Separation control method, device and equipment of electromagnetic clutch and medium

Abstract

The embodiment of the invention relates to the technical field of vehicle electromagnetic clutches, and discloses a separation control method, device and equipment of an electromagnetic clutch and a medium. The method comprises the steps that when the electromagnetic clutch is in rigid connection, parameter information of a vehicle is obtained; judging whether an engine flameout risk exists or not according to the parameter information; and if the engine flameout risk exists, the electromagnetic clutch is controlled to be separated from the engine. According to the technical scheme, after the electromagnetic clutch is rigidly connected with the engine, whether the engine flameout risk exists in the vehicle or not is determined according to the real-time parameter information of the vehicle, and if yes, the electromagnetic clutch is controlled to be separated from the engine immediately; the flameout risk of the engine can be recognized in advance through the parameter information, and the electromagnetic clutch is immediately controlled to be separated from the engine, so that the separation operation time is shortened, the separation operation efficiency and timeliness are improved, the engine is prevented from being dragged down, and the safety and reliability of a vehicle are guaranteed on the basis of meeting the driving requirements of customers.

Description

Technical Field

[0001] Embodiments of the present invention relate to the technical field of vehicle electromagnetic clutches, and in particular to a separation control method, device, equipment and medium for an electromagnetic clutch. Background Art

[0002] PHEV (plug in hybrid electric vehicle) consists of vehicle controller, engine and its control unit, generator and its control unit, drive motor and its control unit, power battery and its management system, electromagnetic coil clutch and its control unit, etc. In parallel drive mode, the vehicle is driven by the drive motor and the engine. At this time, the flywheel end of the engine is meshed with the drive shaft of the wheel through the electromagnetic clutch to drive the wheel to rotate.

[0003] When the electromagnetic clutch and the wheel drive shaft are in the above rigid connection structure, the electromagnetic clutch is often prone to reverse the engine due to the change in the rotation speed of the wheel, causing the engine to stall. In order to separate the electromagnetic clutch from the engine, the commonly used method is: when the vehicle is decelerating suddenly, the corresponding torque required for the engine and the electromagnetic clutch to separate is calculated, and after the engine is controlled to rotate according to the corresponding torque, the two cogwheels of the electromagnetic clutch are driven to separate through the spring of the electromagnetic clutch.

[0004] However, the commonly used methods currently have the following technical problems: during rapid deceleration, the rotation speed at the wheel end will drop rapidly, and the rapid drop will cause the electromagnetic clutch to drag down the engine in a very short time. Therefore, the engine is often restarted after being shut down and then separated. Not only is the separation control operation delayed, but the control accuracy is also low, which makes it difficult to meet the user's driving needs. Summary of the invention

[0005] In view of the above problems, embodiments of the present invention provide a separation control method, device, equipment and medium for an electromagnetic clutch, which are used to solve the technical problems of delayed separation control operation and low control accuracy in the prior art.

[0006] According to one aspect of an embodiment of the present invention, a separation control method of an electromagnetic clutch is provided, the method comprising:

[0007] When the electromagnetic clutch is in a rigid connection, obtaining parameter information of the vehicle, the parameter information including one or more combinations of the following: output shaft speed of the electromagnetic clutch, operating parameters of the engine and the electromagnetic clutch, brake pedal signal, and active braking signal sent by the intelligent driving system;

[0008] Determining whether there is a risk of engine stalling based on the parameter information;

[0009] If there is a risk of engine stalling, the electromagnetic clutch is controlled to separate from the engine.

[0010] In one embodiment, the present invention can obtain parameter information of the vehicle in real time after the electromagnetic clutch is rigidly connected to the engine, and determine whether the vehicle has a risk of engine stalling based on the parameter information. If there is a risk of engine stalling, the electromagnetic clutch is immediately controlled to separate from the engine; the risk of engine stalling can be identified in advance through the parameter information, and the electromagnetic clutch is immediately controlled to separate from the engine when there is a risk, so as to greatly shorten the time of the separation operation, improve the efficiency and timeliness of the separation operation, and thus avoid the engine being dragged down, thereby ensuring the safety and reliability of the vehicle on the basis of meeting the driving needs of customers.

[0011] According to another aspect of an embodiment of the present invention, there is provided a separation control device for an electromagnetic clutch, comprising:

[0012] An information acquisition module is used to acquire parameter information of the vehicle when the electromagnetic clutch is in a rigid connection, wherein the parameter information includes one or more combinations of the following: output shaft speed of the electromagnetic clutch, operating parameters of the engine and the electromagnetic clutch, brake pedal signal, and active braking signal sent by the intelligent driving system;

[0013] A risk determination module, used for determining whether there is a risk of engine stalling according to the parameter information;

[0014] The control separation module is used to control the electromagnetic clutch to separate from the engine if there is a risk of engine stalling.

[0015] According to another aspect of an embodiment of the present invention, there is provided a separation control device for an electromagnetic clutch, comprising: a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface communicate with each other through the communication bus;

[0016] The memory is used to store at least one executable instruction, and the executable instruction enables the processor to execute the steps of the electromagnetic clutch separation control method provided by the above embodiment.

[0017] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided, wherein the storage medium stores at least one executable instruction, and the executable instruction enables the separation control device / apparatus of the electromagnetic clutch to perform the following operations:

[0018] When the electromagnetic clutch is in a rigid connection, obtaining parameter information of the vehicle, the parameter information including one or more combinations of the following: output shaft speed of the electromagnetic clutch, operating parameters of the engine and the electromagnetic clutch, brake pedal signal, and active braking signal sent by the intelligent driving system;

[0019] Determining whether there is a risk of engine stalling based on the parameter information;

[0020] If there is a risk of engine stalling, the electromagnetic clutch is controlled to separate from the engine.

