CN218862760U

CN218862760U - EGR cooling device, hybrid engine and vehicle

Info

Publication number: CN218862760U
Application number: CN202222959170.5U
Authority: CN
Inventors: 谢端勇; 姚博炜; 余立东; 陈永升; 梁玉萍
Original assignee: SAIC GM Wuling Automobile Co Ltd; Liuzhou Saike Technology Development Co Ltd
Current assignee: SAIC GM Wuling Automobile Co Ltd; Liuzhou Saike Technology Development Co Ltd
Priority date: 2022-11-04
Filing date: 2022-11-04
Publication date: 2023-04-14
Anticipated expiration: 2032-11-04

Abstract

The application discloses EGR cooling device, hybrid engine and vehicle, this EGR cooling device include intake pipe, three way catalyst converter, EGR cooler and outlet duct, the one end of intake pipe pass through the welded mode connect in the inlet end of EGR cooler, the other end of intake pipe connect in three way catalyst converter, the outlet duct connect in the end of giving vent to anger of EGR cooler. This application is through connecting the one end of intake pipe in the inlet end of EGR cooler with the welded mode, promptly, with the intake pipe integration on the EGR cooler to reduce the length of EGR pipe, reduced part and installation procedure, reduced and arranged the degree of difficulty, reduced sealed point, reduced and revealed the risk.

Description

EGR cooling device, hybrid engine and vehicle

Technical Field

The application relates to the technical field of engines and accessories thereof, in particular to an EGR cooling device, a hybrid engine comprising the same and a vehicle.

Background

The EGR cooler is an important component of the hybrid power engine and plays a role in cooling exhaust gas, introducing the exhaust gas into the engine to participate in combustion and reducing oil consumption.

But current EGR intake pipe is longer, and both ends need be connected with three way catalyst converter, EGR cooler through the flange respectively, and the process is many, and has increased part mould development, and is with high costs, need increase seal gasket for between EGR intake pipe and three way catalyst converter, between EGR intake pipe and the EGR cooler simultaneously, reveal the risk greatly.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problems in the prior art, the present application mainly aims to provide an EGR cooling device with less processes, reduced development of part molds, low cost and less leakage risk.

In order to achieve the above purpose, the following technical solutions are specifically adopted in the present application:

the application provides an EGR cooling device is applied to hybrid engine, EGR cooling device includes:

a three-way catalyst;

an EGR cooler;

one end of the air inlet pipe is connected to the air inlet end of the EGR cooler in a welding mode, and the other end of the air inlet pipe is connected to the three-way catalyst;

and the air outlet pipe is connected to the air outlet end of the EGR cooler.

In some embodiments, the intake pipe is connected to the three-way catalyst by a flange.

In some embodiments, the three-way catalyst includes a first portion and a second portion communicating with each other, and the intake pipe is connected to a position between the first portion and the second portion by a flange.

In some embodiments, the level of the EGR cooler is less than the level of the three-way catalyst.

In some embodiments, the EGR cooler further comprises a butterfly valve disposed at a junction of the EGR cooler and the outlet duct.

In some embodiments, the EGR cooler device further includes a first bracket attached to a side of the EGR cooler near the three-way catalyst, the first bracket being adapted to be connected to the hybrid engine.

In some embodiments, at least two of the first brackets are spaced apart on the same side of the EGR cooler.

In some embodiments, the EGR cooler device further includes a second bracket provided to the EGR cooler, and a differential pressure sensor mounted to the second bracket.

In some embodiments, the hybrid engine includes the EGR cooling device.

In some embodiments, the hybrid engine is mounted to the vehicle body.

The EGR cooling device of this application includes three way catalyst converter, EGR cooler, intake pipe and outlet duct, and the one end of intake pipe is connected in the inlet end of EGR cooler through the welded mode, and the other end of intake pipe is connected in three way catalyst converter, and the outlet duct is connected in the end of giving vent to anger of EGR cooler. This application is through connecting the one end of intake pipe in the inlet end of EGR cooler with welded mode, promptly, with the intake pipe integration on the EGR cooler to reduce the length of EGR pipe, reduced the process, also reduced part mould development, the cost is reduced, need not increase seal gasket for between EGR intake pipe and the EGR cooler simultaneously, has reduced and has revealed the risk.

