CN218862739U

CN218862739U - Supercharger assembly and engine

Info

Publication number: CN218862739U
Application number: CN202222937592.2U
Authority: CN
Inventors: 马学文; 黄振霞; 肖茹洁; 白丁; 张振培
Original assignee: SAIC GM Wuling Automobile Co Ltd; Liuzhou Saike Technology Development Co Ltd
Current assignee: SAIC GM Wuling Automobile Co Ltd; Liuzhou Saike Technology Development Co Ltd
Priority date: 2022-11-04
Filing date: 2022-11-04
Publication date: 2023-04-14
Anticipated expiration: 2032-11-04

Abstract

The application relates to the technical field of engines, in particular to a supercharger assembly and an engine, wherein the supercharger assembly comprises: the supercharger comprises an air inlet channel and an air outlet channel; the connecting piece is connected with the air inlet channel and is provided with a mixing cavity; the connecting piece is provided with an EGR (exhaust gas recirculation) air inlet, and the mixing cavity is communicated with the EGR air inlet and the air inlet channel; and the mixing valve is arranged at the end part of the connecting piece and is used for controlling the air inflow of the air entering the mixing cavity. According to the supercharger assembly, the connecting piece is arranged at the air inlet channel, and the mixing valve and the EGR air inlet are integrated on the connecting piece, so that the space arrangement of the supercharger assembly is compact, the use of other connecting parts is reduced, and the weight of an engine is reduced; meanwhile, compared with the arrangement that the EGR air inlet is arranged on the air filter pipeline, the use of high-temperature resistant materials is reduced, and the production cost is reduced; and, EGR air inlet and mixing valve arrangement distance are short, and high temperature circulation waste gas can mix with the air entering mixing chamber after, convenient more accurate control EGR rate.

Description

Supercharger assembly and engine

[ technical field ] A method for producing a semiconductor device

The application relates to the technical field of engines, in particular to a supercharger assembly and an engine.

[ background ] A method for producing a semiconductor device

The supercharger assembly is one of important parts of a supercharged engine, and can compress fresh air and/or circulating exhaust gas by using a part of exhaust gas discharged by the engine to improve the air intake of a cylinder so as to improve the output power of the engine; the supercharger assembly comprises a turbine and an impeller which are coaxially arranged, waste gas exhausted from the engine pushes the turbine to rotate, so that a coaxial pressing wheel is driven to rotate, the pressing wheel compresses fresh air, and the purpose of increasing air inlet pressure to improve air inlet amount is achieved.

In order to control the EGR rate (the ratio of the circulating exhaust gas to the fresh air) in the intake process of the fresh air so as to reduce the oil consumption of the engine and the discharge amount of pollutants, the engine also comprises a mixing valve, and the mixing valve can control the intake amount of the fresh air so as to control the EGR rate.

However, in the existing engine, the supercharger and the mixing valve are separately arranged and connected through pipelines such as an air filter pipe and the like, and the internal space of the engine occupies a large space; an air outlet of the EGR system is formed in the air filter pipe, and the air filter pipe is made of high-temperature-resistant materials due to high temperature of circulating waste gas, so that the preparation cost is high; in addition, as the pipeline of the air filter pipe is long, the circulating exhaust gas and the fresh air cannot be mixed in time and then enter the supercharger, so that the circulating exhaust gas, the fresh air and the mixed gas exist in the air filter pipe, and the EGR rate is controlled inaccurately.

[ Utility model ] content

In view of this, the present application provides a supercharger assembly and an engine, in which a connecting member is disposed at an end of a supercharger, and a distance between an EGR inlet and a mixing valve is shortened on the connecting member, so as to reduce a space occupancy rate of the supercharger assembly, mix circulating exhaust gas and fresh air in time, and precisely control an EGR rate.

