An idling power generation control method and related device

Abstract

The present application discloses an idle power generation control method and related device, relating to the field of control technologies. In the present application, when it is determined that the motor is in the non-steady-state idle power generation mode, based on the target idle speed corresponding to the steady-state idle power generation mode and a preset speed deviation amount, the expected motor speed of the motor is obtained, and then the current motor speed of the motor is adjusted to the expected motor speed. Finally, through a torque sensor, the clutch engagement torque is obtained according to a preset torque acquisition period until the motor is in the steady-state idle power generation mode. By adopting this method, it avoids the technical drawbacks in the prior art that the engine speed fluctuates due to the rotational inertia of the motor and its single-stage reducer, and the oscillation of the pinion of the single-stage reducer is caused due to the existence of the backlash of the single-stage reducer, thereby improving the NVH performance of the hybrid vehicle during the process of the motor of the hybrid vehicle entering the steady-state idle power generation.

Description

Technical Field

[0001] The present application relates to the field of control technologies, and in particular, to an idle power generation control method and related devices. Background Art

[0002] At present, hybrid vehicles are superior to the original fuel vehicles in terms of driving performance in various aspects. For example, when a hybrid vehicle is accelerating to overtake, the time taken is significantly less than that of a fuel vehicle, and it is easier to achieve acceleration and overtaking.

[0003] In view of the improvement of the driving performance of hybrid vehicles, it is necessary to be based on the improvement of the overall vehicle's electrical balance ability; further, to improve the overall vehicle's electrical balance ability, it is necessary to improve the noise, vibration, and harshness (NVH), that is, the ride comfort, of hybrid vehicles.

[0004] However, during the process of the motor of a hybrid vehicle entering idle power generation, the vehicle controller controls the target gear of the even shaft to return to neutral; then, after the actual gear enters neutral, it controls the even clutch to engage; when the transmission feedbacks that the state of the even clutch is closed, it controls the motor to enter idle power generation, and at the same time controls the engine to apply an additional compensation torque, so as to control the motor to enter steady-state idle power generation.

[0005] It can be seen that by using the above idle power generation control method for hybrid vehicles, dragging the motor according to the process of the even clutch engaging to ensure that the motor speed is synchronized with the engine speed will cause fluctuations in the engine speed due to the rotational inertia of the motor and its single-stage reducer; and due to the existence of the backlash of the single-stage reducer, it will cause the pinion of the single-stage reducer to oscillate, thereby wearing the flywheel of the engine, and further seriously affecting the NVH performance of hybrid vehicles.

[0006] Therefore, by using the above method, it is difficult to improve the NVH performance of hybrid vehicles during the process of the motor of a hybrid vehicle entering steady-state idle power generation. Summary of the Invention

[0007] The embodiments of the present application provide an idle power generation control method and related devices, which are applied to hybrid vehicles to improve the NVH performance of hybrid vehicles during the process of the motor of a hybrid vehicle entering steady-state idle power generation.

[0008] In a first aspect, the embodiments of the present application provide an idle power generation control method, and the method includes:

[0009] When it is determined that the motor is in a non-steady-state idle power generation mode, based on the target idle speed corresponding to the steady-state idle power generation mode and a preset speed deviation amount, an expected motor speed of the motor is obtained;

[0010] Adjust the current motor speed of the motor to the expected motor speed;

[0011] Through a torque sensor, obtain the clutch engagement torque according to a preset torque acquisition period until the motor is in the steady-state idle power generation mode; wherein, for each obtained engagement torque, perform the following operations:

[0012] Select a target load torque corresponding to the currently obtained engagement torque from a preset set of candidate load torques;

[0013] Based on the target load torque, obtain the expected load torque of the power component;

[0014] Adjust the actual working torque of the power component to the expected load torque;

[0015] If the expected load torque meets the preset steady-state idle power generation condition, determine that the motor is in the steady-state idle power generation mode.

[0016] In a second aspect, an embodiment of the present application further provides an idle power generation control device, and the device includes:

[0017] An acquisition module, configured to, when it is determined that the motor is in a non-steady-state idle power generation mode, obtain the expected motor speed of the motor based on the target idle speed corresponding to the steady-state idle power generation mode and a preset speed deviation amount;

[0018] An adjustment module, configured to adjust the current motor speed of the motor to the expected motor speed;

[0019] A discrimination module, configured to, through a torque sensor, obtain the clutch engagement torque according to a preset torque acquisition period until the motor is in the steady-state idle power generation mode; wherein, for each obtained engagement torque, perform the following operations:

[0020] Select a target load torque corresponding to the currently obtained engagement torque from a preset set of candidate load torques;

[0021] Based on the target load torque, obtain the expected load torque of the power component;

[0022] Adjust the actual working torque of the power component to the expected load torque;

[0023] If the expected load torque meets the preset steady-state idle power generation condition, determine that the motor is in the steady-state idle power generation mode.[[ID=!]]

[0024] In a possible embodiment, when it is determined that the motor is in a non-steady-state idle power generation mode, the acquisition module is specifically configured to:

[0025] During the operation of the engine, obtain the remaining energy storage capacity of the energy storage device at a set time;

[0026] When the remaining energy storage capacity is less than a preset energy storage capacity threshold, trigger the motor to enter the non-steady idle power generation mode.

[0027] In a possible embodiment, when it is determined that the motor is in the non-steady idle power generation mode, the obtaining module is specifically configured to:

[0028] During the operation of the engine, obtain the remaining energy storage capacity of the energy storage device at a set time;

[0029] When the remaining energy storage capacity is less than a preset energy storage capacity threshold, trigger the engine to enter the neutral state;

[0030] When the engine is in the neutral state, trigger the motor to enter the non-steady idle power generation mode.

[0031] In a possible embodiment, during the process of adjusting the current motor speed of the motor to the expected motor speed, the adjusting module is further configured to:

[0032] Continuously record the motor speed adjustment duration of the motor;

[0033] If the motor speed adjustment duration reaches a preset speed adjustment duration threshold, stop adjusting the current motor speed of the motor to the expected motor speed.

