Commutator cleaning method and device, storage medium and vehicle

Abstract

The invention provides a commutator cleaning method and device, a storage medium and a vehicle. The method comprises the steps that the allowable target carbon powder amount of a commutator and the actual carbon powder amount of the commutator are acquired; according to a comparison result between a target carbon powder amount allowed by the commutator and an actual carbon powder amount of the commutator and based on the vehicle state information, determining a rotation strategy of the motor; the electronic control unit controls the motor to rotate according to the rotation strategy of the motor, so that the commutator rotates, and the carbon powder with the actual carbon powder amount is thrown out. The electronic control unit controls the motor to rotate according to the rotation strategy of the motor, carbon powder on the commutator can be effectively thrown out, the situation that the current of the commutator is increased abnormally due to the fact that a carbon powder mixture is attached to the interior of a commutator groove is avoided, and further the failure rate of the intelligent torque manager can be reduced.

Description

Technical Field

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

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

[0003] However, when a vehicle equipped with an intelligent torque manager is in motion, the motor and oil pump are always in operation. The oil or foreign matter in the oil pump will enter the seal of the oil pump, causing the seal to fail, and then the oil will enter the inside of the motor. In addition, the brushes and commutator inside the motor will inevitably have carbon powder and copper powder falling off as they are used. When the carbon powder and copper powder come into contact with the oil, the adhesion of the carbon powder and copper powder will be greatly increased, causing the powder mixture to adhere to the slot of the commutator. As the attachments increase, the slot of the commutator gradually becomes conductive, causing the internal resistance of the commutator to decrease, and the current of the commutator to increase abnormally, which eventually leads to the failure of the intelligent torque manager. Therefore, in order to avoid the failure of the intelligent torque manager, it is particularly important to know how to clean the carbon powder in the commutator. Summary of the invention

[0004] In view of this, the present invention aims to propose a commutator cleaning method, device, storage medium and vehicle, which control the motor to rotate according to the motor's rotation strategy to rotate the commutator and throw out the actual amount of carbon powder, thereby achieving timely cleaning of the carbon powder in the commutator and avoiding the occurrence of intelligent torque manager failure.

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

[0006] Acquire the target carbon powder amount allowed by the commutator and the actual carbon powder amount of the commutator;

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

[0008] The electronic control unit controls the motor to rotate according to the rotation strategy of the motor, so that the commutator rotates and the actual amount of toner is thrown out.

[0009] Optionally, obtaining a target carbon powder amount allowed by the commutator includes:

[0010] Repeat the steps of increasing the amount of carbon powder 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, obtaining the amount of carbon powder in the commutator, and using the amount of carbon powder in the commutator as the target amount of carbon powder allowed by the commutator.

[0011] Optionally, the motor includes brushes;

[0012] The obtaining of the actual carbon powder amount of the commutator comprises:

[0013] Obtaining the rated rotation speed of the motor;

[0014] Controlling the motor to rotate according to the rated rotation 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 used as the actual amount of carbon powder generated per unit time;

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

[0017] Optionally, the determining 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 comprises:

[0018] Acquiring vehicle status information, wherein the vehicle status information includes vehicle shutdown time, vehicle remaining power, and vehicle movement status;

[0019] Determining a first toner amount threshold value according to a target toner amount allowed by the commutator and a preset first value;

[0020] 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 shutdown 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 vehicle movement 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 movement state is the stationary state, determining 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;

[0022] using the pre-acquired maximum rotation speed of the motor as the target rotation speed of the motor;

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

[0024] 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 is in a non-stationary state, the interval time for executing the commutator cleaning method is accumulated.

[0025] Optionally, the determining 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 comprises:

[0026] Determining a second toner amount threshold value 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 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 determine 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 movement state is the stationary state;

[0028] 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, then according to the minimum rotation time of the motor, the interval time of executing the commutator cleaning method and the time interval period, determine the target rotation time of the motor;

[0029] using the maximum rotation speed of the motor as the target rotation speed of the motor;

[0030] If the vehicle shutdown time is less than the first time value, or the remaining power of the vehicle is less than the remaining power threshold, or the vehicle's motion state is the non-stationary state, the interval time for executing the commutator cleaning method is accumulated. During the process of accumulating the interval time for executing the commutator cleaning method, a first prompt message is synchronously sent to the vehicle's instrument, and the preset first prompt time is kept displayed.

[0031] Optionally, the determining 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 comprises:

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

[0033] 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 shutdown time is greater than or equal to a preset second time value, whether the vehicle remaining power is greater than or equal to the remaining power threshold, and whether the vehicle movement state is the stationary state, wherein the second time value is less than the first time value;

[0034] If the vehicle shutdown time is greater than or equal to the second 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 executing the commutator cleaning method, and the time interval period;

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

[0036] If the vehicle shutdown time is less than the second time value, or the vehicle remaining power is less than the remaining power threshold, or the vehicle movement state is the non-stationary state, the interval time for executing the commutator cleaning method is accumulated. In the process of accumulating the interval time for executing the commutator cleaning method, a second prompt message is synchronously sent to the instrument, and the preset second prompt time is kept displayed, wherein the second prompt time is greater than the first prompt time.

