Engine lubrication control method, engine lubrication control device, and storage medium

Abstract

The present disclosure provides an engine lubrication control method and device and a storage medium. The method is applied to a hybrid vehicle and includes: when it is detected that the vehicle is in a target driving state, determining a cumulative vibration amount of an engine friction pair in the vehicle within a duration of the target driving state, wherein the power source of the vehicle in the target driving state only includes a power battery; the cumulative vibration amount represents the wear condition of the engine friction pair; if the cumulative vibration amount reaches a preset vibration amount threshold, starting a range extender in the vehicle; wherein the range extender is at least used to deliver lubricating oil to the engine friction pair after being started.

Description

Technical Field

[0001] This disclosure relates to the field of engine technology, specifically to an engine lubrication control method, engine lubrication control device, and storage medium. Background Technology

[0002] Friction pairs are an indispensable part of an engine, and their wear performance largely determines the engine's reliability and durability.

[0003] When a hybrid vehicle maintains pure electric driving mode for an extended period, the friction pairs inside the engine are prone to damage due to vibrations without lubrication. Furthermore, accumulated wear over time may prevent the range extender from starting.

[0004] In related technologies, a fixed duration is usually set, and lubricating oil is delivered to the friction pairs inside the engine after the pure electric driving time reaches the fixed duration. However, due to different vehicle driving paths, the vibration amplitude and wear of the vehicle during pure electric driving are different, which may lead to over-protection or failure to protect the vehicle. Summary of the Invention

[0005] In view of this, the present disclosure provides an engine lubrication control method, an engine lubrication control device, and a storage medium.

[0006] In a first aspect, embodiments of this disclosure provide an engine lubrication control method applied to a hybrid vehicle, the method comprising:

[0007] When a vehicle is detected to be in a target driving state, the cumulative vibration of the engine friction pair in the vehicle is determined during the duration of the target driving state, wherein the power source of the vehicle in the target driving state consists only of the power battery; the cumulative vibration represents the wear condition of the engine friction pair.

[0008] If the cumulative vibration reaches a preset vibration threshold, the range extender in the vehicle is activated; wherein, after the range extender is activated, it is used at least to deliver lubricating oil to the engine friction pair.

[0009] Optionally, obtaining the preset vibration threshold includes:

[0010] Obtain road map information;

[0011] Based on the road spectrum information, determine the vibration amplitude curve of the vehicle corresponding to the road spectrum information;

[0012] Based on the vibration amplitude curve, the vibration amplitude of the vibration table applied to the test vehicle is controlled.

[0013] The test duration for which the change in starting resistance of the engine in the test vehicle reaches a preset resistance threshold is obtained; wherein, the change in starting resistance is used to indicate the amount of wear caused by the vibration of the engine friction pair in the test vehicle according to the vibration amplitude curve;

[0014] Based on the test duration and the vibration amplitude curve, determine the vibration amount of the engine friction pair cyclically vibrating according to the vibration amplitude curve within the test duration;

[0015] The vibration amount is determined as the vibration amount threshold.

[0016] Optionally, controlling the vibration amplitude of the vibration table acting on the test vehicle based on the vibration amplitude curve includes:

[0017] Obtain the first rotational resistance required for the engine to rotate at the target speed;

[0018] Using the vibration table, the test vehicle is controlled to vibrate according to the vibration amplitude curve;

[0019] Obtain the second rotational resistance required for the engine to rotate at the target speed; wherein, the second rotational resistance is: the rotational resistance of the test vehicle after vibrating the vibration amplitude curve for n cycles; where n is a positive integer greater than or equal to 1;

[0020] The test duration for obtaining the change in starting resistance of the engine in the test vehicle to reach a preset resistance threshold includes:

[0021] The change in starting resistance is determined based on the second rotational resistance and the first rotational resistance;

[0022] If the change in starting resistance reaches the resistance threshold, the duration corresponding to the n cycles is determined as the test duration.

[0023] Optionally, the method further includes:

[0024] If the change in starting resistance does not reach the resistance threshold, the test vehicle is controlled to continue vibrating according to the vibration amplitude curve, and the second rotational resistance is reacquired.

[0025] Optionally, the cumulative vibration amount includes at least: the vibration amount of the vehicle in each of the three-dimensional directions;

[0026] If the cumulative vibration reaches a preset vibration threshold, the range extender in the vehicle is activated, including:

[0027] If the vibration in any direction reaches a preset vibration threshold, the range extender in the vehicle will be activated.

[0028] Optionally, when the vehicle is detected to be in a target driving state, determining the cumulative vibration of the engine friction pair within the vehicle during the duration of the target driving state includes:

[0029] The vehicle is detected to be in the target driving state, and the duration for which the vehicle maintains the target driving state is obtained;

[0030] The vibration amplitude data of the vehicle during the duration is obtained using an acceleration sensor on the engine block.

[0031] Based on the duration and the vibration amplitude data of the vehicle within the duration, the cumulative vibration of the engine friction pair within the duration of the target driving state is determined.

[0032] Optionally, activating the range extender in the vehicle if the cumulative vibration reaches a preset vibration threshold includes:

[0033] If the cumulative vibration reaches a preset vibration threshold, the range extender is activated, and the range extender is controlled to operate continuously for at least a preset duration.

[0034] Optionally, the method further includes:

[0035] After detecting that the range extender in the vehicle is in the activated state and has been running continuously for a preset time, the accumulated vibration amount is initialized.

[0036] Secondly, embodiments of this disclosure provide an engine lubrication control device applied to a hybrid vehicle, the device comprising:

[0037] The determination module is used to determine the cumulative vibration of the engine friction pair within the vehicle during the duration of the target driving state when the vehicle is detected to be in the target driving state, wherein the power source of the vehicle in the target driving state only includes the power battery; the cumulative vibration represents the wear condition of the engine friction pair.