[0034] In a possible embodiment, when obtaining the expected load torque of the power element based on the target load torque, the discrimination module is specifically configured to:

[0035] If the power element is a motor, use the target load torque as the expected load torque;

[0036] If the power element is an engine, obtain the expected load torque of the engine based on the target load torque and a preset torque offset.

[0037] In a possible embodiment, during the process of obtaining the clutch engagement torque through a torque sensor according to a preset torque acquisition period until the motor is in the steady idle power generation mode, the discrimination module is further configured to:

[0038] Continuously record the torque adjustment duration of the power element;

[0039] When the torque adjustment duration reaches a preset torque adjustment duration threshold, re-obtain the current energy storage capacity of the energy storage device;

[0040] If the current energy storage capacity is less than the energy storage capacity threshold, re-trigger the motor to enter the non-steady idle power generation mode.

[0041] In a third aspect, an electronic device is proposed, which includes a processor and a memory. Among them, the memory stores program codes, and when the program codes are executed by the processor, the processor is caused to execute the steps of the idle power generation control method described in the first aspect above.

[0042] In a fourth aspect, a computer-readable storage medium is proposed, which includes program codes. When the program codes run on an electronic device, the program codes are used to cause the electronic device to execute the steps of the idle power generation control method described in the first aspect above.

[0043] In a fifth aspect, a computer program product is provided. When the computer program product is called by a computer, the computer is caused to execute the steps of the idle power generation control method described in the first aspect.

[0044] The beneficial effects of this application are as follows:

[0045] In the idle power generation control method provided in the embodiments of this application, when it is determined that the motor is in a non-steady idle power generation mode, based on the target idle speed corresponding to the steady idle power generation mode and a preset speed deviation amount, the expected motor speed of the motor is obtained. Then, the current motor speed of the motor is adjusted to the expected motor speed. Finally, through a torque sensor, according to a preset torque acquisition period, the clutch engagement torque is obtained until the motor is in a steady idle power generation mode; among them, for each obtained engagement torque, the following operations are performed: from a preset candidate load torque set, a target load torque corresponding to the currently obtained engagement torque is selected, and then based on the target load torque, the expected load torque of the power component is obtained, so as to adjust the actual working torque of the power component to the expected load torque. And if the expected load torque meets the preset steady idle power generation condition, it is determined that the motor is in a steady idle power generation mode.

[0046] By adopting this method, the current motor speed of the motor is adjusted to the expected motor speed, and then through a torque sensor, according to a preset torque acquisition period, the clutch engagement torque is obtained until the motor is in a steady idle power generation mode, avoiding the technical drawbacks in the prior art that due to the rotational inertia of the motor and its single-stage reduction gearbox, the engine speed fluctuates, and due to the existence of the backlash of the single-stage reduction gearbox, the pinion of the single-stage reduction gearbox vibrates, thereby wearing the flywheel of the engine, and further seriously affecting the NVH performance of the hybrid vehicle. Thus, during the process of the motor of the hybrid vehicle entering the steady idle power generation, the NVH performance of the hybrid vehicle is improved.

[0047] In addition, other features and advantages of the present application will be described in the subsequent specification, and in part will be obvious from the specification, or will be understood by implementing the present application. The objectives and other advantages of the present application can be achieved and obtained by the structures specifically pointed out in the written specification, claims, and drawings. Description of the Drawings

[0048] Figure 1 Exemplarily shown is a schematic diagram of the control structure of a hybrid vehicle provided by an embodiment of the present application;

[0049] Figure 2 Exemplarily shown is a schematic diagram of an application scenario provided by an embodiment of the present application;

[0050] Figure 3 Exemplarily shown is a schematic diagram of the method flow of an idle power generation control method provided by an embodiment of the present application;

[0051] Figure 4 Exemplarily shown is a schematic diagram of a specific application scenario for determining whether a motor is in an unsteady idle power generation mode provided by an embodiment of the present application;

[0052] Figure 5 Exemplarily shown is a schematic diagram of a specific application scenario for determining whether a motor is in an unsteady idle power generation mode provided by an embodiment of the present application;

[0053] Figure 6 Exemplarily shown is a schematic diagram of a specific scenario for adjusting the motor speed provided by an embodiment of the present application;

[0054] Figure 7 Exemplarily shown is a schematic diagram of the method flow for determining whether a motor is in a steady idle power generation mode provided by an embodiment of the present application;

[0055] Figure 8 Exemplarily shown is a schematic diagram of a specific scenario for adjusting the torque of a power element provided by an embodiment of the present application;

[0056] Figure 9 Exemplarily shown is a kind based on Figure 3 specific scenario diagram;

[0057] Figure 10 Exemplarily shown is a schematic diagram of the structure of an idle power generation control device provided by an embodiment of the present application;

[0058] Figure 11 Exemplarily shown is a schematic diagram of the structure of an electronic device provided by an embodiment of the present application. Detailed Description of the Invention

[0059] To make the objectives, technical solutions and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are part of the technical solutions of this application, rather than all of them. Based on the embodiments described in this application document, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope protected by the technical solutions of this application.

[0060] It should be noted that in the description of this application, "a plurality of" is understood as "at least two". "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The connection between A and B can represent: the direct connection between A and B and the connection between A and B through C. In addition, in the description of this application, words such as "first" and "second" are only used for the purpose of distinguishing descriptions, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying order.

[0061] The following explains some terms in the embodiments of this application to facilitate the understanding of those skilled in the art.

[0062] (1) Electric machinery (commonly known as "motor"): It refers to an electromagnetic device that realizes the conversion or transfer of electrical energy based on the law of electromagnetic induction. It can be divided into static electric machinery (transformer) and rotating electric machinery. Rotating electric machinery is further divided into DC motors and AC motors, and AC motors are further divided into synchronous motors and asynchronous motors.