Drawings

Fig. 1 is a schematic structural diagram of a prior art EGR cooling device according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of an EGR cooling device according to an embodiment of the present application.

Fig. 3 is a schematic view of a connection structure between an intake pipe and an EGR cooler according to an embodiment of the present application.

FIG. 4 is a schematic view of a connection structure of an intake pipe and a three-way catalyst according to an embodiment of the present application.

Fig. 5 is a schematic view of a butterfly valve mounting structure provided in the embodiment of the present application.

Fig. 6 is a schematic structural diagram of an EGR cooler according to an embodiment of the present application.

Reference numerals:

1. a supercharger; 2. an air outlet pipe; 3. a butterfly valve; 4. a first bracket; 5. an EGR cooler; 6. an air inlet pipe; 7. a three-way catalyst; 8. a second bracket; 9. a flange; 1', an air inlet pipe; 2', a flange; 3', a three-way catalyst; 4', an EGR cooler; 5', an exhaust pipe; 6', an air outlet pipe; 71. a first portion; 72. a second portion.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

In the description of the present application, unless explicitly stated or limited otherwise, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; unless specified or indicated otherwise, the term "plurality" means two or more, and the term "plurality" means two or more; the terms "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, integrally connected, or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the description of the present application, it should be understood that the terms "upper" and "lower" used in the description of the embodiments of the present application are used in a descriptive sense only and not for purposes of limitation. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.

The EGR cooler is an important component of the hybrid engine and plays a role in cooling exhaust gas, introducing the exhaust gas into the engine to participate in combustion and reducing oil consumption. Referring to fig. 1, in the conventional EGR cooling device, an inlet pipe 1' is connected to a three-way catalyst 3' and an EGR cooler 4' through flanges 2' respectively, so that exhaust gas generated by an automobile enters the three-way catalyst 3' to perform a catalytic reaction, then an EGR cooling structure takes gas from the rear end of the three-way catalyst 3', so that the gas enters the EGR cooler 4' through the inlet pipe 1', and is cooled in the EGR cooler 4' through heat exchange, during which water vapor bubbles generated are discharged into an expansion tank through an additional exhaust pipe 5', and the cooled gas enters a cylinder block through an outlet pipe 6 '.

Referring to fig. 2 and 3, fig. 2 is a schematic structural diagram of an EGR cooling device according to an embodiment of the present disclosure, and fig. 3 is a schematic structural diagram of a connection structure between an intake pipe and an EGR cooler according to an embodiment of the present disclosure. The EGR (Exhaust Gas recirculation) cooling device is applied to a hybrid engine, and specifically comprises a three-way catalyst 7, an air inlet pipe 6, an EGR cooler 5 and an air outlet pipe 2, wherein one end of the air inlet pipe 6 is connected to the air inlet end of the EGR cooler 5 in a welding mode, and the other end of the air inlet pipe 6 is connected to the three-way catalyst 7 through a flange 9. The inlet end of the outlet pipe 2 is connected to the outlet end of the EGR cooler 5, and the outlet end of the outlet pipe 2 is connected to the supercharger 1. During the running of the vehicle, the exhaust gas generated by the vehicle enters the three-way catalyst 7 for catalytic reaction, the gas after catalytic reaction enters the EGR cooler 5 through the gas inlet pipe 6 for cooling, and then is conveyed to the supercharger 1 through the gas outlet pipe 2 for supercharging.

