Lubrication Method and Device for Range Extender, Hybrid Vehicle

Abstract

An embodiment of the present application provides a lubrication method and device for a range extender and a hybrid vehicle. The lubrication method includes: obtaining a first duration when the range extender is not started; when the first duration is greater than a first preset duration, sending a first instruction to an electric lubrication device, where the first instruction is used to instruct the electric lubrication device to perform a forced lubrication operation. Through the present application, the risk of damage to the friction pairs inside the range extender caused by the movement of the whole vehicle in the absence of lubricating oil can be reduced.

Description

Technical Field

[0001] This application relates to the technical field of vehicle engineering, and particularly to a lubrication method and device for a range extender, and a hybrid vehicle. Background Art

[0002] The range extender of a hybrid vehicle includes an engine and a generator. The engine outputs torque to drive the generator to generate electricity. The generator charges the battery and supplies power to the drive motor. When the vehicle's battery power is insufficient, the range extender can be started to charge the vehicle.

[0003] When the range extender is working, the engine and generator of the range extender work to drive the mechanical oil pump. For example, the drive gear of the engine drives the gear on the mechanical oil pump to rotate, and pumps the engine oil in the oil sump to the internal friction pairs. If the range extender does not start for a long time, the internal friction pairs of the range extender vibrate relative to each other without lubricating oil, which may cause damage to the internal friction pairs of the range extender. Summary of the Invention

[0004] In view of this, embodiments of this application are expected to provide a lubrication method and device for a range extender, and a hybrid vehicle, so as to solve the technical problem that when the range extender is not working, the internal friction pairs are damaged due to the movement of the whole vehicle.

[0005] To achieve the above object, the technical solution of the embodiments of this application is realized as follows:

[0006] This application provides a lubrication method for a range extender. The lubrication method includes: obtaining a first duration when the range extender is not started; when the first duration is greater than a first preset duration, sending a first instruction to an electric lubrication device, where the first instruction is used to instruct the electric lubrication device to perform a forced lubrication operation.

[0007] In one implementation, the lubrication method further includes: after sending the first instruction to the electric lubrication device, clearing the first duration and starting to record the first duration again.

[0008] In one implementation, the electric lubrication device performs a forced lubrication operation, including: the electric lubrication device continuously operates at a first speed for a first working duration and then stops.

[0009] In one implementation, the lubrication method further includes: when it is determined that the range extender has a start requirement, sending a second instruction to the electric lubrication device, where the second instruction is used to instruct the electric lubrication device to perform a lubrication operation.

[0010] In one implementation, the electric lubrication device performs a lubrication operation, including: the electric lubrication device continuously operates for a second working duration and then stops.

[0011] In one implementation, the lubrication method further includes that when the second working duration is greater than the second preset duration, clearing the first duration and starting to record the first duration again.

[0012] In one implementation, when the electric lubrication device performs a lubrication operation, it further includes: the electric lubrication device operates at a second rotational speed.

[0013] In one implementation, obtaining the first duration when the range extender is not started includes: obtaining the time signal and the time validity signal of the vehicle-mounted networking controller; determining the first duration according to the time signal and the time validity signal.

[0014] In one implementation, the lubrication method further includes: obtaining the ambient temperature and determining the first preset duration based on the ambient temperature.

[0015] The present application also provides a lubrication device for a range extender, including: an obtaining unit configured to obtain the first duration when the range extender is not started; an electric lubrication device configured to deliver engine oil to the friction pairs of the range extender; and a control unit configured to send a first instruction to the electric lubrication device when the first duration is greater than the first preset duration, where the first instruction is used to instruct the electric lubrication device to perform a forced lubrication operation.

[0016] The present application also provides a hybrid vehicle including the above-mentioned electric lubrication device lubrication system.