[0037] Optionally, the determining 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 comprises:

[0038] If the actual carbon powder amount of the commutator is greater than or equal to the third carbon powder amount threshold, determining whether the vehicle movement state is the stationary state or the straight-moving state;

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

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

[0041] If the vehicle's motion state is the non-stationary state or the non-straight-ahead state, the commutator cleaning method is stopped until the vehicle's motion state is the stationary state or the straight-ahead state, and the commutator cleaning method is continued to be executed. During the process of continuing to execute the commutator cleaning method, a third prompt message is synchronously sent to the instrument until the commutator cleaning method is completed.

[0042] According to a second aspect of the present invention, there is provided a commutator cleaning device, the device comprising:

[0043] A data acquisition module, used for acquiring a target carbon powder amount allowed by the commutator and an actual carbon powder amount of the commutator;

[0044] a motor rotation strategy determination module, configured to determine a rotation strategy of the motor according to a comparison result between a target carbon powder amount allowed by the commutator and an actual carbon powder amount of the commutator, and based on vehicle state information;

[0045] The commutator cleaning module is used to control the motor to rotate according to the rotation strategy of the motor through the electronic control unit, so that the commutator rotates and the actual amount of carbon powder is thrown out.

[0046] Optionally, the data acquisition module includes:

[0047] The submodule for obtaining the target carbon powder amount allowed by the commutator is used to repeatedly execute the steps of increasing the carbon powder amount in the commutator, obtaining the current of the commutator, and judging whether the current of the commutator is abnormal, until the current of the commutator is abnormal, obtaining the carbon powder amount in the commutator, and using the carbon powder amount in the commutator as the target carbon powder amount allowed by the commutator.

[0048] Optionally, the data acquisition module includes:

[0049] A motor rated rotation speed acquisition submodule, used to acquire the rated rotation speed of the motor;

[0050] a motor control submodule, configured to control the motor to rotate according to the rated rotation speed through the electronic control unit;

[0051] A submodule for obtaining the amount of carbon powder per unit time, for obtaining the amount of carbon powder generated by the friction between the brush and the commutator per unit time when the motor is in a rotating state, and taking the amount of carbon powder generated by the friction between the brush and the commutator per unit time as the amount of carbon powder actually generated per unit time;

[0052] The submodule for determining the actual carbon powder amount of the commutator is used to determine the actual carbon powder amount of the commutator based on the interval time of executing 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 executing the commutator cleaning method is determined based on the current time and the time when the commutator cleaning method was last executed.

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

[0054] The vehicle status information acquisition submodule is used to acquire the vehicle status information, wherein the vehicle status information includes the vehicle shutdown time, the vehicle remaining power and the vehicle movement status;

[0055] A first toner amount threshold determination submodule, used for determining a first toner amount threshold according to a target toner amount allowed by the commutator and a preset first value;

[0056] A first vehicle state judgment submodule is used to judge whether the vehicle shutdown 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 movement state is a stationary state 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;

[0057] a motor minimum rotation time determination submodule, 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 stationary state;

[0058] A first motor target rotation speed determination submodule, configured to use a pre-acquired maximum rotation speed of the motor as a target rotation speed of the motor;

[0059] a first motor target rotation time determination submodule, configured to use the minimum rotation time of the motor as the target rotation time of the motor;

[0060] The first interval time accumulation module is used to accumulate the interval time of executing the commutator cleaning method if the vehicle shutdown time is less than the first time value, or the remaining power of the vehicle is less than the remaining power threshold, or the vehicle movement state is non-stationary.

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

[0062] A second toner amount threshold determination submodule, configured to determine a second toner amount threshold according to a target toner 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 judgment submodule is used 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 movement state is the stationary 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;

[0064] a second 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 for executing the commutator cleaning method, and the time interval period if the vehicle ignition 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;

[0065] A second motor target rotation speed determination submodule, configured to use the maximum rotation speed of the motor as the target rotation speed of the motor;

[0066] The first instrument prompt submodule is used to accumulate the interval time of the commutator cleaning method if the vehicle shutdown time is less than the first time value, or the remaining power of the vehicle is less than the remaining power threshold, or the vehicle movement state is the non-stationary state. During the process of accumulating the interval time of the commutator cleaning method, a first prompt message is synchronously sent to the vehicle's instrument and the preset first prompt time is kept displayed.

[0067] Optionally, the motor rotation strategy determination module includes:

[0068] a third toner amount threshold determination submodule, configured to determine a third toner amount threshold according to a target toner 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 judgment submodule is used to judge whether the vehicle shutdown time is greater than or equal to a preset second time value, whether the vehicle remaining power is greater than or equal to the remaining power threshold, and whether the vehicle movement 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 value is less than the first time value;

[0070] 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 for executing the commutator cleaning method, and the time interval period if the vehicle ignition off time is greater than or equal to the second 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;

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

[0072] The second instrument prompt submodule is used to accumulate the interval time of the commutator cleaning method if the vehicle shutdown time is less than the second time value, or the remaining power of the vehicle is less than the remaining power threshold, or the vehicle movement state is the non-stationary state. In the process of accumulating the interval time of the commutator cleaning method, a second prompt message is synchronously sent to the instrument and the preset second prompt time is kept displayed, wherein the second prompt time is greater than the first prompt time.

[0073] Optionally, the motor rotation strategy determination module includes:

[0074] a fourth vehicle state judgment submodule, configured to judge whether the vehicle motion state is the stationary state or the straight-moving state if the actual carbon powder amount of the commutator is greater than or equal to the third carbon powder amount threshold;

[0075] 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 for executing the commutator cleaning method, and the time interval period if the vehicle motion state is the stationary state or the straight-ahead state;

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

[0077] The third instrument prompt submodule is used to stop executing the commutator cleaning method if the vehicle movement state is the non-stationary state or the non-straight-ahead state, and continue to execute the commutator cleaning method until the vehicle movement state is the stationary state or the straight-ahead state. During the process of continuing to execute the commutator cleaning method, a third prompt message is synchronously sent to the instrument until the commutator cleaning method is completed.

