CN220395805U

CN220395805U - Ternary catalyst

Info

Publication number: CN220395805U
Application number: CN202322187450.3U
Authority: CN
Inventors: 周勇; 葛亮
Original assignee: Chongqing Changan Automobile Co Ltd
Current assignee: Chongqing Changan Automobile Co Ltd
Priority date: 2023-08-15
Filing date: 2023-08-15
Publication date: 2024-01-26
Anticipated expiration: 2033-08-15

Abstract

The utility model belongs to the technical field of three-way catalytic converter equipment, and particularly relates to a three-way catalytic converter. The catalytic device comprises a main body shell, wherein an air inlet flange assembly and an air inlet end cone assembly are sequentially arranged above the main body shell, a catalytic assembly is arranged in the main body shell, an air outlet end cone assembly and a bracket assembly are sequentially arranged below the main body shell, and the air inlet end cone assembly is connected with a cooling assembly; the cooling assembly comprises an EGR cooler, an air inlet end of the EGR cooler is connected with the air inlet end cone assembly, and an air outlet end of the EGR cooler is communicated with a cylinder of the automobile engine; the EGR cooler is connected with a water inlet pipe and a water outlet pipe which are respectively used for being communicated with a cooling loop of the automobile engine. The purpose is that: the exhaust gas is sucked into the engine to be fully combusted before catalysis, the gas taking position is closer to the gas outlet end of the engine, the gas taking pipeline is shorter, the gas taking temperature is higher, the pre-catalysis gas taking belongs to the gas taking in the high-pressure area, and the gas taking flow of the EGR cooler is larger, so that the purification treatment of the exhaust gas is more facilitated.

Description

Ternary catalyst

Technical Field

The utility model belongs to the technical field of three-way catalytic converter equipment, and particularly relates to a three-way catalytic converter.

Background

For an engine using EGR technology, it is necessary to take gas from a three-way catalyst, and an exhaust gas recirculation circuit is formed in an EGR system of the engine. Therefore, the three-way catalyst tends to be very complex in structure, heavy in weight, and high in exhaust back pressure.

Chinese patent CN209067317U discloses a three-way catalyst assembly with EGR circulation pipe, including inlet pipe, inlet end cone, three-way catalyst casing, outlet end cone, the pipeline of giving vent to anger of end to end in proper order, the end connection of inlet pipe has inlet flange, the end connection of outlet pipe has outlet flange, be equipped with on the outlet pipe and be equipped with the communicating EGR connecting line with it. The structure of the three-way catalyst with the EGR is simplified to a certain extent, but the adopted three-way catalyst is used for taking gas after catalysis, the temperature of the obtained gas flow is low, the pressure of the area for taking the gas flow is small, and the gas flow of the EGR is small, so that the purification treatment of the waste gas is not facilitated.

Disclosure of Invention

The purpose of the utility model is that: the three-way catalyst is used for solving the problems that the temperature of the acquired air flow is low, the pressure of the area for acquiring the air flow is low, the air flow of EGR is low and the purification treatment of waste gas is not facilitated.

In order to achieve the technical purpose, the utility model adopts the following technical scheme:

the three-way catalyst comprises a main body shell, wherein an air inlet end cone assembly and an air inlet flange assembly are sequentially arranged above the main body shell, a catalyst assembly is arranged in the main body shell, an air outlet end cone assembly is arranged below the main body shell, and the air inlet end cone assembly is connected with a cooling assembly;

the cooling assembly comprises an EGR cooler, the air inlet end of the EGR cooler is connected with an air inlet end cone assembly, the air outlet end of the EGR cooler is communicated with a cylinder of an automobile engine, the EGR cooler is connected with a water inlet pipe and a water outlet pipe, and the water inlet pipe and the water outlet pipe are communicated with a cooling loop of the automobile engine.

Preferably, the air inlet flange assembly comprises an air inlet flange plate, and the air inlet flange plate is connected with the air inlet end cone assembly. The exhaust gas exhausted by the engine is conveniently collected by the arrangement.

