Eddy current retarder control method and device, electronic equipment and storage medium

Abstract

The invention provides an eddy current retarder control method and device, electronic equipment and a storage medium, and relates to the technical field of automobile auxiliary braking, and the method comprises the steps that under the conditions that the pressure of a braking main oil cylinder is lower than a preset minimum threshold value and a braking depth signal exceeds a minimum threshold value, an eddy current hand switch is controlled to respond to eddy current braking; under the condition that Ready of the whole vehicle falls off, the eddy current braking force is increased according to the braking depth signal; and under the condition that the whole vehicle runs normally, eddy current gears are gradually increased according to the braking depth. Different eddy current braking strategies are adopted according to different conditions of the braking system, and therefore the technical problem that eddy current control is not matched with mechanical braking and electric feedback braking of the new energy vehicle is solved.

Description

Technical Field

[0001] This invention relates to the field of automotive auxiliary braking technology, specifically to an eddy current retarder control method, device, electronic equipment, and storage medium. Background Technology

[0002] An eddy current retarder (also known as an electric brake) is an auxiliary braking device for automobiles based on the principle of electromagnetic induction. It is primarily installed between the drive axle and the transmission and consists of a stator, rotor, and a fixed bracket. It generates a magnetic field by energizing the stator coils. The rotating rotor cuts the magnetic field lines, creating eddy currents that generate braking torque and convert kinetic energy into heat energy, achieving non-contact braking. This device is widely used in heavy-duty vehicles and high-grade buses. The eddy current retarder has a response time of up to 40ms, can handle over 80% of the braking load, and supports multi-level braking force adjustment. A manual eddy current retarder switch is typically installed in the driver's cab, with different positions corresponding to different braking forces: 0 (no braking); 1 (25% braking force); 2 (50% braking force); 3 (75% braking force); and 4 (100% braking force).

[0003] An eddy current retarder is a relatively independent and responsive auxiliary braking system, usually used in conjunction with conventional mechanical brakes. The eddy current retarder uses the vehicle's low-voltage (usually 24V) power supply system to ensure that the eddy current retarder function is relatively independent and reliable.

[0004] However, eddy current control is incompatible with the characteristics of new energy vehicles. Because eddy current controllers are characterized by fast response and strong braking force, in emergency braking scenarios, the driver can directly trigger eddy current braking by selecting the eddy current hand switch and choosing any eddy current braking gear. When the eddy current braking force is suddenly superimposed on the vehicle's braking system, it can easily cause severe jerking, and in severe cases, may lead to wheel lock-up, resulting in a serious risk of loss of vehicle control. New energy vehicles, compared to traditional fuel vehicles, have added an electro-regenerative braking system. Therefore, new energy heavy trucks equipped with eddy current brakes possess a combination of mechanical braking, electro-regenerative braking, and eddy current braking. The eddy current braking system is relatively independent and is typically only used briefly when mechanical braking fails or when descending steep slopes under heavy load. In this case, the eddy current braking force is directly superimposed on the current vehicle braking force. Summary of the Invention

[0005] In view of this, it is necessary to provide an eddy current retarder control method, device, electronic device and storage medium to solve the technical problem of the incompatibility between eddy current control and the mechanical braking and electro-regenerative braking of new energy vehicles.

[0006] To address the aforementioned problems, in a first aspect, the present invention provides a method for controlling an eddy current retarder, comprising: When the pressure of the master cylinder is lower than the preset minimum threshold and the braking depth signal exceeds the minimum threshold, the control eddy current manual switch responds to eddy current braking. When the entire vehicle is ready, increase the eddy current braking force based on the braking depth signal; Under normal vehicle operation, gradually increase the eddy current gear according to the braking depth.

[0007] In one possible implementation, the eddy current retarder control method further includes: The coasting feedback torque is calibrated based on the retarder gear position, and braking is performed based on the coasting feedback torque.

[0008] In one possible implementation, the eddy current retarder control method further includes: The braking feedback torque is calibrated based on the retarder gear position, and braking is performed based on the braking feedback torque.