[0017] The lubrication method provided by the present application controls the electric lubrication device according to the first duration when the range extender is not started. When the first duration when the range extender is not started is greater than the first preset duration, there is a possibility that the friction pairs inside the range extender lack lubricating oil. By controlling the electric lubrication device to perform a forced lubrication operation, the risk of damage to the friction pairs during vehicle movement due to lack of lubricating oil is reduced, and the reliability of the range extender is improved. At the same time, the range extender does not need to be started during the forced lubrication process, which does not affect the driving experience of the user and improves user satisfaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic flowchart of a lubrication method for a range extender provided by an embodiment of the present application;

[0019] Figure 2 is a schematic flowchart of a lubrication method for a range extender provided by an embodiment of the present application;

[0020] Figure 3 is a schematic structural diagram of a lubrication device for a range extender provided by an embodiment of the present application;

[0021] Figure 4A schematic diagram of the composition structure of a hybrid vehicle provided by an embodiment of the present application. Detailed implementation manners

[0022] Next, in combination with the embodiments of the present disclosure and the accompanying drawings, the technical solutions in the embodiments of the present disclosure will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present disclosure.

[0023] In the following description, a large number of specific details are given to provide a more thorough understanding of the present disclosure. However, it is obvious to those skilled in the art that the present disclosure can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present disclosure, some well-known technical features are not described; that is, not all features of the actual embodiments are described here, and the well-known functions and structures are not described in detail.

[0024] In the drawings, for clarity, the dimensions of layers, regions, elements and their relative dimensions may be exaggerated. The same reference numerals throughout the drawings denote the same elements.

[0025] It should be understood that when an element or layer is referred to as "on", "adjacent to", "connected to" or "coupled to" another element or layer, it can be directly on, adjacent to, connected or coupled to the other element or layer, or there may be intervening elements or layers. In contrast, when an element is referred to as "directly on", "directly adjacent to", "directly connected to" or "directly coupled to" another element or layer, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the teachings of the present disclosure, the first element, component, region, layer or part discussed below may be referred to as the second element, component, region, layer or part. And when discussing the second element, component, region, layer or part, it does not mean that the present disclosure necessarily has the first element, component, region, layer or part.

[0026] Spatial relationship terms such as "under", "below", "lower", "beneath", "above", "upper", etc. may be used herein for convenience of description to describe the relationship of one element or feature shown in the figures with other elements or features. It should be understood that, in addition to the orientations shown in the figures, spatial relationship terms are also intended to include different orientations of the device during use and operation. For example, if the device in the drawings is flipped, then an element or feature described as "under other elements" or "beneath them" or "below them" will be oriented "above" the other elements or features. Thus, the exemplary terms "under" and "beneath" can include both the upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or other orientations) and the spatial descriptors used herein are to be interpreted accordingly.

[0027] The purpose of the terms used herein is only to describe specific embodiments and is not a limitation of the present disclosure. As used herein, the singular forms "a", "an" and "the" are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprising" and / or "including", when used in this specification, specify the presence of the stated features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups. As used herein, the term "and / or" includes any and all combinations of the associated listed items.

[0028] To fully understand the present disclosure, detailed steps and detailed structures will be presented in the following description to illustrate the technical solutions of the present disclosure. The preferred embodiments of the present disclosure are described in detail below. However, in addition to these detailed descriptions, the present disclosure may have other embodiments.

[0029] It should be noted that, without conflict, the embodiments in the present application and the technical features in the embodiments may be combined with each other. The detailed descriptions in the specific embodiments should be understood as explanatory illustrations of the gist of the present application and should not be regarded as an undue limitation of the present application.

[0030] Before further elaborating on the embodiments of the present application, the nouns and terms involved in the embodiments of the present application are described. The nouns and terms involved in the embodiments of the present application are subject to the following interpretations.

[0031] Range extender: Generally includes an engine and a generator. When the vehicle battery power is insufficient, the range extender can be started to convert the combustion of gasoline or other fuels into electrical energy to provide additional electrical energy to the electric vehicle.

[0032] Friction pair: A system composed of two parts with directly contacting surfaces and relative friction is called a friction pair. With the development of technology, the pure electric driving range of hybrid vehicles has been continuously improved, and it can even reach 200 kilometers, which can fully meet the daily commuting needs of users.

