Air filter assembly and marine engine

Abstract

The utility model discloses an air filter assembly, including air filter and the exhaust pipe for collecting engine oil exhaust gas in the communication in engine box, exhaust pipe will engine oil exhaust gas in the engine box delivery to air filter, and with air mixes and enters engine combustion chamber and burns, the utility model discloses, the engine oil exhaust gas generated by engine is delivered to air filter through the pipeline, and with air mixes and reenters engine and burns, can effectively improve the pressure environment in engine box while guaranteeing engine air intake and normal operation, and the engine oil exhaust gas generated is burned again, effectively reduces the pollution to the environment, and promotes the work efficiency of engine.

Description

Technical Field

[0001] This utility model relates to the field of air filters, and in particular to an air filter assembly for marine engines. Background Technology

[0002] Marine engines are typically high-speed models, with their operating speeds generally stable between 3200 rpm and 5500 rpm. While this high-speed characteristic provides powerful propulsion for ships and meets their speed requirements, it also generates a series of significant technical problems.

[0003] When the engine is running at high speed, the reciprocating speed of the piston increases dramatically. This makes it easier for the high-temperature exhaust gas generated during combustion to leak into the housing through the gap between the piston rings and the cylinder wall. This high-temperature exhaust gas that leaks into the housing mixes with the engine oil to form oil fumes. Because the internal space of the housing is relatively closed and the airflow circulation is not smooth, the discharge speed is very slow, making it difficult to form the negative pressure environment required to maintain the normal operation of the engine. In some operating conditions, there may even be positive pressure inside the housing. Insufficient negative pressure or positive pressure inside the housing will further aggravate the accumulation of oil fumes in the housing, forming a vicious cycle of "obstructed exhaust gas discharge - pressure imbalance - even more difficult discharge", which will seriously affect the overall operating stability of the engine.

[0004] Meanwhile, the oil fumes that are barely expelled from the engine compartment, due to insufficient oil-gas separation during the exhaust process, will drip directly onto the external surface of the engine and surrounding areas as oil droplets. This not only corrodes the engine's metal components, shortens the equipment's lifespan, and increases maintenance costs, but also directly pollutes the waters and atmosphere through which the ship navigates, seriously violating the increasingly stringent environmental regulations for ships.

[0005] Furthermore, the air filters (intake pipes) equipped on existing marine engines generally adopt a simple pipe-type design, with only a mesh screen at the air inlet to intercept larger particulate impurities. Because the intake pipe itself has a certain length, airflow is affected by frictional resistance from the pipe walls and airflow turbulence as it flows through the pipe, inevitably resulting in a loss of intake air volume. Insufficient intake air volume directly leads to incomplete combustion of fuel in the engine cylinders, significantly reducing the engine's actual output power and preventing it from reaching the designed power level. This, in turn, affects the ship's speed, load capacity, and fuel economy, reducing overall operating efficiency.

[0006] Therefore, there is an urgent need to develop an air filter assembly and marine engine that can burn off the exhaust oil and effectively reduce pollution while ensuring the engine's air intake and normal operation. Utility Model Content

[0007] In view of this, the purpose of this utility model is to provide an air filter assembly and a marine engine that can burn the exhaust oil and gas while ensuring the engine's air intake and normal operation, and effectively reduce pollution.

[0008] This utility model discloses an air filter assembly, including an air filter and an exhaust pipe connected to the engine housing for collecting oil exhaust gas. The exhaust pipe transports the oil exhaust gas from the engine housing to the air filter, where it mixes with air and then enters the engine combustion chamber for combustion.

[0009] Furthermore, the air filter is detachably and fixedly installed on the engine's carburetor.

[0010] Furthermore, the air filter includes a housing with a gas outlet connected to the intake manifold of the carburetor.

[0011] Furthermore, the gas outlet of the housing is connected to the air intake of the carburetor via a clamp.

[0012] Furthermore, the flow area inside the housing is larger than the flow area of ​​the carburetor's intake passage.

[0013] Furthermore, the housing is provided with an air inlet, which is detachably equipped with a dust cover and faces downwards.

[0014] Furthermore, the air filter also includes an exhaust nozzle, which is located inside the housing to introduce oil exhaust gas from the exhaust pipe into the internal space of the housing and mix it with air.

