Hybrid vehicle engine lubrication system and control method, and hybrid vehicle

Abstract

The application discloses a hybrid vehicle engine lubricating system, a control method and a hybrid vehicle, and relates to the technical field of hybrid vehicle lubrication, wherein the hybrid vehicle engine lubricating system comprises a supercharger, an oil supply structure and an on-off structure; the supercharger pressurizes the engine intake air through engine exhaust; the oil supply structure comprises an oil supply part and two lubricating oil pipelines; the two lubricating oil pipelines are both connected with the oil supply part and the supercharger, forming a lubricating oil circuit; the lubricating oil flows from the oil supply part to the supercharger through one lubricating oil pipeline, and then returns to the oil supply part through another lubricating oil pipeline; the oil supply part comprises an electrically-driven gearbox oil pan; the on-off structure is arranged on one of the lubricating oil pipelines to connect or block the corresponding lubricating oil pipeline. In this way, the supercharger is supplied with oil by adopting the electrically-driven gearbox lubricating oil system, the displacement of the engine oil pump is reduced, and the fuel consumption of the engine is reduced; and the oil pressure of the supercharger oil circuit is established before the engine starts, so that the lubrication of the bearings of the supercharger is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hybrid vehicle lubrication, and particularly relates to a hybrid vehicle engine lubrication system, a control method and a hybrid vehicle. BACKGROUND

[0002] A turbocharger is generally used on a high-efficiency gasoline engine to increase the power and torque of a small displacement engine. The turbocharger uses engine exhaust gas to drive the turbocharger turbine end to rotate, and the turbine drives the compressor end blades to rotate through an intermediate shaft, thereby increasing the engine intake pressure, increasing the engine intake volume, and improving the engine power and torque. The rotation speed of the intermediate body driven by the turbocharger turbine is very high (several ten thousand to several hundred thousand revolutions per minute), and a bearing is arranged between the intermediate shaft and the turbocharger shell. The engine oil pump needs to pump oil to lubricate the intermediate bearing to ensure the reliability of the turbocharger.

[0003] When the engine starts and runs at idle speed and low speed, the engine exhaust volume is insufficient, and the exhaust pressure is small, which leads to insufficient turbocharging pressure and cannot increase the engine intake volume, but increases the engine exhaust resistance. Therefore, when the engine runs 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, the exhaust gas discharged from the engine exhaust manifold still partially passes through the turbine to drive the turbocharger turbine to rotate, and the rotation speed of the turbine can reach several thousand to several ten thousand revolutions. At this time, in order to lubricate the intermediate bearing of the turbocharger, lubricating oil needs to be provided to the turbocharger bearing. Since the engine speed is low at this time, the oil pumping capacity is weak, and the oil pump needs to have a large displacement to meet the oil pressure demand of the turbocharger at low speed, which leads to excessive capacity of the engine oil pump at medium and high speeds of the engine, waste of engine power, and increase of oil consumption. In addition, when the engine is started, the rotation speed of the turbocharger is relatively high, and the time required for establishing the lubricating oil pressure is also required. Generally, the oil pressure must be established within 4 seconds, otherwise the intermediate bearing of the turbocharger will be worn and the service life will be reduced under the condition of high-speed rotation without oil lubrication. SUMMARY

[0004] The main purpose of the present application is to provide a hybrid vehicle engine lubrication system, a control method and a hybrid vehicle, which aims to solve the problem that the existing hybrid vehicle lubrication system needs to have a large displacement of the oil pump to meet the lubrication demand of the turbocharger at low speed of the engine, thereby leading to an increase in the oil consumption of the engine, and the turbocharger cannot meet the demand for rapid oil pressure establishment at low temperature start of the engine, which easily leads to bearing wear and reduces the service life.

[0005] To achieve the above-mentioned purpose, the hybrid vehicle engine lubrication system provided by the present application has the characteristics that it comprises:

[0006] A turbocharger is used to supercharge the engine intake through the engine exhaust.

