Lubricating system, lubricating system control method and vehicle

Abstract

The invention discloses a lubricating system, a lubricating system control method and a vehicle, and relates to the technical field of vehicle lubricating systems.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 body is provided with a second inner cavity, and the second inner cavity is used for storing lubricating oil; the first pipeline assembly is communicated with the first inner cavity and the second inner cavity and is used for pumping the lubricating oil in the first inner cavity into the second inner cavity; the second pipeline assembly is used for distributing the lubricating oil in the second inner cavity to an engine oil duct and a gearbox oil duct. According to the technical scheme, an engine lubricating system and a gearbox lubricating system are integrated into one set of lubricating system, the second inner cavity is used for storing lubricating oil, and the function of storing the lubricating oil in the first inner cavity is omitted, so that the size of an engine box body is reduced, the integration degree of a vehicle engine and a gearbox is improved, and the carrying performance of a power assembly is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle lubrication systems, and in particular to a lubrication system, a lubrication system control method and a vehicle. Background Art

[0002] Fuel vehicles generally have engines and gearboxes in the engine compartment, and the gearbox power input shaft is connected to the engine crankshaft through a flange. For hybrid vehicles, the engine crankshaft output shaft is also connected to the input shaft of the generator or electric drive gearbox through a flange. Generally, the engine is composed of an oil pan, a lower cylinder block, a cylinder block, a cylinder head, a cylinder cover, etc. from bottom to top. The height direction of the engine body needs to accommodate the crankshaft, piston, connecting rod, valve mechanism, etc., so the engine cannot be compressed too much in the height direction. The gearbox, electric drive, generator, etc. are generally composed of motors, gears, etc., and are more flexible in the height direction. Therefore, in the layout of the entire vehicle cabin, in the height direction, the engine is generally the bottleneck in the height layout.

[0003] Therefore, the height dimension of the engine affects the mounting performance of the powertrain. Summary of the invention

[0004] The main purpose of the present invention is to provide a lubrication system, a lubrication system control method and a vehicle, and in particular to a lubrication system, which is intended to improve the loadability of a powertrain (engine and gearbox).

[0005] To achieve the above-mentioned purpose, the lubrication system proposed in the present invention includes: an engine case, a gearbox case, a first pipeline assembly and a second pipeline assembly; the engine case has a first inner cavity; the gearbox case has a second inner cavity, and the second inner cavity is used to store lubricating oil; the first pipeline assembly connects the first inner cavity and the second inner cavity to pump the lubricating oil in the first inner cavity to the second inner cavity; the second pipeline assembly is used to distribute the lubricating oil in the second inner cavity to the engine oil channel and the gearbox oil channel.

[0006] In one embodiment, the bottom of the engine housing is provided with a first opening, the first opening is connected to the first inner cavity, and the gearbox housing is provided with a second opening, the second opening is connected to the second inner cavity;

[0007] The first pipeline assembly comprises:

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

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

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

[0011] The second pipeline assembly comprises:

[0012] A three-way distributing valve having a liquid inlet and a first liquid outlet and a second liquid outlet, wherein the liquid inlet is in communication with at least one of the first liquid outlet and the second liquid outlet;

[0013] A main pipe, one end of which is connected to the third opening, and the other end of which is connected to the liquid inlet;

[0014] a first branch pipe, one end of which is connected to the first liquid outlet and the other end of which is used to connect to the engine oil passage;

[0015] a second branch pipe, one end of which is connected to the second liquid outlet and the other end of which is used to connect to the gearbox oil passage;

[0016] The second oil pump is arranged on the main pipe.

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

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

[0019] In one embodiment, the first pipeline assembly also includes a third pressure sensor, which is arranged in the connecting pipe and is located between the first opening and the first oil pump and at a low 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 working parameters of the three-way distribution valve and / or the second oil pump comprises:

[0022] The three-way distributing valve is adjusted, and after the flow ratio between the first liquid outlet and the second liquid outlet reaches a preset ratio, the power of the second oil pump is adjusted so that the difference between the detection value of the first pressure sensor and the target pressure parameter is within the preset threshold.