[0038] The starting module is used to activate the range extender in the vehicle if the cumulative vibration reaches a preset vibration threshold; wherein, after the range extender is activated, it is used at least to deliver lubricating oil to the engine friction pair.

[0039] Thirdly, embodiments of this disclosure provide a computer-readable storage medium for storing a computer program, the computer program including instructions for implementing any engine lubrication control method.

[0040] This embodiment of the disclosure determines the cumulative vibration of the engine friction pair within the vehicle during the duration of the target driving state when the vehicle is detected to be in that state. The power source of the vehicle in the target driving state consists only of a power battery. The cumulative vibration represents the wear condition of the engine friction pair. If the cumulative vibration reaches a preset vibration threshold, the range extender in the vehicle is activated. After activation, the range extender is used to deliver lubricating oil to the engine friction pair. Thus, this embodiment of the disclosure determines whether the cumulative vibration reaches a preset vibration threshold based on the cumulative vibration of the vehicle in the target driving state, and further determines whether to activate the range extender. On the one hand, when the cumulative vibration reaches the vibration threshold, the range extender is activated promptly to forcibly lubricate the friction pair, reducing damage. On the other hand, compared to lubrication control based on a fixed duration, this embodiment of the disclosure determines the activation timing of the range extender based on the cumulative vibration that reflects the wear condition of the friction pair under the target driving state, reducing the number of abnormal range extender activations. Attached Figure Description

[0041] Figure 1 This is a flowchart illustrating an engine lubrication control method according to an exemplary embodiment. Figure 1 ;

[0042] Figure 2 This is a flowchart illustrating an engine lubrication control method according to an exemplary embodiment. Figure 2 ;

[0043] Figure 3 This is a flowchart illustrating an engine lubrication control method according to an exemplary embodiment. Figure 3 ;

[0044] Figure 4 This is a flowchart illustrating an engine lubrication control method according to an exemplary embodiment. Figure 4 ;

[0045] Figure 5 This is a block diagram illustrating an engine lubrication control device according to an exemplary embodiment. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the specific technical solutions of the invention will be further described in detail below with reference to the accompanying drawings of the embodiments of this disclosure. The following embodiments are used to illustrate this disclosure, but are not intended to limit the scope of this disclosure.

[0047] This disclosure provides an engine lubrication control method. Figure 1 This is a flowchart illustrating an engine lubrication control method according to an exemplary embodiment. Figure 1 ,like Figure 1 As shown; the method, applied to hybrid vehicles, includes:

[0048] In step S1, when the vehicle is detected to be in the target driving state, the cumulative vibration of the engine friction pair in the vehicle is determined during the duration of the target driving state. The power source of the vehicle in the target driving state consists only of the power battery. The cumulative vibration represents the wear condition of the engine friction pair.

[0049] In step S2, if the cumulative vibration reaches a preset vibration threshold, the range extender in the vehicle is activated; wherein, after the range extender is activated, it is used at least to deliver lubricating oil to the engine friction pairs. The engine lubrication control method shown in this embodiment can be applied to hybrid vehicles, which are hybrid electric vehicles powered by an engine and a power battery.

[0050] It should be noted that friction pairs are an important component of an engine, playing a role in converting motion and transmitting power, and directly affecting engine performance and lifespan.

[0051] In some embodiments, friction pairs can be used to convert motion forms, such as a vehicle's clutch using friction pairs to convert the engine's rotational motion into the wheels' linear motion, thereby enabling the vehicle to move; and friction pairs can be used to transmit power, such as a vehicle's gearbox using friction pairs to transmit the engine's power to the wheels, thereby enabling the vehicle to run.

[0052] Here, the friction pair can be a sliding friction pair or a rolling friction pair, and the embodiments disclosed herein do not limit this.

[0053] It needs to be explained that when a vehicle is in fuel-powered driving mode, the engine continuously supplies oil to the transmission components, forming an oil film between these components. When the engine is running, a certain amount of oil film is maintained between the relatively moving friction pairs, making it less likely for friction to occur between the friction pairs, thereby reducing friction loss, improving the engine's effective power, and ensuring the engine's service life.

[0054] When the vehicle is in pure electric driving mode, the friction pairs inside the engine will vibrate with the vehicle. However, when the range extender is not running, it cannot deliver lubricating oil to the friction pairs of the engine, which will cause damage to the friction pairs. The accumulated wear over a long period of time may also prevent the range extender from starting.

[0055] Clearly, the engine's friction pairs are more susceptible to damage when the vehicle is in pure electric driving mode compared to when the vehicle is in gasoline driving mode.

[0056] Therefore, this embodiment of the disclosure improves the situation where the friction pairs of the engine are severely damaged in pure electric driving mode by obtaining the vibration of the vehicle in pure electric driving mode.

[0057] Here, the power source of the vehicle in the target driving state only includes the power battery, which can be understood as the vehicle maintaining pure electric driving in the target driving state.

[0058] It is understandable that vibrations are generated when a vehicle is running. In order to determine the amount of vibration of the vehicle in pure electric driving mode, the cumulative vibration of the engine friction pair in the vehicle during the duration of the target driving state is only obtained when the vehicle is detected to be in the target driving state (pure electric driving mode).

[0059] It should be noted that vehicle vibration affects ride comfort, safety, and vehicle lifespan. When a vehicle vibrates, internal transmission components also vibrate, such as the friction pairs in the engine. When these components vibrate, they come into contact and generate friction, which over time leads to wear and tear. Therefore, the amount of vehicle vibration can characterize the wear condition of the engine's friction pairs.

[0060] There are many methods for obtaining vehicle vibration data, such as sensor measurement, non-contact laser measurement, or acoustic measurement, and this disclosure does not limit these methods.

