Pre-pressurization pipeline of supercharger and engine
By setting up a cyclone cavity in the front pressure pipeline of the supercharger, the problems of gas flow disorder and large pressure drop in the front pressure pipeline of the traditional supercharger are solved, and the pressure drop is reduced and the performance of the internal combustion engine is improved.
Patent Information
- Application Number
- CN202420972592.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-05-07
AI Technical Summary
The traditional supercharger front pressure pipeline has only one outlet for 3 strands of gas, resulting in internal gas flow disorder and a large pressure drop, making it difficult to effectively reduce the pressure drop.
By setting a cyclone chamber in the pre-pressure pipeline of the supercharger, the low-pressure EGR exhaust gas and the gas of the engine respirator are spirally transported to the airflow chamber, reducing the airflow hedging situation and avoiding gas flow disorders.
It realizes the reduction of the pressure drop in the front pressure pipeline of the supercharger, improves the intake efficiency of the low-pressure EGR route internal combustion engine supercharger, and improves the performance of the internal combustion engine.
Smart Images
Figure CN222782725U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of engine air intake systems, in particular to a pre-compression pipeline of a supercharger and an engine. Background Art
[0002] The supercharger pre-pressure pipeline is used to transport EGR exhaust gas, respirator exhaust gas and air filtered gas to the supercharger.
[0003] like Figure 1 and Figure 2 As shown, one end of the airflow chamber 06 of the main pipeline 05 of the conventional supercharger pre-compression pipeline 07 is used as the first inlet 01 for accessing the gas after the air filter, and the other end is used as the outlet 02 for accessing the supercharger. The main pipeline 05 is provided with an EGR exhaust gas intake pipe 04 and a respirator exhaust gas intake pipe 03. The intake end of the EGR exhaust gas intake pipe 04 is used to access the low-pressure EGR exhaust gas, and the intake end of the respirator exhaust gas intake pipe 03 is used to access the engine respirator. During operation, the three streams of gas meet in the airflow chamber 06 of the main pipeline 05 and flow out from the outlet connected to the supercharger into the supercharger pressure end.
[0004] like Figure 3 As shown, during the specific assembly, the first inlet 01 of the supercharger pre-pressure pipeline 07 is connected to the air filter rear intake pipe 08, the EGR exhaust gas intake pipe 04 is connected to the low-pressure EGR module 012, the respirator exhaust gas intake pipe 03 is connected to the respirator outlet 010 of the respirator, and the outlet 02 of the main pipeline 05 is connected to the supercharger 09.
[0005] Since there are three gas streams flowing into the supercharger pre-compression pipeline and there is only one outlet, the outlets of the EGR exhaust gas intake pipe 04 and the respirator exhaust gas intake pipe 03 are directly opposite, resulting in gas collision in the supercharger pre-compression pipeline, disordered gas flow inside the supercharger pre-compression pipeline, and large pressure drop.
[0006] Therefore, how to reduce the pressure drop of the pre-pressure pipeline of the supercharger is a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content
[0007] The purpose of the utility model is to provide a supercharger pre-pressure pipeline, the pressure drop of the supercharger pre-pressure pipeline is reduced. Another purpose of the utility model is to provide an engine including the supercharger pre-pressure pipeline.
[0008] The present application provides a supercharger pre-pressure pipeline, comprising:
[0009] A main pipeline, wherein one end of the air flow chamber of the main pipeline is used as a first inlet for receiving the air after the air filter, and the other end is used as an outlet for receiving the supercharger;
[0010] An EGR exhaust gas intake pipe, wherein an intake end of the EGR exhaust gas intake pipe is used to receive low-pressure EGR exhaust gas;
[0011] A respirator exhaust gas inlet pipe, wherein the inlet end of the respirator exhaust gas inlet pipe is used to connect to the engine respirator;
[0012] A swirl chamber, the air outlet of the swirl chamber is connected to the airflow chamber, the air outlet of the EGR exhaust gas inlet pipe and the air outlet of the respirator exhaust gas inlet pipe are both connected to the swirl chamber, and a spiral flow path is formed in the swirl chamber to spirally transport the low-pressure EGR exhaust gas and the gas of the engine respirator to the airflow chamber.
[0013] Optionally, in the above-mentioned supercharger pre-compression pipeline, it also includes an external pipe installed on the outside of the main pipe, the swirl chamber is formed between the inner wall of the external pipe and the outer wall of the main pipe, the air outlet of the swirl chamber is opened on the outer wall of the main pipe, and the EGR exhaust gas intake pipe and the respirator exhaust gas intake pipe are connected to the external pipe.