[0021] The embodiment of the present invention can obtain parameter information of the vehicle in real time after the electromagnetic clutch is rigidly connected to the engine, and determine whether the vehicle has a risk of engine stalling based on the parameter information. If there is a risk of engine stalling, the electromagnetic clutch is immediately controlled to separate from the engine; the risk of engine stalling can be identified in advance through the parameter information, and the electromagnetic clutch is immediately controlled to separate from the engine when the risk exists, so as to greatly shorten the time of the separation operation, improve the efficiency and timeliness of the separation operation, and thus avoid the engine being dragged down, thereby ensuring the safety and reliability of the vehicle on the basis of meeting the driving needs of customers.

[0022] The above description is only an overview of the technical solution of the embodiment of the present invention. In order to more clearly understand the technical means of the embodiment of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment 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

[0023] The accompanying drawings are only used to illustrate the embodiments and are not to be considered as limiting the present invention. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings. In the accompanying drawings:

[0024] Figure 1 A schematic flow chart of a first embodiment of a separation control method of an electromagnetic clutch provided by the present invention is shown;

[0025] Figure 2 A schematic diagram showing the structure of the electromagnetic clutch provided by the present invention in a rigid connection;

[0026] Figure 3 A schematic flow chart of a second embodiment of a separation control method of an electromagnetic clutch provided by the present invention is shown;

[0027] Figure 4 A schematic flow chart of a third embodiment of a separation control method of an electromagnetic clutch provided by the present invention is shown;

[0028] Figure 5 A schematic flow chart of a fourth embodiment of a separation control method of an electromagnetic clutch provided by the present invention is shown;

[0029] Figure 6 A schematic structural diagram of a first embodiment of a separation control device for an electromagnetic clutch provided by the present invention is shown;

[0030] Figure 7A structural schematic diagram of an embodiment of a separation control device of an electromagnetic clutch provided by the present invention is shown. DETAILED DESCRIPTION

[0031] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein.

[0032] Figure 1 The flowchart of the first embodiment of the electromagnetic clutch separation control method provided by the present invention is shown. The method is executed by the vehicle body area controller (VIU) of the vehicle. The vehicle body area controller integrates the traditional vehicle controller as the control core of the hybrid control system. Figure 1 As shown, the method comprises the following steps:

[0033] Step 110: When the electromagnetic clutch is in a rigid connection, obtain parameter information of the vehicle, wherein the parameter information includes one or more combinations of the following: output shaft speed of the electromagnetic clutch, operating parameters of the engine and the electromagnetic clutch, brake pedal signal, and active braking signal sent by the intelligent driving system.

[0034] Reference Figure 2 , showing a schematic structural diagram of the electromagnetic clutch provided by the present invention in a rigid connection.

[0035] In one embodiment, when the electromagnetic clutch is engaged, the flywheel end of the engine is connected to the electromagnetic clutch, and the electromagnetic clutch is then connected to the gear set of the reducer and the differential, and the gear set of the reducer and the differential is connected to the wheels through the transmission shaft, thereby realizing the rigid connection of the electromagnetic clutch, as shown in the following example. Figure 2 shown.

[0036] In this state, the vehicle's parameter information can be obtained through various sensors, and the parameter information may include the output shaft speed of the electromagnetic clutch, the operating parameters of the engine and the electromagnetic clutch, the brake pedal signal, and the active braking signal sent by the intelligent driving system.

[0037] Among them, the operating parameters of the engine and the electromagnetic clutch can be various real-time parameters of the engine and various real-time parameters of the electromagnetic clutch during the driving of the vehicle. The active braking signal sent by the intelligent driving system can be a signal generated by the intelligent driving system determining that the vehicle needs to brake through various detection information during the driving of the vehicle. The brake pedal signal can be a signal of the user using the brake pedal. For example, if the user steps on the brake pedal, the signal is 1, and if the user does not step on the brake pedal, the signal is 0.

[0038] By detecting various real-time parameter information, the vehicle's driving status and road conditions can be determined in real time, and then the risk of flameout can be assessed based on the various real-time driving status and road conditions. Once there is a risk of flameout, separation is performed immediately to improve the timeliness and operational efficiency of separation control.

[0039] Step 120: Determine whether there is a risk of engine stalling based on the parameter information.

[0040] In one embodiment, whether there is a risk of engine stalling can be determined based on the numerical value of the parameter information; whether there is a risk of engine stalling can also be determined based on the comparison result of the numerical value of the parameter information and a preset threshold value; a neural network or algorithm model can also perform risk probability calculation based on the parameter information to determine whether there is a risk of engine stalling; or other types of parameters can be calculated based on the parameter information, and then whether there is a risk of engine stalling can be determined based on the numerical values ​​of the other types of parameters.

[0041] Step 130: If there is a risk of engine stalling, the electromagnetic clutch is controlled to separate from the engine.

[0042] When it is assessed that the vehicle has a risk of engine stalling, the electromagnetic clutch can be immediately controlled to separate from the engine. The specific separation method can be to send a separation signal to the electromagnetic clutch to control the electromagnetic clutch to separate from the engine. The electromagnetic clutch can also be controlled to separate from the engine in a conventional manner.

[0043] After the separation is completed, the engine does not drive the wheels to move, and the vehicle has no power. In order to facilitate the user's driving, the vehicle is allowed to continue to move. As an example, the method may also include:

[0044] Step 140: Control the vehicle to switch to a series drive mode, so that the generator controls the motor to drive the vehicle.

[0045] After the electromagnetic clutch is controlled to separate from the engine, the electromagnetic clutch is in a disengaged state, and the engine does not directly drive the wheels. The vehicle's current driving mode can be converted to pure electric drive or series drive, at which time the engine can drive the generator to generate electricity and transmit the current to the drive motor, which then drives the vehicle.

[0046] It should be noted that if the vehicle's energy management module decides that the system should enter the series drive mode to achieve system optimization, it can also request the electromagnetic clutch to be separated from the engine to reduce the vehicle's energy consumption.

