CN219081683U - Exhaust structure of internal combustion engine - Google Patents

Abstract

The application discloses internal-combustion engine exhaust structure, it belongs to locomotive spare part field, includes: a front cylinder exhaust pipe, a rear cylinder exhaust pipe, an oxygen sensor assembly, a tail pipe and a muffler assembly; the front cylinder exhaust pipe and the rear cylinder exhaust pipe are respectively connected to an internal combustion engine of the locomotive, and an oxygen sensor component is respectively connected to the front cylinder exhaust pipe and the rear cylinder exhaust pipe; the end, far away from the internal combustion engine, of the front cylinder exhaust pipe and the rear cylinder exhaust pipe is connected to one end of a tail pipe; the muffler assembly is connected to the other end of the tail pipe; a front cylinder three-way catalytic point is arranged on the front cylinder exhaust pipe; a rear cylinder three-way catalytic point is arranged at one end of the tail pipe, which is far away from the muffler assembly; and a cylinder three-way catalytic point is arranged at one end of the tail pipe close to the muffler. The exhaust structure of the internal combustion engine has the beneficial effects of providing a flexible three-way catalytic arrangement.

Description

Exhaust structure of internal combustion engine

Technical Field

The application relates to the field of locomotive parts, in particular to an exhaust structure of an internal combustion engine.

Background

The muffler is a part for reducing exhaust noise by reducing exhaust pressure and attenuating pulsation of the exhaust pressure, is one of important parts of a vehicle, has higher and higher requirements on locomotive displacement, power and functions along with the market, has more and more compact layout of all systems of the whole vehicle, simplifies assembly, and meets the emission requirements and the heat protection of the whole vehicle. Three-way catalysis is important in the exhaust system of locomotives as an important measure for emission reduction.

At present, as shown in fig. 1, a three-way catalytic layout mode of an exhaust emission system of a locomotive is generally that a coil is arranged near a muffler assembly, and three-way catalytic points are arranged on the coil, so that the exhaust is intensively treated before the exhaust generated by an internal combustion engine of the locomotive enters the muffler. The layout mode is too simple, and the coil pipes 10 are required to be additionally arranged around the muffler, so that the tube side of the tail gas of the internal combustion engine is increased, the vehicle is more heavy, the assembly work is more complicated, and for locomotives with different emission requirements, the coil pipes 10 with corresponding tube lengths are required to be designed so as to ensure that three-way catalysis is effective enough. In fact, the above reasons may lead to the problems that the assembly of the locomotive exhaust emission system is complicated and the three-way catalytic layout is difficult to adapt to the requirements.

There is no exhaust structure of an internal combustion engine with a flexible three-way catalytic arrangement.

Disclosure of Invention

The content of the present application is intended to introduce concepts in a simplified form that are further described below in the detailed description. The section of this application is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.

To solve the technical problems mentioned in the background section above, some embodiments of the present application provide an exhaust structure of an internal combustion engine, including: a front cylinder exhaust pipe, a rear cylinder exhaust pipe, an oxygen sensor assembly, a tail pipe and a muffler assembly; the front cylinder exhaust pipe and the rear cylinder exhaust pipe are respectively connected to an internal combustion engine of the locomotive, and an oxygen sensor component is respectively connected to the front cylinder exhaust pipe and the rear cylinder exhaust pipe; the end, far away from the internal combustion engine, of the front cylinder exhaust pipe and the rear cylinder exhaust pipe is connected to one end of a tail pipe; the muffler assembly is connected to the other end of the tail pipe; a front cylinder three-way catalytic point is arranged on the front cylinder exhaust pipe; a rear cylinder three-way catalytic point is arranged at one end of the tail pipe, which is far away from the muffler assembly; and a cylinder three-way catalytic point is arranged at one end of the tail pipe close to the muffler.

When the three-way catalytic device is used, the three-way catalytic positions are dispersed to three positions and distributed on the tube side before tail gas enters the muffler assembly, so that more tube sides are not required to be additionally arranged for distributing the three-way catalytic, and the assembly is simplified. Three-way catalysis points can be according to the three-way catalysis of different ratios of different emission requirements, realize quick overall arrangement for the exhaust system of this application has the nimble characteristics of three-way catalysis arrangement.

Further, the tailpipe includes: a front pipe, a rear pipe and a connecting flange; the front cylinder exhaust pipe and the rear cylinder exhaust pipe are connected to the front pipe, and the rear cylinder three-way catalytic point is arranged on the front pipe; the silencer assembly is connected to the rear pipe, and the three-way catalytic point of the cylinder body is arranged on the rear pipe; the front pipe is connected with the rear pipe through a connecting flange.