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

[0024] Get the real-time speed of the engine;

[0025] Determine a target pressure parameter corresponding to the first branch pipe according to the real-time rotation speed;

[0026] When the difference between the detection value of 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 correspondingly adjusting the pressure in the first branch pipe comprises:

[0028] The pressure in the first branch pipe is adjusted by adjusting the working 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 working parameters of the three-way distribution valve and / or the second oil pump comprises:

[0031] The three-way distributing valve is adjusted, and after the flow ratio between the first liquid outlet and the second liquid outlet reaches a preset ratio, the power of the second oil pump is adjusted so that the difference between the detection value of the first pressure sensor and the target pressure parameter is within the preset threshold.

[0032] The present invention also proposes a vehicle, which includes a lubrication system, and the lubrication system includes: an engine case, a transmission case, a first pipeline assembly and a second pipeline assembly; the engine case has a first inner cavity; the transmission case has a second inner cavity, and the second inner cavity is used to store lubricating oil; 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; the second pipeline assembly is used to distribute the lubricating oil in the second inner cavity to the engine oil channel and the transmission oil channel.

[0033] The overall design concept of the technical solution of the present invention is: connecting the first inner cavity of the engine case with the second inner cavity of the gearbox case, integrating the lubrication system of the engine and the lubrication system of the gearbox in the prior art into one lubrication system, wherein the second inner cavity of the gearbox case is a container for storing lubricating oil, and the first inner cavity of the engine case cancels the function of storing lubricating oil. Therefore, the first inner cavity of the engine case is made smaller during design, thereby reducing the size of the engine and making the installation volume of the engine smaller, so that it can be adapted to more vehicles with volume requirements, thereby improving the carryability of the powertrain. Specifically, the lubricating oil is stored in the second inner cavity of the gearbox case, and the second pipeline assembly is used to distribute the lubricating oil in the second inner cavity to the engine oil channel and the gearbox oil channel. The lubricating oil passing through the gearbox oil channel lubricates the gear components in the gearbox case and then returns to the bottom of the second inner cavity of the gearbox. The lubricating oil passing through the engine oil channel lubricates the components in the engine case 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 pump the lubricating oil in the first inner cavity to the second inner cavity, thereby completing a cycle of the lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

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

[0036] Figure 2 It is a flow chart of a first embodiment of a lubrication system control method of the present invention;

[0037] Figure 3 It is a flow chart of a second embodiment of the lubrication system control method of the present invention;

[0038] Figure 4 It is a flow chart of the third embodiment of the lubrication system control method of the present invention.

[0039] Description of Figure Numbers:

[0040] 100. Lubrication system; 1. Engine housing; 11. First inner cavity; 12. First opening; 2. Transmission housing; 21. Second inner cavity; 22. Second opening; 23. Third opening; 3. First pipeline assembly; 31. Connecting pipe; 32. First oil pump; 33. Third pressure sensor; 4. Second pipeline assembly; 41. Three-way distribution 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 purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[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 position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0044] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0045] Fuel vehicles generally have engines and gearboxes in the engine compartment, and the gearbox power input shaft is connected to the engine crankshaft through a flange. For hybrid vehicles, the engine crankshaft output shaft is also connected to the input shaft of the generator or electric drive gearbox through a flange. Generally, the engine is composed of an oil pan, a lower cylinder block, a cylinder block, a cylinder head, a cylinder cover, etc. from bottom to top. The height direction of the engine body needs to accommodate the crankshaft, piston, connecting rod, valve mechanism, etc., so the engine cannot be compressed too much in the height direction. The gearbox, electric drive, generator, etc. are generally composed of motors, gears, etc., and are more flexible in the height direction. Therefore, in the layout of the entire vehicle cabin, in the height direction, the engine is generally the bottleneck in the height layout.

[0046] Therefore, the height dimension of the engine affects the mounting performance of the powertrain.

