Automobile exhaust pipe

Abstract

The invention relates to an automobile exhaust pipe, which comprises a connecting piece, wherein a fixing ring is arranged inside the connecting piece, a front exhaust pipe is connected to the lower part of the connecting piece, a three-way catalytic converter is arranged at the tail of the front exhaust pipe, a middle exhaust pipe is arranged at the rear of the three-way catalytic converter, a heat insulation layer and a sound-absorbing coating are arranged on the inner walls of the front exhaust pipe and the middle exhaust pipe in sequence from the inside to the outside, a particle trap is arranged at the tail of the middle exhaust pipe, a rear exhaust pipe is arranged at the rear of the particle trap, a sound-absorbing coating is arranged on the inner wall of the rear exhaust pipe, a muffler is arranged in the middle of the rear exhaust pipe, an exhaust port is arranged at the tail of the rear exhaust pipe, a filter screen is arranged on the inner side of the exhaust port, shock absorbers are arranged below the three-way catalytic converter and above the particle trap, the shock absorbers are connected to extension pipes, and the extension pipes are attached to the surfaces of the middle exhaust pipe, the particle trap, the rear exhaust pipe and the muffler. The exhaust pipe has the advantages of good cleaning effect, shock absorption and noise absorption, and long service life.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts, and in particular to an automobile exhaust pipe. Background Art

[0002] Cars have become the most common means of transportation for people, and car exhaust pipes are an important part of the entire vehicle. With the improvement of automobile emission limits both domestically and internationally, corresponding after-treatment systems are gradually added to automobile exhaust pipes. The automobile exhaust pipe is connected to the engine assembly. When the engine is working, resonance is generated between the engine and the automobile exhaust pipe, causing the automobile exhaust pipe to vibrate, accompanied by resonance noise, which not only affects the life of the automobile exhaust pipe but also increases the noise of the entire vehicle, resulting in a poor user experience. Therefore, an automobile exhaust pipe is needed. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide an automobile exhaust pipe with good cleaning effect, vibration reduction and noise absorption and long service life.

[0004] The objective of the present invention is achieved in this way: an automobile exhaust pipe comprises a connecting piece, a fixing ring is arranged inside the connecting piece, a front exhaust pipe is connected to the lower part of the connecting piece, a three-way catalytic converter is arranged at the tail of the front exhaust pipe, a middle exhaust pipe is arranged behind the three-way catalytic converter, a heat insulation layer and a sound-absorbing coating are arranged on the inner walls of the front exhaust pipe and the middle exhaust pipe from the inside to the outside, a particulate collector is arranged at the tail of the middle exhaust pipe, a rear exhaust pipe is arranged behind the particulate collector, a sound-absorbing coating is arranged on the inner wall of the rear exhaust pipe, a muffler is arranged in the middle of the rear exhaust pipe, an exhaust port is arranged at the tail of the rear exhaust pipe, a filter is arranged on the inner side of the exhaust port, shock absorbers are arranged below the three-way catalytic converter and above the particulate collector, and the shock absorbers are connected to extension pipes, and the extension pipes are attached to the surfaces of the middle exhaust pipe, the particulate collector, the rear exhaust pipe and the muffler.

[0005] The fixing ring is made of perfluoroether rubber.

[0006] The heat insulation layer is made of nano silicon dioxide and lanthanum hexaboride to form a good energy-saving nano microporous heat insulation material.

[0007] The noise-absorbing coating is an acrylic resin coating.

[0008] The filter net is a capsule-shaped body, and an adsorption layer is arranged inside.

[0009] The catalyst for the redox reaction in the three-way catalytic converter is Pt-Rh.

[0010] The beneficial effects of the present invention are as follows: a fixing ring is arranged between the engine and the connecting piece, and the fixing ring is made of perfluoroether rubber, which has good chemical properties and high temperature resistance, and can enhance its sealing performance while not reacting chemically with the connecting piece to generate new exhaust gas pollution; the three-way catalytic converter oxidizes carbon monoxide into carbon dioxide, hydrocarbons into water and carbon dioxide, and nitrogen oxides into nitrogen and oxygen through oxidation and reduction reactions; the three harmful gases are all converted into harmless gases; and the three-way catalyst must be at least 350 Celsius, it reacts. When the temperature is too low, the conversion efficiency drops sharply. Therefore, a heat insulation layer is arranged on the inner wall of the front exhaust pipe and the middle exhaust pipe. The heat insulation layer is made of nano-silicon dioxide and lanthanum hexaboride, which is a good energy-saving nano-microporous heat insulation material. Lanthanum hexaboride is an infrared blocking material. Therefore, it can effectively prevent heat loss and apply the heat energy generated by the engine to the three-way catalytic converter to improve its catalytic efficiency. A sound-absorbing coating is arranged on the inner wall of the front exhaust pipe, the middle exhaust pipe and the rear exhaust pipe. The sound-absorbing coating is an acrylic resin coating, which has the effect of suppressing the vibration of the shell structure, the propagation of structure-borne sound and the radiation of noise. It has good noise reduction and shock absorption effects, and also has the functions of heat insulation, sound absorption, rust prevention, corrosion prevention, and extending the service life of metal; the filter screen arranged on the inner side of the exhaust port is a capsule, and an adsorption layer is arranged inside, which can perform secondary cleaning on the exhaust gas to make the cleaning efficiency higher, and can be replaced according to specific usage conditions; the settings of the shock absorber and the extension pipe can greatly reduce the vibration of the exhaust pipe and extend its service life; the three-way catalytic converter, the particulate collector and the shock absorber can select appropriate models according to the specific situation; in a word, the present invention has the advantages of good cleaning effect, shock absorption and noise absorption, and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a front view of an automobile exhaust pipe of the present invention.