[0007] The oil supply structure comprises an oil supply part and two lubricating oil pipelines arranged at intervals, both of which are communicated with the oil supply part and the supercharger to form a lubricating oil loop, the lubricating oil flows from the oil supply part to the supercharger through one of the lubricating oil pipelines and then returns to the oil supply part through the other lubricating oil pipeline, and the oil supply part comprises an electrically driven gearbox oil pan; and

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

[0009] In an embodiment, the two lubricating oil pipelines comprise an oil supply pipeline and an oil return pipeline.

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

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

[0012] In an embodiment, the oil supply structure further comprises an electrically driven gearbox oil pump arranged on one of the lubricating oil pipelines to drive the lubricating oil to circulate in the lubricating oil loop.

[0013] The application further provides a control method of a hybrid vehicle engine lubricating system, based on the above hybrid vehicle engine lubricating system, the control method of the hybrid vehicle engine lubricating system comprising:

[0014] Obtaining the power demand of the hybrid vehicle;

[0015] Selecting a lubricating method of the hybrid vehicle engine lubricating system according to the power demand.

[0016] In an embodiment, the step of selecting a lubricating method of the hybrid vehicle engine lubricating system according to the power demand comprises:

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

[0018] In an embodiment, the step of selecting a lubricating method of the hybrid vehicle engine lubricating system according to the power demand comprises:

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

[0020] Starting the engine.

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

[0022] obtaining the power demand again;

[0023] if the power demand is switched from the hybrid power output to the pure electric power output, closing the engine;

[0024] obtaining the engine downtime;

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

[0026] In an embodiment, before the step of obtaining the power demand of the hybrid vehicle, the method further comprises:

[0027] starting the hybrid vehicle and obtaining the electric drive gearbox oil temperature of the hybrid vehicle;

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

[0029] starting the engine.

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

[0031] a hybrid vehicle engine lubricating system comprising the hybrid vehicle engine lubricating system described above; and

[0032] a control device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the control method of the hybrid vehicle engine lubricating system described above.

[0033] In the technical solution of the application, when the engine is not running, the supercharger is also not working, at this time, the on-off structure blocks the corresponding lubricating oil pipeline, and the lubricating oil in the oil supply part lubricates the electric drive gearbox only; when the hybrid vehicle needs to start the engine to drive the generator to generate electricity, or in the case of sudden acceleration, the on-off structure connects 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 the oil pressure is established in the oil circuit of the supercharger, so as to ensure good lubrication of the bearings of the supercharger. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to make the technical solutions in the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor based on the drawings shown.

[0035] Figure 1 The structural schematic diagram of an embodiment of the hybrid vehicle engine lubricating system provided by the present application is shown in the figure.

[0036] Figure 2 The flowchart of the first embodiment of the control method of the hybrid vehicle engine lubricating system provided by the present application is shown in the figure.

[0037] Figure 3 The flowchart of the second embodiment of the control method of the hybrid vehicle engine lubricating system provided by the present application is shown in the figure.

[0038] Figure 4 The flowchart of the third embodiment of the control method of the hybrid vehicle engine lubricating system provided by the present application is shown in the figure.

[0039] Figure 5 The flowchart of the fourth embodiment of the control method of the hybrid vehicle engine lubricating system provided by the present application is shown in the figure.

[0040] Figure 6 The flowchart of the fifth embodiment of the control method of the hybrid vehicle engine lubricating system provided by the present application is shown in the figure.

[0041] Figure 7 The device structure schematic diagram of the hardware running environment involved in the control method of the hybrid vehicle engine lubricating system provided by the present application is shown in the figure.

[0042] Explanation of the reference numerals:

[0043] 100, hybrid vehicle engine lubricating system; 1, supercharger; 2, oil supply structure; 21, oil supply part; 211, electric drive gearbox oil sump; 22, lubricating oil pipeline; 221, oil supply pipeline; 222, oil return pipeline; 23, electric drive gearbox 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 valve; 46, cylinder; 47, intake pipeline; 48, exhaust pipeline; 49, exhaust gas bypass valve; 51, oxygen sensor; 52, three-way catalyst; 53, impeller; 54, turbine.

