Single cylinder machine bench cooling system

Abstract

The present invention provides a single-cylinder engine bench cooling system, which includes: a plate heat exchanger; a water distribution chamber, the water inlet end of the water distribution chamber is connected to the outlet end of the plate heat exchanger; a water collecting chamber, the water inlet end of the water collecting chamber is connected to the water outlet end of the water distribution chamber, and a plurality of cooling branches are arranged between the water collecting chamber and the water distribution chamber; an electric water pump, the inlet end of the electric water pump is connected to the water outlet end of the water collecting chamber, the outlet end of the electric water pump is connected to the inlet end of the plate heat exchanger, and the electric water pump is used to adjust the flow of cooling water. By applying the technical solution of the present invention, the flow of cooling water of the single-cylinder engine bench cooling system is adjusted by the electric water pump, and the requirements of cooling water at different cooling positions are met by multiple cooling branches, so as to ensure that different cooling positions of the single-cylinder engine have suitable cooling water. By adopting the single-cylinder engine bench cooling system, the technical effect of studying the influence of different cooling positions and different flow rates on engine performance is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a single-cylinder engine stand cooling system. Background Art

[0002] Gasoline single-cylinder engines occupy an important position in the development of gasoline engine forward-looking technology with their flexible matching. At the same time, as the thermal efficiency of the engine becomes higher and higher, the influence of various boundary conditions on the thermal efficiency of the engine becomes more and more sensitive. About 30% of the heat put into the cylinder by the gasoline engine is taken away by the cooling water. As the pursuit of engine thermal efficiency becomes higher and higher, whether the heat taken away by the engine cooling can reduce the impact on the thermal efficiency of the engine is becoming more and more important. However, the cooling system of the existing gasoline single-cylinder engine test bench adopts the traditional cooling mode. The cooling water enters the single-cylinder engine from one inlet and leaves the single-cylinder engine from one outlet. This mode can only ensure that the place where the single-cylinder engine needs to be cooled works in a flow mode, and it is impossible to study the influence of different cooling positions and different flow rates on engine performance. Summary of the invention

[0003] The main purpose of the present invention is to provide a single-cylinder engine bench cooling system to solve the problem that the cooling system of the gasoline engine single-cylinder engine bench in the prior art cannot study the effects of different cooling positions and different flow rates on engine performance.

[0004] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a single-cylinder machine stand cooling system is provided, comprising: a plate heat exchanger; a water distribution chamber, the water inlet end of the water distribution chamber is connected to the outlet end of the plate heat exchanger; a water collecting chamber, the water inlet end of the water collecting chamber is connected to the water outlet end of the water distribution chamber, and a plurality of cooling branches are arranged between the water collecting chamber and the water distribution chamber; an electric water pump, the inlet end of the electric water pump is connected to the water outlet end of the water collecting chamber, the outlet end of the electric water pump is connected to the inlet end of the plate heat exchanger, and the electric water pump is used to adjust the flow rate of cooling water.

[0005] Furthermore, the single-cylinder machine stand cooling system also includes: a constant temperature system, which is arranged in parallel with the constant temperature system to exchange heat with the plate heat exchanger, a first flow regulating valve is arranged on the pipeline between the plate heat exchanger and the water distribution chamber, and a second flow regulating valve is arranged on the pipeline between the water collecting chamber and the electric water pump.

[0006] Furthermore, the single-cylinder machine stand cooling system also includes: a bleed water pipe, which is arranged on the pipeline between the plate heat exchanger and the first flow regulating valve, and the bleed water pipe is connected to the expansion water tank, and the expansion water tank is connected to the inlet end of the electric water pump through a pipeline.

[0007] Furthermore, the plurality of cooling branches include a first branch, the first branch is provided with a cylinder head water jacket, a third flow regulating valve is provided between the water distribution chamber and the cylinder head water jacket, and a fourth flow regulating valve is provided between the cylinder head water jacket and the water collecting chamber.

[0008] Furthermore, the multiple cooling branches include a second branch, the second branch is provided with a cylinder head lower water jacket, a fifth flow regulating valve is provided between the water distribution chamber and the cylinder head lower water jacket, and a sixth flow regulating valve is provided between the cylinder head lower water jacket and the water collecting chamber.