[0078] According to a third aspect of the present invention, there is provided a storage medium storing a computer program, wherein when the computer program is executed by a processor, the steps of the commutator cleaning method as described in any one of the first aspect are implemented.

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

[0080] A commutator cleaning method provided by an embodiment of the present invention is applied to an intelligent torque manager, wherein the intelligent torque manager includes an electronic control unit and a motor, wherein the motor includes a commutator, and 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 the vehicle state information; the electronic control unit controls the motor to rotate 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 present invention controls the motor to rotate according to the rotation strategy of the motor by the electronic control unit, and can effectively throw out the carbon powder on the commutator, avoid the carbon powder mixture adhering to the commutator slot, resulting in the gradual conduction of the commutator slot, the internal resistance of the commutator becomes smaller, the current of the commutator increases abnormally, and other problems, and further, the failure rate of the intelligent torque manager can be reduced, and the reliability and safety of the vehicle can be improved. In addition, the present invention can timely discover the situation of excessive accumulation of carbon powder in the commutator by obtaining the actual carbon powder amount of the commutator in real time and comparing it with the target carbon powder amount allowed by the commutator.

[0081] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0082] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0083] Figure 1 This is one of the step flow charts of a commutator cleaning method provided by an embodiment of the present invention;

[0084] Figure 2 This is a second step flow chart of a commutator cleaning method provided by an embodiment of the present invention;

[0085] Figure 3This is a step flow chart of a commutator cleaning method provided by an embodiment of the present invention;

[0086] Figure 4 This is a fourth step flow chart of a commutator cleaning method provided by an embodiment of the present invention;

[0087] Figure 5 This is a step flow chart of a commutator cleaning method provided by an embodiment of the present invention;

[0088] Figure 6 This is a sixth step flow chart of a commutator cleaning method provided by an embodiment of the present invention;

[0089] Figure 7 It is a device block diagram of a commutator cleaning device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0090] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0091] The terms "first", "second", etc. in the specification and claims of the present invention are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0092] In conjunction with the accompanying drawings, a commutator cleaning method, device, storage medium and vehicle provided by the embodiments of the present invention are described in detail below through specific embodiments and their application scenarios.

[0093] See also Figure 1 , Figure 1 A flow chart of the steps of a commutator cleaning method provided by an embodiment of the present invention, the commutator cleaning method comprises the following steps:

[0094] Step 101 : obtaining a target carbon powder amount allowed by the commutator and an actual carbon powder amount of the commutator.

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

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

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

[0098] The maximum amount of carbon powder allowed in the commutator is the target amount of carbon powder allowed by the commutator, and the actual amount of carbon powder in the commutator is the actual amount of carbon powder in 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, the target carbon powder amount allowed by the commutator is compared with the actual carbon powder amount of the commutator to obtain a comparison result between the two. The rotation strategy of the motor is determined based on 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 status information.

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

[0101] The present invention controls the rotation of the motor according to the rotation strategy of the motor through the electronic control unit, which can effectively throw out the carbon powder on the commutator, avoid the carbon powder mixture from adhering to the commutator slot, causing the commutator slot to gradually conduct, the internal resistance of the commutator to decrease, the current of the commutator to increase abnormally, and other problems. Further, the failure rate of the intelligent torque manager can be reduced, and the reliability and safety of the vehicle can be improved. In addition, the present invention can timely detect the situation of excessive accumulation of carbon powder in the commutator by obtaining the actual amount of carbon powder in the commutator in real time and comparing it with the target amount of carbon powder allowed by the commutator.

[0102] Furthermore, in the embodiment of the present invention, step 101 may also include the following steps:

[0103] Repeat the steps of increasing the amount of carbon powder 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, obtaining the amount of carbon powder in the commutator, and using the amount of carbon powder in the commutator as the target amount of carbon powder allowed by the commutator.

[0104] It should be noted that, in the embodiment of the present invention, the specific implementation process of obtaining the target carbon powder amount allowed by the commutator is: select a sturdy bench to ensure that it can withstand the weight of the motor and the vibration during operation; the necessary sensors and data acquisition equipment should be installed on the bench to monitor the running status of the motor in real time. Use appropriate fixing devices (such as bolts, clamps, etc.) to firmly mount the motor on the bench; ensure that the axis of the motor is aligned with the axis of the bench to reduce the test error. After the motor is installed on the bench, first add carbon powder to the slot of the commutator, start the motor and run it for a period of time, and test the current of the commutator. Each time a certain amount of carbon powder is added, the above test process is repeated, and the current of the commutator after each addition of carbon powder is recorded. By analyzing the current of the commutator after each addition of carbon powder, observing the current of the commutator under different amounts of carbon powder, find the critical point where the current of the commutator increases abnormally, that is, the current of the commutator is abnormal. Obtain the amount of carbon powder in the commutator at this time, and the amount of carbon powder in the commutator at this time is the target carbon powder amount allowed by the commutator.