[0063] It should be noted that motors and generators are just different working states of electric machinery. If the electric machinery converts electrical energy into mechanical energy during operation, it is a motor; otherwise, it is a generator. Except that most asynchronous motors can only be used as motors, other electric machinery can be used as both motors and generators. In the embodiments of this application, the electric machinery can be used as both a generator and a motor.

[0064] (2) Engine: It is a machine that can convert other forms of energy into mechanical energy, including internal combustion engines (reciprocating piston engines), external combustion engines (Stirling engines, steam engines, etc.), jet engines, electric motors, etc. The engine is applicable to power generation devices and can also refer to the entire machine including the power generation device (such as gasoline engines, aero engines).

[0065] (3) Neutral gear: Usually refers to the state where the gear lever of a motor vehicle is not placed in any forward or reverse gear position, and the gearbox is completely separated from the drive wheels. The neutral gear of a manual transmission is in the middle position, while the neutral gear of an automatic transmission is at the "N" mark.

[0066] (4) Idle speed: It refers to the operation of the engine in neutral gear, that is, the engine "produces power but does not do work". The rotational speed of the engine at idle speed is called the idle speed. Among them, the idle speed can be adjusted by adjusting the size of the throttle valve, etc.

[0067] Exemplarily, when the engine is running, if the accelerator pedal is completely released, the engine is in the idle state at this time. It should be noted that when adjusting the idle speed, the rotational speed cannot suddenly increase or decrease, otherwise it will cause early wear to the engine. It is best to go to the automobile maintenance department for adjustment.

[0068] (5) Transmission: It is a mechanism used to change the rotational speed and torque from the engine, and can fix or shift gears to change the transmission ratio between the output shaft and the input shaft, also known as the gearbox. The transmission consists of a transmission mechanism and a control mechanism. Some automobiles also have a power output mechanism. Most of the transmission mechanisms use ordinary gear transmissions, and some use planetary gear transmissions. The ordinary gear transmission mechanism generally uses sliding gears and synchronizers, etc.

[0069] (6) Clutch: It is located in the flywheel housing between the engine and the transmission, and the clutch assembly is fixed to the rear plane of the flywheel with screws. The output shaft of the clutch is the input shaft of the gearbox. During the driving process of the automobile, the driver can step on or release the clutch pedal as needed to temporarily separate and gradually engage the engine and the gearbox, so as to cut off or transmit the power input from the engine to the transmission.

[0070] The design concept of the embodiment of the present application is briefly introduced below:

[0071] Refer to Figure 1 As shown, it is a schematic diagram of the control structure of a hybrid vehicle provided by the embodiment of the present application. The control structure includes: an engine 101, clutches (102a, 102b), a transmission 103, a motor 104, gear controllers (105a, 105b), and drive wheels (106a, 106b). Among them, the transmission 103 includes: clutches (102a, 102b), a motor 104, and gear controllers (105a, 105b). The engine 101 is connected to the motor 104 via the clutch 102b, and the motor 104 is connected to an energy storage device (not shown in the figure). It should be noted that the clutch 102a can also be called an odd clutch, and the clutch 102b can also be called an even clutch.

[0072] Based on the above control structure of the hybrid vehicle, in the related art, a hybrid power system with a single motor coupled to the even shaft of a dual-clutch transmission can achieve a good fuel-saving effect, and at the same time has the advantages of low cost and short development cycle, becoming a new development trend. This hybrid power system can realize three different modes: pure electric drive, series power generation, and parallel drive. Among them, entering the idle power generation in place is a typical working condition in the series power generation mode. During the process of controlling the engagement of the even clutch, it will bring engine speed fluctuations and oscillations of the motor single-stage reducer gears, affecting the NVH performance.

[0073] Specifically, when entering the idle power generation in place working condition, during the process of the even clutch engaging, due to the existence of the inertia of the motor and the single-stage reducer, the engine speed drops and fluctuates. Insufficient engine reserve torque will exacerbate the speed drop, and the existence of the backlash of the motor single-stage reducer will cause oscillations of the reducer pinion. Especially when the engine flywheel wears, the damping of the transmission system decreases, amplifying the oscillation amplitude of the pinion and bringing abnormal noises.

[0074] In view of this, in the embodiments of the present application, when it is determined that the motor is in the non-steady idle power generation mode, based on the target idle speed corresponding to the steady idle power generation mode and a preset speed deviation amount, the expected motor speed of the motor is obtained, and then the current motor speed of the motor is adjusted to the expected motor speed. Finally, through the torque sensor, according to the preset torque acquisition period, the engagement torque of the clutch is obtained until the motor is in the steady idle power generation mode; wherein, for each obtained engagement torque, the following operations are performed: select the target load torque corresponding to the currently obtained engagement torque from the preset candidate load torque set, and then based on the target load torque, obtain the expected load torque of the power element, so as to adjust the actual working torque of the power element to the expected load torque, and if the expected load torque meets the preset steady idle power generation condition, it is determined that the motor is in the steady idle power generation mode, thereby improving the NVH performance of the hybrid vehicle during the process of the motor of the hybrid vehicle entering the steady idle power generation.

[0075] It should be noted that the engagement torque of the above clutch can characterize the torque transmission ability of the clutch.

[0076] In particular, the preferred embodiments of the present application are described below in conjunction with the accompanying drawings of the specification. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. And without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0077] As Figure 2As shown in the figure, it is a schematic diagram of an application scenario provided by an embodiment of the present application. The application scenario schematic diagram includes: a vehicle body controller 201 and a power element 202. Among them, the vehicle body controller and the power element are connected by a circuit. The above devices and their functions are briefly introduced below:

[0078] The vehicle body controller 201 is configured to, when it is determined that the motor is in the non-steady-state idle power generation mode, obtain the expected motor speed of the motor based on the target idle speed corresponding to the steady-state idle power generation mode and a preset speed deviation amount, and then adjust the current motor speed of the motor to the expected motor speed. Thus, through a torque sensor, the clutch engagement torque is obtained according to a preset torque acquisition period until the motor is in the steady-state idle power generation mode; wherein, for each obtained engagement torque, the following operations are performed: select a target load torque corresponding to the currently obtained engagement torque from a preset candidate load torque set; obtain the expected load torque of the power element based on the target load torque; adjust the actual working torque of the power element to the expected load torque; if the expected load torque meets the preset steady-state idle power generation condition, it is determined that the motor is in the steady-state idle power generation mode.

