Commutator cleaning method, device, storage medium, and vehicle

Abstract

The application provides a commutator cleaning method, device, storage medium and vehicle, and the method comprises the following steps: obtaining a target toner amount allowed by the commutator and an actual toner amount of the commutator; determining a rotation strategy of the motor according to a comparison result between the target toner amount allowed by the commutator and the actual toner amount of the commutator and based on vehicle state information; and controlling the motor to rotate according to the rotation strategy of the motor through an electronic control unit, so that the commutator rotates and the toner of the actual toner amount is thrown out. The motor is controlled to rotate according to the rotation strategy of the motor through the electronic control unit, so that the toner on the commutator can be effectively thrown out, the mixture of the toner is prevented from adhering to the commutator slot and causing the current of the commutator to abnormally increase, and further, the failure rate of the intelligent torque manager can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a commutator cleaning method and device, a storage medium and a vehicle. BACKGROUND

[0002] With the rapid development of the automobile industry, intelligent torque managers are widely used in vehicles because they can realize flexible switching between two-wheel drive and four-wheel drive under different road conditions.

[0003] However, the vehicle equipped with the intelligent torque manager is in a working state during driving, and foreign matter in the oil or the oil pump will enter the sealing ring of the oil pump, causing sealing failure of the sealing ring, and then the oil will enter the interior of the motor. Moreover, the carbon powder and copper powder will inevitably fall off from the brush and commutator in the motor with use, and when the carbon powder and copper powder come into contact with the oil, the adhesion of the carbon powder and copper powder will greatly increase, causing the powder mixture to adhere to the groove of the commutator. As the adhesion increases, the groove of the commutator is gradually conductive, causing the internal resistance of the commutator to decrease and the current of the commutator to abnormally increase, and eventually causing the intelligent torque manager to fail. Therefore, in order to avoid the failure of the intelligent torque manager, it is particularly important to clean the carbon powder in the commutator. SUMMARY

[0004] Therefore, the present application aims to provide a commutator cleaning method and device, a storage medium and a vehicle, which can control the motor to rotate according to the rotation strategy of the motor to make the commutator rotate and throw out the actual amount of carbon powder, thereby cleaning the carbon powder in the commutator in time and avoiding the failure of the intelligent torque manager.

[0005] According to a first aspect of the present application, a commutator cleaning method is provided, applied to an intelligent torque manager, the intelligent torque manager comprising an electronic control unit and a motor, the motor comprising a commutator, the method comprising:

[0006] obtaining a target carbon powder amount allowed by the commutator and an actual carbon powder amount of the commutator;

[0007] determining a rotation strategy of the motor according to a comparison result between the target carbon powder amount allowed by the commutator and the actual carbon powder amount of the commutator, and based on vehicle state information;

[0008] controlling the motor to rotate according to the rotation strategy of the motor by the electronic control unit, so as to make the commutator rotate and throw out the actual amount of carbon powder.

[0009] Optionally, the obtaining of the target carbon powder amount allowed by the commutator comprises:

[0010] The step of determining whether the current of the commutator is abnormal is repeated until the current of the commutator is abnormal, the amount of carbon powder in the commutator is obtained, and the amount of carbon powder in the commutator is taken as a target amount of carbon powder allowed by the commutator.

[0011] Optionally, the motor includes a brush.

[0012] The actual amount of carbon powder in the commutator is obtained by:

[0013] The rated rotating speed of the motor is obtained.

[0014] The motor is controlled to rotate at the rated rotating speed by the electronic control unit.

[0015] When the motor is in a rotating state, the amount of carbon powder generated by the friction between the brush and the commutator per unit time is obtained, and the amount of carbon powder generated by the friction between the brush and the commutator per unit time is taken as the actual amount of carbon powder generated per unit time.

[0016] The actual amount of carbon powder in the commutator is determined according to the interval time of the commutator cleaning method, the actual amount of carbon powder generated per unit time, and a preset time interval period, wherein the interval time of the commutator cleaning method is determined according to the current time and the time when the commutator cleaning method was last executed.

[0017] Optionally, the comparison result between the target amount of carbon powder allowed by the commutator and the actual amount of carbon powder in the commutator, and the determination of the rotating strategy of the motor based on vehicle state information include:

[0018] Vehicle state information is obtained, wherein the vehicle state information includes vehicle shutdown time, vehicle remaining power, and vehicle motion state.

[0019] A first carbon powder threshold is determined according to the target amount of carbon powder allowed by the commutator and a preset first numerical value.

[0020] If the actual amount of carbon powder in the commutator is greater than or equal to 0 and less than the first carbon powder threshold, it is determined whether the vehicle shutdown time is greater than or equal to a preset first time value, the vehicle remaining power is greater than or equal to a preset remaining power threshold, and the vehicle motion state is a stationary state.

[0021] If the vehicle shutdown time is greater than or equal to the first time value, the vehicle remaining power is greater than or equal to the remaining power threshold, and the vehicle motion state is the stationary state, the minimum rotating time of the motor is determined according to the target amount of carbon powder allowed by the commutator and the maximum rotating speed of the motor.

[0022] acquiring a maximum rotation speed of the motor in advance as a target rotation speed of the motor;

[0023] acquiring a minimum rotation time of the motor as a target rotation time of the motor;

[0024] if the vehicle off time is less than the first time value, or the vehicle remaining power is less than the remaining power threshold, or the vehicle motion state is the non-stationary state, then the interval time of the cleaning method of the commutator is accumulated.

[0025] Optionally, the comparison result between the target toner amount allowed by the commutator and the actual toner amount of the commutator, and determining the rotation strategy of the motor based on vehicle state information, comprises:

[0026] determining a second toner amount threshold according to the target toner amount allowed by the commutator and a preset second value, wherein the second value is greater than the first value;

[0027] if the actual toner amount of the commutator is greater than or equal to the first toner amount threshold and less than the second toner amount threshold, then determining whether the vehicle off time is greater than or equal to the first time value, the vehicle remaining power is greater than or equal to the remaining power threshold, and the vehicle motion state is the stationary state;

[0028] if the vehicle off time is greater than or equal to the first time value, the vehicle remaining power is greater than or equal to the remaining power threshold, and the vehicle motion state is the stationary state, then determining the target rotation time of the motor according to the minimum rotation time of the motor, the interval time of the cleaning method of the commutator, and the time interval period;

[0029] acquiring a maximum rotation speed of the motor in advance as a target rotation speed of the motor;

[0030] if the vehicle off time is less than the first time value, or the vehicle remaining power is less than the remaining power threshold, or the vehicle motion state is the non-stationary state, then the interval time of the cleaning method of the commutator is accumulated, and in the process of accumulating the interval time of the cleaning method of the commutator, the first prompt information is sent to the instrument of the vehicle synchronously and displayed for a preset first prompt time.

[0031] Optionally, the comparison result between the target toner amount allowed by the commutator and the actual toner amount of the commutator, and determining the rotation strategy of the motor based on vehicle state information, comprises:

[0032] determining a third toner amount threshold according to the target toner amount allowed by the commutator and a preset third numerical value, wherein the third numerical value is greater than the second numerical value;

[0033] if the actual toner amount of the commutator is greater than or equal to the second toner amount threshold and less than the third toner amount threshold, determining whether the vehicle off time is greater than or equal to a preset second time numerical value, whether the remaining power of the vehicle is greater than or equal to the remaining power threshold, and whether the vehicle motion state is the static state, wherein the second time numerical value is less than the first time numerical value;

[0034] if the vehicle off time is greater than or equal to the second time numerical value, the remaining power of the vehicle is greater than or equal to the remaining power threshold, and the vehicle motion state is the static state, determining the target rotation time of the motor according to the minimum rotation time of the motor, the interval time of the commutator cleaning method, and the time interval period;

[0035] taking the maximum rotation speed of the motor as the target rotation speed of the motor;

[0036] if the vehicle off time is less than the second time numerical value, or the remaining power of the vehicle is less than the remaining power threshold, or the vehicle motion state is the non-static state, accumulating the interval time of the commutator cleaning method, and synchronously sending second prompt information to the instrument and maintaining the display of a preset second prompt time during the accumulation of the interval time of the commutator cleaning method, wherein the second prompt time is greater than the first prompt time.

