Multi-waste-gas-valve structure of two-stage supercharger

Abstract

The utility model discloses a multi-waste-gas-valve structure of a two-stage supercharger, which comprises a rocker, an oscillating head arranged on the rocker and a plurality of valve covers arranged on the oscillating head. According to the multi-waste gas valve structure of the two-stage supercharger, the waste gas emission efficiency can be improved by increasing the number of the waste gas valves, and thermal fatigue and damage of engine parts caused by untimely exhaust are avoided.

Description

Technical Field

[0001] This utility model belongs to the field of engine technology. Specifically, this utility model relates to a multi-exhaust valve structure for a two-stage turbocharger. Background Technology

[0002] The wastegate valve is a key component in the turbocharger system of an internal combustion engine. Its function is directly related to the performance of the turbocharger and the stability of the internal combustion engine. The wastegate valve is usually called the wastegate bypass valve or wastegate valve. Its main functions include: controlling the turbine speed, improving responsiveness, reducing exhaust pressure, reducing the risk of turbo stall, and improving fuel economy. Therefore, this component plays a vital role in improving engine performance, protecting the turbocharger, and improving the driving experience.

[0003] Chinese Patent Application No. 202022791088.7 discloses a turbocharger exhaust valve assembly, including a rocker arm and a valve cover. A first cylinder, which mates with the rocker arm, is located at the geometric center of the top of the valve cover. A second cylinder is located on the first cylinder. A stepped structure is provided on the top surface of the valve cover along the bottom of the first cylinder. The stepped structure is evenly distributed along the circumference of the first cylinder, and grooves and valve cover positioning elastic gaskets are provided between the stepped structures. The valve cover positioning elastic gaskets mate with the second cylinder. This design reduces noise and wear while ensuring valve sealing. Furthermore, the design is simple to manufacture and has good valve reliability and low failure risk.

[0004] However, in practical applications, the exhaust valve shown in the prior art is a single valve structure. When faced with secondary turbocharging, the high-temperature exhaust gas generated cannot be discharged in time due to the size and opening of the exhaust valve, which will cause the engine temperature to rise and lead to thermal fatigue and damage to engine components.

[0005] The aim is to provide an improved multi-exhaust valve structure for a two-stage turbocharger, particularly addressing the problem of thermal fatigue and damage to engine components caused by untimely exhaust. Utility Model Content

[0006] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention provides a multi-exhaust valve structure for a two-stage turbocharger, the purpose of which is to avoid thermal fatigue and damage to engine components caused by untimely exhaust.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a multi-exhaust valve structure for a two-stage booster, including a rocker arm, a swivel mounted on the rocker arm, and a valve cover mounted on the swivel, with multiple valve covers provided.

[0008] The rocker arm includes a valve cover mounting part and a rotating part. Multiple valve covers are rotatably mounted in multiple valve cover mounting holes opened on the valve cover mounting part, and the rocker arm is fixedly connected to the rotating part.

[0009] The valve cover includes a valve head, a valve stem, and a valve stem fixed end. The geometric center of the valve head is connected to the valve stem fixed end through the valve stem, and the valve head and the valve stem fixed end are respectively fixedly connected to one end of the valve stem. The valve stem is inserted into the valve cover mounting hole.

[0010] An elastic gasket is provided between the valve cover mounting part and the valve cover, and the elastic gasket has multiple through holes for the valve stem to pass through.

[0011] The valve stem is provided with a fixing baffle at the fixed end, and the valve cover mounting part is provided with a baffle groove for the fixing baffle to be embedded.

[0012] Ribs are provided on the valve cover mounting section.

[0013] The rib is located between the two valve cover mounting holes, and multiple ribs are provided.

