A cooling and lubricating system for a single-cylinder engine and a method of adapting the same

Abstract

The application relates to the technical field of engine testing, and particularly discloses a cooling and lubricating system for a single-cylinder engine, which comprises a cooling supply module and a lubricating supply module which are independently arranged and are both arranged outside the single-cylinder engine body; the cooling supply module and the single-cylinder engine body form an independent closed cooling circuit, the flow and pressure of the cooling liquid can be adjusted according to the test requirements; the lubricating supply module and the single-cylinder engine body form an independent closed lubricating circuit, the flow, pressure and lubricating supply position of the engine oil can be adjusted according to the test requirements; the cooling supply module and the lubricating supply module are both general modules, and one set of system can be adapted to multiple single-cylinder engines to complete test verification. The application adopts an external independent modular design, the cooling and lubricating circuits are isolated and independently controlled, the single-cylinder engine body does not need to be modified, the generality is high, disassembly, assembly and maintenance are convenient, the test equipment investment and R&D cost can be significantly reduced, and the efficiency and test precision of the single-cylinder engine bench test are improved.

Description

Technical Field

[0001] This invention relates to the field of engine testing technology, and in particular to a cooling and lubrication system for a single-cylinder engine and its adaptation method. Background Technology

[0002] In the field of engine technology research and development, single-cylinder engines are core testing devices for verifying various new technological solutions. They are widely used for testing the combustion chamber, intake and exhaust ports, combustion strategies, and the power performance and operating characteristics of various fuels (diesel, gasoline, hydrogen, methanol, ammonia, etc.). They are an indispensable key verification platform before the iterative upgrade of multi-cylinder engines. Currently, the cooling and lubrication systems of mainstream single-cylinder engines in the industry generally adopt an integrated design with the engine block. The cooling water circuit and lubrication oil circuit are directly integrated inside the cylinder block and cylinder head. Each system is custom-made for the corresponding single-cylinder engine, with fixed diameters and layouts. Under this model, the development of each new single-cylinder engine structure requires redesigning and machining a dedicated cooling and lubrication oil circuit, which not only significantly extends the test preparation cycle but also greatly increases the research and development costs and processing costs. At the same time, once the integrated flow channels are formed, they are difficult to change. If it is necessary to adjust the cooling or lubrication parameters to match different operating conditions, the cylinder block and cylinder head must be re-machined, which is complex and can easily cause irreversible damage to the engine structure.

[0003] Existing single-cylinder engine cooling and lubrication systems generally suffer from weak adjustability and poor versatility. Coolant flow rate, oil pressure, and lubrication points are mostly fixed designs, unable to be flexibly adapted to different single-cylinder engine models and test conditions, making it difficult to meet the differentiated needs of various technical solutions. Especially for single-cylinder engines equipped with complex mechanisms such as VVT and VVA, their lubrication pressure and oil supply positions differ significantly from conventional models. Fixed-parameter systems are prone to problems such as insufficient oil supply and pressure imbalance, directly affecting the reliability of moving parts and the accuracy of test data. Furthermore, the integrated structure requires the arrangement of large-sized main oil passages and main water passages within the single-cylinder engine, increasing the machining difficulty of the cylinder block and cylinder head and reducing structural layout flexibility. Parallel testing of multiple models requires multiple independent cooling and lubrication devices, occupying significant test bench space and increasing equipment investment, maintenance, and management costs, severely restricting the efficiency and flexibility of single-cylinder engine testing and verification.

[0004] The above background information is provided only to aid in understanding the concept and technical solution of this invention. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Summary of the Invention

[0005] The purpose of this invention is to propose a cooling and lubrication system for single-cylinder engines and its adaptation method, so as to solve the technical problems of the prior art, such as the inability of the cooling and lubrication system to be universally adapted to multiple single-cylinder engines in single-cylinder engine bench tests, complex structure, cumbersome operation and high adaptation cost.

[0006] Therefore, this invention proposes a cooling and lubrication system for a single-cylinder engine.