[0009] In one possible implementation, the eddy current retarder control method further includes: When the retarder request is set to 0, the eddy current braking force is stopped. When the retarder request is in gear 1-4 and the brake master cylinder pressure is lower than the preset minimum threshold, the control eddy current braking response eddy current manual switch is set to gear 1.

[0010] In one possible implementation, the eddy current retarder control method further includes: When the retarder request is in gear 1-4 and the vehicle is ready, the electric eddy current braking force is increased based on the braking depth signal.

[0011] In one possible implementation, the eddy current retarder control method further includes: Under normal conditions where the retarder request is in gears 1-4, the eddy current gear is gradually increased according to the braking depth, and the brake pedal depth thresholds for eddy current entry and exit are increased respectively.

[0012] In one possible implementation, the eddy current retarder control method further includes: When the retarder request is gear 1-4 and the eddy current brake drive is in normal condition, control the eddy current brake drive to output according to the target gear. When the retarder request is gear 1-4 and multiple gear requests for eddy current braking are valid, control the eddy current braking drive to execute the highest gear among the multiple gear requests; When the retarder requests gears 1-4 and the eddy current braking drive for the target gear is faulty, the eddy current braking drive is controlled to output the highest gear below the target gear that is free from drive faults.

[0013] In a second aspect, the present invention also provides an eddy current retarder control device, comprising: The first control module is used to control the eddy current manual switch to respond to eddy current braking when the pressure of the brake master cylinder is lower than the preset minimum threshold and the braking depth signal exceeds the minimum threshold. The second control module is used to increase the eddy current braking force based on the braking depth signal when the vehicle is out of Ready condition. The third control module is used to gradually increase the electric eddy current gear according to the braking depth when the vehicle is running normally.

[0014] Thirdly, the present invention also provides an electronic device, including a memory and a processor, wherein, The memory is used to store programs; The processor, coupled to the memory, is configured to execute the program stored in the memory to implement the steps of the eddy current retarder control method as described in any of the preceding claims.

[0015] Fourthly, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the eddy current retarder control method as described in any of the preceding claims.

[0016] The beneficial effects of adopting the above implementation method are as follows: The eddy current retarder control method, device, electronic equipment, and storage medium provided by this invention classify the application scenarios of the entire vehicle based on the characteristics of mechanical braking, electro-regenerative braking, and eddy current braking of new energy vehicles. For example, different eddy current braking strategies are adopted for different situations, such as the braking system being in adverse conditions, the vehicle being out of readiness, and normal conditions. In adverse conditions, i.e., when the brake master cylinder pressure is lower than a preset minimum threshold and the braking depth signal exceeds a minimum threshold, the mechanical braking performance is reduced. As soon as the braking depth signal exceeds the minimum threshold, eddy current braking is immediately activated according to the eddy current manual switch. In the vehicle being out of readiness, electro-regenerative braking fails, and the eddy current braking force is increased according to the braking depth signal. Under normal conditions, the eddy current gear is gradually increased according to the braking depth.

[0017] This invention adopts different eddy current braking strategies depending on the different conditions of the braking system, thereby solving the technical problem of the incompatibility between eddy current control and the mechanical braking and electro-regenerative braking of new energy vehicles. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A flowchart of an embodiment of the eddy current retarder control method provided by the present invention; Figure 2 This is a schematic diagram illustrating the process of obtaining the gliding feedback torque provided by the present invention. Figure 3 A schematic diagram illustrating the process of obtaining braking feedback torque provided by the present invention; Figure 4 A schematic diagram of the eddy current braking response eddy current manual switch position provided by the present invention; Figure 5 This is one of the schematic diagrams provided by the present invention for increasing the electric eddy current braking force based on the braking depth signal when the whole vehicle is off-ready; Figure 6 This is the second schematic diagram of the invention showing the increase of electric eddy current braking force based on the braking depth signal when the whole vehicle is off Ready; Figure 7 The third schematic diagram provided by the present invention illustrates the addition of eddy current braking force based on braking depth signal when the vehicle is ready; Figure 8 The fourth schematic diagram provided by the present invention illustrates the increase of eddy current braking force based on the braking depth signal when the vehicle is ready. Figure 9 A schematic block diagram of an embodiment of the eddy current retarder control device provided by the present invention; Figure 10 A schematic diagram of an embodiment of the electronic device provided by the present invention. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] In the description of the embodiments of this application, unless otherwise stated, "a plurality of" means two or more.