[0047] The present invention provides a lubrication system. Figure 1 In one embodiment of the present invention, the lubrication system 100 includes: an engine case 1, a gearbox case 2, a first pipeline assembly 3 and a second pipeline assembly 4; the engine case 1 has a first inner cavity 11; the gearbox case 2 has a second inner cavity 21, and the second inner cavity 21 is used to store lubricating oil; the first pipeline assembly 3 connects the first inner cavity 11 and the second inner cavity 21 to pump 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 channel and the gearbox oil channel.

[0048] The overall design concept of the technical solution of the present invention is to connect the first inner cavity 11 of the engine case 1 with the second inner cavity 21 of the gearbox case 2, and integrate the lubrication system of the engine and the lubrication system of the gearbox in the prior art into a lubrication system 100, wherein the second inner cavity 21 of the gearbox case 2 is used to store lubricating oil, and the first inner cavity 11 of the engine case 1 cancels the function of storing lubricating oil. Therefore, the first inner cavity 11 of the engine case 1 is made smaller during design, thereby reducing the size of the engine and making the installation volume of the engine smaller, so that it can be adapted to more vehicles with volume requirements, thereby improving the carryability of the powertrain. Specifically, the lubricating oil is stored in the second inner cavity 21 of the gearbox case 2. The second pipeline assembly 4 is used to distribute the lubricating oil in the second inner cavity 21 to the engine oil channel and the gearbox oil channel. The lubricating oil passing through the gearbox oil channel lubricates the gear components in the gearbox case and then returns to the bottom of the second inner cavity 21 of the gearbox. The lubricating oil passing through the engine oil channel lubricates the components in the engine case and then returns to the bottom of the first inner cavity 11 of the engine. Since the first inner cavity 11 of the engine case 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 pump the lubricating oil in the first inner cavity 11 to the second inner cavity 21, thereby completing a lubricating oil cycle.

[0049] In order to pump the lubricating oil in the first inner cavity 11 to the second inner cavity 21, a first opening 12 is provided on the engine case 1. In order to allow the lubricating oil to be completely pumped into the second inner cavity 21, the first opening 12 is provided at the bottom of the engine case 1; the gearbox case 2 is provided with a second opening 22, the second opening 22 is connected 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 is connected to the first opening 12 and the second opening 22; since the installation position of the first opening 12 is not necessarily higher than the position of the second opening 22, in order to allow the lubricating oil to flow from the first opening 12 to the second opening 22 along the connecting pipe 31, the first oil pump 32 is provided on the connecting pipe 31 to provide power for the flow of the lubricating oil. And it is ensured that the lubricating oil at the bottom of the engine case can be pumped to the second inner cavity 21, so that the crankshaft will not stir the oil under various extreme working conditions of the engine, thereby reducing the engine oil consumption. Such an arrangement has another advantage. After the vehicle rolls over, the lubricating oil in the first inner cavity 11 will not flow into the combustion chamber, thereby preventing the engine connecting rod piston from being damaged because the lubricating oil is incompressible.

[0050] In order to distribute the lubricating oil in the second inner cavity 21 to the engine oil passage and the gearbox 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 gearbox oil passage. In one embodiment, the gearbox housing 2 is provided with a third opening 23, and the third opening 23 is connected 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 a liquid inlet and a first liquid outlet and a second liquid outlet, and the liquid inlet is connected to at least one of the first liquid outlet and the second liquid outlet; one end of the main pipe 42 is connected to the third opening 23, and the other end is connected to the liquid inlet; one end of the first branch pipe 43 is connected to the first liquid 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 liquid outlet, and the other end is used to connect to the gearbox oil passage; the second oil pump 45 is provided on the main pipe 42, and is used to pump the lubricating oil to the gearbox oil passage and the engine oil passage. 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 adjust the flow and pressure of the lubricating oil pumped to the transmission oil channel and the engine oil channel.