[0079] The power element 202 is configured to receive an instruction issued by the vehicle body controller 201, and based on the received instruction, adjust its own actual working torque to provide power for the hybrid vehicle. Among them, the power element 202 can be an engine or a motor.

[0080] Next, in combination with the above application scenario schematic diagram, the idle power generation control method provided by an exemplary embodiment of the present application will be described with reference to the accompanying drawings. It should be noted that the above application scenario schematic diagram is only shown for the convenience of understanding the spirit and principle of the present application, and the embodiments of the present application are not limited in this regard.

[0081] Refer to Figure 3 As shown in the figure, it is a flowchart of the implementation of an idle power generation control method provided by an embodiment of the present application. Taking the vehicle body controller as the execution subject, the specific implementation process of the method is as follows:

[0082] S301: When it is determined that the motor is in the non-steady-state idle power generation mode, obtain the expected motor speed of the motor based on the target idle speed corresponding to the steady-state idle power generation mode and a preset speed deviation amount.

[0083] Specifically, when performing step S301, during the process of the vehicle body controller determining whether the motor enters the steady-state idle power generation mode, it is necessary to first determine whether the motor is already in the non-steady-state idle power generation mode. In the embodiments of the present application, two methods for determining whether the motor is already in the non-steady-state idle power generation mode are provided.

[0084] In a possible implementation, during the operation of the engine, the vehicle body controller obtains the remaining energy storage capacity of the energy storage device at a set moment. Thus, when the remaining energy storage capacity is less than a preset energy storage capacity threshold, the motor is triggered to enter the non-steady idle power generation mode; conversely, when the remaining energy storage capacity is not less than the preset energy storage capacity threshold, the motor is not triggered to enter the non-steady idle power generation mode.

[0085] Exemplarily, referring to Figure 4 As shown, it is a schematic diagram of a specific application scenario for determining whether the motor is in the non-steady idle power generation mode provided by an embodiment of the present application. Assume that the preset energy storage capacity threshold is 10%. If the vehicle body controller obtains the remaining energy storage capacity of the energy storage device at a set moment (for example, 2022.5.24 14:04:58) during the operation of the engine, which is 16%, greater than the preset energy storage capacity threshold of 10%, then the motor is not triggered to enter the non-steady idle power generation mode; if the vehicle body controller obtains the remaining energy storage capacity of the energy storage device at a set moment during the operation of the engine, which is 6%, less than the preset energy storage capacity threshold of 10%, then the motor is triggered to enter the non-steady idle power generation mode.

[0086] In an alternative implementation, during the operation of the engine, the vehicle body controller obtains the remaining energy storage capacity of the energy storage device at a set moment. Thus, when the remaining energy storage capacity is less than a preset energy storage capacity threshold, the engine is triggered to enter the neutral state, and then when the engine is in the neutral state, the motor is triggered to enter the non-steady idle power generation mode; conversely, when the remaining energy storage capacity is not less than the preset energy storage capacity threshold, the engine is not triggered to enter the neutral state, and then the motor is not triggered to enter the non-steady idle power generation mode.

[0087] Exemplarily, referring to Figure 5 As shown, it is a schematic diagram of a specific application scenario for determining whether the motor is in the non-steady idle power generation mode provided by an embodiment of the present application. Assume that the preset energy storage capacity threshold is still 10%. If the vehicle body controller obtains the remaining energy storage capacity of the energy storage device at a set moment (for example, 2022.5.24 14:07:32) during the operation of the engine, which is 21%, greater than the preset energy storage capacity threshold of 10%, then the engine is not triggered to enter the neutral state, and then the motor is not triggered to enter the non-steady idle power generation mode; if the vehicle body controller obtains the remaining energy storage capacity of the energy storage device at a set moment during the operation of the engine, which is 7%, less than the preset energy storage capacity threshold of 10%, then the engine is triggered to enter the neutral state, and then when the engine is in the neutral state, the motor is triggered to enter the non-steady idle power generation mode.

[0088] Optionally, the vehicle body controller continuously records the state adjustment duration when the engine enters the neutral state. If the state adjustment duration reaches the preset state adjustment duration threshold, it stops the engine from entering the neutral state, and after detecting that the engine is normal, it triggers the engine to enter the neutral state again.

[0089] Exemplarily, assume that the preset state adjustment duration threshold is 20S. If the state adjustment duration when the engine enters the neutral state reaches the preset state adjustment duration threshold of 20S and it has not entered the neutral state yet, it immediately stops the engine from entering the neutral state, and after detecting that the engine is normal, it triggers the engine to enter the neutral state again.

[0090] Obviously, when the vehicle body controller times out when the engine enters the neutral state, it directly ends the process of the engine entering the neutral state this time, effectively avoiding the problems that the operation of the engine entering the neutral state cannot be completed and the motor cannot be triggered to enter the non-steady idle power generation mode due to abnormal conditions of the engine.

[0091] It should be noted that the methods provided in the embodiments of the present application for determining whether the motor is in the non-steady idle power generation mode all disclose judging whether the motor is in the non-steady idle power generation mode according to whether the engine is in the running state and whether the remaining energy storage capacity of the energy storage device reaches the preset energy storage capacity threshold. Therefore, the methods for determining whether the motor is in the non-steady idle power generation mode based on this idea are all included in the embodiments of the present application, and no exhaustive description is made here.