[0014] Optionally, in the above-mentioned supercharger pre-compression pipeline, the external pipe and the main pipeline are integrally formed.
[0015] Optionally, in the above-mentioned supercharger pre-compression pipeline, the EGR exhaust gas intake pipe and the respirator exhaust gas intake pipe are integrally formed with the main pipeline.
[0016] Optionally, in the above-mentioned supercharger pre-pressure pipeline, along the gas flow direction in the swirl chamber, the outlet of the EGR exhaust gas inlet pipe is located upstream of the outlet of the respirator exhaust gas inlet pipe.
[0017] Optionally, in the above-mentioned pre-pressure pipeline of the supercharger, a preset mixing cavity is formed between the outlet of the exhaust gas inlet pipe of the respirator and the outlet of the cyclone cavity in the cyclone cavity.
[0018] Optionally, in the above-mentioned pre-pressure pipeline of the supercharger, the cross-sectional area of the swirl chamber gradually increases along the direction perpendicular to the gas flow direction.
[0019] Optionally, in the above-mentioned supercharger pre-pressure pipeline, a first angle between the tangent of the center line of the swirl chamber and the center line of the EGR exhaust gas intake pipe in the gas flow direction and a second angle between the tangent of the center line of the swirl chamber and the center line of the respirator exhaust gas intake pipe in the gas flow direction are both obtuse angles.
[0020] Optionally, in the above-mentioned supercharger pre-pressure pipeline, the intersection of the center line of the EGR exhaust gas intake pipe and the center line of the swirl chamber is located in the area of 10%-20% of the center line of the swirl chamber, the intersection of the center line of the respirator exhaust gas intake pipe and the center line of the swirl chamber is located in the area of 40%-60% of the center line of the swirl chamber, and the center line of the swirl chamber takes the outlet position of the swirl chamber as 100% of the area.
[0021] An engine comprises a supercharger and a supercharger pre-pressure pipeline connected to the supercharger, wherein the supercharger pre-pressure pipeline is the supercharger pre-pressure pipeline described in any one of the above items.
[0022] In the above technical scheme, the pre-compression pipeline of the supercharger provided by the utility model includes a main pipeline, an EGR exhaust gas intake pipe, a respirator exhaust gas intake pipe and a swirl chamber. One end of the airflow chamber of the main pipeline serves as the first inlet for accessing the gas after the air filter, and the other end serves as the outlet for accessing the supercharger. The air inlet end of the EGR exhaust gas intake pipe is used to access the low-pressure EGR exhaust gas. The air inlet end of the respirator exhaust gas intake pipe is used to access the engine respirator. The air outlet of the swirl chamber is connected to the airflow chamber, and the air outlet of the EGR exhaust gas intake pipe and the air outlet of the respirator exhaust gas intake pipe are both connected to the swirl chamber, and a spiral flow path is formed in the swirl chamber to spirally transport the low-pressure EGR exhaust gas and the gas of the engine respirator to the airflow chamber. When the pre-compression pipeline of the supercharger is working, the air inlet end of the EGR exhaust gas intake pipe is connected to the low-pressure EGR exhaust gas. The air inlet end of the exhaust gas inlet pipe of the respirator is connected to the engine respirator, the first inlet of the air flow chamber of the main line is connected to the air after the air filter, and the outlet of the air flow chamber of the main line is connected to the supercharger
[0023] From the above description, it can be seen that in the supercharger pre-pressure pipeline provided in the present application, a swirl chamber is provided so that the low-pressure EGR exhaust gas and the gas of the engine breather are spirally transported to the airflow chamber, thereby reducing the airflow collision in the main pipeline and avoiding the turbulence of the gas flow in the supercharger pre-pressure pipeline. Therefore, the pressure drop in the supercharger pre-pressure pipeline is reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.
[0025] Figure 1 It is a schematic diagram of the gas flow direction of the pre-pressure pipeline of a traditional supercharger;
[0026] Figure 2 It is a cross-sectional view of the pre-pressure pipeline of a conventional supercharger;
[0027] Figure 3 This is a schematic diagram of the installation position of the conventional supercharger pre-compression pipeline;
[0028] Figure 4 A three-dimensional structural diagram of the pre-pressure pipeline of the supercharger provided in an embodiment of the utility model;
[0029] Figure 5A schematic diagram of the airflow of the pre-compression pipeline of the supercharger provided by an embodiment of the utility model;
[0030] Figure 6 A schematic diagram of the intersection of the center line of the EGR exhaust gas intake pipe and the center line of the swirl chamber in the cross-sectional view of the supercharger before pressure pipeline provided by an embodiment of the utility model and the intersection of the center line of the respirator exhaust gas intake pipe and the center line of the swirl chamber;
[0031] Figure 7 This is a schematic diagram of the first angle and the second angle in the cross-sectional view of the supercharger pre-compression pipeline provided by an embodiment of the utility model.