[0105] The present invention gradually increases the amount of carbon powder in the commutator and monitors the current changes of the commutator in real time, so as to accurately determine the critical point of abnormal increase of the commutator current, thereby determining the target carbon powder amount allowed by the commutator. Furthermore, the commutator can be cleaned in time when the carbon powder amount in the commutator is close to the target carbon powder amount, so as to avoid abnormal increase of the commutator current due to excessive accumulation of carbon powder, thereby improving the cleaning efficiency of the commutator.

[0106] Further, in an embodiment of the present invention, if Figure 2 As shown, step 101 may also include the following steps:

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

[0108] Step 202: Control the motor to rotate at a rated rotation speed through an electronic control unit.

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

[0110] Step 204, determining the actual amount of carbon powder in the commutator based on the interval time of the commutator cleaning method, the actual amount of carbon powder generated per unit time, and the preset time interval period, wherein the interval time of the commutator cleaning method is determined based on the current time and the time when the commutator cleaning method was last executed.

[0111] It should be noted that, in the embodiment of the present invention, the motor further includes a brush.

[0112] The specific implementation process of obtaining the interval time of executing the commutator cleaning method is: obtaining the current time and the time when the commutator cleaning method was last executed in advance. The interval time of executing the commutator cleaning method = the current time - the time when the commutator cleaning method was last executed.

[0113] The specific implementation process of obtaining the actual amount of carbon powder generated per unit time is as follows: obtaining the rated rotation speed of the motor. The motor is controlled to rotate according to the rated rotation speed by the electronic control unit. 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 used as the actual amount of carbon powder generated per unit time.

[0114] The preset time interval period may preferably be 2 months (60 days), and the specific value of the preset time interval period may be adjusted later as the solution is optimized.

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

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

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

[0118] If the interval time of executing 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 invention determines the actual amount of carbon powder in the commutator according to the interval time of the execution of the commutator cleaning method, the actual amount of carbon powder generated per unit time and the preset time interval period, thereby achieving accurate calculation of the actual amount of carbon powder in the commutator. The commutator can be cleaned in time when the amount of carbon powder is close to the target amount of carbon powder, avoiding abnormal increase of commutator current due to excessive accumulation of carbon powder, thereby improving the cleaning efficiency of the commutator.

[0120] Further, in an embodiment of the present invention, if Figure 3 As shown, step 102 may further include the following steps:

[0121] Step 301, obtaining vehicle status information, wherein the vehicle status information includes vehicle shutdown time, vehicle remaining power, and vehicle movement status.

[0122] Step 302: determining a first toner amount threshold value according to a target toner 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, determine whether the vehicle shutdown time is greater than or equal to the preset first time value, whether the vehicle remaining power is greater than or equal to the preset remaining power threshold, and whether the vehicle movement state is stationary.

[0124] It should be noted that, in the embodiment of the present invention, the vehicle status information is acquired in advance, wherein the vehicle status information includes the vehicle shutdown time, the vehicle remaining power and the vehicle movement status.

[0125] The preset first value may be 65%, and the specific value of the first value may be adjusted later as the solution is optimized. After the first value is determined, the first toner amount threshold value = the target toner amount allowed by the commutator * the preset first value.

[0126] Compare the actual carbon powder amount of the commutator 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, then determine whether the vehicle shutdown time is greater than or equal to the preset first time value, whether the vehicle's remaining power is greater than or equal to the preset remaining power threshold, and whether the vehicle's motion state is stationary. Among them, the preset first time value can preferably be 8h, and the preset remaining power threshold can preferably be 75%. The specific value of the first time value and the specific value of the remaining power threshold can be adjusted later as the solution is optimized.

[0127] Step 304, 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 stationary, then 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.

[0128] Step 305: Using the pre-acquired maximum rotation speed of the motor as the target rotation speed of the motor.

[0129] Step 306: Taking the minimum rotation time of the motor as the target rotation time of the motor.

[0130] It should be noted that, in an embodiment of the present invention, if the vehicle's ignition off time is greater than or equal to the first time value, the vehicle's remaining power is greater than or equal to the remaining power threshold, and the vehicle's moving state is stationary, then the minimum rotation time of the motor is determined based on the target amount of carbon powder allowed by the commutator and the maximum rotation speed of the motor. Specifically, the minimum rotation time of the motor = the target amount of carbon powder allowed by the commutator / the maximum rotation speed of the motor.

[0131] Preferably, the rotation strategy of the motor is: the target rotation speed of the motor is a pre-acquired maximum rotation speed of the motor, and the target rotation time of the motor is a minimum rotation time of the motor.

[0132] In addition, the target rotation speed of the motor can also be determined based on the preset value and the maximum rotation speed of the motor. Specifically, the target rotation speed of the motor = preset value * 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 based on the target amount of carbon powder allowed by the commutator and the target rotation speed of the motor. Specifically, the target rotation time of the motor = target amount of carbon powder allowed by the commutator / (preset value * 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 amount of carbon powder allowed by the commutator / (75% * maximum rotation speed of the motor).

[0133] In addition, after the motor is controlled to rotate according to the target rotation speed and the target rotation time of the motor by the electronic control unit, the interval time for executing the commutator cleaning method is set to 1.

[0134] Step 307: 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 is in a non-stationary state, the interval time for executing the commutator cleaning method is accumulated.

[0135] It should be noted that, in an embodiment of the present invention, if the vehicle shutdown time is less than the first time value, or the vehicle's remaining power is less than the remaining power threshold, or the vehicle's motion state is non-stationary, the commutator cleaning method is stopped and the interval time of the commutator cleaning method is accumulated based on the interval time of the current commutator cleaning method.