Further, the connection flange includes: the device comprises a front flange, a rear flange, a sealing element and a connecting bolt; the front flange is fixedly connected to one end of the front pipe, which is close to the muffler assembly; the rear flange is fixedly connected to one end of the rear pipe, which is far away from the muffler assembly; the sealing element is positioned between the front flange and the rear flange; the front flange and the rear flange are fixedly connected through a plurality of connecting bolts.

Further, the connection flange further comprises: a spring; the spring is sleeved on the connecting bolt so as to compress the front flange, the rear flange and the sealing element.

Further, a flange plate is arranged on the front cylinder exhaust pipe; the flange plate is positioned between the front cylinder three-way catalytic point and the tail pipe and at one end between the two and close to the front cylinder three-way catalytic point.

The beneficial effects of this application lie in: an exhaust structure of an internal combustion engine is provided with flexible specific three-way catalytic arrangements.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the application and to provide a further understanding of the application with regard to the other features, objects and advantages of the application. The drawings of the illustrative embodiments of the present application and their descriptions are for the purpose of illustrating the present application and are not to be construed as unduly limiting the present application.

In addition, the same or similar reference numerals denote the same or similar elements throughout the drawings. It should be understood that the figures are schematic and that elements and components are not necessarily drawn to scale.

In the drawings:

FIG. 1 is a schematic diagram of a prior art three-way catalytic layout of a locomotive exhaust system;

FIG. 2 is an overall schematic diagram according to an embodiment of the present application;

fig. 3 is an overall schematic diagram of another perspective according to an embodiment of the present application.

Reference numerals:

1. a front cylinder exhaust pipe;

2. a rear cylinder exhaust pipe;

3. an oxygen sensor assembly;

4. a tail pipe; 41. a front tube; 42. a rear tube; 43. a connecting flange; 431. a front flange; 432. a rear flange; 433. a seal; 434. a connecting bolt; 435. a spring;

5. a muffler assembly;

6. a flange plate;

7. a front cylinder three-way catalytic point;

8. a rear cylinder three-way catalytic point;

9. a cylinder three-way catalytic point;

10. a coiled pipe.

Detailed Description

Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. It should be understood that the drawings and embodiments of the present disclosure are for illustration purposes only and are not intended to limit the scope of the present disclosure.

It should be noted that, for convenience of description, only the portions related to the present utility model are shown in the drawings. Embodiments of the present disclosure and features of embodiments may be combined with each other without conflict.

It should be noted that the terms "first," "second," and the like in this disclosure are merely used to distinguish between different devices, modules, or units and are not used to define an order or interdependence of functions performed by the devices, modules, or units.

It should be noted that references to "one", "a plurality" and "a plurality" in this disclosure are intended to be illustrative rather than limiting, and those of ordinary skill in the art will appreciate that "one or more" is intended to be understood as "one or more" unless the context clearly indicates otherwise.

The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Referring to fig. 2-3, an exhaust structure for an internal combustion engine, comprising: a front cylinder exhaust pipe 1, a rear cylinder exhaust pipe 2, an oxygen sensor assembly 3, a tail pipe 4 and a muffler assembly 5. Wherein the front cylinder exhaust pipe 1 and the rear cylinder exhaust pipe 2 are respectively connected to an internal combustion engine of a locomotive. An oxygen sensor component 3 is respectively connected to the front cylinder exhaust pipe 1 and the rear cylinder exhaust pipe 2 and is used for detecting the oxygen content of the tail gas. The ends of the front cylinder exhaust pipe 1 and the rear cylinder exhaust pipe 2, which are far away from the internal combustion engine, are connected to one end of a tail pipe 4, namely, the tail pipe 4 is provided with two air inlets, and the front cylinder exhaust pipe 1 and the rear cylinder exhaust pipe 2 are respectively communicated. The muffler assembly 5 is connected to the other end of the tail pipe 4 such that exhaust gas flows to the muffler assembly 5 through the front cylinder exhaust pipe 1, the rear cylinder exhaust pipe 2, and the tail pipe 4. As a ternary layout for an exhaust system, in the application, a front cylinder ternary catalytic point 7 is arranged on a front cylinder exhaust pipe 1, a rear cylinder ternary catalytic point 8 is arranged at one end of a tail pipe 4 far away from a muffler assembly 5, a barrel ternary catalytic point 9 is arranged at one end of the tail pipe 4 near the muffler, and three ternary catalytic points are independently arranged to purify tail gas before entering the muffler assembly 5.

In a still further aspect, the tailpipe 4 comprises: a front tube 41, a rear tube 42, and a connecting flange 43. Wherein, front cylinder exhaust pipe 1 and rear cylinder exhaust pipe 2 are fixedly connected on front pipe 41, and rear cylinder three-way catalytic point 8 is arranged on front pipe 41. While the muffler assembly 5 is attached to the rear pipe 42 and the barrel three-way catalytic site 9 is disposed on the rear pipe 42. The front pipe 41 and the rear pipe 42 are connected through the connecting flange 43, so that the front pipe 41 and the rear pipe 42 can be detached from the connecting flange 43 to be separated according to the emission requirements of the locomotive. It is determined whether cylinder three-way catalysis or rear cylinder three-way catalysis needs to be set. If the actual use of the locomotive does not need to set a barrel three-way catalytic point or a rear cylinder three-way catalytic point, the barrel three-way catalytic point or the rear cylinder three-way catalytic point is not set in the rear pipe 42 or the money pot correspondingly.