[0032] in Figure 1-7 middle:
[0033] 01-first inlet, 02-outlet, 03-exhaust gas intake pipe of respirator, 04-EGR exhaust gas intake pipe, 05-main pipeline, 06-airflow chamber, 07-supercharger pre-pressure pipeline, 08-air filter rear intake pipe, 09-supercharger, 010-exhaust gas outlet, 011-engine cylinder head cover, 012-low-pressure EGR module;
[0034] 1-first inlet, 2-outlet, 3-respirator exhaust gas intake pipe, 301-center line of the respirator exhaust gas intake pipe, 4-EGR exhaust gas intake pipe, 401-center line of the EGR exhaust gas intake pipe, 5-main line, 6-airflow chamber, 7-external pipe, 8-swirl chamber, 801-center line of the swirl chamber. DETAILED DESCRIPTION
[0035] The core of the utility model is to provide a supercharger pre-pressure pipeline, the pressure drop of the supercharger pre-pressure pipeline is reduced. Another core of the utility model is to provide an engine including the supercharger pre-pressure pipeline.
[0036] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and implementation methods.
[0037] Please refer to Figures 4 to 7 .
[0038] In a specific embodiment, the supercharger pre-compression pipeline provided by the specific embodiment of the utility model includes a main line 5, an EGR exhaust gas intake pipe 4, a respirator exhaust gas intake pipe 3 and a swirl chamber 8. One end of the airflow chamber 6 of the main line 5 is used as a first inlet 1 for accessing the air filtered gas, and the other end is used as an outlet 2 for accessing the supercharger. Specifically, the air filtered gas enters the airflow chamber 6 through the first inlet 1. The outlet 2 of the main line 5 is connected to the supercharger.
[0039] The intake end of the EGR exhaust gas intake pipe 4 is used to receive the low-pressure EGR exhaust gas. The intake end of the respirator exhaust gas intake pipe 3 is used to receive the engine respirator. Specifically, the diameters of the EGR exhaust gas intake pipe 4 and the respirator exhaust gas intake pipe 3 are determined according to actual needs.
[0040] The air outlet of the swirl chamber 8 is connected to the airflow chamber 6, and the air outlet of the EGR exhaust gas intake pipe 4 and the air outlet of the respirator exhaust gas intake pipe 3 are both connected to the swirl chamber 8, that is, the EGR exhaust gas intake pipe 4 conveys the EGR exhaust gas to the swirl chamber 8, and the respirator exhaust gas intake pipe 3 conveys the respirator exhaust gas to the swirl chamber 8. A spiral flow path is formed in the swirl chamber 8 to spirally convey the low-pressure EGR exhaust gas and the gas of the engine respirator to the airflow chamber 6. Specifically, the low-pressure EGR exhaust gas and the gas of the respirator swirl into the airflow chamber 6.
[0041] Specifically, the air outlet of the swirl chamber 8 is close to the outlet 2 of the main pipeline 5. That is, the swirl chamber 8 is not perpendicular to the plane of the main pipeline 5, that is, compared with the air inlet of the swirl chamber 8 connected to the EGR exhaust gas intake pipe 4 and the respirator exhaust gas intake pipe 3, the air outlet of the swirl chamber 8 is closer to the pipeline outlet, so that the gas in the EGR exhaust gas intake pipe 4 and the respirator exhaust gas intake pipe 3 can be spirally inhaled.
[0042] During specific assembly, the EGR exhaust gas intake pipe 4 and the respirator exhaust gas intake pipe 3 are connected to the outer wall of the swirl chamber 8 .
[0043] When the supercharger pre-compression pipeline is working, the intake end of the EGR exhaust gas intake pipe 4 is connected to the low-pressure EGR exhaust gas. The intake end of the respirator exhaust gas intake pipe 3 is connected to the engine respirator, the first inlet 1 of the air flow chamber 6 of the main line 5 is connected to the air after the air filter, and the outlet of the air flow chamber 6 of the main line 5 is connected to the supercharger.