[0022] In this embodiment of the invention, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, apparatus, product or device that includes a series of steps or modules is not necessarily limited to those steps or modules that are explicitly listed, but may include other steps or modules that are not explicitly listed or that are inherent to such process, method, product or device.

[0023] The naming or numbering of steps in the embodiments of the present invention does not mean that the steps in the method flow must be executed in the time / logical order indicated by the naming or numbering. The execution order of the named or numbered process steps can be changed according to the technical purpose to be achieved, as long as the same or similar technical effect can be achieved.

[0024] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0025] Existing eddy current control systems have the following problems: The operation is complicated. In an emergency, the driver needs to step on the brake and manually select the eddy current hand switch position, which increases the risk of driver response failure. Risk of misoperation: Because the electric eddy current braking does not take into account the driver's current state, for example, when the driver is driving at full throttle under full load climbing conditions, if the driver mistakenly switches the climbing gear to the electric eddy current manual switch, even if the throttle is full, it will cause the vehicle to brake immediately, which may lead to the vehicle rolling backward or other risks of loss of control. The braking jerks and wheel lock-up are caused by the fact that eddy current braking does not take into account electric braking force and mechanical braking force. When eddy current braking intervenes immediately, it may cause wheel lock-up, which may further worsen the vehicle's condition in emergency situations. For example, when going downhill fully loaded and suddenly encountering an emergency, if you slam on the brakes and select the highest gear for eddy current braking, the wheels may lock up, resulting in reduced braking effect and loss of steering control.

[0026] To address the aforementioned problems, this invention provides an eddy current retarder control method, apparatus, electronic device, and storage medium, which will be described below.

[0027] This invention provides a method for controlling an eddy current retarder, which can be implemented by executing an application program on a VCU (Vehicle Control Unit). Figure 1 As shown, the method includes: S101. When the pressure of the master cylinder is lower than the preset minimum threshold and the braking depth signal exceeds the minimum threshold, control the eddy current manual switch to respond to eddy current braking.

[0028] Understandably, the eddy current hand switch directly controls the eddy current braking. Once the vehicle is powered on with low voltage, the eddy current retarder is activated and can respond to the eddy current hand switch's request at any time.

[0029] The eddy current braking response is reliable. As long as the vehicle's low-voltage power supply system is normal, the vehicle can be guaranteed to respond to the eddy current braking demand when needed.

[0030] S102. When the vehicle is ready, increase the electric eddy current braking force based on the braking depth signal.

[0031] Understandably, "vehicle dropping out of Ready" usually refers to the unexpected disappearance or inability to maintain the vehicle's Ready status, which may affect starting or driving. The Ready status is indicated by a light on the dashboard of a new energy or hybrid vehicle, signifying that the vehicle has completed self-checks, the high-voltage system has been activated, and it is ready to drive.

[0032] The braking depth signal can be obtained in the following way: Reading data via OBD (On-Board Diagnostics) interface: Using professional automotive diagnostic tools, connect to the vehicle's OBD interface to communicate with the vehicle's ECU and directly obtain real-time data such as brake pedal travel and brake pressure.

[0033] Direct signal acquisition: Based on the vehicle's circuit diagram, locate the brake signal wire (e.g., by measuring voltage changes) and directly acquire the signal using a multimeter or similar equipment.

[0034] Relying on onboard sensors: Modern vehicles are typically equipped with brake pedal sensors, which convert the pressure and speed of the brake pedal into electrical signals that are transmitted to the vehicle's computer, thus indirectly reflecting the braking depth.

[0035] S103. Under normal vehicle operation, gradually increase the electric eddy current gear according to the braking depth.

[0036] Understandably, for the vehicle to operate normally, the brake master cylinder pressure may be higher than the set minimum threshold, and the vehicle may not fall into a Ready state.

