CN202391532U - Exhaust manifold of automobile engine - Google Patents

Abstract

The utility model provides an automobile engine exhaust manifold, which belongs to the technical field of vehicles. It solves the technical problems of low structural strength and short service life of the existing automobile engine exhaust manifold. The automobile engine exhaust manifold includes a main body, the main body has an intake branch pipe and an exhaust main pipe connected to each other, and several reinforcing ribs are arranged at the connection between the intake branch pipe and the exhaust main pipe. The utility model has the advantages of high structural strength, simple structure, long service life and high reliability.

Description

Automobile Engine Exhaust Manifold

technical field

The utility model belongs to the technical field of vehicles and relates to an exhaust manifold of an automobile engine.

Background technique

With the rapid development of my country's economy and the improvement of people's awareness of cars, people's requirements for vehicles are not only safety, power and appearance. The NVH performance of vehicles has increasingly affected customers' intuitive feelings about vehicles. When choosing a vehicle, the metropolis pays attention to the noise and vibration performance of the vehicle.

As we all know, the engine generates power by burning fuel in the cylinder. Since the amount of fuel input is limited by the amount of air sucked into the cylinder, the power generated by the engine will also be limited. If the engine is running at its best state, increasing the output power can only increase the amount of fuel by compressing more air into the cylinder, thereby improving the combustion performance. Under the current technical conditions, the turbocharger is the only mechanical device that can increase the output power of the engine without changing the working efficiency.

Generally speaking, turbocharging is to install a supercharger in the middle and lower part of the engine exhaust manifold, and use the inertial momentum of the exhaust gas discharged from the engine exhaust manifold to drive the turbine in the turbocharger turbine chamber, and the turbine drives the coaxial The impeller pressurizes the air sent by the air filter pipe to pressurize it into the cylinder. Since the exhaust manifold is directly connected to the engine, the vibration of the engine is directly transmitted to the exhaust manifold. Therefore, the layout of the supercharger has higher requirements on the exhaust manifold. At present, due to the unreasonable design of the engine exhaust manifold , its structural strength is difficult to meet the actual use requirements, especially when the vehicle accelerates and decelerates, turns and bumps up and down, the exhaust manifold is affected by thermal load and vibration, which will cause the risk of fracture, resulting in failure of the supercharger, serious It affects the normal operation of the engine, and at the same time affects the NVH characteristics of the car, causing a significant increase in the vibration and noise of the car.

Contents of the invention

The purpose of the utility model is to solve the above-mentioned problems in the existing technology, and propose an automobile engine exhaust manifold, which has higher structural strength and longer service life.

The purpose of the utility model can be achieved through the following technical proposals: an automobile engine exhaust manifold, comprising a body, the body has an intake branch pipe and an exhaust main pipe communicated with each other, the intake branch pipe and the exhaust exhaust pipe Several reinforcing ribs are arranged at the junction of the main pipe.

Since the exhaust manifold of the engine exhaust manifold is connected to the supercharger, the part where the intake branch pipe is connected to the exhaust manifold is the most easily damaged part of the entire exhaust manifold. Reinforcing ribs are set at the connection, which can most effectively improve the overall structural strength of the engine exhaust manifold, which is conducive to the stable operation of the supercharger, reduces the vibration and noise of the engine operation, and improves the NVH characteristics of the whole machine. In addition, the structural strength of the exhaust manifold is increased, and the exhaust manifold can withstand the vibration required for work without damage, so the service life of the exhaust manifold is extended and the reliability is also greatly improved.

In the above automobile engine exhaust manifold, the reinforcing rib is integrated with the body. The reinforcing rib is integrated with the main body, so that the structure of the exhaust manifold is simple, and at the same time, the manufacturing difficulty and production cost can be reduced.

In the above automobile engine exhaust manifold, the exhaust manifold is arc-shaped, and the reinforcing rib is located on the concave side of the exhaust manifold. The ribs are located on the concave side of the exhaust manifold, which can most effectively increase the structural strength of the exhaust manifold.

In the above automobile engine exhaust manifold, the reinforcing ribs are distributed along the circumference of the exhaust manifold.

In the above automobile engine exhaust manifold, the body further has a heat shield bolt boss, and one of the reinforcing ribs is connected with the heat shield bolt boss.

In the above automobile engine exhaust manifold, the number of the reinforcing ribs is 2-8. As an optimal solution, the number of reinforcing ribs of the automobile engine exhaust manifold is 5.

Compared with the prior art, the automobile engine exhaust manifold has the following advantages:

1. The exhaust manifold of the automobile engine is equipped with reinforcing ribs at the connection between the intake branch pipe and the exhaust main pipe, which greatly improves the structural strength of the exhaust manifold, reduces the vibration and noise of the engine running, and improves the The NVH characteristics of the whole machine.

2. The structural strength of the engine exhaust manifold is increased, so the exhaust manifold has better durability and reliability.

3. The automobile engine exhaust manifold has the advantages of simple structure, long service life and high reliability.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the automobile engine exhaust manifold.

Fig. 2 is a front structural schematic diagram of the exhaust manifold of the automobile engine.

Fig. 3 is a bottom-view structure schematic diagram of the automobile engine exhaust manifold.