[0037] Optionally, the determination of the rotation strategy of the motor according to the comparison result between the target toner amount allowed by the commutator and the actual toner amount of the commutator, and the vehicle state information comprises:

[0038] if the actual toner amount of the commutator is greater than or equal to the third toner amount threshold, determining whether the vehicle motion state is the static state or the straight-ahead state;

[0039] if the vehicle motion state is the static state or the straight-ahead state, determining the target rotation time of the motor according to the minimum rotation time of the motor, the interval time of the commutator cleaning method, and the time interval period;

[0040] taking the maximum rotation speed of the motor as the target rotation speed of the motor;

[0041] If the vehicle motion state is the non-stationary state or the non-straight state, the commutator cleaning method is stopped until the vehicle motion state is the stationary state or the straight state, and the commutator cleaning method is continued, and third prompt information is synchronously sent to the instrument until the commutator cleaning method is completed.

[0042] According to a second aspect of the present application, a commutator cleaning device is provided, which comprises:

[0043] A data acquisition module is configured to acquire a target toner amount allowed by the commutator and an actual toner amount of the commutator.

[0044] A motor rotation strategy determination module is configured to determine a rotation strategy of the motor according to a comparison result between the target toner amount allowed by the commutator and the actual toner amount of the commutator, and based on vehicle state information.

[0045] A commutator cleaning module is configured to control the motor to rotate by the electronic control unit according to the rotation strategy of the motor, so that the commutator rotates and the actual toner amount of the toner is thrown out.

[0046] Optionally, the data acquisition module comprises:

[0047] A target toner amount allowed by the commutator acquisition sub-module is configured to repeatedly perform the steps of increasing the toner amount in the commutator, acquiring the current of the commutator, and determining whether the current of the commutator is abnormal until the current of the commutator is abnormal, acquiring the toner amount in the commutator, and taking the toner amount in the commutator as the target toner amount allowed by the commutator.

[0048] Optionally, the data acquisition module comprises:

[0049] A motor rated rotation speed acquisition sub-module is configured to acquire a rated rotation speed of the motor.

[0050] A motor control sub-module is configured to control the motor to rotate by the electronic control unit according to the rated rotation speed.

[0051] A toner amount per unit time acquisition sub-module is configured to acquire a toner amount per unit time generated by friction between the brush and the commutator when the motor is in a rotating state, and take the toner amount per unit time generated by friction between the brush and the commutator as an actual toner amount per unit time.

[0052] The actual carbon powder amount determination submodule is configured to determine the actual carbon powder amount of the commutator according to an interval time of executing the commutator cleaning method, an actual carbon powder amount generated in the unit time, and a preset time interval period, wherein the interval time of executing the commutator cleaning method is determined according to a current time and a time of last executing the commutator cleaning method.

[0053] Optionally, the motor rotation strategy determination module comprises:

[0054] The vehicle state information acquisition submodule is configured to acquire vehicle state information, wherein the vehicle state information comprises a vehicle off time, a vehicle residual power, and a vehicle motion state.

[0055] The first carbon powder amount threshold determination submodule is configured to determine a first carbon powder amount threshold according to the target carbon powder amount allowed by the commutator and a preset first numerical value.

[0056] The first vehicle state judgment submodule is configured to, if the actual carbon powder amount of the commutator is greater than or equal to 0 and less than the first carbon powder amount threshold, judge whether the vehicle off time is greater than or equal to a preset first time numerical value, whether the vehicle residual power is greater than or equal to a preset residual power threshold, and whether the vehicle motion state is a stationary state.

[0057] The motor minimum rotation time determination submodule is configured to, if the vehicle off time is greater than or equal to the first time numerical value, the vehicle residual power is greater than or equal to the residual power threshold, and the vehicle motion state is the stationary state, determine a minimum rotation time of the motor according to the target carbon powder amount allowed by the commutator and a maximum rotation speed of the motor.

[0058] The first motor target rotation speed determination submodule is configured to take a maximum rotation speed of the motor acquired in advance as a target rotation speed of the motor.

[0059] The first motor target rotation time determination submodule is configured to take the minimum rotation time of the motor as a target rotation time of the motor.

[0060] The first interval time accumulation module is configured to, if the vehicle off time is less than the first time numerical value, or the vehicle residual power is less than the residual power threshold, or the vehicle motion state is a non-stationary state, accumulate the interval time of executing the commutator cleaning method.

[0061] Optionally, the motor rotation strategy determination module comprises:

[0062] a second carbon powder amount threshold value determining sub-module, configured to determine a second carbon powder amount threshold value according to the target carbon powder amount allowed by the commutator and a preset second value, wherein the second value is greater than the first value;

[0063] a second vehicle state judging sub-module, configured to judge whether the vehicle off time is greater than or equal to the first time value, whether the vehicle residual power is greater than or equal to the residual power threshold value and whether the vehicle motion state is the static state if the actual carbon powder amount of the commutator is greater than or equal to the first carbon powder amount threshold value and less than the second carbon powder amount threshold value;

[0064] a second motor target rotation time determining sub-module, configured to determine a target rotation time of the motor according to the minimum rotation time of the motor, the interval time of the commutator cleaning method and the time interval period if the vehicle off time is greater than or equal to the first time value, the vehicle residual power is greater than or equal to the residual power threshold value and the vehicle motion state is the static state;

[0065] a second motor target rotation speed determining sub-module, configured to take the maximum rotation speed of the motor as the target rotation speed of the motor;

[0066] a first instrument prompting sub-module, configured to accumulate the interval time of the commutator cleaning method, synchronously send first prompt information to the instrument of the vehicle and keep displaying a preset first prompt time in the process of accumulating the interval time of the commutator cleaning method if the vehicle off time is less than the first time value, or the vehicle residual power is less than the residual power threshold value, or the vehicle motion state is the non-static state.

[0067] Optionally, the motor rotation strategy determining module comprises:

[0068] a third carbon powder amount threshold value determining sub-module, configured to determine a third carbon powder amount threshold value according to the target carbon powder amount allowed by the commutator and a preset third value, wherein the third value is greater than the second value;

[0069] a third vehicle state judging sub-module, configured to judge whether the vehicle off time is greater than or equal to a preset second time value, whether the vehicle residual power is greater than or equal to the residual power threshold value and whether the vehicle motion state is the static state if the actual carbon powder amount of the commutator is greater than or equal to the second carbon powder amount threshold value and less than the third carbon powder amount threshold value, wherein the second time value is less than the first time value;

[0070] a third motor target rotating time determination submodule, configured to determine a target rotating time of the motor according to a minimum rotating time of the motor, an interval time at which the commutator cleaning method is executed, and a time interval period, if the vehicle off time is greater than or equal to the second time value, the vehicle residual power is greater than or equal to the residual power threshold, and the vehicle motion state is the static state;

[0071] a third motor target rotating speed determination submodule, configured to determine a maximum rotating speed of the motor as a target rotating speed of the motor;

[0072] a second instrument prompting submodule, configured to accumulate the interval time at which the commutator cleaning method is executed, and synchronously send second prompt information to the instrument and keep displaying a preset second prompt time during the accumulation of the interval time at which the commutator cleaning method is executed, if the vehicle off time is less than the second time value, or the vehicle residual power is less than the residual power threshold, or the vehicle motion state is the non-static state, wherein the second prompt time is greater than the first prompt time.

