Engine integrated cooling device

Abstract

The utility model discloses an integrated cooling device of engine, including lubricating oil cooling unit and exhaust cooling unit, exhaust cooling unit and lubricating oil cooling unit fixed integration as a whole, and be equipped with heat insulation unit between exhaust cooling unit and lubricating oil cooling unit on integration interface, the utility model discloses exhaust cooling unit and lubricating oil cooling unit integration as a whole, and set up heat insulation unit at integration interface, make the cooling effect of both not interfere with each other, to guarantee the normal operation of engine, at the same time, owing to having adopted the integrated structure setting, reduced the occupation space of both on whole car, installs the concentration and reduces manufacturing cost and owing to the installation concentration leads to the reduction of installation cost, reduced cooling system spare parts quantity, eliminated the complexity of pipeline owing to the interconnection pipeline between both, and then guarantee the compactness of whole car.

Description

Technical Field

[0001] This utility model relates to a vehicle engine cooling system, and more particularly to an integrated cooling device for an engine. Background Technology

[0002] Engines are commonly used traditional power equipment in vehicles. With the continuous development of engine technology, the performance requirements of the engine itself and the environmental protection requirements during engine use have made the engine's lubrication system thermal management and exhaust gas recirculation system (hereinafter referred to as EGR system) indispensable systems. Lubrication system thermal management refers to the cooling and heat dissipation treatment of engine lubricating oil to ensure the normal operation of engine moving parts; while the exhaust gas recirculation system (EGR) is an effective measure to reduce nitrogen emissions. This system introduces a portion of the exhaust gas into the combustion chamber after cooling, thereby reducing nitrogen generation and emissions. Because the exhaust gas introduced into the combustion chamber needs to be cooled, an EGR condenser is installed in the engine EGR system.

[0003] In existing technologies, the coolers in the lubrication system and the EGR system are independent components, both using water cooling to cool the lubricating oil and exhaust gas. In practical applications, their coolants are connected in series or parallel. This results in a large number of parts, complex piping, increased leakage points, and higher installation and manufacturing costs. The main issue is that the independent yet interconnected nature of the equipment makes the installation process complex, requiring a large and dispersed space, thus affecting the overall vehicle's compactness.

[0004] To address the aforementioned issues, a structure integrating the exhaust gas cooler and lubricating oil cooler was developed, resolving the integration problem. However, since both are integrated and made of thermally conductive materials, their heat dissipation processes interfere with each other. In particular, the exhaust gas cooler, with its high exhaust gas temperature, affects the cooling of the lubricating oil, making its cooling effect uncontrollable. Consequently, this impacts the normal operation of the entire vehicle's lubrication system.

[0005] Therefore, it is necessary to improve the existing integrated structure of exhaust gas cooler and lubricating oil cooler, so as to have all the advantages of integrated structure and ensure that the cooling effects of the two do not interfere with each other, so as to ensure the normal operation of the engine. Utility Model Content

[0006] In view of this, the present invention provides an integrated engine cooling device that has all the advantages of an integrated structure and ensures that the cooling effects of the two components do not interfere with each other, thereby guaranteeing the normal operation of the engine.

[0007] The engine integrated cooling device of this utility model includes a lubricating oil cooling unit for cooling the vehicle's lubricating oil and an exhaust gas cooling unit for cooling the vehicle's exhaust gas. The exhaust gas cooling unit and the lubricating oil cooling unit are fixedly integrated into one unit, and a heat insulation unit is provided at the integrated interface between the exhaust gas cooling unit and the lubricating oil cooling unit.

[0008] Furthermore, the cooling liquid phase space of the lubricating oil cooling unit and the cooling liquid phase space of the exhaust gas cooling unit are connected at the integrated interface of the exhaust gas cooling unit and the lubricating oil cooling unit.

[0009] Furthermore, the heat insulation unit forms a heat insulation space, which enables the exhaust gas cooling unit and the lubricating oil cooling unit to be relatively heat-insulated at the integrated interface.

[0010] Furthermore, the cooling liquid phase space of the lubricating oil cooling unit and the cooling liquid phase space of the exhaust gas cooling unit are connected through the heat insulation space.

[0011] Furthermore, the heat insulation space of the heat insulation unit is either a single unit or divided into several heat insulation space units arranged side by side between the exhaust gas cooling unit and the lubricating oil cooling unit.

[0012] Furthermore, the heat insulation space of the heat insulation unit is divided into several heat insulation space units arranged side by side between the exhaust gas cooling unit and the lubricating oil cooling unit, and the adjacent heat insulation space units are connected in a roundabout manner.