[0007] Preferably, the present invention may also have the following technical features:

[0008] A cooling and lubrication system for a single-cylinder engine includes a cooling supply module and a lubrication supply module that are independently arranged and are both located outside the single-cylinder engine body.

[0009] The cooling supply module is used to form an independent closed cooling circuit with the single-cylinder engine body, and can adjust the flow rate and pressure of the coolant according to the test requirements of the single-cylinder engine body.

[0010] The lubrication supply module is used to form an independent closed lubrication circuit with the single-cylinder engine body, and can adjust the flow rate, pressure and lubrication supply position of the oil according to the test requirements of the single-cylinder engine body.

[0011] The cooling supply module and lubrication supply module are universal modules, and one set can be adapted to multiple single-cylinder engines to complete the test verification.

[0012] Preferably, the cooling supply module includes a coolant tank, an electrically controlled water pump, and cooling pipes and connectors of various diameters; the coolant tank, the electrically controlled water pump, the cooling pipes and the cooling connectors are connected in sequence, and the cooling connectors are used to detachably connect to the single-cylinder engine body to form the independent closed cooling circuit.

[0013] Preferably, the lubrication supply module includes an electronically controlled oil pump, an oil distributor, and oil pipes and oil connectors of various diameters; the electronically controlled oil pump, oil distributor, oil pipes and oil connectors are connected in sequence, and the oil connectors can be arranged according to the lubrication points of the single-cylinder engine body for detachable connection with the single-cylinder engine body to form the independent closed lubrication circuit.

[0014] Preferably, the lubrication supply module further includes an oil cooler and an oil filter, wherein the oil cooler and the oil filter are connected in series between the electronically controlled oil pump and the oil distributor.

[0015] Preferably, the oil distributor is provided with multiple independent lubrication ports, each of which is used to connect to a corresponding oil pipeline.

[0016] Preferably, the system further includes a mounting bracket, on which both the cooling supply module and the lubrication supply module are fixedly mounted. The mounting bracket is used to connect to a single-cylinder engine test bench.

[0017] Preferably, both the cooling pipes and the oil pipes are flexible pipes, and both the cooling connectors and the oil connectors are quick-connect connectors.

[0018] Preferably, both the electronically controlled water pump and the electronically controlled oil pump have speed regulation functions, which can respectively realize fine adjustment of the flow rate and pressure of coolant and oil.

[0019] A method for adapting a cooling and lubrication system for single-cylinder bench testing is also provided, comprising the following steps:

[0020] S01. Independent Module Assembly: The cooling supply module and the lubrication supply module are assembled independently.

[0021] S02. Module docking with single-cylinder engine and forming a circuit: The assembled cooling supply module and lubrication supply module are docked with the single-cylinder engine body to be tested, so that the two modules are kept outside the single-cylinder engine body and form an independent closed cooling circuit and an independent closed lubrication circuit respectively.

[0022] S03. Parameter Adjustment and Bench Test Start-up: According to the test requirements of the single-cylinder engine body to be tested, adjust the coolant flow rate and pressure output by the cooling supply module, adjust the oil flow rate and pressure output by the lubrication supply module, and after confirming that the parameters of the two circuits are stable and there is no leakage, start the single-cylinder engine to carry out the bench test.

[0023] S04. General Adaptation Adjustment After Replacing a Single-Cylinder Engine: When it is necessary to replace the single-cylinder engine body with a different specification for testing, disassemble the original single-cylinder engine body and connect it with the cooling supply module and lubrication supply module, and make adaptation adjustments to the cooling supply module and lubrication supply module to complete the cooling and lubrication adaptation of the new single-cylinder engine body, so as to realize the bench test adaptation of one system for multiple single-cylinder engines.

