Detachable respirator valve plate assembly

Abstract

The utility model relates to a detachable respirator valve plate assembly. The device comprises a cylinder head cover, a partial load breathing apparatus, a full load breathing apparatus and a breathing apparatus valve cover, wherein a full load breathing cavity, a partial load breathing cavity, a first external pipe and a second external pipe are arranged in the breathing apparatus valve cover; the full-load respirator position is composed of a main air hole, a first metal sheet and a first positioning pin; the partial load respirator is composed of an auxiliary air hole, a second metal sheet and a second positioning pin. The full-load respirator and the partial-load respirator both adopt metal sheets with fixed single sides to realize the function of a one-way valve, and the high-temperature resistance, wear resistance and rebound characteristics of the metal are favorable for long-time work in a severe working condition, so that better durability is achieved, and the maintenance frequency can be obviously reduced; in addition, the two metal sheets are assembled by adopting a positioning pin unilateral fixing mode, so that the metal sheets have the characteristic of convenience in disassembly and can be independently replaced, the maintenance cost can be obviously reduced, the maintenance process is simplified, and the maintenance time consumption is reduced.

Description

Technical Field

[0001] This utility model relates to a breather valve assembly for an automobile engine, and more particularly to a detachable breather valve plate assembly. Background Technology

[0002] To prevent excessive crankcase pressure, extend engine oil life, reduce component wear and corrosion, and prevent engine oil leaks, crankcase ventilation is essential. Furthermore, to meet increasingly stringent emission requirements and improve fuel economy, crankcase ventilation systems must be designed during the automotive engine design process. The ventilation system must effectively expel exhaust gases and separate oil and gas, preventing oil and gas from entering the intake system. Therefore, ventilation systems generally consist of an oil-gas separator assembly and a breather valve assembly. The oil-gas separator assembly typically has multiple gas-liquid separation structures to separate oil and gas (exhaust gas) in the crankcase ventilation system. This allows the separated lubricating oil to flow back into the crankcase, while the gas is distributed by the breather valve assembly. The main gas flows through pipes to the air filter, then through the turbocharger and intercooler before entering the intake manifold, while some gas flows through pipes to the intake manifold side.

[0003] Current breather valve assemblies control unidirectional gas flow through two one-way valves. These one-way valves are made of rubber and are generally integrated with the breather valve housing, making them impossible to disassemble. Most one-way valves are thin-plate type, which frequently suffers from wear, aging, deformation, and various problems such as failure to open or return to their original position after prolonged use, leading to engine oil leaks. Therefore, the entire breather valve assembly must be replaced, resulting in relatively high maintenance costs and indirectly increasing the user's operating expenses. Summary of the Invention

[0004] This invention provides a detachable respirator valve assembly, solving the problem in the prior art where the rubber check valve in the respirator valve assembly has a short service life and cannot be replaced separately.

[0005] The above-mentioned technical problems of this utility model are mainly solved by the following technical solution: a detachable breather valve plate assembly, including a cylinder head cover located on the crankcase, a partial load breather disposed on the cylinder head cover, a full load breather disposed on the cylinder head cover, and a breather valve cover disposed on the cylinder head cover. The partial load breather and the full load breather are both located within the coverage area of ​​the breather valve cover. A partition is provided inside the breather valve cover, which divides the internal cavity of the breather valve cover into a full load breathing chamber and a partial load breathing chamber. The breather valve cover is also provided with a valve plate corresponding to the full load breather. The breathing chamber is connected to a first external pipe and a second external pipe connected to the partial load breathing chamber; the full load respirator is located in the full load breathing chamber and consists of a main air port, a first metal plate covering the main air port, and a first positioning pin for fixing the first metal plate on one side; the partial load respirator is located in the partial load breathing chamber and consists of an auxiliary air port, a second metal plate covering the auxiliary air port, and a second positioning pin for fixing the second metal plate on one side; both the first and second metal plates are thin sheets that are easily deformable; the first external pipe is connected to the air filter and the second external pipe is connected to the intake manifold side.

[0006] In this invention, both the main and auxiliary air ports are connected to the oil-gas separator assembly located below the cylinder head cover. The full-load breather chamber flows to the air filter via the first external pipe, and then enters the intake manifold after passing through the turbocharger and intercooler. When the turbocharger is working, it generates a large suction force, i.e., negative pressure, causing the air pressure after the air filter to be lower than the air pressure in the crankcase. At this time, the pressure difference will push the first metal plate in the full-load breather upward, thereby causing the gas to flow to the full-load breather chamber side. Conversely, when the turbocharger stops working, the air pressure after the air filter is higher than the air pressure in the crankcase, and the first metal plate will stick tightly to the cylinder head cover, preventing the gas from flowing to the crankcase, thus acting as a one-way valve. The partial-load breather flows to the intake manifold side via the second external pipe. When the engine is idling or running at low load, a high vacuum will be generated in the intake manifold, resulting in negative pressure on the intake manifold side. The pressure difference will push the second metal plate in the partial-load breather upward, thereby causing the gas to flow to the partial-load breather chamber side. Since both the first and second metal plates in this invention are made of metal, negative pressure is generated when the intake manifold is running. The high temperature resistance, wear resistance, and resilience of metal help it to work for a long time under harsh conditions. Therefore, this invention itself has better durability and can significantly reduce the frequency of maintenance. At the same time, since both the first and second metal plates are assembled by fixing them on one side with positioning pins, they also have the feature of disassembly. Once a metal plate is damaged, it can be replaced individually, which can significantly reduce maintenance costs, simplify the maintenance process, and reduce maintenance time.

