CN219176426U

CN219176426U - Three-way catalyst assembly, engine assembly and vehicle

Info

Publication number: CN219176426U
Application number: CN202320315200.0U
Authority: CN
Inventors: 刘涓; 王红; 郑素芳; 赵勇
Original assignee: Chongqing Changan Automobile Co Ltd
Current assignee: Chongqing Changan Automobile Co Ltd
Priority date: 2023-02-27
Filing date: 2023-02-27
Publication date: 2023-06-13
Anticipated expiration: 2033-02-27

Abstract

The utility model discloses a three-way catalyst assembly, an engine assembly and a vehicle, which comprise a three-way catalyst body, wherein the three-way catalyst body comprises a cylinder, a TWC carrier and a GPF carrier, wherein the TWC carrier and the GPF carrier are packaged in the cylinder, the TWC carrier is close to an air inlet cone end of the cylinder, the GPF carrier is close to an air outlet cone end of the cylinder, the three-way catalyst body is fixed on an engine crankcase, a mounting plate is fixed on a front housing of the engine crankcase, a differential pressure sensor is fixed on the side surface of the mounting plate, which is far away from the engine crankcase, a first measuring end of the differential pressure sensor is connected with the cylinder corresponding to the air inlet end of the GPF carrier through a pipeline, and a second measuring end of the differential pressure sensor is connected with the cylinder corresponding to the air outlet end of the GPF carrier through a pipeline. The method is beneficial to the regeneration of GPF carriers, realizes the virtuous cycle of trapping, regenerating and trapping, can reduce the heat damage risk of the differential pressure sensor and prolong the service life of the differential pressure sensor.

Description

Three-way catalyst assembly, engine assembly and vehicle

Technical Field

The utility model relates to the field of supercharged gasoline engine exhaust systems, in particular to a three-way catalyst assembly, an engine assembly and a vehicle.

Background

Emission regulations place more stringent demands on gasoline vehicle particulate emissions, with a 33% drop in particulate matter mass limit (PM). The GPF is a wall-flow type particle capturing device, exhaust is discharged from the GPF carrier through the porous wall surface to the adjacent pore channels, and particles are adsorbed and retained in the pore channels, so that the discharge of the particles is reduced. Although GPF can effectively trap particulate matters in exhaust gas, exhaust back pressure increases with the increase of trapped particulate matters, and power performance and economy of an automobile are affected. Therefore, when the particles in the GPF are accumulated to a certain degree, the particles in the GPF are required to be oxidized and combusted by adjusting the running condition of the engine, namely the GPF is regenerated, the particles in the GPF are removed, and the GPF is required to be regenerated to reach a certain temperature.

In order to reduce the emission of particulate matters of the gasoline engine, GPF is added to an exhaust system, so that the GPF becomes a mainstream technical route of each large vehicle enterprise. Because GPF is integrated on the exhaust cold end muffler and only occupies the channel space in the lower vehicle body, the arrangement is relatively easy, and the structure is the preferred arrangement form of a main engine factory, such as the structures shown in the patent CN202120619016.6 and the patent CN202021698083.3, but the rear-mounted GPF is far away from the exhaust, the GPF ignition temperature is not easy to reach, and the problems of easy carbon deposition, high regeneration frequency, difficult passive regeneration and the like exist. Therefore, the main engine plant also starts to study the feasibility of tightly coupling the GPF and the three-way catalyst to be arranged at the hot end, as shown in the structure of patent CN201811535799.9, the structure is characterized in that the differential pressure sensor connected with the differential pressure pipe is arranged above the exhaust outlet and directly contacted with the heat source, so that the risk of heat damage is high, the service life of the sensor is influenced, the sensor position is taken as the highest point of the engine, the height of the engine is increased, and the arrangement of the engine at the engine room is not facilitated.

Disclosure of Invention

The utility model aims to provide a three-way catalyst assembly, an engine assembly and a vehicle, which are beneficial to the regeneration of GPF carriers, realize the virtuous circle of trapping, regenerating and trapping, reduce the heat damage risk of a differential pressure sensor and prolong the service life of the differential pressure sensor.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides a three way catalyst converter subassembly, includes the three way catalyst converter body, the three way catalyst converter body includes the barrel and encapsulates TWC carrier and GPF carrier in the barrel, TWC carrier is close to the inlet cone end of barrel, GPF carrier is close to the cone end of giving vent to anger of barrel, the three way catalyst converter body is fixed in on the engine crankcase, be fixed with the mounting panel on the preceding housing of engine crankcase, be fixed with differential pressure sensor on the side that the mounting panel deviates from the engine crankcase, differential pressure sensor's first measurement end corresponds the barrel through pipeline and GPF carrier inlet end and is connected, differential pressure sensor's second measurement end corresponds the barrel through pipeline and GPF carrier outlet end and is connected.

Further, the pipeline comprises a hose and a hard tube, wherein the first end of the hose is connected with the first measuring end or the second measuring end of the differential pressure sensor, the second end of the hose is connected with the first end of the hard tube, and the second end of the hard tube is connected with the cylinder corresponding to the air inlet end of the GPF carrier or the cylinder corresponding to the air outlet end of the GPF carrier.