[0047] The present invention can obtain parameter information of the vehicle in real time after the electromagnetic clutch is rigidly connected to the engine, and determine whether the vehicle has a risk of engine stalling based on the parameter information. If there is a risk of engine stalling, the electromagnetic clutch is immediately controlled to separate from the engine; the engine stalling risk can be identified in advance through the parameter information, and the electromagnetic clutch is immediately controlled to separate from the engine when the risk exists, so as to greatly shorten the time of the separation operation, improve the efficiency and timeliness of the separation operation, and thus avoid the engine being dragged down, thereby ensuring the safety and reliability of the vehicle on the basis of meeting the driving needs of customers.

[0048] Figure 3 FIG. 2 is a flow chart showing a second embodiment of a separation control method of an electromagnetic clutch provided by the present invention, wherein the method is executed by a vehicle body area controller (VIU) of the vehicle. Figure 3 As shown, the method comprises the following steps:

[0049] Step 210: When the electromagnetic clutch is in a rigid connection, obtain parameter information of the vehicle, wherein the parameter information includes one or more combinations of the following: output shaft speed of the electromagnetic clutch, operating parameters of the engine and the electromagnetic clutch, brake pedal signal, and active braking signal sent by the intelligent driving system.

[0050] Among them, when the electromagnetic clutch is in a rigid connection, the operation method of obtaining the parameter information of the vehicle can refer to the analytical description of the above embodiment, and in order to avoid repetition, it will not be repeated here.

[0051] Step 220: When the parameter information is the output shaft speed of the electromagnetic clutch, the output shaft deceleration is calculated using the output shaft speed.

[0052] The output shaft deceleration can be calculated according to the following formula:

[0053]

[0054] Where a is the output shaft deceleration, v is the output shaft speed, and t is time.

[0055] Step 230: If the output shaft deceleration is less than a preset first calibration value, it is determined that there is a risk of engine stalling.

[0056] The preset first calibration value is a calibration value obtained by querying the real-time vehicle speed after acquiring the real-time vehicle speed.

[0057] In one operation mode, the preset first calibration value may be k1, which is obtained by looking up the following table based on the current vehicle speed or the real-time vehicle speed of the vehicle.

[0058] Speed 0 30 60 90 120 150 180 K1 -3500 -3380 -3150 -2990 -2870 -2870 -2870

[0059] Step 240: If the output shaft deceleration is greater than or equal to a preset first calibration value, it is determined that there is no risk of engine stalling.

[0060] If the output shaft deceleration is less than the preset first calibration value, it can be determined that the vehicle is at risk of engine stalling; conversely, if the output shaft deceleration is greater than or equal to the preset first calibration value, it can be determined that the vehicle is not at risk of engine stalling.

[0061] The magnitude of the output shaft deceleration can be used to identify in advance that the vehicle is in a rapid deceleration condition, and can determine that the vehicle is at risk of engine stalling, and subsequently control the electromagnetic clutch to separate from the engine in advance.

[0062] Step 250: If there is a risk of engine stalling, control the electromagnetic clutch to separate from the engine.

[0063] Among them, the operation method of controlling the electromagnetic clutch to separate from the engine when there is a risk of engine stalling can refer to the analytical description of the above embodiment, and will not be repeated here to avoid repetition.

[0064] The present invention can obtain the output shaft speed of the vehicle's electromagnetic clutch in real time after the electromagnetic clutch is rigidly connected to the engine, calculate the output shaft deceleration according to the output shaft speed of the electromagnetic clutch, determine that there is a risk of engine stalling when the output shaft deceleration is less than a preset first calibration value, and immediately control the electromagnetic clutch to separate from the engine; the engine stalling risk can be accurately determined by the size of the output shaft deceleration, which can effectively improve the recognition accuracy of the stalling risk, and subsequently improve the efficiency and timeliness of the separation operation.

[0065] Figure 4 FIG. 2 is a flow chart of a third embodiment of a method for controlling the separation of an electromagnetic clutch provided by the present invention, wherein the method is executed by a vehicle body area controller (VIU) of the vehicle. Figure 4 As shown, the method comprises the following steps:

[0066] Step 310: When the electromagnetic clutch is in a rigid connection, obtain parameter information of the vehicle, wherein the parameter information includes one or more combinations of the following: output shaft speed of the electromagnetic clutch, operating parameters of the engine and the electromagnetic clutch, brake pedal signal, and active braking signal sent by the intelligent driving system.

[0067] Among them, when the electromagnetic clutch is in a rigid connection, the operation method of obtaining the parameter information of the vehicle can refer to the analytical description of the above embodiment, and in order to avoid repetition, it will not be repeated here.

[0068] Step 320: When the parameter information is the brake pedal signal, the output shaft speed of the electromagnetic clutch, the engine speed, and the end speed ratio from the engine to the input shaft of the electromagnetic clutch, calculate the rotational speed difference between the two ends of the input shaft and the output shaft of the clutch according to the engine speed, the end speed ratio, and the output shaft speed.

[0069] Among them, according to the following formula, calculate the rotational speed difference between the two ends of the input shaft and the output shaft of the clutch:

[0070] Δv = v eng *i - v;

[0071] Among them, Δv is the rotational speed difference, i is the end speed ratio from the engine to the input shaft of the electromagnetic clutch, v is the output shaft speed, and v eng is the engine speed.

[0072] Step 330: If the absolute value of the rotational speed difference is less than the preset second calibration value and the brake pedal signal is that the brake pedal is depressed, it is determined that there is a risk of engine stalling.

[0073] Among them, the preset second calibration value is a calibration value obtained by querying according to the engine speed.

[0074] In an operation mode, the preset second calibration value can be k2, and it can be obtained by looking up the following table based on the current engine speed of the vehicle.

