Lubrication system, lubrication system control method, and vehicle

Abstract

The application discloses a lubricating system, a lubricating system control method and a vehicle, and relates to the technical field of vehicle lubricating systems, wherein the lubricating system comprises an engine box body, a gearbox box body, a first pipeline assembly and a second pipeline assembly; the engine box body is provided with a first inner cavity; the gearbox box body is provided with a second inner cavity used for storing lubricating oil; the first pipeline assembly is connected with the first inner cavity and the second inner cavity, and is used for pumping the lubricating oil in the first inner cavity to the second inner cavity; and the second pipeline assembly is used for distributing the lubricating oil in the second inner cavity to an engine oil passage and a gearbox oil passage. The technical scheme provided by the application integrates the engine lubricating system and the gearbox lubricating system into one set of lubricating system, stores the lubricating oil in the second inner cavity, cancels the function of storing the lubricating oil in the first inner cavity, thereby reducing the size of the engine box body, improving the integration of the vehicle engine and the gearbox, and improving the power assembly mounting property.

Description

Technical Field

[0001] This invention relates to the field of vehicle lubrication system technology, and in particular to a lubrication system, a lubrication system control method, and a vehicle. Background Technology

[0002] In gasoline-powered vehicles, the engine and transmission are typically located in the engine compartment, with the transmission's input shaft connected to the engine crankshaft via a flange. In hybrid vehicles, the engine crankshaft output shaft is also connected to the input shaft of the alternator or electric drive transmission via a flange. Generally, an engine consists of an oil pan, lower cylinder block, cylinder block, cylinder head, and cylinder cover, from bottom to top. The engine block needs to accommodate the crankshaft, pistons, connecting rods, and valve train in the vertical direction, so there's limited room for significant vertical compression. The transmission, electric drive system, and alternator, typically composed of motors and gears, offer greater flexibility in the vertical direction. Therefore, in the overall vehicle engine compartment layout, the engine is generally the bottleneck in terms of height.

[0003] Therefore, the dimensions of the engine in the height direction affect the powertrain's performance. Summary of the Invention

[0004] The main objective of this invention is to provide a lubrication system, a lubrication system control method, and a vehicle, particularly a lubrication system designed to improve the compatibility of powertrains (engine and transmission).

[0005] To achieve the above objectives, the lubrication system proposed in this invention includes: an engine housing, a transmission housing, a first piping assembly, and a second piping assembly; the engine housing has a first inner cavity; the transmission housing has a second inner cavity for storing lubricating oil; the first piping assembly connects the first inner cavity and the second inner cavity for drawing the lubricating oil in the first inner cavity to the second inner cavity; the second piping assembly is used to distribute the lubricating oil in the second inner cavity to engine oil passages and transmission oil passages.

[0006] In one embodiment, the engine housing has a first opening at the bottom, the first opening communicating with the first inner cavity, and the gearbox housing has a second opening, the second opening communicating with the second inner cavity;

[0007] The first piping assembly includes:

[0008] A connecting pipe connects the first opening and the second opening;

[0009] The first oil pump is located on the connecting pipe.

[0010] In one embodiment, the gearbox housing is provided with a third opening, the third opening communicating with the second inner cavity;

[0011] The second piping assembly includes:

[0012] A three-way distribution valve has an inlet and a first outlet and a second outlet, wherein the inlet is connected to at least one of the first outlet and the second outlet.

[0013] The main pipe is connected at one end to the third opening and at the other end to the liquid inlet;

[0014] The first branch pipe has one end connected to the first liquid outlet and the other end used to connect to the engine oil passage;

[0015] The second branch pipe has one end connected to the second liquid outlet and the other end used to connect to the gearbox oil passage;

[0016] The second oil pump is located in the main pipe.

[0017] In one embodiment, the second piping assembly further includes a first pressure sensor and a second pressure sensor, which are respectively disposed in the first branch pipe and the second branch pipe;

[0018] The lubrication system also includes a controller, which is electrically connected to the first pressure sensor, the second pressure sensor, and the three-way distribution valve.

[0019] In one embodiment, the first pipeline assembly further includes a third pressure sensor disposed in the connecting pipe and located between the first opening and the first oil pump, and at a lower position in the direction of gravity; the controller is electrically connected to the third pressure sensor and the first oil pump respectively.

