Novel EGR cooler assembly

Abstract

The utility model relates to a novel EGR cooler assembly which comprises an EGR cooler body, a gas inlet end cover, a gas outlet end cover, a water inlet pipeline and a water outlet pipeline, the gas inlet end cover and the gas outlet end cover are fixedly connected to the two ends of the EGR cooler body respectively, and the water inlet pipeline and the water outlet pipeline are both installed on the outer wall of the EGR cooler body. And the water inlet pipeline and the water outlet pipeline are both in fluid communication with the EGR cooler body.

Description

Technical Field

[0001] The utility model relates to the technical field of EGR coolers for automobile engines, in particular to a novel EGR cooler assembly. Background Art

[0002] Exhaust gas recirculation, referred to as EGR, is a method of introducing part of the exhaust gas into the intake pipe during the operation of the engine, mixing it with fresh air or atomized mixed gas and then entering the engine cylinder for re-combustion. This method is currently an effective measure to reduce NOx emissions. As a low-cost, small-change-to-the-engine-body, and effective NOx emission control measure, EGR technology has been increasingly widely used in the field of engine emission control.

[0003] The traditional EGR cooler assembly includes an EGR cooler, a valve seat, a gasket and bolts, wherein the EGR cooler and the valve seat are fixed with gaskets and bolts. Not only is the assembly complicated, but there is also a risk of air leakage between the valve seat and the EGR cooler due to gasket failure or insufficient bolt torque. Summary of the invention

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a novel EGR cooler assembly.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a new EGR cooler assembly, including an EGR cooler body, an air intake end cover, an air outlet end cover, a water inlet pipe, and a water outlet pipe, the air intake end cover and the air outlet end cover are respectively fixedly connected to the two ends of the EGR cooler body, the water inlet pipe and the water outlet pipe are both installed on the outer wall of the EGR cooler body, and the water inlet pipe and the water outlet pipe are both connected to the fluid of the EGR cooler body.

[0006] In an embodiment of the present application, the EGR cooler body includes an outer shell and an inner core, the inner core has an internal circulation channel, an annular cavity for fluid circulation is provided between the outer shell and the inner core, the air inlet end cover and the air outlet end cover are both fluidically connected to the internal circulation channel of the inner core, and the water inlet pipe and the water outlet pipe are fluidically connected to the annular cavity.

[0007] In an embodiment of the present application, a toothed structure is provided on the outer surface of the inner core of the EGR cooler body, and the toothed structure is formed by saw teeth extending along the circumferential and longitudinal directions of the inner core, and an annular flow groove is provided between two adjacent saw teeth, and the annular flow groove is fluidically connected to the annular cavity.

[0008] In an embodiment of the present application, the air intake end cover and the air outlet end cover are respectively fixedly connected to the two ends of the EGR cooler body by welding, and the water inlet pipe and the water outlet pipe are fixedly connected to the outer wall of the outer shell of the EGR cooler body by welding.

[0009] In an embodiment of the present application, the air inlet end cover includes an air inlet pipe and an air inlet connecting end cover, the air inlet pipe and the air inlet connecting end cover are fixedly connected, and a first reinforcing rib is arranged between the air inlet pipe and the air inlet connecting end cover; the air outlet end cover includes an air outlet pipe and an air outlet connecting end cover, the air outlet pipe and the air outlet connecting end cover are fixedly connected together, and the first reinforcing rib is arranged between the air outlet pipe and the air outlet connecting end cover, so as to enhance the strength of the air inlet end cover and the air outlet end cover.

[0010] In an embodiment of the present application, the fixed connection method between the air intake pipe and the air intake connection end cover includes welding and integral molding; the fixed connection method between the air outlet pipe and the air outlet connection end cover includes welding and integral molding.

[0011] In an embodiment of the present application, a bracket is further included, one end of the bracket is welded to the EGR cooler body, and the other end of the bracket is detachably connected to the automobile engine.

[0012] In an embodiment of the present application, the bracket includes a first section bracket and a second section bracket, the first section bracket and the second section bracket are perpendicular to each other and fixedly connected together, the second section bracket and the EGR cooler body are fixedly connected by welding, a preset number of bolt holes are provided on the first section bracket, and the first section bracket is detachably fixedly connected to the automobile engine by bolt connection; a second reinforcing rib is also arranged between the first section bracket and the second section bracket.

[0013] In an embodiment of the present application, a sensor seat may be provided on the air inlet end cover or the air outlet end cover, and the sensor seat has an installation channel, and the installation channel is fluidically connected to the air inlet end cover and the air outlet end cover, and a seat hole for installing a temperature sensor is provided in the installation channel, and the temperature sensor installed in the seat hole is used to measure the temperature in the air inlet end cover and the air outlet end cover.

[0014] In an embodiment of the present application, a flow direction of the cooling water flowing from the water inlet pipe to the water outlet pipe is the same as a flow direction of the gas in the air inlet end cover to the air outlet end cover.