[0073] Optionally, the motor rotating strategy determination module comprises:

[0074] a fourth vehicle state determination submodule, configured to determine whether the vehicle motion state is the static state or the straight driving state, if the actual carbon powder amount of the commutator is greater than or equal to the third carbon powder threshold;

[0075] a fourth motor target rotating time determination submodule, configured to determine a target rotating time of the motor according to a minimum rotating time of the motor, an interval time at which the commutator cleaning method is executed, and a time interval period, if the vehicle motion state is the static state or the straight driving state;

[0076] a fourth motor target rotating speed determination submodule, configured to determine a maximum rotating speed of the motor as a target rotating speed of the motor;

[0077] a third instrument prompting submodule, configured to stop executing the commutator cleaning method if the vehicle motion state is the non-static state or the non-straight driving state, continue to execute the commutator cleaning method until the vehicle motion state is the static state or the straight driving state, and synchronously send third prompt information to the instrument until the commutator cleaning method is executed completely during the execution of the commutator cleaning method.

[0078] According to a third aspect of the present application, there is provided a storage medium having stored thereon a computer program which, when executed by a processor, implements the commutator cleaning method steps of any of the first aspect.

[0079] According to a fourth aspect of the present application, there is provided a vehicle comprising the commutator cleaning device of the second aspect of the present application.

[0080] The commutator cleaning method provided by the embodiments of the present application is applied to an intelligent torque manager, the intelligent torque manager comprising an electronic control unit and a motor, the motor comprising a commutator. The target carbon powder amount allowed by the commutator and the actual carbon powder amount of the commutator are obtained. The rotation strategy of the motor is determined according to the comparison result between the target carbon powder amount allowed by the commutator and the actual carbon powder amount of the commutator, and based on vehicle state information. The motor is controlled to rotate by the electronic control unit according to the rotation strategy of the motor, so that the commutator rotates and the carbon powder of the actual carbon powder amount is thrown out. The motor is controlled to rotate by the electronic control unit according to the rotation strategy of the motor, so that the carbon powder on the commutator can be effectively thrown out, and the problems such as that the carbon powder mixture is attached in the slot of the commutator, the slot of the commutator is gradually conducted, the internal resistance of the commutator becomes smaller, and the current of the commutator abnormally increases are avoided. Further, the failure rate of the intelligent torque manager can be reduced, and the reliability and safety of the vehicle are improved. In addition, the actual carbon powder amount of the commutator is obtained in real time, and compared with the target carbon powder amount allowed by the commutator, so that the situation that the carbon powder in the commutator accumulates too much can be found in time.

[0081] The above description is only a summary of the technical solutions of the present application. In order to enable one skilled in the art to better understand the technical means of the present application, the content of the specification can be implemented, and in order to enable the above and other purposes, characteristics and advantages of the present application to be more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0082] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are intended to further assist in understanding the preferred embodiments and are not considered limiting of the present application. Moreover, like reference numerals denote like parts throughout the several views in the drawings. In the drawings:

[0083] Figure 1 is one of the step flowcharts of the commutator cleaning method provided by the embodiments of the present application;

[0084] Figure 2 is another step flowchart of the commutator cleaning method provided by the embodiments of the present application;

[0085] Figure 3Figure 3 is a step flow chart of a commutator cleaning method according to an embodiment of the present application;

[0086] Figure 4 Figure 4 is a step flow chart of a commutator cleaning method according to an embodiment of the present application;

[0087] Figure 5 Figure 5 is a step flow chart of a commutator cleaning method according to an embodiment of the present application;

[0088] Figure 6 Figure 6 is a step flow chart of a commutator cleaning method according to an embodiment of the present application;

[0089] Figure 7 Figure 7 is a device block diagram of a commutator cleaning device according to an embodiment of the present application. DETAILED DESCRIPTION

[0090] Exemplary embodiments of the present application will be described herein below with reference to the accompanying drawings. While exemplary embodiments of the present application are illustrated, it should be understood that the present application can be embodied in many forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.

[0091] The terms "first", "second", and the like in the description and claims of the present application are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the use of these terms herein is merely for distinguishing between the objects and does not necessarily indicate a particular order or chronology between the objects. Unless otherwise defined, all terms used in disclosing the application, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an overly literal or overly formal sense unless expressly so defined herein.

[0092] The commutator cleaning method, device, storage medium, and vehicle according to the embodiments of the present application will be described in detail below with reference to the accompanying drawings and specific embodiments and application scenarios.

[0093] Referring to Figure 1 , Figure 1 A step flow chart of a commutator cleaning method according to an embodiment of the present application is provided, and the commutator cleaning method includes the following steps:

[0094] In step 101, the target toner amount allowed by the commutator and the actual toner amount of the commutator are obtained.

[0095] Step 102, according to the comparison result between the target carbon powder amount allowed by the commutator and the actual carbon powder amount of the commutator, and based on the vehicle state information, determine the rotation strategy of the motor.

[0096] Step 103, control the motor to rotate by the electronic control unit according to the rotation strategy of the motor, so that the commutator rotates and the actual carbon powder amount of carbon powder is thrown out.

[0097] It should be noted that in the embodiment of the present application, the intelligent torque manager includes an electronic control unit and a motor, wherein the motor includes a commutator.

[0098] The maximum carbon powder amount allowed in the commutator is the target carbon powder amount allowed by the commutator, and the actual carbon powder amount existing in the commutator is the actual carbon powder amount of the commutator. The rotation strategy of the motor includes the target rotation speed of the motor and the target rotation time of the motor.

[0099] In order to determine the rotation strategy of the motor, it is necessary to obtain the target carbon powder amount allowed by the commutator and the actual carbon powder amount of the commutator in advance. After obtaining the target carbon powder amount allowed by the commutator and the actual carbon powder amount of the commutator, compare the target carbon powder amount allowed by the commutator with the actual carbon powder amount of the commutator to obtain the comparison result between them. According to the comparison result between the target carbon powder amount allowed by the commutator and the actual carbon powder amount of the commutator, and based on the vehicle state information, determine the rotation strategy of the motor.

[0100] After determining the rotation strategy of the motor, control the motor to rotate by the electronic control unit according to the rotation strategy of the motor. Since the motor includes a commutator, after the motor rotates, the commutator in the motor will also rotate, and then the carbon powder attached to the surface of the commutator can be thrown out by the centrifugal force generated by the high-speed rotation, to the outside or edge of the commutator, which can limit the carbon powder from falling into the groove of the commutator in a large range. At the same time, the rapid rotation of the motor will also form a certain degree of air directional flow in the closed space inside the motor, the flow direction is consistent with the rotation direction of the motor, that is, it blows along the circumferential direction of the motor axis, so that a small amount of residual carbon powder in the commutator groove is also blown away, thereby ensuring that there is no residual carbon powder in the commutator groove or the amount of carbon powder in the commutator groove is maintained within a very small range, which will not cause the resistance of the commutator to decrease and the current of the commutator to abnormally increase.

[0101] The application can effectively throw out the carbon powder on the commutator, avoid the carbon powder mixture from adhering to the commutator slot, cause the slot of the commutator to gradually conduct, the internal resistance of the commutator to become small, and the current of the commutator to abnormally increase, and the like, by the electronic control unit controlling the rotation of the motor according to the rotation strategy of the motor, further, can reduce the failure rate of the intelligent torque manager, and improve the reliability and safety of the vehicle. In addition, by real-time acquisition of the actual carbon powder amount of the commutator, and comparison with the target carbon powder amount allowed by the commutator, the application can timely find the situation that the carbon powder in the commutator accumulates too much.