In a first aspect, the present application provides a supercharger assembly comprising:

the supercharger comprises an air inlet channel and an air outlet channel;

the connecting piece is connected with the air inlet channel of the supercharger, and a mixing cavity is arranged inside the connecting piece; an EGR (exhaust gas recirculation) air inlet is formed in the wall surface of the connecting piece, and the mixing cavity is communicated with the EGR air inlet and the air inlet channel; and

and the mixing valve is arranged at the end part of the supercharger, the mixing valve is used for controlling air to enter the air inflow of the mixing cavity, and the air and the waste gas entering from the EGR air inlet form mixed gas to enter the supercharger.

In some embodiments, the connector has a length of 50mm to 180mm.

In some embodiments, the connector is one of an aluminum alloy connector, a cast iron connector, a plastic connector.

In some embodiments, the connector is integrally formed or flanged with the supercharger.

In some embodiments, the connector comprises a first flange interface and a second flange interface;

the connecting piece is connected with the supercharger through the first flange interface; the connecting piece is connected with the mixing valve through the second flange interface.

In some embodiments, sealing gaskets are disposed between the first flange interface and the booster and between the second flange interface and the mixing valve.

In some embodiments, the connecting piece is further provided with an air outlet, and the air outlet is communicated with the air outlet channel;

and the mixed gas enters the supercharger through the gas inlet channel, is compressed by the supercharger and flows to the gas outlet through the gas outlet channel.

In some embodiments, an EGR differential pressure sensor is provided at the EGR inlet.

In some embodiments, the supercharger assembly further comprises an intake air pressure temperature sensor disposed in an intake passage of the supercharger.

In a second aspect, the present application provides an engine comprising a crank-link mechanism, a valve train, and a fuel supply system, a lubrication system, a cooling system, an ignition system, and a starting system;

the fuel supply system comprises a supercharger assembly according to any one of the first aspect.

After adopting above-mentioned technical scheme, beneficial effect is:

according to the supercharger assembly, the connecting piece is arranged at the air inlet channel of the supercharger, and then the mixing valve and the EGR air inlet are integrated on the connecting piece, so that the space arrangement of the supercharger assembly in the engine is compact, the use of other connecting parts is reduced, the weight of the engine is reduced, and the production cost is also reduced; meanwhile, the EGR air inlet is integrated on the connecting piece, and compared with the conventional arrangement that the EGR air inlet is arranged on the air filtering pipeline, the use of high-temperature resistant materials by the air filtering pipeline can be reduced, and the production cost is further reduced; and moreover, the EGR air inlet, the mixing valve, the mixing cavity and the air inlet channel are communicated, the arrangement distance between the EGR air inlet and the mixing valve is short, high-temperature circulating waste gas enters the mixing cavity from the EGR air inlet, and air can be instantly mixed in the mixing cavity after entering the mixing cavity from the mixing valve, so that the EGR rate of the engine can be controlled more accurately.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of a supercharger assembly provided herein.

Reference numerals:

1-a supercharger; 2-a connector; 21-EGR intake; 3-mixing valve.

[ detailed description ] embodiments

For better understanding of the technical solutions of the present application, the following detailed descriptions of the embodiments of the present application are provided with reference to the accompanying drawings.

It should be understood that the embodiments described are only a few embodiments of the present application, and not all 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 application.

The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely a relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B, may represent: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship.

The supercharger assembly is one of important parts of a supercharged engine, and can compress fresh air and/or circulating exhaust gas by using a part of exhaust gas discharged by the engine to improve the air intake of a cylinder so as to improve the output power of the engine; the supercharger assembly comprises a turbine and an impeller which are coaxially arranged, exhaust gas discharged from the engine pushes the turbine to rotate, so that a coaxial pressing wheel is driven to rotate, the pressing wheel compresses fresh air, and the purpose of increasing air inlet pressure to improve air inlet amount is achieved.

In view of the above, the present application provides a supercharger assembly, and fig. 1 is a schematic structural diagram of the supercharger assembly provided in the present application, and as shown in fig. 1, the supercharger assembly includes:

the supercharger 1 comprises an air inlet channel and an air outlet channel;

the connecting piece 2 is connected with an air inlet channel of the supercharger 1, and a mixing cavity is arranged inside the connecting piece 2; an EGR (exhaust gas recirculation) air inlet 21 is formed in the wall surface of the connecting piece 2, and the mixing cavity is communicated with the EGR air inlet 21 and an air inlet channel; and

and the mixing valve 3 is arranged at the end part of the connecting piece 2 far away from the supercharger 1, the mixing valve 3 is used for controlling the air inflow of air entering the mixing cavity, and the air and the exhaust gas entering from the EGR air inlet 21 form mixed gas to enter the supercharger 1.