[0092] Further, when the vehicle body controller determines that the motor is in the non-steady idle power generation mode based on the above two methods of triggering the motor to enter the non-steady idle power generation mode, it obtains the expected motor speed based on the target idle speed corresponding to the steady idle power generation mode and the preset speed deviation amount. The specific calculation formula for the expected motor speed is as follows:

[0093] N Y =N T +Δn

[0094] wherein, N Y represents the expected motor speed, N T represents the target idle speed, and Δn represents the preset speed deviation amount.

[0095] It should be noted that the above preset speed deviation amount is to prevent the motor speed from dropping back after the motor speed regulation ends. The motor actively adjusts the speed according to the preset speed deviation amount, which can effectively prevent the clutch engagement process from dragging the engine, thereby causing corresponding speed fluctuations.

[0096] Exemplarily, assume that the preset rotational speed deviation Δn = 150 r / min. When the vehicle body controller determines that the motor is in the non-steady-state idle power generation mode and obtains the target idle rotational speed N T corresponding to the steady-state idle power generation mode = 2750 r / min, based on the above formula for calculating the expected motor rotational speed, the expected motor rotational speed N Y of the motor can be obtained as N T + Δn = 2750 + 150 = 2900 r / min.

[0097] S302: Adjust the current motor rotational speed of the motor to the expected motor rotational speed.

[0098] Specifically, when performing step S302, refer to Figure 6 shown in the figure, which is a schematic diagram of a specific scenario for adjusting the motor rotational speed provided by an embodiment of the present application. After the vehicle body controller obtains the expected motor rotational speed of the motor, it controls the motor to adjust the current motor rotational speed to the expected motor rotational speed.

[0099] In a possible implementation manner, the vehicle body controller continuously records the motor rotational speed adjustment duration of the motor. If the motor rotational speed adjustment duration reaches the preset rotational speed adjustment duration threshold, the adjustment of the current motor rotational speed of the motor to the expected motor rotational speed is stopped.

[0100] Exemplarily, assume that the current motor rotational speed of the motor is 2625 r / min and the corresponding expected motor rotational speed is 3180 r / min. As shown in Table 1, it is not difficult to obtain that the rotational speed difference is 555 r, which belongs to the fourth rotational speed adjustment interval. Then the preset rotational speed adjustment duration threshold is 60 s. If the motor rotational speed adjustment duration of the motor is continuously recorded for 60 s and the rotational speed of the motor has not been adjusted to the expected motor rotational speed of 3180 r / min, the adjustment of the current motor rotational speed of the motor to the expected motor rotational speed is immediately stopped.

[0101] Table 1

[0102]

[0103] Based on the above table, the vehicle body controller can directly determine the corresponding adjustment duration threshold according to the rotational speed difference between the current motor rotational speed and the expected motor rotational speed, the rotational speed adjustment interval to which the above rotational speed difference belongs, and the corresponding relationship between the rotational speed adjustment interval and the adjustment duration threshold.

[0104] It should be noted that the specific values of each rotational speed adjustment interval and their corresponding rotational speed adjustment duration thresholds in Table 1 and the division of the rotational speed adjustment intervals are only for example and do not impose any limitations on the technical solutions provided by the present application.

[0105] Obviously, when the vehicle body controller detects that the motor speed regulation times out, it can directly end the motor speed regulation process, and then directly perform the operation of entering the steady-state idle power generation mode, effectively avoiding the problem that due to abnormal conditions of the motor, such as a failure of the corresponding speed regulation device, it takes a lot of time for the motor speed regulation, resulting in the inability to enter the steady-state idle power generation mode in a timely manner.

[0106] S303: Through the torque sensor, according to the preset torque acquisition period, obtain the clutch engagement torque until the motor is in the steady-state idle power generation mode.

[0107] Specifically, when performing step S303, after the vehicle body controller adjusts the current motor speed of the motor to the expected motor speed, through the torque sensor, according to the preset torque acquisition period, obtain the clutch engagement torque, where, refer to Figure 7 As shown, for each obtained engagement torque, the following operations are performed:

[0108] S3031: Select the target load torque corresponding to the currently obtained engagement torque from the preset candidate load torque set.

[0109] Exemplarily, when performing step S3031, after the motor speed regulation is completed, the vehicle body controller selects the target load torque corresponding to the currently obtained engagement torque from the preset candidate load torque set based on the correspondence between the engagement torque and the target load torque. Among them, taking 5 engagement torques as an example, the respective engagement torques and their corresponding candidate load torques are shown in Table 2:

[0110] Table 2

[0111]

[0112] S3032: Based on the target load torque, obtain the expected load torque of the power component.

[0113] Specifically, when performing step S3032, after the vehicle body controller obtains the target load torque, it can obtain the expected load torque of the corresponding power component according to the target load torque, where the power component can be a motor or an engine.

[0114] Further, if the power component is a motor, then use the target load torque as the expected load torque; if the power component is an engine, then based on the target load torque and the preset torque offset, obtain the expected load torque of the engine.

[0115] Obviously, based on the above method steps, the vehicle body controller can determine whether the motor enters the steady-state idle power generation mode according to the torque adjustment of the motor itself, or can also determine whether the motor enters the steady-state idle power generation mode according to the torque adjustment of the engine.

[0116] S3033: Adjust the actual working torque of the power element to the expected load torque.

[0117] Specifically, when performing step S3033, refer to Figure 8 As shown, it is a schematic diagram of a specific scenario for power element torque adjustment provided by an embodiment of the present application. After the vehicle body controller obtains the expected load torque of the power element, it controls the power element to adjust the actual working torque to the expected load torque.

[0118] In a possible implementation, the vehicle body controller continuously records the torque adjustment duration of the power element. When the torque adjustment duration reaches a preset torque adjustment duration threshold, it re-obtains the current energy storage capacity of the energy storage device, and if the current energy storage capacity is less than the energy storage capacity threshold, it re-triggers the motor to enter the non-steady-state idle power generation mode.