[0024] The beneficial effects of this invention compared to the prior art include:

[0025] 1. This invention employs independent cooling and lubrication supply modules, each located outside the single-cylinder engine body. These modules form independent, closed cooling and lubrication circuits, respectively. They are universal modules adaptable to multiple single-cylinder engines. The independent configuration and complete circuit isolation of the two modules allow for independent adjustment of cooling and lubrication parameters without interference, preventing cross-contamination and significantly improving the accuracy and stability of cooling and lubrication control during bench testing. The external module placement eliminates the need for structural modifications to the single-cylinder engine body, preserving its testing accuracy. It also simplifies the engine body structure, reduces manufacturing costs, and makes module disassembly, maintenance, and replacement more convenient. The universal module design breaks away from the existing customized cooling and lubrication system model of one cooling and lubrication device per single-cylinder engine. One system can complete bench testing of multiple single-cylinder engines of different specifications, significantly reducing equipment investment, maintenance costs, and storage space, while improving equipment utilization. It perfectly meets the high-frequency, high-efficiency, and low-cost requirements of single-cylinder engine bench testing and is applicable to single-cylinder engines using various fuels such as diesel, gasoline, hydrogen, methanol, and ammonia.

[0026] 2. The cooling supply module of this invention adopts a structure in which a coolant storage tank, an electrically controlled water pump, and cooling pipes and connectors of various diameters are connected in sequence. The cooling connectors detachably connect to the single-cylinder engine body to form a complete closed cooling circuit. The structural design is simple and the circulation path is clear. It ensures a continuous and stable circulation of coolant to cool the single-cylinder engine, and allows for coarse adjustment of coolant flow and pressure by selecting different diameter pipes and connectors to adapt to the cooling needs of single-cylinder engines with different power and heat intensity. The detachable connection method further improves the assembly and replacement efficiency between the module and the single-cylinder engine.

[0027] 3. The lubrication supply module of the present invention adopts a structure in which an electronically controlled oil pump, an oil distributor, and oil pipes and oil connectors of various diameters are connected in sequence. The oil connectors can be flexibly arranged according to the lubrication points of a single-cylinder engine and can be disassembled and connected. This can form a complete closed lubrication circuit and ensure a stable supply of oil. It can also adapt to different lubrication needs through multiple specifications of pipes and connectors. At the same time, it can flexibly match the lubrication point layout of different single-cylinder engines, which enhances the system's universal adaptability to different single-cylinder engines. The detachable structure also facilitates the quick connection and replacement of the lubrication module.

[0028] 4. The oil distributor of the present invention is provided with multiple independent lubrication interfaces, each of which is connected to the corresponding oil pipeline, so as to realize independent supply of multiple oil lines. It can accurately supply oil to multiple lubrication points of a single-cylinder engine at the same time, and each branch does not interfere with each other. It can adapt to the differences in the number and position of lubrication points of different single-cylinder engines, avoid the problem of insufficient or excessive lubrication in some areas, and improve the uniformity and accuracy of lubrication.

[0029] 5. This invention integrates and fixes the cooling supply module and the lubrication supply module by mounting brackets and connects them to the test bench. This enables the overall installation, transportation and debugging of the two modules. The rigid brackets have sufficient strength and vibration resistance, which can effectively isolate the vibration of the single-cylinder engine and prevent pipeline loosening and leakage. At the same time, the module installation position can be finely adjusted, further improving the system's docking convenience and layout rationality.

[0030] 6. The adaptation method of the cooling and lubrication system of the present invention is simple, clear and easy to operate. Through the standardized process of independent module assembly, circuit formation, parameter adjustment test and replacement adaptation adjustment, the cooling and lubrication adaptation of single-cylinder engine bench test can be completed quickly. When changing to a single-cylinder engine of different specifications, only adaptation adjustment is required to reuse the system, which further strengthens the advantage of one system adapting to multiple single-cylinder engines, greatly improves bench test efficiency and reduces test costs and manpower input. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the first structure of a specific embodiment of the present invention.

[0032] Figure 2 This is a schematic diagram of the second structure of a specific embodiment of the present invention.

[0033] Figure 3 This is a flowchart of a second specific embodiment of the present invention.