This embodiment is through connecting the one end with intake pipe 6 in the welded mode in EGR cooler 5's inlet end, the other end of intake pipe 6 passes through flange 9 to be connected in three way catalyst converter 7, namely, integrate intake pipe 6 on EGR cooler 5, thereby can reduce the length of intake pipe 6, part and installation procedure have been reduced, the degree of difficulty has been arranged to the reduction, sealed point has been reduced (need not to set up sealed pad in intake pipe 6 and EGR cooler 5's junction), the risk of revealing has been reduced, make whole EGR cooling device more compact simultaneously, the gas pressure loss has been reduced.

Specifically, the bottom of the EGR cooler 5 is set to be a funnel-shaped opening, the shape and size of the funnel-shaped opening correspond to the shape and size of the air outlet end of the air inlet pipe 6, and when the EGR cooler is installed, the air outlet end of the air inlet pipe 6 and the funnel-shaped opening are fixed in a welding mode, so that the air inlet pipe 6 is hermetically connected with the EGR cooler 5.

Referring to fig. 2 and 4 simultaneously, fig. 4 is a schematic view of a connection structure of an air inlet pipe and a three-way catalyst according to an embodiment of the present application. The three-way catalyst 7 includes a first portion 71 and a second portion 72 that communicate with each other, and the second portion 72 is located above the first portion 71. Of these, the first part 71 of the three-way catalyst 7 is a catalyst for converting harmful gases in the exhaust gas into harmless carbon dioxide, water and nitrogen by oxidation and reduction. The second part 72 of the three-way catalyst 7 is a particle catcher, which is used for catching the particles in the exhaust gas, burning the particles after reaching a certain degree, and avoiding the particles polluting the air. The inlet pipe is connected to a location (or region) between the first and second portions by a flange. The present embodiment reduces the influence of soot on the heat exchange performance of the EGR cooler 5 by taking gas from the rear end of the first portion 71 of the three-way catalyst 7, and avoids the problem of insufficient EGR rate (the ratio of the amount of recirculated exhaust gas to the total amount of intake gas drawn into the cylinder) caused by low gas pressure due to taking gas from the rear end of the second portion 72.

In the prior art, the level of the EGR cooler 4 'is generally higher than that of the three-way catalyst 3', and since the water vapor generated by heat exchange through the coolant tends to flow to a high place, so that the water vapor is accumulated on the upper portion of the EGR cooler 4', the prior art needs to provide an exhaust pipe 5' on the EGR cooler 4 'to exhaust the water vapor generated during the cooling process through the exhaust pipe 5', and has a complicated structure and increased cost, as shown in fig. 1.

In this embodiment, the level of the EGR cooler 5 is less than the level of the three-way catalyst 7, and this embodiment reduces the level of the EGR cooler 5, thereby avoiding the EGR cooler 5 from becoming the high point of the EGR cooling device, so that the water vapor generated in the cooling process can be discharged along the water path through the EGR cooler 5, and the water vapor is not accumulated above the EGR cooler 5, therefore, an additional exhaust pipe is not needed, the number of parts is reduced, the structure is simple, and the cost is reduced.

Referring to fig. 2 and 5 simultaneously, fig. 5 is a schematic view of a butterfly valve mounting structure provided in an embodiment of the present application. This EGR cooling device still includes butterfly valve 3, and butterfly valve 3 sets up in the junction of EGR cooler 5 and outlet duct 2, controls the break-make of EGR cooler 5 and outlet duct 2 through butterfly valve 3. The valve of this embodiment through the break-make with control EGR cooler 5 and outlet duct 2 sets up to butterfly valve 3, has effectively reduced EGR cooling device's height, has reduced and has taken up the peripheral space of engine, and the butterfly valve loss of pressure is little simultaneously, can provide bigger surplus for EGR rate. Meanwhile, the flange 9 for connecting the air inlet pipe 6 and the three-way catalyst 7 adopts a casting structure, so that the turning radius of the pipeline is greatly reduced, the length of the pipeline is reduced, and the pressure loss of the air circuit can be effectively reduced.