[0119] Exemplarily, assume that the preset torque adjustment duration threshold is 30S. If the torque adjustment duration of the power element is 25S and does not reach the preset torque adjustment duration threshold of 30S, the subsequent operation of determining that the motor is in the steady-state idle power generation mode can be directly performed; if the torque adjustment duration of the power element reaches the preset torque adjustment duration threshold of 30S, it can be directly determined that the motor is not in the steady-state idle power generation mode, and then the current energy storage capacity of the energy storage device is re-obtained, and if the current energy storage capacity is less than the energy storage capacity threshold, the motor is re-triggered to enter the non-steady-state idle power generation mode.

[0120] It should be noted that the expected load torque is used to increase the system damping. Optionally, the expected load torque is set to the upper limit value to prevent exceeding the torque of the clutch engagement. From the start of the clutch engagement to entering the steady-state idle power generation, the expected load torque is not unloaded to prevent the motor reducer from oscillating after unloading, which may cause the torque of the motor or engine to be too large; in addition, after applying the expected load torque, the motor single-stage reducer oscillation and abnormal noise can be effectively eliminated, and the NVH performance of entering the idle charging mode in place can be effectively improved.

[0121] Based on the above method steps, the self-check operation for abnormal situations can be realized, and to a certain extent, the consumption of the resources of the vehicle body controller itself is saved, that is, there is no need to wait for judging whether the motor transceiver enters the steady-state idle power generation mode in case of abnormal situations.

[0122] S3034: If the expected load torque meets the preset steady-state idle power generation condition, determine that the motor is in the steady-state idle power generation mode.

[0123] Optionally, if the expected load torque does not meet the preset steady-state idle power generation condition, it can be determined that the motor is not in the steady-state idle power generation mode, and the clutch engagement torque needs to be obtained through the torque sensor according to the preset torque acquisition period.

[0124] Based on the above method steps for idle power generation control of the motor, refer to Figure 9 As shown, it is a schematic diagram of a specific application scenario of an idle power generation control method provided by an embodiment of the present application. When the vehicle body controller determines that the motor M is in the non-steady-state idle power generation mode, it can obtain the expected motor speed Exp.Idle.Spd of the motor M, that is, 3140 r / min, based on the target idle speed Tar.Idle.Spd corresponding to the steady-state idle power generation mode (for example, 2820 r / min) and the preset speed deviation amount Dev.Spd (for example, 320 r / min); then, adjust the current motor speed Atp.Idle.Spd of the motor M (for example, 2935 r / min) to the expected motor speed Exp.Idle.Spd; further, obtain the clutch engagement torque through the torque sensor Sensor.Tor according to the preset torque acquisition period (for example, 1 s) until the motor is in the steady-state idle power generation mode.

[0125] In summary, in the idle power generation control method provided by the embodiment of the present application, when the vehicle body controller determines that the motor is in the non-steady-state idle power generation mode, it obtains the expected motor speed of the motor based on the target idle speed corresponding to the steady-state idle power generation mode and the preset speed deviation amount, then adjusts the current motor speed of the motor to the expected motor speed, and finally, obtains the clutch engagement torque through the torque sensor according to the preset torque acquisition period until the motor is in the steady-state idle power generation mode; among them, for each obtained engagement torque, the following operations are performed: select the target load torque corresponding to the currently obtained engagement torque from the preset candidate load torque set, and then obtain the expected load torque of the power element based on the target load torque, so as to adjust the actual working torque of the power element to the expected load torque, and if the expected load torque meets the preset steady-state idle power generation condition, it is determined that the motor is in the steady-state idle power generation mode.

[0126] In this way, the current motor speed of the motor is adjusted to the expected motor speed, and then the clutch engagement torque is obtained through the torque sensor according to the preset torque acquisition period until the motor is in the steady-state idle power generation mode, avoiding the technical drawbacks in the prior art that the engine speed fluctuates due to the rotational inertia of the motor and its single-stage reducer, and the backlash of the single-stage reducer causes the pinion of the single-stage reducer to oscillate, thereby wearing the flywheel of the engine, and further seriously affecting the NVH performance of the hybrid vehicle. Therefore, during the process of the motor of the hybrid vehicle entering the steady-state idle power generation, the NVH performance of the hybrid vehicle is improved.

[0127] Furthermore, based on the same technical concept, the embodiment of the present application also provides an idle power generation control device, which can implement the above method flow of the embodiment of the present application. As Figure 10 shown, the idle power generation control device includes: an acquisition module 1001, an adjustment module 1002, and a discrimination module 1003, where:

[0128] The acquisition module 1001 is configured to, when it is determined that the motor is in the non-steady-state idle power generation mode, obtain the expected motor speed of the motor based on the target idle speed corresponding to the steady-state idle power generation mode and a preset speed deviation amount;

[0129] The adjustment module 1002 is configured to adjust the current motor speed of the motor to the expected motor speed;

[0130] The discrimination module 1003 is configured to obtain the clutch engagement torque through the torque sensor according to the preset torque acquisition period until the motor is in the steady-state idle power generation mode; wherein, for each obtained engagement torque, the following operations are performed:

[0131] Select the target load torque corresponding to the currently obtained engagement torque from the preset candidate load torque set;

[0132] Obtain the expected load torque of the power element based on the target load torque;

[0133] Adjust the actual working torque of the power element to the expected load torque;

[0134] If the expected load torque meets the preset steady-state idle power generation condition, it is determined that the motor is in the steady-state idle power generation mode.

[0135] In a possible embodiment, when it is determined that the motor is in the non-steady-state idle power generation mode, the acquisition module 1001 is specifically configured to:

[0136] During the operation of the engine, obtain the remaining energy storage capacity of the energy storage device at a set moment;

[0137] When the remaining energy storage capacity is less than a preset energy storage capacity threshold, the motor is triggered to enter the non-steady idle power generation mode.

[0138] In a possible embodiment, when it is determined that the motor is in the non-steady idle power generation mode, the obtaining module 1001 is specifically configured to:

[0139] During the operation of the engine, obtain the remaining energy storage capacity of the energy storage device at a set moment;

[0140] When the remaining energy storage capacity is less than a preset energy storage capacity threshold, trigger the engine to enter the neutral state;

[0141] When the engine is in the neutral state, trigger the motor to enter the non-steady idle power generation mode.

