Hybrid vehicle engine lubricating system, control method and hybrid vehicle

Abstract

The invention discloses a hybrid power automobile engine lubricating system, a control method and a hybrid power automobile, and relates to the technical field of hybrid power automobile lubrication.The hybrid power automobile engine lubricating system comprises a supercharger, an oil supply structure and an on-off structure.The supercharger supercharges engine inlet air through engine exhaust, and the on-off structure is connected with the oil supply structure; the oil supply structure comprises an oil supply part and two lubricating oil pipelines, the two lubricating oil pipelines are communicated with the oil supply part and the supercharger to form a lubricating oil loop, and lubricating oil flows to the supercharger from the oil supply part through one lubricating oil pipeline and then flows back to the oil supply part through the other lubricating oil pipeline. The on-off structure is arranged on one of the lubricating oil pipelines so as to communicate or block the corresponding lubricating oil pipeline. According to the arrangement, the electric drive gearbox lubricating oil system is adopted for supplying oil to the supercharger, the displacement of an engine oil pump is reduced, and then the oil consumption of an engine is reduced; and oil pressure is established in an oil way of the supercharger before the engine is started, so that the lubrication of a bearing of the supercharger is ensured.

Description

Technical Field

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

[0002] Turbochargers are commonly used in high-efficiency gasoline engines to increase the power and torque of small-displacement engines. Turbochargers use engine exhaust gas to drive the turbine at the turbine end of the supercharger to rotate. The turbine drives the compressor blades to rotate through the intermediate body shaft, thereby increasing the engine intake pressure, increasing the engine intake volume, and increasing the engine power and torque. The speed at which the intermediate body rotates driven by the supercharger turbine is very high (tens of thousands to hundreds of thousands of revolutions per minute), and a bearing is arranged between the intermediate body shaft and the supercharger housing. The engine oil pump is required to pump oil to lubricate the intermediate body bearing to ensure the reliability of the supercharger.

[0003] When the engine is started and runs at idle speed and low speed, the engine exhaust volume is insufficient and the exhaust pressure is low, resulting in insufficient supercharger boost pressure, which cannot increase the engine intake volume, but increases the engine exhaust resistance. Therefore, when the engine is running at low speed, the turbine is generally not required to intervene, and the exhaust bypass valve is opened to reduce the engine exhaust resistance. However, at this time, the exhaust gas discharged from the engine exhaust manifold will still partially pass through the turbine to drive the supercharger turbine to rotate. The turbine rotation speed can reach thousands to tens of thousands of revolutions. At this time, in order to lubricate the supercharger intermediate bearing, lubricating oil is still required to the supercharger bearing. Because the engine speed is low at this time and the oil pumping capacity is weak, the oil pump needs to have a large displacement to meet the oil pressure demand of the supercharger at low speed, resulting in excessive oil pump capacity at medium and high speeds of the engine, wasting engine power and increasing fuel consumption. In addition, when the engine is just started, due to the high rotation speed of the supercharger, there are also requirements for the time to establish the lubricating oil pressure. Generally, it is required that the oil pressure must be established within 4 seconds, otherwise the supercharger intermediate bearing will rotate at high speed without oil lubrication, which will cause bearing wear and reduce life. Summary of the invention

[0004] The main purpose of the present invention is to propose a hybrid vehicle engine lubrication system, a control method and a hybrid vehicle, aiming to solve the problem that the existing hybrid vehicle lubrication system causes the oil pump displacement to be too large in order to meet the lubrication demand of the supercharger at low engine speed, thereby causing the engine fuel consumption to increase, and when the engine is started at low temperature, it cannot meet the demand for rapid oil pressure establishment of the supercharger, which easily leads to bearing wear and reduced service life.

[0005] To achieve the above-mentioned purpose, the hybrid vehicle engine lubrication system proposed by the present invention is characterized by comprising:

[0006] A supercharger for pressurizing the engine intake air with the engine exhaust;

[0007] An oil supply structure, comprising an oil supply portion and two lubricating oil pipelines arranged at intervals, wherein the two lubricating oil pipelines are connected to the oil supply portion and the supercharger to form a lubricating oil circuit, wherein the lubricating oil flows from the oil supply portion through one of the lubricating oil pipelines to the supercharger, and then flows back to the oil supply portion through the other lubricating oil pipeline, wherein the oil supply portion comprises an oil pan of an electric drive gearbox; and

[0008] The on-off structure is arranged on one of the lubricating oil pipelines, and the on-off structure can connect or block the corresponding lubricating oil pipeline.