[0033] The inventor found that when users have no long-distance driving needs, there is a possibility of long-term pure electric driving for hybrid vehicles, and the range extender installed in them has no startup requirement for a long time and will not lubricate the friction pairs inside. However, during long-term pure electric driving, the friction pairs inside the range extender will be damaged due to relative movement without lubricating oil.

[0034] If, during pure electric driving, the range extender is forcibly started to pump lubricating oil to lubricate various parts inside the range extender, the sudden startup noise and so on may affect the user's driving experience and reduce user satisfaction.

[0035] Based on the above technical problems, the embodiment of the present application provides a lubrication method for a range extender, and its execution subject can be a vehicle control unit (VCU), a motor control unit (MCU), etc. Please refer to Figure 1 , the lubrication method of the range extender includes:

[0036] Step S101, obtain the first duration when the range extender is not started.

[0037] Step S102, when the first duration is greater than the first preset duration, send a first instruction to the electric lubrication device, and the first instruction is used to instruct the electric lubrication device to perform a forced lubrication operation.

[0038] The range extender is a supplementary power source for hybrid vehicles. When the power battery is insufficient, the vehicle operates in the range extender mode, and the range extender supplies the generated electric energy to charge the power battery; when the power battery is fully charged, the vehicle operates in the pure electric mode, and the power battery supplies power to the whole vehicle without the range extender starting.

[0039] If the vehicle keeps operating in the pure electric mode for a long time, the range extender will face the situation of not needing to start for a long time. Exemplarily, taking 20 kilometers for commuting to and from work as the daily commuting distance, a pure electric driving range of 200 kilometers can fully meet the user's driving for a week in the pure electric mode, and after charging, the vehicle can continue to operate in the pure electric mode.

[0040] Since the range extender has not been started for a long time, the engine oil inside it will accumulate in the oil pan, and the engine oil on the surface of the friction pair is not sufficient to meet the lubrication conditions. At this time, if the range extender still moves with the whole vehicle, the relative vibration of the directly contacting parts inside it will cause dry friction, which is very likely to cause damage to the friction pair. To reduce the occurrence of the above damage, it is necessary to establish engine oil pressure before dry friction occurs so that the surface of the friction pair is fully lubricated. By comparing the first duration when the range extender is not started and the first preset duration, it can be determined whether the electric lubrication device needs forced lubrication.

[0041] In actual implementation, the first preset duration can be obtained through bench tests. Exemplarily, it can be determined by the vibration amplitude of bench tests: after a hybrid vehicle travels purely electrically for a period of time, such as 30 days, it is necessary to lubricate the friction pair. That is, the first preset duration is determined to be 30 days. When the first duration is greater than 30 days, a first instruction is sent to the electric lubrication device, and the electric lubrication device operates according to the first instruction, extracts engine oil and transports it to each friction pair of the range extender to complete the lubrication work. The above first duration can be calculated according to the actual number of days of pure electric driving, such as 30 days or 45 days, etc.; it can also be calculated according to the duration when the range extender is not started in the start state of the hybrid vehicle or the total duration of pure electric driving. For example, the pure electric driving is 500 hours.

[0042] In some embodiments, the lubrication method further includes: obtaining the ambient temperature and determining the first preset duration based on the ambient temperature.

[0043] In actual implementation, the first preset duration can be obtained through bench tests. Exemplarily, it is determined by the test vibration amplitude at different ambient temperatures. The lower the ambient temperature, the shorter the corresponding first preset duration. When the ambient temperature is less than zero degrees, the first preset duration can be set to 20 days. When the first duration when the range extender is not started is greater than 20 days, a first instruction is sent to the electric lubrication device, and the electric lubrication device operates according to the first instruction, extracts engine oil and transports it to each friction pair of the range extender to complete the lubrication work.

[0044] The lubrication method provided by the present application controls the electric lubrication device according to the first duration when the range extender is not started. When the first duration when the range extender is not started is greater than the first preset duration, there is a possibility that the friction pairs inside the range extender lack lubricating engine oil. By controlling the electric lubrication device to perform forced lubrication operations, the risk of damage to the friction pairs during movement with the whole vehicle in the case of lack of lubricating engine oil is reduced, and the reliability of the range extender is improved. At the same time, the range extender does not need to be started during the forced lubrication process, which will not affect the user's driving experience and improves user satisfaction.