Preferably, the air inlet end cone assembly comprises an air inlet end cone fixedly connected above the main body shell, an air inlet and a connecting port are formed in the side wall of the air inlet end cone, the air inlet flange plate is fixedly connected to the air inlet, an air taking assembly is arranged at the connecting port, and the air inlet end of the EGR cooler is connected with the air taking assembly; the front oxygen sensor seat is fixedly connected to the outer wall of the air inlet end cone. The arrangement is convenient to cool part of waste gas and send the cooled part of waste gas back to the engine for full combustion, thereby reducing pollution.

Preferably, the gas taking assembly comprises a reducing pipe, a corrugated pipe and a gas taking flange plate, wherein the reducing pipe is fixedly connected with the connecting port, the corrugated pipe is fixedly connected with the reducing pipe, the gas taking flange plate is fixedly connected with the corrugated pipe, and the gas taking flange plate is fixedly connected with the gas inlet end of the EGR cooler. The arrangement is convenient for the EGR cooler to take air.

Preferably, the catalytic assembly includes a mat disposed on an inner wall of the body housing and a three-way catalyst disposed within the body housing. The arrangement is beneficial to purifying the burnt waste gas.

Preferably, the air outlet end cone assembly comprises an air outlet end cone, the air outlet end cone is fixedly connected below the main body shell, and a rear oxygen sensor seat is fixedly connected on the air outlet end cone.

Preferably, the air outlet end cone is provided with an air outlet, and the air outlet is fixedly connected with an air outlet flange plate. The arrangement is convenient for discharging the purified waste gas.

Preferably, a bracket assembly is arranged below the air outlet end cone assembly, the bracket assembly comprises a first bracket and a second bracket, the first bracket is fixedly connected to the outer wall of the air outlet end cone, the second bracket is fixedly connected to the first bracket, and the second bracket is fixedly connected with the automobile engine. The setting like this, through split type first support and second support, in the installation, after installing the automobile engine with the second support, readjusting the relative position between second support and the first support, fixed three way catalyst converter, be favorable to reducing the installation error that three way catalyst converter installed on the engine.

Preferably, the air inlet flange plate is fixedly connected with a first heat shield bracket; a second heat shield bracket is fixedly connected to the air outlet end cone; a third heat shield bracket is fixedly connected to the outer wall of the main body shell; and a fourth heat shield bracket is fixedly connected on the air outlet flange plate. The heat shield is favorable for installation, heat emitted by the three-way catalyst during working is conveniently blocked, and the service life of other equipment on the automobile engine is prolonged.

The utility model adopting the technical scheme has the following advantages:

1. in the scheme, the air inlet end of the EGR cooler is arranged on the air inlet end cone, waste gas is sucked back into the engine for full combustion before catalysis, the air taking position is closer to the air outlet end of the engine, the air taking pipeline is shorter, the air taking temperature is higher, the pre-catalysis air taking belongs to the air taking in a high-pressure area, the air taking quantity of the EGR cooler is larger, and the purification treatment of the waste gas is facilitated;

2. in this scheme, EGR cooler communicates with automobile engine's cooling circuit through inlet tube and outlet pipe, and cooling efficiency is higher, more is favorable to the purification treatment of waste gas.

Drawings

The utility model can be further illustrated by means of non-limiting examples given in the accompanying drawings;

FIG. 1 is a schematic diagram of a three-way catalyst embodiment of the present utility model;

FIG. 2 is a schematic view of an inlet flange assembly of an embodiment of a three-way catalyst according to the present utility model;

FIG. 3 is a schematic view of the structure of an inlet end cone assembly of an embodiment of a three-way catalyst according to the present utility model;

FIG. 4 is a schematic diagram of a gas extraction assembly according to an embodiment of the three-way catalyst of the present utility model;

FIG. 5 is a schematic diagram of an EGR cooler of an embodiment of a three-way catalyst of the present utility model;

FIG. 6 is a schematic view of the structure of a body housing of an embodiment of a three-way catalyst according to the present utility model;

FIG. 7 is a cross-sectional view at A-A of FIG. 6;

FIG. 8 is a schematic diagram of an outlet end cone assembly of an embodiment of a three-way catalyst according to the present utility model;