[0009] In one embodiment, the two lubricating oil pipelines include an oil supply pipeline and an oil return pipeline;

[0010] The on-off structure is arranged on the oil supply pipeline.

[0011] In one embodiment, the on-off structure includes an electrically controlled valve.

[0012] In one embodiment, the oil supply structure further includes an electrically driven transmission oil pump, and the electrically driven transmission oil pump is disposed in one of the lubricating oil pipelines to drive the lubricating oil to circulate in the lubricating oil circuit.

[0013] The present invention further proposes a control method for a hybrid vehicle engine lubrication system. Based on the above hybrid vehicle engine lubrication system, the control method for the hybrid vehicle engine lubrication system includes:

[0014] Obtain the power requirements of hybrid vehicles;

[0015] A lubrication method for the hybrid vehicle engine lubrication system is selected according to the power demand.

[0016] In one embodiment, the step of selecting a lubrication method for a hybrid vehicle engine lubrication system according to the power demand includes:

[0017] If the power demand is pure electric power output, the on-off structure is controlled to block the corresponding lubricating oil pipeline.

[0018] In one embodiment, the step of selecting a lubrication method for a hybrid vehicle engine lubrication system according to the power demand includes:

[0019] If the power demand is hybrid power output, controlling the on-off structure to connect the corresponding lubricating oil pipeline;

[0020] Start the engine.

[0021] In one embodiment, after the step of starting the engine, the method further comprises:

[0022] obtaining the power requirement again;

[0023] If the power demand is switched from the hybrid power output to the pure electric power output, shutting down the engine;

[0024] Obtaining the downtime of the engine;

[0025] If the downtime is higher than a preset time threshold, the on-off structure is controlled to block the corresponding lubricating oil pipeline.

[0026] In one embodiment, before the step of obtaining the power requirement of the hybrid vehicle, the method further includes:

[0027] Starting the hybrid vehicle and obtaining the oil temperature of the electric drive transmission of the hybrid vehicle;

[0028] If the oil temperature of the electric drive gearbox is lower than a preset temperature threshold, the on-off structure is controlled to connect the corresponding lubricating oil pipeline;

[0029] Start the engine.

[0030] The present invention further provides a hybrid vehicle, comprising:

[0031] A hybrid vehicle engine lubrication system, comprising the hybrid vehicle engine lubrication system described above; and

[0032] A control device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the control method of the hybrid vehicle engine lubrication system.

[0033] In the technical solution of the present invention, when the engine is not running, the supercharger is also not working. At this time, it is not necessary to lubricate the supercharger. Therefore, the on-off structure blocks the corresponding lubricating oil pipeline, and the lubricating oil in the oil supply part is specially used to lubricate the electric drive gearbox; when the hybrid vehicle needs to start the engine to drive the generator to generate electricity, or in working conditions such as sudden acceleration, the on-off structure is connected to the corresponding lubricating oil pipeline before starting the engine, so that the electric drive gearbox lubricating oil in the oil supply part can be filled into the oil circuit of the supercharger before the engine is started, and oil pressure is established in the oil circuit of the supercharger to ensure good lubrication of the bearings of the supercharger. 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 hybrid vehicle engine lubrication system provided by the present invention;

[0036] Figure 2 A schematic flow chart of a first embodiment of a control method for a hybrid vehicle engine lubrication system provided by the present invention;

[0037] Figure 3 A schematic flow chart of a second embodiment of a control method for a hybrid vehicle engine lubrication system provided by the present invention;

[0038] Figure 4 A schematic flow chart of a third embodiment of a control method for a hybrid vehicle engine lubrication system provided by the present invention;

[0039] Figure 5 A schematic flow chart of a fourth embodiment of a control method for a hybrid vehicle engine lubrication system provided by the present invention;

[0040] Figure 6 A schematic flow chart of a fifth embodiment of a control method for a hybrid vehicle engine lubrication system provided by the present invention;

[0041] Figure 7 A schematic diagram of the device structure of the hardware operating environment involved in the control method of the hybrid vehicle engine lubrication system provided by the present invention.