[0136] The present invention obtains vehicle status information (including vehicle shutdown time, vehicle remaining power and vehicle movement status) and dynamically adjusts the rotation strategy of the motor according to the actual carbon powder amount of the commutator and the carbon powder amount threshold. It can not only effectively throw out the carbon powder on the commutator to avoid intelligent torque manager failure caused by carbon powder mixture adhering to the commutator slot, but also ensure that the commutator is cleaned at the best time to avoid cleaning the commutator when it affects the driving safety of the vehicle, thereby improving the user experience.

[0137] Further, in an embodiment of the present invention, if Figure 4 As shown, step 102 may further include the following steps:

[0138] Step 401, determining a second toner amount threshold value according to a target toner amount allowed by the commutator and a preset second value, wherein the second value is greater than the first value.

[0139] Step 402, 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, determine 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 movement state is stationary.

[0140] It should be noted that, in the embodiment of the present invention, the preset second value is greater than the first value, and the specific value of the second value can be adjusted later as the solution is optimized, wherein preferably, the second value can be 65%. After the second value is determined, the second toner amount threshold value = the target toner amount allowed by the commutator * the preset second value.

[0141] The actual carbon powder amount of the commutator is compared with the first carbon powder amount threshold and the second carbon powder amount threshold. 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, it is determined 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 movement state is stationary.

[0142] Step 403, 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 is in a stationary state, then determine the target rotation time of the motor based on the minimum rotation time of the motor, the interval time for executing the commutator cleaning method, and the time interval period.

[0143] Step 404: taking the maximum rotation speed of the motor as the target rotation speed of the motor.

[0144] It should be noted that, in an embodiment of the present invention, if the vehicle shutdown 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 vehicle is in a stationary state, then the target rotation time of the motor is determined based on the minimum rotation time of the motor, the interval time for executing 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 + (interval time for executing the commutator cleaning method - time interval period) / minimum rotation time of the motor].

[0145] At the same time, 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 to rotate according to the target rotation speed and the target rotation time of the motor by the electronic control unit, the interval time for executing the commutator cleaning method is set to 1.

[0147] Step 405, if the vehicle shutdown time is less than the first time value, or the vehicle's remaining power is less than the remaining power threshold, or the vehicle's motion state is non-stationary, the interval time for executing the commutator cleaning method is accumulated. During the process of accumulating the interval time for executing the commutator cleaning method, a first prompt message is synchronously sent to the vehicle's instrument, and the preset first prompt time is kept displayed.

[0148] It should be noted that, in an embodiment of the present invention, if the vehicle shutdown time is less than the first time value, or the vehicle's remaining power is less than the remaining power threshold, or the vehicle's motion state is non-stationary, the commutator cleaning method is stopped, and the interval time for executing the commutator cleaning method is accumulated based on the interval time for executing the current commutator cleaning method. In addition, in the process of accumulating the interval time for executing the commutator cleaning method, a first prompt message is synchronously sent to the vehicle's instrument, and the preset first prompt time is kept displayed. For example, the intelligent torque manager can send a message to the vehicle's instrument saying "The intelligent torque manager is self-repairing, please pay attention to parking and rest at night", and the prompt lasts for 1 minute.

[0149] The present invention obtains vehicle status information (including vehicle shutdown time, vehicle remaining power and vehicle movement status) and dynamically adjusts the rotation strategy of the motor according to the actual carbon powder amount of the commutator and the carbon powder amount threshold. It can not only effectively throw out the carbon powder on the commutator to avoid intelligent torque manager failure caused by carbon powder mixture adhering to the commutator slot, but also ensure that the commutator is cleaned at the best time to avoid cleaning the commutator when it affects the driving safety of the vehicle, thereby improving the user experience.

[0150] Further, in an embodiment of the present invention, if Figure 5 As shown, step 102 may further include the following steps:

[0151] Step 501 : determining a third toner amount threshold value according to a target toner 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 amount threshold and less than the third carbon powder amount threshold, determine whether the vehicle shutdown time is greater than or equal to the preset second time value, whether the vehicle's remaining power is greater than or equal to the remaining power threshold, and whether the vehicle's moving state is stationary, wherein the second time value is less than the first time value.

[0153] It should be noted that, in the embodiment of the present invention, the preset third value is greater than the second value, and the specific value of the third value can be adjusted later as the solution is optimized, wherein preferably, the third value can be 90%. After the third value is determined, the third toner amount threshold value = the target toner amount allowed by the commutator * the 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 shutdown time is greater than or equal to the preset second time value, whether the vehicle remaining power is greater than or equal to the remaining power threshold, and whether the vehicle movement state 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] Step 503, if the vehicle shutdown time is greater than or equal to the second time value, the vehicle remaining power is greater than or equal to the remaining power threshold, and the vehicle is in a stationary state, then determine the target rotation time of the motor based on the minimum rotation time of the motor, the interval time for executing the commutator cleaning method, and the time interval period.

[0156] Step 504: The maximum rotation speed of the motor is used as the target rotation speed of the motor.

[0157] It should be noted that, in an embodiment of the present invention, if the vehicle's ignition off time is greater than or equal to the second time value, the vehicle's remaining power is greater than or equal to the remaining power threshold, and the vehicle's moving state is stationary, then the target rotation time of the motor is determined based on the minimum rotation time of the motor, the interval time for executing 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 for executing the commutator cleaning method - the time interval period) / the minimum rotation time of the motor].