[0075] <![CDATA[v eng ]]> 1000 2000 3000 4000 5000 6000 7000 K2 50 58 65 77 105 105 105

[0076] Step 340: If the absolute value of the rotational speed difference is greater than or equal to the preset second calibration value and the engine speed is less than the preset speed value, it is determined that there is a risk of engine stalling.

[0077] Step 350: If the absolute value of the rotational speed difference is greater than or equal to the preset second calibration value and the engine speed is greater than the preset speed value, it is determined that there is no risk of engine stalling.

[0078] Specifically, if the absolute value of the rotational speed difference is less than the preset second calibration value and the brake pedal signal is that the brake pedal is depressed, that is, when |Δv| < k2 and the brake pedal is depressed, it is determined that there is a risk of engine stalling.

[0079] If the absolute value of the rotational speed difference is greater than or equal to the preset second calibration value and the engine speed is less than the preset speed value. Among them, the preset speed value can be the minimum engine anti-stall speed (assuming 980 rpm). When |Δv| < k2 and the engine speed is lower than 980 rpm, it is determined that there is a risk of engine stalling.

[0080] Similarly, if the absolute value of the speed difference is greater than or equal to a preset second calibration value and the engine speed is greater than a preset speed value, it is determined that there is no risk of engine stalling.

[0081] The size of the speed difference can be used to identify in advance that the vehicle is in a rapid deceleration condition, and can also determine that the vehicle is at risk of engine stalling, and subsequently control the electromagnetic clutch to separate from the engine in advance.

[0082] Moreover, the present invention is also provided with an anti-stall protection measure, that is, when the speed difference is large but the engine speed is lower than the critical value, it means that the engine may stall immediately, and the risk of engine stalling is determined, and the electromagnetic clutch is immediately requested to be disengaged subsequently.

[0083] Step 360: If there is a risk of engine stalling, control the electromagnetic clutch to separate from the engine.

[0084] Among them, the operation method of controlling the electromagnetic clutch to separate from the engine when there is a risk of engine stalling can refer to the analytical description of the above embodiment, and will not be repeated here to avoid repetition.

[0085] The present invention can obtain the engine speed, terminal speed ratio and output shaft speed of the vehicle's electromagnetic clutch in real time and calculate the speed difference after the electromagnetic clutch is rigidly connected to the engine, determine that the vehicle has an engine stall risk according to the size of the speed difference, the signal of the brake pedal and the engine speed, and immediately control the electromagnetic clutch to separate from the engine; the engine stall risk can be accurately determined by the size of the speed difference, the signal of the brake pedal and the size of the engine speed, which can effectively improve the recognition accuracy of the stall risk, and subsequently improve the efficiency and timeliness of the separation operation.

[0086] Figure 5 FIG. 4 is a flow chart showing a fourth embodiment of a method for controlling the separation of an electromagnetic clutch provided by the present invention, the method being executed by a vehicle body area controller (VIU) of the vehicle. Figure 5 As shown, the method comprises the following steps:

[0087] Step 410: When the electromagnetic clutch is in a rigid connection, obtain parameter information of the vehicle, wherein the parameter information includes one or more combinations of the following: output shaft speed of the electromagnetic clutch, operating parameters of the engine and the electromagnetic clutch, brake pedal signal, and active braking signal sent by the intelligent driving system.

[0088] Among them, when the electromagnetic clutch is in a rigid connection, the operation method of obtaining the parameter information of the vehicle can refer to the analytical description of the above embodiment, and in order to avoid repetition, it will not be repeated here.

[0089] Step 420: When the parameter information is an active braking signal sent by the intelligent driving system, it is determined that there is a risk of engine stalling;

[0090] The active braking signal is a flag generated after the vehicle's radar and camera detect the driving environment information in real time to determine that the vehicle is at risk of collision and perform active emergency braking.

[0091] Specifically, the vehicle can detect the driving environment in real time through radar and cameras, and transmit the driving environment to the vehicle's intelligent driving system. The intelligent driving system can determine whether the vehicle will collide based on the driving environment. If it is determined that the vehicle is about to collide, the intelligent driving system will perform active emergency braking. At this time, active emergency braking will send a rapid deceleration flag through the CAN signal. When the rapid deceleration flag is received, the vehicle may cause the electromagnetic clutch to drag down the engine in a very short time during the rapid deceleration process due to the rapid drop in wheel speed. It can be determined that there is a risk of engine stalling.

[0092] Through the use of algorithms by the intelligent driving system, it can be identified in advance that the vehicle is in a rapid deceleration condition, and it can also be determined that the vehicle is at risk of engine stalling, and the electromagnetic clutch can be controlled to separate from the engine in advance.

[0093] Step 430: If there is a risk of engine stalling, the electromagnetic clutch is controlled to separate from the engine.

[0094] Among them, the operation method of controlling the electromagnetic clutch to separate from the engine when there is a risk of engine stalling can refer to the analytical description of the above embodiment, and will not be repeated here to avoid repetition.

[0095] The present invention can obtain the active braking signal sent by the vehicle's intelligent driving system in real time after the electromagnetic clutch is rigidly connected to the engine, determine that the vehicle is at risk of engine stalling based on the active braking signal, and immediately control the electromagnetic clutch to separate from the engine; the active braking signal identified by the algorithm can accurately determine the engine stalling risk, effectively improve the accuracy of identifying the stalling risk, and subsequently improve the efficiency and timeliness of the separation operation.

[0096] Figure 6 FIG. 2 is a schematic structural diagram of a first embodiment of a separation control device for an electromagnetic clutch provided by the present invention. Figure 6 As shown, the device 500 includes: an information acquisition module 510, a risk determination module 520 and a control separation module 530.