[0061] In some embodiments, in order to obtain parameters such as the frequency and amplitude of vehicle vibration, an accelerometer can be installed on the vehicle to measure the vehicle's vibration; a laser interferometer can also be used to measure the vibration on the vehicle's surface; or a microphone or other device can be used to analyze the sound emitted by the vehicle to further determine the vehicle's vibration status.

[0062] Therefore, this embodiment of the present disclosure determines the damage condition of the friction pairs of the engine inside the vehicle by obtaining the cumulative vibration amount of the vehicle. Compared with the prior art, which requires the engine housing to be removed before the wear condition inside the engine can be observed, the judgment method of this embodiment of the present disclosure is more flexible.

[0063] It should be noted that the preset vibration threshold can be obtained from multiple vehicle vibration tests or set by the tester based on experience. This embodiment does not limit this.

[0064] Here, the preset vibration threshold values ​​are different for different vehicle models, and this disclosure does not limit them.

[0065] Understandably, after determining the cumulative vibration of the vehicle, the vibration is compared with a preset vibration threshold, and based on the comparison result, it is determined whether to activate the vehicle's range extender.

[0066] When the cumulative vibration reaches the preset vibration threshold, the vehicle's range extender is activated to deliver lubricating oil to the engine's friction pairs to address the problem of severe wear on the engine's friction pairs.

[0067] When the cumulative vibration amount does not reach the preset vibration amount threshold, it indicates that the wear of the engine friction pair in the vehicle has not yet reached the point where forced lubrication is required. Therefore, it is not necessary to start the vehicle's range extender, which helps to reduce the number of times the range extender is abnormally started.

[0068] This embodiment of the disclosure determines the cumulative vibration of the engine friction pair within the vehicle during the duration of the target driving state when the vehicle is detected to be in that state. The power source of the vehicle in the target driving state consists only of a power battery. The cumulative vibration represents the wear condition of the engine friction pair. If the cumulative vibration reaches a preset vibration threshold, the range extender in the vehicle is activated. After activation, the range extender is used to deliver lubricating oil to the engine friction pair. Thus, this embodiment of the disclosure determines whether the cumulative vibration reaches a preset vibration threshold based on the cumulative vibration of the vehicle in the target driving state, and further determines whether to activate the range extender. On the one hand, when the cumulative vibration reaches the vibration threshold, the range extender is activated promptly to forcibly lubricate the friction pair, reducing damage. On the other hand, compared to lubrication control based on a fixed duration, this embodiment of the disclosure determines the activation timing of the range extender based on the cumulative vibration that reflects the wear condition of the friction pair under the target driving state, reducing the number of abnormal range extender activations.

[0069] Optionally, obtaining the preset vibration threshold includes:

[0070] Obtain road map information;

[0071] Based on the road spectrum information, determine the vibration amplitude curve of the vehicle corresponding to the road spectrum information;

[0072] Based on the vibration amplitude curve, the vibration amplitude of the vibration table applied to the test vehicle is controlled.

[0073] The test duration for which the change in starting resistance of the engine in the test vehicle reaches a preset resistance threshold is obtained; wherein, the change in starting resistance is used to indicate the amount of wear caused by the vibration of the engine friction pair in the test vehicle according to the vibration amplitude curve;

[0074] Based on the test duration and the vibration amplitude curve, determine the vibration amount of the engine friction pair cyclically vibrating according to the vibration amplitude curve within the test duration;

[0075] The vibration amount is determined as the vibration amount threshold.

[0076] It should be noted that road spectrum is a pavement map, referring to the power spectral density curve of road surface unevenness. It can be used to reflect the vehicle's trajectory, road surface undulations, and vehicle driving status. Road spectrum information can be used for laboratory bench tests or multibody dynamics simulation analysis, providing reliable data support and enabling testers to make accurate predictions and judgments about the wear degree of various vehicle components.

[0077] There are many ways to obtain road spectrum information, mainly divided into contact acquisition and non-contact acquisition. Contact acquisition includes: level and pole, multi-wheel instrument or straight beam reference instrument; non-contact acquisition includes: road spectrum method of acceleration measurement of inertial reference, vehicle-mounted bump accelerator or laser profiler of inertial reference. This disclosure does not limit the specific methods.

[0078] Understandably, in order to improve the accuracy of vibration tests, it is necessary to collect at least two sets of road spectrum data for the vehicle under the same road conditions; based on the two sets of road spectrum data, the weight corresponding to each set of road spectrum data is determined; and then based on the weights, the two sets of road spectrum data are integrated into the vehicle's road spectrum information.

[0079] In some embodiments, the collected road spectrum data are compared to determine whether the sensor that acquired the road spectrum information has misjudged or malfunctioned. If the sensor is working properly, the weights of the two road spectrum data are both set to 50%, and the combined data is used to obtain road spectrum information with a weight of 1.

[0080] It should be noted that the vibration amplitude of a vehicle refers to the degree of vertical movement of the vehicle during driving, and the smoothness of the road surface can be inferred from the vibration amplitude.

[0081] It needs to be explained that during vehicle operation, road spectrum information is collected in real time. Since the vibration amplitude is obtained along with the driving data, each point in the vehicle's driving data has corresponding vibration amplitude information. Therefore, obtaining the time corresponding to the driving data is equivalent to obtaining the time range of the vibration amplitude. After obtaining the time corresponding to the driving data, the vibration information needs to be correlated with the driving data to generate a vibration amplitude curve that changes over time.

[0082] Understandably, in order to ensure that the vibration pattern of the test vehicle on the vibration test bench conforms to the road spectrum information, the vibration of the test vehicle should be controlled according to the vibration amplitude curve of the vehicle corresponding to the road spectrum information, so as to reproduce the vibration of the vehicle traveling on the road corresponding to the road spectrum information on the vibration test bench.