[0102] Further, in the embodiment of the application, step 101 can further include the following steps:

[0103] The steps of increasing the carbon powder amount in the commutator, acquiring the current of the commutator, and judging whether the current of the commutator is abnormal are repeatedly performed until the current of the commutator is abnormal, the carbon powder amount in the commutator is acquired, and the carbon powder amount in the commutator is taken as the target carbon powder amount allowed by the commutator.

[0104] It should be noted that, in the embodiment of the application, the specific implementation process of acquiring the target carbon powder amount allowed by the commutator is as follows: a solid bench is selected to ensure that it can withstand the weight of the motor and the vibration during operation; necessary sensors and data acquisition equipment should be installed on the bench to monitor the running state of the motor in real time. The motor is firmly installed on the bench using appropriate fixing devices (such as bolts, clamps, etc.); the axis of the motor is aligned with the axis of the bench to reduce test errors. After the motor is installed on the bench, carbon powder is first added to the slot of the commutator, the motor is started and runs for a period of time, and the current of the commutator is tested. A certain amount of carbon powder is added each time, and the above test process is repeated, and the current of the commutator after each increase of carbon powder is recorded. By analyzing the current of the commutator after each increase of carbon powder, the current of the commutator under different carbon powder amounts is observed, and the critical point of abnormal increase of the current of the commutator is found, that is, the current of the commutator is abnormal. The carbon powder amount in the commutator at this time is acquired, and the carbon powder amount in the commutator at this time is the target carbon powder amount allowed by the commutator.

[0105] The application can accurately determine the critical point of abnormal increase of the current of the commutator by gradually increasing the carbon powder amount in the commutator and real-time monitoring the current change of the commutator, thereby determining the target carbon powder amount allowed by the commutator, further, can clean in time when the carbon powder amount in the commutator approaches the target carbon powder amount, avoid the carbon powder accumulation too much to cause the current of the commutator to abnormally increase, thereby improving the cleaning efficiency of the commutator.

[0106] Further, in the embodiment of the application, as shown in Figure 2 step 101 can further include the following steps:

[0107] Step 201, acquiring the rated rotation speed of the motor.

[0108] Step 202, controlling the motor to rotate by the electronic control unit according to the rated rotating speed.

[0109] Step 203, obtaining the amount of carbon powder generated by the friction between the brush and the commutator in unit time when the motor is in the rotating state, and taking the amount of carbon powder generated by the friction between the brush and the commutator in unit time as the actual amount of carbon powder generated in unit time.

[0110] Step 204, determining the actual amount of carbon powder of the commutator according to the interval time of the execution of the commutator cleaning method, the actual amount of carbon powder generated in unit time, and the preset time interval period, wherein the interval time of the execution of the commutator cleaning method is determined according to the current time and the time of the last execution of the commutator cleaning method.

[0111] It should be noted that in the embodiment of the application, the motor further comprises a brush.

[0112] The specific implementation process of obtaining the interval time of the execution of the commutator cleaning method is to obtain the current time and the time of the last execution of the commutator cleaning method in advance. The interval time of the execution of the commutator cleaning method = current time - time of the last execution of the commutator cleaning method.

[0113] The specific implementation process of obtaining the actual amount of carbon powder generated in unit time is to obtain the rated rotating speed of the motor. The motor is controlled to rotate by the electronic control unit according to the rated rotating speed. When the motor is in the rotating state, the amount of carbon powder generated by the friction between the brush and the commutator in unit time is obtained, and the amount of carbon powder generated by the friction between the brush and the commutator in unit time is taken as the actual amount of carbon powder generated in unit time.

[0114] The preset time interval period is preferably 2 months (60 days), and the specific value of the preset time interval period can be adjusted later with the optimization of the scheme.

[0115] After obtaining the interval time of the execution of the commutator cleaning method, the interval time of the execution of the commutator cleaning method is compared with the preset time interval period to determine whether the interval time of the execution of the commutator cleaning method is greater than the preset time interval period. If the interval time of the execution of the commutator cleaning method is greater than the preset time interval period, the preset time interval period, the actual amount of carbon powder generated in unit time, and the interval time of the execution of the commutator cleaning method are substituted into formula (1), and the actual amount of carbon powder of the commutator can be obtained.

[0116] Σ4 = t * Σ1 * [1 + (K1-t) / t] Formula (1)

[0117] Wherein, Σ4 is the actual carbon powder amount of the commutator, t is the preset time interval period, Σ1 is the actual generated carbon powder amount per unit time, and K1 is the interval time of the commutator cleaning method.

[0118] If the interval time of the commutator cleaning method is less than or equal to the preset time interval period, the commutator cleaning method is not executed.

[0119] The present application determines the actual carbon powder amount of the commutator according to the interval time of the commutator cleaning method, the actual generated carbon powder amount per unit time, and the preset time interval period, thereby accurately calculating the actual carbon powder amount of the commutator, cleaning the commutator in time when the carbon powder amount of the commutator approaches the target carbon powder amount, avoiding excessive accumulation of carbon powder to cause abnormal increase of the commutator current, and improving the cleaning efficiency of the commutator.

[0120] Further, in the embodiment of the present application, as shown in Figure 3 Step 102 can further include the following steps:

[0121] Step 301: acquiring vehicle state information, wherein the vehicle state information includes vehicle off time, vehicle remaining power, and vehicle motion state.

[0122] Step 302: determining a first carbon powder amount threshold according to the target carbon powder amount allowed by the commutator and a preset first value.

[0123] Step 303: if the actual carbon powder amount of the commutator is greater than or equal to 0 and less than the first carbon powder amount threshold, determining whether the vehicle off time is greater than or equal to a preset first time value, the vehicle remaining power is greater than or equal to a preset remaining power threshold, and the vehicle motion state is a stationary state.

[0124] It should be noted that in the embodiment of the present application, the vehicle state information is acquired in advance, wherein the vehicle state information includes vehicle off time, vehicle remaining power, and vehicle motion state.

[0125] The preset first value can be 65%, and the specific value of the first value can be adjusted subsequently along with optimization of the scheme. After the first value is determined, the first carbon powder amount threshold = target carbon powder amount allowed by the commutator * preset first value.

[0126] The actual carbon powder amount of the commutator is compared with the first carbon powder amount threshold. If the actual carbon powder amount of the commutator is greater than or equal to 0 and less than the first carbon powder amount threshold, it is determined whether the vehicle engine-off time is greater than or equal to a preset first time value, whether the remaining power of the vehicle is greater than or equal to a preset remaining power threshold, and whether the motion state of the vehicle is a static state. The preset first time value is preferably 8h, and the preset remaining power threshold is preferably 75%. The specific values of the first time value and the remaining power threshold can be adjusted later as the scheme is optimized.

[0127] In step 304, if the vehicle engine-off time is greater than or equal to the first time value, the remaining power of the vehicle is greater than or equal to the remaining power threshold, and the motion state of the vehicle is a static state, the minimum rotation time of the motor is determined according to the target carbon powder amount allowed by the commutator and the maximum rotation speed of the motor.

[0128] In step 305, the maximum rotation speed of the motor obtained in advance is taken as the target rotation speed of the motor.

[0129] In step 306, the minimum rotation time of the motor is taken as the target rotation time of the motor.

[0130] It should be noted that in the embodiment of the present application, if the vehicle engine-off time is greater than or equal to the first time value, the remaining power of the vehicle is greater than or equal to the remaining power threshold, and the motion state of the vehicle is a static state, the minimum rotation time of the motor is determined according to the target carbon powder amount allowed by the commutator and the maximum rotation speed of the motor. Specifically, the minimum rotation time of the motor = the target carbon powder amount allowed by the commutator / the maximum rotation speed of the motor.