[0020] In one embodiment, the second oil pump is configured as an electronic pump;

[0021] The step of adjusting the pressure in the first branch pipe by adjusting the operating parameters of the three-way distribution valve and / or the second oil pump includes:

[0022] After adjusting the three-way distribution valve to achieve a preset ratio between the flow rates of the first outlet and the second outlet, adjust the power of the second oil pump so that the difference between the value detected by the first pressure sensor and the target pressure parameter is within the preset threshold.

[0023] The present invention also proposes a lubrication system control method, which is based on a lubrication system and includes:

[0024] Obtain the engine's real-time speed;

[0025] The target pressure parameters corresponding to the first branch pipe are determined based on the real-time rotation speed.

[0026] When the difference between the value detected by the first pressure sensor and the target pressure parameter exceeds a preset threshold, the pressure in the first branch pipe is adjusted accordingly.

[0027] In one embodiment, the step of adjusting the pressure within the first branch pipe includes:

[0028] The pressure in the first branch pipe is adjusted by regulating the operating parameters of the three-way distribution valve and / or the second oil pump.

[0029] In one embodiment, the second oil pump is configured as an electronic pump;

[0030] The step of adjusting the pressure in the first branch pipe by adjusting the operating parameters of the three-way distribution valve and / or the second oil pump includes:

[0031] After adjusting the three-way distribution valve to achieve a preset ratio between the flow rates of the first outlet and the second outlet, adjust the power of the second oil pump so that the difference between the value detected by the first pressure sensor and the target pressure parameter is within the preset threshold.

[0032] The present invention also proposes a vehicle comprising a lubrication system, the lubrication system comprising: an engine housing, a transmission housing, a first piping assembly, and a second piping assembly; the engine housing having a first inner cavity; the transmission housing having a second inner cavity for storing lubricating oil; the first piping assembly connecting the first inner cavity and the second inner cavity for drawing the lubricating oil in the first inner cavity to the second inner cavity; and the second piping assembly for distributing the lubricating oil in the second inner cavity to engine oil passages and transmission oil passages.

[0033] The overall design concept of the technical solution of the present invention is as follows: the first inner cavity of the engine housing is connected to the second inner cavity of the transmission housing, and the lubrication system of the engine and the lubrication system of the transmission are integrated into a single lubrication system. The second inner cavity of the transmission housing is a container for storing lubricating oil, and the first inner cavity of the engine housing eliminates the function of storing lubricating oil. Therefore, the first inner cavity of the engine housing is designed to be smaller, thereby reducing the size of the engine and making the engine installation volume smaller. This allows it to be adapted to more vehicles with size requirements, improving the powertrain's compatibility. Specifically, the lubricating oil is stored in the second inner cavity of the transmission housing. The second pipeline assembly is used to distribute the lubricating oil in the second inner cavity to the engine oil passage and the transmission oil passage. The lubricating oil that passes through the transmission oil passage lubricates the gear components in the transmission housing and then returns to the bottom of the second inner cavity of the transmission. The lubricating oil that passes through the engine oil passage lubricates the components in the engine housing and then returns to the bottom of the first inner cavity of the engine. Since the first inner cavity of the engine no longer has an oil storage function, a first pipeline assembly is provided. The first pipeline assembly connects the first inner cavity and the second inner cavity to draw the lubricating oil in the first inner cavity to the second inner cavity, thus completing one cycle of lubricating oil. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0035] Figure 1 A schematic diagram of an embodiment of the lubrication system provided by the present invention;

[0036] Figure 2 This is a flowchart illustrating the first embodiment of the lubrication system control method of the present invention;

[0037] Figure 3 This is a flowchart illustrating a second embodiment of the lubrication system control method of the present invention;

[0038] Figure 4 This is a flowchart illustrating the third embodiment of the lubrication system control method of the present invention.

[0039] Explanation of icon numbers:

[0040] 100. Lubrication system; 1. Engine housing; 11. First inner cavity; 12. First opening; 2. Gearbox housing; 21. Second inner cavity; 22. Second opening; 23. Third opening; 3. First piping assembly; 31. Connecting pipe; 32. First oil pump; 33. Third pressure sensor; 4. Second piping assembly; 41. Three-way distributor valve; 42. Main pipe; 43. First branch pipe; 44. Second branch pipe; 45. Second oil pump; 46. First pressure sensor; 47. Second pressure sensor.