[0051] In the engine, there are specific requirements for the flow and pressure of lubricating oil. This is because lubricating oil plays an important role in the engine, including lubrication, cooling, cleaning, sealing and anti-corrosion. The flow and pressure of lubricating oil directly affect the effective execution of these functions, which in turn is related to the normal operation and life of the engine. For lubrication: Lubricating oil forms an oil film on the surface of the moving parts of the engine, reducing direct metal contact, friction and wear. If the flow of lubricating oil is insufficient, the oil film may not be formed evenly, resulting in increased friction and accelerated wear. On the contrary, if the flow is too large, it may cause excessive oil pressure, increase energy consumption, and may cause leakage problems. Therefore, it is necessary to be able to grasp the flow and pressure of lubricating oil in the engine oil channel in real time and be able to regulate it. For anti-corrosion: The lubrication system of the engine usually consists of an oil pump, oil channel, filter and monitoring device to ensure that the lubricating oil circulates at an appropriate pressure and flow. If the lubricating oil pressure is lower than the specified value, it may cause insufficient lubrication, increase wear and failure risks. Excessive pressure may cause seal failure and oil seal damage, increase fuel consumption and potential mechanical failure. Therefore, it is also necessary to maintain the flow and pressure of the lubricating oil in the engine oil channel within a set range.

[0052] In order to understand and adjust the flow and pressure of the lubricating oil pumped to the transmission oil channel and the engine oil channel, the second pipeline assembly 4 also includes a first pressure sensor 46 and a second pressure sensor 47, which are respectively arranged 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 channel, and the pressure in the first branch pipe 43 detected by the first pressure sensor 46 is the pressure of the engine oil channel; the second branch pipe 44 has the same diameter as the transmission oil channel, and the pressure in the second branch pipe 44 detected by the second pressure sensor 47 is the pressure of the transmission oil channel); in order 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 adjust the opening size of the valve at the first and second liquid outlets to adjust the ratio of the lubricating oil pumped to the gearbox oil channel and the engine oil channel, but also adjust the opening size of the valve at the first and second liquid outlets to adjust the lubricating oil flow pumped to the engine oil channel to make the pressure in the first branch pipe 43 reach a preset pressure value when the flow rate of the lubricating oil in the main pipe 42 is constant, thereby ensuring the lubricating, cooling, cleaning, sealing and anti-corrosion effects of the lubricating oil in the engine.

[0053] In order to ensure that lubricating oil does not accumulate at the bottom of the first inner cavity 11, the first pipeline assembly 3 further includes a third pressure sensor 33, which is arranged in the connecting pipe 31, and is located between the first opening 12 and the first oil pump 32, and is located at a low position in the gravity direction; the controller is electrically connected to the third pressure sensor 33 and the first oil pump 32 respectively. When the third pressure sensor 33 detects that the pressure value reaches a certain pressure value, it indicates that there is a certain amount of lubricating oil at the bottom of the first inner cavity 11, and at this time, the first oil pump 32 is started to pump the lubricating oil at the bottom of the first inner cavity 11 into the second inner cavity 21.

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

[0055] In order to ensure that the flow rate of lubricating oil pumped to the engine oil channel makes the pressure in the engine oil channel (the first branch pipe 43 has the same diameter as the engine oil channel, and the pressure in the first branch pipe 43 detected by the first pressure sensor 46 is the pressure of the engine oil channel; or the pipe diameters are set in a certain proportion, so that the corresponding pressures are in a corresponding proportion, and then the pressure of the engine oil channel is calculated by the controller) reaches a preset pressure value, the present invention also proposes a lubrication system control method, which is based on the lubrication system 100. In addition, the second oil pump 45 can be set as a mechanical oil pump and an electronic oil pump, in order to achieve that the lubricating oil can be pumped to the engine oil channel in both settings, and the difference between the detection value of the first pressure sensor 46 and the target pressure parameter is within the preset threshold.

[0056] The steps of the lubrication system control method are as follows: Figure 2 , Figure 2 It is a flow chart of a first embodiment of a lubrication system control method of 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: Get the real-time speed of the engine;

[0059] S2: determining a target pressure parameter corresponding to the first branch pipe 43 according to the real-time rotation speed;

[0060] S3: When the difference between the detection value of 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 the engine's own speed, so in the controller, each speed range of the engine is set with the corresponding preset pressure value. In the lubrication system control method, the speed needs to be obtained first, and then the pressure detection value of the engine oil channel at the speed is compared with the pressure target value of the engine oil channel to determine whether the pressure of the engine oil channel needs to be adjusted. When it is determined that adjustment is required, the pressure of the engine oil channel is adjusted.

