CN217558437U

CN217558437U - EGR mixing arrangement, supercharged engine and automobile body

Info

Publication number: CN217558437U
Application number: CN202220992859.5U
Authority: CN
Inventors: 何佳佳; 陈源源; 罗书力
Original assignee: Chongqing Changan Automobile Co Ltd
Current assignee: Chongqing Changan Automobile Co Ltd
Priority date: 2022-04-27
Filing date: 2022-04-27
Publication date: 2022-10-11
Anticipated expiration: 2032-04-27

Abstract

The utility model relates to a EGR mixing arrangement, supercharged engine and automobile body, EGR mixing arrangement including being responsible for, first auxiliary pipe and second auxiliary pipe all with the body intercommunication of being responsible for, first auxiliary pipe is arranged in getting into the main pipe with the gaseous guide of song tong, the second auxiliary pipe is arranged in getting into the main pipe with the gaseous guide of EGR, first auxiliary pipe is close to for the second auxiliary pipe more the inlet end of being responsible for, first auxiliary pipe for the slope of being responsible for is arranged, first auxiliary pipe and second auxiliary pipe are arranged respectively be responsible for the both sides of radial direction. The utility model discloses simple structure does not have EGR introducing device or similar stirring function's device in the main entrance, and the circulation is smooth and easy.

Description

EGR mixing arrangement, supercharged engine and automobile body

Technical Field

The utility model relates to the technical field of engines, concretely relates to supercharged engine's air intake technology.

Background

The supercharged gasoline engine generally uses an LP-EGR system (low-pressure EGR system) to further improve the thermal efficiency of the engine and reduce the oil consumption. This technique is also commonly used in extended range supercharger engines. Before EGR gas in an LP-EGR system is connected into a gas compressor, the EGR gas is mixed with fresh air and a triton gas and then enters the gas compressor. If the gas is mixed unevenly before entering the impeller of the compressor, the performance of the compressor is reduced, abnormal noise and other failure modes occur, and finally the performance of the engine is poor, the noise of the whole engine exceeds the standard and other problems are caused. Therefore, an EGR mixing device is needed to ensure that the gas in front of the compressor is uniformly mixed.

In order to make the gas mixing more uniform, the conventional EGR mixing device mainly adopts three ways, one of which is to arrange an EGR introduction device in its main passage; the second one consists in arranging means with similar stirring function; and thirdly, arranging a chamber in the circumferential direction of the main channel, and adjusting the size and the position of a plurality of circumferential through holes between the two chambers to realize the purpose of uniform mixing.

The first and second design schemes need to be internally provided with structures in the main channel, the air inlet resistance of the main channel can be increased, the performance of the engine is influenced, and in the working condition of large air inlet flow, abnormal air flow noise can occur when high-speed air flow passes through the introducing or (and) stirring device in the main channel, and the sound quality of the engine is reduced. The third aspect causes the EGR mixing device to become large in circumferential dimension, difficult to arrange, and increases the path of the EGR gas flowing into the main passage, causing an increase in resistance of the EGR system, making it difficult to obtain a high EGR rate to improve the thermal efficiency of the engine.

SUMMERY OF THE UTILITY MODEL

One of the objectives of the present invention is to provide an EGR mixing device to solve the problems of increased gas resistance and difficult arrangement of the existing EGR mixing device; the second purpose is to provide a supercharged engine; the third purpose is to provide an automobile.

In order to realize the purpose, the utility model adopts the technical scheme as follows:

the utility model provides a EGR mixing arrangement, includes and is responsible for, first auxiliary pipe and second auxiliary pipe all with the body intercommunication of being responsible for, first auxiliary pipe is arranged in getting into the person in charge with the guidance of bend gas, the second auxiliary pipe is arranged in getting into the person in charge with the guidance of EGR gas, first auxiliary pipe is closer to for the second auxiliary pipe the inlet end of being responsible for, first auxiliary pipe and second auxiliary pipe homogeneous phase for the person in charge slope is arranged, just first auxiliary pipe and second auxiliary pipe are arranged respectively be responsible for the both sides of radial direction.

According to the technical means, fresh air enters from the air inlet end of the main pipe, most of the air flows along the axial direction of the main pipe, the crank gas enters the main pipe through the first auxiliary pipe, the EGR gas enters the main pipe through the second auxiliary pipe, and the first auxiliary pipe and the second auxiliary pipe are inclined, so that the crank gas can impact on the inner wall surface of the main pipe in a reciprocating manner by adjusting the flow speed of the crank gas, tumble is formed, impact on the inner wall of the main pipe in a reciprocating manner, and further impact on mixed gas of the EGR gas and the air, and the mixing degree of the EGR gas and the mixed gas is more uniform.