[0158] At the same time, 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 rotate according to the target rotation speed and the target rotation time of the motor by the electronic control unit, the interval time for executing the commutator cleaning method is set to 1.

[0160] Step 505, if the vehicle shutdown time is less than the second time value, or the vehicle remaining power is less than the remaining power threshold, or the vehicle is in a non-stationary state, the interval time for executing the commutator cleaning method is accumulated. During the process of accumulating the interval time for executing the commutator cleaning method, a second prompt message is synchronously sent to the instrument, and the 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 an embodiment of the present invention, if the vehicle shutdown time is less than the second time value, or the vehicle's remaining power is less than the remaining power threshold, or the vehicle's motion state is a non-stationary state, the commutator cleaning method is stopped, and the interval time for executing the commutator cleaning method is accumulated based on the interval time for executing the current commutator cleaning method. In addition, in the process of accumulating the interval time for executing the commutator cleaning method, a second prompt message is synchronously sent to the vehicle's instrument, and the preset second prompt time is displayed, wherein the second prompt time is greater than the first prompt time. For example, the intelligent torque manager can send a message to the vehicle's instrument that "the intelligent torque manager needs to repair itself, please stop and rest", and the prompt lasts for 3 minutes.

[0162] The present invention obtains vehicle status information (including vehicle shutdown time, vehicle remaining power and vehicle movement status) and dynamically adjusts the rotation strategy of the motor according to the actual carbon powder amount of the commutator and the carbon powder amount threshold. It can not only effectively throw out the carbon powder on the commutator to avoid intelligent torque manager failure caused by carbon powder mixture adhering to the commutator slot, but also ensure that the commutator is cleaned at the best time to avoid cleaning the commutator when it affects the driving safety of the vehicle, thereby improving the user experience.

[0163] Further, in an embodiment of the present invention, if Figure 6 As shown, step 102 may further include the following steps:

[0164] Step 601: If the actual carbon powder amount of the commutator is greater than or equal to a third carbon powder amount threshold, it is determined whether the vehicle movement state is a stationary state or a straight-moving state.

[0165] Step 602: If the vehicle is in a stationary state or a straight-moving state, a target rotation time of the motor is determined according to the minimum rotation time of the motor, the interval time for executing the commutator cleaning method, and the time interval period.

[0166] Step 603: taking the maximum rotation speed of the motor as the target rotation speed of the motor.

[0167] It should be noted that, in the embodiment of the present invention, if the actual carbon powder amount of the commutator is greater than or equal to the third carbon powder amount threshold, it is determined whether the vehicle movement state is a stationary state or a straight-moving state. If the vehicle movement state is a stationary state or a straight-moving 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 + (interval time of the commutator cleaning method - time interval period) / minimum rotation time of the motor].

[0168] At the same time, the maximum rotation speed of the motor is taken as the target rotation speed of the motor.

[0169] In addition, after the motor is controlled to rotate according to the target rotation speed and the target rotation time of the motor by the electronic control unit, the interval time for executing the commutator cleaning method is set to 1.

[0170] Step 604, if the vehicle's motion state is not a stationary state or a straight-ahead state, stop executing the commutator cleaning method until the vehicle's motion state is a stationary state or a straight-ahead state, and continue to execute the commutator cleaning method. During the process of continuing to execute the commutator cleaning method, synchronously send a third prompt message to the instrument until the commutator cleaning method is completed.

[0171] It should be noted that, in the embodiment of the present invention, if the vehicle is in a non-stationary state or non-straight-moving state, the commutator cleaning method is stopped until the vehicle is in a stationary state or straight-moving state, and the commutator cleaning method is continued. During the process of continuing to execute the commutator cleaning method, a third prompt message is synchronously sent to the instrument until the commutator cleaning method is completed. For example, the intelligent torque manager can send a message to the vehicle's instrument that "the intelligent torque manager is self-repairing, please stop the vehicle", and the prompt continues until the commutator cleaning method is completed.

[0172] The present invention obtains vehicle status information (including vehicle shutdown time, vehicle remaining power and vehicle movement status) and dynamically adjusts the rotation strategy of the motor according to the actual carbon powder amount of the commutator and the carbon powder amount threshold. It can not only effectively throw out the carbon powder on the commutator to avoid intelligent torque manager failure caused by carbon powder mixture adhering to the commutator slot, but also ensure that the commutator is cleaned at the best time to avoid cleaning the commutator when it affects the driving safety of the vehicle, thereby improving the user experience.

[0173] The second embodiment of the present invention relates to a commutator cleaning device, the device block diagram of which is as follows: Figure 7 As shown, including:

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

[0175] A motor rotation strategy determination module 702, for determining a motor rotation strategy according to a comparison result between a target carbon powder amount allowed by the commutator and an actual carbon powder amount of the commutator, and based on vehicle state information;

[0176] The commutator cleaning module 703 is used to control the motor to rotate according to the motor's rotation strategy through the electronic control unit, so that the commutator rotates and the actual amount of toner is thrown out.

[0177] Optionally, the data acquisition module includes:

[0178] The submodule for obtaining the target carbon powder amount allowed by the commutator is used to repeatedly execute the steps of increasing the carbon powder amount in the commutator, obtaining the current of the commutator, and judging whether the current of the commutator is abnormal, until the current of the commutator is abnormal, obtaining the carbon powder amount in the commutator, and using the carbon powder amount in the commutator as the target carbon powder amount allowed by the commutator.