[0044] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0046] It should be noted that if the embodiments of the present application 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 condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0047] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on that a person of ordinary skill in the art can realize it, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope of the present application.

[0048] The present application provides a hybrid vehicle engine lubrication system. Aims to solve the problem that the existing hybrid vehicle lubrication system is too large to meet the lubrication demand of the supercharger at low engine speed, resulting in excessive engine oil consumption, and unable to meet the demand of rapid oil pressure establishment of the supercharger at low temperature engine start, easily leading to bearing wear and reduced service life.

[0049] Please refer to Figure 1In an embodiment of the present application, the hybrid vehicle engine lubrication system 100 comprises a supercharger 1, an oil supply structure 2 and an on-off structure 3, the supercharger 1 is used to supercharge the engine intake air through the engine exhaust, the oil supply structure 2 comprises an oil supply part 21 and two lubricating oil pipes 22 arranged at intervals, both of the lubricating oil pipes 22 are communicated with 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 pipes 22 and then returns to the oil supply part 21 through the other lubricating oil pipe 22, the oil supply part 21 comprises an electric drive gearbox oil pan 211, and the on-off structure 3 is arranged on one of the lubricating oil pipes 22, and the on-off structure 3 can communicate or block the corresponding lubricating oil pipe 22.

[0050] In the technical scheme of the present application, when the engine is not running, the supercharger 1 also does not work, at this time, the supercharger 1 does not need to be lubricated, therefore, the on-off structure 3 blocks the corresponding lubricating oil pipe 22, and the lubricating oil in the oil supply part 21 is 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 condition of sudden acceleration, the on-off structure 3 communicates the corresponding lubricating oil pipe 22 before starting the engine, so that the electric drive gearbox lubricating oil in the oil supply part 21 can fill the oil circuit of the supercharger 1 before the engine starts, and the oil pressure of the oil circuit of the supercharger 1 is established, so as to ensure the good lubrication of the bearings of the supercharger 1.

[0051] It can be understood that when the on-off structure 3 communicates the corresponding lubricating oil pipe 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 bearings of the supercharger 1, and since the electric drive gearbox is always in working state, the lubricating system in the electric drive gearbox is also always in working state. At this time, the engine part starts the engine only 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 lubricating oil has good fluidity, so that the lubricating oil in the electric drive gearbox oil pan 211 can be quickly introduced into the bearing position of the supercharger 1 through the lubricating oil pipe 22, so as to achieve the purpose of quickly establishing oil pressure.

[0052] It should be further pointed out that in the present application, the two lubricating oil pipes 22 comprise an oil supply pipe 221 and an oil return pipe 222, the oil supply pipe 221 is used to guide the lubricating oil in the electric drive gearbox oil pan 211 to the supercharger 1, and the oil return pipe 222 is used to return the lubricating oil at the supercharger 1 to the electric drive gearbox oil pan 211, so as to complete the circulation of the lubricating oil.

[0053] Further, the present application does not limit the specific setting position of the on-off structure 3. In an embodiment of the present application, 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. In another embodiment of the present application, 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 setting position of the on-off structure 3 can be selected according to the requirement, and the present application does not limit this.

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

[0056] Further, the present application does not limit the specific structure of the on-off structure 3. In an embodiment of the present application, the on-off structure 3 can be arranged as a mechanical valve. In this way, when it is required to switch the connection or blocking 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 application, the on-off structure 3 can also be arranged as an electrically controlled valve 31. In this way, when it is required to switch the connection or blocking of the oil supply pipeline 221, the electrically controlled valve 31 can have higher precision, thereby quickly responding to complete the switching of the on-off of the oil supply pipeline 221, so as to ensure the efficiency of the automobile engine lubricating system.

[0058] In the embodiment, the on-off structure 3 is arranged as the electrically controlled valve 31.

[0059] Of course, when the on-off structure 3 is arranged as the electrically controlled valve 31, the present application also does not limit the specific valve form of the electrically controlled valve 31. In an embodiment of the present application, the electrically controlled valve 31 can be arranged as a ball valve. In another embodiment of the present application, the electrically controlled valve 31 can also be arranged as a butterfly valve.