In the scheme, the supercharger assembly is provided with the connecting piece 2 at the air inlet channel of the supercharger 1, and then the mixing valve 3 and the EGR air inlet 21 are integrated on the connecting piece 2, so that the space arrangement of the supercharger assembly in the engine is compact, the use of other connecting parts is reduced, the weight of the engine is lightened, and the production cost is also reduced; meanwhile, the EGR gas inlet 21 is integrated on the connecting piece 2, compared with the conventional arrangement that the EGR gas inlet 21 is arranged on the air filtering pipeline, the use of high-temperature resistant materials by the air filtering pipeline can be reduced, and the production cost is further reduced; and, EGR air inlet 21, mixing valve 3, mixing chamber and inlet channel intercommunication, EGR air inlet 21 arranges the distance with mixing valve 3 short, and high temperature circulation waste gas gets into the mixing chamber from EGR air inlet 21, and the air can be at the instantaneous mixing in the mixing chamber after getting into the mixing chamber from mixing valve 3, makes things convenient for the more accurate control EGR rate of engine.

In some embodiments, the engine includes a crank-link mechanism, a valve train mechanism, and a fuel supply system, a lubrication system, a cooling system, an ignition system, and a starting system, which cooperate to complete four piston strokes of the engine's operating cycle, i.e., an intake stroke, a compression stroke, a power stroke, and an exhaust stroke.

An intake stroke: when an intake valve of the cylinder is opened and an exhaust valve is closed, the piston moves from the top dead center to the bottom dead center, the volume of the cylinder above the piston is increased, vacuum degree is generated, and the pressure in the cylinder is reduced to be lower than the intake pressure. Under the action of vacuum suction, gasoline atomized by a carburetor or a gasoline injection device is mixed with compressed fresh air and circulated waste gas to form combustible mixed gas, the combustible mixed gas is sucked into the cylinder through the intake valve, the air intake process is continuously carried out until the piston passes through a bottom dead center, the intake valve is closed, and then the upward piston starts to compress the gas.

Compression stroke: when the intake and exhaust valves are closed, the combustible mixture in the cylinder is compressed and the temperature and pressure of the combustible mixture increases.

Working stroke: when the compression stroke is close to the top dead center, a spark plug arranged above the cylinder cover emits electric sparks to ignite the compressed combustible mixed gas; after the combustible mixed gas is combusted, a large amount of heat is released, the pressure and the temperature of gas in the cylinder are quickly increased, and the high-pressure gas pushes the piston to quickly move to a lower dead point, so that work is applied to the outside through the crank-link mechanism.

Exhaust stroke: at the end of the working stroke, the exhaust valve is opened, high-temperature exhaust gas is rapidly discharged from the cylinder because the pressure in the cylinder is higher than the atmospheric pressure, the piston reaches the top dead center from the bottom dead center, the exhaust gas in the cylinder is forcibly discharged, and the exhaust process is ended when the piston reaches the vicinity of the top dead center.

In the four strokes of engine, booster 1 and exhaust gas recirculation system can further improve the working property of engine, and the booster assembly that this application provided integrates booster 1 with exhaust gas recirculation system's mixing valve 3. Specifically, the method comprises the following steps:

the supercharger 1 is actually an air compressor that increases the intake air amount of the cylinder by compressing fresh air and/or recyclable exhaust gas. The supercharger 1 comprises a turbine, an impeller, a rotor shaft connecting the turbine and the impeller, and a pressure shell, wherein the turbine, the impeller, the rotor shaft connecting the turbine and the impeller, and the pressure shell form a main body part of the supercharger 1, exhaust gas discharged by an exhaust stroke of a cylinder pushes the turbine to rotate by means of inertia impulse force, and the turbine after rotation drives the impeller to rotate through the rotor shaft. At this time, the pressure shell is provided with an air inlet channel and an air outlet channel at the part of the impeller, the air inlet channel is used for introducing the gas to be compressed into the supercharger 1, and the compressed gas is discharged through the air outlet channel.

