CN115638278A - Pressure regulating valve and crankcase ventilation system with same - Google Patents
Pressure regulating valve and crankcase ventilation system with same Download PDFInfo
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- CN115638278A CN115638278A CN202211251720.6A CN202211251720A CN115638278A CN 115638278 A CN115638278 A CN 115638278A CN 202211251720 A CN202211251720 A CN 202211251720A CN 115638278 A CN115638278 A CN 115638278A
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Abstract
The application discloses pressure regulating valve and crankcase ventilation system who has it belongs to the auto-parts field. A pressure-regulating valve, comprising: a valve seat, a valve cover and an adjusting component; the valve seat is connected with the valve cover, and a valve cavity is formed between the valve seat and the valve cover; the adjusting component is arranged in the valve cavity, and one side of the adjusting component is abutted against the inner wall of the valve cover; the valve seat is provided with a valve core positioned in the valve cavity, the valve core comprises a valve core body and a drainage part arranged at the top end of the valve core body, the valve core body is provided with a valve hole, and fluid passes through the valve hole; the regulating member is displaced between an end position in a closing direction of the valve hole and an open position according to a pressure difference between the upstream side and the downstream side, and when the regulating member is at the end position in the closing direction of the valve hole, the fluid can flow through the drain portion to regulate the discharge of the fluid. The problem that the current crankcase pressure adjustment structure control range is difficult to satisfy demand, the cost is higher can be solved in this application, simple structure, realizes easily that the cost is lower.
Description
Technical Field
The application belongs to the technical field of auto-parts, relates to the engine field, concretely relates to pressure regulating valve and have its crankcase ventilation system.
Background
In an automobile engine, part of gas may flow into an automobile crankcase during operation, for example, because a small part of incompletely combusted gas or exhaust gas inevitably flows into the automobile crankcase from between a cylinder block and a piston ring, so that the pressure inside the crankcase is continuously increased, and a ventilation system needs to be connected in order to control the pressure inside the crankcase. The functions of the engine crankcase ventilation system include that the engine oil can be prevented from deteriorating; the leakage of a crankshaft oil seal and a crankcase gasket can be prevented; it is possible to prevent various oil vapors from contaminating the atmosphere, etc.
In the related art, a pressure regulating valve is usually disposed in a crankcase ventilation system, and most of the pressure regulating valves are diaphragm type pressure regulating valves, and the working principle of the pressure regulating valves is as follows: the flow rate of the gas is adjusted by the combination of atmospheric pressure, spring force and negative pressure source force, and if the crankcase pressure changes before the separated gas is sucked into the manifold or pressed, the opening degree of the pressure adjusting valve is reduced or increased under the combined action of the crankcase pressure and the atmospheric pressure, so that the crankcase pressure is adjusted. However, the existing engines in the market have stricter requirements on the crankcase pressure, the condition range of the crankcase pressure is smaller, and if the regulation range of the crankcase pressure is small, the regulation is realized with higher cost.
Disclosure of Invention
The present application is directed to solving, at least in part, one of the above-mentioned problems in the related art.
Therefore, the purpose of the application is to provide a pressure regulating valve and a crankcase ventilation system with the same, the pressure regulating valve is simple in structure and relatively low in cost, and the problems that the requirement cannot be met and the cost is high in the regulating range of the existing crankcase pressure regulating structure can be solved.
In order to solve the technical problem, the present application is implemented as follows:
the embodiment of the application provides a pressure regulating valve, it includes: a valve seat, a valve cover and an adjusting component;
the valve seat is connected with the valve cover, and a valve cavity is formed between the valve seat and the valve cover;
the adjusting component is arranged in the valve cavity, and one side of the adjusting component is abutted against the inner wall of the valve cover;
the valve seat is provided with a valve core positioned in the valve cavity, the valve core comprises a valve core body and a drainage part arranged at the top end of the valve core body, the valve core body is provided with a valve hole, and fluid passes through the valve hole;
the regulating member is displaced between an end position in a closing direction of the valve hole and an open position according to a pressure difference between an upstream side and a downstream side, and fluid may flow through the flow guide portion when the regulating member is at the end position in the closing direction of the valve hole.