[0131] Preferably, the rotation strategy of the motor is that the target rotation speed of the motor is the maximum rotation speed of the motor obtained in advance, and the target rotation time of the motor is the minimum rotation time of the motor.

[0132] In addition, the target rotation speed of the motor can also be determined according to a preset value and the maximum rotation speed of the motor. Specifically, the target rotation speed of the motor = the preset value * the maximum rotation speed of the motor. After the target rotation speed of the motor is determined, the target rotation time of the motor is determined according to the target carbon powder amount allowed by the commutator and the target rotation speed of the motor. Specifically, the target rotation time of the motor = the target carbon powder amount allowed by the commutator / (the preset value * the maximum rotation speed of the motor). For example, if the preset value is 75%, the target rotation speed of the motor is 75% * the maximum rotation speed of the motor, and the target rotation time of the motor is the target carbon powder amount allowed by the commutator / (75% * the maximum rotation speed of the motor).

[0133] Further, after the motor is controlled to complete rotation by the electronic control unit according to the target rotation speed of the motor and the target rotation time of the motor, the interval time at which the commutator cleaning method is executed is set to 1.

[0134] In step 307, if the vehicle off time is less than the first time value, or the vehicle remaining power is less than the remaining power threshold, or the vehicle motion state is a non-stationary state, the interval time at which the commutator cleaning method is executed is accumulated.

[0135] It should be noted that in the embodiment of the present application, if the vehicle off time is less than the first time value, or the vehicle remaining power is less than the remaining power threshold, or the vehicle motion state is a non-stationary state, the execution of the commutator cleaning method is stopped, and the interval time at which the commutator cleaning method is executed is accumulated on the basis of the current interval time at which the commutator cleaning method is executed.

[0136] The present application can effectively throw off the carbon powder on the commutator, avoid the intelligent torque manager failure caused by the carbon powder mixture adhering to the commutator slot, and ensure that the commutator is cleaned at the best opportunity, thereby improving the user's experience.

[0137] Further, in the embodiment of the present application, as shown in Figure 4 Step 102 can further include the following steps:

[0138] In step 401, a second carbon powder threshold is determined according to the target carbon powder amount allowed by the commutator and a preset second value, wherein the second value is greater than the first value.

[0139] In step 402, if the actual carbon powder amount of the commutator is greater than or equal to the first carbon powder threshold and less than the second carbon powder threshold, it is determined whether the vehicle off time is greater than or equal to the first time value, the vehicle remaining power is greater than or equal to the remaining power threshold, and the vehicle motion state is a stationary state.

[0140] It should be noted that in the embodiment of the present application, the preset second value is greater than the first value, and the specific value of the second value can be adjusted later with the optimization of the scheme, wherein preferably, the second value can be 65%. After the second value is determined, the second carbon powder threshold = target carbon powder amount allowed by the commutator * preset second value.

[0141] The actual carbon powder amount of the commutator is compared with the first carbon powder amount threshold value and the second carbon powder amount threshold value. If the actual carbon powder amount of the commutator is greater than or equal to the first carbon powder amount threshold value and less than the second carbon powder amount threshold value, it is determined whether the vehicle engine-off time is greater than or equal to the first time value, whether the vehicle remaining power is greater than or equal to the remaining power threshold value, and whether the vehicle motion state is the stationary state.

[0142] In step 403, if the vehicle engine-off time is greater than or equal to the first time value, the vehicle remaining power is greater than or equal to the remaining power threshold value, and the vehicle motion state is the stationary state, the target rotation time of the motor is determined according to the minimum rotation time of the motor, the interval time of the commutator cleaning method, and the time interval period.

[0143] In step 404, the maximum rotation speed of the motor is taken as the target rotation speed of the motor.

[0144] It should be noted that in the embodiment of the present application, if the vehicle engine-off time is greater than or equal to the first time value, the vehicle remaining power is greater than or equal to the remaining power threshold value, and the vehicle motion state is the stationary state, the target rotation time of the motor is determined according to the minimum rotation time of the motor, the interval time of the commutator cleaning method, and the time interval period. Specifically, the target rotation time of the motor = the minimum rotation time of the motor *[1+(the interval time of the commutator cleaning method-the time interval period) / the minimum rotation time of the motor].

[0145] Meanwhile, the maximum rotation speed of the motor is taken as the target rotation speed of the motor.

[0146] In addition, after the motor is controlled by the electronic control unit to complete rotation at the target rotation speed of the motor and the target rotation time of the motor, the interval time of the commutator cleaning method is set to 1.

[0147] In step 405, if the vehicle engine-off time is less than the first time value, or the vehicle remaining power is less than the remaining power threshold value, or the vehicle motion state is the non-stationary state, the interval time of the commutator cleaning method is accumulated, and at the same time, the first prompt information is sent to the instrument of the vehicle and displayed for a preset first prompt time.

[0148] It should be noted that in the embodiment of the present application, if the vehicle off time is less than the first time value, or the vehicle remaining power is less than the remaining power threshold, or the vehicle motion state is a non-stationary state, the commutator cleaning method is stopped, and the interval time of the commutator cleaning method is accumulated on the basis of the interval time of the current commutator cleaning method. In addition, during the accumulation of the interval time of the commutator cleaning method, the first prompt information is sent to the instrument of the vehicle synchronously, and the preset first prompt time is maintained. For example, the intelligent torque manager can send "intelligent torque manager self-repair, please pay attention to night parking rest" to the instrument of the vehicle, and the prompt lasts for 1 minute.

[0149] The present application can effectively throw out the carbon powder on the commutator, avoid the intelligent torque manager failure caused by the carbon powder mixture adhering to the commutator slot, and ensure cleaning the commutator at the best opportunity, avoid cleaning the commutator in the case of affecting the driving safety of the vehicle, thereby improving the user experience.

[0150] Further, in the embodiment of the present application, as shown in Figure 5 Step 102 can further include the following steps:

[0151] Step 501, determining a third carbon powder threshold value according to the target carbon powder amount allowed by the commutator and a preset third value, wherein the third value is greater than the second value.

[0152] Step 502, if the actual carbon powder amount of the commutator is greater than or equal to the second carbon powder threshold value and less than the third carbon powder threshold value, determining whether the vehicle off time is greater than or equal to a preset second time value, whether the vehicle remaining power is greater than or equal to a remaining power threshold, and whether the vehicle motion state is a stationary state, wherein the second time value is less than the first time value.

[0153] It should be noted that in the embodiment of the present application, the preset third value is greater than the second value, and the specific value of the third value can be adjusted later with the optimization of the scheme, wherein preferably, the third value can be 90%. After the third value is determined, the third carbon powder threshold value = target carbon powder amount allowed by the commutator * preset third value.

[0154] The actual carbon powder amount of the commutator is compared with the second carbon powder amount threshold and the third carbon powder amount threshold. If the actual carbon powder amount of the commutator is greater than or equal to the second carbon powder amount threshold and less than the third carbon powder amount threshold, it is determined whether the vehicle off time is greater than or equal to a preset second time value, whether the remaining power of the vehicle is greater than or equal to a remaining power threshold, and whether the motion state of the vehicle is a stationary state, wherein the second time value is less than the first time value. Preferably, the second time value can be 4h.

[0155] In step 503, if the vehicle off time is greater than or equal to the second time value, the remaining power of the vehicle is greater than or equal to the remaining power threshold, and the motion state of the vehicle is the stationary state, the target rotation time of the motor is determined according to the minimum rotation time of the motor, the interval time of the commutator cleaning method, and the time interval period.

[0156] In step 504, the maximum rotation speed of the motor is taken as the target rotation speed of the motor.