[0045] In some embodiments, obtaining the first duration when the range extender is not started includes: obtaining the time signal and time validity signal of the vehicle-mounted networking controller; and determining the first duration according to the time signal and time validity signal.

[0046] In actual implementation, the vehicle-mounted networking controller may be a TBOX (Telematics Box). The time signal may include year, month, day, hour, minute, and second. The time validity signal (e.g., timeValid) may include a time validity signal for indicating valid time (e.g., timeValid = VALID) and a time validity signal for indicating invalid time (e.g., timeValid = INVALID).

[0047] Specifically, when the TBOX cannot obtain or transmit the time signal (e.g., during network disconnection or restart), the TBOX defaults to sending the time validity signal timeValid = INVALID; when the TBOX can obtain and transmit the time signal, the TBOX sends the real-time time signal and the time validity signal timeValid = VALID, and calculates the first duration during which the range extender has not been started based on the time signal.

[0048] In one embodiment, when the real-time time signal T and the time validity signal timeValid = VALID are received simultaneously, the difference duration ΔT between the current time signal T and the time T0 when the first duration was zero last time is calculated, and the first duration is updated to the difference duration ΔT. Calculating the first duration during which the range extender has not been started only when the time signal is marked as valid avoids the situation where the time signal T may temporarily return to the factory time during network disconnection or restart, resulting in miscalculation of the first duration during which the range extender has not been started.

[0049] In some embodiments, the electric lubrication device performs a forced lubrication operation, including: the electric lubrication device continuously operates at a first speed for a first working duration and then stops.

[0050] In actual implementation, the first speed may be determined according to the maximum speed of the electric lubrication device. It should be noted that the electric lubrication device can be controlled by a Pulse Width Modulation (PWM) signal sent by the control unit, that is, different speeds are obtained by modulating the duty cycle. When other conditions are the same, the larger the duty cycle, the higher the speed of the electric lubrication device. When the duty cycle is 0, the speed of the electric lubrication device is 0, and when the duty cycle is 1, the electric lubrication device has the maximum speed.

[0051] In one embodiment, the speed of the electric lubrication device corresponding to a duty cycle equal to 1 can be set as the first speed. Considering that when the duty cycle is greater than 0.8 and then continues to increase, the growth rate of the speed of the electric lubrication device is small, so the speed corresponding to a duty cycle equal to 0.8 can also be set as the first speed.

[0052] It should be noted that the first working duration can be the single working duration of the electric lubrication device.

[0053] In actual implementation, the first working duration can be determined through bench tests. Exemplarily, the shortest time for the electric lubrication device to successfully establish the target oil pressure at the maximum rotational speed is set as the first working duration (for example, 2 minutes). If the first working duration is too short, it may cause the oil pressure not to be successfully established, making it difficult to lubricate the internal friction pairs; if the time is too long, it may cause the electric lubrication device to restart repeatedly. The first working duration determined by this method can not only enable the oil pressure to be successfully established but also reduce the running time of the electric lubrication device; it will neither reduce the lubrication effect due to insufficient oil pressure nor cause excessive wear of the electric lubrication device due to excessive oil pressure.

[0054] In some embodiments, please refer to Figure 2 , the lubrication method of the range extender further includes:

[0055] Step S103, after sending the first instruction to the electric lubrication device, clear the first duration and start recording the first duration again.

[0056] Specifically, after the electric lubrication device continuously operates at the first rotational speed for the first working duration, that is, after completing a forced lubrication operation, the first duration when the range extender is not started is cleared.

[0057] In some embodiments, the lubrication method further includes: when it is determined that the range extender has a startup requirement, send a second instruction to the electric lubrication device, and the second instruction is used to instruct the electric lubrication device to perform a lubrication operation.

[0058] In one embodiment, when the hybrid vehicle has insufficient power, for example, when the electric energy of the battery is lower than a preset value, it is determined that the range extender has a startup requirement, and the range extender starts to operate and provide electric energy.