The gas to be compressed comprises fresh air and recyclable waste gas, and the fresh air and the recyclable waste gas can enter the supercharger 1 to be compressed after being mixed, so that the use amount of the waste gas can be controlled. Therefore, this application sets up connecting piece 2 at the inlet channel end of booster 1, is equipped with the hybrid chamber in the connecting piece 2. The connecting piece 2 is connected with the supercharger 1 in an integrated molding way or in a flange way, namely the connecting piece 2 can be a part of a pressure shell of the supercharger 1, namely the pressure shell is partially extended to form the connecting piece 2 in the process of preparing the pressure shell of the supercharger 1; or the connecting piece 2 is obtained through a stamping process, and then the connecting piece 2 is connected with the pressure shell of the supercharger 1, and the setting method of the connecting piece 2 and the supercharger 1 can be selected according to actual needs, which is not limited herein. Preferably, connecting piece 2 and booster 1 of this application are detachable flange joint, and connecting piece 2 is equipped with first flange interface with the part of inlet channel butt, carries out the block through first flange interface and inlet channel's tip for connecting piece 2 is convenient with the installation and the dismantlement process of booster 1.

An EGR air inlet 21 is formed in the wall surface of the connecting piece 2, the EGR air inlet 21 is communicated with an EGR air inlet pipe and a mixing cavity, and the mixing cavity is communicated with the EGR air inlet 21 and an air inlet channel. It will be appreciated that the recirculated exhaust gas in the EGR intake pipe enters the mixing chamber from the EGR intake port 21 and then enters the intake passage. Meanwhile, in order to control the air inflow of the recyclable exhaust gas, an EGR differential pressure sensor is arranged at the EGR air inlet 21, and the EGR differential pressure sensor can control and measure the air inflow of the recyclable exhaust gas into the mixing chamber.

It should be noted that, because the exhaust waste gas is high temperature in the cylinder, consequently, the connecting piece 2 that this application used is one in aluminum alloy connecting piece 2, cast iron connecting piece 2, the plastics connecting piece 2, adopts the connecting piece 2 of above-mentioned material, can prevent that connecting piece 2 from damaging because of high temperature in the use, guarantees the life of booster assembly.

Further, fresh air is introduced from an end opening of the connection member 2 away from the supercharger 1, and a mixing valve 3 for controlling the intake amount of the fresh air is provided at an end of the connection member 2 away from the supercharger 1. Specifically, the tip that booster 1 was kept away from to connecting piece 2 is equipped with second flange interface, carries out the block through second flange interface and mixing valve 3 for the installation and the dismantlement process of connecting piece 2 and mixing valve 3 are convenient. It can be understood that when air enters, the air inlet quantity of the fresh air entering the mixing cavity can be realized by controlling the opening angle and the opening time of the blades in the mixing valve 3.

It should be noted that, in order to ensure the air tightness of the gas channel formed between the connecting member 2, the EGR gas inlet pipe, the mixing valve 3 and the supercharger 1 and ensure the accurate control of the EGR rate, sealing gaskets are arranged between the first flange interface and the supercharger 1 and between the second flange interface and the mixing valve 3, and the sealing gaskets prevent the gas to be compressed from escaping from the connecting part.

In order to mix the circulated exhaust gas and the fresh air more quickly, the length of the connecting member 2 needs to be controlled to ensure the accuracy of the EGR rate, the length of the connecting member 2 is 50mm to 180mm, and optionally, the length of the connecting member 2 may be specifically 50mm, 60mm, 80mm, 100mm, 120mm, 160mm, 180mm, or the like, or may be other values within a range, and may be selected according to actual needs, which is not limited herein. If the length of the connecting piece 2 is too short, when the EGR air inlet 21 and the mixing valve 3 simultaneously admit air, because the distance between the EGR air inlet 21 and the mixing valve 3 is too small, the circulating waste gas and the fresh air are easy to generate convection, and the gas introduction process is influenced; if the length of connecting piece 2 is overlength, circulated waste gas and fresh air can not in time mix after getting into, lead to having circulated waste gas, fresh air and mist in the inlet channel, lead to EGR rate control inaccuracy.