Referring to fig. 6, fig. 6 is a schematic structural diagram of an EGR cooler according to an embodiment of the present application. EGR cooling device still includes first support 4, second support 8, differential pressure sensor and temperature sensor, and first support 4 is connected in EGR cooler 5 and is close to one side of three way catalyst converter 7, and has seted up the mounting hole on the first support 4, through mounting hole installation EGR cooler 5. The second bracket 8 is provided on the other side of the EGR cooler 5 opposite to the first bracket 4. The differential pressure sensor is installed in the second bracket 8, and the difference between the exhaust gas pressures at both ends of the butterfly valve 3 can be detected by the differential pressure sensor. A temperature sensor is integrated in the EGR cooler 5, by which the temperature of the exhaust gas entering the butterfly valve 3, i.e. the inlet gas temperature of the butterfly valve 3, can be detected. During assembly, bolts pass through the mounting holes in the first bracket 4 and are bolted to the hybrid engine body, so that the EGR cooler 5 is fixedly mounted on the engine body, and the mounting and after-market maintenance are simple.

In the present embodiment, at least two first brackets 4 are provided, and two first brackets 4 are disposed at the same side of the EGR cooler 5 at intervals, so that the connection structure between the EGR cooler 5 and the hybrid engine body is more stable, and the cost is reduced. It is understood that in other embodiments, two or three or more first brackets may be provided.

Among the prior art, EGR cooler 5 both sides all are equipped with first support 4, make one side of EGR cooler 5 install on the engine through first support 4, and the opposite side is installed on the derailleur through first support 4, but, owing to stride across engine and derailleur, dimensional tolerance is accumulative together more, can produce the part installation problem, and simultaneously, the derailleur casing needs the increase strength just can satisfy the installation requirement, has increased the cost.

The first bracket 4 of the present embodiment is provided with two, that is, the EGR cooler 5 is mounted on the engine body using a double-layered bracket, thereby increasing the mounting strength, making the entire EGR cooler device an engine body member, and avoiding the mounting problem caused by the accumulation of tolerance fixed to the transmission. Meanwhile, the differential pressure sensor bracket is integrated on the shell of the EGR cooler 5, so that the pipeline arrangement of the differential pressure sensor is fixed, the change of the differential pressure pipeline caused by different transmissions is avoided, and the number of parts is reduced.

Based on the above embodiments, embodiments of the present application further disclose a hybrid engine, which includes the EGR cooling device according to any of the above embodiments. The EGR cooler is mounted on the hybrid engine.

Correspondingly, the application also discloses a vehicle, which comprises a vehicle body and the hybrid engine of any one of the embodiments, wherein the hybrid engine is mounted on the vehicle body.

The above description is only for the preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An EGR cooling device applied to a hybrid engine is characterized by comprising:

a three-way catalyst;

an EGR cooler;

and the air outlet pipe is connected to the air outlet end of the EGR cooler.

2. The EGR cooling device according to claim 1, wherein the intake pipe is connected to the three-way catalyst through a flange.

3. The EGR cooler according to claim 2, wherein the three-way catalyst includes a first portion and a second portion that communicate with each other, and the intake pipe is connected to a position between the first portion and the second portion by a flange.

4. The EGR cooler device according to claim 1, characterized in that a level of the EGR cooler is smaller than a level of the three-way catalyst.

5. The EGR cooler of claim 1, further comprising a butterfly valve disposed at a junction of the EGR cooler and the outlet duct.

6. The EGR cooler of claim 1 further comprising a first bracket attached to a side of the EGR cooler near the three-way catalyst, the first bracket adapted to be attached to the hybrid engine.

7. The EGR cooler of claim 6 wherein said first brackets are provided in at least two, and said two first brackets are spaced apart on the same side of said EGR cooler.

8. The EGR cooler according to any one of claims 1 to 7, characterized in that the EGR cooler further comprises a second bracket provided to the EGR cooler, and a differential pressure sensor attached to the second bracket.

9. A hybrid engine characterized by comprising the EGR cooling device according to any one of claims 1 to 8.

10. A vehicle characterized by comprising a vehicle body and the hybrid engine of claim 9 mounted to the vehicle body.