[0037] This invention decouples the eddy current hand switch from the eddy current braking system, ensuring that the entire vehicle braking system (mechanical braking + regenerative braking + eddy current braking) works in tandem to meet the driver's braking needs. The VCU (Vehicle Controller Unit) receives the hard-wired signal from the eddy current hand switch. Based on the eddy current hand switch position, brake depth, throttle depth, gear position, and the vehicle Ready (drivable state) signal, the VCU logically controls the engagement of eddy current relays at different gear positions, thereby enabling coordinated use of eddy current braking with other braking methods in the vehicle.

[0038] It should be noted that the three steps in this embodiment do not have a specific execution order. The corresponding steps can be executed separately according to the specific identification situation, that is, they can be executed in any order.

[0039] In some embodiments, the eddy current retarder control method further includes: The coasting feedback torque is calibrated based on the retarder gear position, and braking is performed based on the coasting feedback torque.

[0040] As can be understood, coasting regenerative torque refers to the braking torque generated when the drive motor switches to generator mode during vehicle coasting, converting the vehicle's kinetic energy into electrical energy and recovering it for the battery through regenerative braking. This is coordinated and controlled by the vehicle control unit (VCU) based on real-time operating conditions to achieve a balance between energy recovery and driving smoothness.

[0041] like Figure 2 As shown, the coasting feedback torque is calibrated based on the retarder gear. The higher the retarder gear, the greater the coasting feedback torque. The coasting feedback torque is obtained by consulting a one-dimensional table according to the vehicle speed for each retarder gear from 0 to 4.

[0042] In some embodiments, the eddy current retarder control method further includes: The braking feedback torque is calibrated based on the retarder gear position, and braking is performed based on the braking feedback torque.

[0043] As can be understood, regenerative braking torque is the negative torque applied by the motor controller during braking in an electric vehicle, causing the motor to switch to a generator state, converting the vehicle's kinetic energy into electrical energy to recharge the battery, thus achieving energy recovery.

[0044] When the driver presses the brake pedal, the motor controller outputs a negative torque, and the motor enters generator mode. The generated electrical energy is rectified and then recharged back into the battery.

[0045] like Figure 3 As shown, the brake feedback torque is calibrated based on the retarder gear. The higher the retarder gear, the greater the brake feedback torque. For retarder gears 0-4, the brake recovery torque is obtained by consulting a two-dimensional table based on vehicle speed and brake pedal depth.

[0046] In some embodiments, the eddy current retarder control method further includes: When the retarder request is set to 0, the eddy current braking force is stopped. When the retarder request is in gear 1-4 and the brake master cylinder pressure is lower than the preset minimum threshold, the control eddy current braking response eddy current manual switch is set to gear 1.

[0047] Understandably, when the retarder request is at position 0, eddy current braking is not required, and therefore the output of eddy current braking force can be stopped. When the pressure in the master cylinder of the brake falls below the set minimum threshold, the eddy current braking immediately responds to the eddy current manual switch position, such as... Figure 4 As shown. Here, 1-4 gears include: gear 1, gear 2, gear 3, and gear 4.

[0048] In some embodiments, the eddy current retarder control method further includes: When the retarder request is in gear 1-4 and the vehicle is ready, the electric eddy current braking force is increased based on the braking depth signal.

[0049] Understandably, when the entire vehicle is ready, the eddy current braking force is increased based on the braking depth signal, such as... Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown. The 1-4 gears here include: gear 1, gear 2, gear 3, and gear 4.

[0050] In some embodiments, the eddy current retarder control method further includes: Under normal conditions where the retarder request is in gears 1-4, the eddy current gear is gradually increased according to the braking depth, and the brake pedal depth thresholds for eddy current entry and exit are increased respectively.

[0051] Under normal circumstances, the VCU gradually increases the eddy current gear according to the braking depth, which is consistent with the control logic above when the retarder requests gears 1-4 and the vehicle is out of Ready mode. The brake pedal depth thresholds for eddy current entry and exit are increased by 5% respectively. Here, gears 1-4 include: gear 1, gear 2, gear 3, and gear 4.