[0041] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0043] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0044] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0045] In gasoline-powered vehicles, the engine and transmission are typically located in the engine compartment, with the transmission's input shaft connected to the engine crankshaft via a flange. In hybrid vehicles, the engine crankshaft output shaft is also connected to the input shaft of the alternator or electric drive transmission via a flange. Generally, an engine consists of an oil pan, lower cylinder block, cylinder block, cylinder head, and cylinder cover, from bottom to top. The engine block needs to accommodate the crankshaft, pistons, connecting rods, and valve train in the vertical direction, so there's limited room for significant vertical compression. The transmission, electric drive system, and alternator, typically composed of motors and gears, offer greater flexibility in the vertical direction. Therefore, in the overall vehicle engine compartment layout, the engine is generally the bottleneck in terms of height.

[0046] Therefore, the dimensions of the engine in the height direction affect the powertrain's performance.

[0047] This invention proposes a lubrication system. Please refer to [link / reference]. Figure 1 In one embodiment of the present invention, the lubrication system 100 includes: an engine housing 1, a transmission housing 2, a first pipeline assembly 3, and a second pipeline assembly 4; the engine housing 1 has a first inner cavity 11; the transmission housing 2 has a second inner cavity 21 for storing lubricating oil; the first pipeline assembly 3 connects the first inner cavity 11 and the second inner cavity 21 for drawing the lubricating oil in the first inner cavity 11 to the second inner cavity 21; the second pipeline assembly 4 is used to distribute the lubricating oil in the second inner cavity 21 to the engine oil passage and the transmission oil passage.

[0048] The overall design concept of the technical solution of the present invention is to connect the first inner cavity 11 of the engine housing 1 with the second inner cavity 21 of the transmission housing 2, and integrate the lubrication system of the engine and the lubrication system of the transmission in the prior art into a lubrication system 100. The second inner cavity 21 of the transmission housing 2 is used to store lubricating oil, and the first inner cavity 11 of the engine housing 1 is not used to store lubricating oil. Therefore, the first inner cavity 11 of the engine housing 1 is designed to be smaller, thereby reducing the size of the engine and making the installation volume of the engine smaller. This allows it to be adapted to more vehicles with size requirements and improves the powertrain's compatibility. Specifically, the lubricating oil is stored in the second inner cavity 21 of the transmission housing 2. The second pipeline assembly 4 is used to distribute the lubricating oil in the second inner cavity 21 to the engine oil passage and the transmission oil passage. The lubricating oil that passes through the transmission oil passage lubricates the gear components in the transmission housing and then returns to the bottom of the second inner cavity 21 of the transmission. The lubricating oil that passes through the engine oil passage lubricates the components in the engine housing and then returns to the bottom of the first inner cavity 11 of the engine. Since the first inner cavity 11 of the engine housing 1 no longer has an oil storage function, a first pipeline assembly 3 is provided. The first pipeline assembly 3 connects the first inner cavity 11 and the second inner cavity 21 to draw the lubricating oil in the first inner cavity 11 to the second inner cavity 21, thus completing one cycle of lubricating oil.

[0049] To pump the lubricating oil from the first inner cavity 11 to the second inner cavity 21, a first opening 12 is provided on the engine housing 1. To ensure all lubricating oil is pumped into the second inner cavity 21, the first opening 12 is located at the bottom of the engine housing 1. The gearbox housing 2 has a second opening 22, which connects to the second inner cavity 21. The first pipeline assembly 3 includes a connecting pipe 31 and a first oil pump 32. The connecting pipe 31 connects the first opening 12 and the second opening 22. Since the installation position of the first opening 12 is not necessarily higher than that of the second opening 22, the first oil pump 32 is located on the connecting pipe 31 to provide power for the flow of lubricating oil, ensuring that the lubricating oil at the bottom of the engine housing is pumped into the second inner cavity 21. This prevents crankshaft oil churning under various extreme engine operating conditions, thereby reducing engine oil consumption. Another advantage of this design is that after a vehicle rolls over, the lubricating oil in the first inner cavity 11 will not flow into the combustion chamber, which would damage the engine connecting rod piston due to the incompressibility of the lubricating oil.