[0042] Description of Figure Numbers:

[0043] 100. Hybrid vehicle engine lubrication system; 1. Supercharger; 2. Oil supply structure; 21. Oil supply unit; 211. Electric drive transmission oil pan; 22. Lubricating oil pipeline; 221. Oil supply pipeline; 222. Oil return pipeline; 23. Electric drive transmission oil pump; 3. On-off structure; 31. Electric control valve; 41. Air filter; 42. Air flow meter; 43. Pressure relief valve; 44. Intake intercooler; 45. Throttle; 46. Cylinder; 47. Intake pipeline; 48. Exhaust pipeline; 49. Waste gas bypass valve; 51. Oxygen sensor; 52. Three-way catalytic converter; 53. Impeller; 54. Turbine.

[0044] 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

[0045] 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.

[0046] 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.

[0047] 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.

[0048] The present invention proposes a hybrid vehicle engine lubrication system, which aims to solve the problem that the existing hybrid vehicle lubrication system causes the oil pump displacement to be too large to meet the lubrication demand of the supercharger at low engine speed, thereby increasing the engine oil consumption, and cannot meet the demand of the supercharger to quickly establish oil pressure when the engine is started at low temperature, which easily leads to bearing wear and shortened service life.

[0049] See also Figure 1In one embodiment of the present invention, the hybrid vehicle engine lubrication system 100 includes a supercharger 1, an oil supply structure 2 and a switch structure 3. The supercharger 1 is used to supercharge the engine intake air through the engine exhaust. The oil supply structure 2 includes an oil supply part 21 and two lubricating oil pipelines 22 arranged at intervals. The two lubricating oil pipelines 22 are connected to the oil supply part 21 and the supercharger 1 to form a lubricating oil circuit. The lubricating oil flows from the oil supply part 21 to the supercharger 1 through one of the lubricating oil pipelines 22, and then flows back to the oil supply part 21 through the other lubricating oil pipeline 22. The oil supply part 21 includes an electric drive gearbox oil pan 211. The switch structure 3 is arranged on one of the lubricating oil pipelines 22. The switch structure 3 can connect or block the corresponding lubricating oil pipeline 22.

[0050] In the technical solution of the present invention, when the engine is not running, the supercharger 1 is also not working. At this time, it is not necessary to lubricate the supercharger 1. Therefore, the on-off structure 3 blocks the corresponding lubricating oil pipeline 22, and the lubricating oil in the oil supply part 21 is specially used to lubricate the electric drive gearbox; when the hybrid vehicle needs to start the engine to drive the generator to generate electricity, or in the case of rapid acceleration and other working conditions, the on-off structure 3 is connected to the corresponding lubricating oil pipeline 22 before starting the engine, so that the electric drive gearbox lubricating oil in the oil supply part 21 can be filled into the oil circuit of the supercharger 1 before the engine is started, and oil pressure is established in the oil circuit of the supercharger 1 to ensure good lubrication of the bearings of the supercharger 1;

[0051] It is understandable that when the on-off structure 3 is connected to the corresponding lubricating oil pipeline 22, part of the lubricating oil in the electric drive gearbox oil pan 211 is used to lubricate the electric drive gearbox itself, and the other part is used to lubricate the supercharger 1 bearing, and since the electric drive gearbox is always in working state, the lubrication system in the electric drive gearbox will also be always in working state. At this time, the engine part will only start the engine when the engine drives the generator to generate electricity and the engine directly drives the wheels. Therefore, before the engine starts, the temperature of the lubricating oil in the electric drive gearbox oil pan 211 is high, the viscosity of the lubricating oil is low, and the fluidity is good. The lubricating oil in the electric drive gearbox oil pan 211 can be quickly introduced into the supercharger 1 bearing position through the lubricating oil pipeline 22 to achieve the purpose of quickly building up oil pressure.