[0044] The low-pressure EGR exhaust gas and the gas of the respirator of the present application enter the airflow chamber 6 in a swirl flow, that is, the airflow direction of the two gases is changed through the swirl chamber 8, and a tangential air intake is achieved in a spiral air intake manner. The low-pressure EGR gas and the gas of the respirator of the present application are both designed for flow guidance, which can effectively reduce the pressure drop of the pipeline before the supercharger pressure, improve the air intake efficiency of the low-pressure EGR route internal combustion engine supercharger, and improve the performance of the internal combustion engine.
[0045] Specifically, the outlet position of the EGR exhaust gas intake pipe 4 and the outlet position of the respirator exhaust gas intake pipe 3 are separated and arranged. Specifically, both of them can enter the airflow chamber 6 along their respective spiral paths.
[0046] In a specific implementation, the swirl chamber 8 can be designed in the airflow chamber 6 .
[0047] In another specific embodiment, the pre-compression pipeline of the supercharger provided in the present application further includes an external pipe 7 sleeved on the outside of the main pipe 5. In order to improve assembly efficiency and sealing performance, preferably, the external pipe 7 and the main pipe 5 are integrally processed and formed.
[0048] A swirl chamber 8 is formed between the inner wall of the external pipe 7 and the outer wall of the main pipe 5 , and an air outlet of the swirl chamber 8 is opened on the outer wall of the main pipe 5 . The EGR exhaust gas intake pipe 4 and the respirator exhaust gas intake pipe 3 are connected to the external pipe 7 .
[0049] In order to improve assembly efficiency and sealing performance, it is preferred that the EGR exhaust gas intake pipe 4 and the respirator exhaust gas intake pipe 3 are integrally formed with the main pipe 5 .
[0050] Preferably, the supercharger pre-compression pipeline is integrally processed and formed to further improve the overall sealing performance.
[0051] Considering that the flow rate and pressure of low-pressure EGR exhaust gas are much greater than the flow rate and pressure of respirator exhaust gas, along the gas flow direction in the swirl chamber 8, the outlet of the EGR exhaust gas inlet pipe 4 is located upstream of the outlet of the respirator exhaust gas inlet pipe 3. The outlet of the EGR exhaust gas inlet pipe 4 is upstream, that is, the EGR exhaust gas is upstream and first enters the swirl chamber 8, and the outlet of the respirator exhaust gas inlet pipe 3 is downstream. Inside the swirl chamber 8, the EGR exhaust gas and the respirator exhaust gas intake direction are in the downstream direction, so the EGR exhaust gas will not hinder the respirator exhaust gas.
[0052] In order to improve the uniformity of gas mixing, preferably, a preset mixing cavity is formed between the outlet of the respirator exhaust gas inlet pipe 3 and the outlet of the cyclone cavity 8. Specifically, the outlet of the cyclone cavity 8 is arranged downstream of the respirator exhaust gas outlet and at a certain distance.
[0053] The arc length formed by the intersection of the center line 401 of the EGR exhaust gas intake pipe and the center line 801 of the swirl chamber and the intersection of the center line 301 of the respirator exhaust gas intake pipe and the center line 801 of the swirl chamber is less than the semicircle length of the center line of the swirl chamber 8. Figure 6As shown, the intersection of the center line 401 of the EGR exhaust gas intake pipe and the center line 801 of the swirl chamber is located in the area of 10%-20% of the center line of the swirl chamber 8. Specifically, the intersection of the center line 401 of the EGR exhaust gas intake pipe and the center line 801 of the swirl chamber is located in the area of 12%-18% of the center line of the swirl chamber 8. The intersection of the center line 301 of the respirator exhaust gas intake pipe and the center line 801 of the swirl chamber is located in the area of 40%-60% of the center line of the swirl chamber 8. The intersection of the center line 301 of the respirator exhaust gas intake pipe and the center line 801 of the swirl chamber is located in the area of 45%-55% of the center line of the swirl chamber 8. The center line 801 of the swirl chamber is located at the outlet position of the swirl chamber 8 as 100%. That is, the swirl chamber 8 is located at the outlet position of the swirl chamber 8 away from the center line 801 of the swirl chamber as 0%. Such an arrangement can avoid mutual interference between the EGR exhaust gas and the gas of the respirator, and can also achieve premixing of the EGR exhaust gas and the gas of the respirator in the swirl chamber 8.
[0054] The cross-sectional area of the swirl chamber 8 along the direction perpendicular to the gas flow direction gradually increases. As the cross-sectional area of the swirl chamber 8 gradually increases, the internal pressure of the swirl chamber 8 is reduced.