[0060] In other embodiments of the present application, the electrically controlled valve 31 can also be arranged as a stop valve, a gate valve, or other valve forms. In actual arrangement, the selection can be made according to the requirement, and the present application does not limit this.

[0061] In addition, in order to ensure that the lubricating oil in the electrically-driven gearbox oil pan 211 can flow to the supercharger 1 when the on-off structure 3 is connected to the corresponding lubricating oil pipeline 22, it is also necessary to provide driving force for the lubricating oil in the lubricating oil circuit, so as to realize the circulating flow of the lubricating oil. In an embodiment of the present application, the oil supply structure 2 further comprises an electrically-driven gearbox oil pump 23 arranged in one of the lubricating oil pipelines 22, which is used 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 electrically-driven gearbox oil pump 23 can provide driving force for the lubricating oil in the lubricating oil circuit, so as to realize the circulating flow of the lubricating oil, thereby driving the lubricating oil from the electrically-driven gearbox oil pan 211 to the supercharger 1, so as to provide lubrication for the supercharger 1 through the electrically-driven gearbox lubrication system.

[0062] It can be understood that the present application does not limit the specific arrangement position of the electrically-driven gearbox oil pump 23. In an embodiment of the present application, the electrically-driven gearbox oil pump 23 can be arranged on the oil supply pipeline 221. In this way, the electrically-driven gearbox oil pump 23 is used to drive the lubricating oil in the electrically-driven gearbox oil pan 211 to the supercharger 1, and further pressure drives the lubricating oil at the supercharger 1 to return to the electrically-driven gearbox oil pan 211 through the oil return pipeline 222, so as to realize the circulating flow of the lubricating oil.

[0063] In another embodiment of the present application, the electrically-driven gearbox oil pump 23 can also be arranged on the oil return pipeline 222. In this way, the electrically-driven gearbox oil pump 23 is used to suck the lubricating oil at the supercharger 1 into the electrically-driven gearbox oil pan 211, at this time, the supercharger 1 generates negative pressure, which can further suck the lubricating oil in the gearbox oil pan to the supercharger 1 through the oil supply pipeline 221, so as to realize the circulating flow of the lubricating oil.

[0064] In summary, the specific arrangement position of the electrically-driven gearbox oil pump 23 can be selected according to the requirements, and the present application does not limit this.

[0065] Specifically, in the present embodiment, the electrically-driven gearbox oil pump 23 is arranged on the oil supply pipeline 221.

[0066] The present application also proposes a control method of 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 application, the control method of the hybrid vehicle engine lubrication system 100 comprises:

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

[0068] It can be understood that the hybrid vehicle has an engine output unit and a motor output unit, and thus the hybrid vehicle has multiple power output modes, and it is necessary to determine the demand of the specific power output mode of the hybrid vehicle.

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

[0070] It can be understood that the different power output modes of the hybrid vehicle have different lubrication demands. 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; and 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 scheme of the present application, since the hybrid vehicle has multiple different power output modes, before determining the specific lubrication method of the hybrid vehicle, the power demand of the hybrid vehicle is first acquired, and then the lubrication method of the engine lubrication system 100 of the hybrid vehicle is selected according to the power demand, so as to lubricate the multiple power output modes of the hybrid vehicle, thereby reducing the energy consumption generated by the lubrication work and improving the service life of multiple components.

[0072] It can be understood that please refer to Figure 3 When the hybrid vehicle is in pure electric output, in the second embodiment of the present application, the step S200 includes:

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

[0074] In the technical scheme of the present embodiment, when the power demand is pure electric power output, it indicates that only the motor is working at this time, i.e. the engine is not working, and thus the supercharger 1 does not need to be lubricated. At this time, the on-off structure 3 is controlled to block the corresponding lubricating oil pipeline 22, so as to prevent the lubricating oil in the electric drive gearbox oil pan 211 from flowing to the supercharger 1, and the lubricating oil in the electric drive gearbox oil pan 211 only lubricates the electric drive gearbox.