[0034] Explanation of reference numerals in the attached drawings: 11-Single-cylinder engine block; 12-Oil pan; 21-Electrically controlled water pump; 22-Cooling connector; 23-Return water connector; 31-Electrically controlled oil pump; 32-Oil distributor; 33-Oil line; 34-Oil connector; 35-Oil cooler; 36-Oil filter; 41-Mounting bracket. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to specific embodiments and the accompanying drawings. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope or application of the present invention.

[0036] Non-limiting and non-exclusive embodiments will be described with reference to the following figures, wherein the same reference numerals denote the same parts unless otherwise specifically stated.

[0037] This invention discloses a cooling and lubrication system for single-cylinder engines and its adaptation method. It aims to solve the technical problems of existing single-cylinder engine bench tests, such as the inability of the cooling and lubrication system to be universally adapted to multiple single-cylinder engines, complex structure, cumbersome operation, and high adaptation cost. Through the design of external, independent cooling and lubrication dual modules, combined with multi-specification pipe joints and pump speed fine adjustment, a single system can be universally adapted to multiple single-cylinder engines of different specifications and fuel types to complete bench tests. The overall structure is simple, easy to adjust, and low in cost, making it very suitable for use in test scenarios.

[0038] Example 1:

[0039] This embodiment provides a cooling and lubrication system for a single-cylinder engine, such as... Figure 1 and 2 As shown, the entire system comprises an independently configured cooling supply module and a lubrication supply module. Both modules are located outside the single-cylinder engine body 11, without being rigidly connected to or driven by the engine body 11. They are only connected to the engine body 11 via pipelines to form a circulation loop. The cooling supply module forms an independent closed cooling loop with the engine body 11 and can adjust the flow rate and pressure of the coolant according to the testing requirements of the engine body 11. The lubrication supply module forms an independent closed lubrication loop with the engine body 11 and can adjust the flow rate and pressure of the coolant according to the testing requirements of the engine body 11. According to the test requirements of the single-cylinder engine body 11, the flow rate and pressure of the engine oil are adjusted. At the same time, it can be flexibly adapted to different lubrication points on the single-cylinder engine body 11 to achieve adjustable lubrication supply position. The cooling supply module and the lubrication supply module are general modules, not customized for a specific single-cylinder engine. Instead, by selecting the specifications of the pipeline and connectors and fine-tuning the pump speed, they can be matched with different single-cylinder engine bodies 11. This allows one system to be repeatedly used for bench testing and verification of multiple single-cylinder engines, fundamentally changing the existing technology of one cooling and lubrication device for one single-cylinder engine.

[0040] The two modules are independent of each other and their circuits are completely isolated. The coolant and engine oil do not come into contact with or interfere with each other, avoiding cross-contamination and allowing for independent parameter adjustment, significantly improving the accuracy of cooling and lubrication control during testing. Simultaneously, the external arrangement of the cooling and lubrication modules reduces the design of cooling and lubrication channels within the single-cylinder engine body 11, simplifying its structure and reducing manufacturing costs without affecting the testing accuracy of the single-cylinder engine itself. It also facilitates module disassembly, maintenance, and rapid replacement, perfectly meeting the high-frequency, high-efficiency, and low-cost requirements of bench testing. This system is compatible with single-cylinder engines using various fuels such as diesel, gasoline, hydrogen, methanol, and ammonia. Adaptation is achieved simply by replacing the corresponding pipes and connectors and fine-tuning the speed, making it widely applicable and highly versatile.