[0157] It should be noted that in the embodiment of the present application, if the vehicle off time is greater than or equal to the second time value, the remaining power of the vehicle is greater than or equal to the remaining power threshold, and the motion state of the vehicle is the stationary state, the target rotation time of the motor is determined according to the minimum rotation time of the motor, the interval time of the commutator cleaning method, and the time interval period. Specifically, the target rotation time of the motor = the minimum rotation time of the motor *[1+(the interval time of the commutator cleaning method-the time interval period) / the minimum rotation time of the motor].

[0158] Meanwhile, the maximum rotation speed of the motor is taken as the target rotation speed of the motor.

[0159] In addition, after the motor is controlled to complete rotation by the electronic control unit according to the target rotation speed of the motor and the target rotation time of the motor, the interval time of the commutator cleaning method is set to 1.

[0160] In step 505, if the vehicle off time is less than the second time value, or the remaining power of the vehicle is less than the remaining power threshold, or the motion state of the vehicle is a non-stationary state, the interval time of the commutator cleaning method is accumulated, and at the same time, the second prompt information is sent to the instrument synchronously, and a preset second prompt time is displayed, wherein the second prompt time is greater than the first prompt time.

[0161] It should be noted that in the embodiment of the present application, if the vehicle off time is less than the second time value, or the vehicle remaining power is less than the remaining power threshold, or the vehicle motion state is a non-stationary state, the commutator cleaning method is stopped, and the interval time of the commutator cleaning method is accumulated on the basis of the interval time of the current commutator cleaning method. In addition, during the accumulation of the interval time of the commutator cleaning method, the second prompt information is sent to the instrument of the vehicle synchronously, and the preset second prompt time is maintained, wherein the second prompt time is greater than the first prompt time. For example, the intelligent torque manager can send "the intelligent torque manager needs to be repaired, please pay attention to parking" to the instrument of the vehicle, and the prompt lasts for 3 minutes.

[0162] The present application can effectively remove the carbon powder on the commutator, avoid the failure of the intelligent torque manager caused by the carbon powder mixture adhering to the commutator slot, and ensure that the commutator is cleaned at the best opportunity, thereby improving the user experience.

[0163] Further, in the embodiment of the present application, as shown in Figure 6 the step 102 can further include the following steps:

[0164] Step 601, if the actual carbon powder amount of the commutator is greater than or equal to the third carbon powder threshold, it is judged whether the vehicle motion state is a stationary state or a straight state.

[0165] Step 602, if the vehicle motion state is a stationary state or a straight state, the target rotation time of the motor is determined according to the minimum rotation time of the motor, the interval time of the commutator cleaning method and the time interval period.

[0166] Step 603, the maximum rotation speed of the motor is taken as the target rotation speed of the motor.

[0167] It should be noted that in the embodiment of the present application, if the actual carbon powder amount of the commutator is greater than or equal to the third carbon powder threshold, it is judged whether the vehicle motion state is a stationary state or a straight state. If the vehicle motion state is a stationary state or a straight state, the target rotation time of the motor is determined according to the minimum rotation time of the motor, the interval time of the commutator cleaning method and the time interval period, specifically, the target rotation time of the motor = the minimum rotation time of the motor *[1+(the interval time of the commutator cleaning method-the time interval period) / the minimum rotation time of the motor].

[0168] Meanwhile, the maximum rotation speed of the motor is set as a target rotation speed of the motor.

[0169] Further, after the motor is controlled to complete rotation by the electronic control unit according to the target rotation speed of the motor and the target rotation time of the motor, the interval time at which the commutator cleaning method is executed is set to 1.

[0170] Step 604: If the vehicle motion state is a non-stationary state or a non-straight-ahead state, stop executing the commutator cleaning method until the vehicle motion state is a stationary state or a straight-ahead state, and continue executing the commutator cleaning method. During the execution of the commutator cleaning method, the third prompt information is synchronously sent to the instrument until the execution of the commutator cleaning method is completed.

[0171] It should be noted that in the embodiment of the present application, if the vehicle motion state is a non-stationary state or a non-straight-ahead state, the execution of the commutator cleaning method is stopped until the vehicle motion state is a stationary state or a straight-ahead state, and the execution of the commutator cleaning method is continued. During the execution of the commutator cleaning method, the third prompt information is synchronously sent to the instrument until the execution of the commutator cleaning method is completed. For example, the intelligent torque manager can send the instrument of the vehicle with the prompt information "the intelligent torque manager is self-repairing, please pay attention to parking", and the prompt information is continued until the execution of the commutator cleaning method is completed.

[0172] The present application can effectively throw out the carbon powder on the commutator, avoid the failure of the intelligent torque manager caused by the mixture of carbon powder adhering to the commutator slot, and ensure the cleaning of the commutator at the best opportunity, avoid the cleaning of the commutator in the case of affecting the driving safety of the vehicle, thereby improving the user experience.

[0173] The second embodiment of the present application relates to a commutator cleaning device, and a device block diagram thereof is shown in Figure 7 The device block diagram comprises:

[0174] The data acquisition module 701 is configured to acquire the target carbon powder amount allowed by the commutator and the actual carbon powder amount of the commutator.

[0175] The motor rotation strategy determination module 702 is configured to determine the rotation strategy of the motor according to the comparison result between the target carbon powder amount allowed by the commutator and the actual carbon powder amount of the commutator, and based on the vehicle state information.

[0176] The commutator cleaning module 703 is configured to control the motor to rotate by the electronic control unit according to the rotation strategy of the motor, so that the commutator is rotated and the carbon powder of the actual carbon powder amount is thrown out.

[0177] Optionally, the data acquisition module comprises:

[0178] The commutator allowed target carbon powder amount acquisition submodule is configured to repeatedly execute the steps of increasing the carbon powder amount in the commutator, acquiring the current of the commutator, and judging whether the current of the commutator is abnormal until the current of the commutator is abnormal, acquire the carbon powder amount in the commutator, and take the carbon powder amount in the commutator as the commutator allowed target carbon powder amount.

[0179] Optionally, the data acquisition module comprises:

[0180] The motor rated rotating speed acquisition submodule is configured to acquire the rated rotating speed of the motor.

[0181] The motor control submodule is configured to control the motor to rotate at the rated rotating speed by the electronic control unit.

[0182] The carbon powder amount per unit time acquisition submodule is configured to acquire the carbon powder amount generated by the friction between the brush and the commutator per unit time when the motor is in the rotating state, and take the carbon powder amount generated by the friction between the brush and the commutator per unit time as the actual generated carbon powder amount per unit time.

[0183] The commutator actual carbon powder amount determination submodule is configured to determine the actual carbon powder amount of the commutator according to the interval time of the execution of the commutator cleaning method, the actual generated carbon powder amount per unit time, and the preset time interval period, wherein the interval time of the execution of the commutator cleaning method is determined according to the current time and the time of the last execution of the commutator cleaning method.

[0184] Optionally, the motor rotating strategy determination module comprises:

[0185] The vehicle state information acquisition submodule is configured to acquire vehicle state information, wherein the vehicle state information comprises vehicle engine-off time, vehicle remaining power, and vehicle motion state.

[0186] The first carbon powder amount threshold determination submodule is configured to determine a first carbon powder amount threshold according to the commutator allowed target carbon powder amount and a preset first numerical value.

[0187] The first vehicle state judgment submodule is configured to, if the actual carbon powder amount of the commutator is greater than or equal to 0 and less than the first carbon powder amount threshold, judge whether the vehicle engine-off time is greater than or equal to a preset first time value, whether the vehicle remaining power is greater than or equal to a preset remaining power threshold, and whether the vehicle motion state is a stationary state.

[0188] The motor minimum rotation time determination submodule is configured to determine the minimum rotation time of the motor according to the target carbon powder amount allowed by the commutator and the maximum rotation speed of the motor, if the vehicle shutdown time is greater than or equal to the first time value, the vehicle remaining power is greater than or equal to the remaining power threshold, and the vehicle motion state is the static state.