[0052] It should also be noted that, in the present invention, the two lubricating oil pipelines 22 include an oil supply pipeline 221 and an oil return pipeline 222. The oil supply pipeline 221 is used to introduce the lubricating oil in the electric drive transmission oil pan 211 into the supercharger 1, and the oil return pipeline 222 is used to return the lubricating oil at the supercharger 1 to the electric drive transmission oil pan 211, thereby completing the circulation of the lubricating oil.

[0053] Furthermore, the present invention does not limit the specific setting position of the on-off structure 3. In one embodiment of the present invention, the on-off structure 3 is arranged on the oil supply pipeline 221, and the on-off structure 3 can connect or block the oil supply pipeline 221; and in another embodiment of the present invention, the on-off structure 3 is arranged on the oil return pipeline 222, and the on-off structure 3 can connect or block the oil return pipeline 222.

[0054] In summary, the specific location of the on-off structure 3 can be selected according to the requirements, and the present invention does not impose any limitation on this.

[0055] Specifically, in this embodiment, the on-off structure 3 is provided in the oil supply pipeline 221 .

[0056] Furthermore, the present invention does not limit the specific structural form of the on-off structure 3. In one embodiment of the present invention, the on-off structure 3 can be configured as a mechanical valve. In this way, when it is necessary to switch the connection or blockage of the oil supply pipeline 221, the mechanical valve works to connect or block the oil supply pipeline 221.

[0057] In another embodiment of the present invention, the on-off structure 3 can also be configured as an electrically controlled valve 31. With this configuration, when it is necessary to switch the connection or blockage of the oil supply pipeline 221, the electrically controlled valve 31 can have higher precision, thereby responding quickly and completing the on-off switching of the oil supply pipeline 221 to ensure the effectiveness of the automobile engine lubrication system.

[0058] In this embodiment, the on-off structure 3 is configured as the electric control valve 31 .

[0059] Of course, when the on-off structure 3 is set as the electric control valve 31, the present invention also does not limit the specific valve form of the electric control valve 31. In one embodiment of the present invention, the electric control valve 31 can be set as a ball valve; in another embodiment of the present invention, the electric control valve 31 can also be set as a butterfly valve.

[0060] In other embodiments of the present invention, the electrically controlled valve 31 may also be configured as a stop valve, a gate valve, or other valve forms. In actual configuration, the valve may be selected according to the needs, and the present invention does not impose any limitation on this.

[0061] In addition, when the on-off structure 3 is connected to the corresponding lubricating oil pipeline 22, in order to ensure that the lubricating oil in the electric drive gearbox oil pan 211 can flow to the supercharger 1, it is also necessary to provide a driving force for the lubricating oil in the lubricating oil circuit, so as to realize the circulation of the lubricating oil. In one embodiment of the present invention, the oil supply structure 2 also includes an electric drive gearbox oil pump 23, which is arranged in one of the lubricating oil pipelines 22 to drive the lubricating oil to circulate in the lubricating oil circuit. In this way, when the on-off structure 3 is connected to the corresponding lubricating oil pipeline 22, the electric drive gearbox oil pump 23 can provide a driving force for the lubricating oil in the lubricating oil circuit, so as to realize the circulation of the lubricating oil, thereby driving the lubricating oil from the electric drive gearbox oil pan 211 to the supercharger 1, so as to provide lubrication for the supercharger 1 through the electric drive gearbox lubrication system.

[0062] It can be understood that the present invention does not limit the specific setting position of the electric drive transmission oil pump 23. In one embodiment of the present invention, the electric drive transmission oil pump 23 can be set on the oil supply pipe 221. In this way, the electric drive transmission oil pump 23 is used to drive the lubricating oil in the electric drive transmission oil pan 211 to the supercharger 1, and further pressure-drive the lubricating oil in the supercharger 1, so that the lubricating oil in the supercharger 1 flows back from the return oil pipe 222 to the electric drive transmission oil pan 211, so as to realize the circulation of the lubricating oil.