[0179] Optionally, the data acquisition module includes:

[0180] The motor rated rotation speed acquisition submodule is used to acquire the rated rotation speed of the motor;

[0181] The motor control submodule is used to control the motor to rotate according to the rated rotation speed through the electronic control unit;

[0182] The submodule for obtaining the amount of carbon powder per unit time is used to obtain the amount of carbon powder generated by the friction between the brush and the commutator per unit time when the motor is in a rotating state, and to use the amount of carbon powder generated by the friction between the brush and the commutator per unit time as the actual amount of carbon powder generated per unit time;

[0183] The submodule for determining the actual carbon powder amount of the commutator is used to determine the actual carbon powder amount of the commutator based on the interval time of the execution of the commutator cleaning method, the actual amount of carbon powder generated per unit time and the preset time interval period, wherein the interval time of the execution of the commutator cleaning method is determined based on the current time and the time when the commutator cleaning method was last executed.

[0184] Optionally, the motor rotation strategy determination module includes:

[0185] The vehicle status information acquisition submodule is used to acquire the vehicle status information, wherein the vehicle status information includes the vehicle shutdown time, the vehicle remaining power and the vehicle movement status;

[0186] A first toner amount threshold determination submodule, used for determining a first toner amount threshold according to a target toner amount allowed by the commutator and a preset first value;

[0187] A first vehicle state judgment submodule is used to judge whether the vehicle shutdown 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 movement state is a stationary state if the actual carbon powder amount of the commutator is greater than or equal to 0 and less than a first carbon powder amount threshold;

[0188] A motor minimum rotation time determination submodule, for determining the minimum rotation time of the motor according to a target carbon powder amount allowed by the commutator and a maximum rotation speed of the motor if the vehicle shutdown time is greater than or equal to a first time value, the vehicle remaining power is greater than or equal to a remaining power threshold, and the vehicle motion state is a stationary state;

[0189] A first motor target rotation speed determination submodule, configured to use a pre-acquired maximum rotation speed of the motor as a target rotation speed of the motor;

[0190] A first motor target rotation time determination submodule, configured to use the minimum rotation time of the motor as the target rotation time of the motor;

[0191] The first interval time accumulation module is used 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 movement state is non-stationary.

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

[0193] A second toner quantity threshold determination submodule, configured to determine a second toner quantity threshold according to a target toner quantity allowed by the commutator and a preset second value, wherein the second value is greater than the first value;

[0194] A second vehicle state judgment submodule is used 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 movement state is stationary 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] A second motor target rotation time determination submodule, for determining the target rotation time of the motor according to the minimum rotation time of the motor, the interval time for executing 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 stationary;

[0196] A second motor target rotation speed determination submodule, configured to use the maximum rotation speed of the motor as the target rotation speed of the motor;

[0197] The first instrument prompt submodule 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 remaining power of the vehicle is less than the remaining power threshold, or the vehicle is in a non-stationary state. During the process of accumulating the interval time for executing the commutator cleaning method, a first prompt message is synchronously sent to the vehicle's instrument and the preset first prompt time is kept displayed.

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

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

[0200] A third vehicle state judgment submodule is used to judge whether the vehicle shutdown time is greater than or equal to a preset second time value, whether the vehicle remaining power is greater than or equal to the remaining power threshold, and whether the vehicle movement state is a 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 value is less than the first time value;

[0201] A third motor target rotation time determination submodule is used to determine the target rotation time of the motor according to the minimum rotation time of the motor, the interval time for executing the commutator cleaning method, and the time interval period if the vehicle shutdown 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 vehicle motion state is stationary;

[0202] A third motor target rotation speed determination submodule, configured to use the maximum rotation speed of the motor as the target rotation speed of the motor;

[0203] The second instrument prompt submodule is used to accumulate the interval time of the commutator cleaning method if the vehicle shutdown time is less than the second time value, or the remaining power of the vehicle is less than the remaining power threshold, or the vehicle is in a non-stationary state. During the process of accumulating the interval time of the commutator cleaning method, a second prompt message is synchronously sent to the instrument and the preset second prompt time is kept displayed, wherein the second prompt time is greater than the first prompt time.

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

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

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

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

[0208] The third instrument prompt submodule is used to stop executing the commutator cleaning method if the vehicle's motion state is not a stationary state or a straight-ahead state, and continue to execute the commutator cleaning method until the vehicle's motion state is a stationary state or a straight-ahead state. During the process of continuing to execute the commutator cleaning method, a third prompt message is synchronously sent to the instrument until the commutator cleaning method is completed.

[0209] As for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0210] A third embodiment of the present invention relates to a storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the steps of the commutator cleaning method as described in the first aspect.

[0211] A fourth embodiment of the present invention provides a vehicle, the vehicle comprising the commutator cleaning device according to the second aspect of the present invention.

[0212] Those skilled in the art will appreciate that the modules in the devices in the embodiments may be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or components in the embodiments may be combined into one module or unit or component, and in addition they may be divided into a plurality of submodules or subunits or subcomponents. Except that at least some of such features and / or processes or units are mutually exclusive, all features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed in this manner may be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature providing the same, equivalent or similar purpose.

[0213] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0214] It should be noted that the above embodiments illustrate the present invention rather than limit it, and that those skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets shall not be construed as a limitation on the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "one" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention may be implemented by means of hardware comprising a number of different elements and by means of a suitably programmed computer. In a unit claim enumerating a number of devices, several of these devices may be embodied by the same hardware item. The use of the words first, second, and third, etc., does not indicate any order. These words may be interpreted as names.