[0050] In order to distribute the lubricating oil in the second inner cavity 21 to the engine oil passage and the transmission oil passage, it is necessary to divert the main pipe 42 and distribute the amount of lubricating oil flowing to the engine oil passage and the transmission oil passage. In one embodiment, the transmission housing 2 is provided with a third opening 23, which connects to the second inner cavity 21; the second pipeline assembly 4 includes: a three-way distribution valve 41, a main pipe 42, a first branch pipe 43, a second branch pipe 44, and a second oil pump 45; the three-way distribution valve 41 has an inlet and a first outlet and a second outlet, the inlet being connected to at least one of the first outlet and the second outlet; one end of the main pipe 42 is connected to the third opening 23, and the other end is connected to the inlet; one end of the first branch pipe 43 is connected to the first outlet, and the other end is used to connect to the engine oil passage; one end of the second branch pipe 44 is connected to the second outlet, and the other end is used to connect to the transmission oil passage; the second oil pump 45 is disposed on the main pipe 42 for pumping lubricating oil to the transmission oil passage and the engine oil passage. Among them, the three-way distribution valve 41 can not only connect the main pipe 42 with the first branch pipe 43 and the second branch pipe 44 to achieve flow diversion, but also regulate the flow and pressure of lubricating oil pumped to the gearbox oil passage and engine oil passage.

[0051] In engines, there are specific requirements for the flow rate and pressure of lubricating oil because it plays a crucial role, including lubrication, cooling, cleaning, sealing, and corrosion prevention. The flow rate and pressure of the lubricating oil directly affect the effective execution of these functions, thus impacting the normal operation and lifespan of the engine. For lubrication: Lubricating oil forms an oil film on the surfaces of moving parts of the engine, reducing direct metal-to-metal contact and lowering friction and wear. If the lubricating oil flow is insufficient, the oil film may not form evenly, leading to increased friction and accelerated wear. Conversely, excessive flow may result in excessively high oil pressure, increasing energy consumption and potentially causing leaks. Therefore, it is necessary to monitor and regulate the flow rate and pressure of the lubricating oil in the engine's oil passages in real time. For corrosion prevention: The engine's lubrication system typically consists of an oil pump, oil passages, filters, and monitoring devices to ensure that the lubricating oil circulates at the appropriate pressure and flow rate. If the lubricating oil pressure is below the specified value, it may lead to insufficient lubrication, increasing wear and the risk of failure. Excessive pressure may cause seal failure and oil seal damage, increasing oil consumption and potential mechanical failures. Therefore, it is also necessary to keep the flow and pressure of lubricating oil in the engine oil passages within a set range.

[0052] To understand and adjust the flow and pressure of lubricating oil pumped to the transmission oil passages and engine oil passages, the second piping assembly 4 also includes a first pressure sensor 46 and a second pressure sensor 47, respectively located in the first branch pipe 43 and the second branch pipe 44 (the first branch pipe 43 has the same diameter as the engine oil passage, and the pressure detected by the first pressure sensor 46 in the first branch pipe 43 is the pressure of the engine oil passage; the second branch pipe 44 has the same diameter as the transmission oil passage, and the pressure detected by the second pressure sensor 47 in the second branch pipe 44 is the pressure of the transmission oil passage); to automatically realize the feedback of pressure and flow signals, and automatically adjust the pressure and flow, the lubrication system 100 also includes a controller, which is electrically connected to the first pressure sensor 46, the second pressure sensor 47, and the three-way distribution valve 41. The three-way distribution valve 41 can not only distribute the lubricating oil pumped to the transmission oil passage and engine oil passage by adjusting the opening size of the valves at the first and second outlets, but also, when the flow rate of lubricating oil in the main pipe 42 is constant, adjust the flow rate of lubricating oil pumped to the engine oil passage accordingly by adjusting the opening size of the valves at the first and second outlets, so that the pressure in the first branch pipe 43 reaches the preset pressure value. This ensures that the lubricating oil in the engine performs its lubricating, cooling, cleaning, sealing, and rust-preventing functions.

[0053] To prevent lubricating oil from accumulating at the bottom of the first inner cavity 11, the first pipeline assembly 3 also includes a third pressure sensor 33. The third pressure sensor 33 is disposed in the connecting pipe 31, located between the first opening 12 and the first oil pump 32, and positioned at a lower position in the direction of gravity. The controller is electrically connected to both the third pressure sensor 33 and the first oil pump 32. When the third pressure sensor 33 detects a pressure value reaching a certain level, it indicates the presence of lubricating oil at the bottom of the first inner cavity 11. At this time, the first oil pump 32 is activated to pump the lubricating oil from the bottom of the first inner cavity 11 into the second inner cavity 21.

[0054] The second oil pump inlet 23 is below the oil level to ensure that lubricating oil can be drawn in, while the opening 22 is above the liquid level to prevent lubricating oil in the gearbox housing 2 from flowing back into the engine housing 1 when the machine is stopped.

