Method, device and equipment for verifying locking condition of electric control differential lock and medium
By testing the operating status of the electronically controlled differential lock under full vehicle load conditions and verifying its locking conditions, the problem of damage to the electronically controlled differential lock due to locking impact was solved, enabling normal operation under moderate locking conditions, thus improving service life and driving experience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHONGQING CHANGAN AUTOMOBILE CO LTD
- Filing Date
- 2023-12-19
- Publication Date
- 2026-07-21
AI Technical Summary
Electronically controlled differential locks are easily damaged by impacts when locking conditions are not met, affecting their service life and driving experience. Existing technology makes it difficult to effectively verify the stringency of their locking conditions.
When the vehicle is fully loaded, the system detects the vehicle's speed, torque, and the difference in drive wheel speeds to determine if the locking conditions are met. If the conditions are met, the system checks whether the electronically controlled differential lock is properly adjusted to the locked state. The system eliminates the influence of other factors and ensures a smooth locking process by collecting signal data and conducting dynamic checks.
Effectively verify the locking conditions of the electronically controlled differential lock, avoid damage caused by locking impact, ensure that the electronically controlled differential lock works normally under appropriate locking conditions, and improve service life and driving experience.
Smart Images
Figure CN117588542B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of vehicle technology, and in particular to a method for verifying the locking conditions of an electronically controlled differential lock, a device for verifying the locking conditions of an electronically controlled differential lock, an electronic device, and a computer-readable medium. Background Technology
[0002] When a vehicle travels on muddy or icy roads, some drive wheels may be on the lower traction surface while others are on the higher traction surface. With the open differential engaged, most or all of the vehicle's power output will be transferred to the drive wheel on the lower traction surface, causing it to spin freely. Meanwhile, the drive wheel on the higher traction surface may lack power or have insufficient power, preventing the vehicle from escaping the mud or icy terrain. Under suitable locking conditions, the vehicle's electronically controlled differential lock can actively or passively lock both sides of the open differential output shaft, ensuring that the drive wheels rotate at the same speed, thus assisting the vehicle in successfully escaping the mud or icy terrain.
[0003] However, when both sides of the differential output shaft are actively or passively locked, the electronically controlled differential lock will be subjected to shock. The severity of the locking conditions will directly affect the magnitude of the shock received by the electronically controlled differential lock. If the locking conditions are relatively lenient, the electronically controlled differential lock will be subjected to a greater shock; if the locking conditions are more stringent, the electronically controlled differential lock will be subjected to a smaller shock, but it may still affect the user's driving experience. Summary of the Invention
[0004] The present invention provides a method, apparatus, equipment and medium for verifying the locking conditions of an electronically controlled differential lock, so as to at least solve the problem of whether the electronically controlled differential lock will be damaged by the impact of locking.
[0005] This invention discloses a method for verifying the locking conditions of an electronically controlled differential lock, applied to a vehicle. The vehicle includes at least two drive wheels and an electronically controlled differential lock that controls the drive wheels. The locking conditions of the electronically controlled differential lock are associated with at least one of the vehicle's speed, the vehicle's torque, and the speed difference of the drive wheels. The method includes:
[0006] When the vehicle is fully loaded, the vehicle's operating status is detected; wherein, the vehicle's operating status includes at least one of the vehicle's speed, the vehicle's torque, and the difference in rotational speed between the drive wheels;
[0007] When the vehicle's operating state is detected to meet the locking condition, it is determined whether the electronically controlled differential lock is adjusted to the locked state.
[0008] When the electronically controlled differential lock is adjusted to the locked state, check whether the electronically controlled differential lock is functioning properly.
[0009] Optionally, the locking condition includes the vehicle speed being less than a preset locking speed; the step of determining whether the electronically controlled differential lock is adjusted to the locked state when the vehicle's operating state is detected to meet the locking condition further includes:
[0010] When the speed of the vehicle is detected to be less than the preset locking speed, it is determined whether the electronically controlled differential lock is adjusted to the locked state.
[0011] Optionally, the locking condition includes the torque being less than a preset locking torque; the step of determining whether the electronically controlled differential lock is adjusted to the locked state when the vehicle's operating state is detected to meet the locking condition further includes:
[0012] When the torque of the vehicle is detected to be less than the preset locking torque, it is determined whether the electronically controlled differential lock is adjusted to the locked state.
[0013] Optionally, the locking condition includes the speed difference being less than a preset locking speed difference; the step of determining whether the electronically controlled differential lock is adjusted to the locked state when the vehicle's operating state is detected to meet the locking condition further includes:
[0014] When the speed difference of the vehicle is detected to be less than the preset locking speed difference, it is determined whether the electronically controlled differential lock is adjusted to the locking state.
[0015] Optionally, the vehicle further includes tires; the step of detecting the operating status of the vehicle when the vehicle is fully loaded further includes:
[0016] The vehicle's operating status is detected when the vehicle is fully loaded and the tire pressure is within a preset range.
[0017] Optionally, when the vehicle is fully loaded, detecting the vehicle's operating status further includes:
[0018] The vehicle's operating status is detected when the vehicle is fully loaded and the coefficient of dynamic friction of the road surface on which the vehicle travels is within a preset range.
[0019] Optionally, the method further includes:
[0020] During the state adjustment process of the electronically controlled differential lock, it is detected whether there are any abnormalities in the locking and unlocking of the electronically controlled differential lock.