FIG. 9 is a schematic structural view of a support assembly of an embodiment of a three-way catalyst according to the present utility model;

FIG. 10 is a schematic view of the structure of an outlet flange of an embodiment of a three-way catalyst according to the present utility model;

the main reference numerals are as follows:

1. a main body case; 11. an air inlet flange assembly; 111. an air inlet flange plate; 112. a first heat shield support; 12. an air inlet end cone assembly; 121. a left half shell; 122. a right half shell; 123. a front oxygen sensor mount; 124. an air inlet; 125. a connection port; 13. an air taking component; 131. a reducer pipe; 132. a bellows; 133. taking an air-taking flange plate; 141. a gasket; 142. a three-way catalyst; 143. a second heat shield support; 15. an air outlet end cone assembly; 151. a left housing; 152. a right housing; 153. a rear oxygen sensor mount; 154. a third heat shield mount; 16. a bracket assembly; 161. a first bracket; 162. a second bracket; 171. an air outlet flange; 172. a fourth heat shield mount; 2. a cooling assembly; 21. a water inlet pipe; 22. and a water outlet pipe.

Detailed Description

The present utility model will be described in detail below with reference to the drawings and the specific embodiments, wherein like or similar parts are designated by the same reference numerals throughout the drawings or the description, and implementations not shown or described in the drawings are in a form well known to those of ordinary skill in the art. In addition, directional terms such as "upper", "lower", "top", "bottom", "left", "right", "front", "rear", etc. in the embodiments are merely directions with reference to the drawings, and are not intended to limit the scope of the present utility model.

As shown in fig. 1 to 10, the three-way catalyst of the utility model comprises a main body shell 1, wherein an air inlet end cone assembly 12 and an air inlet flange assembly 11 are sequentially arranged above the main body shell 1, a catalyst assembly is arranged in the main body shell 1, an air outlet end cone assembly 15 and a bracket assembly 16 are sequentially arranged below the main body shell 1, and the air inlet end cone assembly 12 is connected with a cooling assembly 2.

In this embodiment, the air inlet flange assembly 11 includes an air inlet flange 111, the air inlet flange 111 is fixedly connected with an air inlet end cone of the air inlet end cone assembly, and a first heat shield bracket 112 is fixedly installed on the air inlet flange 111 through screws. Wherein, the material of the inlet flange 111 is carbon steel, the thickness is 10mm, and the stamping and machining type. The material of the first heat shield bracket 112 is stainless steel, the thickness is 2mm, the first heat shield bracket is formed by stamping and welded on the air inlet flange 111.

The air inlet end cone assembly 12 comprises an air inlet end cone, the air inlet end cone is welded above the main body shell 1, the air inlet end cone comprises a left half shell 121 and a right half shell 122, a front oxygen sensor seat 123 is fixedly connected on the outer wall of the air inlet end cone, and a front oxygen sensor is convenient to install. Wherein, the left half shell 121 and the right half shell 122 are made of stainless steel, have the thickness of 2mm, and are welded together after being formed by stamping. The front oxygen sensor seat 123 is made of stainless steel, has a specification of M18, and is welded to the left half shell 121 after machining.

In this embodiment, an air inlet 124 and a connection port 125 are formed on the side wall of the air inlet end cone, the air inlet flange 111 is screwed to the air inlet 124, the cooling assembly 2 comprises an EGR cooler, the air taking assembly 13 is arranged at the connection port 125 of the air inlet end cone, the air inlet end of the EGR cooler is connected with the connection port 125 of the air inlet end cone through the air taking assembly 13, and the air outlet end of the EGR cooler is communicated with a cylinder of an automobile engine. The outlet end of the EGR cooler is provided with an EGR valve.

The EGR cooler is connected with a water inlet pipe 21 and a water outlet pipe 22, the water inlet pipe 21 and the water outlet pipe 22 being respectively intended to communicate with the cooling circuit of the vehicle engine.