In some embodiments, the drainage portion includes a plurality of ribs spaced apart from each other at the top end of the valve body.
In some embodiments, the valve core body is a hollow cylindrical structure, the plurality of ribs are circumferentially arranged along the top end of the valve core body at intervals, and a channel for fluid to pass through is formed between at least two adjacent ribs.
In some embodiments, the rib is integrally formed with the cartridge body;
or the bottom of the convex rib is fixedly connected with the top end of the valve core body.
In some embodiments, the top end of the valve core body is arranged obliquely, and at least part of the top end of the valve core body is provided with a groove to form the drainage part.
In some of these embodiments, the adjustment member comprises a valve membrane.
In some embodiments, the pressure regulating valve further comprises an elastic member disposed within the valve cavity.
In some embodiments, a protruding portion is disposed in a middle of the other side of the adjusting member, one end of the elastic member is sleeved on the protruding portion, and the other end of the elastic member abuts against an inner wall of the valve seat.
In some of these embodiments, the valve cover is provided with an air inlet that communicates with the valve chamber.
The embodiment of the application also provides a crankcase ventilation system, which comprises a crankcase and the pressure regulating valve, wherein the air inlet of the pressure regulating valve is communicated with the crankcase.
Compared with the prior art, the invention has the beneficial effects that:
in the embodiment of the application, the provided pressure regulating valve can be applied to an engine assembly of an automobile and can be used for regulating the pressure of a crankcase in the engine assembly, and the pressure regulating valve is provided with the drainage part at the top end of the valve core body, so that when the regulating member is located at the terminal position in the closing direction of the valve hole, additional fluid can still pass through the drainage part, the drainage of the fluid can be regulated, and the requirement on the pressure of the crankcase with a small regulating range can be met at low cost. The scheme has the advantages of simple structure, higher integration level and smaller occupied space, reduces the development and management cost of the pressure regulating valve, ensures that the pressure of the crankcase is more stable and reasonable when the engine operates, can improve the pressure regulating precision of the crankcase, and further can improve the reliability of a vehicle.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic structural diagram of a pressure regulating valve disclosed in an embodiment of the present application;
FIG. 2 is a schematic structural diagram of a drainage portion of the pressure regulating valve disclosed in the embodiment of the present application;
fig. 3 is a schematic structural view of another drain portion of the pressure regulating valve disclosed in the embodiment of the present application.
Description of reference numerals:
100-valve seat; 110-a valve core; 120-a cartridge body; 121-valve hole; 130-a drainage part; 131-convex ribs; 132-a groove;
200-valve cover;
300-an adjustment member; 310-a valve membrane;
400-an elastic member.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
The embodiments of the present application are described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.
Referring to fig. 1 to 3, the present disclosure provides a pressure regulating valve, which can be applied to an engine assembly of an automobile, especially a crankcase ventilation system of the engine assembly, and can be used for regulating the pressure of a crankcase.
Specifically, in some embodiments, a pressure regulating valve for regulating crankcase pressure is provided, the pressure regulating valve comprising: a valve seat 100, a valve cover 200, and an adjustment member 300.
The valve seat 100 and the valve cover 200 can be arranged oppositely, the valve seat 100 is connected with the valve cover 200, and a valve cavity is formed between the valve seat 100 and the valve cover 200;
the adjusting member 300 is arranged in the valve cavity, and one side of the adjusting member 300 is abutted against the inner wall of the valve cover 200;
the valve seat 100 is internally provided with a valve core 110, the valve core 110 is positioned in the valve cavity, the valve core 110 comprises a valve core body 120 and a drainage part 130 arranged at the top end of the valve core body 120, the valve core body 120 is provided with a valve hole 121, and fluid passes through the valve hole 121; at least a portion of the other side of the regulation member 300 may be used to contact the top end of the spool body 120 or the drain 130;
the regulating member 300 is displaceable between an end position in the closing direction of the valve hole 121 and an open position according to a pressure difference between the upstream side and the downstream side (between the upper and lower sides), and when the regulating member 300 is at the end position in the closing direction of the valve hole 121, the fluid can flow through the drain portion 130, whereby the discharge of the fluid can be regulated.