Claims

1. A commutator cleaning method, characterized in that: Applied to an intelligent torque manager, the intelligent torque manager includes an electronic control unit and a motor, the motor includes a commutator, and the method includes: Acquire the target carbon powder amount allowed by the commutator and the actual carbon powder amount of the commutator; determining a rotation strategy of the motor according to a comparison result between a target carbon powder amount allowed by the commutator and an actual carbon powder amount of the commutator and based on vehicle state information; The electronic control unit controls the motor to rotate according to the rotation strategy of the motor, so that the commutator rotates and the actual amount of toner is thrown out.

2. The method according to claim 1, characterized in that The obtaining of the target carbon powder amount allowed by the commutator comprises: Repeat the steps of increasing the amount of carbon powder 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, obtaining the amount of carbon powder in the commutator, and using the amount of carbon powder in the commutator as the target amount of carbon powder allowed by the commutator.

3. The method according to claim 1, characterized in that The motor includes brushes; The obtaining of the actual carbon powder amount of the commutator comprises: Obtaining the rated rotation speed of the motor; Controlling the motor to rotate according to the rated rotation speed by the electronic control unit; 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 used as the actual amount of carbon powder generated per unit time; The actual amount of carbon powder in the commutator is determined based on the interval time of executing the commutator cleaning method, the actual amount of carbon powder generated per unit time and the preset time interval period, wherein the interval time of executing the commutator cleaning method is determined based on the current time and the time when the commutator cleaning method was last executed.

4. The method according to claim 1, characterized in that: The determining of 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 comprises: Acquiring vehicle status information, wherein the vehicle status information includes vehicle shutdown time, vehicle remaining power, and vehicle movement status; Determining a first toner amount threshold value according to a target toner amount allowed by the commutator and a 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, it is determined whether the vehicle shutdown 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 vehicle movement state is a stationary state; 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, determining 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; using the pre-acquired maximum rotation speed of the motor as the target rotation speed of the motor; taking the minimum rotation time of the motor as the target rotation time of the motor; 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 is in a non-stationary state, the interval time for executing the commutator cleaning method is accumulated.

5. The method according to claim 4, characterized in that The determining of 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 comprises: Determining a second toner amount threshold value 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; 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 determine 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 movement state is the stationary state; 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, then according to the minimum rotation time of the motor, the interval time of executing the commutator cleaning method and the time interval period, determine the target rotation time of the motor; using the maximum rotation speed of the motor as the target rotation speed of the motor; If the vehicle shutdown time is less than the first time value, or the remaining power of the vehicle is less than the remaining power threshold, or the vehicle's motion state is the non-stationary state, the interval time for executing the commutator cleaning method is accumulated. During the process of accumulating the interval time for executing the commutator cleaning method, a first prompt message is synchronously sent to the vehicle's instrument, and the preset first prompt time is kept displayed.

6. The method according to claim 5, characterized in that The determining of 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 comprises: Determining a third toner amount threshold value according to the target toner amount allowed by the commutator and a preset third value, 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, it is determined whether the vehicle shutdown time is greater than or equal to a preset second time value, whether the vehicle remaining power is greater than or equal to the remaining 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 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 executing the commutator cleaning method, and the time interval period; using the maximum rotation speed of the motor as the target rotation speed of the motor; If the vehicle shutdown time is less than the second time value, or the vehicle remaining power is less than the remaining power threshold, or the vehicle movement state is the non-stationary state, the interval time for executing the commutator cleaning method is accumulated. In the process of accumulating the interval time for executing the commutator cleaning method, a second prompt message is synchronously sent to the instrument, and the preset second prompt time is kept displayed, wherein the second prompt time is greater than the first prompt time.

7. The method according to claim 3, characterized in that The determining of 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 comprises: If the actual carbon powder amount of the commutator is greater than or equal to the third carbon powder amount threshold, determining whether the vehicle movement state is the stationary state or the straight-moving state; If the vehicle motion state is the stationary state or the straight-ahead state, determining a target rotation time of the motor according to the minimum rotation time of the motor, the interval time for executing the commutator cleaning method, and the time interval period; using the maximum rotation speed of the motor as the target rotation speed of the motor; If the vehicle's motion state is the non-stationary state or the non-straight-ahead state, the commutator cleaning method is stopped until the vehicle's motion state is the stationary state or the straight-ahead state, and the commutator cleaning method is continued to be executed. During the process of continuing to execute the commutator cleaning method, a third prompt message is synchronously sent to the instrument until the commutator cleaning method is completed.

8. A commutator cleaning device, characterized in that: The device comprises: A data acquisition module, used for acquiring a target carbon powder amount allowed by the commutator and an actual carbon powder amount of the commutator; a motor rotation strategy determination module, configured to determine a rotation strategy of the motor according to a comparison result between a target carbon powder amount allowed by the commutator and an actual carbon powder amount of the commutator, and based on vehicle state information; The commutator cleaning module is used to control the motor to rotate according to the rotation strategy of the motor through the electronic control unit, so that the commutator rotates and the actual amount of carbon powder is thrown out.

9. A storage medium, characterized in that: The storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the commutator cleaning method according to any one of claims 1 to 7 are implemented.

10. A vehicle, characterized in that: Comprising the commutator cleaning device as claimed in claim 8.

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