[0062] The following adjustment methods are used to adjust the pressure of the engine oil channel:

[0063] The steps of the lubrication system control method are as follows: Figure 3 , Figure 3 It is a flow chart of a second embodiment of a lubrication system control method of the present invention.

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

[0065] S30 : adjusting the pressure in the first branch pipe 43 by adjusting the working 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 unchanged, the flow ratio of the three-way distributing valve 41 at the first liquid outlet and the second liquid outlet is adjusted so that the difference between the detection value of the first pressure sensor 46 and the target pressure parameter is within the preset threshold. When the flow ratio of the three-way distributing valve 41 at the first liquid outlet and the second liquid outlet remains unchanged, the power of the second oil pump 45 is adjusted so that the difference between the detection value of the first pressure sensor 46 and the target pressure parameter is within the preset threshold. Or the power of the second oil pump 45 and the flow ratio of the three-way distributing valve 41 at the first liquid outlet and the second liquid outlet are adjusted simultaneously so that the difference between the detection value of the first pressure sensor 46 and the target pressure parameter is within the preset threshold.

[0067] The specific adjustment method needs to be determined according to 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 control method is:

[0068] The steps of the lubrication system control method are as follows: Figure 4 , Figure 4 It is a flow chart of a third embodiment of a lubrication system control method of the present invention.

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

[0070] S300: Adjust the three-way distributing valve 41, and after the flow ratio between the first liquid outlet and the second liquid 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, it is necessary to adjust the valve opening size of the three-way distribution valve 41 at the first liquid outlet and the second liquid outlet, so that there is sufficient lubricating oil in the gearbox oil pipe to circulate and ensure the lubrication effect in the gearbox. After adjusting the valve opening size of the three-way distribution valve 41 at the first liquid outlet and the second liquid outlet, the pressure in the engine oil pipe does not meet the demand: when the difference between the detection value of the first pressure sensor 46 and the target pressure parameter exceeds the preset threshold, and the detection value of the first pressure sensor 46 is greater than the target pressure parameter, the power of the second oil pump 45 is reduced; when the difference between the detection value of the first pressure sensor 46 and the target pressure parameter exceeds the preset threshold, and the detection value of the first pressure sensor 46 is less than the target pressure parameter, the power of the second oil pump 45 is increased; when the difference between the detection value of the first pressure sensor 46 and the target pressure parameter does not exceed the preset threshold, there is no need to adjust the power of the second oil pump 45.

[0072] In another embodiment, the second oil pump 45 is configured as a mechanical pump, and the second oil pump 45 is not suitable for arbitrary adjustment, so the steps of adjusting the flow ratio of the three-way distribution valve 41 at the first liquid outlet and the second liquid outlet; and / or adjusting the power of the second oil pump 45; so that the pressure in the first branch pipe 43 reaches the preset pressure value include:

[0073] The flow ratio between the first liquid outlet and the second liquid outlet of the three-way distribution valve 41 is adjusted so that the pressure in the first branch pipe 43 reaches the preset pressure value.

[0074] In the process of adjusting the three-way distributing valve 41, the flow rates of the first liquid outlet and the second liquid outlet are inversely proportional, which not only satisfies the requirement that the three-way distributing valve 41 has a large adjustable range, but also ensures that there is sufficient lubricating oil in the gearbox oil pipe for lubrication. Therefore, the power of the mechanical pump must be large enough to ensure that the lubricating oil flow rate and pressure requirements of the engine and gearbox can be met at the same time.

[0075] The present invention also proposes a vehicle, the vehicle includes a lubrication system 100, the specific structure of the lubrication system 100 refers to the above embodiment, since the present lubrication system control method adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. The lubrication system 100 includes: an engine case 1, a gearbox case 2, a first pipeline assembly 3 and a second pipeline assembly 4; the engine case 1 has a first inner cavity 11; the gearbox case 2 has a second inner cavity 21, and the second inner cavity 21 is used to store lubricating oil; the first pipeline assembly 3 connects the first inner cavity 11 and the second inner cavity 21, so as to pump 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 channel and the gearbox oil channel.