[0009] Furthermore, the plurality of cooling branches include a third branch, the third branch is provided with a cylinder water jacket, a seventh flow regulating valve is provided between the water distribution chamber and the cylinder water jacket, and an eighth flow regulating valve is provided between the cylinder water jacket and the water collecting chamber.

[0010] Furthermore, a first temperature sensor and a first pressure sensor are provided between the third flow regulating valve and the water jacket on the cylinder head, and a second temperature sensor and a second pressure sensor are provided between the water jacket on the cylinder head and the fourth flow regulating valve.

[0011] Furthermore, a third temperature sensor and a third pressure sensor are provided between the fifth flow regulating valve and the lower water jacket of the cylinder head, and a fourth temperature sensor and a fourth pressure sensor are provided between the lower water jacket of the cylinder head and the sixth flow regulating valve.

[0012] Furthermore, a fifth temperature sensor and a fifth pressure sensor are provided between the seventh flow regulating valve and the cylinder water jacket, and a sixth temperature sensor and a sixth pressure sensor are provided between the cylinder water jacket and the eighth flow regulating valve.

[0013] Furthermore, the water-dividing chamber is provided with a first air-release valve, and the water-collecting chamber is provided with a second air-release valve.

[0014] By applying the technical solution of the present invention, the flow rate of cooling water in the cooling system of the single-cylinder engine bench is adjusted by an electric water pump, and the requirements of cooling water at different cooling positions are met through multiple cooling branches, ensuring that suitable cooling water is available at different cooling positions of the single-cylinder engine. The single-cylinder engine bench cooling system is used to achieve the technical effect of studying the influence of different cooling positions and different flow rates on engine performance, thereby better designing the entire engine cooling system, ensuring that the engine works in the best cooling state, and ensuring the normal circulation of cooling water with the least energy usage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0016] Figure 1A structural schematic diagram of an embodiment of a single-cylinder machine stand cooling system according to the present invention is shown.

[0017] The above drawings include the following reference numerals:

[0018] 1. Constant temperature system; 2. Plate heat exchanger; 3. First flow regulating valve; 4. Water distribution chamber; 5. First air release valve; 6. Seventh flow regulating valve; 7. Fifth flow regulating valve; 8. Third flow regulating valve; 9. Fifth temperature sensor;

[0019] 10. Fifth pressure sensor; 11. Third temperature sensor; 12. Third pressure sensor; 13. First temperature sensor; 14. First pressure sensor; 15. Cylinder water jacket; 16. Cylinder head lower water jacket; 17. Cylinder head upper water jacket; 18. Sixth temperature sensor; 19. Sixth pressure sensor;

[0020] 20. Fourth temperature sensor; 21. Fourth pressure sensor; 22. Second temperature sensor; 23. Second pressure sensor; 24. Fourth flow control valve; 25. Sixth flow control valve; 26. Eighth flow control valve; 27. Water collecting chamber; 28. Second air release valve; 29. ​​Second flow control valve;

[0021] 30. Vent pipe; 31. Expansion tank; 32. Electric water pump. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0025] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of the layers and regions may be enlarged, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0026] Combination Figure 1 As shown, according to a specific embodiment of the present application, a single-cylinder machine stand cooling system is provided.

[0027] Specifically, Figure 1 As shown, the single-cylinder machine stand cooling system includes a plate heat exchanger 2, a water distribution chamber 4, a water collection chamber 27 and an electric water pump 32. The water inlet end of the water distribution chamber 4 is connected to the outlet end of the plate heat exchanger 2, the water inlet end of the water collection chamber 27 is connected to the water outlet end of the water distribution chamber 4, a plurality of cooling branches are arranged between the water collection chamber 27 and the water distribution chamber 4, the inlet end of the electric water pump 32 is connected to the water outlet end of the water collection chamber 27, the outlet end of the electric water pump 32 is connected to the inlet end of the plate heat exchanger 2, and the electric water pump 32 is used to adjust the flow of cooling water.

[0028] By applying the technical solution of this embodiment, the flow rate of cooling water in the cooling system of the single-cylinder engine bench is adjusted by the electric water pump 32, and the requirements of cooling water at different cooling positions are met through multiple cooling branches, ensuring that suitable cooling water is available at different cooling positions of the single-cylinder engine. By adopting the single-cylinder engine bench cooling system, the technical effect of studying the influence of different cooling positions and different flow rates on engine performance is achieved, so as to better design the entire engine cooling system, ensure that the engine works in the best cooling state, and ensure the normal circulation of cooling water with the least energy consumption.