[0041] Specifically, such as Figure 1As shown, the cooling supply module in this embodiment specifically includes a coolant tank (not shown in the figure), an electrically controlled water pump 21, cooling pipes of various diameters (not shown in the figure), and a cooling connector 22. The coolant tank, the electrically controlled water pump 21, the cooling pipes, and the cooling connector 22 are connected sequentially. The cooling connector 22 is detachably connected to the single-cylinder engine body 11, thus forming the independent closed cooling circuit together with the internal cooling water channels of the single-cylinder engine. The coolant tank is used to store and replenish coolant, and its outlet is connected to the inlet of the electrically controlled water pump 21, which provides power for the coolant circulation. The outlet of the electrically controlled water pump 21 is connected to the cooling pipes, and the end of the cooling pipes is connected to the cooling connector 22, which is directly connected to the pre-set cooling inlet on the single-cylinder engine body 11. The cooling outlet of the single-cylinder engine is connected back to the coolant tank through a return pipe, forming a complete closed loop. In this example, both the cooling pipes and cooling connectors 22 are equipped with various diameter specifications. Matching specifications can be pre-selected based on the displacement, power, and heat intensity of the single-cylinder engine, enabling coarse adjustment of coolant flow and pressure. This eliminates the need for complex regulating valves, resulting in a simple and low-cost structure that perfectly meets the low-cost and easy-to-operate requirements of the testing scenario. The cooling connectors 22 feature a quick-connect structure for easy and rapid connection and disassembly, further improving the efficiency of single-cylinder engine replacement.

[0042] like Figure 1 As shown, the cooling supply module in this embodiment also includes a return water connector 23. The return water connector 23 is detachably connected to the cooling outlet of the single-cylinder engine body 11, and the return water connector 23 is connected to the inlet of the coolant storage tank through the return pipe. Combined with the aforementioned cooling connector 22, cooling pipes and other components, a complete cooling water circulation is formed: the coolant is output from the coolant storage tank, pressurized by the electronically controlled water pump 21, and enters the cooling water channel of the single-cylinder engine body 11 through the cooling pipe and cooling connector 22. After completing the cooling of the single-cylinder engine, it flows out from the cooling outlet of the single-cylinder engine and returns to the coolant storage tank through the return water connector 23 and the return pipe, realizing the recycling of coolant and ensuring the sealing and circulation stability of the cooling circuit.

[0043] Specifically, such as Figure 2As shown, the lubrication supply module of this embodiment includes an electronically controlled oil pump 31, an oil distributor 32, oil pipes 33 of various diameters and specifications, and an oil connector 34. The electronically controlled oil pump 31, the oil distributor 32, the oil pipes 33 and the oil connector 34 are connected in sequence. The oil connector 34 can be flexibly arranged according to the actual position of the lubrication points on the single-cylinder engine body 11 and can be detachably connected to the single-cylinder engine body 11 to form an independent closed lubrication circuit. The inlet of the electronically controlled oil pump 31 is connected to the oil pan 12 of the single-cylinder engine body 11, and is used to draw oil from the oil pan 12 to provide power for the entire lubrication circuit. To ensure oil quality and lubrication reliability, the lubrication supply module also includes an oil cooler 35 and an oil filter 36. The oil cooler 35 and the oil filter 36 are connected in series between the electronically controlled oil pump 31 and the oil distributor 32. That is, after the oil is output from the electronically controlled oil pump 31, it first enters the oil cooler 35 for cooling, and then passes through the oil filter 36 to filter out metal debris, impurities, etc., to ensure that the oil entering the oil distributor 32 has a suitable temperature and meets the cleanliness standard. After that, the oil enters the oil distributor 32, and then is delivered to each lubrication point of the single-cylinder engine through the oil pipeline 33 and the oil connector 34 to ensure that the oil entering the lubrication pair meets the lubrication requirements during the test. It should be noted that the oil line 33 mentioned in this embodiment specifically refers to the line between the oil distributor 32 and the oil connector 34. This section of oil line 33 can be replaced with different diameter specifications according to the test flow requirements. The connecting line between the electronically controlled oil pump 31, the oil cooler 35, the oil filter 36 and the oil distributor 32 only serves a normal connection function and usually does not need to be replaced with different specifications according to the flow requirements.