[0097] An information acquisition module is used to acquire parameter information of the vehicle when the electromagnetic clutch is in a rigid connection, wherein the parameter information includes one or more combinations of the following: output shaft speed of the electromagnetic clutch, operating parameters of the engine and the electromagnetic clutch, brake pedal signal, and active braking signal sent by the intelligent driving system;

[0098] A risk determination module, used for determining whether there is a risk of engine stalling according to the parameter information;

[0099] The control separation module is used to control the electromagnetic clutch to separate from the engine if there is a risk of engine stalling.

[0100] In an optional manner, judging whether there is a risk of engine stalling according to the parameter information includes:

[0101] When the parameter information is the output shaft speed of the electromagnetic clutch, the output shaft deceleration is calculated using the output shaft speed;

[0102] If the output shaft deceleration is less than a preset first calibration value, it is determined that there is a risk of engine stalling;

[0103] If the output shaft deceleration is greater than or equal to a preset first calibration value, it is determined that there is no risk of engine stalling;

[0104] The preset first calibration value is a calibration value obtained by querying the real-time vehicle speed after acquiring the real-time vehicle speed.

[0105] In an optional manner, calculating the output shaft deceleration by using the output shaft speed includes:

[0106] Calculate the output shaft deceleration according to the following formula:

[0107]

[0108] Where a is the output shaft deceleration, v is the output shaft speed, and t is time.

[0109] In an optional manner, judging whether there is a risk of engine stalling according to the parameter information includes:

[0110] When the parameter information is the brake pedal signal, the output shaft speed of the electromagnetic clutch, the engine speed and the terminal speed ratio from the engine to the input shaft of the electromagnetic clutch, the speed difference between the input shaft and the output shaft of the clutch is calculated based on the engine speed, the terminal speed ratio and the output shaft speed;

[0111] If the absolute value of the speed difference is less than a preset second calibration value and the brake pedal signal indicates that the brake pedal is depressed, it is determined that there is a risk of engine stalling;

[0112] If the absolute value of the speed difference is greater than or equal to a preset second calibration value and the engine speed is less than a preset speed value, it is determined that there is a risk of engine stalling;

[0113] If the absolute value of the speed difference is greater than or equal to a preset second calibration value and the engine speed is greater than a preset speed value, it is determined that there is no risk of engine stalling;

[0114] The preset second calibration value is a calibration value obtained by querying the engine speed.

[0115] In an optional manner, the speed difference between the input shaft and the output shaft of the clutch is calculated based on the engine speed, the terminal speed ratio and the output shaft speed, including:

[0116] According to the following formula, calculate the speed difference between the input shaft and the output shaft of the clutch:

[0117] Δv=v eng *iv;

[0118] Among them, Δv is the speed difference, i is the end speed ratio from the engine to the input shaft of the electromagnetic clutch, v is the output shaft speed, v eng is the engine speed.

[0119] In an optional manner, judging whether there is a risk of engine stalling according to the parameter information includes:

[0120] When the parameter information is an active braking signal sent by the intelligent driving system, it is determined that there is a risk of engine stalling;

[0121] The active braking signal is a flag generated after the vehicle's radar and camera detect the driving environment information in real time to determine that the vehicle is at risk of collision and perform active emergency braking.

[0122] In an optional manner, the device further includes:

[0123] The series drive module is used to control the vehicle to switch into a series drive mode so that the generator controls the motor to drive the vehicle.

[0124] Figure 7 A schematic structural diagram of an embodiment of a separation control device for an electromagnetic clutch provided by the present invention is shown. The specific embodiment of the present invention does not limit the specific implementation of the separation control device for the electromagnetic clutch.

[0125] like Figure 7 As shown, the separation control device of the electromagnetic clutch may include: a processor (processor) 602, a communication interface (Communications Interface) 604, a memory (memory) 606, and a communication bus 608.

[0126] The processor 602, the communication interface 604, and the memory 606 communicate with each other via a communication bus 608. The communication interface 604 is used to communicate with other devices such as a client or other server network elements. The processor 602 is used to execute a program 610, which can specifically execute the relevant steps in the above-mentioned separation control method embodiment for an electromagnetic clutch.

[0127] Specifically, the program 610 may include program code including computer executable instructions.

[0128] The processor 602 may be a central processing unit (CPU), or an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiment of the present invention. The one or more processors included in the electromagnetic clutch separation control device may be processors of the same type, such as one or more CPUs; or processors of different types, such as one or more CPUs and one or more ASICs.

[0129] The memory 606 is used to store the program 610. The memory 606 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0130] Program 610 can be specifically called by processor 602 to enable the separation control device of the electromagnetic clutch to perform the following operations:

[0131] When the electromagnetic clutch is in a rigid connection, obtaining parameter information of the vehicle, the parameter information including one or more combinations of the following: output shaft speed of the electromagnetic clutch, operating parameters of the engine and the electromagnetic clutch, brake pedal signal, and active braking signal sent by the intelligent driving system;

[0132] Determining whether there is a risk of engine stalling based on the parameter information;

[0133] If there is a risk of engine stalling, the electromagnetic clutch is controlled to separate from the engine.

[0134] In an optional manner, judging whether there is a risk of engine stalling according to the parameter information includes:

[0135] When the parameter information is the output shaft speed of the electromagnetic clutch, the output shaft deceleration is calculated using the output shaft speed;

[0136] If the output shaft deceleration is less than a preset first calibration value, it is determined that there is a risk of engine stalling;

[0137] If the output shaft deceleration is greater than or equal to a preset first calibration value, it is determined that there is no risk of engine stalling;

[0138] The preset first calibration value is a calibration value obtained by querying the real-time vehicle speed after acquiring the real-time vehicle speed.

[0139] In an optional manner, calculating the output shaft deceleration by using the output shaft speed includes:

[0140] Calculate the output shaft deceleration according to the following formula:

[0141]

[0142] Where a is the output shaft deceleration, v is the output shaft speed, and t is time.