[0029] Furthermore, the single-cylinder engine stand cooling system also includes a thermostatic system 1, which is arranged in parallel with the thermostatic system 1 to perform heat exchange with the plate heat exchanger 2, thereby ensuring that the working temperature of the cooling water is within a set range. A first flow regulating valve 3 is arranged on the pipeline between the plate heat exchanger 2 and the water distribution chamber 4, and a second flow regulating valve 29 is arranged on the pipeline between the water collection chamber 27 and the electric water pump 32. The water inlet flow from the plate heat exchanger 2 into the water distribution chamber 4 is adjusted by the first flow regulating valve 3, and the water outlet flow from the water collection chamber 27 to the plate heat exchanger 2 is adjusted by the second flow regulating valve 29, so as to further achieve the technical effect of studying the influence of different flow rates on engine performance.

[0030] The single-cylinder machine stand cooling system further includes a bleed water pipe 30, which is arranged on the pipeline between the plate heat exchanger 2 and the first flow regulating valve 3, and is connected to the expansion water tank 31, and the expansion water tank 31 is connected to the inlet end of the electric water pump 32 through a pipeline. This arrangement allows the coolant passing through the bleed water pipe 30 to re-enter the cooling water cycle, and the air in the cooling water cycle is discharged into the atmosphere through the expansion water tank 31, and the expansion water tank 31 plays a role in replenishing the circulating cooling water.

[0031] Specifically, the plurality of cooling branches include a first branch, the first branch is provided with a cylinder head water jacket 17, a third flow regulating valve 8 is provided between the water dividing chamber 4 and the cylinder head water jacket 17, and a fourth flow regulating valve 24 is provided between the cylinder head water jacket 17 and the water collecting chamber 27. The third flow regulating valve 8 is used to regulate the water inflow from the water dividing chamber 4 to the cylinder head water jacket 17, and the fourth flow regulating valve 24 is used to regulate the water outflow from the cylinder head water jacket 17 to the water collecting chamber 27, thereby ensuring that there is a suitable cooling water flow at the cylinder head water jacket 17, and solving the problem that the traditional single-cylinder engine can only have one cooling water flow and cannot meet the different cooling water requirements of different cooling positions.

[0032] Further, the plurality of cooling branches include a second branch, the second branch is provided with a cylinder head lower water jacket 16, a fifth flow regulating valve 7 is provided between the water dividing chamber 4 and the cylinder head lower water jacket 16, and a sixth flow regulating valve 25 is provided between the cylinder head lower water jacket 16 and the water collecting chamber 27. The inlet flow of water flowing from the water dividing chamber 4 into the cylinder head lower water jacket 16 is regulated by the fifth flow regulating valve 7, and the outlet flow of water flowing from the cylinder head lower water jacket 16 to the water collecting chamber 27 is regulated by the sixth flow regulating valve 25, thereby ensuring that there is a suitable cooling water flow at the cylinder head lower water jacket 16.

[0033] Further, the plurality of cooling branches include a third branch, the third branch is provided with a cylinder water jacket 15, a seventh flow regulating valve 6 is provided between the water dividing chamber 4 and the cylinder water jacket 15, and an eighth flow regulating valve 26 is provided between the cylinder water jacket 15 and the water collecting chamber 27. The seventh flow regulating valve 6 is used to regulate the water inflow from the water dividing chamber 4 to the cylinder water jacket 15, and the eighth flow regulating valve 26 is used to regulate the water outflow from the cylinder water jacket 15 to the water collecting chamber 27, thereby ensuring that there is a suitable cooling water flow at the cylinder water jacket 15.

[0034] In another specific embodiment of the present application, more cooling branches may be added between the water distribution chamber 4 and the water collection chamber 27, and the number of cooling branches is set according to actual cooling requirements.