Further, the device also comprises a front oxygen sensor connected with the cylinder corresponding to the air inlet end of the TWC carrier and a rear oxygen sensor connected with the cylinder corresponding to the air outlet end of the TWC carrier, and a first clamp for fixing the front oxygen sensor wire harness and the rear oxygen sensor wire harness is arranged on the mounting plate.

Further, the temperature sensor is connected with the region between the TWC carrier and the GPF carrier, and a second clamp for fixing a wire harness of the temperature sensor is arranged on the mounting plate.

Further, the distance between the lower edge of the mounting plate and the lower edge of the differential pressure sensor is not less than 18mm.

An engine assembly comprising a three-way catalyst assembly according to the present utility model.

A vehicle comprising the engine assembly of the present utility model.

The utility model has the beneficial effects that:

1. according to the utility model, the TWC carrier and the GPF carrier are packaged in the cylinder of the three-way catalyst body, and the three-way catalyst body is fixed on the engine crankcase, so that the GPF carrier is arranged close to a high-temperature heat source, namely the engine crankcase, the ignition temperature of the catalyst is easier to reach, the regeneration of the GPF carrier is facilitated, and the virtuous cycle of trapping, regenerating and trapping is realized.

2. According to the utility model, the differential pressure sensor is fixedly arranged on the side surface of the mounting plate, which is away from the crankcase of the engine, so that the differential pressure sensor is prevented from being directly exposed at the inlet of the high-temperature heat source, the heat damage risk is effectively reduced, and the service life of the differential pressure sensor is further prolonged. Meanwhile, the differential pressure sensor is arranged without exceeding the original size boundary of the engine and affecting the arrangement of the engine in the engine room.

Drawings

FIG. 1 is a schematic illustration of a three-way catalyst assembly arrangement according to the present utility model;

fig. 2 is a schematic structural view of the cylinder according to the present utility model.

In the figure, 1-cylinder, 101-air inlet cone, 102-air outlet cone, 103-first connecting flange, 104-second connecting flange, 2-engine crankcase, 3-front cover shell, 4-mounting plate, 5-differential pressure sensor, 6-front differential pressure sensor metal tube mounting seat, 7-rear differential pressure sensor metal tube mounting seat, 8-front oxygen sensor, 9-rear oxygen sensor, 10-temperature sensor, 11-hose, 12-hard tube, 13-first clip, 14-second clip, 15-front oxygen sensor mounting seat, 16-rear oxygen sensor mounting seat and 17-temperature sensor mounting seat.

Detailed Description

Further advantages and effects of the present utility model will become readily apparent to those skilled in the art from the disclosure herein, by referring to the accompanying drawings and the preferred embodiments. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be understood that the preferred embodiments are presented by way of illustration only and not by way of limitation.

It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present utility model by way of illustration, and only the components related to the present utility model are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.

Referring to fig. 1 and 2, the three-way catalyst assembly shown comprises a three-way catalyst body comprising a barrel 1 and a TWC carrier and a GPF carrier encapsulated in the barrel 1, wherein the TWC carrier is close to the inlet cone 101 end of the barrel 1, and the GPF carrier is close to the outlet cone 102 end of the barrel 1. The three-way catalyst body is fixed on the engine crankcase 2, so that the GPF carrier in the cylinder body 1 is arranged close to a high-temperature heat source, namely the engine crankcase 2, the light-off temperature of the catalyst is easier to reach, the regeneration of the GPF carrier is facilitated, and the virtuous circle of trapping-regenerating-trapping is realized.

The air inlet cone 101 end of the cylinder body 1 is connected with a first connecting flange 103, and the first connecting flange 103 is connected with the supercharger through bolts. The end of the air outlet cone 102 of the cylinder body 1 is connected with a second connecting flange 104, and the second connecting flange 104 is connected with downstream parts.

The front housing 3 of the engine crankcase 2 is fixedly provided with a mounting plate 4, the side surface of the mounting plate 4, which is away from the engine crankcase 2, is fixedly provided with a differential pressure sensor 5, a first measuring end of the differential pressure sensor 5 is connected with the cylinder 1 corresponding to the GPF carrier air inlet end through a pipeline, and a second measuring end of the differential pressure sensor 5 is connected with the cylinder corresponding to the GPF carrier air outlet end through a pipeline. The pipeline comprises a hose 11 and a hard tube 12, wherein a first end of the hose 11 is connected with a first measuring end or a second measuring end of the differential pressure sensor 5, a second end of the hose 11 is connected with a first end of the hard tube 12, and a second end of the hard tube 12 is connected with a cylinder 1 corresponding to a GPF carrier air inlet end or a cylinder 1 corresponding to a GPF carrier air outlet end.

The mounting plate 4 is connected with the engine crankcase 2 through bolts, and is convenient and quick to assemble and disassemble and good in connection stability.

