Sealing gasket for improving uniformity of EGR (Exhaust Gas Recirculation) mixed gas

Abstract

The utility model relates to a sealing gasket for improving the uniformity of EGR (Exhaust Gas Recirculation) mixed gas, which comprises a sealing gasket body, the central area of the sealing gasket is recessed inwards along the airflow direction, a plurality of through holes are formed in the sealing gasket body, and cooled waste gas passes through the through holes. The sealing gasket body divides a single large airflow medium into a plurality of small airflows while ensuring the sealing performance, the plurality of small airflows can be uniformly mixed with air in a shorter time and a shorter distance, and the uniformity of the intake manifold is improved, so that the combustion uniformity is improved, and the power output of an engine is more stable.

Description

Technical Field

[0001] The utility model relates to the technical field of EGR, in particular to a sealing pad for improving the uniformity of EGR mixed gas. Background Art

[0002] At present, hybrid engines generally use EGR technology to reduce fuel consumption. Part of the exhaust gas is cooled through the EGR system and then reintroduced into the intake manifold. The exhaust gas after combustion needs to be evenly distributed to the branches of the manifold and finally enter the combustion chamber to participate in combustion. In order to improve the uniformity of intake, some engines are designed with EGR distributors, but some engines are still not designed with EGR distributors. Different types of EGR distributors have different structures and performances. Most of them are integrated in the intake manifold, resulting in a complex intake manifold structure and high cost. Engines without EGR distributors have relatively poor intake uniformity, which affects the combustion uniformity, thereby affecting the engine's power output, fuel consumption, emissions and NVH.

[0003] In order to improve the uniformity of intake air, a sealing gasket is specially invented to improve the uniformity of EGR mixture and ensure effective sealing. At the same time, it has the function of EGR distributor, thereby simplifying the intake manifold with integrated EGR distributor and reducing the overall cost of the engine. Utility Model Content

[0004] In view of this, the utility model provides a sealing gasket for improving the uniformity of EGR mixed gas. The through holes opened on the sealing gasket body divide a single large airflow into multiple small airflows to mix with the air behind the throttle valve, so that the cooling exhaust gas passing through the EGR system and the air are mixed more evenly.

[0005] The utility model provides a sealing gasket for improving the uniformity of EGR mixed gas, which adopts the following technical solution:

[0006] A sealing gasket for improving the uniformity of EGR mixed gas comprises a sealing gasket body, wherein the central area of ​​the sealing gasket is recessed inwardly along the airflow direction, and the sealing gasket body is provided with a plurality of through holes for the cooled exhaust gas to pass through.

[0007] Optionally, the through hole includes a central through hole and circumferential through holes, the central through hole is opened in the central area of ​​the sealing gasket, and the circumferential through holes are opened in multiple groups along the radial direction of the sealing gasket body, and each group of circumferential through holes is opened on the outer side of the central through hole along the circumference of the central through hole and has multiple holes.

[0008] Optionally, a sealing rib is provided on the sealing gasket body, the sealing rib is located on the outside of the through hole, and the sealing rib is elastic.

[0009] Optionally, the sealing gasket body is disposed between two components to prevent leakage of the medium, and the sealing rib is elastically deformed under pressure to be in close contact with the components.

[0010] Optionally, the sum of the cross-sectional areas of the through holes is greater than the cross-sectional area of ​​the EGR pipeline.

[0011] Optionally, the cross-section of the sealing gasket body is approximately circular.

[0012] Optionally, the sealing gasket body is provided with multiple layers.

[0013] Optionally, the sealing gasket body is made of high-strength metal material.

[0014] To sum up, the utility model includes at least one of the following beneficial technical effects: while ensuring the sealing performance, the sealing gasket body divides a single large airflow medium into multiple small airflows. The multiple small airflows can be evenly mixed with the air in a shorter time and a shorter distance, thereby improving the uniformity of the intake manifold, thereby improving the uniformity of combustion and making the engine power output more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the structure of the embodiment of the utility model during assembly;

[0017] Figure 2 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0018] Figure 3 It is a side view of an embodiment of the utility model.

[0019] Explanation of the reference numerals: 1. Sealing gasket body; 2. Central through hole; 3. Circumferential through hole; 4. Sealing rib. DETAILED DESCRIPTION

[0020] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0021] The following is combined with Figure 1-3 The utility model is described in further detail.

[0022] The utility model embodiment discloses a sealing gasket for improving the uniformity of EGR mixed gas.