[0076] This vehicle has an engine with smaller overall dimensions. An engine with smaller overall dimensions may lower the center of gravity of the vehicle, which will improve the vehicle's driving stability, especially when turning or driving at high speeds; a low center of gravity may make the vehicle's handling better and make driving easier, especially when avoiding obstacles in an emergency; a smaller engine design is more conducive to achieving a streamlined body, thereby reducing air resistance and improving fuel economy.

[0077] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A lubrication system, characterized in that: include: An engine case having a first inner cavity; The gearbox housing has a second inner cavity, wherein the second inner cavity is used for storing lubricating oil; a first pipeline assembly, connecting the first inner cavity and the second inner cavity, and used for pumping the lubricating oil in the first inner cavity to the second inner cavity; 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.

2. The lubrication system according to claim 1, characterized in that: The bottom of the engine case is provided with a first opening, the first opening is connected to the first inner cavity, and the gearbox case is provided with a second opening, the second opening is connected to the second inner cavity; The first pipeline assembly comprises: A connecting pipe connecting the first opening and the second opening; The first oil pump is arranged on the connecting pipe.

3. The lubrication system according to claim 2, characterized in that: The gearbox housing is provided with a third opening, and the third opening is connected to the second inner cavity; The second pipeline assembly comprises: A three-way distributing valve having a liquid inlet and a first liquid outlet and a second liquid outlet, wherein the liquid inlet is in communication with at least one of the first liquid outlet and the second liquid outlet; A main pipe, one end of which is connected to the third opening, and the other end of which is connected to the liquid inlet; a first branch pipe, one end of which is connected to the first liquid outlet and the other end of which is used to connect to the engine oil passage; a second branch pipe, one end of which is connected to the second liquid outlet and the other end of which is used to connect to the gearbox oil passage; The second oil pump is arranged on the main pipe.

4. The lubrication system according to claim 3, characterized in that: The second pipeline assembly further includes a first pressure sensor and a second pressure sensor, which are respectively arranged on the first branch pipe and the second branch pipe; The lubrication system further includes a controller, which is electrically connected to the first pressure sensor, the second pressure sensor, and the three-way distribution valve respectively.

5. In the lubrication system as described in claim 4, the first pipeline assembly also includes a third pressure sensor, which is arranged in the connecting pipe and is located between the first opening and the first oil pump and is located at a low position in the direction of gravity; the controller is electrically connected to the third pressure sensor and the first oil pump respectively.

6. The lubrication system according to claim 3, characterized in that: The third opening is located below the second opening in the up-down direction. The third opening is used to be arranged below the lubricating oil level, and the second opening is used to be arranged above the lubricating oil level.

7. A lubrication system control method, characterized in that: Based on the lubrication system according to claim 5, the lubrication system control method comprises: Get the real-time speed of the engine; Determine a target pressure parameter corresponding to the first branch pipe according to the real-time rotation speed; When the difference between the detection value of the first pressure sensor and the target pressure parameter exceeds a preset threshold, the pressure in the first branch pipe is adjusted accordingly.

8. The lubrication system control method according to claim 7, characterized in that: The step of correspondingly adjusting the pressure in the first branch pipe comprises: The pressure in the first branch pipe is adjusted by adjusting the working parameters of the three-way distribution valve and / or the second oil pump.

9. The lubrication system control method according to claim 8, characterized in that: The second oil pump is configured as an electronic pump; The step of adjusting the pressure in the first branch pipe by adjusting the working parameters of the three-way distribution valve and / or the second oil pump comprises: The three-way distributing valve is adjusted, and after the flow ratio between the first liquid outlet and the second liquid outlet reaches a preset ratio, the power of the second oil pump is adjusted so that the difference between the detection value of the first pressure sensor and the target pressure parameter is within the preset threshold.

10. A vehicle, characterized in that: Comprising a lubrication system as described in any one of claims 1 to claim 6.

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