Engine thermostat mounting structure

Abstract

The present invention provides an engine thermostat mounting structure, which relates to the field of engine technology; the engine thermostat mounting structure includes a thermostat assembly mounting cavity and a thermostat assembly mounting flange surface; the thermostat assembly mounting cavity is divided into an upper cavity and a lower cavity; the thermostat assembly mounting flange surface is provided with a thermostat assembly mounting screw hole, an oil cooler and a cylinder body return water hole, and a thermostat mounting hole; the engine thermostat mounting structure also includes: a small circulation water pipe mounting bolt hole, a small circulation water outlet hole, a low-pressure EGR water outlet hole, and a low-pressure EGR water pipe bracket flange mounting hole located on the exhaust side; the engine thermostat mounting structure also includes: a degassing pipe mounting threaded hole located on the upper end surface of the cylinder head, and an engine temperature sensor mounting threaded hole. The engine thermostat mounting structure of the present application has the advantages of simple and compact structure, and can reduce the outer contour size of the engine.

Description

Technical Field

[0001] The invention relates to the technical field of engines, and in particular to an engine thermostat mounting structure. Background Art

[0002] The function of the engine thermostat mounting structure is to install the thermostat, distribute the coolant flow according to the coolant flow requirements of each cooling component, and adjust the coolant flow of the engine's large and small cycles through the structure. When the thermostat is closed or open, the coolant of the diverted engine flows through the radiator or directly connected to the water pump inlet. According to the different engine outlet water temperatures, the coolant cooling intensity of each cooling component is automatically adjusted to prevent the engine from warming up slowly in winter and the coolant from boiling in summer. During the operation of the engine, the thermostat mounting structure is generally independent of the engine body, which increases the external contour size of the engine, is not convenient for the integrated design of the engine, and causes the engine axial dimension to be too long, which is not convenient for various vehicle manufacturers to carry out engine matching design.

[0003] With the improvement of the integrated and platform design awareness of vehicle manufacturers, the external dimensions of the engine are receiving more and more attention due to the flexible layout of miniaturized engines. The integrated design of the thermostat installation structure is an effective way to solve the problem of excessive external dimensions of the engine. Summary of the invention

[0004] The invention provides an engine thermostat installation structure, which has a simple and compact structure and can reduce the outer contour size of the engine.

[0005] In order to achieve the above object, the present invention adopts the following technical scheme:

[0006] An engine thermostat mounting structure comprises a thermostat assembly mounting cavity and a thermostat assembly mounting flange surface; the thermostat assembly mounting cavity is divided into an upper cavity and a lower cavity; the thermostat assembly mounting flange surface is provided with a thermostat assembly mounting screw hole, an oil cooler and a cylinder return hole, and a thermostat mounting hole; the engine thermostat mounting structure also comprises: a small circulation water pipe mounting bolt hole, a small circulation water outlet hole, a low-pressure EGR water outlet hole, and a low-pressure EGR water pipe bracket flange mounting hole located on the exhaust side; the engine thermostat mounting structure also comprises: a degassing pipe mounting threaded hole and an engine temperature sensor mounting threaded hole located on the upper end surface of the cylinder head.

[0007] Preferably, the small circulation water pipe mounting bolt hole, the low-pressure EGR water pipe bracket flange mounting hole, the degassing pipe mounting threaded hole, the engine temperature sensor mounting threaded hole, and the thermostat assembly mounting screw hole are all connecting structures of the external cooling system.

[0008] Preferably, the small circulation water outlet hole is located at the bottom of the thermostat assembly installation cavity, and a thermostat auxiliary valve limiting sealing surface is provided at the bottom of the thermostat assembly installation cavity.

[0009] Preferably, the thermostat assembly mounting flange surface is connected to the thermostat assembly; the oil cooler is in communication with the cylinder block return hole and the oil cooler return pipe, the water outlet of the oil cooler return pipe and the cylinder head converges in the upper cavity, and the large circulating water flow is diverted through the lower cavity.

[0010] Preferably, the small circulation water outlet hole is connected to the small circulation pipeline, and flow distribution is performed in the lower cavity.

[0011] Preferably, the low-pressure EGR water outlet is connected to the low-pressure EGR water inlet.

[0012] Preferably, the degassing pipe mounting threaded hole is connected to an expansion water tank.

[0013] Preferably, the upper cavity serves as a converging cavity for water return from the cylinder head, water return from the oil cooler, and water return from the cylinder body; and the lower cavity serves as a coolant flow distribution structure for the small cycle and the large cycle.

[0014] Preferably, the degassing pipe mounting threaded holes are arranged vertically.