[0063] In another embodiment of the present invention, the electrically driven transmission oil pump 23 may also be arranged on the oil return pipe 222. With this arrangement, the electrically driven transmission oil pump 23 is used to pump the lubricating oil at the supercharger 1 back into the electrically driven transmission oil pan 211. At this time, negative pressure is generated at the supercharger 1, which can further suck the lubricating oil in the transmission oil pan from the oil supply pipe 221 to the supercharger 1 to achieve the circulation of the lubricating oil.

[0064] In summary, the specific location of the electrically driven transmission oil pump 23 can be selected according to the requirements, and the present invention does not impose any limitation on this.

[0065] Specifically, in this embodiment, the electrically driven transmission oil pump 23 is disposed in the oil supply pipeline 221 .

[0066] The present invention also provides a control method for a hybrid vehicle engine lubrication system 100. Based on the above hybrid vehicle engine lubrication system 100, please refer to Figure 2 In the first embodiment of the present invention, the control method of the hybrid vehicle engine lubrication system 100 includes:

[0067] S100, obtain the power demand of the hybrid vehicle;

[0068] It is understandable that the hybrid vehicle has an engine output unit and a motor output unit, and therefore the hybrid vehicle has multiple power output modes. It is necessary to first determine the specific power output mode requirements of the hybrid vehicle.

[0069] S200: selecting a lubrication method for the hybrid vehicle engine lubrication system 100 according to the power demand.

[0070] It is understandable that different power output modes of the hybrid vehicle have different requirements for lubrication. For example, when the hybrid vehicle is in pure electric power output, only the motor needs to be lubricated, and the engine does not need to be lubricated; when the hybrid vehicle is in hybrid power output, both the engine and the motor need to be lubricated; when the hybrid vehicle is in pure oil power output, only the engine needs to be lubricated, and the motor does not need to be lubricated.

[0071] In the technical solution of the present invention, since the hybrid vehicle has a plurality of different power output modes, before determining the specific lubrication method of the hybrid vehicle, it is first necessary to obtain the power requirement of the hybrid vehicle, and then select the lubrication method of the hybrid vehicle engine lubrication system 100 according to the power requirement, so as to lubricate the various power output modes of the hybrid vehicle, so as to reduce the energy consumption generated by the lubrication work and increase the service life of multiple components.

[0072] Understandably, see Figure 3 When the hybrid vehicle is powered by pure electricity, in the second embodiment of the present invention, step S200 includes:

[0073] S210 , if the power demand is pure electric power output, control the on-off structure 3 to block the corresponding lubricating oil pipeline 22 .

[0074] In the technical solution of this embodiment, when the power demand is pure electric power output, it means that only the motor is ready to work, that is, the engine is not working. Therefore, there is no need to provide lubrication for the supercharger 1. At this time, the on-off structure 3 is controlled to block the corresponding lubricating oil pipeline 22 to prevent the lubricating oil in the electric drive gearbox oil pan 211 from flowing to the supercharger 1. The lubricating oil in the electric drive gearbox oil pan 211 only provides lubrication for the electric drive gearbox.

[0075] For further information, see Figure 4 When the hybrid vehicle needs to switch to hybrid power output, in the third embodiment of the present invention, step S200 includes:

[0076] S220, if the power demand is hybrid power output, control the on-off structure 3 to connect the corresponding lubricating oil pipeline 22;

[0077] It can be understood that when the power demand is hybrid power output, it means that the engine and the motor are ready to work at this time. Therefore, at this time, it is necessary to provide lubrication for the supercharger 1, control the on-off structure 3 to connect the corresponding lubricating oil pipeline 22, and the lubricating oil in the electric drive gearbox oil pan 211 can flow to the supercharger 1 through one of the lubricating oil pipelines 22, and establish oil pressure in the oil circuit of the supercharger 1 in advance.

[0078] S230: Start the engine.

[0079] After the oil pressure at the supercharger 1 is established in advance, the engine is started. At this time, since the oil pressure at the supercharger 1 has been established in advance, when the supercharger 1 starts to run, the bearings of the supercharger 1 will be pressure-lubricated to avoid bearing wear and extend the life of the supercharger 1.