Specifically, the connection flange 43 includes: front flange 431, rear flange 432, seal 433, and connecting bolts 434. Wherein, the front flange 431 is fixedly connected to one end of the front pipe 41 near the muffler assembly 5. Rear flange 432 is fixedly attached to the end of rear tube 42 remote from muffler assembly 5. A seal 433 is positioned between the front flange 431 and the rear flange 432, the seal 433 preferably being a graphite ring that seals between the front tube 41 and the rear tube 42. The front flange 431 and the rear flange 432 are fixedly connected by a plurality of connecting bolts 434 to integrally connect the front pipe 41, the front flange 431, the rear flange 432 and the rear pipe 42. In addition, the connection flange 43 contains a spring 435. The spring 435 is sleeved on the connecting bolt 434, and the spring 435 gradually compresses the front flange 431, the rear flange 432 and the sealing member 433 therebetween during the process of tightening the connecting bolt 434, so as to compress the front flange 431, the rear flange 432 and the sealing member 433.

In a further embodiment, the front cylinder exhaust pipe 1 is provided with a flange 6. The flange 6 is located between the front cylinder three-way catalytic point 7 and the tail pipe 4, and is located at one end between the two and close to the front cylinder three-way catalytic point 7, and the specific structure of the flange 6 is the same as that of the connecting flange 43. By arranging the flange 6, whether the front cylinder three-way catalysis is arranged on the front cylinder exhaust pipe 1 or not is conveniently selected according to the actual use requirement of the locomotive.

The foregoing description is only of the preferred embodiments of the present disclosure and description of the principles of the technology being employed. It will be appreciated by those skilled in the art that the scope of the utility model in the embodiments of the present disclosure is not limited to the specific combination of the above technical features, but encompasses other technical features formed by any combination of the above technical features or their equivalents without departing from the spirit of the utility model. Such as the above-described features, are mutually substituted with (but not limited to) the features having similar functions disclosed in the embodiments of the present disclosure.

Claims (5)

1. An exhaust structure of an internal combustion engine, comprising: a front cylinder exhaust pipe, a rear cylinder exhaust pipe, an oxygen sensor assembly, a tail pipe and a muffler assembly; the front cylinder exhaust pipe and the rear cylinder exhaust pipe are respectively connected to an internal combustion engine of the locomotive, and an oxygen sensor assembly is respectively connected to the front cylinder exhaust pipe and the rear cylinder exhaust pipe; the end, far away from the internal combustion engine, of the front cylinder exhaust pipe and the rear cylinder exhaust pipe is connected to one end of a tail pipe; the muffler assembly is connected to the other end of the tail pipe;

the method is characterized in that: a front cylinder three-way catalytic point is arranged on the front cylinder exhaust pipe; a rear cylinder three-way catalytic point is arranged at one end of the tail pipe, which is far away from the muffler assembly; and a cylinder three-way catalytic point is arranged at one end of the tail pipe close to the muffler.

2. The exhaust structure of an internal combustion engine according to claim 1, characterized in that:

the tail pipe comprises: a front pipe, a rear pipe and a connecting flange; the front cylinder exhaust pipe and the rear cylinder exhaust pipe are connected to the front pipe, and the rear cylinder three-way catalytic point is arranged on the front pipe; the silencer assembly is connected to the rear pipe, and the three-way catalytic point of the cylinder body is arranged on the rear pipe; the front pipe is connected with the rear pipe through a connecting flange.

3. The exhaust structure of an internal combustion engine according to claim 2, characterized in that:

the connection flange comprises: the device comprises a front flange, a rear flange, a sealing element and a connecting bolt; the front flange is fixedly connected to one end of the front pipe, which is close to the muffler assembly; the rear flange is fixedly connected to one end of the rear pipe, which is far away from the muffler assembly; the sealing element is positioned between the front flange and the rear flange; the front flange and the rear flange are fixedly connected through a plurality of connecting bolts.

4. An exhaust structure of an internal combustion engine according to claim 3, characterized in that:

the connection flange further comprises: a spring; the spring is sleeved on the connecting bolt so as to compress the front flange, the rear flange and the sealing element.

5. The exhaust structure of an internal combustion engine according to claim 1, characterized in that: a flange plate is arranged on the front cylinder exhaust pipe; the flange plate is positioned between the front cylinder three-way catalytic point and the tail pipe and at one end between the two and close to the front cylinder three-way catalytic point.

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