In order to detect the oxygen content of the front end and the rear end of the TWC carrier respectively, the three-way catalyst assembly further comprises a front oxygen sensor 8 connected with the cylinder 1 corresponding to the air inlet end of the TWC carrier and a rear oxygen sensor 9 connected with the cylinder 1 corresponding to the air outlet end of the TWC carrier, and the mounting plate 4 is provided with a first clamp 13 for fixing the front oxygen sensor wire harness and the rear oxygen sensor wire harness.

The utility model further comprises a temperature sensor 10 connected to the region between the TWC carrier and the GPF carrier, the temperature sensor 10 being arranged to monitor the temperature of the rear end of the TWC carrier, the mounting plate being provided with a second clip 14 for securing a temperature sensor harness. The front oxygen sensor mounting seat 15 is arranged at the position, corresponding to the front end of the TWC carrier, of the barrel 1, the rear oxygen sensor mounting seat 16, the front differential pressure sensor metal tube mounting seat 6 and the temperature sensor mounting seat 17 are arranged on the barrel 1, corresponding to the region between the TWC carrier and the GPF carrier, and the rear differential pressure sensor metal tube mounting seat 7 is arranged at the position, corresponding to the rear end of the GPF carrier, of the barrel 1. The front oxygen sensor 8 is fixedly arranged on the front oxygen sensor mounting seat 15, the rear oxygen sensor 9 is fixedly arranged on the rear oxygen sensor mounting seat 16, the hard tube 12 at the first measuring end of the differential pressure sensor 5 is fixedly arranged on the front differential pressure sensor metal tube mounting seat 6, the hard tube 12 at the second measuring end of the differential pressure sensor 5 is fixedly arranged on the rear differential pressure sensor metal tube mounting seat 7, and the temperature sensor 10 is fixedly arranged on the temperature sensor mounting seat 17.

In order to better block the heat source and prevent the differential pressure sensor 5 from overheating, the distance between the lower edge of the mounting plate 4 and the lower edge of the differential pressure sensor 5 is set to be not less than 18mm. Through fixedly arranging the differential pressure sensor 5 on the side of the mounting plate 4, which is away from the engine crankcase 2, the direct exposure of the differential pressure sensor 5 to the inlet of the high-temperature heat source is avoided, the risk of heat damage is effectively reduced, and the service life of the differential pressure sensor 5 is further prolonged. Meanwhile, the differential pressure sensor 5 is arranged without exceeding the original size boundary of the engine and affecting the arrangement of the engine in the engine room.

In a second embodiment, an engine assembly includes a three-way catalyst assembly according to the first embodiment of the present utility model.

In a third embodiment, a vehicle includes an engine assembly according to the second embodiment of the present utility model.

The above embodiments are merely preferred embodiments for fully explaining the present utility model, and the scope of the present utility model is not limited thereto. Equivalent substitutions and modifications will occur to those skilled in the art based on the present utility model, and are intended to be within the scope of the present utility model.

Claims

1. The utility model provides a three way catalyst converter subassembly, includes three way catalyst converter body, three way catalyst converter body includes barrel (1) and encapsulation TWC carrier and GPF carrier in barrel (1), TWC carrier is close to inlet cone (101) end of barrel (1), GPF carrier is close to outlet cone (102) end of barrel (1), its characterized in that: the three-way catalyst body is fixed in on engine crankcase (2), be fixed with mounting panel (4) on preceding housing (3) of engine crankcase (2), be fixed with differential pressure sensor (5) on the side that mounting panel (4) deviate from engine crankcase (2), differential pressure sensor (5) first measuring end corresponds the barrel through pipeline and GPF carrier inlet end and is connected, and differential pressure sensor (5) second measuring end corresponds the barrel through pipeline and GPF carrier outlet end and is connected.

2. The three-way catalyst assembly of claim 1, wherein: the pipeline comprises a hose (11) and a hard pipe (12), wherein the first end of the hose (11) is connected with the first measuring end or the second measuring end of the differential pressure sensor (5), the second end of the hose (11) is connected with the first end of the hard pipe (12), and the second end of the hard pipe (12) is connected with the cylinder corresponding to the GPF carrier air inlet end or the cylinder corresponding to the GPF carrier air outlet end.

3. The three-way catalyst assembly according to claim 1 or 2, characterized in that: the device further comprises a front oxygen sensor (8) connected with the cylinder corresponding to the air inlet end of the TWC carrier and a rear oxygen sensor (9) connected with the cylinder corresponding to the air outlet end of the TWC carrier, and a first clamp (13) used for fixing the front oxygen sensor wire harness and the rear oxygen sensor wire harness is arranged on the mounting plate (4).

4. The three-way catalyst assembly according to claim 1 or 2, characterized in that: the temperature sensor further comprises a temperature sensor (10) connected with the region between the TWC carrier and the GPF carrier, and a second clamp (14) for fixing the temperature sensor wire harness is arranged on the mounting plate.

5. The three-way catalyst assembly according to claim 1 or 2, characterized in that: the distance between the lower edge of the mounting plate (4) and the lower edge of the differential pressure sensor (5) is not less than 18mm.

6. An engine assembly, characterized in that: comprising a three-way catalyst assembly according to any one of claims 1 to 5.

7. A vehicle, characterized in that: comprising the engine assembly of claim 6.