[0083] Here, the vibration amplitude curve includes at least the vibration amplitude curve of the vehicle in the X direction, the vibration amplitude curve in the Y direction, and the vibration amplitude curve in the Z direction.

[0084] In some embodiments, after obtaining the road spectrum information, the vibration amplitude curve corresponding to the road spectrum information is entered into the control system of the vibration table, and the test vehicle is fixed on the vibration table. Force is applied to the vehicle so that the vehicle vibrates in the X, Y and Z directions according to the vibration amplitude curve.

[0085] It is worth noting that during the vibration test of the test vehicle on the vibration table, the engine friction pairs inside the test vehicle are in contact and rub against each other. As the friction force increases, the resistance between the friction pairs also increases. Under the action of resistance for a long time, the engine friction pairs are prone to wear.

[0086] Therefore, the change in starting resistance can indicate the amount of wear caused by the vibration of the engine friction pairs in the test vehicle according to the vibration amplitude curve.

[0087] It should be noted that, in order to determine the degree of wear of the engine friction pairs of the test vehicle, the resistance change value needs to be compared with a preset resistance threshold. When the resistance change value reaches the preset resistance threshold, it can be determined that the wear of the engine friction pairs of the current test vehicle is severe, and the lubrication circuit must be activated to reduce the wear of the engine friction pairs.

[0088] Here, the preset resistance threshold is arbitrarily set by the tester according to the vehicle model. The resistance threshold is different for different vehicle models, and this embodiment does not limit it.

[0089] It is understandable that, in order to determine the preset vibration threshold, it is necessary to obtain the test duration during which the change in the starting resistance of the engine in the test vehicle reaches the preset resistance threshold, and based on the test duration and the integral of the vibration amplitude curve, obtain the vibration amount of the engine friction pair cyclically vibrating with the vibration amplitude curve within the test duration; this vibration amount is the vibration threshold.

[0090] In this embodiment, road spectrum information is acquired, and based on this information, the vibration amplitude curve of the vehicle corresponding to the road spectrum information is determined. A vibration test bench is then used to apply vibration amplitude to the test vehicle, thereby reproducing the vibration conditions of the vehicle traveling on the road corresponding to the road spectrum information. The test duration for the engine's starting resistance change to reach a preset resistance threshold is then obtained to determine the test duration required for severe wear of the engine's friction pairs. Based on the test duration and the vibration amplitude curve, a preset vibration threshold is determined, thereby improving the accuracy of the vibration threshold and making engine lubrication control more precise.

[0091] Optionally, controlling the vibration amplitude of the vibration table acting on the test vehicle based on the vibration amplitude curve includes:

[0092] Obtain the first rotational resistance required for the engine to rotate at the target speed;

[0093] Using the vibration table, the test vehicle is controlled to vibrate according to the vibration amplitude curve;

[0094] Obtain the second rotational resistance required for the engine to rotate at the target speed; wherein, the second rotational resistance is: the rotational resistance of the test vehicle after vibrating the vibration amplitude curve for n cycles; where n is a positive integer greater than or equal to 1;

[0095] The test duration for obtaining the change in starting resistance of the engine in the test vehicle to reach a preset resistance threshold includes:

[0096] The change in starting resistance is determined based on the second rotational resistance and the first rotational resistance;

[0097] If the change in starting resistance reaches the resistance threshold, the duration corresponding to the n cycles is determined as the test duration.

[0098] Understandably, in order to determine the change in starting resistance, the test vehicle needs to be driven by the output of a first torque from the dynamometer during initial startup. Under the action of the first torque, the engine speed reaches the target speed. At this time, the rotational resistance of the engine is the first rotational resistance, which can be determined by the first torque.

[0099] It should be explained that a dynamometer is an instrument used to measure parameters such as force, torque, and power. It can measure parameters such as power, torque, and speed of a vehicle at different speeds and loads, and is used to evaluate power parameters and performance parameters, such as the power performance of an engine and the output power of an electric motor.

[0100] Here, the target rotational speed is arbitrarily set by the tester according to their own needs, and this embodiment does not limit it.

[0101] It should be noted that when using a vibration test bench to control the vibration of various components within the vehicle according to a vibration amplitude curve, relative forces will be generated between the components, resulting in relative friction, which can damage the friction pairs. After the friction pairs are damaged, when the engine is controlled to rotate at the target speed, a larger second torque is often required from the dynamometer to drive the test vehicle.

[0102] Therefore, in this embodiment of the present disclosure, the increment of the torque output by the dynamometer is determined based on the first torque and the second torque, and the increment of the torque corresponds to the change in the starting resistance of the test vehicle.

[0103] It is worth noting that the engine needs to be started each time the dynamometer obtains the resistance of the test vehicle. Before the test vehicle has undergone vibration testing, the engine is initially started, and the first rotational resistance is measured using the dynamometer; then the engine is turned off, and the test vehicle is controlled to vibrate according to the vibration amplitude curve using a vibration bench. After one or more vibration cycles of the test vehicle, the engine is started again, and the second rotational resistance is measured using the dynamometer.

[0104] Here, the vibration period time can be set arbitrarily by the tester according to the requirements, and this embodiment does not limit it.

[0105] Understandably, whether the change in starting resistance of the test vehicle can reach the preset resistance threshold is determined based on the vibration duration of the test vehicle. When the vibration duration of the test vehicle on the vibration test bench is short, the time for friction between the engine components is also short, resulting in less wear. The second rotational resistance measured by the dynamometer is also small, and the determined change in starting resistance is far from reaching the preset resistance threshold. Conversely, when the vibration duration of the test vehicle on the vibration test bench is long, the time for friction between the engine components is also long, resulting in more wear. The second rotational resistance measured by the dynamometer is also large, and the determined change in starting resistance is closer to the preset resistance threshold.