[0055] To ensure that the flow rate of lubricating oil pumped to the engine oil passages achieves the preset pressure value (the pressure within the engine oil passages is determined by the first pressure sensor 46 detecting the pressure in the first branch pipe 43, which has the same diameter as the engine oil passage; or the pipe diameters are set in a certain proportion to ensure a corresponding pressure, and the controller calculates the engine oil passage pressure), this invention also proposes a lubrication system control method based on the lubrication system 100. Furthermore, the second oil pump 45 can be configured as either a mechanical oil pump or an electronic oil pump. To ensure that lubricating oil is pumped to the engine oil passages in both configurations, and that the difference between the value detected by the first pressure sensor 46 and the target pressure parameter is within the preset threshold value, this invention also proposes a lubrication system control method.

[0056] The steps of the lubrication system control method are as follows: Figure 2 , Figure 2 This is a schematic flowchart of a first embodiment of a lubrication system control method according to the present invention.

[0057] The lubrication system control method is based on the lubrication system 100, and the lubrication system control method includes:

[0058] S1: Obtain the real-time engine speed;

[0059] S2: Determine the target pressure parameter corresponding to the first branch pipe 43 based on the real-time rotation speed;

[0060] S3: When the difference between the value detected by the first pressure sensor 46 and the target pressure parameter exceeds a preset threshold, the pressure in the first branch pipe 43 is adjusted accordingly.

[0061] During engine operation, the engine's demand for lubricating oil pressure varies with its rotational speed. Therefore, the controller sets a corresponding preset pressure value for each engine speed range. In the lubrication system control method, the engine speed is first acquired, and then the pressure detection value of the engine oil passage at that speed is compared with the target pressure value of the engine oil passage to determine whether the pressure of the engine oil passage needs to be adjusted. If adjustment is required, the pressure of the engine oil passage is adjusted accordingly.

[0062] The following adjustment methods are available for regulating the pressure in the engine oil passages:

[0063] The steps of the lubrication system control method are as follows: Figure 3 , Figure 3 This is a flowchart illustrating a second embodiment of a lubrication system control method according to the present invention.

[0064] The step of adjusting the pressure in the first branch pipe 43 includes:

[0065] S30: Adjust the pressure in the first branch pipe 43 by adjusting the operating parameters of the three-way distribution valve 41 and / or the second oil pump 45.

[0066] Specifically: When the power of the second oil pump 45 remains constant, the flow rate ratio of the three-way distribution valve 41 at the first outlet to the second outlet is adjusted so that the difference between the value detected by the first pressure sensor 46 and the target pressure parameter is within the preset threshold. When the flow rate ratio of the three-way distribution valve 41 at the first outlet to the second outlet remains constant, the power of the second oil pump 45 is adjusted so that the difference between the value detected by the first pressure sensor 46 and the target pressure parameter is within the preset threshold. Alternatively, the power of the second oil pump 45 and the flow rate ratio of the three-way distribution valve 41 at the first outlet to the second outlet are simultaneously adjusted so that the difference between the value detected by the first pressure sensor 46 and the target pressure parameter is within the preset threshold.

[0067] The specific adjustment method needs to be determined based on the actual situation of the second oil pump 45. For example, if the second oil pump 45 is set as an electronic pump, the corresponding adjustment method is as follows:

[0068] The steps of the lubrication system control method are as follows: Figure 4 , Figure 4 This is a flowchart illustrating a third embodiment of a lubrication system control method according to the present invention.

[0069] The step of adjusting the pressure in the first branch pipe 43 by adjusting the operating parameters of the three-way distribution valve 41 and / or the second oil pump 45 includes:

[0070] S300: Adjust the three-way distribution valve 41. After the flow ratio of the first outlet to the second outlet reaches a preset ratio, adjust the power of the second oil pump 45 so that the difference between the detection value of the first pressure sensor 46 and the target pressure parameter is within the preset threshold.

[0071] First, the valve openings of the three-way distributor valve 41 at the first and second outlets need to be adjusted to ensure sufficient lubricating oil circulation within the transmission oil lines, guaranteeing proper lubrication. However, after adjusting the valve openings of the three-way distributor valve 41 at the first and second outlets, the pressure within the engine oil lines may not meet the requirements: if the difference between the value detected by the first pressure sensor 46 and the target pressure parameter exceeds a preset threshold, and the value detected by the first pressure sensor 46 is greater than the target pressure parameter, the power of the second oil pump 45 is reduced; if the difference between the value detected by the first pressure sensor 46 and the target pressure parameter exceeds a preset threshold, and the value detected by the first pressure sensor 46 is less than the target pressure parameter, the power of the second oil pump 45 is increased; if the difference between the value detected by the first pressure sensor 46 and the target pressure parameter does not exceed the preset threshold, then the power of the second oil pump 45 does not need to be adjusted.