[0014] The multi-exhaust valve structure of the two-stage turbocharger of this utility model can improve exhaust gas emission efficiency by increasing the number of exhaust valves, and avoid thermal fatigue and damage to engine components caused by untimely exhaust. Attached Figure Description

[0015] This manual includes the following figures, which illustrate the following:

[0016] Figure 1 This is a three-dimensional schematic diagram of the multi-exhaust valve structure of the two-stage booster of this utility model;

[0017] Figure 2 This is an exploded view of the multi-exhaust valve structure of the two-stage turbocharger of this utility model;

[0018] Figure 3 This is a full sectional view of the valve cover mounting part of this utility model;

[0019] Figure 4 This is a three-dimensional schematic diagram of the overall structure of the front and back sides of the swing-head device of this utility model;

[0020] The diagram is marked as follows:

[0021] 1. Shaking head; 11. Valve cover mounting part; 111. Valve cover mounting hole; 112. Gasket groove; 113. Baffle groove; 114. Rib support; 12. Rotating part; 121. Rocker arm mounting hole; 2. Valve cover; 21. Valve head; 22. Valve stem; 23. Valve stem fixed end; 3. Rocker arm; 4. Elastic gasket; 5. Fixed baffle. Detailed Implementation

[0022] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of this utility model, and to facilitate its implementation.

[0023] It should be noted that in the following embodiments, the terms "first," "second," and "third" do not represent an absolute distinction in structure and / or function, nor do they represent the order of execution; they are merely for the convenience of description.

[0024] like Figures 1 to 4 As shown, this utility model provides a multi-exhaust valve structure for a two-stage turbocharger, including a rocker arm, a swivel mounted on the rocker arm, and multiple valve covers mounted on the swivel.

[0025] The rocker arm includes a valve cover mounting part and a rotating part. Multiple valve covers are rotatably mounted in multiple valve cover mounting holes opened on the valve cover mounting part, and the rocker arm is fixedly connected to the rotating part.

[0026] The valve cover includes a valve head, a valve stem, and a valve stem fixed end. The geometric center of the valve head is connected to the valve stem fixed end through the valve stem, and the valve head and the valve stem fixed end are respectively fixedly connected to one end of the valve stem. The valve stem is inserted into the valve cover mounting hole.

[0027] An elastic gasket is provided between the valve cover mounting part and the valve cover, and the elastic gasket has multiple through holes for the valve stem to pass through.

[0028] The valve stem is provided with a fixing baffle at the fixed end, and the valve cover mounting part is provided with a baffle groove for the fixing baffle to be embedded.

[0029] Ribs are provided on the valve cover mounting section.

[0030] The rib is located between the two valve cover mounting holes, and multiple ribs are provided.

[0031] Example

[0032] like Figures 1 to 4 As shown, this embodiment provides a multi-exhaust valve structure for a two-stage turbocharger, including a rocker arm 1, a valve cover 2, and a rocker arm 3. The valve cover 2 and the rocker arm 3 are both mounted on the rocker arm 1, wherein:

[0033] The oscillating mechanism 1 includes a valve cover mounting part 11 at the front end and a rotating part 12 at the rear end. Here, the front end and rear end refer to respectively... Figure 1 From the perspective of the observer, multiple valve covers 2 are rotated and installed in multiple through holes opened on the valve cover mounting part 11, facing the same side. One end of the rocker arm 3 is fixedly installed in the through hole opened on the rotating part 12.

[0034] As a preferred embodiment: such as Figure 4 As shown, the valve cover mounting part 11 has multiple symmetrical valve cover mounting holes 111 longitudinally opened. There are only two in the figure, but in reality there can be two or more. The selection is based on the requirements. The figure only shows the assembly relationship and structure. The valve cover mounting part 11 has a gasket groove 112 on the side facing the valve cover 2 and multiple baffle grooves 113 on the side away from the valve cover 2.

[0035] In a preferred embodiment, a rocker arm mounting hole 121 is longitudinally provided at one end of the rotating part 12 away from the valve cover mounting part 11. One end of the rocker arm 3 is fixedly installed in the rocker arm mounting hole 121. When the rocker arm 3 rotates, it will drive the head rocker 1 to rotate at a small angle.