It should be noted that the pressure regulating valve provided in this embodiment may be integrated in an oil separator (oil mist separator) in a crankcase ventilation system of a vehicle engine assembly, and the pressure regulating valve may be connected to the crankcase through the oil separator to regulate the pressure of the crankcase during the operation of the engine.
Normally, the adjustment member 300 is axially movable, and at least a portion of the other side of the adjustment member 300 opens or closes the valve hole 121, and when the adjustment member 300 is located at an end position in the closing direction of the valve hole 121, the adjustment member 300 closes the valve hole 121, and at this time, fluid cannot flow out through the valve hole 121. In the embodiment of the present invention, the valve core 110 includes a valve core body 120 and a drainage portion 130 disposed at the top end of the valve core body 120, when the adjusting member 300 opens the valve hole 121, the fluid can pass through the valve hole 121, when the adjusting member 300 is located at the terminal position of the closing direction of the valve hole 121, for example, when the other side of the adjusting member 300 contacts with the top end of the valve core body 120 or the upper surface of the drainage portion 130, the fluid can pass through the drainage portion 130 and then can be discharged through the valve hole 121, that is, even if the adjusting member 300 is located at the terminal position of the closing direction of the valve hole 121, a small portion of the air flow can still pass through.
The pressure regulating valve of the embodiment has a simple structure, is easy to implement, has low cost, and through the arrangement of the drainage part 130, when the regulating member 300 is located at the end position of the valve hole 121 in the closing direction, additional fluid can still pass through the drainage part 130, so that the extraction of the fluid can be regulated, and the requirement of the crankcase pressure with a small regulating range can be met under the condition of low cost.
It should be noted that, it is relative speaking that the valve hole 121 is opened or closed, and the end position in the closing direction of the valve hole 121 may refer to that the bottom end of the adjusting member 300 contacts or abuts the top end of the valve core body 120 or the upper surface of the drainage portion 130; the punching position of the valve hole 121 may be that the regulation member 300 is separated from the top end of the spool body 120 or the upper surface of the drain 130, i.e., the regulation member 300 is not in contact with the spool.
In some embodiments, the pressure regulating valve further comprises a resilient member 400, the resilient member 400 being disposed within the valve cavity. The pressure regulating valve may include a valve cover 200 and a valve seat 100 which are oppositely arranged, a valve cavity is formed between the valve cover 200 and the valve seat 100, a regulating member 300 and an elastic member 400 are arranged in the valve cavity, the regulating member 300 may be operated or displaced in the valve cavity along with the flow direction of gas (according to the pressure difference between the two sides) when the engine is operated, the elastic member 400 may be arranged between the regulating member 300 and the inner bottom wall of the valve seat 100, and the elastic member 400 may be used to provide an elastic force to stabilize the regulating member 300 at any target position.
Alternatively, the elastic member 400 may be a spring. Of course, in other embodiments, other types of elastic members 400 capable of providing elastic force may also be used, and the embodiment is not limited to the specific type of the elastic member 400.
Thus, based on the above arrangement, when the engine of the vehicle is operated, since the pressure applied to the pressure regulating valve is different due to different operation loads, the elastic force of the spring acts to make the gap between the regulating member 300 and the inner wall of the valve seat 100 or the valve hole 121 different, thereby implementing the function of regulating the crankcase pressure. Further, the pressure regulating valve provided by the embodiment of the invention can meet the requirement of the crankcase pressure with a small regulating range by arranging the drainage part 130, so that the pressure of the engine crankcase can be kept in a reasonable interval, and the pressure regulating precision is improved.
In particular, the drainage part 130 may have various embodiments. For example, as shown in fig. 2, in some embodiments, the flow guide portion 130 includes a plurality of ribs 131 that are disposed at intervals at the top end of the valve body 120. Optionally, the plurality of ribs 131 may be relatively small ribs 131 that are uniform in shape and uniformly distributed at the top end of the valve core body 120; therefore, the uniformity is good, and the processing and the manufacturing are convenient. In other embodiments, the plurality of ribs 131 may have slightly different shapes, or the intervals between adjacent ribs 131 may be slightly different; that is, the plurality of ribs 131 may be relatively small ribs 131 that are not uniform in shape and are unevenly distributed on the top end of the valve body 120.