[0044] Furthermore, the oil distributor 32 is equipped with multiple independent lubrication ports, each corresponding to an oil line 33. This allows for simultaneous lubrication of multiple points in a single-cylinder engine, including the crankshaft, bearings, camshaft, and VVT or VVA mechanisms, without interference between the individual lines. Unused ports can be sealed with plugs to prevent leakage and air intake, adapting to the varying numbers and locations of lubrication points in different single-cylinder engines, truly achieving adjustable lubrication supply. The oil lines 33 and oil connectors 34 also feature a multi-diameter design, allowing for flexible selection based on the required oil flow at each lubrication point, maintaining a consistent and universal design philosophy with the cooling system.

[0045] In some examples of this embodiment, such as Figure 1 and 2As shown, to ensure a neat layout and stable installation of the entire system, the cooling and lubrication system in this embodiment is also equipped with a mounting bracket 41. Both the cooling supply module and the lubrication supply module are fixedly mounted on this mounting bracket 41, which is then fixedly connected to the single-cylinder engine test bench, forming a single unit that facilitates overall movement, installation, and debugging. The mounting bracket 41 adopts a rigid structure with sufficient strength and rigidity, effectively isolating vibrations generated during single-cylinder engine operation and preventing vibration transmission to the cooling and lubrication modules, which could lead to loosening of pipes or leakage at joints. Simultaneously, the mounting bracket 41 can be equipped with multiple sets of mounting holes, allowing for fine-tuning of the module height and horizontal position according to different single-cylinder engine interface locations, improving docking convenience and adaptability.

[0046] In this embodiment, both the cooling and oil lines are flexible, and both the cooling connector 22 and the oil connector 34 are quick-connect fittings. The flexible lines are bendable and deformable, compensating for installation errors, absorbing vibrations generated by the test bench and single-cylinder engine operation, preventing cracking or loosening due to stress concentration, and allowing for flexible route adjustments to adapt to different single-cylinder engine interface positions. The quick-connect fittings allow for tool-free insertion and removal, significantly shortening single-cylinder engine changeover time and reducing operational difficulty for test personnel. The fittings have an internal sealing structure to ensure circuit sealing and prevent coolant or oil leakage. The flexible lines are high-temperature resistant, oil-resistant, and corrosion-resistant, meeting the long-term requirements of continuous test bench testing. The fittings and lines are compatible in specifications, facilitating easy assembly and disassembly and ensuring reliable sealing.

[0047] To achieve precise fine-tuning of cooling and lubrication parameters, both the electronically controlled water pump 21 and the electronically controlled oil pump 31 in this embodiment have speed adjustment functions, which can respectively achieve fine-tuning of the flow rate and pressure of coolant and oil. In this embodiment, based on the test conditions of the single-cylinder engine, the required target values ​​of coolant and oil flow rate and pressure are determined through CAE simulation analysis. Then, based on the simulation results, pipes and connectors of corresponding diameters are selected to complete the coarse adjustment, so that the flow rate and pressure are initially close to the test requirements. On this basis, the coolant flow rate and pressure can be precisely corrected by adjusting the speed of the electronically controlled water pump 21, so that the cylinder temperature of the single-cylinder engine is stabilized within the test requirement range. Similarly, by adjusting the speed of the electronically controlled oil pump 31, the oil supply pressure and flow rate can be precisely controlled, and stable oil supply to each lubrication point can be achieved in conjunction with the oil distributor 32. The speed adjustment method is simple and reliable, requiring no complex electronic control system. Minor corrections can be made before or during testing, allowing the system to perfectly cover the cooling and lubrication needs of different single-cylinder engines and different working conditions through the combination of coarse adjustment with precise speed fine adjustment. It features high adjustment accuracy, simple operation, and low cost.

[0048] Example 2:

[0049] Based on the cooling and lubrication system described in Embodiment 1, this embodiment also provides an adaptation method for a cooling and lubrication system used in single-cylinder engine bench testing, combined with... Figures 1-3 The explanation includes the following steps:

[0050] S01. Independent module assembly: The cooling supply module and the lubrication supply module are assembled independently to ensure that the two modules are structurally independent and do not interfere with each other, and that the pipeline connections of each module are firm and reliably sealed.