Furthermore, after the gas to be compressed is compressed in the supercharger 1, the connecting piece 2 is also provided with a gas outlet which is communicated with a gas outlet channel of the supercharger 1. The compressed gas after compression can enter the gas outlet through the gas outlet channel and then is introduced into the gas inlet valve of the cylinder from the gas outlet for combustion.

In the practical application process, the exhaust gas enters a mixing cavity of the connecting piece 2 from the EGR air inlet 21, and the EGR differential pressure sensor measures the air inflow Q1 of the exhaust gas; fresh air enters the mixing cavity through the mixing valve 3, the fresh air and the mixed gas enter the air inlet channel after being mixed into the mixed gas, an air inlet pressure temperature sensor is arranged in the air inlet channel, the air inflow Q of the mixed gas is measured through the air inlet pressure temperature sensor in the air inlet channel, the difference value of Q and Q1 can be calculated at the moment, namely the air inflow Q2 of the fresh air, and the EGR rate is further calculated; and the EGR rate is selected according to actual needs, so that the oil consumption of the engine and the emission of pollutants are reduced.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions described in the foregoing embodiments may be modified or equivalents may be substituted for some or all of the technical features. And the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A supercharger assembly, wherein the supercharger assembly comprises:

the supercharger (1), the supercharger (1) comprises an air inlet channel and an air outlet channel;

the connecting piece (2) is connected with the air inlet channel of the supercharger (1), and a mixing cavity is arranged inside the connecting piece (2); an EGR (exhaust gas recirculation) inlet (21) is formed in the wall surface of the connecting piece (2), and the mixing cavity is communicated with the EGR inlet (21) and the air inlet channel; and

mixing valve (3), set up in connecting piece (2) are kept away from the tip of booster (1), mixing valve (3) are used for the control air admission of mixing chamber, the air with the waste gas that EGR air inlet (21) got into forms the mist and gets into booster (1).

2. Supercharger assembly according to claim 1, characterised in that the connecting piece (2) has a length of 50-180 mm.

3. Supercharger assembly according to claim 1, characterised in that the connection piece (2) is one of an aluminium alloy connection piece (2), a cast iron connection piece (2), a plastic connection piece (2).

4. A supercharger assembly according to any one of claims 1-3, characterised in that the connecting piece (2) is integrally or flange-connected to the supercharger (1).

5. The supercharger assembly according to claim 4, wherein the connection piece (2) comprises a first flange interface and a second flange interface;

the connecting piece (2) is connected with the supercharger (1) through the first flange interface; the connecting piece (2) is connected with the mixing valve (3) through the second flange interface.

6. A supercharger assembly according to claim 5, characterised in that sealing gaskets are provided between the first flange interface and the supercharger (1) and between the second flange interface and the mixing valve (3).

7. The supercharger assembly according to any one of claims 1 to 3, wherein the connecting piece (2) is further provided with an air outlet which is communicated with the air outlet channel;

the mixed gas enters the supercharger (1) through the gas inlet channel, is compressed by the supercharger (1), and then flows to the gas outlet through the gas outlet channel.

8. A supercharger assembly according to any one of claims 1-3, characterised in that an EGR differential pressure sensor is provided at the EGR inlet (21).

9. A supercharger assembly according to any one of claims 1-3, characterised in that the supercharger assembly further comprises an inlet air pressure and temperature sensor arranged in the inlet channel of the supercharger (1).

10. An engine comprising a crank-link mechanism, a valve train mechanism, and a fuel supply system, a lubrication system, a cooling system, an ignition system, and a starting system;

the fuel supply system comprising a supercharger assembly according to any one of claims 1 to 9.