[0106] Therefore, in this embodiment of the present disclosure, the second rotational resistance is the rotational resistance of the test vehicle after the vibration amplitude curve has vibrated for n cycles, and it varies with the vibration cycle time.

[0107] It should be explained that when the change in starting resistance reaches the resistance threshold, the test duration is the duration corresponding to the n cycles.

[0108] It should be noted that after obtaining the test duration during which the change in the engine starting resistance inside the test vehicle reaches the preset resistance threshold, the preset vibration threshold can be determined based on the duration and the integral of the vibration curve.

[0109] For example, when initially starting the engine of the test vehicle, a dynamometer outputs a first torque to drive the test vehicle and bring the engine speed to 2000 r / min. Under these conditions, the dynamometer measures the first rotational resistance. After controlling the test vehicle's vibration for one cycle based on the vibration amplitude curve, the engine is started again, and the dynamometer outputs a second torque to drive the test vehicle and bring the engine speed to 2000 r / min. The second rotational resistance is then measured. Based on the first and second rotational resistances, the change in starting resistance is determined, and it is judged whether the change in starting resistance reaches a preset resistance threshold.

[0110] If the current change in starting resistance does not reach the preset resistance threshold, after controlling the vibration of the test vehicle for two cycles based on the vibration amplitude curve, the engine is restarted, and the test vehicle is driven by the third torque output from the dynamometer, and the engine speed is increased to 2000 r / min. Then, the second rotational resistance is measured. Based on the first rotational resistance and the second rotational resistance, the change in starting resistance is determined.

[0111] If the change in starting resistance reaches the preset resistance threshold, the duration corresponding to the two cycles is determined as the test duration.

[0112] In this embodiment, by obtaining the first rotational resistance required for the engine to rotate at the target speed, and then using a vibration test bench to control the test vehicle to vibrate according to the vibration amplitude curve, the second rotational resistance required for the engine to rotate at the target speed is obtained. Finally, based on the first and second rotational resistances, the change in starting resistance is determined. When the change in starting resistance reaches the resistance threshold, the test duration is determined. This improves the accuracy of obtaining the preset vibration threshold and enables a more accurate determination of whether the cumulative vibration of the vehicle has reached the vibration threshold, laying the foundation for improving the lubrication control of the vehicle engine.

[0113] Optionally, the method further includes:

[0114] If the change in starting resistance does not reach the resistance threshold, the test vehicle is controlled to continue vibrating according to the vibration amplitude curve, and the second rotational resistance is reacquired.

[0115] It is understandable that the second rotational resistance changes with the test cycle, and the test vehicle can be controlled to vibrate for one or more cycles according to the vibration amplitude curve; and after the vehicle vibrates for one or more cycles, the current second rotational resistance of the test vehicle is obtained, so as to determine the current change in the starting resistance of the test vehicle based on the second rotational resistance and the first rotational resistance.

[0116] If the change in starting resistance of the test vehicle does not reach the resistance threshold, the test vehicle can be controlled to continue vibrating according to the vibration amplitude curve (i.e., the vibration duration of the test vehicle is increased), and after the test vehicle vibrates for one cycle again, the second rotational resistance of the test vehicle is obtained again; to determine whether the change in starting resistance of the test vehicle reaches the resistance threshold.

[0117] If the change in starting resistance of the test vehicle has not yet reached the resistance threshold, the test vehicle is controlled to continue vibrating, and the second rotational resistance is re-determined. This process is repeated until the change in starting resistance of the test vehicle reaches the resistance threshold. Based on the cumulative number of vibration cycles of the test vehicle, the test duration of the test vehicle is determined.

[0118] In this embodiment of the present disclosure, when the change in starting resistance does not reach the resistance threshold, the test vehicle is controlled to continue vibrating according to the vibration amplitude curve, and the second rotational resistance is reacquired. This helps to ensure the accuracy of the vibration bench test and makes the evaluation of the vibration condition of the test vehicle more accurate.

[0119] Optionally, the cumulative vibration amount includes at least: the vibration amount of the vehicle in each of the three-dimensional directions;

[0120] If the cumulative vibration reaches a preset vibration threshold, the range extender in the vehicle is activated, including:

[0121] If the vibration in any direction reaches a preset vibration threshold, the range extender in the vehicle will be activated.

[0122] It should be noted that the vibration of the vehicle in the target state mainly includes vertical vibration, lateral vibration and longitudinal vibration. Therefore, the vibration of the vehicle in each of the three-dimensional directions is equivalent to the vibration in the X direction, the vibration in the Y direction and the vibration in the Z direction.

[0123] Here, the vibration amount in the X direction, the vibration amount in the Y direction, and the vibration amount in the Z direction may be equal or unequal, and this disclosure does not limit this.

[0124] Understandably, in order to reduce damage to the engine friction pairs, the range extender in the vehicle needs to be activated whenever the vibration of the vehicle in any of the three-dimensional directions reaches a preset vibration threshold, so that the range extender can deliver lubricating oil to the engine friction pairs in a timely manner.

[0125] In this embodiment of the present disclosure, if the vibration of the vehicle in any one of the three-dimensional directions reaches a preset vibration threshold, the range extender in the vehicle will be activated, so that the range extender delivers lubricating oil to the engine friction pair in a timely manner, thereby reducing the wear of the engine friction pair.

[0126] Optionally, Figure 2 This is a flowchart illustrating an engine lubrication control method according to an exemplary embodiment. Figure 2 ,like Figure 2 As shown; when the vehicle is detected to be in the target driving state, determining the cumulative vibration of the engine friction pair within the vehicle during the duration of the target driving state includes:

[0127] In step S11, the vehicle is detected to be in the target driving state, and the duration for which the vehicle maintains the target driving state is obtained;

[0128] In step S12, the vibration amplitude data of the vehicle during the duration is obtained using an acceleration sensor on the engine block.