[0007] Furthermore, a metal limiting piece is fixed to the first positioning pin on the upper side of the first metal plate, and a gap is formed between the metal limiting piece and the first metal plate, the gap being between 3 and 4 millimeters. During normal operation, the ventilation volume of the full-load respirator is much greater than that of the partial-load respirator. Therefore, the sizes of the main air vent and the full-load breathing chamber are significantly larger than those of the auxiliary air vent and the partial-load breathing chamber, and the size of the first metal plate is significantly larger. If the upward rotation amplitude of the first metal plate is not limited, excessive pressure difference will lead to excessive airflow, resulting in an excessive upward rotation amplitude of the first metal plate. Prolonged exposure to large-amplitude repeated rotation of the first metal plate will make it more prone to metal fatigue, thus significantly reducing its lifespan. To prevent excessive rotation amplitude when the first metal plate rotates upward, this invention adds a metal limiting piece to avoid the above problems.

[0008] Therefore, compared with the prior art, this utility model has the following characteristics: 1. Both the full-load and partial-load respirators in this utility model use a metal plate fixed on one side to realize the function of the one-way valve. The high temperature resistance, wear resistance and resilience of the metal help it to work for a long time in harsh working conditions. Therefore, this utility model itself has better durability and can significantly reduce the frequency of maintenance; 2. Since the first metal plate and the second metal plate are both assembled by fixing on one side with positioning pins, they also have the characteristics of easy disassembly. They can be replaced individually, which can significantly reduce maintenance costs, simplify the maintenance process and reduce maintenance time. Attached Figure Description

[0009] Appendix Figure 1 This is a schematic diagram of the structure of this utility model;

[0010] Appendix Figure 2 This is another structural schematic diagram of the present invention;

[0011] Appendix Figure 3 This is a simplified structural diagram of a full-load respirator;

[0012] Appendix Figure 4 This is a simplified structural diagram of a partial load respirator.

[0013] In the diagram: 10, cylinder head cover; 20, full-load breather; 30, partial-load breather; 40, breather valve cover; 41, partition; 42, full-load breather chamber; 43, partial-load breather chamber; 44, first external pipe; 45, second external pipe; 21, main air port; 22, first metal plate; 23, first positioning pin; 24, metal limiting plate; 25, first sealing ring; 31, auxiliary air port; 32, second metal plate; 33, second positioning pin; 34, second sealing ring. Detailed Implementation

[0014] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0015] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0016] Example 1: See Figure 1 , Figure 2 , Figure 3 and Figure 4 A detachable breather valve assembly includes a cylinder head cover 10 located on the crankcase, a partial-load breather 30 mounted on the cylinder head cover 10, a full-load breather 20 mounted on the cylinder head cover 10, and a breather valve cover 40 covering the cylinder head cover 10. The partial-load breather 30 and the full-load breather 20 are both located within the coverage area of ​​the breather valve cover 40. The breather valve cover 40 has an internal partition 41 that divides the internal cavity of the breather valve cover 40 into a full-load breathing chamber 42 and a partial-load breathing chamber 43. The breather valve cover 40 also has a first external connecting pipe 44 communicating with the full-load breathing chamber 42 and a second external connecting pipe 45 communicating with the partial-load breathing chamber 43. The full-load breather 20... The 0 is located in the full-load breathing chamber 42 and consists of a main air port 21, a first metal plate 22 covering the main air port 21, and a first positioning pin 23 for fixing the first metal plate 22 on one side. The partial-load breathing device 30 is located in the partial-load breathing chamber 43 and consists of an auxiliary air port 31, a second metal plate 32 covering the auxiliary air port 31, and a second positioning pin 33 for fixing the second metal plate 32 on one side. The first metal plate 22 and the second metal plate 32 are both easily deformable stainless steel sheets with a thickness of about 0.15 mm. The first external pipe 44 is connected to the air filter and the second external pipe 45 is connected to the intake manifold side. The first positioning pin 23 and the second positioning pin 33 are both fixed to the cylinder head cover 10 by bolt screwing.

