TWM654265U - Air filter assembly - Google Patents

Abstract

This invention is related to an air filter assembly connected to an engine, including an air filter body, an intake pipe and an oil and gas recovery pipe. The air filter body includes an air filter box and an air filter cover set on the air filter box, and the air filter box is provided with a first connection hole and a second connection hole. One end of the intake pipe is connected to the first connection hole, and the other end is connected to the engine. A partition is arranged on the outer wall of the intake pipe, and the front section of the intake pipe penetrates into the first connection hole, so that the partition is accommodated in the air filter box and is opposite to the rear side of the second connection hole. One end of the oil and gas recovery pipe is connected to the second connection hole, and the other end is connected to the oil and gas separation chamber of a cylinder head cover of the engine. In this way, the structure of the air filter assembly can be simplified, its volume can be increased, and the engine performance can be improved.

Description

Air filter assembly

This creation relates to an air filter assembly, particularly an air filter assembly suitable for a motorcycle.

In recent years, due to the strict environmental regulations and energy crisis in various countries around the world, various automobile and motorcycle manufacturers have actively developed low-pollution, low-fuel-consumption and high-performance engines. Among them, the engine crankshaft forced ventilation system (PCV) is one of the most commonly used technologies to reduce exhaust pollution, ensuring that the unburned mixed gas is recycled to the air filter assembly and then re-enters the cylinder for combustion, thereby minimizing exhaust gas emissions.

Common engine crankshaft forced ventilation systems can be divided into two types according to the different positions of the oil-gas separation chamber. The first type is a separated structure. Please refer to Figure 1, which is a schematic diagram of the structure in which the oil-gas separation chamber 910' is arranged outside the air filter body 92'. The engine blowby gas of this air filter assembly 1' comes out from the oil-gas separation chamber 99' of the cylinder head cover, and is separated by the oil-gas recovery pipe 933' to the oil-gas separation chamber 910'. The gas G' is recovered to the air filter body 92' and enters the cylinder head 97' again for combustion. The liquid L' is stored in the waste oil pipe 98'. Since the oil-gas separation chamber 910' is arranged on the outside of the engine 10', the liquid L' inside the structure is easy to freeze in cold regions, causing the oil-gas recovery pipe 933' to be blocked, resulting in failure of internal engine parts, such as oil seals and O-rings spraying.

The second type is an integrated structure. Please refer to Figure 2, which is a schematic diagram of the structure in which the oil-gas separation chamber 910" is integrated into the air filter body 92". The engine blowby gas of this air filter assembly 1" comes out from the oil-gas separation chamber 99" on the cylinder head cover, passes through the oil-gas recovery pipe 933" to the air filter body 92", and is then separated by the labyrinth partition 981" and the sponge 982". The gas G" enters the cylinder head 97" again for combustion, and the separated liquid L" is stored in the oil drain pipe 932". Although both of the above structures can effectively handle unburned mixed gas, their structures are too complicated, resulting in large size and high cost, making it impossible to increase the storage space of the vehicle.

Because of this, based on the spirit of active creation, I was eager to think of an air filtration assembly that could solve the above problems. After several years of research and experiments, I finally completed this creation.

The main purpose of this invention is to provide an air filter assembly, which sets a baffle on the outer wall of the intake pipe, so that the blow-by gas of the engine comes out from the oil-gas separation chamber of the cylinder head cover, and goes to the air filter through the oil-gas recovery pipe. Then the blow-by gas of the engine hits the baffle on the intake pipe to separate the gas and liquid. The gas enters the cylinder again for combustion, and the separated liquid is stored in the oil drain pipe. Since the labyrinth baffle and sponge structure in the conventional air filter assembly are eliminated, the engine crankshaft forced ventilation is achieved through a simplified structure, reducing emission pollution. At the same time, by simplifying the component structure and integrating the oil-gas separation chamber and the air filter body, the vehicle's storage box space can be increased, and the volume of the air filter assembly can be increased, thereby improving engine performance.