[0015] The beneficial effects of the present application are as follows: the novel EGR cooler assembly provided by the present application eliminates the traditional valve seat, and the EGR cooler is directly connected to the engine, making the structure more compact, simple to assemble, and more reliable; according to different design boundaries, the entire EGR cooler assembly is connected and installed by an appropriate number of bolts, with a simple structure, easy to assemble, and strong operability; the elimination of the valve seat makes the assembly of the entire EGR cooler simple, reduces costs, and reduces the risk of leakage inside the EGR cooler assembly to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model provides a novel EGR cooler assembly structural schematic diagram.

[0017] Figure 2 Another structural schematic diagram of a novel EGR cooler assembly provided by the utility model.

[0018] Figure 3 Another structural schematic diagram of a novel EGR cooler assembly provided by the utility model.

[0019] Figure 4 Another structural schematic diagram of a novel EGR cooler assembly provided by the utility model. DETAILED DESCRIPTION

[0020] The present application is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are intended to enable the present application to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0021] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations, and the operation steps involved in each embodiment can also be replaced or adjusted in a sequence in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for the purpose of clearly describing a certain embodiment and do not mean that the composition and / or sequence are necessary.

[0022] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0023] Please refer to Figure 1-4 The present application provides a novel EGR cooler assembly, which includes an EGR cooler body 1, an air intake end cover 2, an air outlet end cover 3, a water inlet pipe 4, and a water outlet pipe 5. The air intake end cover 3 and the air outlet end cover 4 are respectively fixedly connected to the two ends of the EGR cooler body 1, and the water inlet pipe 4 and the water outlet pipe 5 are both installed on the outer wall of the EGR cooler body 1, and the water inlet pipe 4 and the water outlet pipe 5 are both fluidically connected to the EGR cooler body 1.

[0024] In one embodiment of the present application, the EGR cooler body 1 includes an outer shell 11 and an inner core 12, the inner core has an internal circulation channel 120, an annular cavity 13 for fluid circulation is provided between the outer shell 11 and the inner core 12, the air inlet end cover 2 and the air outlet end cover 3 are both in fluid communication with the internal circulation channel 120 of the inner core 12, and the water inlet pipe 4 and the water outlet pipe 5 are in fluid communication with the annular cavity 13. In this way, the air inlet end cover 2 and the air outlet end cover 3 are in fluid communication with the engine, and the hot gas ejected by the engine flows into the EGR cooler body 1 through the air inlet end cover 2. During the flow, the hot gas is cooled by the cooling water flowing from the water inlet pipe 4 into the water outlet pipe 5, so that the hot gas becomes cold gas, and the cold gas flows out of the air outlet end cover 3 and then flows into the engine for combustion again.

[0025] In one embodiment of the present application, a toothed structure 122 is provided on the outer surface of the inner core 12 of the EGR cooler body 1, and the toothed structure 122 is formed by saw teeth extending along the circumferential direction and the length direction of the inner core 12, and an annular flow groove 1220 is provided between two adjacent saw teeth, and the annular flow groove 1220 is fluidically connected to the annular cavity 13. In this way, the annular flow groove 1220 increases the area of ​​heat exchange between the cooling water and the inner core 12, so that the cooling effect is better.

[0026] In one embodiment of the present application, the air intake end cover 2 and the air outlet end cover 3 are respectively fixedly connected to the two ends of the EGR cooler body by welding, and the water inlet pipe 4 and the water outlet pipe 5 are fixedly connected to the outer wall of the outer shell 11 of the EGR cooler body 1 by welding.

[0027] In one embodiment of the present application, the air inlet end cover 2 includes an air inlet pipe 21 and an air inlet connecting end cover 22, the air inlet pipe 21 and the air inlet connecting end cover 22 are fixedly connected, and a first reinforcing rib 6 is arranged between the air inlet pipe 21 and the air inlet connecting end cover 22; the air outlet end cover 3 includes an air outlet pipe 31 and an air outlet connecting end cover 32, the air outlet pipe 31 and the air outlet connecting end cover 32 are fixedly connected together, and the first reinforcing rib 6 is arranged between the air outlet pipe 31 and the air outlet connecting end cover 32, so as to enhance the strength of the air inlet end cover 2 and the air outlet end cover 3.

[0028] In one embodiment of the present application, the fixed connection method between the air intake pipe 21 and the air intake connection end cover 22 includes welding and integral molding; the fixed connection method between the air outlet pipe 31 and the air outlet connection end cover 32 includes welding and integral molding.

[0029] In one embodiment of the present application, the EGR cooler assembly further includes a bracket 6, one end of the bracket 6 is welded to the EGR cooler body 1, and the other end of the bracket 6 is detachably connected to the automobile engine.

[0030] In one embodiment of the present application, the bracket 6 includes a first section bracket 61 and a second section bracket 62, the first section bracket 61 and the second section bracket 62 are perpendicular to each other and fixedly connected together, the second section bracket 62 and the EGR cooler body 1 are fixedly connected by welding, and a preset number of bolt holes are provided on the first section bracket 61, which is detachably fixedly connected to the automobile engine by bolt connection; a second reinforcing rib 63 is also provided between the first section bracket 61 and the second section bracket 62.