[0051] S02. Module docking with single-cylinder engine and forming a loop: The assembled cooling supply module and lubrication supply module are docked with the single-cylinder engine body 11 to be tested, so that both modules are located outside the single-cylinder engine body 11 and form an independent closed cooling loop (between the cooling supply module and the single-cylinder engine body) and an independent closed lubrication loop (between the lubrication supply module and the single-cylinder engine body).

[0052] S03. Parameter Adjustment and Bench Test Start-up: According to the test requirements of the single-cylinder engine body 11 to be tested, adjust the coolant flow rate and pressure output by the cooling supply module, adjust the oil flow rate and pressure output by the lubrication supply module, and after confirming that the parameters of the two circuits are stable and there is no leakage, start the single-cylinder engine to carry out the bench test.

[0053] S04. General Adaptation Adjustment After Replacing a Single-Cylinder Engine: When it is necessary to replace the single-cylinder engine body 11 with a different specification for testing, disassemble the original single-cylinder engine body 11 and connect it with the cooling supply module and lubrication supply module, and make adaptation adjustments to the cooling supply module and lubrication supply module to complete the cooling and lubrication adaptation of the new single-cylinder engine body 11, so as to realize the bench test adaptation of one system to multiple single-cylinder engines.

[0054] Specifically, in step S01, when assembling the cooling supply module and the lubrication supply module, the following additional steps are also included: first, the target values ​​of coolant and oil flow rate and pressure required for the single-cylinder engine to be tested are determined through CAE simulation analysis; then, according to the target values, pipes and connectors with corresponding diameter specifications are selected; when assembling the lubrication supply module, the oil cooler 35 and the oil filter 36 are connected in series between the electronically controlled oil pump 31 and the oil distributor 32 to ensure that each connection is reliably sealed and without loosening.

[0055] Specifically, in step S02, when connecting the two supply modules to the single-cylinder engine body, the following additional steps are also included: using quick-connect connectors to quickly connect the cooling supply module, the lubrication supply module and the single-cylinder engine body 11, and at the same time connecting the reserved interface of the inlet of the electronic control oil pump 31 to the single-cylinder engine oil pan 12 through pipelines, using flexible pipelines to adjust the pipeline route and compensate for installation errors; after the connection is completed, a short trial run of 5 to 10 minutes is performed on the two independent closed circuits to confirm that there is no leakage in the circuits and the connection is reliable before proceeding to step S03.

[0056] Specifically, in step S03, the flow rate and pressure are precisely adjusted by regulating the speed of the electronically controlled water pump 21 and the electronically controlled oil pump 31; at the same time, the lubrication supply position is adjusted according to the number and position of the lubrication points on the single-cylinder engine body 11 to ensure that the oil supply to each lubrication point is uniform and accurate.

[0057] Specifically, in step S04, when adjusting the compatibility of the two supply modules, the following additional steps are also included: After stopping the machine, disconnect the original single-cylinder engine body 11 from the two supply modules by disassembling the quick-connect connector; according to the test requirements of the new single-cylinder engine body 11, re-determine the target value through CAE simulation analysis, replace the pipes and connectors with the corresponding diameter specifications, and fine-tune the speed of the electric water pump 21 and the electric oil pump 31; after re-connecting through the quick-connect connector, confirm that there is no leakage in the circuit and the parameters are stable, and the cooling and lubrication adaptation of the new single-cylinder engine body 11 can be completed.

[0058] Those skilled in the art will recognize that numerous variations are possible with respect to the above description, and the embodiments and figures are merely for describing one or more specific implementations.

[0059] Although exemplary embodiments of the invention have been described and illustrated, those skilled in the art will understand that various changes and substitutions can be made thereto without departing from the spirit of the invention. Furthermore, many modifications can be made to adapt specific situations to the doctrine of the invention without departing from the central concepts of the invention described herein. Therefore, the invention is not limited to the specific embodiments disclosed herein, but may include all embodiments and equivalents that fall within the scope of the invention.