To achieve the above purpose, the air filter assembly of the present invention is connected to an engine, including an air filter body, an intake pipe and an oil and gas recovery pipe. The air filter body includes an air filter box and an air filter cover arranged on the air filter box, and the air filter box is provided with a first connection hole and a second connection hole. One end of the intake pipe is connected to the first connection hole, and the other end of the intake pipe is connected to the engine. A partition is arranged on the outer wall of the intake pipe, and the front section of the intake pipe penetrates into the first connection hole so that the partition is accommodated in the air filter box and is opposite to the rear side of the second connection hole. One end of the oil and gas recovery pipe is connected to the second connection hole, and the other end of the oil and gas recovery pipe is connected to the oil and gas separation chamber of a cylinder head cover of the engine.

Through the above design, the present invention not only simplifies the structure of the air filter assembly by directing the engine blow-by gas to face the baffle disposed on the outer wall of the intake pipe, but also efficiently achieves the oil, water, and gas separation function of the engine blow-by gas. At the same time, the oil and gas recovery pipe of the present invention can be designed to be installed close to the engine, so it is not easy to cause the oil and gas recovery pipe to be blocked due to ice, thereby improving reliability and reducing subsequent maintenance costs.

The partition plate and the air inlet pipe may be an integrated structure; the partition plate and the air inlet pipe may also be a combined structure.

The air filter body can accommodate an air filter core support seat and an air filter core. The air filter core can be assembled on the air filter core support seat to filter the intake air of the engine to ensure that the dirt in the environment will not enter the cylinder and cause engine damage.

The air filter assembly may include an air intake duct that can be connected to the air filter cover and can be disposed between the air filter core and the air filter cover. This can increase the air intake volume of the engine and achieve the effect of guiding the air intake, providing excellent power vehicle commercial performance.

The air filter assembly may include an oil pipe connected to a third connection hole of the air filter housing. The third connection hole may be located on the opposite side of the second connection hole to store liquid separated from the engine blowby gas.

The blow-by gas from the oil-gas separation chamber of the cylinder head cover can be transported to the air filter assembly through the oil-gas recovery pipe and can be separated by the partition plate into a recovery gas and a recovery liquid. The recovery gas can enter the intake pipe, and the recovery liquid can enter the oil drain pipe. In this way, the unburned mixed gas of the engine can be further recovered to minimize the exhaust gas.

The above overview and the following detailed description are exemplary in nature and are intended to further illustrate the scope of the patent application for this creation. Other purposes and advantages of this creation will be explained in the subsequent descriptions and illustrations.

Please refer to Figures 3 to 5, which are respectively a schematic diagram of the structure of an air filter assembly of a preferred embodiment of the present invention, the A-A cross-sectional view of Figure 3, and an exploded view of an air filter assembly of a preferred embodiment of the present invention. The figure shows an air filter assembly 1, which is connected to an engine 10 and mainly includes an air filter body 2, an intake pipe 31, an oil drain pipe 32, and an oil and gas recovery pipe 33. The air filter body 2 includes an air filter box 21 and an air filter cover 22, and an air filter core support seat 24, an air filter core 25, and an air intake duct 34 are disposed therein. The air filter cover 22 is assembled on the air filter housing 21 through a first sealing member 23 to achieve a sealing effect, the air filter core 25 is assembled on the air filter core support seat 24 through a second sealing member 26 to achieve a sealing effect, and the air intake duct 34 is connected to the air filter cover 22 and is arranged between the air filter core 25 and the air filter cover 22.

In this embodiment, the air filter housing 21 is provided with a first connection hole 211, a second connection hole 212 and a third connection hole 213. The first connection hole 211 is adjacent to the second connection hole 212, and the third connection hole 213 is located on the opposite side of the second connection hole 212. In addition, one end of the intake pipe 31 is connected to the first connection hole 211 and a partition plate 311 is disposed on the outer wall of the intake pipe 31. The front end of the intake pipe 31 penetrates into the first connection hole 211, so that the partition plate 311 is accommodated in the air filter housing 21 and is opposite to the rear side of the second connection hole 212. The other end of the intake pipe 31 is connected to the engine 10 through a first locking member 41. One end of the oil drain pipe 32 is connected to the third connection hole 213 through a second locking member 42, and the other end of the oil drain pipe 32 is a closed end. One end of the oil and gas recovery pipe 33 is connected to the second connection hole 212, and the other end of the oil and gas recovery pipe 33 is connected to a cylinder head cover oil and gas separation chamber 9 of the engine 10. In this embodiment, the partition 311 and the intake pipe 31 are an integrated structure. In another embodiment, the partition 311 and the intake pipe 31 are a combined structure.