[0031] In one embodiment of the present application, a sensor seat 7 may be provided on the air inlet end cover 2 or the air outlet end cover 3, and the sensor seat 7 has a mounting channel 71, and the mounting channel 71 is fluidically connected to the air inlet end cover 2 and the air outlet end cover 3, and a seat hole 8 for mounting a temperature sensor is provided in the mounting channel 71, and the temperature sensor installed in the seat hole 8 is used to measure the temperature in the air inlet end cover 2 and the air outlet end cover 3.

[0032] In one embodiment of the present application, the flow direction of the cooling water from the water inlet pipe 4 to the water outlet pipe 5 is the same as the flow direction of the gas in the air inlet end cover 2 to the air outlet end cover 3. In this way, the arrangement of the engine pipeline is more convenient, and the reliability and service life of the EGR cooler assembly are further improved.

[0033] The novel EGR cooler assembly provided by the present application eliminates the traditional valve seat, and the EGR cooler is directly connected to the engine, making the structure more compact, simple to assemble, and more reliable; according to different design boundaries, the entire EGR cooler assembly is connected and installed by an appropriate number of bolts, with a simple structure, easy to assemble, and strong operability; the elimination of the valve seat makes the entire EGR cooler simple to assemble, reduces costs, and reduces the risk of leakage inside the EGR cooler assembly to a certain extent.

[0034] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A new type of EGR cooler assembly, characterized in that: It includes an EGR cooler body, an air intake end cover, an air outlet end cover, a water inlet pipe, and a water outlet pipe. The air intake end cover and the air outlet end cover are respectively fixedly connected to the two ends of the EGR cooler body, the water inlet pipe and the water outlet pipe are both installed on the outer wall of the EGR cooler body, and the water inlet pipe and the water outlet pipe are both connected to the fluid of the EGR cooler body.

2. The novel EGR cooler assembly according to claim 1 is characterized in that: The EGR cooler body includes an outer shell and an inner core, the inner core has an internal flow channel, an annular cavity for fluid circulation is provided between the outer shell and the inner core, the air inlet end cover and the air outlet end cover are both fluidically connected to the internal flow channel of the inner core, and the water inlet pipe and the water outlet pipe are fluidically connected to the annular cavity.

3. The novel EGR cooler assembly according to claim 2 is characterized in that: A toothed structure is provided on the outer surface of the inner core of the EGR cooler body. The toothed structure is formed by saw teeth extending along the circumference and length directions of the inner core, and an annular flow groove is provided between two adjacent saw teeth. The annular flow groove is fluidically connected to the annular cavity.

4. The novel EGR cooler assembly according to claim 3 is characterized in that: The air inlet end cover and the air outlet end cover are respectively fixedly connected to the two ends of the EGR cooler body by welding, and the water inlet pipe and the water outlet pipe are fixedly connected to the outer wall of the shell of the EGR cooler body by welding.

5. The novel EGR cooler assembly according to claim 4 is characterized in that: The air inlet end cover includes an air inlet pipe and an air inlet connecting end cover, the air inlet pipe and the air inlet connecting end cover are fixedly connected, and a first reinforcing rib is arranged between the air inlet pipe and the air inlet connecting end cover; the air outlet end cover includes an air outlet pipe and an air outlet connecting end cover, the air outlet pipe and the air outlet connecting end cover are fixedly connected together, and the first reinforcing rib is arranged between the air outlet pipe and the air outlet connecting end cover, so as to enhance the strength of the air inlet end cover and the air outlet end cover.

6. The novel EGR cooler assembly according to claim 5 is characterized in that: The fixed connection method between the air inlet pipe and the air inlet connection end cover includes welding and integral molding; the fixed connection method between the air outlet pipe and the air outlet connection end cover includes welding and integral molding.

7. The novel EGR cooler assembly according to claim 5 is characterized in that: It also includes a bracket, one end of which is welded to the EGR cooler body, and the other end of which is detachably connected to the automobile engine.

8. The novel EGR cooler assembly according to claim 7 is characterized in that: The bracket includes a first section bracket and a second section bracket, the first section bracket and the second section bracket are perpendicular to each other and fixedly connected together, the second section bracket and the EGR cooler body are fixedly connected by welding, a preset number of bolt holes are opened on the first section bracket, and the first section bracket is detachably fixedly connected to the automobile engine by bolt connection; a second reinforcing rib is also arranged between the first section bracket and the second section bracket.

9. The novel EGR cooler assembly according to claim 8 is characterized in that: A sensor seat may be provided on the air inlet end cover or the air outlet end cover, and the sensor seat has an installation channel, and the installation channel is fluidically connected to the air inlet end cover and the air outlet end cover. A seat hole for installing a temperature sensor is provided in the installation channel, and the temperature sensor installed in the seat hole is used to measure the temperature in the air inlet end cover and the air outlet end cover.

10. The novel EGR cooler assembly according to claim 9 is characterized in that: The flow direction of the cooling water flowing from the water inlet pipe to the water outlet pipe is the same as the flow direction of the gas in the air inlet end cover to the air outlet end cover.

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