2 nd protrusion 62, even if foreign matter is generated by the 1 st protrusion 61 of the resin 2 nd housing 12 abutting on the valve seat 21, the inflow of the foreign matter into the gas flow paths 31 and 32 can be restricted by the 2 nd protrusion 62. Even if a foreign object made of resin is generated due to the support of the valve seat 21 by the 1 st projection 61, the movement of the foreign object is restricted by the 2 nd projection 62. Therefore, inflow of resin foreign matter into the gas flow paths 31 and 32 can be suppressed.
In the PCV valve 1 described above, the 2 nd protrusion 62 of the 2 nd housing 12 has the 1 st side surface 171 on the 2 nd gas flow path 32 side and the 2 nd side surface 172 on the opposite side from the 2 nd gas flow path 32. The 1 st side surface 171 of the 2 nd protrusion 62 is inclined toward the opposite side of the 2 nd gas flow path 32 as facing the valve seat 21. Therefore, the 2 nd gas flow path 32 can be widened toward the valve seat 21, and the blow-by gas can be smoothly flowed.
In the PCV valve 1 described above, the 1 st projection 61 of the 2 nd housing 12 has the 1 st side surface 161 on the 2 nd gas flow path 32 side and the 2 nd side surface 162 on the opposite side from the 2 nd gas flow path 32. The 2 nd side surface 162 of the 1 st projection 61 is inclined toward the 2 nd gas flow path 32 side as it faces the valve seat 21. Thus, the distal end portion 612 of the 1 st protrusion 61 can avoid facing the chamfered corner 215 of the valve seat 21. Therefore, the distal end portion 612 of the 1 st projection 61 reliably abuts against the front surface 211 of the valve seat 21.
Further, in the above-described PCV valve 1, the 1 st side surface 161 on the 2 nd gas flow path 32 side of the 1 st projection 61 of the 2 nd housing 12 is substantially orthogonal to the front surface 211 of the valve seat 21. According to this configuration, even if the resin of the 1 st protruding portion 61 of the 2 nd housing 12 abutting the valve seat 21 melts and a foreign substance made of the resin is generated, the foreign substance grows along the 1 st side surface 161 of the 1 st protruding portion 61. Therefore, even if resin foreign matter is generated, the foreign matter can be prevented from flowing into the 2 nd gas flow path 32.
Although the embodiment has been described above, the specific mode is not limited to the embodiment. In the following description, the same reference numerals are attached to the same components as those described above, and the description thereof is omitted.
Other embodiments
In the above embodiment, the 1 st side surface 171 of the 2 nd protrusion 62 of the 2 nd casing 12 is inclined toward the opposite side of the 2 nd gas flow path 32 as it faces the valve seat 21, but in another embodiment, the 1 st side surface 171 of the 2 nd protrusion 62 may be substantially perpendicular to the front surface 211 of the valve seat 21.
In the above embodiment, the 2 nd side surface 162 of the 1 st protrusion 61 of the 2 nd housing 12 is inclined toward the 2 nd gas flow path 32 as it goes toward the valve seat 21, but in another embodiment, the 2 nd side surface 162 of the 1 st protrusion 61 may be substantially perpendicular to the front surface 211 of the valve seat 21.
Although the 1 st side surface 161 of the 1 st protrusion 61 of the 2 nd housing 12 is substantially perpendicular to the front surface 211 of the valve seat 21 in the above-described embodiment, the 1 st side surface 161 of the 1 st protrusion 61 may be inclined with respect to the front surface 211 of the valve seat 21 in another embodiment.
Although the distal end 622 of the 2 nd protrusion 62 of the 2 nd housing 12 is separated from the front 211 of the valve seat 21 in the above embodiment, the distal end 622 of the 2 nd protrusion 62 may abut against the front 211 of the valve seat 21 in another embodiment.
Although the valve body 22 is disposed in the 1 st gas flow path 31 of the 1 st housing 11 in the above-described embodiment, the valve body 22 may be disposed in the 2 nd gas flow path 32 of the 2 nd housing 12 in another embodiment.
Test examples
The test was performed using the above-described PCV valve 1. The PCV valve 1 used in the test has a structure in which the 1 st side surface 161 of the 1 st projection 61 on the 2 nd gas flow path 32 side is substantially orthogonal to the front surface 211 of the valve seat 21. According to this configuration, as shown in fig. 4, even if the resin of the 1 st protruding portion 61 abutting on the valve seat 21 melts and a foreign substance X made of the resin is generated, it can be confirmed that the generated foreign substance X grows along the 1 st side surface 161 of the 1 st protruding portion 61. Therefore, it can be confirmed that even if the resin foreign matter X is generated, the foreign matter X is suppressed from flowing into the 2 nd gas flow path 32.