[0035] Specifically, a first temperature sensor 13 and a first pressure sensor 14 are provided between the third flow regulating valve 8 and the cylinder head upper water jacket 17, and a second temperature sensor 22 and a second pressure sensor 23 are provided between the cylinder head upper water jacket 17 and the fourth flow regulating valve 24. The first temperature sensor 13 and the first pressure sensor 14 can detect the inlet temperature and the inlet pressure of the cooling water flowing from the water dividing chamber 4 into the cylinder head upper water jacket 17, and the second temperature sensor 22 and the second pressure sensor 23 can detect the outlet temperature and the outlet pressure of the cooling water flowing from the cylinder head upper water jacket 17 to the water collecting chamber 27, thereby achieving the purpose of detecting the cooling state and the flow state of the cooling water on the first branch.

[0036] Among them, a third temperature sensor 11 and a third pressure sensor 12 are arranged between the fifth flow regulating valve 7 and the cylinder head lower water jacket 16, and a fourth temperature sensor 20 and a fourth pressure sensor 21 are arranged between the cylinder head lower water jacket 16 and the sixth flow regulating valve 25. The third temperature sensor 11 and the third pressure sensor 12 can detect the inlet temperature and the inlet pressure of the cooling water flowing from the water dividing chamber 4 into the cylinder head lower water jacket 16, and the fourth temperature sensor 20 and the fourth pressure sensor 21 can detect the outlet temperature and the outlet pressure of the cooling water flowing out from the cylinder head lower water jacket 16 to the water collecting chamber 27, thereby achieving the purpose of detecting the cooling state and the flow state of the cooling water on the second branch.

[0037] Furthermore, a fifth temperature sensor 9 and a fifth pressure sensor 10 are provided between the seventh flow regulating valve 6 and the cylinder water jacket 15, and a sixth temperature sensor 18 and a sixth pressure sensor 19 are provided between the cylinder water jacket 15 and the eighth flow regulating valve 26. The fifth temperature sensor 9 and the fifth pressure sensor 10 can detect the inlet temperature and the inlet pressure of the cooling water flowing from the water dividing chamber 4 into the cylinder water jacket 15, and the fourth temperature sensor 20 and the fourth pressure sensor 21 can detect the outlet temperature and the outlet pressure of the cooling water flowing out of the cylinder water jacket 15 into the water collecting chamber 27, thereby achieving the purpose of detecting the cooling state and the flow state of the cooling water on the third branch.

[0038] Furthermore, the water diversion chamber 4 is provided with a first air release valve 5, and the water collection chamber 27 is provided with a second air release valve 28. Specifically, the first air release valve 5 is used to exhaust the air in the water diversion chamber 4, and the second air release valve 28 is used to exhaust the air in the water collection chamber 27, thereby ensuring the cooling effect of the cooling water.

[0039] By adopting the technical solution of the present application, the cooling water of the cooling system of the single-cylinder machine stand is circulated as a whole by the electric water pump 32, and the purpose of regulating the flow rate of the cooling water is achieved by the electric water pump 32. The plate heat exchanger 2 is used to exchange heat with the constant temperature system 1 to ensure that the working temperature of the cooling water is within the set range. The cooling water is then allowed to enter the water distribution chamber 4 through the plate heat exchanger 2, and the air in the water distribution chamber 4 is emptied through the first air release valve 5 to further ensure the cooling effect of the cooling water. Three cooling branches are separated from the water distribution chamber 4 and then connected to the water collection chamber 27. The air in the water collecting chamber 27 is emptied through the second vent valve 28 to further ensure the cooling effect of the cooling water. The cooling water flowing out of the water collecting chamber 27 flows back to the plate heat exchanger 2 through the electric water pump 32 to complete the cooling water circulation. The vent pipe 30 is installed on the outlet pipeline of the plate heat exchanger 2, and the vent pipe 30 is connected to the expansion water tank to ensure that the coolant passing through the vent pipe 30 re-enters the cooling water circulation. At the same time, the air in the cooling water circulation is discharged into the atmosphere through the expansion water tank 31. The expansion water tank 31 also plays the role of replenishing the circulating cooling water. The single-cylinder engine stand cooling system has a simple structure and can meet the requirements of different cooling positions for cooling water, ensuring that different cooling positions of the single-cylinder engine can have suitable cooling water, and can verify the minimum requirements of different cooling positions for the engine cooling water flow rate, which is conducive to better design of the entire engine cooling system, ensuring that the engine works in the best cooling state, and can ensure the normal circulation of cooling water with the least energy used, thereby improving the practicality and reliability of the single-cylinder engine stand cooling system.

