CN216142827U

CN216142827U - Equivalent combustion engine air flue structure

Info

Publication number: CN216142827U
Application number: CN202121907989.6U
Authority: CN
Inventors: 李旺
Original assignee: Sichuan Zhongneng Xikong Low Carbon Power Equipment Co ltd
Current assignee: Sichuan Zhongneng Xikong Low Carbon Power Equipment Co ltd
Priority date: 2021-08-16
Filing date: 2021-08-16
Publication date: 2022-03-29
Anticipated expiration: 2031-08-16

Abstract

The utility model discloses an equivalent combustion engine air passage structure, and relates to the technical field of gas engines. The equivalent combustion engine air flue structure comprises a cylinder cover, wherein an air inlet manifold is fixedly connected to one side of the cylinder cover, an intercooling rear pipeline is fixedly connected to one end of the air inlet manifold, a supercharging rear pipeline is fixedly connected to one end of the intercooling rear pipeline through an intercooler, an air-gas mixer is fixedly connected to one end of the supercharging rear pipeline, an air inlet pipe and a gas inlet pipe are respectively connected to the outer wall of the air-gas mixer, a pre-combustion chamber is arranged inside the cylinder cover, and the pre-combustion chamber is connected to the intercooling rear pipeline through a pre-combustion chamber gas pipeline. According to the utility model, the gas and the air are mixed by the air-gas mixer, so that the gas in the precombustion chamber is easier to ignite, the combustion speed in the cylinder is increased to a certain extent, and the problems of high heat efficiency and high oil consumption of the engine are solved.

Description

Equivalent combustion engine air flue structure

Technical Field

The utility model relates to the technical field of gas engines, in particular to an equivalent combustion engine air passage structure.

Background

At present, in order to meet the requirements of the emissions regulations of the United states EPA and the increasingly strict emissions regulations, automobile manufacturers generally adopt a technical route of equivalent plus EGR for engine manufacturing to solve the problem of engine emissions.

Compared with the national five lean combustion, the technical route has the advantages that due to the fact that the in-cylinder combustion speed is low, the thermal efficiency of the engine is low, the thermal load is high, the oil consumption of the feedback engine is high generally in the market, and the phenomena of unstable combustion, easy fire catching and the like of the engine are caused after the EGR rate of the engine is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an equivalent combustion engine air passage structure to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: an equivalent combustion engine air flue structure comprises a cylinder cover, wherein one side of the cylinder cover is fixedly connected with an air inlet manifold, one end of the air inlet manifold is fixedly connected with an intercooling rear pipeline, one end of the intercooling rear pipeline is fixedly connected with a supercharging rear pipeline through an intercooler, one end of the supercharging rear pipeline is fixedly connected with an air gas mixer, the outer wall of the air gas mixer is respectively connected with an air inlet pipe and a gas inlet pipe, a precombustion chamber is arranged in the cylinder cover and is connected with the intercooling rear pipeline through a precombustion chamber gas pipeline, and a filter, an electric compressor and a voltage stabilizer are sequentially installed on the outer wall of the intercooling rear pipeline.

Preferably, an EGR mixer and an electronic throttle valve are connected to the outer wall of the intake manifold in sequence.

Preferably, a spark plug is arranged in the precombustion chamber, and a precombustion chamber switch one-way valve is fixedly mounted at one end of the precombustion chamber gas pipeline close to the precombustion chamber.

Preferably, the other side of the cylinder cover is fixedly connected with an exhaust pipe, and the tail end of the exhaust pipe is fixedly connected with an exhaust tail pipe.

Preferably, an EGR metering unit and an EGR cooler are connected in this order between the exhaust pipe and the EGR mixer.

Preferably, an oxygen sensor is fixedly installed inside the tail pipe.

Preferably, a gas supply metering valve is fixedly connected to the outer wall of the gas inlet pipe.

Compared with the prior art, the utility model has the beneficial effects that:

(1) this kind of equivalent combustion engine air flue structure mixes gas and air through the air gas blender that sets up, and this kind of way makes the inside gas of precombustion chamber ignited more easily, improves the in-cylinder combustion speed to a certain extent, improves the problem that engine thermal efficiency and oil consumption are high.