Although specific examples of the present invention have been described in detail above, these are merely examples and do not limit the claims. The technique described in the claims includes various modifications and changes of the specific examples illustrated above. The technical elements described in the present specification or drawings exhibit technical usefulness by themselves or in various combinations, and are not limited to the combinations recited in the claims at the time of filing. Further, the techniques illustrated in the present specification or the drawings can achieve a plurality of objects at the same time, and achieving one of the objects has technical usefulness.
Claims (4)
1. A PCV valve, wherein the PCV valve,
the PCV valve comprises:
a 1 st case made of resin and having a gas flow path formed therein;
a 2 nd casing made of resin, having a gas flow path communicating with the gas flow path of the 1 st casing, and coupled to the 1 st casing;
a metal valve seat having a gas flow hole for communicating the gas flow path of the 1 st case with the gas flow path of the 2 nd case, and disposed between the 1 st case and the 2 nd case; and
a valve body disposed in the gas flow passage of the 1 st case or the gas flow passage of the 2 nd case and facing the gas flow hole of the valve seat,
the 1 st housing has:
a support portion that supports the valve seat toward a direction in which the 1 st casing and the 2 nd casing are joined, the PCV valve being characterized in that,
the 2 nd housing has:
a 1 st projection that projects toward the valve seat supported by the support portion of the 1 st housing and abuts against the valve seat; and
a 2 nd protrusion protruding toward the valve seat at a position closer to the gas flow path side than the 1 st protrusion,
the 1 st protruding part has a protruding length longer than that of the 2 nd protruding part.
2. The PCV valve according to claim 1,
the 2 nd protrusion has a side surface on the gas flow path side and a side surface on the opposite side of the gas flow path,
the side surface of the 2 nd protrusion on the gas flow path side is inclined toward the valve seat toward the side opposite to the gas flow path.
3. The PCV valve according to claim 1 or 2,
the 1 st protrusion has a side surface on the gas flow path side and a side surface on the opposite side of the gas flow path,
a side surface of the 1 st protrusion opposite to the gas flow path is inclined toward the gas flow path side as facing the valve seat.
4. The PCV valve according to claim 3,
the side surface of the 1 st projection on the gas flow path side is substantially orthogonal to the front surface of the valve seat.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018007430A JP6961501B2 (en) | 2018-01-19 | 2018-01-19 | PCV valve |
| JP2018-007430 | 2018-01-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110056658A CN110056658A (en) | 2019-07-26 |
| CN110056658B true CN110056658B (en) | 2020-09-15 |
Family
ID=67316389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910043249.3A Active CN110056658B (en) | 2018-01-19 | 2019-01-17 | PCV valve |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6961501B2 (en) |
| CN (1) | CN110056658B (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0556424U (en) * | 1991-11-13 | 1993-07-27 | 大協株式会社 | Plastic edge joint structure |
| US5540808A (en) * | 1993-02-24 | 1996-07-30 | Deka Products Limited Partnership | Energy director for ultrasonic welding and joint produced thereby |
| JPH08232634A (en) * | 1995-02-27 | 1996-09-10 | Aisan Ind Co Ltd | Blow-by gas reducing flow control valve for internal combustion engine |
| CN2406128Y (en) * | 1999-11-18 | 2000-11-15 | 南京大地水刀有限公司 | High-low-pressure non-return valve group |
| JP2004351839A (en) * | 2003-05-30 | 2004-12-16 | Brother Ind Ltd | Joint structure and method for manufacturing joint structure |
| JP4654747B2 (en) * | 2005-04-14 | 2011-03-23 | トヨタ自動車株式会社 | On-off valve device for fluid |
| CN102650337B (en) * | 2011-02-23 | 2015-02-18 | 株式会社鹭宫制作所 | Valve structure body and check valve provided with the same |
| JP5680517B2 (en) * | 2011-10-31 | 2015-03-04 | 愛三工業株式会社 | Flow control valve |
| JP6446199B2 (en) * | 2014-08-19 | 2018-12-26 | 株式会社パイオラックス | Float valve device |
-
2018
- 2018-01-19 JP JP2018007430A patent/JP6961501B2/en active Active
-
2019
- 2019-01-17 CN CN201910043249.3A patent/CN110056658B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2019124213A (en) | 2019-07-25 |
| CN110056658A (en) | 2019-07-26 |
| JP6961501B2 (en) | 2021-11-05 |
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