[0143] In an optional manner, judging whether there is a risk of engine stalling according to the parameter information includes:

[0144] When the parameter information is the brake pedal signal, the output shaft speed of the electromagnetic clutch, the engine speed and the terminal speed ratio from the engine to the input shaft of the electromagnetic clutch, the speed difference between the input shaft and the output shaft of the clutch is calculated based on the engine speed, the terminal speed ratio and the output shaft speed;

[0145] If the absolute value of the speed difference is less than a preset second calibration value and the brake pedal signal indicates that the brake pedal is depressed, it is determined that there is a risk of engine stalling;

[0146] If the absolute value of the speed difference is greater than or equal to a preset second calibration value and the engine speed is less than a preset speed value, it is determined that there is a risk of engine stalling;

[0147] If the absolute value of the speed difference is greater than or equal to a preset second calibration value and the engine speed is greater than a preset speed value, it is determined that there is no risk of engine stalling;

[0148] The preset second calibration value is a calibration value obtained by querying the engine speed.

[0149] In an optional manner, the speed difference between the input shaft and the output shaft of the clutch is calculated based on the engine speed, the terminal speed ratio and the output shaft speed, including:

[0150] According to the following formula, calculate the speed difference between the input shaft and the output shaft of the clutch:

[0151] Δv=v eng *iv;

[0152] Among them, Δv is the speed difference, i is the end speed ratio from the engine to the input shaft of the electromagnetic clutch, v is the output shaft speed, v eng is the engine speed.

[0153] In an optional manner, judging whether there is a risk of engine stalling according to the parameter information includes:

[0154] When the parameter information is an active braking signal sent by the intelligent driving system, it is determined that there is a risk of engine stalling;

[0155] The active braking signal is a flag generated after the vehicle's radar and camera detect the driving environment information in real time to determine that the vehicle is at risk of collision and perform active emergency braking.

[0156] In an optional manner, after the step of controlling the electromagnetic clutch to separate from the engine, the method further includes:

[0157] The vehicle is controlled to switch to series drive mode so that the generator controls the motor to drive the vehicle.

[0158] In an optional manner, the program 610 is called by the processor 602 to enable the separation control device of the electromagnetic clutch to perform the following operations:

[0159] When the electromagnetic clutch is in a rigid connection, obtaining parameter information of the vehicle, the parameter information including one or more combinations of the following: output shaft speed of the electromagnetic clutch, operating parameters of the engine and the electromagnetic clutch, brake pedal signal, and active braking signal sent by the intelligent driving system;

[0160] Determining whether there is a risk of engine stalling based on the parameter information;

[0161] If there is a risk of engine stalling, the electromagnetic clutch is controlled to separate from the engine.

[0162] In an optional manner, judging whether there is a risk of engine stalling according to the parameter information includes:

[0163] When the parameter information is the output shaft speed of the electromagnetic clutch, the output shaft deceleration is calculated using the output shaft speed;

[0164] If the output shaft deceleration is less than a preset first calibration value, it is determined that there is a risk of engine stalling;

[0165] If the output shaft deceleration is greater than or equal to a preset first calibration value, it is determined that there is no risk of engine stalling;

[0166] The preset first calibration value is a calibration value obtained by querying the real-time vehicle speed after acquiring the real-time vehicle speed.

[0167] In an optional manner, calculating the output shaft deceleration by using the output shaft speed includes:

[0168] Calculate the output shaft deceleration according to the following formula:

[0169]

[0170] Where a is the output shaft deceleration, v is the output shaft speed, and t is time.

[0171] In an optional manner, judging whether there is a risk of engine stalling according to the parameter information includes:

[0172] When the parameter information is the brake pedal signal, the output shaft speed of the electromagnetic clutch, the engine speed and the terminal speed ratio from the engine to the input shaft of the electromagnetic clutch, the speed difference between the input shaft and the output shaft of the clutch is calculated based on the engine speed, the terminal speed ratio and the output shaft speed;

[0173] If the absolute value of the speed difference is less than a preset second calibration value and the brake pedal signal indicates that the brake pedal is depressed, it is determined that there is a risk of engine stalling;

[0174] If the absolute value of the speed difference is greater than or equal to a preset second calibration value and the engine speed is less than a preset speed value, it is determined that there is a risk of engine stalling;

[0175] If the absolute value of the speed difference is greater than or equal to a preset second calibration value and the engine speed is greater than a preset speed value, it is determined that there is no risk of engine stalling;

[0176] The preset second calibration value is a calibration value obtained by querying the engine speed.

[0177] In an optional manner, the speed difference between the input shaft and the output shaft of the clutch is calculated based on the engine speed, the terminal speed ratio and the output shaft speed, including:

[0178] According to the following formula, calculate the speed difference between the input shaft and the output shaft of the clutch:

[0179] Δv=v eng *iv;

[0180] Among them, Δv is the speed difference, i is the end speed ratio from the engine to the input shaft of the electromagnetic clutch, v is the output shaft speed, v eng is the engine speed.

[0181] In an optional manner, judging whether there is a risk of engine stalling according to the parameter information includes:

[0182] When the parameter information is an active braking signal sent by the intelligent driving system, it is determined that there is a risk of engine stalling;

[0183] The active braking signal is a flag generated after the vehicle's radar and camera detect the driving environment information in real time to determine that the vehicle is at risk of collision and perform active emergency braking.

[0184] In an optional manner, after the step of controlling the electromagnetic clutch to separate from the engine, the method further includes:

[0185] The vehicle is controlled to switch to series drive mode so that the generator controls the motor to drive the vehicle.

[0186] An embodiment of the present invention provides a computer-readable storage medium, which stores at least one executable instruction. When the executable instruction is executed on a separation control device / apparatus of an electromagnetic clutch, the separation control device / apparatus of the electromagnetic clutch executes the separation control method of the electromagnetic clutch in any of the above-mentioned method embodiments.