Fig. 4 is a schematic sectional structure diagram of the automobile engine exhaust manifold.

In the figure, 1. Intake branch pipe; 2. Exhaust main pipe; 3. Reinforcing rib; 4. Bolt boss of heat shield; 31. Reinforcing rib 1; 32. Reinforcing rib 2; 33. Reinforcing rib 3; 34. Reinforcement Rib four; 35, strengthen rib five.

Detailed ways

The following are specific embodiments of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model is not limited to these embodiments.

As shown in Fig. 1, Fig. 2 and Fig. 3, the automobile engine exhaust manifold comprises a body, and the body has an intake branch pipe 1 and an exhaust main pipe 2 and the like.

Specifically, the intake branch pipe 1 and the exhaust manifold 2 of the body of the automobile engine exhaust manifold communicate with each other, and the body also has a heat shield bolt boss 4 for installing a heat shield, and one of the reinforcing ribs is connected with the heat shield. The bolt bosses 4 of the heat shield are connected, and flanges are respectively arranged at the mouths of the intake branch pipe 1 and the exhaust main pipe 2 . In order to increase the structural strength of the exhaust manifold of the engine, several reinforcing ribs 3 are provided at the junction of the intake branch pipe 1 and the exhaust manifold 2. At the same time, in order to make the structure of the exhaust manifold simple and save production costs, the design of the reinforcing ribs 3 It is integrated with the body of the exhaust manifold. The engine exhaust manifold exhaust main pipe 2 is arc-shaped, and the reinforcing ribs 3 are located on the concave side of the exhaust main pipe 2 and distributed along the exhaust main pipe 2 circumferential direction. Theoretically, the number of ribs 3 can be arbitrarily designed, but usually the number of ribs 3 is selected to be 2 to 8 in actual conditions. As the optimal solution, the number of ribs 3 in the exhaust manifold of the automobile engine is 5.

The rationality of the design of the rib 3 of the engine exhaust manifold has a great influence on the overall structural strength of the exhaust manifold. On the basis of the design method of the rib 3 above, the design scheme of the rib 3 is still various, as follows It is a design scheme of a reinforcing rib 3 of the present utility model. As shown in Figure 1, Figure 2, and Figure 4, in this scheme, the number of ribs 3 is five, including rib one 31, rib two 32, rib three 33, rib four 34 and rib five 35. One end of the reinforcing rib 31 is connected with the flange on the exhaust main pipe 2, and the other end is connected with the flange on the intake branch pipe 1 closest to the exhaust main pipe 2. Because the span of rib 1 31 is long, therefore, rib 2 32 is designed to strengthen rib 1 31. One end of rib 2 32 is connected to the roughly middle position of rib 1 31, and the other end is connected to the heat shield on the body. The bolt bosses 4 are connected; the rib three 33 connects the heat shield bolt boss and the flange on the exhaust manifold 2, the rib three 33 is in common with the rib one 31, the rib two 32 and the heat shield bolt boss 4 Enclosed into an area, the ribs are connected, which greatly increases the structural strength of the outlet of the exhaust manifold. Among all the reinforcement ribs 3 mentioned above, the thickness of reinforcement rib 5 35 is the largest, and reinforcement rib 4 34 has a supplementary effect on reinforcement rib 5 35. Through such a design, the strength and rigidity of the exhaust main pipe 2 are effectively enhanced to prevent exhaust After the flange on the gas main pipe 2 is connected to the supercharger, it is bent to cause strength damage, which improves the NHV characteristics of the whole machine.

The specific embodiments described herein are only examples to illustrate the spirit of the present invention. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the utility model or go beyond the appended claims defined range.

Although terms such as intake branch pipe 1, exhaust manifold 2, and heat shield bolt boss 4 are frequently used in this paper, the possibility of using other terms is not excluded. These terms are only used to describe and explain the essence of the utility model more conveniently; interpreting them as any kind of additional limitation is contrary to the spirit of the utility model.

Claims (6)

1. an automobile engine exhaust manifold, comprising a body, the body has an intake branch pipe (1) and an exhaust manifold (2) communicated with each other, it is characterized in that, the described intake branch pipe (1) and the described A plurality of reinforcing ribs (3) are arranged at the junction of the exhaust main pipe (2). 2. The automobile engine exhaust manifold according to claim 1, characterized in that, the reinforcing rib (3) is integrated with the body. 3. The automobile engine exhaust manifold according to claim 2, characterized in that, the exhaust manifold (2) is arc-shaped, and the reinforcing rib (3) is located at the exhaust manifold (2) ) on the concave side. 4. The automobile engine exhaust manifold according to claim 3, characterized in that, the reinforcing ribs (3) are distributed along the circumference of the exhaust manifold (2). 5. according to claim 1 or 2 or 3 or 4 described automobile engine exhaust manifolds, it is characterized in that, described body also has heat shield bolt boss (4), wherein a reinforcement rib (3) and The bolt bosses (4) of the heat shield are connected to each other. 6. The automobile engine exhaust manifold according to claim 1 or 2 or 3 or 4, characterized in that the number of the reinforcing ribs (3) is 2-8.

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