[0059] In some embodiments, for the electric lubrication device to perform a lubrication operation, it further includes: the electric lubrication device operates at a second rotational speed.

[0060] In actual implementation, after the range extender starts, the electric lubrication device starts to perform a lubrication operation, so that the engine oil continuously circulates in the lubricating oil path to meet the lubrication requirements during the operation of the range extender. The second rotational speed of the electric lubrication device can be determined by multiple parameters, such as the main oil passage pressure, engine water temperature, etc. During the startup of the range extender, the second rotational speed may include multiple different rotational speeds. The vehicle control unit can adjust the duty cycle to achieve speed switching according to the actual requirements of each component. It should be noted that the second rotational speed in the embodiments of the present application can be less than or equal to the maximum rotational speed of the electric lubrication device, and its specific value is not limited.

[0061] In some embodiments, the lubrication operation of the electric lubrication device includes: the electric lubrication device stops after continuously operating for a second working duration.

[0062] In some embodiments, when the second working duration is greater than a second preset duration, the first duration is cleared and recording of the first duration starts again, where the second preset duration is greater than the first working duration.

[0063] Specifically, after the electric lubrication device operates for the second working duration, it is determined whether the second working duration is greater than the second preset duration. When the second working duration is greater than the second preset duration, it is determined that the electric lubrication device has completed a lubrication operation, and the first duration when the range extender is not started is cleared and recording starts again. Considering that the second rotational speed may change after the range extender is started. That is, the electric lubrication device does not continuously operate at the highest rotational speed during the operation of the range extender. In this case, the electric lubrication device continuously operating for the first working duration cannot successfully establish the oil pressure. To meet the lubrication requirements, the second preset duration can be set to be greater than the first working duration. Of course, the second preset duration can also be determined through bench tests. Exemplarily, the second preset duration can be set to 6 minutes. When the second working duration is greater than 6 minutes, it can be determined that the oil pressure has been successfully established and the electric lubrication device has completed a lubrication operation.

[0064] This application also provides a lubrication device for a range extender, as Figure 3 shown. The lubrication device 100 includes an acquisition unit 110, an electric lubrication device 120, and a control unit 130. Among them, the acquisition unit 110 is used to acquire the first duration when the range extender is not started; the electric lubrication device 120 is used to deliver engine oil to the friction pairs of the range extender; the control unit 130 is configured to send a first instruction to the electric lubrication device 120 when the first duration is greater than a first preset duration, and the first instruction is used to instruct the electric lubrication device 120 to perform a forced lubrication operation.

[0065] The control unit 130 controls the electric lubrication device 120 according to the first duration when the range extender is not started. When the first duration when the range extender is not started is greater than the first preset duration, there is a possibility that the friction pairs inside the range extender lack lubricating oil. The control unit 130 controls the electric lubrication device 120 to perform a forced lubrication operation, reducing the risk of damage to the friction pairs during the movement of the whole vehicle in the case of lack of lubricating oil, and improving the reliability of the range extender. At the same time, the range extender does not need to be started during the forced lubrication process, which does not affect the user's driving experience and improves user satisfaction.

[0066] This application also provides a hybrid vehicle, as Figure 4 shown: The hybrid vehicle 200 includes the range extender 140 in the above embodiments and the lubrication device 100 of the range extender.

[0067] Those of ordinary skill in the art can understand that all or part of the steps to implement the above method embodiments can be completed by hardware related to program instructions. The foregoing program can be stored in a computer-readable storage medium. When the program is executed, it performs the steps including the above method embodiments; and the foregoing storage medium includes: various media such as removable storage devices, read-only memory (ROM), magnetic disks, or optical discs that can store program codes.

[0068] Alternatively, if the above integrated units of the present application are implemented in the form of software function modules and sold or used as independent products, they can also be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the embodiments of the present application, in essence or the part that contributes to the related art, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the methods described in the various embodiments of the present application. And the foregoing storage medium includes: various media such as removable storage devices, ROM, magnetic disks, or optical discs that can store program codes.