[0055] like Figure 6 and Figure 7 As shown, in order to improve the swirl effect, preferably, the first angle A between the tangent line of the center line 801 of the swirl chamber and the center line 401 of the EGR exhaust gas intake pipe in the gas flow direction and the second angle B between the tangent line of the center line 801 of the swirl chamber and the center line 301 of the respirator exhaust gas intake pipe in the gas flow direction are both obtuse angles. Specifically, the degrees of the first angle and the second angle can be the same or different.
[0056] The present application provides an engine including a supercharger and a supercharger pre-pressure pipeline connected to the supercharger, wherein the supercharger pre-pressure pipeline is any of the above-mentioned supercharger pre-pressure pipelines. The above text describes the specific structure of the supercharger pre-pressure pipeline, and the present application includes the above-mentioned supercharger pre-pressure pipeline, and also has the above-mentioned technical effects.
[0057] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.
[0058] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.
[0059] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A supercharger pre-pressure pipeline, characterized in that: include: A main pipeline (5), wherein one end of the air flow chamber (6) of the main pipeline (5) serves as a first inlet (1) for receiving the air filtered gas, and the other end serves as an outlet (2) for receiving the supercharger; An EGR exhaust gas intake pipe (4), wherein an intake end of the EGR exhaust gas intake pipe (4) is used to receive low-pressure EGR exhaust gas; A respirator exhaust gas intake pipe (3), wherein the intake end of the respirator exhaust gas intake pipe (3) is used to connect to the engine respirator; A swirl chamber (8), the air outlet of the swirl chamber (8) is connected to the air flow chamber (6), the air outlet of the EGR exhaust gas intake pipe (4) and the air outlet of the respirator exhaust gas intake pipe (3) are both connected to the swirl chamber (8), and a spiral flow path is formed in the swirl chamber (8) to spirally transport the low-pressure EGR exhaust gas and the gas of the engine respirator to the air flow chamber (6).
2. The supercharger pre-pressure pipeline according to claim 1, characterized in that: It also includes an external pipe (7) sleeved on the outside of the main pipe (5), the swirl chamber (8) is formed between the inner wall of the external pipe (7) and the outer wall of the main pipe (5), the air outlet of the swirl chamber (8) is opened on the outer wall of the main pipe (5), and the EGR exhaust gas intake pipe (4) and the respirator exhaust gas intake pipe (3) are connected to the external pipe (7).
3. The supercharger pre-pressure pipeline according to claim 2, characterized in that: The external pipe (7) and the main pipe (5) are integrally formed.
4. The supercharger pre-pressure pipeline according to claim 1, characterized in that: The EGR exhaust gas intake pipe (4) and the respirator exhaust gas intake pipe (3) are integrally formed with the main pipe (5).
5. The supercharger pre-pressure pipeline according to claim 1, characterized in that: Along the gas flow direction in the cyclone chamber (8), the outlet of the EGR exhaust gas inlet pipe (4) is located upstream of the outlet of the respirator exhaust gas inlet pipe (3).
6. The supercharger pre-pressure pipeline according to claim 5, characterized in that: A preset mixing cavity is formed between the gas outlet of the exhaust gas inlet pipe (3) of the respirator and the gas outlet of the cyclone cavity (8) in the cyclone cavity (8).
7. The supercharger pre-pressure pipeline according to claim 1, characterized in that: The cross-sectional area of the cyclone chamber (8) gradually increases along the direction perpendicular to the gas flow direction.
8. The supercharger pre-pressure pipeline according to claim 1, characterized in that: A first angle between a tangent line of the center line (801) of the swirl chamber and a center line (401) of the EGR exhaust gas intake pipe in the gas flow direction and a second angle between a tangent line of the center line (801) of the swirl chamber and a center line (301) of the respirator exhaust gas intake pipe in the gas flow direction are both obtuse angles.
9. The supercharger pre-compression pipeline according to any one of claims 1 to 8, characterized in that: The intersection of the center line (401) of the EGR exhaust gas intake pipe and the center line (801) of the swirl chamber is located in the area of 10%-20% of the center line of the swirl chamber, the intersection of the center line (301) of the respirator exhaust gas intake pipe and the center line (801) of the swirl chamber is located in the area of 40%-60% of the center line (801) of the swirl chamber, and the center line (801) of the swirl chamber takes the outlet position of the swirl chamber as 100% of the area.
10. An engine, characterized in that: The invention comprises a supercharger and a supercharger pre-pressure pipeline connected to the supercharger, wherein the supercharger pre-pressure pipeline is the supercharger pre-pressure pipeline according to any one of claims 1 to 9.