[0052] In some embodiments, the eddy current retarder control method further includes: When the retarder request is gear 1-4 and the eddy current brake drive is in normal condition, control the eddy current brake drive to output according to the target gear. When the retarder request is gear 1-4 and multiple gear requests for eddy current braking are valid, control the eddy current braking drive to execute the highest gear among the multiple gear requests; When the retarder requests gears 1-4 and the eddy current braking drive for the target gear is faulty, the eddy current braking drive is controlled to output the highest gear below the target gear that is free from drive faults.

[0053] It is understandable that gears 1-4 here include: gear 1, gear 2, gear 3, and gear 4. Troubleshooting eddy current brake drive malfunctions: When the eddy current braking drive is in normal working condition, the eddy current braking drive outputs according to the target gear. When multiple gear requests for eddy current braking are valid, the highest gear shall be executed. When the eddy current brake drive fails, the highest gear output is used when there is no drive failure. For example, if a request is made for 3rd gear but the 3rd gear drive is faulty, then an eddy current will be output to brake to 2nd gear. The target for eddy current braking is gear 1. If gear 1 fails, eddy current braking output is prohibited.

[0054] In some embodiments, the vehicle scenario adaptation provided by the present invention includes: The worst-case scenario for the braking system is when the pressure in the master cylinder is lower than the set minimum threshold. In this case, the mechanical braking performance is reduced. As long as the braking depth signal exceeds the minimum threshold, the eddy current braking will be activated immediately according to the eddy current hand switch.

[0055] When the vehicle is ready, the regenerative braking fails. At this point, the electric eddy current braking force is increased based on the braking depth signal.

[0056] Under normal circumstances, the VCU gradually increases the eddy current gear according to the braking depth.

[0057] The coordinated control strategy for the vehicle braking system includes: The coasting feedback torque is calibrated based on the retarder setting; the higher the retarder setting, the greater the coasting feedback torque. For retarder settings 0-4, the coasting feedback torque is obtained by consulting a one-dimensional table according to the vehicle speed.

[0058] The brake feedback torque is calibrated based on the retarder gear position; the higher the retarder gear, the greater the brake feedback torque. For retarder gears 0-4, the brake recovery torque is obtained by consulting a two-dimensional table based on vehicle speed and brake pedal depth.

[0059] When the retarder request is at level 0, there is no eddy current braking force. When the retarder request is at levels 1-4, the eddy currents are output according to the following logic, and the corresponding eddy current levels for the brake pedal depth can be calibrated: When the pressure in the master cylinder of the brake is lower than the set minimum threshold, the eddy current brake immediately responds to the eddy current manual switch position: The entire vehicle is ready. At this point, increase the eddy current braking force based on the braking depth signal: Under normal circumstances, the VCU gradually increases the eddy current level according to the braking depth. This is consistent with the control logic of the vehicle going Ready when the retarder requests levels 1-4. The brake pedal depth thresholds for eddy current entry and exit are increased by 5% respectively.

[0060] Troubleshooting for eddy current braking drives includes: When the eddy current braking drive is in normal working condition, the eddy current braking drive outputs according to the target gear. When multiple gear requests for eddy current braking are valid, the highest gear shall be executed. When the eddy current brake drive fails, the highest gear output is used when there is no drive failure. For example, if a request is made for 3rd gear but the 3rd gear drive is faulty, then an eddy current will be output to brake to 2nd gear. The target for eddy current braking is gear 1. If gear 1 fails, eddy current braking output is prohibited.

[0061] The present invention has the following technical effects: To improve overall vehicle driving convenience, for specific heavy-duty truck usage scenarios, continuous operation can be achieved simply by selecting the appropriate retarder manual switch position. For example, when a heavy-duty truck is unloaded going uphill and fully loaded going downhill at a 10° gradient, experience shows that with the retarder manual switch at position 2, eddy current braking will not be triggered during normal uphill driving unless the brakes are applied deeply. When going downhill, coasting or light braking corresponds to the vehicle's coasting feedback and braking feedback torque at position 2, allowing the downhill speed to be controlled within a safe range. In case of emergencies, applying the brakes deeply will trigger eddy current braking, which will disengage upon releasing the brakes. This solution reduces the complexity of driver operation while ensuring the vehicle's braking safety and reliability.

