WO2014026538A1

WO2014026538A1 - Dual exhaust gas recirculation cooling device

Info

Publication number: WO2014026538A1
Application number: PCT/CN2013/080351
Authority: WO
Inventors: 王玉军; 段昭; 李祎旻; 刘正东; 曹震; 逄小凤
Original assignee: 上海汽车集团股份有限公司
Priority date: 2012-08-15
Filing date: 2013-07-29
Publication date: 2014-02-20
Also published as: CN103590928A; GB2520647A; GB201502089D0; CN103590928B; GB2520647B

Abstract

Disclosed is a dual exhaust gas recirculation cooling device, comprising a low-pressure end valve seat having a low-pressure end exhaust gas inlet and outlet, a cooler detachably fixed with the low-pressure end valve seat, a low-pressure end exhaust gas recirculation valve detachably fixed with the low-pressure end valve seat, a high-pressure end valve seat detachably fixed with the cooler and having a high-pressure end exhaust gas inlet and outlet, and a high-pressure end exhaust gas recirculation valve detachably fixed with the high-pressure end valve seat. In a first exhaust gas recirculation loop, exhaust gas enters from the low-pressure end exhaust gas inlet, passes through the low-pressure end exhaust gas recirculation valve and the cooler, and flows out of the low-pressure end exhaust gas outlet; and the low-pressure end exhaust gas recirculation valve controls the flow of the exhaust gas in the first exhaust gas recirculation loop. In a second exhaust gas recirculation loop, exhaust gas enters from the high-pressure end exhaust gas inlet, passes through the high-pressure end exhaust gas recirculation valve, and flows out of the high-pressure end exhaust gas outlet; and the high-pressure end exhaust gas recirculation valve controls the flow of the exhaust gas in the second exhaust gas recirculation loop.

Description

Double exhaust gas recirculation cooling device

[0001] The present invention relates to the field of automobile engines, and more particularly to a Twin Exhaust Gas Recirculation (TWIN EGR) cooling device.

Background technique

[0002] With the increasing number of car ownership in various countries, the living environment of human beings is deteriorating, and the restrictions on automobile emissions by relevant departments are becoming stricter. In Europe, Euro 5 emission standards are being implemented, and the Euro 6 standard will be implemented soon. In China, in early 2011, some cities began to implement the Euro IV standard, and in the next few years, the Euro 5 and Euro 6 standards will be gradually realized. Therefore, in order to meet increasingly stringent emission requirements, more and more advanced technologies are being applied to the engine.

[0003] Exhaust gas recirculation technology can reduce the temperature of the exhaust gas, increase the density of the recirculated exhaust gas, and have a significant effect on the reduction of nitrogen oxides in the exhaust gas. At present, in order to meet the requirements of Euro IV and Euro 5, the exhaust gas recirculation cooler generally uses a high-pressure exhaust gas recirculation scheme. When the engine emissions need to reach the Euro 6 level, some technical routes will increase the low-pressure exhaust gas recirculation to meet the new regulatory requirements. . However, arranging high pressure and low pressure exhaust gas recirculation in a limited engine space would be very difficult and complicated to install, which would increase labor costs and reduce engine competitiveness in the market.

[0004] Therefore, it is necessary to provide an improved technical solution to overcome the technical problems existing in the prior art.

Summary of the invention

The main technical problem to be solved by the present invention is to solve the problem that the high and low pressure exhaust gas recirculation coolers existing in the prior art are difficult to arrange in a limited space and the assembly process is complicated.