(2) This kind of equivalent combustion engine air flue structure, through electronic compressor, stabiliser and precombustion chamber switch check valve, make the gas flow who gets into the precombustion chamber stable controllable, increased gas pressure behind electronic compressor and stabiliser, compare in the check valve who gets into the precombustion chamber by inhaling negative pressure certainly and compare, it is more to get into the gas quantity, scavenging is more abundant, because the gas after using the air gas mixer to mix comes the inside waste gas of discharge precombustion chamber, so do not have the gas too thick and the problem that leads to the unable ignition of spark plug with thin, and then the EGR rate that promotes EGR mixer department can not influence the inside ignition of precombustion chamber yet, it promotes the back and causes the engine combustion unstability to have improved engine EGR rate to a certain extent, the phenomenon of catching fire easily takes place.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

In the figure: 1. a filter; 2. an electric compressor; 3. a voltage regulator; 4. a precombustion chamber; 5. a spark plug; 6. a one-way valve for switching the prechamber; 7. a pre-chamber gas conduit; 8. an EGR mixer; 9. an intake manifold; 10. an EGR metering supply unit; 11. an exhaust pipe; 12. an EGR cooler; 13. a gas supply metering valve; 14. an air-gas mixer; 15. a pressurized pipeline; 16. an oxygen sensor; 17. an intercooler; 18. a tail pipe; 19. a pipeline after intercooling; 20. an electronic throttle valve; 21. a cylinder head.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that in the description of the present invention, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific orientation, be configured in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Further, it will be appreciated that the dimensions of the various elements shown in the figures are not drawn to scale, for ease of description, and that the thickness or width of some layers may be exaggerated relative to other layers, for example.

It should be noted that like reference numerals and letters refer to like items in the following figures, and thus, once an item is defined or illustrated in one figure, it will not need to be further discussed or illustrated in detail in the description of the following figure.

As shown in fig. 1, the present invention provides a technical solution: an air flue structure of an equivalent combustion engine comprises a cylinder cover 21, wherein one side of the cylinder cover 21 is fixedly connected with an air inlet manifold 9, the air inlet manifold 9 refers to an air inlet pipeline from the rear of a carburetor or a throttle body to the front of an air inlet channel of the cylinder cover, the air inlet manifold is used for distributing air and fuel oil mixed gas to the air inlet channels of all cylinders through the carburetor or the throttle body, one end of the air inlet manifold 9 is fixedly connected with an intercooling rear pipeline 19, one end of the intercooling rear pipeline 19 is fixedly connected with a supercharging rear pipeline 15 through an intercooler 17, the intercooler 17 is used for reducing the temperature of the supercharged high-temperature air so as to reduce the heat load of the engine and improve the air inflow and further increase the power of the engine, one end of the supercharging rear pipeline 15 is fixedly connected with an air-gas mixer 14, the outer wall of the air-gas mixer 14 is respectively connected with an air inlet pipe and a gas inlet pipe, and the gas are mixed in the air-gas mixer 14, the cylinder cover 21 is internally provided with the precombustion chamber 4, the precombustion chamber 4 is connected to the intercooling rear pipeline 19 through the precombustion chamber gas pipeline 7, the outer wall of the intercooling rear pipeline 19 is sequentially provided with the filter 1, the electric compressor 2 and the voltage stabilizer 3, the filter 1 can effectively filter impurities such as dust and the like in gas mixed by the air-gas mixer 14, the purity of gas reaching the precombustion chamber 4 is ensured, the gas pressure can be increased through the electric compressor 2 and the voltage stabilizer 3, compared with a one-way valve which enters the precombustion chamber 4 by means of self-suction negative pressure, the gas entering amount is more in the mode, and the scavenging is more sufficient.

It should be noted that, an EGR mixer 8 and an electronic throttle valve 20 are connected in sequence to the outer wall of the intake manifold 9, EGR is a short term for exhaust gas recirculation, which is to return part of exhaust gas exhausted by the engine to the intake manifold 9, and the exhaust gas enters the cylinder again together with fresh mixture, because the exhaust gas contains a large amount of polyatomic gas such as CO2, etc., the exhaust gas can not burn but absorbs a large amount of heat due to its high specific heat capacity, so that the maximum combustion temperature of the mixture in the cylinder is reduced, thereby reducing the generation of NOx, the gas mixed by the air-gas mixer 14 passes through the electronic throttle valve 20, is mixed with cooled metered EGR at the EGR mixer 8, and finally enters the engine cylinder for combustion, wherein a spark plug 5 is arranged in the prechamber 4, a prechamber gas conduit 7 near one end of the prechamber 4 is fixedly provided with a prechamber switch check valve 6, the mixed gas in the gas pipeline 7 of the precombustion chamber passes through the filter 1, the electric compressor 2 and the voltage stabilizer 3, then passes through the one-way valve 6 of the precombustion chamber switch, enters the precombustion chamber 4 and is ignited by the spark plug 4 at a proper time.