By means of the above-mentioned design, the blow-by gas from the oil-gas separation chamber 9 of the cylinder head cover is transported to the air filter assembly 1 through the oil-gas recovery pipe 33 and is separated by the partition 311 into a recovery gas G and a recovery liquid L. The recovery gas G enters the intake pipe 31 and enters the cylinder head 7 again for combustion, and the recovery liquid L enters the oil drain pipe 32 and is stored therein.

In addition, the present invention simplifies the structure of the air filter assembly by directing the engine blow-by gas toward the partition 311 disposed on the outer wall of the intake pipe 31, and can more efficiently achieve the oil, water, and gas separation function of the engine blow-by gas. At the same time, the oil and gas recovery pipe 33 of the present invention is disposed adjacent to the engine 10, so it is not easy for the oil and gas recovery pipe 33 to be blocked due to freezing, thereby improving reliability and reducing subsequent maintenance costs.

The above embodiments are merely examples for the convenience of explanation. The scope of rights claimed by this invention should be based on the scope of the patent application, and is not limited to the above embodiments.

1,1’,1”: Air filter assembly 2,92’,92”: Air filter body 21: Air filter housing 211: First connection hole 212: Second connection hole 213: Third connection hole 22: Air filter cover 23: First seal 24: Air filter core support seat 25: Air filter core 26: Second seal 31: Intake pipe 311: Baffle 32,932”: Oil drain pipe 33,933’,933”: Oil and gas recovery pipe 34: Air intake duct 41: First locking piece 42: Second locking piece 7,97’,97”: Cylinder head 9,99’,99”: Cylinder head cover oil and gas separation chamber 98’: Waste oil pipe 910’,910”: Oil and gas separation chamber 981”: Labyrinth partition 982”: Sponge 10,10’: Engine L,L’,L”: Liquid G,G’,G”: Gas

FIG. 1 is a schematic diagram of a structure in which the oil-gas separation chamber is arranged outside the air filter body. FIG. 2 is a schematic diagram of a structure in which the oil-gas separation chamber is integrated inside the air filter body. FIG. 3 is a schematic diagram of a structure of an air filter assembly of a preferred embodiment of the present invention. FIG. 4 is an A-A cross-sectional view of FIG. 3. FIG. 5 is an exploded view of an air filter assembly of a preferred embodiment of the present invention.

1: Air filter assembly

2: Air filter body

24: Air filter core support seat

25: Air filter core

31: Intake pipe

32: Oil drain pipe

33: Oil and gas recovery pipe

7: Cylinder head

9: Cylinder head cover oil and gas separation chamber

10: Engine

L:Liquid

G: Gas

Claims (7)

An air filter assembly connected to an engine comprises: an air filter body, comprising an air filter box and an air filter cover mounted on the air filter box, the air filter box being provided with a first connection hole and a second connection hole; an intake pipe, one end of which is connected to the first connection hole and the other end is connected to the engine, a partition is provided on the outer wall of the intake pipe, and the front section of the intake pipe penetrates the first connection hole so that the partition is accommodated in the air filter box and faces the rear side of the second connection hole; and an oil and gas recovery pipe, one end of which is connected to the second connection hole and the other end is connected to an oil and gas separation chamber of a cylinder head cover of the engine. An air filter assembly as described in claim 1, wherein the baffle and the intake pipe are an integrated structure. An air filter assembly as described in claim 1, wherein the baffle and the intake pipe are a combined structure. An air filter assembly as described in claim 1, wherein the air filter body contains an air filter core support seat and an air filter core, and the air filter core is assembled on the air filter core support seat. The air filter assembly as described in claim 4 further includes an air intake duct connected to the air filter cover and disposed between the air filter core and the air filter cover. The air filter assembly as described in claim 1 further includes an oil pipe connected to a third connection hole of the air filter box, and the third connection hole is located on the opposite side of the second connection hole. An air filter assembly as described in claim 6, wherein the engine blowby gas from the oil-gas separation chamber of the cylinder head cover is transported to the air filter assembly through the oil-gas recovery pipe and is separated by the partition into a recovered gas and a recovered liquid, the recovered gas enters the intake pipe, and the recovered liquid enters the oil drain pipe.

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