[0129] In step S13, based on the duration and the vibration amplitude data of the vehicle within the duration, the cumulative vibration of the engine friction pair within the duration of the target driving state is determined.

[0130] Understandably, in order to determine the duration of operation when the vehicle is in pure electric driving mode, the duration for which the vehicle maintains the target driving state (i.e., the vehicle is in pure electric driving mode) is only obtained when the vehicle is detected to be in the target driving state.

[0131] It needs to be explained that the engine block is the basic part and skeleton of the engine. Its function is to support and ensure the accurate position of moving parts such as pistons, connecting rods, and crankshafts during operation; to ensure the engine's air exchange, cooling, and lubrication; and to provide various auxiliary systems.

[0132] Furthermore, the main purpose of the accelerometer is to collect vibration signals from the engine block and detect the vibration status of the engine block.

[0133] It should be noted that engine vibration is mainly manifested as vibration of the engine block, and its transmission path is: starter motor - flywheel - crankshaft - engine block. Therefore, the engine block is the location on the test bench that best reflects engine block vibration. In view of this, the embodiments of this disclosure arrange an acceleration sensor on the engine block to collect the vibration acceleration signal of the engine block and obtain the vibration of the vehicle during the stated duration.

[0134] Here, there may be one or more acceleration sensors on the engine block, and this disclosure does not limit this.

[0135] In this embodiment of the disclosure, after the acceleration sensor on the engine block acquires the vibration amplitude of the vehicle, the power domain control unit processes the vibration amplitude information to obtain the vibration amplitude data of the vehicle.

[0136] It's important to note that the Power Distribution Control Unit (PDCU) is a crucial electronic control device primarily used for the power control and management of automobiles and other mechanical equipment, such as the acquisition and processing of signals from the engine, transmission, and braking systems. Furthermore, the PDCU employs advanced microprocessor and high-precision sensor technology, enabling it to perceive the vehicle's motion status and the operational conditions of various components in real time, and to perform intelligent control and adjustments based on this data. Therefore, its application not only improves vehicle performance and reliability but also provides users with a more intelligent and convenient driving experience.

[0137] It is understandable that, after determining the duration for which the vehicle maintains the target state and the vibration amplitude data within that duration, the cumulative vibration of the engine friction pair can be determined based on the integration of the duration and the vibration amplitude data.

[0138] This embodiment of the disclosure obtains the duration for which the vehicle maintains a target driving state, and uses an acceleration sensor on the engine block to obtain vibration amplitude data of the vehicle within the duration. Finally, based on the duration and the vibration amplitude data, the cumulative vibration of the vehicle is determined, thereby improving the accuracy of obtaining the cumulative vibration of the vehicle and improving engine lubrication control.

[0139] Optionally, activating the range extender in the vehicle if the cumulative vibration reaches a preset vibration threshold includes:

[0140] If the cumulative vibration reaches a preset vibration threshold, the range extender is activated, and the range extender is controlled to operate continuously for at least a preset duration.

[0141] It should be noted that in order to reduce the wear of various components inside the engine, after starting the range extender, it is necessary to control the range extender to run for a certain period of time to ensure that the engine can deliver lubricating oil to each oil-using component connected in series in the oil circuit through an oil pump, so that each oil-using component can build up oil pressure and receive sufficient lubrication.

[0142] Here, the preset duration can be arbitrarily set by the tester according to their own needs, as long as the friction pairs of the engine can be sufficiently lubricated. This disclosed embodiment does not limit this.

[0143] In this embodiment of the present disclosure, if the cumulative vibration amount reaches a preset vibration amount threshold, the range extender is activated and the range extender is controlled to operate continuously for at least a preset time so as to establish oil pressure within the preset time, so that the friction pairs of the engine are adequately lubricated, thereby reducing the damage to the friction pairs of the engine.

[0144] Optionally, Figure 3 This is a flowchart illustrating an engine lubrication control method according to an exemplary embodiment. Figure 3 ,like Figure 3 As shown; the method further includes:

[0145] In step S3, after detecting that the range extender in the vehicle is in the activated state and the range extender has been running continuously for a preset time, the accumulated vibration amount is initialized.

[0146] It should be noted that once the vehicle's range extender is activated and has been running continuously for a preset duration, it can be determined that all oil-using components within the engine (such as friction pairs) have received sufficient lubrication. However, to improve the accuracy of engine lubrication control, after detecting that the vehicle's range extender is activated and has been running continuously for the preset duration, the accumulated vibration data needs to be initialized to re-acquire the vehicle's accumulated vibration data.

[0147] Understandably, when a vehicle's battery is low, it is often necessary to activate the range extender to provide power to the vehicle.

[0148] Therefore, the reason for starting the range extender is not limited in this embodiment. As long as the range extender is detected to be in the starting state and the starting time has reached the preset time, the PDCU power domain control unit will perform initialization processing on the acquired vibration amount.

[0149] In this embodiment of the present disclosure, after detecting that the range extender in the vehicle is in the starting state and the range extender has been running continuously for a preset time, the cumulative vibration amount is initialized. In this way, after the engine friction pairs have been fully lubricated, the current cumulative vibration amount is cleared to zero, and the cumulative vibration amount of the vehicle is reacquired, thereby improving the efficiency of engine lubrication control.

[0150] By way of example, this disclosure also provides an engine lubrication control method. Figure 4 This is a flowchart illustrating an engine lubrication control method according to an exemplary embodiment. Figure 4 ,like Figure 4 As shown; the method includes:

[0151] In step 401, the vehicle's amplitude data is identified using an acceleration sensor on the engine block.