[0189] The first motor target rotation speed determination submodule is configured to take the maximum rotation speed of the motor obtained in advance as the target rotation speed of the motor.

[0190] The first motor target rotation time determination submodule is configured to take the minimum rotation time of the motor as the target rotation time of the motor.

[0191] The first interval time accumulation module is configured to accumulate the interval time of the commutator cleaning method, if the vehicle shutdown time is less than the first time value, or the vehicle remaining power is less than the remaining power threshold, or the vehicle motion state is the non-static state.

[0192] Optionally, the motor rotation strategy determination module comprises:

[0193] The second carbon powder amount threshold determination submodule is configured to determine the second carbon powder amount threshold according to the target carbon powder amount allowed by the commutator and a preset second value, wherein the second value is greater than the first value.

[0194] The second vehicle state judgment submodule is configured to judge whether the vehicle shutdown time is greater than or equal to the first time value, whether the vehicle remaining power is greater than or equal to the remaining power threshold, and whether the vehicle motion state is the static state, if the actual carbon powder amount of the commutator is greater than or equal to the first carbon powder amount threshold and less than the second carbon powder amount threshold.

[0195] The second motor target rotation time determination submodule is configured to determine the target rotation time of the motor according to the minimum rotation time of the motor, the interval time of the commutator cleaning method, and the time interval period, if the vehicle shutdown time is greater than or equal to the first time value, the vehicle remaining power is greater than or equal to the remaining power threshold, and the vehicle motion state is the static state.

[0196] The second motor target rotation speed determination submodule is configured to take the maximum rotation speed of the motor as the target rotation speed of the motor.

[0197] The first instrument prompt submodule is configured to accumulate the interval time of the commutator cleaning method, and synchronously send the first prompt information to the instrument of the vehicle and keep displaying the preset first prompt time in the process of accumulating the interval time of the commutator cleaning method, if the vehicle shutdown time is less than the first time value, or the vehicle remaining power is less than the remaining power threshold, or the vehicle motion state is the non-static state.

[0198] Optionally, the motor rotation strategy determination module comprises:

[0199] a third carbon powder amount threshold determination submodule configured to determine a third carbon powder amount threshold according to the target carbon powder amount allowed by the commutator and a preset third numerical value, wherein the third numerical value is greater than the second numerical value;

[0200] a third vehicle state judgment submodule configured to determine whether the vehicle off time is greater than or equal to a preset second time numerical value, whether the vehicle remaining power is greater than or equal to the remaining power threshold, and whether the vehicle motion state is the stationary state, if the actual carbon powder amount of the commutator is greater than or equal to the second carbon powder amount threshold and less than the third carbon powder amount threshold, wherein the second time numerical value is less than the first time numerical value;

[0201] a third motor target rotation time determination submodule configured to determine the target rotation time of the motor according to the minimum rotation time of the motor, the interval time of the execution of the commutator cleaning method, and the time interval period, if the vehicle off time is greater than or equal to the second time numerical value, the vehicle remaining power is greater than or equal to the remaining power threshold, and the vehicle motion state is the stationary state;

[0202] a third motor target rotation speed determination submodule configured to take the maximum rotation speed of the motor as the target rotation speed of the motor;

[0203] a second instrument prompting submodule configured to accumulate the interval time of the execution of the commutator cleaning method, and synchronously send the second prompt information to the instrument and keep displaying the preset second prompt time in the process of accumulating the interval time of the execution of the commutator cleaning method, if the vehicle off time is less than the second time numerical value, or the vehicle remaining power is less than the remaining power threshold, or the vehicle motion state is the non-stationary state, wherein the second prompt time is greater than the first prompt time.

[0204] Optionally, the motor rotation strategy determination module comprises:

[0205] a fourth vehicle state judgment submodule configured to determine whether the vehicle motion state is the stationary state or the straight-ahead state, if the actual carbon powder amount of the commutator is greater than or equal to the third carbon powder amount threshold;

[0206] a fourth motor target rotation time determination submodule configured to determine the target rotation time of the motor according to the minimum rotation time of the motor, the interval time of the execution of the commutator cleaning method, and the time interval period, if the vehicle motion state is the stationary state or the straight-ahead state;

[0207] a fourth motor target rotation speed determination submodule configured to take the maximum rotation speed of the motor as the target rotation speed of the motor;

[0208] The third instrument prompting sub-module is configured to, if the vehicle motion state is a non-stationary state or a non-straight state, stop executing the commutator cleaning method until the vehicle motion state is a stationary state or a straight state, and continue to execute the commutator cleaning method, and in the process of continuing to execute the commutator cleaning method, synchronously send third prompting information to the instrument until the commutator cleaning method is executed completely.

[0209] For the device embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts are referred to the part of the description of the method embodiments.

[0210] The third embodiment of the present application relates to a storage medium, on which a computer program is stored, the computer program is executed by a processor to realize the commutator cleaning method steps of the first aspect.

[0211] The fourth embodiment of the present application provides a vehicle, which comprises the commutator cleaning device of the second aspect of the present application.

[0212] Those skilled in the art can understand that the modules in the device in the embodiments can be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or components in the embodiments can be combined into one module or unit or component, and furthermore can be divided into multiple sub-modules or sub-units or sub-components. Except that at least some of such features and / or processes or units are mutually exclusive, all the features disclosed in the specification (including the accompanying claims, abstract and drawings) and all the processes or units of any method or device disclosed in this way can be combined in any combination. Unless explicitly stated otherwise, each feature disclosed in the specification (including the accompanying claims, abstract and drawings) can be replaced by an alternative feature providing the same, equivalent or similar purpose.

[0213] In addition, those skilled in the art can understand that although some embodiments described herein include certain features included in other embodiments but not others, the combination of features of different embodiments means within the scope of the present application and forms different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0214] It should be noted that the above-mentioned embodiments illustrate rather than limit the application, and that those skilled in the art will be able to design many alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The application can be implemented by means of both hardware and software, and any combination thereof. In a unitary claim, several devices or means can be listed, comprising means which can be implemented by one and the same hardware item. The use of the word "a" or "an" does not exclude the presence of a plurality of such elements, nor does it imply that a single element is to be used.

Claims

1. A commutator cleaning method, characterized in that, Applied to an intelligent torque manager, the intelligent torque manager including an electronic control unit and a motor, the motor including a commutator, the method includes: Obtain the target amount of toner allowed by the commutator and the actual amount of toner in the commutator; Based on the comparison between the target amount of toner allowed by the commutator and the actual amount of toner in the commutator, and based on vehicle status information, the rotation strategy of the motor is determined. The electronic control unit controls the motor to rotate according to the motor's rotation strategy, so that the commutator rotates and throws out the actual amount of toner. The step of determining the motor rotation strategy based on the comparison between the target toner quantity allowed by the commutator and the actual toner quantity of the commutator, and based on vehicle status information, includes: Obtain vehicle status information, which includes vehicle shutdown time, remaining vehicle battery power, and vehicle movement status. The first toner quantity threshold is determined based on the target toner quantity allowed by the commutator and the preset first value. If the actual carbon powder amount of the commutator is greater than or equal to 0 and less than the first carbon powder amount threshold, then it is determined whether the vehicle shutdown time is greater than or equal to a preset first time value, whether the vehicle remaining battery power is greater than or equal to a preset remaining battery power threshold, and whether the vehicle's motion state is a stationary state. If the vehicle shutdown time is greater than or equal to the first time value, the vehicle remaining battery power is greater than or equal to the remaining battery power threshold, and the vehicle's motion state is the stationary state, then the minimum rotation time of the motor is determined based on the target carbon powder amount allowed by the commutator and the maximum rotation speed of the motor. The maximum rotational speed of the motor obtained in advance is taken as the target rotational speed of the motor; The minimum rotation time of the motor is taken as the target rotation time of the motor; If the vehicle's shutdown time is less than the first time value, or the vehicle's remaining battery power is less than the remaining battery power threshold, or the vehicle's motion state is not stationary, then the interval time for executing the commutator cleaning method is accumulated, wherein the interval time for executing the commutator cleaning method is determined based on the current time and the time of the last execution of the commutator cleaning method.