[0006] In order to solve the above technical problem, the present invention provides a dual exhaust gas recirculation cooling device, which includes:

a low pressure end valve seat having a low pressure end exhaust gas inlet and a low pressure end exhaust gas outlet;

a cooler detachably fixed to the low pressure end valve seat;

a low pressure end exhaust gas recirculation valve detachably fixed to the low pressure end valve seat;

a high pressure end valve seat detachably fixed to the cooler, the high pressure end valve seat having a high pressure end exhaust inlet and a high pressure end exhaust outlet;

a high pressure end exhaust gas recirculation valve detachably fixed to the high pressure end valve seat;

Wherein, in the first exhaust gas recirculation circuit, exhaust gas enters from the low pressure end exhaust gas inlet of the low pressure end valve seat, through the low pressure end exhaust gas recirculation valve and the cooler, from the low pressure end valve seat The low pressure end exhaust gas outlet flows out, the low pressure end exhaust gas recirculation valve controls a flow rate of the exhaust gas in the first exhaust gas recirculation circuit; in the second exhaust gas recirculation circuit, the high pressure of the exhaust gas from the high pressure end valve seat An exhaust gas inlet enters through the high pressure end exhaust gas recirculation valve, from the The high pressure end exhaust gas outlet of the high pressure end valve seat flows out, and the high pressure end exhaust gas recirculation valve controls the flow rate of the exhaust gas in the second exhaust gas recirculation circuit.

[0007] Optionally, in the above dual exhaust gas recirculation cooling device, the low pressure end valve seat and the low pressure end exhaust gas recirculation valve are fixed by fixing bolts, and are passed through a low pressure end exhaust gas recirculation valve gasket. seal.

[0008] Optionally, in the above dual exhaust gas recirculation cooling device, the low pressure end valve seat and the cooler are fixed by fixing bolts and sealed by a low pressure end seat gasket.

[0009] Optionally, in the above dual exhaust gas recirculation cooling device, the high pressure end valve seat and the high pressure end exhaust gas recirculation valve are fixed by fixing bolts, and are passed through a high pressure end exhaust gas recirculation valve gasket. seal.

[0010] Optionally, in the above dual exhaust gas recirculation cooling device, the high pressure end valve seat and the cooler are fixed by fixing bolts and sealed by a high pressure end seat gasket.

[0011] Optionally, in the above dual exhaust gas recirculation cooling device, the dual exhaust gas recirculation cooling device further includes a coolant inlet and an outlet pipe, and in the coolant circulation circuit, the coolant is discharged from the coolant inlet Intake, through the cooler, from the outlet pipe, the coolant exchanges heat with the exhaust gas passing through the cooler in the first exhaust gas recirculation circuit in the cooler.

[0012] Optionally, in the above dual exhaust gas recirculation cooling device, a cooling water jacket in liquid communication with the cooler is disposed inside the low pressure end valve seat, and the coolant enters from the coolant inlet The cooler and the cooling water jacket are discharged from the outlet pipe.

[0013] Optionally, in the above dual exhaust gas recirculation cooling device, a cooling water jacket is disposed inside the high pressure end valve seat, and the coolant inlet communicates with the high pressure end valve seat, in the coolant In the circulation loop, the coolant enters the high pressure end valve seat through the coolant inlet, and is divided into two paths in the high pressure end valve seat, and the first passage flows through the cooler into the low pressure end valve seat The cooling water jacket is then returned to the cooler and flows out through the outlet pipe; the second passage flows through the cooling water jacket in the high pressure end valve seat, enters the cooler and passes through the outlet The water pipe flows out.

[0014] Optionally, in the dual exhaust gas recirculation cooling device described above, a certain number of bundles are disposed inside the cooler.

[0015] Optionally, in the above dual exhaust gas recirculation cooling device, the cooler includes a casing, and a plurality of reinforcing ribs are disposed on the casing.

[0016] The dual exhaust gas recirculation cooling device according to the present invention can easily arrange the exhaust gas recirculation cooling module by integrating the high pressure exhaust gas recirculation with the low pressure exhaust gas recirculation, thereby solving the high pressure exhaust gas recirculation and the low pressure exhaust gas recirculation. The arrangement that occurs when the cycle is arranged together is difficult, the problem of assembly is impossible, and a large number of potential risks can be reduced, and the engines of Euro IV and Euro V can be easily upgraded to meet the emission requirements of Euro 6. Other aspects and features of the present invention will become apparent from the Detailed Description of the Drawing. It should be understood, however, that the drawings are intended for purposes of illustration only and are not intended to It should be understood that the drawings are not necessarily to scale,