The air inlet end of the EGR cooler is arranged on the air inlet end cone, waste gas is sucked into the engine before catalysis for full combustion, the air taking position is closer to the air outlet end of the engine, the air taking pipeline is shorter, the air taking temperature is higher, the pre-catalysis air taking belongs to the air taking in a high-pressure area, the air taking quantity of the EGR is larger, and the purification treatment of the waste gas is more facilitated. Meanwhile, the EGR cooler is communicated with a cooling circuit of the automobile engine through the water inlet pipe 21 and the water outlet pipe 22, so that the cooling efficiency is higher.

In this embodiment, the gas extraction assembly 13 includes a reducer 131, a bellows 132, and a gas extraction flange 133, where the reducer 131 is made of stainless steel, and has a thickness of 1.5mm, and the pipe end is formed and welded at the connection port 125. The corrugated tube 132 is made of stainless steel and has a thickness of 0.5mm, and is welded to the reducer 131 after water expansion molding, with 9 corrugations. The gas taking flange 133 is made of stainless steel, has the thickness of 8mm, is welded on the corrugated pipe 132 after being stamped and machined, is provided with 2 mounting holes phi 8mm, and is in threaded connection with the gas inlet end of the EGR cooler.

In this embodiment, the catalytic assembly comprises a mat 141 and a three-way catalyst 142, the main housing is made of stainless steel, and the gbd package is formed with a thickness of 2 mm. The mat 141 has a compressed thickness of 3.5mm and is made of polycrystalline fiber, one side of which is used for wrapping the three-way catalyst 142, and the other side of which is closely attached to the main casing. The three-way catalyst 142 has a porous honeycomb ultra-thin wall structure, is made of a cordierite ceramic carrier, is wrapped by a liner 141, and is plugged into the main casing. The outer wall of the main body shell 1 is welded with a third heat shield bracket 154, the third heat shield bracket 154 is made of stainless steel, the thickness is 2mm, the number of the third heat shield brackets is 2, and the third heat shield brackets are respectively welded on the outer surface of the main body shell and are symmetrically distributed.

In this embodiment, the air outlet end cone assembly 15 includes an air outlet end cone, the air outlet end cone is fixedly connected under the main body shell 1, the air outlet end cone includes a left shell 151 and a right shell 152, the materials of the left shell 151 and the right shell 152 are stainless steel, the thickness is 2mm, and the materials are welded together after being formed by punching. The left shell 151 is welded with a rear oxygen sensor seat 153, the rear oxygen sensor seat 153 is made of stainless steel, the specification is M18, and the rear oxygen sensor seat 153 is welded on the left shell 151 after machining. The second heat shield supports 143 are welded on the air outlet end cone, the number of the second heat shield supports 143 is two, stainless steel is adopted, the thickness is 2mm, the air outlet end cone is formed by stamping, and the air outlet end cone is symmetrically arranged on the left shell 151 and the right shell 152.

The bracket assembly 16 comprises a first bracket 161 and a second bracket 162, wherein the first bracket 161 is fixedly connected to the outer wall of the air outlet end cone, the second bracket 162 is fixedly arranged on the first bracket 161 through bolts, and the second bracket 162 is fixedly connected with the automobile engine through bolts. Wherein, the material of first support 161 and second support 162 is stainless steel, and thickness is 4mm, stamping forming. Through split type first support and second support, in the installation, after installing automobile engine with the second support, readjusting the relative position between second support and the first support, fix three way catalyst converter, be favorable to reducing the installation error that three way catalyst converter installed on the engine.

In this embodiment, the gas outlet end cone is provided with a gas outlet, the gas outlet is fixedly connected with a gas outlet flange 171, and a fourth heat shield bracket 172 is welded on the gas outlet flange 171.

It will be appreciated that the first heat shield support 112, the second heat shield support 143, the third heat shield support 154 and the fourth heat shield support 172 in this embodiment are all used for installing heat shields, so as to reduce heat radiation caused by the three-way catalyst to other parts of the automobile engine, and prolong the service life of the other parts of the automobile engine.