[0015] Preferably, the engine thermostat mounting structure is made of cast aluminum alloy material.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The engine thermostat mounting structure provided by the present invention can directly install components such as a thermostat assembly, a small circulation water pipe, an EGR water pipe, a degassing pipe and a water outlet temperature sensor, and the engine thermostat mounting structure can be integrated with the rear end of the engine cylinder head, thereby effectively reducing the number of engine parts, making the engine structure simpler, more compact and more integrated, and reducing the outer contour size of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A front view of an engine thermostat mounting structure provided in an embodiment of the present application;

[0020] Figure 2 for Figure 1 A left side view of the engine thermostat mounting structure;

[0021] Figure 3 for Figure 1 A top view of the engine thermostat mounting structure.

[0022] Reference numerals:

[0023] 1- small circulation water pipe mounting bolt hole; 2- small circulation water outlet hole; 3- low-pressure EGR water outlet hole; 4- low-pressure EGR water pipe bracket flange mounting hole; 5- degassing pipe mounting threaded hole; 6- engine temperature sensor mounting threaded hole; 7- thermostat assembly mounting screw hole; 8- thermostat assembly mounting cavity; 9- oil cooler and cylinder block return water hole; 10- thermostat assembly mounting flange surface. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application shall have the usual meanings understood by persons with ordinary skills in the field to which the invention belongs. The use of "include" or "comprise" and other similar words in the embodiments of the present invention means that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Install", "connect", and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements.

[0026] The present application embodiment provides an engine thermostat installation structure, such as Figure 1 , Figure 2 , Figure 3 As shown, the engine thermostat mounting structure includes a thermostat assembly mounting cavity 8 and a thermostat assembly mounting flange surface 10 .

[0027] The thermostat assembly installation cavity 8 is divided into an upper cavity and a lower cavity.

[0028] The thermostat assembly mounting flange surface is provided with a thermostat assembly mounting screw hole 7, an oil cooler and a cylinder body water return hole 9, and a thermostat mounting hole.

[0029] Schematically, in some embodiments, a plurality of thermostat assembly mounting screw holes 7 are provided on the thermostat assembly mounting flange surface 10 for fixing the thermostat upper cover; and a thermostat mounting hole is provided for installing the thermostat; and the thermostat assembly mounting flange surface 10 and the thermostat upper cover are press-fitted and sealed by a sealing ring.

[0030] It should be noted that the present application does not specifically limit the number of the thermostat assembly mounting screw holes 7. For example, it can be Figure 2 The number shown is 4; of course, it can also be 6, 8, etc.

[0031] On this basis, the engine thermostat mounting structure of the present application also includes: a small circulation water pipe mounting bolt hole 1 located on the exhaust side, a small circulation water outlet hole 2, a low-pressure EGR water outlet hole 3, a low-pressure EGR (exhaust gas recirculation) water pipe bracket flange mounting hole 4, and a degassing pipe mounting threaded hole 5 and an engine temperature sensor mounting threaded hole 6 located on the upper end surface of the cylinder head.

[0032] It should be noted that the above-mentioned small circulation water outlet hole 2 is used to distribute the small circulation water flow to the front end of the water pump.

[0033] The low-pressure EGR water outlet hole 3 is used to provide a suitable coolant flow to the low-pressure EGR cooler.

[0034] The above-mentioned degassing pipe mounting threaded hole 5 is used to guide the gas generated by the water pump and the water jacket during the operation of the engine to the expansion water tank for gas-liquid separation, increase the effective heat dissipation flow in the radiator, reduce the temperature difference between the radiator inlet and outlet and the thermal balance cooling constant of the whole vehicle, and reduce the risk of coolant boiling.

[0035] The engine temperature sensor mounting threaded hole 6 is used to mount an engine water outlet temperature sensor, which feeds back the engine water outlet temperature to an ECU (electronic control unit) for real-time monitoring to ensure that the engine does not overheat.

[0036] In summary, the engine thermostat mounting structure provided in the embodiment of the present application can directly install components such as the thermostat assembly, the small circulation water pipe, the EGR water pipe, the degassing pipe and the water outlet temperature sensor, and the engine thermostat mounting structure can be integrated with the rear end of the engine cylinder head, thereby effectively reducing the number of parts of the engine, making the structure of the engine simpler, more compact and more integrated, and reducing the outer contour size of the engine.

[0037] The following embodiments further specifically illustrate the above engine thermostat installation structure.

[0038] In some embodiments, the small circulation water pipe mounting bolt hole 1, the low-pressure EGR water pipe bracket flange mounting hole 4, the degassing pipe mounting threaded hole 5, the engine temperature sensor mounting threaded hole 6, and the thermostat assembly mounting screw hole 7 are all connection structures of the external cooling system.