[0023] Reference Figure 1 , Figure 2 , Figure 3 A sealing gasket for improving the uniformity of EGR mixed gas includes a sealing gasket body, the central area of ​​the sealing gasket is concave inward along the airflow direction, and a plurality of through holes are opened on the sealing gasket body, and the through holes are used for the cooled exhaust gas to pass through. While ensuring the sealing performance, the sealing gasket body divides a single large airflow medium into multiple small airflows, and the multiple small airflows can be mixed evenly with the air in a shorter time and a shorter distance, thereby improving the uniformity of the intake manifold, thereby improving the uniformity of combustion and making the engine power output more stable.

[0024] In this embodiment, the sealing gasket body is in the shape of a disk as a whole, and the cross section of the sealing gasket body is approximately circular. The sealing gasket body is made of high-strength metal material to improve the connection strength and stability of the connection.

[0025] The sealing gasket body is provided with multiple layers, and the sealing gasket body can be provided with 1-3 layers. In the present embodiment, the sealing gasket body is provided with one layer.

[0026] The through holes include a central through hole and a circumferential through hole. The central through hole is opened in the central area of ​​the sealing gasket. There are multiple groups of circumferential through holes along the radial direction of the sealing gasket body. Each group of circumferential through holes is opened on the outer side of the central through hole along the circumference of the central through hole and multiple through holes are opened. The through holes of the sealing gasket body divide a single large airflow into multiple small airflows and mix them with the air after the throttle valve, so that the cooling exhaust gas passing through the EGR system is mixed with the air more evenly.

[0027] Among them, the size, distribution and number of the central through hole and the circumferential through hole are calculated according to CAE simulation to calculate the optimal values ​​for different models. The sum of the cross-sectional areas of all through holes is larger than the cross-sectional area of ​​the EGR pipeline, which is used to reduce the pressure loss of the entire EGR system.

[0028] A sealing rib is arranged on the sealing gasket body, the sealing rib is located outside the through hole, and the sealing rib is elastic.

[0029] The sealing gasket body is arranged between two components to be connected to prevent leakage of the medium. The sealing rib undergoes elastic deformation under pressure and comes into close contact with the components.

[0030] In this embodiment, a mounting hole is provided on the sealing gasket body, and the sealing gasket body is connected to the connecting piece through the mounting hole.

[0031] Compared with the traditional gasket, which only seals two parts that need to be connected to prevent leakage of the medium, the gasket body of the utility model can ensure the sealing performance while dividing the single large airflow medium into multiple small airflows. The multiple small airflows can be mixed evenly with the air in a shorter time and a shorter distance, which improves the uniformity of the intake manifold, thereby improving the uniformity of combustion and making the engine power output more stable.

[0032] The implementation principle of the utility model is: the sealing gasket body of the utility model is installed between two parts that need to be sealed, and the sealing ribs are elastically deformed under the action of pressure, and are in close contact with the parts to form a good seal. After the EGR valve is opened, the airflow passes through the through hole in the center of the sealing gasket and is divided into multiple small airflows, which can be evenly mixed with the air in a shorter time and a shorter distance.

[0033] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The description of the above embodiments is only used to help understand the method and core ideas of the utility model. The above is only the preferred implementation method of the utility model. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principle of the utility model, they can make some improvements, embellishments or changes, and can also combine the above technical features in an appropriate manner; these improvements, embellishments, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the protection scope of the utility model.

Claims

1. A sealing gasket for improving the uniformity of EGR mixed gas, characterized by: It includes a sealing gasket body, the central area of ​​which is recessed inwardly along the airflow direction, and a plurality of through holes are provided on the sealing gasket body, and the through holes are used for the cooled exhaust gas to pass through; the through holes include a central through hole and a circumferential through hole, and the central through hole is provided in the central area of ​​the sealing gasket, and a plurality of groups of circumferential through holes are provided along the radial direction of the sealing gasket body, and each group of circumferential through holes is provided on the outer side of the central through hole along the circumference of the central through hole and a plurality of through holes are provided, and the sum of the cross-sectional areas of the through holes is greater than the cross-sectional area of ​​the EGR pipeline.

2. The sealing gasket for improving the uniformity of EGR mixed gas according to claim 1, characterized in that: The sealing pad body is provided with a sealing rib, the sealing rib is located outside the through hole, and the sealing rib is elastic.

3. The sealing gasket for improving the uniformity of the EGR mixture according to claim 2, characterized in that: The sealing gasket body is arranged between two components to prevent leakage of the medium, and the sealing rib is elastically deformed under pressure to be in close contact with the components.

4. The sealing gasket for improving the uniformity of EGR mixed gas according to claim 1, characterized in that: The cross section of the sealing gasket body is approximately circular.

5. The sealing gasket for improving the uniformity of EGR mixed gas according to claim 1, characterized in that: The sealing gasket body is provided with multiple layers.

6. The sealing gasket for improving the uniformity of EGR mixed gas according to claim 5, characterized in that: The sealing gasket body is made of high-strength metal material.

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