[0069] The various embodiments / implementations provided in the present application can be combined with each other without conflict.

[0070] The foregoing are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

[0071] It should be understood that the "one embodiment" or "an embodiment" mentioned throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present disclosure. Therefore, the appearances of "in one embodiment" or "in an embodiment" throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in the various embodiments of the present disclosure, the magnitudes of the sequence numbers of the above processes do not mean the order of execution is prior or posterior. The order of execution of each process should be determined by its function and internal logic and should not constitute any limitation to the implementation process of the embodiments of the present disclosure. The sequence numbers of the embodiments of the present disclosure above are only for description and do not represent the advantages or disadvantages of the embodiments.

[0072] The above are only the preferred embodiments of the present disclosure, and do not limit the patent scope of the present disclosure. Any equivalent structural transformation made under the inventive concept of the present disclosure by using the content of the specification and drawings of the present disclosure, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present disclosure.

Claims

1. A lubrication method for a range extender, characterized in that, The lubrication method includes: Obtaining a first duration when the range extender is not started, including: obtaining a time signal and a time validity signal of a vehicle-mounted networking controller; determining the first duration according to the time signal and the time validity signal; Wherein, only when receiving the time validity signal for indicating time validity, calculating a difference duration between the current time signal and the time when the first duration was zero last time, and updating the first duration to the difference duration; the time validity signal includes a time validity signal for indicating time validity sent by the vehicle-mounted networking controller when it can obtain and transmit a time signal; when the first duration is greater than a first preset duration, sending a first instruction to the electric lubrication device, the first instruction being used to instruct the electric lubrication device to perform a forced lubrication operation; When it is determined that the range extender has a start requirement, sending a second instruction to the electric lubrication device, the second instruction being used to instruct the electric lubrication device to perform a lubrication operation.

2. The lubrication method of the range extender according to claim 1, characterized in that The lubrication method further includes: After sending the first instruction to the electric lubrication device, clearing the first duration and starting to record the first duration again.

3. The lubrication method of the range extender according to claim 2, wherein The electric lubrication device performing a forced lubrication operation includes: the electric lubrication device continuously operating at a first rotation speed for a first working duration and then stopping.

4. The lubrication method of the range extender according to claim 3, wherein, The lubrication method further includes: The electric lubrication device performing a lubrication operation includes: the electric lubrication device continuously operating for a second working duration and then stopping.

5. The lubrication method of the range extender according to claim 4, characterized in that, The lubrication method further includes: When the second working duration is greater than a second preset duration, clearing the first duration and starting to record the first duration again.

6. The lubrication method of the range extender according to claim 5, wherein The electric lubrication device performing a lubrication operation further includes: the electric lubrication device operating at a second rotation speed.

7. The lubrication method of the range extender according to claim 1, characterized in that, The lubrication method further includes: Obtaining an ambient temperature and determining the first preset duration based on the ambient temperature.

8. A lubrication device for a range extender, which is used to lubricate the range extender in a hybrid vehicle equipped with a vehicle-mounted network controller, is characterized in that, Including: An acquisition unit for obtaining a first duration when the range extender is not started, including: obtaining a time signal and a time validity signal of a vehicle-mounted networking controller; determining the first duration according to the time signal and the time validity signal; Wherein, only when receiving the time validity signal for indicating time validity, calculating a difference duration between the current time signal and the time when the first duration was zero last time, and updating the first duration to the difference duration; the time validity signal includes a time validity signal for indicating time validity sent by the vehicle-mounted networking controller when it can obtain and transmit a time signal; An electric lubrication device for delivering engine oil to a friction pair of the range extender; A control unit configured to, when the first duration is greater than a first preset duration, send a first instruction to the electric lubrication device, the first instruction being used to instruct the electric lubrication device to perform a forced lubrication operation; when it is determined that the range extender has a start requirement, send a second instruction to the electric lubrication device, the second instruction being used to instruct the electric lubrication device to perform a lubrication operation.

9. A hybrid vehicle, characterized in that, Including: Range extender; Lubrication device for a range extender, configured to perform the lubrication method according to any one of claims 1 to 7.

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