DRAWINGS

The present invention will be more fully understood from the following detailed description of the embodiments of the invention. among them:

1 is a schematic structural view of a dual exhaust gas recirculation cooling device according to an embodiment of the present invention;

2 is a schematic diagram showing a first exhaust gas recirculation circuit of a dual exhaust gas recirculation cooling device according to an embodiment of the present invention; FIG. 3 is a view showing a second exhaust gas recirculation circuit of a dual exhaust gas recirculation cooling device according to an embodiment of the present invention; Schematic; and

4 is a schematic view showing a coolant circulation circuit of a dual exhaust gas recirculation cooling device according to an embodiment of the present invention. detailed description

[0019] To enable those skilled in the art to understand the subject matter of the present invention, the embodiments of the present invention are described in detail below.

[0020] The present invention provides a dual exhaust gas recirculation cooling device in view of the problem that the high and low pressure exhaust gas recirculation coolers existing in the prior art are difficult to arrange in a limited space and the assembly process is complicated. 1 shows a structural view of a dual exhaust gas recirculation cooling device 100 according to an embodiment of the present invention. As shown in FIG. 1, a dual exhaust gas recirculation cooling device 100 of a specific embodiment includes a low pressure end valve seat 1, and a low pressure. The detachably fixed cooler 2 of the end valve seat 2, the low-pressure end recirculation valve 3 detachably fixed to the low-pressure valve seat 1, the high-pressure end valve seat 4 detachably fixed to the cooler 2, and the high pressure The end valve seat 4 is detachably fixed to the high pressure end exhaust gas recirculation valve 5, wherein the low pressure end valve seat 1 has a low pressure end exhaust gas inlet 11 and a low pressure end exhaust gas outlet 12, and the high pressure end valve seat 4 has a high pressure end exhaust gas inlet 41 and a high pressure The exhaust gas exits P 42 .

[0021] FIG. 2 shows a schematic diagram of a first exhaust gas recirculation circuit of a dual exhaust gas recirculation cooling device 100 in accordance with an embodiment of the present invention. Referring to FIG. 2, referring to FIG. 2, in the first exhaust gas recirculation circuit, the exhaust gas enters from the low pressure end exhaust gas inlet 11 of the low pressure end valve seat 1, through the low pressure end exhaust gas recirculation valve 3 and the cooler 2, from the low pressure end. The low pressure end exhaust gas outlet 12 of the valve seat 1 flows out, and the low pressure side exhaust gas recirculation valve 3 controls the flow rate of the exhaust gas in the first exhaust gas recirculation circuit.

[0022] FIG. 3 shows a schematic diagram of a second exhaust gas recirculation circuit of a dual exhaust gas recirculation cooling device 100 in accordance with an embodiment of the present invention. Referring to FIG. 3, referring to FIG. 3, in the second exhaust gas recirculation circuit, the exhaust gas enters from the high pressure end exhaust gas inlet 41 of the high pressure end valve seat 4, through the high pressure end exhaust gas recirculation valve 5, from the high pressure end valve seat 4 High pressure exhaust gas outlet 42 flows out, and the high pressure end exhaust gas recirculation valve 5 controls the flow rate of the exhaust gas in the second exhaust gas recirculation circuit.

[0023] The low pressure end valve seat 1, the low pressure end exhaust gas recirculation valve 3 and the cooler 2 constitute a low pressure exhaust gas recirculation portion of the dual exhaust gas recirculation cooling device 100 of the present invention, a high pressure end valve seat 4 and a high pressure end exhaust gas recirculation valve 5 constitutes a high-pressure exhaust gas recirculation portion of the dual exhaust gas recirculation cooling device 100 of the present invention. The dual exhaust gas recirculation cooling device 100 of the present invention subtly integrates the low pressure exhaust gas recirculation portion with the high pressure exhaust gas recirculation portion.