It should be noted that the other side of the cylinder head 21 is fixedly connected with an exhaust pipe 11, the tail end of the exhaust pipe 11 is fixedly connected with a tail pipe 18, an EGR metering and supplying unit 10 and an EGR cooler 12 are sequentially connected between the exhaust pipe 11 and the EGR mixer 8, exhaust gas in the exhaust pipe 11 is cooled by the EGR cooler 12, the EGR metering and supplying unit 10 can control the gas release amount, an oxygen sensor 16 is fixedly installed in the tail pipe 18, the oxygen sensor 16 is mainly used for detecting the concentration of oxygen in the exhaust gas and sending a feedback signal to an automotive electronic control unit, then the automotive electronic control unit controls the fuel injection amount of a fuel injector so as to control the air-fuel ratio of the mixture to be close to a theoretical value, a fuel gas supply metering valve 13 is fixedly connected to the outer wall of the fuel gas inlet pipe, and the content of fuel gas entering the air-fuel gas mixer 14 can be effectively controlled by the fuel gas supply metering valve 13, in proportion to the amount of air introduced.

The gas is mixed with the air from the air gas mixer 14, and the mixed gas is divided into two paths after passing through the intercooler 17: one path passes through the electronic throttle valve 20, is mixed with the cooled and metered EGR at the EGR mixer 8 and finally enters an engine cylinder for combustion, while the other path passes through the filter 1, the electric compressor 2 and the voltage stabilizer 3, the gas pressure is increased, the content entering the pre-combustion chamber 4 is increased through the pre-combustion chamber switch one-way valve 6, and the entering gas is ignited by the spark plug 4 at a proper time.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An equivalent combustion engine air flue structure comprises a cylinder cover (21), wherein an air intake manifold (9) is fixedly connected to one side of the cylinder cover (21), an intercooling rear pipeline (19) is fixedly connected to one end of the air intake manifold (9), and the equivalent combustion engine air flue structure is characterized in that: one end of the intercooling rear pipeline (19) is fixedly connected with a supercharging rear pipeline (15) through an intercooler (17), one end of the supercharging rear pipeline (15) is fixedly connected with an air-gas mixer (14), the outer wall of the air-gas mixer (14) is respectively connected with an air inlet pipe and a gas inlet pipe, a pre-combustion chamber (4) is arranged inside the cylinder cover (21), the pre-combustion chamber (4) is connected to the intercooling rear pipeline (19) through a pre-combustion chamber gas pipeline (7), and a filter (1), an electric compressor (2) and a voltage stabilizer (3) are sequentially mounted on the outer wall of the intercooling rear pipeline (19).

2. An equivalent combustion engine air passage structure according to claim 1, wherein: and the outer wall of the intake manifold (9) is sequentially connected with an EGR mixer (8) and an electronic throttle valve (20).

3. An equivalent combustion engine air passage structure according to claim 1, wherein: the ignition device is characterized in that a spark plug (5) is arranged in the pre-combustion chamber (4), and a pre-combustion chamber switch one-way valve (6) is fixedly installed at one end, close to the pre-combustion chamber (4), of a pre-combustion chamber gas pipeline (7).

4. An equivalent combustion engine air passage structure according to claim 1, wherein: the other side of the cylinder cover (21) is fixedly connected with an exhaust pipe (11), and the tail end of the exhaust pipe (11) is fixedly connected with an exhaust tail pipe (18).

5. An equivalent combustion engine air passage structure according to claim 4, wherein: an EGR metering supply unit (10) and an EGR cooler (12) are sequentially connected between the exhaust pipe (11) and the EGR mixer (8).

6. An equivalent combustion engine air passage structure according to claim 4, wherein: and an oxygen sensor (16) is fixedly arranged in the tail pipe (18).

7. An equivalent combustion engine air passage structure according to claim 1, wherein: and the outer wall of the gas inlet pipe is fixedly connected with a gas supply metering valve (13).