[0080] In the technical solution of this embodiment, when the power demand is hybrid power output, it means that the motor and the engine are ready to work at this time, therefore, lubrication is required for the supercharger 1. At this time, the channel structure is controlled to connect to the corresponding lubricating oil pipeline 22, so that the electric drive gearbox lubricating oil in the oil supply part 21 can be filled into the oil circuit of the supercharger 1 before the engine is started, and oil pressure is established in the oil circuit of the supercharger 1, and then the engine is started, to ensure that the supercharger 1 can be directly lubricated at the time of starting, so as to avoid bearing wear and extend the life of the supercharger 1.

[0081] See also Figure 5 In the fourth embodiment of the present invention, after step S230, the method further includes:

[0082] S240, obtaining the power demand again;

[0083] It is understandable that after the hybrid vehicle enters the hybrid power output mode, the hybrid vehicle will not remain in this mode forever. Therefore, it is necessary to obtain the power demand again so as to switch the corresponding lubrication method when the hybrid vehicle switches its power output mode next time.

[0084] S250: if the power demand is switched from the hybrid power output to the pure electric power output, shut down the engine;

[0085] It is understandable that when the power demand is pure electric power output, it means that only the motor is ready to work, that is, the engine is not working, so the engine needs to be turned off at this time.

[0086] S260, obtaining the downtime of the engine;

[0087] It should be noted that after the engine is turned off, the supercharger 1 does not stop rotating immediately, but still maintains a high-speed operating state due to inertia. At this time, the supercharger 1 still needs lubricating oil to be supplied.

[0088] Furthermore, because the engine oil pump cannot continue to pump oil when the engine is stopped, in order to avoid wear of the supercharger 1 during the time when the engine is in a high-speed operation state after the engine is stopped, the on-off structure 3 should continue to connect the corresponding lubricating oil channel so that the lubricating oil in the electric drive gearbox can still supply lubricating oil to the supercharger 1, so as to ensure good lubrication of the bearings of the supercharger 1 during the engine shutdown process.

[0089] S270 , if the downtime is higher than a preset time threshold, control the on-off structure 3 to block the corresponding lubricating oil pipeline 22 .

[0090] It can be understood that when the downtime is higher than the preset time threshold, it indicates that the supercharger 1 has left the high-speed operation state. At this time, it is no longer necessary to supply lubricating oil to the supercharger 1. Therefore, the on-off structure 3 is controlled to block the corresponding lubricating oil pipeline 22 to prevent the lubricating oil in the electric drive gearbox oil pan 211 from flowing to the supercharger 1. The lubricating oil in the electric drive gearbox oil pan 211 only provides lubrication for the electric drive gearbox, saving the power of the electric drive gearbox oil pump 23.

[0091] In the technical solution of this embodiment, after the engine has been running for a certain period of time, if the power demand of the hybrid vehicle needs to be switched from the hybrid power output to the pure electric power output, at this time, the engine is no longer needed to provide power, so the engine is turned off to stop the engine. However, after the engine is stopped, the supercharger 1 still maintains a high speed operation due to inertia. At this time, since the engine is stopped, the engine oil pump cannot continue to pump oil. Therefore, the lubricating oil in the oil pan 211 of the electric drive gearbox continues to supply oil to the supercharger 1 to ensure that the supercharger 1 is running at a high speed. The lubrication performance under high-speed operation is improved to ensure the life of the bearing of the supercharger 1. After the downtime is higher than the preset time threshold, it indicates that the supercharger 1 has been out of high-speed operation. At this time, it is no longer necessary to supply lubricating oil to the supercharger 1. Therefore, the on-off structure 3 is controlled to block the corresponding lubricating oil pipeline 22 to prevent the lubricating oil in the electric drive gearbox oil pan 211 from flowing to the supercharger 1. The lubricating oil in the electric drive gearbox oil pan 211 only provides lubrication for the electric drive gearbox, saving the power of the electric drive gearbox oil pump 23.

[0092] See also Figure 6 In the fifth embodiment of the present invention, before step S100, the following steps are further included:

[0093] S001, starting the hybrid vehicle and obtaining the oil temperature of the electric drive transmission of the hybrid vehicle;

[0094] It is understandable that the viscosity of the lubricating oil is closely related to the temperature. The lower the temperature, the greater the viscosity of the lubricating oil. Therefore, when the hybrid vehicle is started, it is necessary to obtain the current oil temperature of the electric drive transmission of the hybrid vehicle to determine the viscosity of the lubricating oil.