[0013] Furthermore, the lubricating oil cooling unit, the heat insulation unit, and the exhaust gas cooling unit are arranged side by side and pressed together, so that the coolant outlet of the lubricating oil cooling unit is connected to the coolant inlet of the heat insulation unit, and the coolant outlet of the heat insulation unit is connected to the coolant inlet of the exhaust gas cooling unit.

[0014] Furthermore, heat dissipation fins are formed on the outside of the heat insulation unit.

[0015] Furthermore, the exhaust gas cooling unit, heat insulation unit, and lubricating oil cooling unit are welded and fixedly integrated into one unit.

[0016] Furthermore, both the exhaust gas cooling unit and the lubricating oil cooling unit have heat dissipation fins formed on their exteriors.

[0017] The beneficial effects of this utility model are as follows: The integrated engine cooling device of this utility model integrates the exhaust gas cooling unit and the lubricating oil cooling unit into one unit, and sets a heat insulation unit at the integration interface to ensure that the cooling effects of the two do not interfere with each other, thereby ensuring the normal operation of the engine. At the same time, due to the integrated structure, the space occupied by the exhaust gas cooling unit and the lubricating oil cooling unit in the whole vehicle is reduced, the installation is centralized and the manufacturing cost is reduced, and the installation cost is reduced due to the centralized installation. The number of cooling system parts is reduced, the complexity of the pipeline caused by connecting the two is eliminated, and thus the compactness of the whole vehicle is ensured. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the external structure of this utility model; Figure 2 for Figure 1 A longitudinal sectional view; Figure 3 for Figure 2 Enlarged view of point A. Detailed Implementation

[0020] like Figures 1 to 3 As shown: The integrated engine cooling device of this embodiment includes a lubricating oil cooling unit 2 for cooling the vehicle's lubricating oil and an exhaust gas cooling unit 1 for cooling the vehicle's exhaust gas. The exhaust gas cooling unit 1 and the lubricating oil cooling unit 2 are fixedly integrated into one unit, and a heat insulation unit 3 is provided at the integration interface between the exhaust gas cooling unit 1 and the lubricating oil cooling unit 2. The structure and cooling principle of the exhaust gas cooling unit 1 and the lubricating oil cooling unit 2 are not limited or described here; existing mechanical equipment structures can be used. However, in order to integrate them into one unit, planarization or shape adaptation treatment is required at the interconnecting parts, which is a conventional design in the mechanical field and will not be elaborated here. The integration interface refers to the interface that allows the exhaust gas cooling unit 1 and the lubricating oil cooling unit 2 to connect to each other after integration. The contact surfaces will not be described in detail here; the heat insulation unit 3 is located at the integration interface, separating the two to form heat insulation; as shown in the figure, the heat insulation unit 3 is sandwiched between the exhaust gas cooling unit 1 and the lubricating oil cooling unit 2 to form heat insulation and avoid heat exchange interference between the two; the principle and structure of the heat insulation unit 3 can be adopted in various ways, such as using a physical heat insulation layer with poor thermal conductivity, forming a hollow interlayer, adding non-thermal conductive materials in the central interlayer, and allowing coolant to flow directly in the interlayer, etc.; the fixed integration method can also be various mechanical connection methods, the purpose of which is to fix the two into one and attach the heat insulation unit 3 to the integration interface, such as welding, long bolt connection, forming connecting wings and connecting by bolts, or even snap-fit ​​connection, all of which can achieve the purpose of fixed integration, which will not be described in detail here.

[0021] This integrated structure has all the advantages of existing integrated structures, namely, a reduction in the number of parts, resulting in lower transportation, management, and unit costs; a reduction in external piping and parts, which reduces the risk of seal failure; and a reduction in mounting bolts, clamps, and other connectors, saving costs and simplifying the installation process, which will not be elaborated further here.

[0022] In this example, the coolant phase space 203 of the lubricating oil cooling unit 2 and the coolant phase space 103 of the exhaust gas cooling unit 1 are connected at the integrated interface of the exhaust gas cooling unit 1 and the lubricating oil cooling unit 2. That is, the two do not need to be connected by external pipes to form a series connection. The connection is achieved through an internal interface (if the insulation unit is an insulation pad or other insulation layer, the internal interface needs to be sealed through the insulation layer, which is a common mechanical design structure). Of course, for the integrated structure, the two can also adopt a parallel cooling liquid introduction structure, in which case there is no need to form a connection at the integrated interface, and the internal setting is relatively simple, which will not be described in detail here. The coolant phase space here refers to the space through which the coolant passes and is used for heat exchange with the medium during the cooling process, which will not be described in detail here.