[0075] Further, please refer to Figure 4 When the hybrid vehicle needs to switch to hybrid power output, in the third embodiment of the present application, the step S200 includes:

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

[0077] It can be understood that when the power demand is hybrid power output, it indicates that the engine and the motor are both ready to work at this time, and therefore, the supercharger 1 needs to be lubricated at this time, the on-off structure 3 is controlled to communicate 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 the oil pressure of the oil circuit of the supercharger 1 is established in advance.

[0078] S230, starting the engine.

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

[0080] In the technical scheme of the embodiment, when the power demand is hybrid power output, it indicates that the motor and the engine are both ready to work at this time, and therefore, the supercharger 1 needs to be lubricated at this time, the on-off structure is controlled to communicate the corresponding lubricating oil pipeline 22, so that the electric drive gearbox lubricating oil in the oil supply part 21 can be filled to the oil circuit of the supercharger 1 before the engine is started, and the oil pressure of the oil circuit of the supercharger 1 is established, and then the engine is started, to ensure that the supercharger 1 can be directly lubricated when it is started to avoid bearing wear and prolong the service life of the supercharger 1.

[0081] Please refer to Figure 5 In the fourth embodiment of the application, after the step S230, the method further comprises:

[0082] S240, acquiring the power demand again;

[0083] It can be understood that after the hybrid vehicle enters the hybrid power output mode, the hybrid vehicle will not stay in this mode all the time, and therefore, the power demand needs to be acquired again to switch the corresponding lubrication mode 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, the engine is turned off;

[0085] It can be understood that when the power demand is pure electric power output, it indicates that only the motor is ready to work at this time, i.e., the engine does not work, and therefore, the engine needs to be turned off at this time.

[0086] S260, acquire the shutdown time of the engine;

[0087] It should be noted that after the engine is turned off, the supercharger 1 does not immediately stop rotating, but still maintains a high-speed rotating state under the action of inertia, at this time, the supercharger 1 still needs to be supplied with lubricating oil for lubrication.

[0088] Because when the engine is shut down, the engine oil pump cannot continue to pump oil, in order to avoid wear of the engine during the time when the supercharger 1 is in a high-speed rotating state after the engine is shut down, the on-off structure 3 continuously communicates the corresponding lubricating oil passage, so that the lubricating oil in the electric drive gearbox can still supply the supercharger 1 with lubricating oil, to ensure good lubrication of the bearings of the supercharger 1 during engine shutdown.

[0089] S270, if the shutdown time is higher than the 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 shutdown time is higher than the preset time threshold, it means that the supercharger 1 has left the high-speed rotating state at this time, and lubricating oil does not need to be supplied to the supercharger 1 any more. 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, and 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 scheme of the embodiment, after the engine runs for a certain time, if the power demand of the hybrid vehicle needs to be switched from the hybrid power output to the pure electric power output, the engine no longer needs to provide power at this time, and therefore the engine is turned off to make the engine shut down. However, after the engine is shut down, the supercharger 1 still maintains a high-speed rotating state due to inertia. At this time, because the engine is shut down, the engine oil pump cannot continue to pump oil, and therefore the lubricating oil in the electric drive gearbox oil pan 211 continuously supplies the supercharger 1 with oil, to ensure the lubrication performance of the supercharger 1 in a high-speed rotating state and the service life of the bearings of the supercharger 1. When the shutdown time is higher than the preset time threshold, it means that the supercharger 1 has left the high-speed rotating state at this time, and lubricating oil does not need to be supplied to the supercharger 1 any more. 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, and 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] Please refer to Figure 6 And in the fifth embodiment of the application, before the step S100, further comprising:

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

[0094] It can be understood that the viscosity of the lubricating oil is greatly related to the temperature, the lower the temperature, the greater the viscosity of the lubricating oil, therefore, when the hybrid vehicle is started, the current electric drive gearbox oil temperature of the hybrid vehicle needs to be obtained to determine the viscosity of the lubricating oil.

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

[0096] It should be noted that when the electric drive gearbox oil temperature is lower than the preset temperature threshold, it indicates that the viscosity of the lubricating oil is too high at this time, which has a great influence 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 be connected to the corresponding lubricating oil pipeline 22, so that the lubricating oil in the electric drive gearbox oil pan 211 can flow to the supercharger 1.