[0187] The executable instructions can be specifically used to enable the separation control device / apparatus of the electromagnetic clutch to perform the following operations:

[0188] When the electromagnetic clutch is in a rigid connection, obtaining parameter information of the vehicle, the parameter information including one or more combinations of the following: output shaft speed of the electromagnetic clutch, operating parameters of the engine and the electromagnetic clutch, brake pedal signal, and active braking signal sent by the intelligent driving system;

[0189] Determining whether there is a risk of engine stalling based on the parameter information;

[0190] If there is a risk of engine stalling, the electromagnetic clutch is controlled to separate from the engine.

[0191] In an optional manner, judging whether there is a risk of engine stalling according to the parameter information includes:

[0192] When the parameter information is the output shaft speed of the electromagnetic clutch, the output shaft deceleration is calculated using the output shaft speed;

[0193] If the output shaft deceleration is less than a preset first calibration value, it is determined that there is a risk of engine stalling;

[0194] If the output shaft deceleration is greater than or equal to a preset first calibration value, it is determined that there is no risk of engine stalling;

[0195] The preset first calibration value is a calibration value obtained by querying the real-time vehicle speed after acquiring the real-time vehicle speed.

[0196] In an optional manner, calculating the output shaft deceleration by using the output shaft speed includes:

[0197] Calculate the output shaft deceleration according to the following formula:

[0198]

[0199] Where a is the output shaft deceleration, v is the output shaft speed, and t is time.

[0200] In an optional manner, judging whether there is a risk of engine stalling according to the parameter information includes:

[0201] When the parameter information is the brake pedal signal, the output shaft speed of the electromagnetic clutch, the engine speed and the terminal speed ratio from the engine to the input shaft of the electromagnetic clutch, the speed difference between the input shaft and the output shaft of the clutch is calculated based on the engine speed, the terminal speed ratio and the output shaft speed;

[0202] If the absolute value of the speed difference is less than a preset second calibration value and the brake pedal signal indicates that the brake pedal is depressed, it is determined that there is a risk of engine stalling;

[0203] If the absolute value of the speed difference is greater than or equal to a preset second calibration value and the engine speed is less than a preset speed value, it is determined that there is a risk of engine stalling;

[0204] If the absolute value of the speed difference is greater than or equal to a preset second calibration value and the engine speed is greater than a preset speed value, it is determined that there is no risk of engine stalling;

[0205] The preset second calibration value is a calibration value obtained by querying the engine speed.

[0206] In an optional manner, the speed difference between the input shaft and the output shaft of the clutch is calculated based on the engine speed, the terminal speed ratio and the output shaft speed, including:

[0207] According to the following formula, calculate the speed difference between the input shaft and the output shaft of the clutch:

[0208] Δv=v eng *iv;

[0209] Among them, Δv is the speed difference, i is the end speed ratio from the engine to the input shaft of the electromagnetic clutch, v is the output shaft speed, v eng is the engine speed.

[0210] In an optional manner, judging whether there is a risk of engine stalling according to the parameter information includes:

[0211] When the parameter information is an active braking signal sent by the intelligent driving system, it is determined that there is a risk of engine stalling;

[0212] The active braking signal is a flag generated after the vehicle's radar and camera detect the driving environment information in real time to determine that the vehicle is at risk of collision and perform active emergency braking.

[0213] In an optional manner, after the step of controlling the electromagnetic clutch to separate from the engine, the method further includes:

[0214] The vehicle is controlled to switch to series drive mode so that the generator controls the motor to drive the vehicle.

[0215] In an optional manner, the executable instruction enables the separation control device / apparatus of the electromagnetic clutch to perform the following operations:

[0216] When the electromagnetic clutch is in a rigid connection, obtaining parameter information of the vehicle, the parameter information including one or more combinations of the following: output shaft speed of the electromagnetic clutch, operating parameters of the engine and the electromagnetic clutch, brake pedal signal, and active braking signal sent by the intelligent driving system;

[0217] Determining whether there is a risk of engine stalling based on the parameter information;

[0218] If there is a risk of engine stalling, the electromagnetic clutch is controlled to separate from the engine.

[0219] In an optional manner, judging whether there is a risk of engine stalling according to the parameter information includes:

[0220] When the parameter information is the output shaft speed of the electromagnetic clutch, the output shaft deceleration is calculated using the output shaft speed;

[0221] If the output shaft deceleration is less than a preset first calibration value, it is determined that there is a risk of engine stalling;

[0222] If the output shaft deceleration is greater than or equal to a preset first calibration value, it is determined that there is no risk of engine stalling;

[0223] The preset first calibration value is a calibration value obtained by querying the real-time vehicle speed after acquiring the real-time vehicle speed.

[0224] In an optional manner, calculating the output shaft deceleration by using the output shaft speed includes:

[0225] Calculate the output shaft deceleration according to the following formula:

[0226]

[0227] Where a is the output shaft deceleration, v is the output shaft speed, and t is time.

[0228] In an optional manner, judging whether there is a risk of engine stalling according to the parameter information includes:

[0229] When the parameter information is the brake pedal signal, the output shaft speed of the electromagnetic clutch, the engine speed and the terminal speed ratio from the engine to the input shaft of the electromagnetic clutch, the speed difference between the input shaft and the output shaft of the clutch is calculated based on the engine speed, the terminal speed ratio and the output shaft speed;

[0230] If the absolute value of the speed difference is less than a preset second calibration value and the brake pedal signal indicates that the brake pedal is depressed, it is determined that there is a risk of engine stalling;

[0231] If the absolute value of the speed difference is greater than or equal to a preset second calibration value and the engine speed is less than a preset speed value, it is determined that there is a risk of engine stalling;

[0232] If the absolute value of the speed difference is greater than or equal to a preset second calibration value and the engine speed is greater than a preset speed value, it is determined that there is no risk of engine stalling;

[0233] The preset second calibration value is a calibration value obtained by querying the engine speed.