[0023] In this example, the heat insulation unit 3 forms a heat insulation space 303, which provides relative heat insulation between the exhaust gas cooling unit 1 and the lubricating oil cooling unit 2 at the integrated interface; as Figure 2 and Figure 3 As shown, the heat insulation space 303 is formed in the heat insulation unit and is generally parallel to the integrated interface. In this embodiment, the heat insulation space is a plate-shaped structure space that covers the integrated interface as a whole. Due to the setting of this space, the heat conduction between the lubricating oil cooling unit 2 and the exhaust gas cooling unit 1 is completely cut off from the heat transfer path, thereby ensuring that the cooling of the two is relatively independent.

[0024] In this example, the cooling liquid phase space 203 of the lubricating oil cooling unit 2 and the cooling liquid phase space 103 of the exhaust gas cooling unit 1 are connected through the heat insulation space 303. In this structure, the heat insulation space 303 serves as a channel connecting the cooling liquid phase space 203 of the lubricating oil cooling unit 2 and the cooling liquid phase space 103 of the exhaust gas cooling unit 1 in series. At the same time, the coolant acts as a heat insulation medium when passing through the heat insulation space, which has advantages that other heat insulation layers formed by non-thermal conductive materials do not have. It can carry away the heat that causes interference between the two at any time, thereby further avoiding cooling interference and improving the operating quality of the cooling system. Of course, this embodiment discloses a series structure. In a parallel structure, the coolant should enter the lubricating oil cooling unit 2, the exhaust gas cooling unit, and the heat insulation unit 3 respectively and flow out separately. This will not be elaborated further here.

[0025] In this example, the heat insulation space 303 of the heat insulation unit 3 is either a whole or divided into several heat insulation space units arranged side by side between the exhaust gas cooling unit 1 and the lubricating oil cooling unit 2. Selecting one heat insulation space or several parallel space units is based on the heat insulation requirements and will not be elaborated here. Multiple heat insulation space units can further increase the amount of heat insulation coolant, and the heat insulation effect is naturally stronger, which will not be elaborated here.

[0026] In this example, the heat insulation space 303 of the heat insulation unit 3 is divided into several heat insulation space units arranged side by side between the exhaust gas cooling unit 1 and the lubricating oil cooling unit 2, and adjacent heat insulation space units form a meandering connection; the meandering connection means that the gas flows through the entire heat insulation unit before entering the adjacent heat insulation space unit, and so on, which will not be elaborated further here; Figure 2 and Figure 3 As shown in the figure, in this embodiment, the use of two heat insulation space units increases the flow of coolant in the heat insulation space and forms two layers of heat insulation space with coolant as the medium, further ensuring the heat insulation effect.

[0027] In this example, the lubricating oil cooling unit 2, the heat insulation unit 3, and the exhaust gas cooling unit 1 are arranged side by side and pressed together, such that the coolant outlet 202 of the lubricating oil cooling unit 2 is connected to the coolant inlet 301 of the heat insulation unit 3, and the coolant outlet 302 of the heat insulation unit 3 is connected to the coolant inlet 101 of the exhaust gas cooling unit 1; Figure 3 As shown, the three components can be tightly joined using existing mechanical connections, which will not be elaborated further. In the clamping structure, to ensure proper coolant flow, the coolant inlets and outlets of the three components should be mutually aligned. Of course, necessary seals must be formed around the inlets and outlets, which will not be elaborated further. Figure 3 As shown, the lubricating oil cooling unit is equipped with a coolant inlet 101 (since the cross-section does not pass through this inlet, the inlet is the area indicated by the dotted line in the figure; other inlets and outlets are also indicated by dotted lines and will not be described further here). After the coolant flows through the lubricating oil cooling unit 2 and completes cooling (as shown by the arrow in the figure), it enters the coolant inlet 301 of the heat insulation unit from the coolant outlet 202 of the lubricating oil cooling unit 2. After flowing through the heat insulation space 303 of the heat insulation unit 3, it enters the coolant inlet 101 of the exhaust gas cooling unit 1. After completing cooling in the exhaust gas cooling unit 1, it flows out from the coolant outlet of the exhaust gas cooling unit 1. Figure 2As shown by the middle arrow; in this structure, since the lubricating oil cooling unit 2, the heat insulation unit 3, and the exhaust gas cooling unit 1 are arranged side by side and pressed together, the adjacent end caps of the lubricating oil cooling unit 2, the heat insulation unit 3, and the exhaust gas cooling unit 1 can be removed. The adjacent spatial interfaces can be directly pressed together and the spaces can be connected. Therefore, the coolant outlet 202 of the lubricating oil cooling unit 2 and the coolant inlet 301 of the heat insulation unit 3, and the coolant outlet 302 of the heat insulation unit 3 and the coolant inlet 101 of the exhaust gas cooling unit 1 can all be the same flow port. For example, in this embodiment, the coolant outlet 202 of the lubricating oil cooling unit 2 and the coolant inlet 301 of the heat insulation unit 3 use the same flow hole. This is a conventional design and will not be described in detail here. In this structure, the coolant flow direction is: lubricating oil cooling unit → heat insulation unit → exhaust gas cooling unit; of course, it can also be: exhaust gas cooling unit → heat insulation unit → lubricating oil cooling unit; and parallel flow mode, which will not be elaborated here.