[0142] In a possible embodiment, during the process of adjusting the current motor speed of the motor to the expected motor speed, the adjusting module 1002 is further configured to:

[0143] Continuously record the motor speed adjustment duration of the motor;

[0144] If the motor speed adjustment duration reaches a preset speed adjustment duration threshold, stop adjusting the current motor speed of the motor to the expected motor speed.

[0145] In a possible embodiment, when obtaining the expected load torque of the power element based on the target load torque, the discrimination module 1003 is specifically configured to:

[0146] If the power element is a motor, use the target load torque as the expected load torque;

[0147] If the power element is an engine, obtain the expected load torque of the engine based on the target load torque and a preset torque offset.

[0148] In a possible embodiment, during the process of obtaining the clutch engagement torque through the torque sensor according to a preset torque acquisition period until the motor is in the steady idle power generation mode, the discrimination module 1003 is further configured to:

[0149] Continuously record the torque adjustment duration of the power element;

[0150] When the torque adjustment duration reaches a preset torque adjustment duration threshold, re-obtain the current energy storage capacity of the energy storage device;

[0151] If the current energy storage capacity is less than the energy storage capacity threshold, re-trigger the motor to enter the non-steady idle power generation mode.

[0152] Based on the same inventive concept, an embodiment of the present application further provides an electronic device, which can implement the idle power generation control method flow provided in the above embodiments of the present application. In one embodiment, the electronic device may be a server, a terminal device, or other electronic devices. As Figure 11 shown, the electronic device may include:

[0153] At least one processor 1101, and a memory 1102 connected to the at least one processor 1101. In the embodiments of the present application, the specific connection medium between the processor 1101 and the memory 1102 is not limited. Figure 11 In this example, it is assumed that the processor 1101 and the memory 1102 are connected through a bus 1100. The bus 1100 is Figure 11 shown as a thick line in the figure. The connection manners between other components are only for illustrative purposes and are not to be construed as limiting. The bus 1100 may be divided into an address bus, a data bus, a control bus, etc. For the sake of simplicity of representation, Figure 11 it is only shown as a single thick line in the figure, but it does not mean that there is only one bus or one type of bus. Alternatively, the processor 1101 may also be referred to as a controller, and there is no limitation on the name.

[0154] In the embodiments of the present application, the memory 1102 stores instructions that can be executed by the at least one processor 1101. By executing the instructions stored in the memory 1102, the at least one processor 1101 can execute an idle power generation control method described above. The processor 1101 can implement Figure 10 the functions of each module in the device shown in the figure.

[0155] Among them, the processor 1101 is the control center of the device, which can connect various parts of the entire control device through various interfaces and lines. By running or executing the instructions stored in the memory 1102 and calling the data stored in the memory 1102, the various functions of the device and the data are processed, so as to monitor the device as a whole.

[0156] In a possible design, the processor 1101 may include one or more processing units. The processor 1101 may integrate an application processor and a modem processor. Among them, the application processor mainly processes the operating system, user interface, application programs, etc., and the modem processor mainly processes wireless communications. It can be understood that the above modem processor may not be integrated into the processor 1101. In some embodiments, the processor 1101 and the memory 1102 may be implemented on the same chip, and in some embodiments, they may also be implemented on separate chips respectively.

[0157] The processor 1101 may be a general-purpose processor, such as a CPU, a digital signal processor, an application specific integrated circuit, a field programmable gate array, or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and may implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of an idle power generation control method disclosed in combination with the embodiments of the present application may be directly embodied as being executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.

[0158] The memory 1102, as a non-volatile computer-readable storage medium, can be used to store non-volatile software programs, non-volatile computer-executable programs, and modules. The memory 1102 may include at least one type of storage medium, for example, it may include flash memory, a hard disk, a multimedia card, a card-type memory, a random access memory (RAM), a static random access memory (SRAM), a programmable read-only memory (PROM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a magnetic memory, a magnetic disk, an optical disk, and so on. The memory 1102 is any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory 1102 in the embodiments of the present application may also be a circuit or any other device capable of implementing a storage function, for storing program instructions and / or data.

[0159] By designing and programming the processor 1101, the code corresponding to the idle power generation control method introduced in the foregoing embodiments can be solidified into the chip, so that the chip can execute Figure 3 the steps of an idle power generation control method of the embodiment shown. How to design and program the processor 1101 is well-known to those skilled in the art and will not be elaborated here.

[0160] Based on the same inventive concept, the embodiments of the present application also provide a storage medium that stores computer instructions, and when the computer instructions run on a computer, the computer is caused to execute an idle power generation control method described above.

[0161] In some possible embodiments, various aspects of the idle power generation control method provided in this application can also be implemented in the form of a program product, which includes program code. When the program product runs on a device, the program code is used to cause the control device to execute the steps in an idle power generation control method according to various exemplary embodiments of this application described above in this specification.

[0162] It should be noted that although several units or subunits of the device are mentioned in the above detailed description, this division is merely exemplary and not mandatory. In fact, according to the embodiments of this application, the features and functions of the two or more units described above can be embodied in one unit. Conversely, the features and functions of one unit described above can be further divided and embodied by multiple units.

[0163] In addition, although the operations of the method of this application are described in a specific order in the drawings, this does not require or imply that these operations must be performed in that specific order, or that all the operations shown must be performed to achieve the desired result. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step for execution, and / or one step may be decomposed into multiple steps for execution.

[0164] Those skilled in the art should understand that the embodiments of this application can be provided as a method, a system, or a computer program product. Therefore, this application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, this application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0165] This application is described with reference to the flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the embodiments of this application. It should be understood that each flow and / or block in the flowchart and / or block diagram, and the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a server, such that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for implementing the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0166] Program code for performing the operations of this application can be written using any combination of one or more programming languages, including object-oriented programming languages such as Java, C++, etc., and also including conventional procedural programming languages such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computing device, partially on the user's device, executed as a stand-alone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0167] In cases involving a remote computing device, the remote computing device can be connected to the user's computing device through any kind of network, including a local area network (LAN) or a wide area network (WAN), or, it can be connected to an external computing device (e.g., by connecting through the Internet using an Internet service provider).