[0072] In another embodiment, the second oil pump 45 is configured as a mechanical pump. The second oil pump 45 should not be arbitrarily adjusted. Therefore, the steps of adjusting the flow ratio of the three-way distribution valve 41 at the first outlet to the second outlet, and / or adjusting the power of the second oil pump 45, to ensure that the pressure in the first branch pipe 43 reaches the preset pressure value, include:

[0073] Adjust the flow rate ratio of the three-way distribution valve 41 at the first outlet and the second outlet so that the pressure in the first branch pipe 43 reaches the preset pressure value.

[0074] During the adjustment process of the three-way distribution valve 41, the flow rates of the first and second outlets are inversely proportional. This requires the three-way distribution valve 41 to have a wide adjustable range while ensuring sufficient lubricating oil in the transmission oil lines. Therefore, the mechanical pump must have sufficient power to simultaneously meet the lubricating oil flow and pressure requirements of both the engine and the transmission.

[0075] The present invention also proposes a vehicle including a lubrication system 100. The specific structure of the lubrication system 100 is as described in the above embodiments. Since the lubrication system control method adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. The lubrication system 100 includes: an engine housing 1, a transmission housing 2, a first pipeline assembly 3, and a second pipeline assembly 4; the engine housing 1 has a first inner cavity 11; the transmission housing 2 has a second inner cavity 21, which is used to store lubricating oil; the first pipeline assembly 3 connects the first inner cavity 11 and the second inner cavity 21, and is used to draw the lubricating oil in the first inner cavity 11 to the second inner cavity 21; the second pipeline assembly 4 is used to distribute the lubricating oil in the second inner cavity 21 to the engine oil passage and the transmission oil passage.

[0076] This vehicle features a smaller engine, which may lower the vehicle's center of gravity, improving driving stability, especially when cornering or driving at high speeds. A lower center of gravity may also improve the vehicle's handling, making driving easier, especially during emergency obstacle avoidance. The smaller engine design also facilitates a streamlined body shape, thereby reducing air resistance and improving fuel economy.

[0077] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A lubrication system control method, applied to a lubrication system, characterized in that, The lubrication system includes: An engine housing has a first inner cavity and a first opening, the first opening being located at the bottom of the engine housing and communicating with the first inner cavity; The gearbox housing has a second inner cavity, a second opening, and a third opening, wherein the second opening and the third opening are respectively connected to the second inner cavity, and the second inner cavity is used to store lubricating oil. A first pipeline assembly has a connecting pipe and a first oil pump. The connecting pipe connects the first opening and the second opening. The first oil pump is disposed on the connecting pipe to pump the lubricating oil in the first inner cavity to the second inner cavity. The second piping assembly includes a three-way distribution valve, a main pipe, a first branch pipe, a second branch pipe, and a second oil pump. The three-way distribution valve has an inlet, a first outlet, and a second outlet, with the inlet communicating with at least one of the first and second outlets. One end of the main pipe is connected to the third opening, and the other end is connected to the inlet. One end of the first branch pipe is connected to the first outlet, and the other end is used to connect to the engine oil passage. One end of the second branch pipe is connected to the second outlet, and the other end is used to connect to the transmission oil passage. The second oil pump is disposed on the main pipe and is used to distribute the lubricating oil in the second inner cavity to the engine oil passage and the transmission oil passage. The second oil pump is configured as an electric pump. The second pipeline assembly further includes a first pressure sensor and a second pressure sensor, which are respectively disposed in the first branch pipe and the second branch pipe; the first pipeline assembly further includes a third pressure sensor, which is disposed in the connecting pipe and located between the first opening and the first oil pump, and is located at a lower position in the direction of gravity; the lubrication system further includes a controller, which is electrically connected to the first pressure sensor, the second pressure sensor, the third pressure sensor, the three-way distribution valve, and the first oil pump. The lubrication system control method includes: Obtain the engine's real-time speed; The target pressure parameters corresponding to the first branch pipe are determined based on the real-time rotation speed. When the difference between the value detected by the first pressure sensor and the target pressure parameter exceeds a preset threshold, the three-way distribution valve is adjusted. After the flow ratio between the first outlet and the second outlet reaches a preset ratio, the power of the second oil pump is adjusted so that the difference between the value detected by the first pressure sensor and the target pressure parameter is within the preset threshold.

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