[0097] S003, starting the engine.

[0098] In this way, the engine is started and high-temperature gas is discharged. Since the supercharger 1 pressurizes the engine intake air by the high-temperature exhaust gas of the engine, the intermediate temperature of the supercharger 1 rises very quickly. 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 quickly, thereby improving the transmission efficiency of the electric drive gearbox and reducing the energy consumption of the hybrid vehicle.

[0099] In the technical scheme of the embodiment, when the hybrid vehicle is cold started, the temperature is lower than the preset temperature threshold, and the viscosity of the lubricating oil is too high, thereby affecting the transmission power of the electric drive gearbox. Therefore, at this time, the temperature of the lubricating oil needs to be quickly raised, the on-off structure 3 is connected to the corresponding lubricating oil pipeline 22, so that the lubricating oil in the electric drive gearbox oil pan 211 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 quickly, thereby improving the transmission efficiency of the electric drive gearbox and reducing the energy consumption of the hybrid vehicle.

[0100] It also needs to be explained 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 heating the lubricating oil of the supercharger 1, the oil temperature of the lubricating oil also needs to be obtained at any time, when the oil temperature of the lubricating oil is higher than the preset oil temperature threshold, it indicates that the lubricating oil does not need to be heated at this time, the engine is stopped, and the on-off structure 3 is controlled to block the corresponding lubricating oil pipeline 22, so as to save the energy consumption of the electric drive gearbox oil pump 23.

[0101] The application also provides a hybrid vehicle, which comprises the hybrid vehicle engine lubricating system 100 and a control device, and the specific structure of the hybrid vehicle engine lubricating system 100 is referred to the above-mentioned embodiments, since the hybrid vehicle adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0102] The control device comprises a memory, a processor and a computer program stored on the memory and executable on the processor, and the computer program is configured to realize the steps of the control method of the hybrid vehicle engine lubricating system 100.

[0103] It needs to be explained that the application does not limit the specific carrier of the control device, in an embodiment of the application, the carrier of the control device can be set as the above-mentioned hybrid vehicle engine lubricating system 100, that is, the hybrid vehicle engine lubricating system 100 also comprises the control device, and in other embodiments of the application, the carrier of the control device can also be set as other structures, which is not limited in the application.

[0104] Reference will be made to the accompanying drawings below Figure 7 which shows a structural diagram of a control device suitable for implementing embodiments of the application. The control device in the embodiments of the application can include but is not limited to mobile terminals such as mobile phones, notebook 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) and the like, and fixed terminals such as digital TVs, desktop computers and the like. Figure 7 The control device shown is only an example and should not impose any limitation on the functions and use range of the embodiments of the application.

[0105] As Figure 7As shown, the control device can include a processing device 1001 (for example, a central processor, a graphics processor, etc.), which can perform various appropriate actions and processes according to programs stored in a read only memory (ROM: Read Only Memory) 1002 or programs loaded from a storage device 1003 into a random access memory (RAM: Random Access Memory) 1004. In the RAM 1004, various programs and data required for the operation of the control device are also stored. The processing device 1001, the ROM 1002, and the RAM 1004 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.; the storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the control device to communicate with other devices wirelessly or by wire to exchange data. Although Figure 7 A control device having various systems is shown in the middle, but it should be understood that all of the systems shown are not required to be implemented or possessed. More or fewer systems can be alternatively implemented or possessed.

[0106] In particular, according to the embodiments of the present disclosure, the processes described above with reference to the flowcharts can be implemented as a computer software program. For example, the embodiments of the present disclosure include a computer program product comprising a computer program carried on a computer readable medium, the computer program containing program code for executing the method shown in the flowchart. In such embodiments, the computer program can be downloaded and installed from a network through the 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 embodiments of the present disclosure are performed.