[0062] This system improves response speed and reduces safety risks. When a new energy heavy-duty truck experiences a sudden high-voltage drop, the risk can be minimized. After a high-voltage drop, the high-pressure oil pump immediately stops working, and the mechanical braking pressure may be insufficient. Simultaneously, the drive motor controller cannot respond to feedback torque requests under high-voltage conditions. Based on this solution, the eddy current braking will respond immediately based on the position of the retarder manual switch, quickly reducing the vehicle speed and avoiding the need to operate the retarder manual switch after the high-voltage drop, thus preventing further system deterioration.

[0063] The adaptive open-loop hill descent control system is based on the following scheme: the higher the retarder manual switch setting, the greater the coasting and braking feedback torque; the higher the vehicle speed, the greater the braking feedback torque. Theoretically, the driver can select different retarder manual switch settings to correspond to different downhill stable speeds without pressing the brake or accelerator. When it is necessary to increase the vehicle speed, the retarder manual switch setting should be lowered or the accelerator should be lightly pressed; when it is necessary to decrease the vehicle speed, the retarder manual switch setting should be raised or the brake should be lightly pressed.

[0064] like Figure 9As shown, the present invention also provides an eddy current retarder control device 900, comprising: The first control module 901 is used to control the eddy current manual switch to respond to eddy current braking when the pressure of the brake master cylinder is lower than the preset minimum threshold and the braking depth signal exceeds the minimum threshold. The second control module 902 is used to increase the electric eddy current braking force based on the braking depth signal when the whole vehicle is off Ready. The third control module 903 is used to gradually increase the electric eddy current gear according to the braking depth when the vehicle is running normally.

[0065] The eddy current retarder control device provided in the above embodiments can realize the technical solutions described in the above eddy current retarder control method embodiments. The specific implementation principles of each module or unit can be found in the corresponding content in the above eddy current retarder control method embodiments, which will not be repeated here.

[0066] like Figure 10 As shown, the present invention also provides an electronic device 1000, which can be a vehicle controller. The electronic device 1000 includes a processor 1001 and a storage device 1002. Figure 10 Only some components of the electronic device 1000 are shown, but it should be understood that it is not required to implement all the components shown, and more or fewer components may be implemented instead.

[0067] In some embodiments, memory 1002 may be an internal storage unit of electronic device 1000, such as a hard disk or memory of electronic device 1000. In other embodiments, memory 1002 may also be an external storage device of electronic device 1000, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc. equipped on electronic device 1000.

[0068] Furthermore, the memory 1002 includes both internal storage units of the electronic device 1000 and external storage devices. The memory 1002 is used to store application software and various types of data installed on the electronic device 1000.

[0069] In some embodiments, processor 1001 may be a central processing unit (CPU), microprocessor, or other data processing chip, used to run program code stored in memory 1002 or process data, such as the eddy current retarder control method of the present invention.

[0070] The components 1001-1002 of the electronic device 1000 communicate with each other via the system bus.

[0071] In some embodiments of the present invention, when the processor 1001 executes the eddy current retarder control program in the memory 1002, the following steps can be implemented: When the pressure of the master cylinder is lower than the preset minimum threshold and the braking depth signal exceeds the minimum threshold, the control eddy current manual switch responds to eddy current braking. When the entire vehicle is ready, increase the eddy current braking force based on the braking depth signal; Under normal vehicle operation, gradually increase the eddy current gear according to the braking depth.

[0072] It should be understood that when the processor 1001 executes the eddy current retarder control program in the memory 1002, in addition to the functions mentioned above, it can also perform other functions, as can be found in the description of the corresponding method embodiments above.