Claims

1. A cooling and lubrication system for a single-cylinder engine, characterized in that, The cooling supply module and lubrication supply module are independently set up and are both located outside the single-cylinder engine body; The cooling supply module is used to form an independent closed cooling circuit with the single-cylinder engine body, and can adjust the flow rate and pressure of the coolant according to the test requirements of the single-cylinder engine body. The lubrication supply module is used to form an independent closed lubrication circuit with the single-cylinder engine body, and can adjust the flow rate, pressure and lubrication supply position of the oil according to the test requirements of the single-cylinder engine body. The cooling supply module and lubrication supply module are universal modules, and one set can be adapted to multiple single-cylinder engines to complete the test verification.

2. The cooling and lubrication system for a single-cylinder engine according to claim 1, characterized in that, The cooling supply module includes a coolant tank, an electrically controlled water pump, and cooling pipes and connectors of various diameters; the coolant tank, the electrically controlled water pump, the cooling pipes and the cooling connectors are connected in sequence, and the cooling connectors are used to detachably connect to the single-cylinder engine body to form the independent closed cooling circuit.

3. The cooling and lubrication system for a single-cylinder engine according to claim 1, characterized in that, The lubrication supply module includes an electronically controlled oil pump, an oil distributor, and oil pipes and oil connectors of various diameters. The electronically controlled oil pump, oil distributor, oil pipes, and oil connectors are connected in sequence. The oil connectors can be arranged according to the lubrication points of the single-cylinder engine body and are used to detachably connect with the single-cylinder engine body to form the independent closed lubrication circuit.

4. The cooling and lubrication system for a single-cylinder engine according to claim 3, characterized in that, The lubrication supply module also includes an oil cooler and an oil filter, which are connected in series between the electronically controlled oil pump and the oil distributor.

5. The cooling and lubrication system for a single-cylinder engine according to claim 3, characterized in that, The oil distributor is equipped with multiple independent lubrication ports, each of which is used to connect to a corresponding oil line.

6. The cooling and lubrication system for a single-cylinder engine according to claim 1, characterized in that, It also includes a mounting bracket, on which both the cooling supply module and the lubrication supply module are fixedly mounted. The mounting bracket is used to connect to a single-cylinder engine test bench.

7. The cooling and lubrication system for a single-cylinder engine according to claim 1, characterized in that, Both the cooling pipes and the oil pipes are flexible pipes, and both the cooling connectors and the oil connectors are quick-connect connectors.

8. The cooling and lubrication system for a single-cylinder engine according to claim 1, characterized in that, Both the electronically controlled water pump and the electronically controlled oil pump have speed regulation functions, which can respectively realize fine adjustment of the flow rate and pressure of coolant and oil.

9. A method for adapting a cooling and lubrication system for single-cylinder engine bench testing as described in claim 1, characterized in that, Includes the following steps: S01. Independent Module Assembly: The cooling supply module and the lubrication supply module are assembled independently. S02. Module docking with single-cylinder engine and forming a circuit: The assembled cooling supply module and lubrication supply module are docked with the single-cylinder engine body to be tested, so that the two modules are kept outside the single-cylinder engine body and form an independent closed cooling circuit and an independent closed lubrication circuit respectively. S03. Parameter Adjustment and Bench Test Start-up: According to the test requirements of the single-cylinder engine body to be tested, adjust the coolant flow rate and pressure output by the cooling supply module, adjust the oil flow rate and pressure output by the lubrication supply module, and after confirming that the parameters of the two circuits are stable and there is no leakage, start the single-cylinder engine to carry out the bench test. S04. General Adaptation Adjustment After Replacing a Single-Cylinder Engine: When it is necessary to replace the single-cylinder engine body with a different specification for testing, disassemble the original single-cylinder engine body and connect it with the cooling supply module and lubrication supply module, and make adaptation adjustments to the cooling supply module and lubrication supply module to complete the cooling and lubrication adaptation of the new single-cylinder engine body, so as to realize the bench test adaptation of one system for multiple single-cylinder engines.

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