[0015] Furthermore, the bottom of the exhaust nozzle is provided with an oil baffle plate for forming an exhaust port, which faces the air intake of the carburetor and is close to the choke.

[0016] Furthermore, it also includes an exhaust gas connector, which connects the exhaust gas pipe and the exhaust gas nozzle.

[0017] A marine engine equipped with an air filter assembly as described above.

[0018] The beneficial effects of this utility model are as follows: The air filter assembly and marine engine of this utility model transport the engine oil exhaust gas generated by the engine to the air filter through the pipeline, mix it with air and then re-enter the engine for combustion. While ensuring the engine intake and normal operation, it can effectively improve the pressure environment inside the engine box and burn the generated engine oil exhaust gas, effectively reducing environmental pollution and improving the engine's working efficiency. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0020] Figure 1 This is an installation diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the air filter structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the installation cross-section of this utility model. Detailed Implementation

[0023] Figure 1 This is an installation diagram of the present invention. Figure 2 This is a schematic diagram of the air filter structure of this utility model. Figure 3 As shown in the figure, this is a schematic diagram of the installation cross-section of the present invention: An air filter assembly of this embodiment includes an air filter 2 and an exhaust pipe 3 connected to the engine housing 1 for collecting oil exhaust gas. The exhaust pipe 3 transports the oil exhaust gas from the engine housing 1 to the air filter 2, where it mixes with air and enters the combustion chamber of the engine 1 for combustion. The air filter assembly of the present invention includes an air filter 2 and an exhaust pipe 3. The air filter 2 is installed in a marine engine, which is typically a high-revving engine. When the engine 1 is running at high speed, the reciprocating speed of the piston increases dramatically, which... The high-temperature exhaust gas generated during combustion is more likely to leak into the housing through the gap between the piston rings and the cylinder wall, affecting the internal pressure balance of the engine housing. Therefore, the air filter 2 of this application can be connected to the engine housing through the exhaust pipe 3 for collecting the oil exhaust gas generated in the engine housing. The oil exhaust gas in the engine housing can be transported to the air filter 2, mixed with air, and then entered the combustion chamber of the engine housing for combustion. This can effectively improve the pressure environment in the engine housing and re-burn the generated oil exhaust gas, effectively reducing environmental pollution and improving the working efficiency of the engine.

[0024] In this embodiment, the air filter 2 is detachably and fixedly installed on the carburetor 4 of the engine 1; as Figure 3 As shown, the air filter 2 is detachably and fixedly installed on the carburetor 4 of the engine 1, which facilitates personnel operation during installation and removal maintenance, and can be used on various engines 1 equipped with the same model of carburetor 4.

[0025] In this embodiment, the air filter 2 includes a housing 201, the housing 201 having a gas outlet 202. The air filter 2 is installed after the carburetor 4, and the gas outlet 202 is connected to the intake manifold of the carburetor 4; Figure 2 and 3As shown, the air filter 2 includes a housing 201 for collecting air and is installed after the carburetor 4. The internal space of the housing 201 is used for mixing gas and is provided with a gas outlet 202 that communicates with the intake passage of the carburetor 4. The mixed gas enters the carburetor 4 of the engine 1 through the gas outlet 202 and further enters the engine 1 for combustion.

[0026] In this embodiment, the gas outlet 202 of the housing 201 is connected to the air intake of the carburetor 4 by a clamp; as Figure 2 and 3 As shown, the gas outlet 202 of the air filter 2 housing 201 and the air intake of the carburetor 4 are connected and fixed with clamps to achieve quick disassembly and assembly. Alternatively, bolts can be used for installation and removal, which will not be elaborated here.

[0027] In this embodiment, the flow area of ​​the internal space of the housing 201 is larger than the flow area of ​​the air intake passage of the carburetor 4; for example Figure 3 As shown, the gas flow area inside the housing 201 is larger than the gas flow area of ​​the carburetor 4's intake passage, which facilitates the engine 1 to draw in more gas into the combustion chamber, and also facilitates the mixing of engine oil exhaust gas with air.