2. The method according to claim 1, characterized in that, The step of obtaining the target amount of toner allowed by the commutator includes: Repeat the steps of increasing the amount of toner in the commutator, obtaining the current of the commutator, and determining whether the current of the commutator is abnormal, until the current of the commutator is abnormal. Then, obtain the amount of toner in the commutator and use the amount of toner in the commutator as the target amount of toner allowed for the commutator.

3. The method according to claim 1, characterized in that, The motor includes brushes; The process of obtaining the actual amount of carbon powder in the commutator includes: Obtain the rated rotational speed of the motor; The electronic control unit controls the motor to rotate at the rated rotation speed; When the motor is rotating, the amount of carbon powder generated by the friction between the brush and the commutator per unit time is obtained, and the amount of carbon powder generated by the friction between the brush and the commutator per unit time is taken as the actual amount of carbon powder generated per unit time. The actual amount of toner in the commutator is determined based on the interval between the execution of the commutator cleaning method, the actual amount of toner generated per unit time, and the preset time interval period.

4. The method according to claim 3, characterized in that, The step of determining the motor rotation strategy based on the comparison between the target toner quantity allowed by the commutator and the actual toner quantity of the commutator, and based on vehicle status information, includes: A second toner quantity threshold is determined based on the target toner quantity allowed by the commutator and a preset second value, wherein the second value is greater than the first value; If the actual carbon powder amount of the commutator is greater than or equal to the first carbon powder amount threshold and less than the second carbon powder amount threshold, then it is determined whether the vehicle shutdown time is greater than or equal to the first time value, whether the vehicle remaining battery power is greater than or equal to the remaining battery power threshold, and whether the vehicle movement state is the stationary state. If the vehicle shutdown time is greater than or equal to the first time value, the vehicle remaining battery power is greater than or equal to the remaining battery power threshold, and the vehicle movement state is the stationary state, then the target rotation time of the motor is determined based on the minimum rotation time of the motor, the interval time of the commutator cleaning method, and the time interval period. The maximum rotational speed of the motor is taken as the target rotational speed of the motor. If the vehicle's shutdown time is less than the first time value, or the vehicle's remaining battery power is less than the remaining battery power threshold, or the vehicle's motion state is the non-stationary state, then the interval time for executing the commutator cleaning method is accumulated. During the accumulation of the interval time for executing the commutator cleaning method, a first prompt message is simultaneously sent to the vehicle's instrument panel, and the preset first prompt message is displayed for a set time.

5. The method according to claim 4, characterized in that, The step of determining the motor rotation strategy based on the comparison between the target toner quantity allowed by the commutator and the actual toner quantity of the commutator, and based on vehicle status information, includes: Based on the target toner amount allowed by the commutator and a preset third value, a third toner amount threshold is determined, wherein the third value is greater than the second value; If the actual carbon powder amount of the commutator is greater than or equal to the second carbon powder amount threshold and less than the third carbon powder amount threshold, then it is determined whether the vehicle shutdown time is greater than or equal to a preset second time value, whether the vehicle remaining battery power is greater than or equal to the remaining battery power threshold, and whether the vehicle movement state is the stationary state, wherein the second time value is less than the first time value. If the vehicle shutdown time is greater than or equal to the second time value, the vehicle remaining battery power is greater than or equal to the remaining battery power threshold, and the vehicle movement state is the stationary state, then the target rotation time of the motor is determined based on the minimum rotation time of the motor, the interval time of the commutator cleaning method, and the time interval period. The maximum rotational speed of the motor is taken as the target rotational speed of the motor. If the vehicle's shutdown time is less than the second time value, or the vehicle's remaining battery power is less than the remaining battery power threshold, or the vehicle's movement state is the non-stationary state, then the interval time for executing the commutator cleaning method is accumulated. During the accumulation of the interval time for executing the commutator cleaning method, a second prompt message is simultaneously sent to the instrument panel, and the preset second prompt time is maintained, wherein the second prompt time is greater than the first prompt time.

6. The method according to claim 5, characterized in that, The step of determining the motor rotation strategy based on the comparison between the target toner quantity allowed by the commutator and the actual toner quantity of the commutator, and based on vehicle status information, includes: If the actual amount of carbon powder in the commutator is greater than or equal to the third carbon powder amount threshold, then it is determined whether the vehicle's motion state is the stationary state or the straight-moving state. If the vehicle's motion state is either stationary or straight-moving, then the target rotation time of the motor is determined based on the minimum rotation time of the motor, the interval of the commutator cleaning method, and the time interval period. The maximum rotational speed of the motor is taken as the target rotational speed of the motor. If the vehicle's motion state is either non-stationary or non-straight-moving, the commutator cleaning method is stopped until the vehicle's motion state becomes either stationary or straight-moving. In this case, the commutator cleaning method is resumed, and a third prompt message is sent to the instrument panel simultaneously until the commutator cleaning method is completed.

7. A commutator cleaning device, characterized in that, The device includes: The data acquisition module is used to acquire the target amount of toner allowed by the commutator and the actual amount of toner in the commutator; The motor rotation strategy determination module is used to determine the motor rotation strategy based on the comparison result between the target amount of toner allowed by the commutator and the actual amount of toner in the commutator, and based on vehicle status information. The commutator cleaning module is used to control the motor to rotate according to the motor's rotation strategy via an electronic control unit, so that the commutator rotates and throws out the actual amount of toner. The motor rotation strategy determination module includes: The vehicle status information acquisition submodule is used to acquire vehicle status information, which includes vehicle shutdown time, vehicle remaining battery power, and vehicle movement status. The first toner quantity threshold determination submodule is used to determine the first toner quantity threshold based on the target toner quantity allowed by the commutator and a preset first value. The first vehicle status determination submodule is used to determine whether the vehicle shutdown time is greater than or equal to a preset first time value, whether the vehicle remaining battery power is greater than or equal to a preset remaining battery power threshold, and whether the vehicle motion state is stationary if the actual carbon powder amount of the commutator is greater than or equal to 0 and less than the first carbon powder amount threshold. The motor minimum rotation time determination submodule is used to determine the minimum rotation time of the motor based on the target carbon powder amount allowed by the commutator and the maximum rotation speed of the motor if the vehicle shutdown time is greater than or equal to the first time value, the vehicle remaining power is greater than or equal to the remaining power threshold, and the vehicle movement state is the stationary state. The first motor target rotation speed determination submodule is used to take the pre-acquired maximum rotation speed of the motor as the target rotation speed of the motor; The first motor target rotation time determination submodule is used to take the minimum rotation time of the motor as the target rotation time of the motor. The first interval time accumulation module is used to accumulate the interval time for executing the commutator cleaning method if the vehicle shutdown time is less than the first time value, or the vehicle remaining battery power is less than the remaining battery power threshold, or the vehicle is in a non-stationary state. The interval time for executing the commutator cleaning method is determined based on the current time and the time of the last execution of the commutator cleaning method.

8. A storage medium, characterized in that, The storage medium stores a computer program that, when executed by a processor, implements the steps of the commutator cleaning method as described in any one of claims 1 to 6.

9. A vehicle, characterized in that, Includes the commutator cleaning device as described in claim 7.

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