[0234] In an optional manner, the speed difference between the input shaft and the output shaft of the clutch is calculated based on the engine speed, the terminal speed ratio and the output shaft speed, including:

[0235] According to the following formula, calculate the speed difference between the input shaft and the output shaft of the clutch:

[0236] Δv=v eng *iv;

[0237] Among them, Δv is the speed difference, i is the end speed ratio from the engine to the input shaft of the electromagnetic clutch, v is the output shaft speed, v eng is the engine speed.

[0238] In an optional manner, judging whether there is a risk of engine stalling according to the parameter information includes:

[0239] When the parameter information is an active braking signal sent by the intelligent driving system, it is determined that there is a risk of engine stalling;

[0240] The active braking signal is a flag generated after the vehicle's radar and camera detect the driving environment information in real time to determine that the vehicle is at risk of collision and perform active emergency braking.

[0241] In an optional manner, after the step of controlling the electromagnetic clutch to separate from the engine, the method further includes:

[0242] The vehicle is controlled to switch to series drive mode so that the generator controls the motor to drive the vehicle.

[0243] The algorithms or displays provided herein are not inherently related to any particular computer, virtual system or other device. In addition, the embodiments of the present invention are not directed to any particular programming language.

[0244] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. Similarly, in order to simplify the present invention and help understand one or more of the various inventive aspects, in the above description of exemplary embodiments of the present invention, the various features of the embodiments of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. Wherein, the claims that follow the specific embodiment are hereby expressly incorporated into the specific embodiment, wherein each claim itself is a separate embodiment of the present invention.

[0245] 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 further 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.

[0246] 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. The steps in the above embodiments, unless otherwise specified, should not be understood as limitations on the order of execution.

Claims

1. A separation control method of an electromagnetic clutch, characterized in that: The method comprises: When the electromagnetic clutch is in a rigid connection, obtaining parameter information of the vehicle, the parameter information including one or more combinations of the following: output shaft speed of the electromagnetic clutch, operating parameters of the engine and the electromagnetic clutch, brake pedal signal, and active braking signal sent by the intelligent driving system; Determining whether there is a risk of engine stalling based on the parameter information; If there is a risk of engine stalling, the electromagnetic clutch is controlled to separate from the engine.

2. The method according to claim 1, characterized in that The determining, based on the parameter information, whether there is a risk of engine stalling includes: When the parameter information is the output shaft speed of the electromagnetic clutch, the output shaft deceleration is calculated using the output shaft speed; If the output shaft deceleration is less than a preset first calibration value, it is determined that there is a risk of engine stalling; If the output shaft deceleration is greater than or equal to a preset first calibration value, it is determined that there is no risk of engine stalling; The preset first calibration value is a calibration value obtained by querying the real-time vehicle speed after acquiring the real-time vehicle speed.

3. The method according to claim 2, characterized in that The step of calculating the output shaft deceleration by using the output shaft speed comprises: Calculate the output shaft deceleration according to the following formula: Where a is the output shaft deceleration, v is the output shaft speed, and t is time.

4. The method according to claim 1, characterized in that The determining, based on the parameter information, whether there is a risk of engine stalling includes: When the parameter information is the brake pedal signal, the output shaft speed of the electromagnetic clutch, the engine speed and the terminal speed ratio from the engine to the input shaft of the electromagnetic clutch, the speed difference between the input shaft and the output shaft of the clutch is calculated based on the engine speed, the terminal speed ratio and the output shaft speed; If the absolute value of the speed difference is less than a preset second calibration value and the brake pedal signal indicates that the brake pedal is depressed, it is determined that there is a risk of engine stalling; If the absolute value of the speed difference is greater than or equal to a preset second calibration value and the engine speed is less than a preset speed value, it is determined that there is a risk of engine stalling; If the absolute value of the speed difference is greater than or equal to a preset second calibration value and the engine speed is greater than a preset speed value, it is determined that there is no risk of engine stalling; The preset second calibration value is a calibration value obtained by querying the engine speed.

5. The method according to claim 4, characterized in that The calculating the speed difference between the input shaft and the output shaft of the clutch according to the engine speed, the terminal speed ratio and the output shaft speed comprises: According to the following formula, calculate the speed difference between the input shaft and the output shaft of the clutch: Δv=v eng *i-v; Among them, Δv is the speed difference, i is the end speed ratio from the engine to the input shaft of the electromagnetic clutch, v is the output shaft speed, v eng is the engine speed.

6. The method according to claim 1, characterized in that The determining, based on the parameter information, whether there is a risk of engine stalling includes: When the parameter information is an active braking signal sent by the intelligent driving system, it is determined that there is a risk of engine stalling; The active braking signal is a flag generated after the vehicle's radar and camera detect the driving environment information in real time to determine that the vehicle is at risk of collision and perform active emergency braking.

7. The method according to any one of claims 1 to 6, characterized in that: After the step of controlling the electromagnetic clutch to separate from the engine, the method further comprises: The vehicle is controlled to switch to series drive mode so that the generator controls the motor to drive the vehicle.

8. A separation control device for an electromagnetic clutch, characterized in that: The device comprises: An information acquisition module is used to acquire parameter information of the vehicle when the electromagnetic clutch is in a rigid connection, wherein the parameter information includes one or more combinations of the following: output shaft speed of the electromagnetic clutch, operating parameters of the engine and the electromagnetic clutch, brake pedal signal, and active braking signal sent by the intelligent driving system; A risk determination module, used to determine whether there is a risk of engine stalling according to the parameter information; The control separation module is used to control the electromagnetic clutch to separate from the engine if there is a risk of engine stalling.

9. A separation control device for an electromagnetic clutch, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the electromagnetic clutch separation control method as described in any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer-executable program, and the computer-executable program is used to enable a computer to execute the electromagnetic clutch separation control method according to any one of claims 1 to 7.

Images