Further, the second sub-pipe is arranged obliquely with respect to the main pipe, and when the first gas and the second gas are merged in the main pipe, the flow direction of the component of the crank gas and the EGR gas in the direction perpendicular to the axis direction of the main pipe is opposite, and the flow direction of the component of the crank gas and the EGR gas in the direction parallel to the axis direction of the main pipe is parallel to the direction from the gas inlet end to the gas outlet end of the main pipe.

According to the above technical means, since the first sub-pipe and the second sub-pipe are both arranged obliquely with respect to the main pipe, the two components of the crank gas and the EGR gas in the direction perpendicular to the main pipe axis and in the direction parallel to the main pipe axis are generated, and the component parallel to the main pipe axis coincides with the flow direction of the fresh air, and the generated resistance is small, the component of the EGR gas in the direction perpendicular to the main pipe axis and the component of the crank gas in the main pipe axis are impacted, and the energy of the EGR gas is greatly reduced, and the EGR gas is further merged into the mixed gas of the crank gas, the air and the EGR gas and discharged from the gas outlet end of the main pipe, thereby reducing the resistance when the mixed gas flows.

Further, the inclination angle of the first secondary pipe relative to the main pipe is 70-90 °.

Further, the angle of inclination of the second secondary pipe relative to the primary pipe is 60-90 °.

Furthermore, the air inlet end of the first auxiliary pipe is connected and communicated with a guide pipe.

Further, the pipe diameter of the guide pipe is smaller than that of the first auxiliary pipe.

Further, a first flange is installed at the air inlet end of the main pipe.

Further, the second flange is installed to the end of giving vent to anger of being responsible for.

A supercharged engine comprises the EGR mixing device, wherein the air inlet end of a main pipe of the EGR mixing device is connected and communicated with the EGR mixing valve, and the air outlet end of the main pipe of the EGR mixing device is connected and communicated with a supercharger.

An automobile comprises an automobile body, wherein the automobile body is provided with the supercharged engine.

The utility model has the advantages that:

(1) the method comprises the following steps The utility model has simple structure, no EGR leading-in device or device with similar stirring function in the main channel, smooth circulation and small resistance;

(2) the method comprises the following steps The utility model discloses EGR gas passage direct access main entrance, EGR channel resistance is less, is favorable to realizing great EGR rate

(3) The method comprises the following steps The utility model discloses use the form that the both sides were arranged about the main entrance to the form that the passageway was told to the song with EGR gas passage, strengthen the triton gas in the main entrance, the gaseous mixture of fresh air and EGR realizes the homogeneity target of mist more easily.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view showing the direction of gas flow inside the main pipe, wherein the direction of the arrows is the gas flow direction.

Wherein, 1-main tube; 2-a first secondary pipe; 3-a second secondary pipe; 4-the gas inlet end of the main pipe; 5-the air outlet end of the main pipe; 6, a guide pipe; 7-a first flange; 8-second flange.

Detailed Description

The embodiments of the present invention will be described with reference to the accompanying drawings and preferred embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure in the specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are presented for purposes of illustration only and are not intended to limit the scope of the present disclosure.

It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic manner, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the form, amount and proportion of each component may be changed arbitrarily and the layout of the components may be more complicated.

The present embodiment proposes an EGR mixing device, as shown in fig. 1, which includes a main pipe 1, the main pipe 1 having an air inlet end 4 of the main pipe and an air outlet end 5 of the main pipe, and air enters the interior of the main pipe 1 from the air inlet end 4 of the main pipe. The main pipe 1 is provided with a first secondary pipe 2 and a second secondary pipe 3, both communicating with the main pipe 1 and both arranged obliquely with respect to the main pipe 1, the first secondary pipe 2 being closer to the air intake end 4 of the main pipe than the second secondary pipe 3.

As shown in fig. 2, fresh air is introduced into the main pipe 1 by the air inlet end 4 of the main pipe, the crank gas is introduced into the main pipe 1 by the first sub-pipe 2, and the egr gas is introduced into the main pipe 1 by the second sub-pipe 3.

In the embodiment, in a plurality of operating conditions of the stroke-increasing supercharged engine, the operating conditions with small influence on the efficiency of the supercharger are subjected to subsequent performance check and optimal scheme selection after the crank gas, the EGR gas and the fresh air are mixed. By adjusting the inclination of the first and

second sub pipes

2 and 3 with respect to the main pipe 1, the flow directions of the components of the crank gas and the EGR gas in the direction perpendicular to the axis of the main pipe 1 when they are merged are opposite to each other, and the resistance to the flow of the mixed gas can be reduced.