[0036] In a preferred embodiment, the valve cover 2 includes a valve head 21, a valve stem 22, and a valve stem fixed end 23. The geometric center of the valve head 21 is connected to the valve stem fixed end 23 through the valve stem 22, and the valve head 21 and the valve stem fixed end 23 are respectively fixedly connected to one end of the valve stem 22.

[0037] As a preferred embodiment: such as Figure 2 An elastic gasket 4 is provided between the valve cover mounting part 11 and the valve cover 2. The elastic gasket 4 fits in the gasket groove 112 and has multiple through holes. The function of the elastic gasket 4 here is to reduce the force wear when the valve cover 2 rotates with the oscillating 1 and when the valve cover 2 is in contact with the exhaust valve. The through holes allow the valve stem 22 to pass through the elastic gasket 4. The valve stem fixed end 23 is provided with a fixed baffle 5 with a through hole at its geometric center. The fixed baffle 5 is provided in the baffle groove 113. The function of the fixed baffle 5 is to secure the valve stem fixed end 23 so that the valve cover 2 moves with the oscillating 1.

[0038] As a preferred embodiment: such as Figure 3 The valve stem 22 passes through the through hole on the elastic gasket 4 and the valve cover mounting hole 111 and is fitted by them. The valve stem fixed end 23 at one end of the valve stem 22 is fitted and fixed by the through hole opened at the geometric center of the fixed baffle 5. The outer frame of the fixed baffle 5 is fitted into the baffle groove 113.

[0039] As a preferred embodiment: On the side of the valve cover mounting part 11 away from the valve cover 2, two ribs 114 are provided at equal intervals in the horizontal direction at the center of the valve cover mounting hole 111. The side frame of the baffle groove 113 near the ribs 114 protrudes to form a baffle groove protection structure.

[0040] As a preferred embodiment: the multiple exhaust valves in the above-mentioned document do not conflict with the two exhaust valves shown in the figure. The two exhaust valves in the figure are only to show the assembly position of the exhaust valves of this technology and the overall structure after assembly. Based on this, the placement position of multiple exhaust valves can be increased by increasing the size of the valve cover mounting part 11 and opening multiple equally arranged valve cover mounting holes 111, thereby achieving the beneficial effects brought by the multiple exhaust valve structure.

[0041] The working principle of this utility model:

[0042] The rocker arm 3 is installed in the bushing on the turbine housing of the engine's second-stage turbocharger. A through hole, the same number as the valve cover 2, is provided on the turbine housing at the position where it fits against the valve cover 2. The gap between the valve cover 2 and the through hole is called the opening. When the rocker arm 3 rotates, it is connected to the valve cover 2 via the rocker arm 1. Thus, when the rocker arm 3 rotates, the valve cover 2 will also rotate. The exhaust bypass volume can be adjusted by adjusting the opening of the valve cover 2.

[0043] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A multi-waste-gate structure for a two-stage supercharger, characterized by: The valve cover is provided with a plurality of valve heads, a rocker, a rocker head arranged on the rocker, and a valve cover arranged on the rocker head. The rocker head includes a valve cover mounting portion and a rotating portion, and a plurality of valve covers are rotatably mounted in a plurality of valve cover mounting holes of the valve cover mounting portion. The valve cover includes a valve head, a valve stem, and a valve stem fixed end, the geometric center of the valve head and the valve stem fixed end are connected by the valve stem, and the valve head and the valve stem fixed end are fixedly connected with one end of the valve stem, and the valve stem is inserted into the valve cover mounting hole. An elastic gasket is arranged between the valve cover mounting portion and the valve cover, a plurality of through holes for the valve stem to pass through are arranged on the elastic gasket, a gasket groove is arranged on the side of the valve cover mounting portion facing the valve cover, and the elastic gasket fits in the gasket groove. Two rib supports are equidistantly arranged on the side of the valve cover mounting portion away from the valve cover and located in the middle of the valve cover mounting hole in the horizontal direction, and the side frame of the baffle groove close to the rib support is raised to form a baffle groove protection structure.

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