[0107] The control device provided by the present application 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 easy to waste engine power in the process of lubricating the supercharger, leading to oil pressure rising, and unable to quickly meet the lubrication demand of the supercharger when the engine starts, easily leading to bearing wear and reducing the service life. Compared with the prior art, the control device provided by the present application has the same beneficial effects as the control method of the hybrid vehicle engine lubrication system 100 provided by the above embodiment, and other technical features in the control device are the same as the features disclosed in the previous embodiment method, which will not be repeated here.

[0108] It should be understood that various aspects disclosed herein can be implemented in hardware, software, firmware, or a combination thereof. In the description above, specific terminology is used to describe particular features, structures, materials or characteristics. It should be understood, however, that the terminology is used only for the purpose of providing a more detailed description of the embodiments and is in no way intended to limit the scope of the disclosure.

[0109] The above description is merely illustrative of the application and is not intended to limit the scope of the application. Variations and modifications exist within the scope of the present application which can be made by those of ordinary skill in the art without departing from the spirit of the application.

Claims

1. A control method of a hybrid vehicle engine lubrication system, characterized by, The application discloses a lubricating system for a hybrid vehicle engine, which comprises a supercharger, an oil supply structure and an on-off structure. The supercharger is used for supercharging engine intake air through engine exhaust. The oil supply structure comprises an oil supply part and two lubricating oil pipelines arranged at intervals. Both of the two lubricating oil pipelines are communicated with the oil supply part and the supercharger to form a lubricating oil loop. The lubricating oil flows from the oil supply part to the supercharger through one of the lubricating oil pipelines and then returns to the oil supply part through the other lubricating oil pipeline. The oil supply part comprises an electrically-driven gearbox oil pan. The on-off structure is arranged on one of the lubricating oil pipelines and can communicate or block the corresponding lubricating oil pipeline. The control method of the lubricating system for the hybrid vehicle engine comprises the following steps: acquiring power demand of the hybrid vehicle; selecting a lubricating method of the lubricating system for the hybrid vehicle engine according to the power demand; before the step of acquiring the power demand of the hybrid vehicle, the method further comprises the following steps: starting the hybrid vehicle and acquiring electrically-driven gearbox oil temperature of the hybrid vehicle; if the electrically-driven gearbox oil temperature is lower than a preset temperature threshold, controlling the on-off structure to communicate the corresponding lubricating oil pipeline; starting the engine.

2. The control method of a hybrid vehicle engine lubrication system according to claim 1, characterized by, The step of selecting the lubricating method of the lubricating system for the hybrid vehicle engine according to the power demand comprises the following steps: if the power demand is pure electric power output, controlling the on-off structure to block the corresponding lubricating oil pipeline.

3. The control method of a hybrid vehicle engine lubrication system according to claim 1, characterized by, The step of selecting the lubricating method of the lubricating system for the hybrid vehicle engine according to the power demand comprises the following steps: if the power demand is hybrid power output, controlling the on-off structure to communicate the corresponding lubricating oil pipeline; starting the engine.

4. The control method of the hybrid vehicle engine lubrication system according to claim 3, characterized by, After the step of starting the engine, the method further comprises the following steps: acquiring the power demand again; if the power demand is switched from the hybrid power output to the pure electric power output, stopping the engine; acquiring stop time of the engine; if the stop time is higher than a preset time threshold, controlling the on-off structure to block the corresponding lubricating oil pipeline.

5. The control method of a hybrid vehicle engine lubrication system according to claim 1, characterized by, The two lubricating oil pipelines comprise an oil supply pipeline and an oil return pipeline. The on-off structure is arranged on the oil supply pipeline.

6. The control method of a hybrid vehicle engine lubrication system according to claim 1, characterized by, The on-off structure comprises an electrically-controlled valve.

7. The control method of a hybrid vehicle engine lubrication system according to claim 1, characterized by, The oil supply structure further comprises an electrically-driven gearbox oil pump arranged on one of the lubricating oil pipelines to drive the lubricating oil to circulate in the lubricating oil loop.

8. A hybrid vehicle characterized by comprising: The application further discloses a hybrid vehicle engine lubricating system and a control device. The control device comprises 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 lubricating system for the hybrid vehicle engine. ​ ​

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