[0024] Optionally, the low pressure end valve seat 1 and the low pressure end exhaust gas recirculation valve 3 are fixed by fixing bolts 6 and sealed by the low pressure side exhaust gas recirculation valve gasket 31. Alternatively, the low pressure end seat 1 and the cooler 2 are fixed by fixing bolts 6 and sealed by the low pressure end seat gasket 13.

[0025] Optionally, the high pressure end valve seat 4 and the high pressure end exhaust gas recirculation valve 5 are fixed by fixing bolts 6 and sealed by the high pressure end exhaust gas recirculation valve gasket 51. Alternatively, the high pressure end seat 4 and the cooler 2 are fixed by fixing bolts 6 and sealed by the high pressure end seat gasket 43.

In an alternative embodiment, the dual exhaust gas recirculation cooling device 100 of the present invention further includes a coolant inlet 21 and an outlet pipe 22 in which the coolant enters from the coolant inlet 21 The cooler 2 flows out of the outlet pipe 22, and the coolant exchanges heat with the exhaust gas passing through the cooler 2 in the first exhaust gas recirculation circuit in the cooler 2. The cooler 2 can be a shell and tube heat exchanger. For example, the cooler 2 includes a housing in which a certain number of tube bundles are disposed. The coolant flows through the outside of the tube bundle, and the exhaust gas flows through the inside of the patent tube bundle, and the coolant outside the tube bundle exchanges heat with the exhaust gas inside the tube bundle, so that the coolant absorbs heat from the exhaust gas to cool the exhaust gas. Optionally, a plurality of reinforcing ribs 23 are provided on the housing, and the reinforcing ribs 23 can enhance the rigidity of the housing.

[0027] A cooling water jacket in fluid communication with the cooler 2 is disposed inside the low pressure end valve seat 1 to reduce the influence of the exhaust gas temperature on the low pressure side exhaust gas recirculation valve 3. The coolant enters the coolant inlet 21 and passes through the cooler 2 and the cooling jacket in sequence, and flows out of the outlet pipe 22. A cooling water jacket is disposed inside the high pressure end valve seat 4 to reduce the influence of the exhaust gas temperature on the high pressure side exhaust gas recirculation valve 5, and the coolant inlet 21 communicates with the high pressure end valve seat 4.

4 shows a schematic diagram of a coolant circulation circuit of a dual exhaust gas recirculation cooling device 100 according to an embodiment of the present invention. As shown in FIG. 4, in a coolant circulation circuit, a coolant enters a high pressure through a coolant inlet 21. The end valve seat 4 is divided into two paths in the high pressure end valve seat 4, and the first passage flows through the cooler 2 into the cooling water jacket in the low pressure end valve seat 1 and then flows back to the cooler 2 and flows out through the outlet pipe 22; The two paths flow through the cooling water jacket in the high pressure end valve seat 4, enter the cooler 2 and flow out through the outlet pipe 22.

[0029] The dual exhaust gas recirculation cooling device 100 according to the present invention can easily arrange an exhaust gas recirculation cooling module by integrating high pressure exhaust gas recirculation with low pressure exhaust gas recirculation, thereby solving high pressure exhaust gas recirculation and low pressure exhaust gas. The arrangement that occurs when recycling is arranged together is difficult, the problem of assembly is impossible, and a large number of potential risks can be reduced. The occurrence of the Euro IV and Euro V engines can be easily upgraded to meet Euro 6 emission requirements.

The above specific embodiments are merely illustrative of the present invention, and are not intended to limit the scope of the invention, and various changes and modifications may be made without departing from the scope of the invention. Therefore, all equivalent technical solutions are also within the scope of the invention, and the scope of the invention should be defined by the claims.