Therefore, based on the above arrangement, in the present embodiment, the plurality of ribs 131 are additionally arranged at the top end of the valve core body 120, so that the gap between the bottom of the adjusting member 300 and the inner wall of the valve seat or the valve core can be used for controlling the flow rate of the adjusting member 300 (valve membrane) under the condition of closing, and the gap between the bottom of the adjusting member 300 and the inner wall of the valve seat or the valve core can be used for increasing the flow rate under the condition of closing the adjusting member 300, so that extra air flow still passes through under the condition of closing the adjusting member 300, and further, the adjusting member 300 with lower cost, such as the valve membrane 310, can meet the requirement of small adjustment range of crankcase pressure, that is, the requirement of small adjustment range of crankcase pressure can be met at lower cost.
Optionally, the valve core body 120 is a hollow cylindrical structure, the plurality of ribs 131 are circumferentially arranged along the top end of the valve core body 120 at intervals, and a channel for fluid to pass through is formed between at least two adjacent ribs 131. For example, at least one row of a plurality of ribs 131 arranged in a ring shape may be provided at the top end of the valve body 120. Thus, the fluid can enter the valve hole 121 through the gaps between the ribs 131 and then flow out of the valve hole 121.
According to the excess air quantity demand, the crankcase pressure value and the engine operation condition, the height value of the convex ribs 131 is limited to be 0-1mm, the distance between the convex ribs is limited to be 0-1.5mm, and the channel cross section corresponding to the excess air quantity demand can be set to be a channel structure which is commonly used, such as a rectangle, a trapezoid and a triangle.
In this embodiment, by providing the plurality of ribs 131 at the top end of the valve body 120, when the adjusting member 300 is located at the end position in the closing direction of the valve hole 121, a gap still exists between the adjusting member 300 and the valve body 120, that is, a channel through which fluid can pass still exists, so that the extraction of fluid can be adjusted, and the adjustment of pressure in a small range can be realized.
Alternatively, the ribs 131 may be cylindrical small protrusions. Optionally, the upper surface of the rib 131 may be a plane; or the upper surface of the rib 131 may be a curved surface. Optionally, the ribs 131 may be solid structures; alternatively, the rib 131 may have a hollow structure. Compared with the valve core body 120, the size of the rib 131 is smaller, and the specific size of the rib 131 can be selected and set according to actual conditions as long as a small amount of air flow can conveniently pass through the rib.
It should be noted that, in this embodiment, specific shape structures of the valve core body 120 or the rib 131 are not limited, for example, a cylindrical shape may be adopted, a square cylindrical shape may also be adopted, a trapezoidal cylindrical shape may also be adopted, or a triangular cylindrical shape may also be adopted, and of course, other regular or irregular forming structures may also be adopted.
The rib 131 may be formed in various manners. Optionally, the rib 131 is integrally formed with the valve core body 120. For example, the rib 131 and the valve core body 120 may be formed by injection molding. By integrally forming the convex rib 131 and the valve core body 120, the integrity is good, the structural connection is reliable, and the cost is low.
Optionally, the bottom of the rib 131 is fixedly connected to the top end of the valve core body 120. For example, the rib 131 may be manufactured separately from the valve cartridge body 120, and then the rib 131 may be welded to the valve cartridge body 120. Therefore, the structure is simple, and the processing and the manufacturing are convenient.
In other embodiments, as shown in fig. 3, the top end of the valve element body 120 is inclined, and according to the requirement of the ventilation amount, the inclination angle of the top end of the valve element body 120 is calculated and tested to be 1.54 °, and further, at least a part of the top end of the valve element body 120 is provided with a groove 132 to form the drainage portion 130. For example, the cartridge body 120 includes a first tip and a second tip, with a height difference between the first tip and the second tip. Alternatively, the groove 132 includes a first groove wall and a second groove wall that are oppositely disposed, and a height difference exists between the first groove wall and the second groove wall. The present embodiment can achieve the same or similar effects as the above-mentioned rib 131 by modifying the angle of the contact surface between the bottom end of the adjusting member 300 and the valve core and adding the groove 132 on the contact surface.