[0152] In step 402, the amplitude data is processed using the PDCU power domain control unit to obtain the cumulative vibration of the vehicle. The cumulative vibration includes the vibration of the vehicle in the X direction, the vibration in the Y direction, and the vibration in the Z direction.

[0153] In step 403, the vibration amount in each direction is compared with the preset vibration threshold obtained on the test bench.

[0154] In step 404, determine whether to start the range extender;

[0155] In some embodiments, the range extender is activated when the vibration in each direction reaches a preset vibration threshold.

[0156] In other embodiments, the range extender does not need to be activated when the vibration in each direction does not reach a preset vibration threshold.

[0157] In step 405, it is determined whether the range extender has been running for 2 minutes when it is in the start-up state.

[0158] In step 406, it is determined whether to use the PDCU dynamic domain control unit to clear the acquired cumulative vibration amount;

[0159] In some embodiments, when it is detected that the range extender is in the start-up state and the range extender has been running for 2 minutes, the accumulated vibration amount is cleared using the PDCU power domain control unit.

[0160] In other embodiments, when the range extender is detected to be in the start-up state, but the range extender has not been running for 2 minutes, the range extender is controlled to continue running for 2 minutes.

[0161] In step 407, determine if there are any other requirements that necessitate starting the range extender;

[0162] In some embodiments, when there is a need to start the range extender, it is also necessary to control the range extender to start for 2 minutes; after the range extender has been running for 2 minutes, the acquired amplitude data is cleared using the PDCU power domain control unit.

[0163] This disclosure also provides an engine lubrication control device. Figure 5 This is a block diagram illustrating an engine lubrication control device according to an exemplary embodiment, such as... Figure 5 As shown; the device 100, applied to a hybrid vehicle, includes:

[0164] The determination module 101 is used to determine the cumulative vibration amount of the engine friction pair in the vehicle during the duration of the target driving state when the vehicle is detected to be in the target driving state, wherein the power source of the vehicle in the target driving state only includes the power battery; the cumulative vibration amount characterizes the wear condition of the engine friction pair.

[0165] The starting module 102 is used to start the range extender in the vehicle if the cumulative vibration reaches a preset vibration threshold; wherein, after the range extender is started, it is used to deliver lubricating oil to the engine friction pair.

[0166] In some embodiments, the device 100 further includes:

[0167] The acquisition module is specifically used for:

[0168] Obtain road map information;

[0169] Based on the road spectrum information, determine the vibration amplitude curve of the vehicle corresponding to the road spectrum information;

[0170] Based on the vibration amplitude curve, the vibration amplitude of the vibration table applied to the test vehicle is controlled.

[0171] The test duration for which the change in starting resistance of the engine in the test vehicle reaches a preset resistance threshold is obtained; wherein, the change in starting resistance is used to indicate the amount of wear caused by the vibration of the engine friction pair in the test vehicle according to the vibration amplitude curve;

[0172] Based on the test duration and the vibration amplitude curve, determine the vibration amount of the engine friction pair cyclically vibrating according to the vibration amplitude curve within the test duration;

[0173] The vibration amount is determined as the vibration amount threshold.

[0174] In some embodiments, the acquisition module further includes:

[0175] The first submodule is specifically used for:

[0176] Obtain the first rotational resistance required for the engine to rotate at the target speed;

[0177] Using the vibration table, the test vehicle is controlled to vibrate according to the vibration amplitude curve;

[0178] Obtain the second rotational resistance required for the engine to rotate at the target speed; wherein, the second rotational resistance is: the rotational resistance of the test vehicle after vibrating the vibration amplitude curve for n cycles; where n is a positive integer greater than or equal to 1;

[0179] The second submodule is specifically used for:

[0180] The change in starting resistance is determined based on the second rotational resistance and the first rotational resistance;

[0181] If the change in starting resistance reaches the resistance threshold, the duration corresponding to the n cycles is determined as the test duration.

[0182] In some embodiments, the second submodule is further configured to:

[0183] If the change in starting resistance does not reach the resistance threshold, the test vehicle is controlled to continue vibrating according to the vibration amplitude curve, and the second rotational resistance is reacquired.

[0184] In some embodiments, the cumulative vibration amount includes at least: the vibration amount of the vehicle in each of the three-dimensional directions;

[0185] The startup module 102 is specifically used for:

[0186] If the vibration in any direction reaches a preset vibration threshold, the range extender in the vehicle will be activated.

[0187] In some embodiments, the determining module 101 is specifically used for:

[0188] The vehicle is detected to be in the target driving state, and the duration for which the vehicle maintains the target driving state is obtained;

[0189] The vibration amplitude data of the vehicle during the duration is obtained using an acceleration sensor on the engine block.

[0190] Based on the duration and the vibration amplitude data of the vehicle within the duration, the cumulative vibration of the engine friction pair within the duration of the target driving state is determined.

[0191] In some embodiments, the startup module 102 is further configured to:

[0192] If the cumulative vibration reaches a preset vibration threshold, the range extender is activated, and the range extender is controlled to operate continuously for at least a preset duration.

[0193] In some embodiments, the device 100 further includes:

[0194] The control module is used to initialize the cumulative vibration after detecting that the range extender in the vehicle is in the start-up state and the range extender has been running continuously for a preset time.

[0195] This disclosure also provides a non-transitory computer-readable storage medium, wherein when instructions in the storage medium are executed by a processor of a network processing device, the network processing device is able to execute an engine lubrication control method, the method comprising:

[0196] When a vehicle is detected to be in a target driving state, the cumulative vibration of the engine friction pair in the vehicle is determined during the duration of the target driving state, wherein the power source of the vehicle in the target driving state consists only of the power battery; the cumulative vibration represents the wear condition of the engine friction pair.