[0012] Among them: 1. Connector 2, fixing ring 3, front exhaust pipe 4, heat insulation layer 5, three-way catalytic converter 6, particulate collector 7, silencing coating 8, muffler 9, filter 10, exhaust port 11, shock absorber 12, extension pipe 13, rear exhaust pipe 14, middle exhaust pipe. DETAILED DESCRIPTION

[0013] The present invention will be further described below in conjunction with the accompanying drawings.

[0014] Example 1

[0015] like Figure 1As shown, an automobile exhaust pipe comprises a connecting member 1, wherein a fixing ring 2 is arranged inside the connecting member 1, a front exhaust pipe 3 is connected to the lower part of the connecting member 1, a three-way catalytic converter 5 is arranged at the tail of the front exhaust pipe 3, a middle exhaust pipe 14 is arranged behind the three-way catalytic converter 5, a heat insulation layer 4 and a noise-reducing coating 7 are arranged on the inner walls of the front exhaust pipe 3 and the middle exhaust pipe 14 from the inside to the outside, a particle collector 6 is arranged at the tail of the middle exhaust pipe 14, and a rear exhaust is arranged behind the particle collector 6. Tube 13, a sound-absorbing coating 7 is arranged on the inner wall of the rear exhaust pipe 13, a muffler 8 is arranged in the middle of the rear exhaust pipe 13, an exhaust port 10 is arranged at the tail of the rear exhaust pipe 13, a filter screen 9 is arranged on the inner side of the exhaust port 10, shock absorbers 11 are arranged below the three-way catalytic converter 5 and above the particulate collector 6, and the shock absorbers 11 are connected to extension pipes 12, and the extension pipes 12 are attached to the surfaces of the middle exhaust pipe 14, the particulate collector 6, the rear exhaust pipe 13 and the muffler 8.

[0016] The beneficial effects of the present invention are as follows: a fixing ring is arranged between the engine and the connecting piece to enhance the sealing performance; the three-way catalytic converter oxidizes carbon monoxide into carbon dioxide, hydrocarbons into water and carbon dioxide, and nitrogen oxides into nitrogen and oxygen through oxidation and reduction reactions; the three harmful gases are all converted into harmless gases; and the three-way catalyst has a minimum temperature of 350 °C. Celsius, and the conversion efficiency drops sharply when the temperature is too low; therefore, a heat insulation layer is arranged on the inner wall of the front exhaust pipe and the middle exhaust pipe, which can effectively prevent the heat loss, and apply the heat energy generated by the engine to the three-way catalytic converter to improve its catalytic efficiency; a sound-absorbing coating is arranged on the inner wall of the front exhaust pipe, the middle exhaust pipe and the rear exhaust pipe, which has good sound-absorbing and shock-absorbing effects, and also has heat insulation, sound absorption, rust prevention, corrosion prevention, and extends the service life of the metal; the filter screen arranged on the inner side of the exhaust port can perform secondary cleaning on the exhaust gas, so that the cleaning efficiency is higher, and it can be replaced according to the specific usage; the setting of the shock absorber and the extension pipe can greatly reduce the vibration of the exhaust pipe and extend its service life; the three-way catalytic converter, the particulate collector and the shock absorber can select appropriate models according to the specific situation; in a word, the present invention has the advantages of good cleaning effect, shock absorption and noise absorption, and long service life.