Working principle: after the exhaust gas in the engine sequentially enters the air inlet flange assembly 11 and the air inlet end cone assembly 12, a part of the exhaust gas enters the main body shell 1 and is discharged out of the vehicle after being purified. The other part of the waste gas enters the gas taking component 13 and returns to the cylinder of the engine through the EGR cooler to form an EGR pre-catalytic gas taking loop to take part in combustion again, so that the emission is reduced. And the cooling water from the engine water pump forms a cooling water loop on the EGR cooler, so that part of heat of waste gas in the EGR cooler is taken away, the waste gas is cooled, the combustion temperature is reduced, and emission pollutants are reduced.

The three-way catalyst provided by the utility model is described in detail above. The description of the specific embodiments is only intended to aid in understanding the method of the present utility model and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.

Claims

1. A three-way catalyst, characterized by: the catalytic device comprises a main body shell (1), wherein an air inlet end cone assembly (12) and an air inlet flange assembly (11) are sequentially arranged above the main body shell (1), a catalytic assembly is arranged in the main body shell (1), an air outlet end cone assembly (15) is arranged below the main body shell (1), and the air inlet end cone assembly (12) is connected with a cooling assembly (2);

the cooling assembly (2) comprises an EGR cooler, an air inlet end of the EGR cooler is connected with the air inlet end cone assembly (12), and an air outlet end of the EGR cooler is communicated with a cylinder of the automobile engine; the EGR cooler is connected with a water inlet pipe (21) and a water outlet pipe (22), and the water inlet pipe (21) and the water outlet pipe (22) are respectively used for being communicated with a cooling loop of the automobile engine.

2. A three-way catalyst according to claim 1, characterized in that: the air inlet flange assembly (11) comprises an air inlet flange plate (111), and the air inlet flange plate (111) is connected with the air inlet end cone assembly (12).

3. A three-way catalyst according to claim 2, characterized in that: the air inlet end cone assembly (12) comprises an air inlet end cone, the air inlet end cone is fixedly connected above the main body shell (1), an air inlet (124) and a connecting port (125) are formed in the side wall of the air inlet end cone, the air inlet flange plate (111) is fixedly connected with the air inlet (124), an air taking assembly (13) is arranged at the connecting port (125), the air inlet end of the EGR cooler is connected with the air taking assembly (13), and a front oxygen sensor seat (123) is fixedly connected on the outer wall of the air inlet end cone.

4. A three-way catalyst according to claim 3, characterized in that: the gas taking assembly (13) comprises a reducing pipe (131), a corrugated pipe (132) and a gas taking flange plate (133), the reducing pipe (131) is fixedly connected with the connecting port, the corrugated pipe (132) is fixedly connected with the reducing pipe (131), the gas taking flange plate (133) is fixedly connected with the corrugated pipe (132), and the gas taking flange plate (133) is fixedly connected with the gas inlet end of the EGR cooler.

5. A three-way catalyst according to claim 2, characterized in that: the catalytic assembly comprises a gasket (141) and a three-way catalyst (142), wherein the gasket (141) is arranged on the inner wall of the main body shell (1), and the three-way catalyst (142) is arranged in the main body shell (1).

6. A three-way catalyst according to claim 5, wherein: the air outlet end cone assembly (15) comprises an air outlet end cone, the air outlet end cone is fixedly connected to the lower portion of the main body shell (1), and a rear oxygen sensor seat (153) is fixedly connected to the air outlet end cone.

7. A three-way catalyst according to claim 6, wherein: the air outlet end cone is provided with an air outlet, and the air outlet is fixedly connected with an air outlet flange plate (171).

8. A three-way catalyst according to claim 7, wherein: the utility model discloses a car engine, including end cone subassembly, the end cone subassembly that gives vent to anger, end cone subassembly below is provided with support subassembly (16), support subassembly (16) include first support (161) and second support (162), first support (161) rigid coupling is in on the outer wall of end cone gives vent to anger, second support (162) rigid coupling is in on first support (161), second support (162) with car engine fixed connection.

9. A three-way catalyst according to claim 7, wherein: a first heat shield bracket (112) is fixedly connected to the air inlet flange plate (111); a second heat shield bracket (143) is fixedly connected to the air outlet end cone; a third heat shield bracket (154) is fixedly connected to the outer wall of the main body shell (1); and a fourth heat shield bracket (172) is fixedly connected to the air outlet flange plate (171).