[0040] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0041] In addition to the above, it should be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of the present invention.

[0042] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A single-cylinder machine stand cooling system, characterized in that: include: Plate heat exchanger (2); A water separation chamber (4), wherein the water inlet end of the water separation chamber (4) is connected to the outlet end of the plate heat exchanger (2); A water collecting chamber (27), wherein a water inlet end of the water collecting chamber (27) is connected to a water outlet end of the water dividing chamber (4), and a plurality of cooling branches are arranged between the water collecting chamber (27) and the water dividing chamber (4); an electric water pump (32), wherein the inlet end of the electric water pump (32) is connected to the water outlet end of the water collecting chamber (27), and the outlet end of the electric water pump (32) is connected to the inlet end of the plate heat exchanger (2), and the electric water pump (32) is used to adjust the flow rate of cooling water; The plurality of cooling branches include a first branch, a second branch, and a third branch. The first branch is provided with a cylinder head upper water jacket (17), the second branch is provided with a cylinder head lower water jacket (16), and the third branch is provided with a cylinder body water jacket (15). Each of the cooling branches is provided with a flow regulating valve.

2. The single-cylinder machine stand cooling system according to claim 1, characterized in that: The single-cylinder machine stand cooling system also includes: A constant temperature system (1), wherein the constant temperature system (1) is arranged in parallel with the plate heat exchanger (2) to perform heat exchange with the plate heat exchanger (2), a first flow regulating valve (3) is arranged on the pipeline between the plate heat exchanger (2) and the water distribution chamber (4), and a second flow regulating valve (29) is arranged on the pipeline between the water collection chamber (27) and the electric water pump (32).

3. The single-cylinder machine stand cooling system according to claim 2, characterized in that: The single-cylinder machine stand cooling system also includes: A bleed water pipe (30), the bleed water pipe (30) being arranged on a pipeline between the plate heat exchanger (2) and the first flow regulating valve (3), the bleed water pipe (30) being connected to an expansion water tank (31), and the expansion water tank (31) being connected to an inlet end of the electric water pump (32) via a pipeline.

4. The single-cylinder machine stand cooling system according to any one of claims 1 to 3, characterized in that: A third flow regulating valve (8) is provided between the water distribution chamber (4) and the cylinder head upper water jacket (17), and a fourth flow regulating valve (24) is provided between the cylinder head upper water jacket (17) and the water collecting chamber (27).

5. The single-cylinder machine stand cooling system according to any one of claims 1 to 3, characterized in that: A fifth flow regulating valve (7) is provided between the water diversion chamber (4) and the cylinder head lower water jacket (16), and a sixth flow regulating valve (25) is provided between the cylinder head lower water jacket (16) and the water collecting chamber (27).

6. The single-cylinder machine stand cooling system according to any one of claims 1 to 3, characterized in that: A seventh flow regulating valve (6) is provided between the water distribution chamber (4) and the cylinder water jacket (15), and an eighth flow regulating valve (26) is provided between the cylinder water jacket (15) and the water collecting chamber (27).

7. The single-cylinder machine stand cooling system according to claim 4, characterized in that: A first temperature sensor (13) and a first pressure sensor (14) are provided between the third flow regulating valve (8) and the cylinder head upper water jacket (17), and a second temperature sensor (22) and a second pressure sensor (23) are provided between the cylinder head upper water jacket (17) and the fourth flow regulating valve (24).

8. The single-cylinder machine stand cooling system according to claim 5, characterized in that: A third temperature sensor (11) and a third pressure sensor (12) are provided between the fifth flow regulating valve (7) and the cylinder head lower water jacket (16), and a fourth temperature sensor (20) and a fourth pressure sensor (21) are provided between the cylinder head lower water jacket (16) and the sixth flow regulating valve (25).

9. The single-cylinder machine stand cooling system according to claim 6, characterized in that: A fifth temperature sensor (9) and a fifth pressure sensor (10) are provided between the seventh flow regulating valve (6) and the cylinder water jacket (15), and a sixth temperature sensor (18) and a sixth pressure sensor (19) are provided between the cylinder water jacket (15) and the eighth flow regulating valve (26).

10. The single-cylinder machine stand cooling system according to claim 1, characterized in that: The water distribution chamber (4) is provided with a first air release valve (5), and the water collection chamber (27) is provided with a second air release valve (28).

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