Fresh air enters from the air inlet end 4 of the main pipe, most of the air flows along the axial direction of the main pipe 1, the crank gas enters the main pipe 1 through the first auxiliary pipe 2, the EGR gas enters the main pipe through the second auxiliary pipe 3, and the first auxiliary pipe 2 and the second auxiliary pipe 3 are inclined, so that the crank gas can impact on the inner wall surface of the main pipe in a reciprocating manner by adjusting the flow speed of the crank gas, tumble flow is formed, mixed gas of the EGR gas and the air can be impacted, and the mixing degree of the EGR gas and the mixed gas is more uniform.

Because the first secondary pipe and the second secondary pipe are obliquely arranged relative to the main pipe, the two components of the bent gas and the EGR gas, which are vertical to the axial direction of the main pipe and parallel to the axial direction of the main pipe 1, are generated, the component parallel to the axial direction of the main pipe 1 is consistent with the flow direction of fresh air, the resistance caused by the small resistance is small, the component of the EGR gas, which is vertical to the axial direction of the main pipe 1, is impacted with the component of the bent gas, which is in the axial direction of the main pipe, the energy of the EGR gas is greatly reduced, the flow direction of the component of the bent gas and the EGR gas, which is parallel to the axial direction of the main pipe 1, is parallel to the direction from the gas inlet end to the gas outlet end of the main pipe, the mixed gas is discharged from the gas outlet end 5 of the main pipe, and the resistance when the mixed gas flows is reduced.

In this embodiment, the first secondary pipe 2 is inclined at an angle of 70-90 ° with respect to the primary pipe 1, and the second secondary pipe 3 is inclined at an angle of 60-90 ° with respect to the primary pipe 1.

In this embodiment, the air inlet end of the first secondary pipe 2 is connected with a guide pipe 6, and the pipe diameter of the guide pipe 6 is smaller than that of the first secondary pipe 2.

In this embodiment, the air inlet end 4 of the main pipe is connected to a first flange 7, and the air outlet end 7 of the main pipe is connected to a second flange 8.

The embodiment also provides a supercharged engine, including above-mentioned EGR mixing arrangement, be responsible for 1 and be connected with EGR mixing valve flange joint and intercommunication through first flange 7, through second flange 8 and booster flange joint and intercommunication.

The embodiment also provides an automobile which comprises an automobile body, wherein the automobile body is provided with the supercharged engine.

The above embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model.

Claims

1. An EGR mixing device, characterized in that: including being responsible for, first auxiliary pipe and second auxiliary pipe all with the body intercommunication of being responsible for, first auxiliary pipe is arranged in getting into the person in charge with the gaseous guide of song tong, the second auxiliary pipe is arranged in getting into the person in charge with the gaseous guide of EGR, first auxiliary pipe is closer to for the second auxiliary pipe the inlet end of being responsible for, first auxiliary pipe for the person in charge slope is arranged, first auxiliary pipe and second auxiliary pipe are arranged respectively be responsible for the both sides of radial direction.

2. The EGR mixing device of claim 1, wherein: the second sub-pipe is arranged obliquely with respect to the main pipe, and when the crank gas and the EGR gas merge in the main pipe, the crank gas and the EGR gas flow in opposite directions with respect to a component perpendicular to the axial direction of the main pipe, and the crank gas and the EGR gas flow in parallel with the direction from the inlet end to the outlet end of the main pipe.

3. The EGR mixing device according to claim 1, characterized in that: the inclination angle of the first secondary pipe relative to the main pipe is 70-90 degrees.

4. The EGR mixing device according to claim 3, characterized in that: the angle of inclination of the second secondary pipe relative to the primary pipe is 60-90 deg..

5. The EGR mixing device according to claim 1, characterized in that: and the air inlet end of the first auxiliary pipe is connected and communicated with a guide pipe.

6. The EGR mixing device of claim 5, wherein: the pipe diameter of the guide pipe is smaller than that of the first auxiliary pipe.

7. The EGR mixing device of claim 1, wherein: a first flange is installed at the air inlet end of the main pipe.

8. The EGR mixing device according to claim 1, characterized in that: and a second flange is arranged at the air outlet end of the main pipe.

9. A supercharged engine, characterized in that: the EGR mixing device comprises the EGR mixing device according to any one of claims 1 to 8, wherein the air inlet end of the main pipe of the EGR mixing device is connected and communicated with the EGR mixing valve, and the air outlet end of the main pipe of the EGR mixing device is connected and communicated with the supercharger.

10. A vehicle body, characterized in that: the vehicle body is provided with a supercharged engine according to claim 9.