Thus, the drainage portion 130 may also be implemented with the inclination and the groove 132 based on the same or similar principle as the plurality of ribs 131. In this way, by arranging the top end of the valve core body 120 obliquely and arranging the groove 132 at the top end of the valve core body 120, when the adjusting member 300 is closed, a gap exists between the adjusting member 300 and the valve core body 120, which can be used for increasing the flow rate when the adjusting member 300 is closed, so that when the adjusting member 300 is closed, extra air flow still passes through, and therefore, the crankcase pressure requirement of a small adjusting range can be realized by using the adjusting member 300 with lower cost, such as the valve membrane 310.
In addition, in other embodiments, besides the above-mentioned manner of using the plurality of ribs 131 or the inclined grooves 132, the drainage portion 130 may also be implemented in other manners as long as a small portion of the air flow can still pass through the drainage portion when the adjusting member 300 is closed.
In some embodiments, the adjustment member 300 includes a valve diaphragm 310, the valve diaphragm 310 being movable in an axial direction of the valve diaphragm 310 to adjust a pressure of the valve chamber. In addition, the adjusting member 300 may further include other partial structures such as a connecting structure, which is not limited in this embodiment.
Alternatively, the valve diaphragm 310 may be made of rubber, that is, the valve diaphragm 310 may be a rubber diaphragm. Alternatively, one side of the adjustment member 300, such as the valve diaphragm 310, abuts against the inner wall of the valve cover 200, the middle of the other side of the adjustment member 300, such as the valve diaphragm 310, has a protrusion, one end of the elastic member 400, such as a spring, is sleeved on the protrusion, and the other end of the elastic member 400 abuts against the inner wall of the valve seat 100. Alternatively, in another embodiment, the other end of the elastic member 400 may be connected to the valve seat 100 via a connecting portion, and one end of the elastic member 400 may be brought into contact with the valve diaphragm 310.
Optionally, the valve cover 200 is provided with an air inlet, which is communicated with the valve cavity. Alternatively, an air inlet may be provided in the middle of the valve cover 200 facing away from the valve chamber, the air inlet communicating with the valve chamber.
It will be appreciated that since the inlet port on the valve cover 200 communicates the outside of the inlet port with the valve chamber and one side of the adjustment member 300, such as the valve diaphragm 310, abuts against the inner wall of the valve cover 200, when the air pressure in the valve chamber is inconsistent with the outside air pressure, the valve diaphragm 310 moves relative to the valve cover 200 to adjust the pressure in the valve chamber as the air pressure varies.
Alternatively, the bottom of the valve seat 100 may be provided with a plurality of gas passages in the circumferential direction. Alternatively, the plurality of gas passages may be gas passages uniformly distributed on the valve seat 100 in a uniform shape.
Optionally, the valve seat 100 is made of plastic. The valve seat 100 is made of plastic, so that the valve seat is low in cost and easy to produce and manufacture. Optionally, the material of the valve cover 200 may also be plastic.
Alternatively, the valve seat 100 and the valve cover 200 may be welded, snapped, screwed, riveted, etc.
According to the embodiment, the pressure regulating valve comprises a valve seat 100, a valve cover 200, a regulating member 300 and an elastic element 400, wherein a valve core 110 is arranged in the valve seat 100, the valve core 110 comprises a valve core body 120 and a drainage part 130 arranged at the top end of the valve core body 120, and the drainage part 130 can be realized by a plurality of convex ribs 131 or inclined grooves 132; for example, the cylindrical rib 131 and the valve core body 120 may be integrally formed by injection molding, or an additional small rib 131 may be manufactured and then the rib 131 and the valve core body 120 may be welded together. In use, the elastic member 400 may be elastically assembled to the plastic valve seat 100, and then the adjusting member 300 may be assembled to the valve cover 200, and the valve cover 200 may be assembled to the valve seat 100, for example, the connection between the valve cover 200 and the valve seat 100 may be achieved by welding, snapping, and the like.
In some embodiments, a crankcase ventilation system is provided comprising a crankcase, and further comprising the aforementioned pressure regulating valve, the inlet of which communicates with the crankcase.