[0017] In this embodiment, both the main air port 21 and the auxiliary air port 31 are connected to the oil-gas separator assembly located below the cylinder head cover 10. The full-load breather chamber 42 flows to the air filter via the first external pipe 44, and then enters the intake manifold after passing through the turbocharger and intercooler. When the turbocharger is working, it generates a large suction force, i.e., negative pressure, which causes the air pressure after the air filter to be lower than the air pressure in the crankcase. At this time, the pressure difference will push the first metal plate 22 in the full-load breather 20 to flip upward, thereby causing the gas to flow towards the full-load breather chamber 42. Conversely, when the turbocharger stops... During operation, the air pressure after the air filter is greater than the air pressure inside the crankcase. The first metal plate 22 will stick tightly to the cylinder head cover 10, preventing gas from flowing to the crankcase, thus acting as a one-way valve. The partial load breather 30 flows to the intake manifold side through the second external pipe 45. When the engine is idling or running at low load, a high vacuum will be generated in the intake manifold, resulting in negative pressure on the intake manifold side. The pressure difference will push the second metal plate 32 inside the partial load breather 30 upward, thereby causing the gas to flow to the partial load breathing chamber 43 side. Since both the first metal plate 22 and the second metal plate 32 in this embodiment are made of metal, negative pressure will be generated when the intake manifold is running. The high temperature resistance, wear resistance and resilience of metal help it to work for a long time in harsh conditions. Therefore, this embodiment itself has better durability and can significantly reduce the frequency of maintenance. At the same time, since both the first metal plate 22 and the second metal plate 32 are assembled by fixing one side with positioning pins, they also have the feature of disassembly. Once the metal plate is damaged, it can be replaced individually, which can significantly reduce maintenance costs, simplify the maintenance process and reduce maintenance time.

[0018] See Figure 2 and Figure 3 A metal limiting piece 24 located on the upper side of the first metal piece 22 is also fixed on the first positioning pin 23. A gap of 3.5 mm is formed between the metal limiting piece 24 and the first metal piece 22. In normal operation of this embodiment, the ventilation volume of the full-load respirator 20 is much greater than that of the partial-load respirator 30. Therefore, the size of the main air port 21 and the full-load breathing chamber 42 are significantly larger than the secondary air port 31 and the partial-load breathing chamber 43. The size of the first metal piece 22 is also significantly larger. If the upward rotation of the first metal piece 22 is not limited, the excessive pressure difference will lead to excessive airflow, which in turn will cause the upward rotation of the first metal piece 22 to be too large. The first metal piece 22, which is subjected to large-amplitude repeated rotation for a long time, will be more prone to metal fatigue, which will lead to a significant reduction in its lifespan. In order to prevent the first metal piece 22 from rotating too much when it rotates upward, this embodiment adds a metal limiting piece 24 to avoid the above problems.

[0019] See Figure 2A first sealing ring 25 is provided on the cylinder head cover 10 and located on the outer ring of the full-load breather 20, and a second sealing ring 34 is provided on the cylinder head cover 10 and located on the outer ring of the partial-load breather 30. Both sealing rings are tightly fitted to the breather valve cover 40. The function of the two sealing rings is to enhance the airtightness between the cylinder head cover 10 and the breather valve cover 40. The material of the two sealing rings is heat-resistant rubber.

[0020] This invention can be modified in many ways, as will be apparent to those skilled in the art, and such modifications are not considered to depart from the scope of this invention. All such modifications that are obvious to those skilled in the art are included within the scope of these claims.

Claims

1. A detachable breather valve assembly, comprising a cylinder head cover, a partial-load breather disposed on the cylinder head cover, a full-load breather disposed on the cylinder head cover, and a breather valve cover disposed on the cylinder head cover, wherein the partial-load breather and the full-load breather are both located within the coverage area of ​​the breather valve cover, characterized in that: The respirator valve cover has an internal partition that divides the internal cavity of the respirator valve cover into a full-load breathing chamber and a partial-load breathing chamber. The respirator valve cover also has a first external pipe that communicates with the full-load breathing chamber and a second external pipe that communicates with the partial-load breathing chamber. The full-load respirator is located in the full-load breathing chamber and consists of a main air port, a first metal plate covering the main air port, and a first positioning pin for fixing the first metal plate on one side. The partial-load respirator is located in the partial-load breathing chamber and consists of an auxiliary air port, a second metal plate covering the auxiliary air port, and a second positioning pin for fixing the second metal plate on one side.

2. The detachable respirator valve assembly according to claim 1, characterized in that: The first positioning pin is also fixed with a metal limiting piece located on the upper side of the first metal sheet, and a gap is formed between the metal limiting piece and the first metal sheet, which is between 3 and 4 millimeters.

3. The detachable respirator valve assembly according to claim 1, characterized in that: A first sealing ring is provided on the cylinder head cover and located on the outer ring of the full-load breather, and a second sealing ring is provided on the cylinder head cover and located on the outer ring of the partial-load breather. Both sealing rings are tightly fitted to the breather valve cover.

4. The detachable respirator valve assembly according to claim 1, characterized in that: Both the first locating pin and the second locating pin are fixedly engaged with the cylinder head cover by bolt screwing.

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