[0028] In this example, the heat insulation unit 3 has heat dissipation fins 304 on its exterior, which are used to form sufficient heat exchange with the outside world, thereby reducing the temperature of the coolant and ensuring that the coolant after cooling the lubricating oil can fully cool the exhaust gas of the exhaust gas cooling unit 1, and vice versa. This will not be elaborated further here.

[0029] In this example, the exhaust gas cooling unit 1, the heat insulation unit 3, and the lubricating oil cooling unit 2 are welded and fixedly integrated into one unit, as shown in the figure. The welded integrated structure can remove the excess shell parts between the three units, reduce the overall weight of the cooling system, and further demonstrate the technical effect of integration. Of course, a detachable structure can be adopted to facilitate maintenance and replacement, etc., which will not be elaborated here.

[0030] In this example, both the exhaust gas cooling unit 1 and the lubricating oil cooling unit 2 have heat dissipation fins on their exteriors, which facilitates heat dissipation through external air to ensure the cooling effect. Further details will not be elaborated here.

[0031] In this utility model, the exhaust gas cooling unit 1, the heat insulation unit 3, and the lubricating oil cooling unit 2 all adopt a modular design, that is, multiple modules are stacked to form each unit. Each module has its own heat dissipation fins. During equipment manufacturing, modules can be added or removed as needed. This is a common combination structure in the field of heat dissipation, and will not be described in detail here.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An engine integrated cooling device, characterized by: The lubricating oil cooling unit for cooling lubricating oil of a vehicle and the exhaust gas cooling unit for cooling exhaust gas of the vehicle are fixedly integrated, and a heat insulation unit is arranged between the exhaust gas cooling unit and the lubricating oil cooling unit at an integrated interface.

2. The engine integrated cooling device according to claim 1, characterized by: The cooling liquid phase space of the lubricating oil cooling unit and the cooling liquid phase space of the exhaust gas cooling unit are communicated at the integrated interface of the exhaust gas cooling unit and the lubricating oil cooling unit.

3. The engine integrated cooling device according to claim 1, characterized by: The heat insulation unit forms a heat insulation space, which relatively insulates the exhaust gas cooling unit and the lubricating oil cooling unit at the integrated interface.

4. The engine integrated cooling device according to claim 3, characterized by: The cooling liquid phase space of the lubricating oil cooling unit and the cooling liquid phase space of the exhaust gas cooling unit are communicated through the heat insulation space.

5. The engine integrated cooling apparatus according to claim 4, characterized by: The heat insulation space of the heat insulation unit is one or is divided into several heat insulation space units juxtaposed between the exhaust gas cooling unit and the lubricating oil cooling unit.

6. The engine integrated cooling apparatus according to claim 5, characterized by: The heat insulation space of the heat insulation unit is divided into several heat insulation space units juxtaposed between the exhaust gas cooling unit and the lubricating oil cooling unit, and adjacent heat insulation space units are communicated in a detour.

7. The engine integrated cooling device according to claim 3, characterized by: The lubricating oil cooling unit, the heat insulation unit and the exhaust gas cooling unit are juxtaposed and abutted in sequence, so that the cooling liquid outlet of the lubricating oil cooling unit is communicated with the cooling liquid inlet of the heat insulation unit, and the cooling liquid outlet of the heat insulation unit is communicated with the cooling liquid inlet of the exhaust gas cooling unit.

8. An engine integrated cooling arrangement according to any one of claims 3 to 7, characterised in that: The heat insulation unit is externally formed with heat dissipation fins.

9. The engine integrated cooling apparatus according to claim 1, characterized by: The exhaust gas cooling unit, the heat insulation unit and the lubricating oil cooling unit are fixedly integrated by welding.

10. The engine integrated cooling apparatus according to claim 1, characterized by: The exhaust gas cooling unit and the lubricating oil cooling unit are externally formed with heat dissipation fins.

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