Optionally, the crankcase ventilation system comprises an oil-gas separator, the oil-gas separator comprises an oil-gas separation unit and an air outlet, and the air outlet is connected with an air filter; the pressure regulating valve may be disposed between the oil-gas separation unit and the gas outlet.
Alternatively, the outlet of the pressure regulating valve may be connected to an air cleaner of the engine. Alternatively, the outlet of the pressure regulating valve may communicate with the intake manifold of the engine.
The crankcase ventilation system of the embodiment can further use a regulating component with lower cost, such as a valve diaphragm, to meet the requirement of the crankcase pressure with a small regulating range, so that the crankcase pressure is more stable and reasonable when an engine runs.
It should be noted that the crankcase ventilation system of the present application includes the above-mentioned pressure regulating valve, so that the crankcase ventilation system also has the features and technical effects of the above-mentioned pressure regulating valve, and the details are not repeated herein. It should also be noted that the crankcase ventilation system may also include other structures such as a crankcase, an oil-gas separator, etc., and the connection and arrangement of the other structures such as the crankcase, the oil-gas separator, etc. are not limited in the present embodiment, and the core of the crankcase ventilation system includes the pressure regulating valve provided in the present embodiment. The specific installation position or connection mode of the pressure regulating valve may be selected and set according to the implementation, and is not limited thereto.
The invention has not been described in detail and is in part known to those of skill in the art.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A pressure regulating valve, comprising: a valve seat, a valve cover and an adjusting component;
the valve seat is connected with the valve cover, and a valve cavity is formed between the valve seat and the valve cover;
the adjusting component is arranged in the valve cavity, and one side of the adjusting component is abutted against the inner wall of the valve cover;
the valve seat is provided with a valve core positioned in the valve cavity, the valve core comprises a valve core body and a drainage part arranged at the top end of the valve core body, the valve core body is provided with a valve hole, and fluid passes through the valve hole;
the regulating member is displaced between an end position in a closing direction of the valve hole and an open position according to a pressure difference between an upstream side and a downstream side, and fluid may flow through the flow guide portion when the regulating member is at the end position in the closing direction of the valve hole.
2. The pressure-regulating valve according to claim 1, wherein the drain portion includes a plurality of ribs provided at intervals at a top end of the spool body.
3. The pressure regulating valve according to claim 2, wherein the valve body is a hollow cylindrical structure, a plurality of ribs are circumferentially arranged along the top end of the valve body at intervals, and a channel for fluid to pass through is formed between at least two adjacent ribs.
4. The pressure-regulating valve of claim 2, wherein the rib is integrally formed with the spool body;
or the bottom of the convex rib is fixedly connected with the top end of the valve core body.
5. The pressure-regulating valve according to claim 1, wherein the top end of the valve body is inclined, and at least a part of the top end of the valve body is provided with a groove to form the drain portion.
6. The pressure-regulating valve of claim 1, wherein the regulating member comprises a valve diaphragm.
7. The pressure-regulating valve of any one of claims 1 to 6, further comprising an elastic member disposed within the valve chamber.
8. The pressure-regulating valve according to claim 7, wherein the other side of the regulating member has a protrusion in the middle thereof, one end of the elastic member is fitted over the protrusion, and the other end of the elastic member abuts against the inner wall of the valve seat.
9. The pressure-regulating valve according to any one of claims 1 to 6, wherein the valve cover is provided with an air inlet, which communicates with the valve chamber.
10. A crankcase ventilation system comprising a crankcase, including a pressure regulating valve as claimed in any one of claims 1 to 9, an inlet of the pressure regulating valve being in communication with the crankcase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211251720.6A CN115638278A (en) | 2022-10-13 | 2022-10-13 | Pressure regulating valve and crankcase ventilation system with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211251720.6A CN115638278A (en) | 2022-10-13 | 2022-10-13 | Pressure regulating valve and crankcase ventilation system with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115638278A true CN115638278A (en) | 2023-01-24 |
Family
ID=84944138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211251720.6A Pending CN115638278A (en) | 2022-10-13 | 2022-10-13 | Pressure regulating valve and crankcase ventilation system with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115638278A (en) |
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2022
- 2022-10-13 CN CN202211251720.6A patent/CN115638278A/en active Pending
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