[0168] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory produce a manufactured article including an instruction device that implements the functions specified in one process Figure 1 one process or multiple processes and / or blocks Figure 1 or multiple blocks.

[0169] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are performed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one process Figure 1 one process or multiple processes and / or blocks Figure 1 or multiple blocks.

[0170] Obviously, those skilled in the art can make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, this application also intends to include these changes and modifications.

Claims

1. An idle power generation control method, characterized in that, Applied to a hybrid vehicle, including: When it is determined that the motor is in the non-steady-state idle power generation mode, based on the target idle speed corresponding to the steady-state idle power generation mode and a preset speed deviation amount, obtain the expected motor speed of the motor; Adjust the current motor speed of the motor to the expected motor speed; Through a torque sensor, obtain the clutch engagement torque according to a preset torque acquisition period until the motor is in the steady-state idle power generation mode; wherein, for each obtained engagement torque, perform the following operations: Select a target load torque corresponding to the currently obtained engagement torque from a preset candidate load torque set; Based on the target load torque, obtain the expected load torque of the power component; Adjust the actual working torque of the power component to the expected load torque; If the expected load torque meets the preset steady-state idle power generation condition, determine that the motor is in the steady-state idle power generation mode; Continuously record the torque adjustment duration of the power component; When the torque adjustment duration reaches a preset torque adjustment duration threshold, re-obtain the current energy storage capacity of the energy storage device; If the current energy storage capacity is less than the energy storage capacity threshold, re-trigger the motor to enter the non-steady-state idle power generation mode.

2. The method according to claim 1, wherein The determination that the motor is in the non-steady-state idle power generation mode includes: During the operation of the engine, obtain the remaining energy storage capacity of the energy storage device at a set moment; When the remaining energy storage capacity is less than a preset energy storage capacity threshold, trigger the motor to enter the non-steady-state idle power generation mode.

3. The method according to claim 1, characterized in that The determination that the motor is in the non-steady-state idle power generation mode includes: During the operation of the engine, obtain the remaining energy storage capacity of the energy storage device at a set moment; When the remaining energy storage capacity is less than a preset energy storage capacity threshold, trigger the engine to enter the neutral state; When the engine is in the neutral state, trigger the motor to enter the non-steady-state idle power generation mode.

4. The method according to claim 1, wherein During the process of adjusting the current motor speed of the motor to the expected motor speed, it further includes: Continuously record the motor speed adjustment duration of the motor; If the motor speed adjustment duration reaches a preset speed adjustment duration threshold, stop adjusting the current motor speed of the motor to the expected motor speed.

5. The method according to any one of claims 1 to 4, characterized in that The obtaining of the expected load torque of the power component based on the target load torque includes: If the power component is the motor, use the target load torque as the expected load torque; If the power component is the engine, based on the target load torque and a preset torque offset, obtain the expected load torque of the engine.

6. An idle power generation control device, characterized in that, Including: An acquisition module, configured to, when it is determined that the motor is in the non-steady-state idle power generation mode, based on the target idle speed corresponding to the steady-state idle power generation mode and a preset speed deviation amount, obtain the expected motor speed of the motor; An adjustment module, configured to adjust the current motor speed of the motor to the expected motor speed; A discrimination module, configured to obtain the clutch engagement torque through a torque sensor according to a preset torque acquisition period until the motor is in a steady-state idle power generation mode; wherein, for each obtained engagement torque, the following operations are performed: Select a target load torque corresponding to the currently obtained engagement torque from a preset candidate load torque set; Obtain the expected load torque of the power element based on the target load torque; Adjust the actual working torque of the power element to the expected load torque; If the expected load torque meets the preset steady-state idle power generation condition, determine that the motor is in the steady-state idle power generation mode; Continuously record the torque adjustment duration of the power element; When the torque adjustment duration reaches a preset torque adjustment duration threshold, re-obtain the current energy storage capacity of the energy storage device; If the current energy storage capacity is less than the energy storage capacity threshold, re-trigger the motor to enter the non-steady-state idle power generation mode.

7. The device according to claim 6, characterized in that, When it is determined that the motor is in the non-steady-state idle power generation mode, the acquisition module is specifically configured to: During the operation of the engine, obtain the remaining energy storage capacity of the energy storage device at a set moment; When the remaining energy storage capacity is less than a preset energy storage capacity threshold, trigger the motor to enter the non-steady-state idle power generation mode.

8. The device according to claim 6, characterized in that, When it is determined that the motor is in the non-steady-state idle power generation mode, the acquisition module is specifically configured to: During the operation of the engine, obtain the remaining energy storage capacity of the energy storage device at a set moment; When the remaining energy storage capacity is less than a preset energy storage capacity threshold, trigger the engine to enter the neutral state; When the engine is in the neutral state, trigger the motor to enter the non-steady-state idle power generation mode.

9. The device according to claim 6, characterized in that, During the process of adjusting the current motor speed of the motor to the expected motor speed, the adjustment module is further configured to: Continuously record the motor speed adjustment duration of the motor; If the motor speed adjustment duration reaches a preset speed adjustment duration threshold, stop adjusting the current motor speed of the motor to the expected motor speed.

10. The device according to any one of claims 6-9, characterized in that When obtaining the expected load torque of the power element based on the target load torque, the discrimination module is specifically configured to: If the power element is the motor, use the target load torque as the expected load torque; If the power element is the engine, obtain the expected load torque of the engine based on the target load torque and a preset torque offset; 11. An electronic device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the computer program, the method described in any one of claims 1-5 is implemented.

12. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, the steps of the method described in any one of claims 1-5 are implemented.

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