[0028] In this embodiment, the housing 201 is provided with an air inlet, and the air inlet is detachably equipped with a dust cover 206, with the air inlet facing downwards; Figure 2 and 3 As shown, the housing 201 of the air filter 2 is also provided with an air inlet, and a detachable dust cover 206 is provided at the air inlet to prevent debris such as leaves from being sucked into the engine 1. At the same time, since the engine 1 is a marine engine, in order to prevent water from entering the engine 1 through the air filter 2 during use, the air inlet of the housing is oriented downwards.

[0029] In this embodiment, the air filter 2 further includes an exhaust nozzle 204, which is located inside the housing 201 to introduce the oil exhaust gas from the exhaust pipe 3 into the internal space of the housing 201 and mix it with air; Figure 2 and 3 As shown, the air filter 2 is also equipped with an exhaust nozzle 204, which is used to introduce the oil exhaust gas from the exhaust pipe 3 into the internal space of the housing 201 and mix it thoroughly with the air.

[0030] In this embodiment, the exhaust outlet of the exhaust nozzle 204 faces the air intake of the carburetor 4 and is close to the choke; Figure 2 and 3As shown, the exhaust outlet of the exhaust nozzle 204 faces the air intake of the carburetor 4 and is close to the choke of the carburetor 4. This facilitates the mixing of oil exhaust gas with air and draws as much oil exhaust gas as possible into the carburetor 4. At the same time, the exhaust nozzle is also equipped with an oil baffle 205, which is located at the bottom of the exhaust nozzle 204. The oil baffle 205 restricts the flow direction of the oil exhaust gas, directing it towards the air intake of the carburetor 4 and preventing oil exhaust gas from flowing out of the air filter 2 and polluting the environment.

[0031] In this embodiment, an exhaust gas connector 203 is also included, which is connected between the exhaust gas pipe 3 and the exhaust gas nozzle 204. As shown in the figure, the exhaust gas connector 203 is connected between the exhaust gas pipe 3 and the exhaust gas nozzle 204, and the oil exhaust gas generated by the engine 1 is transported to the exhaust gas nozzle 204 of the air filter 2 through the exhaust gas pipe 3, and mixed with air before re-entering the engine 1 for combustion.

[0032] A marine engine is provided, wherein the marine engine is equipped with an air filter assembly as described above, which transports the oil exhaust gas generated by the engine 1 to the air filter 2 through a pipeline, mixes it with air, and then re-enters the engine 1 for combustion. While ensuring the intake air volume and normal operation of the engine 1, it can effectively improve the pressure environment inside the engine 1 housing and re-burn the generated oil exhaust gas, effectively reducing environmental pollution and improving the working efficiency of the engine 1.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An air filter assembly, characterized in that: The system includes an air filter and an exhaust pipe connected to the engine housing for collecting oil exhaust gas. The air filter includes a housing and an exhaust nozzle disposed within the housing. The housing has a gas outlet. The exhaust pipe delivers oil exhaust gas from the engine housing to the exhaust nozzle. The exhaust nozzle introduces the oil exhaust gas into the internal space of the housing and mixes it with air. The mixed gas enters the engine combustion chamber for combustion through the gas outlet.

2. The air filter assembly according to claim 1, characterized in that: The air filter is detachably and fixedly installed in the engine's carburetor.

3. The air filter assembly according to claim 2, characterized in that: The gas outlet is connected to the carburetor's air intake.

4. The air filter assembly according to claim 3, characterized in that: The gas outlet of the housing is connected to the air intake of the carburetor by a clamp.

5. The air filter assembly according to claim 4, characterized in that: The flow area inside the housing is larger than the flow area of ​​the carburetor's air intake.

6. The air filter assembly according to claim 5, characterized in that: The housing is provided with an air inlet, which is detachably covered with a dust cover and faces downwards.

7. The air filter assembly according to claim 3, characterized in that: The bottom of the exhaust nozzle is provided with an oil baffle plate for forming an exhaust port, which faces the air intake of the carburetor and is close to the choke.

8. The air filter assembly according to claim 1, characterized in that: It also includes an exhaust gas connector, which connects the exhaust gas pipe and the exhaust gas nozzle.

9. A marine engine, characterized in that: The marine engine is equipped with an air filter assembly as described in any one of claims 1-8.

Images