Claims

Claim

A dual exhaust gas recirculation cooling device (100), characterized in that it comprises:

a low pressure end valve seat (1) having a low pressure end exhaust gas inlet (11) and a low pressure end exhaust gas outlet (12);

a cooler (2) detachably fixed to the low pressure end valve seat (1);

a low pressure end exhaust gas recirculation pottery (3) detachably fixed to the low pressure end valve seat (1);

a high pressure end valve seat (4) detachably fixed to the cooler (2), the high pressure end valve seat (4) having a high pressure end exhaust gas inlet (41) and a high pressure end exhaust gas outlet (42);

a high pressure end exhaust gas recirculation port (5) detachably fixed to the high pressure end valve seat (4);

Wherein, in the first exhaust gas recirculation circuit, exhaust gas enters from the low pressure end exhaust gas inlet (11) of the low pressure end valve seat (1), through the low pressure end exhaust gas recirculation valve (3) and the cooling (2), from the low pressure end seat

The low-pressure end exhaust gas outlet (12) of (1) flows out, the low-pressure end exhaust gas recirculation valve (3) controls the flow rate of the exhaust gas in the first exhaust gas recirculation circuit; in the second exhaust gas recirculation circuit, the exhaust gas is discharged The high-pressure end exhaust gas inlet (41) of the high-pressure end wide seat (4) enters, through the high-pressure end exhaust gas recirculation valve (5), from the high-pressure end exhaust gas outlet of the high-pressure end valve seat (4) (42) Outflow, the high pressure end exhaust gas recirculation valve (5) controls the flow rate of the exhaust gas in the second exhaust gas recirculation circuit.

The dual exhaust gas recirculation cooling device (100) according to claim 1, wherein the low pressure end valve seat (1) and the low pressure end exhaust gas recirculation valve (3) are fixed by fixing bolts (6) And through the low-pressure end exhaust gas recirculation wide gasket

(31) Perform sealing.

The dual exhaust gas recirculation cooling device (100) according to claim 1, wherein the low pressure end valve seat (1) and the cooler (2) are fixed by a fixing bolt (6) and passed through a low pressure The end seat gasket (13) is sealed.

The dual exhaust gas recirculation cooling device (100) according to claim 1, wherein the high pressure end valve seat (4) and the high pressure end exhaust gas recirculation valve (5) are fixed by fixing bolts (6) And through the high pressure end exhaust gas recycling ceramic gasket

(51) Perform sealing.

The dual exhaust gas recirculation cooling device (100) according to claim 1, wherein the high pressure end valve seat (4) and the cooler (2) are fixed by a fixing bolt (6) and passed through a high pressure The end seat gasket (43) is sealed.

6. The dual exhaust gas recirculation cooling device (100) according to claim 1, further comprising a coolant inlet (21) and an outlet pipe (22), in the coolant circulation circuit, the coolant from the coolant inlet (21) enter, through the cooler

(2) flowing out of the outlet pipe (22), the coolant being heat-exchanged with the exhaust gas passing through the cooler (2) in the first exhaust gas recirculation circuit in the cooler (2).

The dual exhaust gas recirculation cooling device (100) according to claim 6, wherein a cooling water jacket in liquid communication with the cooler (2) is disposed inside the low pressure end valve seat (1), and is cooled After entering the coolant inlet (21) The water outlet (22) flows out through the cooler (2) and the cooling water jacket.

8. The dual exhaust gas recirculation cooling device (100) according to claim 7, wherein a cooling water jacket is disposed inside the high pressure end valve seat (4), and the coolant inlet (21) communicates with the high pressure An end valve seat (4), in the coolant circulation circuit, a coolant enters the high pressure end valve seat (4) through the coolant inlet (21), and at the high pressure end valve seat

(4) divided into two paths, the first way flowing through the cooler (2) into the cooling water jacket in the low-pressure end valve seat (1) and flowing back to the cooler (2) and passing through The water pipe (22) flows out; the second path flows through the cooling water jacket in the high pressure end valve seat (4), enters the cooler (2) and flows out through the water outlet pipe (22).

9. The dual exhaust gas recirculation cooling device (100) according to claim 1, wherein a certain number of tube bundles are disposed inside the cooler (2).

10. The dual exhaust gas recirculation cooling device (100) according to claim 1, wherein the cooler (2) comprises a casing on which a plurality of reinforcing ribs (23) are disposed.