[0073] Furthermore, the embodiments of the present invention do not specifically limit the type of the electronic device 1000 mentioned. The electronic device 1000 can be a mobile phone, tablet computer, personal digital assistant (PDA), wearable device, laptop computer, or other portable electronic device. Exemplary embodiments of portable electronic devices include, but are not limited to, portable electronic devices running iOS, Android, Microsoft, or other operating systems. The aforementioned portable electronic device can also be other portable electronic devices, such as a laptop computer with a touch-sensitive surface (e.g., a touch panel). It should also be understood that in some other embodiments of the present invention, the electronic device 1000 may not be a portable electronic device, but rather a desktop computer with a touch-sensitive surface (e.g., a touch panel).

[0074] In another aspect, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the eddy current retarder control method provided by the methods described above, the method comprising: When the pressure of the master cylinder is lower than the preset minimum threshold and the braking depth signal exceeds the minimum threshold, the control eddy current manual switch responds to eddy current braking. When the entire vehicle is ready, increase the eddy current braking force based on the braking depth signal; Under normal vehicle operation, gradually increase the eddy current gear according to the braking depth.

[0075] Those skilled in the art will understand that all or part of the processes of the methods described in the above embodiments can be implemented by a computer program instructing related hardware, and the program can be stored in a computer-readable storage medium. The computer-readable storage medium may be a disk, optical disk, read-only memory, or random access memory, etc.

[0076] The above provides a detailed description of the eddy current retarder control method, device, electronic equipment, and storage medium provided by the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, those skilled in the art will recognize that there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A control method for an eddy current retarder, characterized in that, include: When the pressure of the master cylinder is lower than the preset minimum threshold and the braking depth signal exceeds the minimum threshold, the control eddy current manual switch responds to eddy current braking. When the entire vehicle is ready, increase the eddy current braking force based on the braking depth signal; Under normal vehicle operation, gradually increase the eddy current gear according to the braking depth.

2. The eddy current retarder control method according to claim 1, characterized in that, Also includes: The coasting feedback torque is calibrated based on the retarder gear position, and braking is performed based on the coasting feedback torque.

3. The eddy current retarder control method according to claim 1, characterized in that, Also includes: The braking feedback torque is calibrated based on the retarder gear position, and braking is performed based on the braking feedback torque.

4. The eddy current retarder control method according to claim 1, characterized in that, Also includes: When the retarder request is set to 0, the eddy current braking force is stopped. When the retarder request is in gear 1-4 and the brake master cylinder pressure is lower than the preset minimum threshold, the control eddy current braking response eddy current manual switch is set to gear 1.

5. The eddy current retarder control method according to claim 1, characterized in that, Also includes: When the retarder request is in gear 1-4 and the vehicle is ready, the electric eddy current braking force is increased based on the braking depth signal.

6. The eddy current retarder control method according to claim 1, characterized in that, Also includes: Under normal conditions where the retarder request is in gears 1-4, the eddy current gear is gradually increased according to the braking depth, and the brake pedal depth thresholds for eddy current entry and exit are increased respectively.

7. The eddy current retarder control method according to any one of claims 1-6, characterized in that, Also includes: When the retarder request is gear 1-4 and the eddy current brake drive is in normal condition, control the eddy current brake drive to output according to the target gear. When the retarder request is gear 1-4 and multiple gear requests for eddy current braking are valid, control the eddy current braking drive to execute the highest gear among the multiple gear requests; When the retarder requests gears 1-4 and the eddy current braking drive for the target gear is faulty, the eddy current braking drive is controlled to output the highest gear below the target gear that is free from drive faults.

8. A control device for an eddy current retarder, characterized in that, include: The first control module is used to control the eddy current manual switch to respond to eddy current braking when the pressure of the brake master cylinder is lower than the preset minimum threshold and the braking depth signal exceeds the minimum threshold. The second control module is used to increase the eddy current braking force based on the braking depth signal when the vehicle is out of Ready condition. The third control module is used to gradually increase the electric eddy current gear according to the braking depth when the vehicle is running normally.

9. An electronic device, characterized in that, Including memory and processor, among which, The memory is used to store programs; The processor, coupled to the memory, is configured to execute the program stored in the memory to implement the steps of the eddy current retarder control method as described in any one of claims 1 to 7.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the eddy current retarder control method as described in any one of claims 1 to 7.

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