[0095] S002, if the oil temperature of the electric drive gearbox is lower than the preset temperature threshold, control the on-off structure 3 to connect the corresponding lubricating oil pipeline 22;

[0096] It should be noted that when the oil temperature of the electric drive gearbox is lower than the preset temperature threshold, it indicates that the viscosity of the lubricating oil is too high, which has a great impact on the transmission efficiency of the electric drive gearbox, resulting in high energy consumption of the hybrid vehicle. Therefore, the on-off structure 3 is controlled to connect the corresponding lubricating oil pipeline 22, so that the lubricating oil in the oil pan 211 of the electric drive gearbox can flow to the supercharger 1.

[0097] S003. Start the engine.

[0098] With such a configuration, when the engine is started and high-temperature gas is discharged, since the supercharger 1 supercharges the engine intake air through the high-temperature exhaust gas of the engine, the temperature rise rate of the intermediate body of the supercharger 1 is very fast. At this time, the supercharger 1 can heat the lubricating oil at the supercharger 1, so that the temperature of the lubricating oil at the supercharger 1 rises rapidly, thereby improving the transmission efficiency of the electric drive gearbox and reducing the energy consumption of the hybrid vehicle.

[0099] In the technical solution of this embodiment, when the hybrid vehicle is cold started, since the temperature is lower than the preset temperature threshold, the viscosity of the lubricating oil is too high, thereby affecting the transmission power of the electric drive gearbox. Therefore, at this time, it is necessary to quickly increase the temperature of the lubricating oil, and the on-off structure 3 is connected to the corresponding lubricating oil pipeline 22, so that the lubricating oil in the oil pan 211 of the electric drive gearbox can flow to the supercharger 1, and the engine is started. The engine can discharge high-temperature gas during operation to heat the lubricating oil at the supercharger 1, so that the temperature of the lubricating oil at the supercharger 1 rises rapidly, thereby improving the transmission efficiency of the electric drive gearbox and reducing the energy consumption of the hybrid vehicle.

[0100] It should also be noted that when the lubricating oil temperature is too high, it will also affect the transmission power of the electric drive gearbox. Therefore, in the process of the supercharger 1 heating the lubricating oil, it is necessary to always obtain the oil temperature of the lubricating oil. When the oil temperature of the lubricating oil is higher than the preset oil temperature threshold, it means that there is no need to continue heating the lubricating oil at this time. The engine is shut down, and the on-off structure 3 is controlled to block the corresponding lubricating oil pipeline 22 to save energy consumption of the electric drive gearbox oil pump 23.

[0101] The present invention further proposes a hybrid vehicle, which includes a hybrid vehicle engine lubrication system 100 and a control device. The specific structure of the hybrid vehicle engine lubrication system 100 refers to the above embodiment. Since the hybrid vehicle 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 one by one.

[0102] The control device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. The computer program is configured to implement the steps of the control method of the hybrid vehicle engine lubrication system 100 as described above.

[0103] It should be noted that the present invention does not limit the specific carrier of the control device. In one embodiment of the present invention, the carrier of the control device can be set to the above-mentioned hybrid vehicle engine lubrication system 100, that is, the hybrid vehicle engine lubrication system 100 also includes the control device; and in other embodiments of the present invention, the carrier of the control device can also be set to other structures, and the present invention does not limit this.

[0104] Reference below Figure 7 , which shows a schematic diagram of the structure of a control device suitable for implementing an embodiment of the present invention. The control device in the embodiment of the present invention may include, but is not limited to, mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 7 The control device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0105] like Figure 7As shown, the control device may include a processing device 1001 (e.g., a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the control device are also stored. The processing device 1001, ROM1002, and RAM1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 may allow the control device to communicate with other devices wirelessly or by wire to exchange data. Figure 7 A control device with various systems is shown in FIG. 1 , but it should be understood that it is not required to implement or have all the systems shown. More or fewer systems may be implemented or have instead.

[0106] In particular, according to the embodiments disclosed in the present invention, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present invention include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program contains program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through a communication device, or installed from the storage device 1003, or installed from the ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present invention are executed.