[0017] Example 2

[0018] like Figure 1As shown, an automobile exhaust pipe comprises a connecting member 1, wherein a fixing ring 2 is arranged inside the connecting member 1, a front exhaust pipe 3 is connected to the lower part of the connecting member 1, a three-way catalytic converter 5 is arranged at the tail of the front exhaust pipe 3, a middle exhaust pipe 14 is arranged behind the three-way catalytic converter 5, a heat insulation layer 4 and a sound-absorbing coating 7 are arranged on the inner walls of the front exhaust pipe 3 and the middle exhaust pipe 14 from the inside to the outside, a particle collector 6 is arranged at the tail of the middle exhaust pipe 14, a rear exhaust pipe 13 is arranged behind the particle collector 6, a sound-absorbing coating 7 is arranged on the inner wall of the rear exhaust pipe 13, a muffler 8 is arranged in the middle of the rear exhaust pipe 13, and a heat-absorbing coating 7 is arranged on the tail of the rear exhaust pipe 13. An exhaust port 10 is provided, a filter screen 9 is provided on the inner side of the exhaust port 10, shock absorbers 11 are provided below the three-way catalytic converter 5 and above the particulate collector 6, and the shock absorbers 11 are connected to extension pipes 12, and the extension pipes 12 are attached to the surfaces of the middle exhaust pipe 14, the particulate collector 6, the rear exhaust pipe 13 and the muffler 8; the fixing ring 2 is made of perfluoroether rubber; the thermal insulation layer 4 is made of nano-silicon dioxide and lanthanum hexaboride, which is a good energy-saving nano-microporous thermal insulation material; the silencing coating 7 is an acrylic resin paint coating; the filter screen 9 is a capsule, and an adsorption layer is provided inside; the catalyst for the redox reaction in the three-way catalytic converter 5 is Pt-Rh.

[0019] The beneficial effects of the present invention are as follows: a fixing ring is arranged between the engine and the connecting piece, and the fixing ring is made of perfluoroether rubber, which has good chemical properties and high temperature resistance, and can enhance its sealing performance while not reacting chemically with the connecting piece to generate new exhaust gas pollution; the three-way catalytic converter oxidizes carbon monoxide into carbon dioxide, hydrocarbons into water and carbon dioxide, and nitrogen oxides into nitrogen and oxygen through oxidation and reduction reactions; the three harmful gases are all converted into harmless gases; and the three-way catalyst must be at least 350 Celsius, it reacts. When the temperature is too low, the conversion efficiency drops sharply. Therefore, a heat insulation layer is arranged on the inner wall of the front exhaust pipe and the middle exhaust pipe. The heat insulation layer is made of nano-silicon dioxide and lanthanum hexaboride, which is a good energy-saving nano-microporous heat insulation material. Lanthanum hexaboride is an infrared blocking material. Therefore, it can effectively prevent heat loss and apply the heat energy generated by the engine to the three-way catalytic converter to improve its catalytic efficiency. A sound-absorbing coating is arranged on the inner wall of the front exhaust pipe, the middle exhaust pipe and the rear exhaust pipe. The sound-absorbing coating is an acrylic resin coating, which has the effect of suppressing the vibration of the shell structure, the propagation of structure-borne sound and the radiation of noise. It has good noise reduction and shock absorption effects, and also has the functions of heat insulation, sound absorption, rust prevention, corrosion prevention, and extending the service life of metal; the filter screen arranged on the inner side of the exhaust port is a capsule, and an adsorption layer is arranged inside, which can perform secondary cleaning on the exhaust gas to make the cleaning efficiency higher, and can be replaced according to specific usage conditions; the settings of the shock absorber and the extension pipe can greatly reduce the vibration of the exhaust pipe and extend its service life; the three-way catalytic converter, the particulate collector and the shock absorber can select appropriate models according to the specific situation; in a word, the present invention has the advantages of good cleaning effect, shock absorption and noise absorption, and long service life.

Claims

1. An automobile exhaust pipe, comprising a connector, characterized in that: A fixing ring is arranged in the connecting piece, a front exhaust pipe is connected to the lower part of the connecting piece, a three-way catalytic converter is arranged at the tail of the front exhaust pipe, a middle exhaust pipe is arranged at the rear of the three-way catalytic converter, a heat insulation layer and a sound-absorbing coating are arranged on the inner walls of the front exhaust pipe and the middle exhaust pipe from the inside to the outside, a particle collector is arranged at the tail of the middle exhaust pipe, a rear exhaust pipe is arranged at the rear of the particle collector, a sound-absorbing coating is arranged on the inner wall of the rear exhaust pipe, a muffler is arranged in the middle of the rear exhaust pipe, an exhaust port is arranged at the tail of the rear exhaust pipe, a filter screen is arranged on the inner side of the exhaust port, a shock absorber is arranged below the three-way catalytic converter and above the particle collector, and the shock absorber is connected to an extension pipe, and the extension pipe is attached to the surface of the middle exhaust pipe, the particle collector, the rear exhaust pipe and the muffler; The fixing ring is made of perfluoroether rubber, the heat insulation layer is made of nano silicon dioxide and lanthanum hexaboride, which is a good energy-saving nano-microporous heat insulation material, and the sound-absorbing coating is an acrylic resin coating; the filter net is a capsule with an adsorption layer arranged inside.

2. An automobile exhaust pipe as claimed in claim 1, characterized in that: The catalyst for the redox reaction in the three-way catalytic converter is Pt-Rh.

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