[0039] In some embodiments, the small circulation water outlet hole 2 is located at the bottom of the thermostat assembly installation cavity 8, and a thermostat auxiliary valve limiting sealing surface is provided at the bottom of the thermostat assembly installation cavity 8.

[0040] In some embodiments, the above-mentioned thermostat assembly mounting flange surface 10 is connected to the thermostat assembly; the oil cooler and the cylinder body return hole 9 are connected to the oil cooler return pipe, and the water output of the oil cooler return pipe and the cylinder head is converged in the upper cavity, and the large circulating water flow is diverted through the lower cavity.

[0041] In some embodiments, the small circulation water outlet hole 2 is connected to the small circulation pipeline to perform flow distribution in the lower cavity.

[0042] In some embodiments, the low-pressure EGR water outlet 3 is connected to the low-pressure EGR water inlet.

[0043] In some embodiments, the degassing pipe mounting threaded hole 5 is connected to an expansion water tank.

[0044] In some embodiments, the above-mentioned upper cavity serves as a convergence cavity for cylinder head return water, oil cooler return water, and cylinder body return water; the lower cavity serves as a coolant flow distribution structure for small circulation and large circulation; in this application, the design of the upper cavity and the upper cavity is adopted, which is conducive to the reasonable convergence and distribution of the coolant.

[0045] In some embodiments, the degassing pipe mounting threaded holes 5 are arranged vertically, so that the bubbles in the engine water jacket can be effectively separated into the expansion water tank through the degassing pipe.

[0046] In some embodiments, the arrangement of the engine temperature sensor mounting threaded hole 6 cooperates with the temperature sensor temperature sensing component to ensure that the collected coolant passes through the temperature sensing component.

[0047] In some embodiments, the engine thermostat mounting structure of the present application is made of cast aluminum alloy material, thereby ensuring that the engine thermostat mounting structure has sufficient strength while having a lightweight design for the engine.

[0048] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An engine thermostat mounting structure, characterized in that: It comprises a thermostat assembly mounting cavity (8) and a thermostat assembly mounting flange surface (10); the thermostat assembly mounting cavity (8) is divided into an upper cavity and a lower cavity; The thermostat assembly mounting flange surface is provided with a thermostat assembly mounting screw hole (7), an oil cooler and cylinder body water return hole (9), and a thermostat mounting hole; The engine thermostat mounting structure further comprises: a small circulation water pipe mounting bolt hole (1) located on the exhaust side, a small circulation water outlet hole (2), a low-pressure EGR water outlet hole (3), and a low-pressure EGR water pipe bracket flange mounting hole (4); The engine thermostat mounting structure further comprises: a degassing pipe mounting threaded hole (5) and an engine temperature sensor mounting threaded hole (6) located on the upper end surface of the cylinder head; The small circulation water pipe mounting bolt hole (1), the low-pressure EGR water pipe bracket flange mounting hole (4), the degassing pipe mounting threaded hole (5), the engine temperature sensor mounting threaded hole (6), and the thermostat assembly mounting screw hole (7) are all connection structures of the external cooling system; The small circulation water outlet hole (2) is located at the bottom of the thermostat assembly installation cavity (8), and a thermostat auxiliary valve limiting sealing surface is provided at the bottom of the thermostat assembly installation cavity (8); The low-pressure EGR water outlet (3) is connected to the low-pressure EGR water inlet; The degassing pipe mounting threaded hole (5) is connected to the expansion water tank; The upper cavity is used as a converging cavity for water return from the cylinder head, water return from the oil cooler, and water return from the cylinder body; the lower cavity is used as a coolant flow distribution structure for the small cycle and the large cycle.

2. The engine thermostat mounting structure according to claim 1, characterized in that: The thermostat assembly mounting flange surface (10) is connected to the thermostat assembly; the oil cooler and the cylinder body water return hole (9) are connected to the oil cooler water return pipe, the water output of the oil cooler water return pipe and the cylinder head is converged in the upper cavity, and the large circulating water flow is diverted through the lower cavity.

3. The engine thermostat mounting structure according to claim 1, characterized in that: The small circulation water outlet hole (2) is connected to the small circulation pipeline, and flow distribution is performed in the lower cavity.

4. The engine thermostat mounting structure according to claim 1, characterized in that: The degassing pipe mounting threaded holes (5) are arranged vertically.

5. The engine thermostat mounting structure according to any one of claims 1 to 4, characterized in that: The engine thermostat mounting structure is made of cast aluminum alloy material.

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