[0107] The control device provided by the present invention adopts the control method of the hybrid vehicle engine lubrication system 100 in the above embodiment, which can solve the problem that the existing hybrid vehicle lubrication system is prone to waste engine power during lubrication of the supercharger, resulting in an increase in oil pressure, and cannot quickly meet the lubrication needs of the supercharger when the engine is started, which easily leads to bearing wear and reduced life. Compared with the prior art, the beneficial effects of the control device provided by the present invention are the same as the beneficial effects of the control method of the hybrid vehicle engine lubrication system 100 provided in the above embodiment, and other technical features in the control device are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0108] It should be understood that the various parts disclosed in the present invention can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0109] 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 hybrid vehicle engine lubrication system, characterized in that: include: A supercharger for pressurizing the engine intake air with the engine exhaust; An oil supply structure, comprising an oil supply portion and two lubricating oil pipelines arranged at intervals, wherein the two lubricating oil pipelines are connected to the oil supply portion and the supercharger to form a lubricating oil circuit, wherein the lubricating oil flows from the oil supply portion through one of the lubricating oil pipelines to the supercharger, and then flows back to the oil supply portion through the other lubricating oil pipeline, wherein the oil supply portion comprises an oil pan of an electric drive gearbox; and The on-off structure is arranged on one of the lubricating oil pipelines, and the on-off structure can connect or block the corresponding lubricating oil pipeline.

2. The hybrid vehicle engine lubrication system according to claim 1, characterized in that: The two lubricating oil pipelines include an oil supply pipeline and an oil return pipeline; The on-off structure is arranged on the oil supply pipeline.

3. The hybrid vehicle engine lubrication system according to claim 1, characterized in that: The on-off structure includes an electrically controlled valve.

4. The hybrid vehicle engine lubrication system according to claim 1, characterized in that: The oil supply structure also includes an electrically driven gearbox oil pump, which is arranged in one of the lubricating oil pipelines to drive the lubricating oil to circulate in the lubricating oil circuit.

5. A control method for a hybrid vehicle engine lubrication system, characterized in that: Based on the hybrid vehicle engine lubrication system according to any one of claims 1 to 4, the control method of the hybrid vehicle engine lubrication system comprises: Obtain the power requirements of hybrid vehicles; A lubrication method for the hybrid vehicle engine lubrication system is selected according to the power demand.

6. The control method of the hybrid vehicle engine lubrication system according to claim 5, characterized in that: The step of selecting a lubrication method for the hybrid vehicle engine lubrication system according to the power demand comprises: If the power demand is pure electric power output, the on-off structure is controlled to block the corresponding lubricating oil pipeline.

7. The control method of the hybrid vehicle engine lubrication system according to claim 5, characterized in that: The step of selecting a lubrication method for the hybrid vehicle engine lubrication system according to the power demand comprises: If the power demand is hybrid power output, controlling the on-off structure to connect the corresponding lubricating oil pipeline; Start the engine.

8. The control method of the hybrid vehicle engine lubrication system according to claim 7, characterized in that: After the step of starting the engine, the method further comprises: obtaining the power requirement again; If the power demand is switched from the hybrid power output to the pure electric power output, shutting down the engine; Obtaining the downtime of the engine; If the downtime is higher than a preset time threshold, the on-off structure is controlled to block the corresponding lubricating oil pipeline.

9. The control method of the hybrid vehicle engine lubrication system according to claim 5, characterized in that: Before the step of obtaining the power requirement of the hybrid vehicle, the method further includes: Starting the hybrid vehicle and obtaining the oil temperature of the electric drive transmission of the hybrid vehicle; If the oil temperature of the electric drive gearbox is lower than a preset temperature threshold, the on-off structure is controlled to connect the corresponding lubricating oil pipeline; Start the engine.

10. A hybrid vehicle, characterized in that: include: A hybrid vehicle engine lubrication system, comprising the hybrid vehicle engine lubrication system according to any one of claims 1 to 4; as well as, A control device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of a control method for a hybrid vehicle engine lubrication system as claimed in any one of claims 5 to 9.

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