[0197] If the cumulative vibration reaches a preset vibration threshold, the range extender in the vehicle is activated; wherein, after the range extender is activated, it is used at least to deliver lubricating oil to the engine friction pair.

[0198] The engine lubrication control method, engine lubrication control device, and storage medium described in this disclosure are only examples of the embodiments described in this disclosure, but are not limited thereto. Any engine lubrication control method and engine lubrication control device involved are within the protection scope of this disclosure.

[0199] It should be understood that the phrase "an embodiment" or "one embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this disclosure. Therefore, "in one embodiment" or "one embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It should be understood that in the various embodiments of this disclosure, the sequence numbers of the above-described processes do not imply a sequential order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this disclosure. The sequence numbers of the above-described embodiments are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0200] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0201] The above description is merely an embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. An engine lubrication control method, characterized in that, Applied to hybrid vehicles, the method includes: When a vehicle is detected to be in a target driving state, the cumulative vibration of the engine friction pair in the vehicle is determined during the duration of the target driving state, wherein the power source of the vehicle in the target driving state consists only of the power battery; the cumulative vibration represents the wear condition of the engine friction pair. If the cumulative vibration reaches a preset vibration threshold, the range extender in the vehicle is activated; wherein, after activation, the range extender is used at least to deliver lubricating oil to the engine friction pairs; Obtaining the preset vibration threshold includes: acquiring road spectrum information; determining the vibration amplitude curve of the vehicle corresponding to the road spectrum information based on the road spectrum information; controlling the vibration amplitude of the vibration test bench acting on the test vehicle based on the vibration amplitude curve; acquiring the test duration during which the change in starting resistance of the engine in the test vehicle reaches the preset resistance threshold; wherein the change in starting resistance is used to indicate the amount of wear caused by the engine friction pair in the test vehicle vibrating according to the vibration amplitude curve; determining the vibration amount of the engine friction pair cyclically vibrating according to the vibration amplitude curve within the test duration based on the test duration and the vibration amplitude curve; and determining the vibration amount as the vibration threshold.

2. The method according to claim 1, characterized in that, The control of the vibration amplitude of the vibration table acting on the test vehicle based on the vibration amplitude curve includes: Obtain the first rotational resistance required for the engine to rotate at the target speed; Using the vibration table, the test vehicle is controlled to vibrate according to the vibration amplitude curve; Obtain the second rotational resistance required for the engine to rotate at the target speed; wherein, the second rotational resistance is: the rotational resistance of the test vehicle after vibrating the vibration amplitude curve for n cycles; where n is a positive integer greater than or equal to 1; The test duration for obtaining the change in starting resistance of the engine in the test vehicle to reach a preset resistance threshold includes: The change in starting resistance is determined based on the second rotational resistance and the first rotational resistance; If the change in starting resistance reaches the resistance threshold, the duration corresponding to the n cycles is determined as the test duration.

3. The method according to claim 2, characterized in that, The method further includes: If the change in starting resistance does not reach the resistance threshold, the test vehicle is controlled to continue vibrating according to the vibration amplitude curve, and the second rotational resistance is reacquired.

4. The method according to claim 1, characterized in that, The cumulative vibration amount includes at least the vibration amount of the vehicle in each of the three-dimensional directions; If the cumulative vibration reaches a preset vibration threshold, the range extender in the vehicle is activated, including: If the vibration in any direction reaches a preset vibration threshold, the range extender in the vehicle will be activated.

5. The method according to claim 1, characterized in that, When the vehicle is detected to be in a target driving state, determining the cumulative vibration of the engine friction pair within the vehicle during the duration of the target driving state includes: The vehicle is detected to be in the target driving state, and the duration for which the vehicle maintains the target driving state is obtained; The vibration amplitude data of the vehicle during the duration is obtained using an acceleration sensor on the engine block. Based on the duration and the vibration amplitude data of the vehicle within the duration, the cumulative vibration of the engine friction pair within the duration of the target driving state is determined.

6. The method according to claim 1, characterized in that, If the cumulative vibration reaches a preset vibration threshold, the range extender in the vehicle is activated, including: If the cumulative vibration reaches a preset vibration threshold, the range extender is activated, and the range extender is controlled to operate continuously for at least a preset duration.

7. The method according to claim 1 or 6, characterized in that, The method further includes: After detecting that the range extender in the vehicle is in the activated state and has been running continuously for a preset time, the accumulated vibration amount is initialized.

8. An engine lubrication control device, characterized in that, The device, applied to hybrid vehicles, includes: The determination module is used to determine the cumulative vibration of the engine friction pair within the vehicle during the duration of the target driving state when the vehicle is detected to be in the target driving state, wherein the power source of the vehicle in the target driving state only includes the power battery; the cumulative vibration represents the wear condition of the engine friction pair. A starting module is used to activate the range extender in the vehicle if the cumulative vibration reaches a preset vibration threshold; wherein, after the range extender is activated, it is used at least to deliver lubricating oil to the engine friction pairs; An acquisition module is used to acquire road spectrum information; determine the vibration amplitude curve of the vehicle corresponding to the road spectrum information based on the road spectrum information; control the vibration amplitude of the test vehicle applied by the vibration bench based on the vibration amplitude curve; acquire the test duration during which the change in starting resistance of the engine in the test vehicle reaches a preset resistance threshold; wherein the change in starting resistance is used to indicate the amount of wear caused by the engine friction pair in the test vehicle vibrating according to the vibration amplitude curve; determine the vibration amount of the engine friction pair cyclically vibrating according to the vibration amplitude curve within the test duration based on the test duration and the vibration amplitude curve; and determine the vibration amount as the vibration amount threshold.

9. A computer-readable storage medium, characterized in that, The computer program is used to store a computer program, the computer program including instructions for implementing the method as described in any one of claims 1 to 7.

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