[0021] This invention discloses a device for verifying the locking conditions of an electronically controlled differential lock, applied to a vehicle. The vehicle includes at least two drive wheels and an electronically controlled differential lock that controls the drive wheels. The locking conditions of the electronically controlled differential lock are associated with at least one of the vehicle's speed, the vehicle's torque, and the speed difference of the drive wheels. The device includes:
[0022] A vehicle operating status detection module is used to detect the operating status of the vehicle when the vehicle is fully loaded; wherein the operating status of the vehicle includes at least one of the vehicle speed, the vehicle torque, and the difference in rotational speed of the drive wheels.
[0023] The determining module is used to determine whether the electronically controlled differential lock is adjusted to the locked state when the operating state of the vehicle is detected to meet the locking condition.
[0024] The electronically controlled differential lock detection module is used to detect whether the electronically controlled differential lock is functioning properly when it is adjusted to the locked state.
[0025] Optionally, the locking condition includes the vehicle's speed being less than a preset locking speed; the determining module further includes:
[0026] The first determining submodule is used to determine whether the electronically controlled differential lock is adjusted to the locked state when the speed of the vehicle is detected to be less than the preset locking speed.
[0027] Optionally, the locking condition includes the torque being less than a preset locking torque; the determining module further includes:
[0028] The second determining submodule is used to determine whether the electronically controlled differential lock is adjusted to the locked state when the torque of the vehicle is detected to be less than the preset locking torque.
[0029] Optionally, the locking condition includes the speed difference being less than a preset locking speed difference; the determining module further includes:
[0030] The third determining submodule is used to determine whether the electronically controlled differential lock is adjusted to the locked state when the speed difference of the vehicle is detected to be less than the preset locking speed difference.
[0031] Optionally, the vehicle further includes tires; the vehicle operating status detection module further includes:
[0032] The first vehicle operation status detection submodule is used to detect the vehicle's operation status when the vehicle is fully loaded and the tire pressure is within a preset tire pressure range.
[0033] Optionally, the vehicle operating status detection module further includes:
[0034] The second vehicle operation status detection submodule is used to detect the vehicle's operation status when the vehicle is fully loaded and the dynamic friction coefficient of the road surface is within a preset dynamic friction coefficient range.
[0035] Optionally, the device further includes:
[0036] The abnormal situation detection module is used to detect whether there are any abnormal situations in the locking and unlocking of the electronically controlled differential lock during the state adjustment process.
[0037] This invention also discloses an electronic device, including a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus;
[0038] The memory is used to store computer programs;
[0039] When the processor executes a program stored in the memory, it implements the method described in the embodiments of the present invention.
[0040] This invention also discloses one or more computer-readable media storing instructions that, when executed by one or more processors, cause the processors to perform the methods described in this invention.
[0041] The embodiments of the present invention have the following advantages:
[0042] This invention provides a method, apparatus, device, and medium for verifying the locking conditions of an electronically controlled differential lock. Applied to a vehicle, the vehicle includes at least two drive wheels and an electronically controlled differential lock that controls the drive wheels. The locking conditions involve at least one of the vehicle's speed, torque, and the speed difference between the drive wheels. When the vehicle is fully loaded, the operating state of the vehicle is detected. The vehicle's operating state includes at least one of the vehicle's speed, torque, and the speed difference between the drive wheels. When the vehicle's operating state is detected to meet the locking conditions, it is determined whether the electronically controlled differential lock has been adjusted to a locked state. If the electronically controlled differential lock is in a locked state, its normal operation is detected. If the electronically controlled differential lock is operating normally, it can be inferred that the stringency of its locking condition setting is appropriate. When the vehicle's operating state meets the locking conditions, the electronically controlled differential lock will be actively or passively adjusted to a locked state. During this process, the electronically controlled differential lock will not be damaged by the impact of locking, thus affecting its service life. Attached Figure Description
[0043] Figure 1This is a flowchart of the steps of a method for verifying the locking conditions of an electronically controlled differential lock provided in an embodiment of the present invention;
[0044] Figure 2 This is a flowchart of the steps of a method for verifying the locking conditions of an electronically controlled differential lock provided in an embodiment of the present invention;
[0045] Figure 3 This is a structural block diagram of a device for verifying the locking conditions of an electronically controlled differential lock provided in an embodiment of the present invention;
[0046] Figure 4 This is a block diagram of an electronic device provided in an embodiment of the present invention;
[0047] Figure 5 This is a schematic diagram of a computer-readable medium provided in an embodiment of the present invention. Detailed Implementation
[0048] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0049] To facilitate understanding of the technical solutions and effects of the embodiments of this application, the prior art of this application will be briefly described below.
[0050] When a vehicle travels on muddy or icy roads, the open differential will transfer all or most of the vehicle's power output to the drive wheels with lower traction, causing them to spin freely. Meanwhile, the drive wheels with higher traction may lack power, preventing the vehicle from escaping the mud or icy terrain. To improve a vehicle's ability to get out of trouble, a differential lock can be installed. A differential lock is a locking device installed on an open differential. When the vehicle's driving conditions meet the locking conditions, the electronically controlled differential lock can actively or passively lock both sides of the open differential's output shaft, outputting power to both sides of the output shaft at completely equal speeds. This ensures that the drive wheels rotate at the same speed, thus assisting the vehicle in successfully escaping mud or icy terrain.
[0051] Differential locks mainly include three types: manually operated mechanical differential locks, speed-sensitive differential locks, and electronically controlled differential locks. Among them, electronically controlled differential locks are widely used in off-road vehicles due to their advantages such as high locking flexibility and ease of operation. However, the control of electronically controlled differential locks relies entirely on electronic control logic and lacks physical control boundaries. When both sides of the differential output shaft are actively or passively locked, the locking teeth or friction plate structure of the electronically controlled differential lock will be subjected to significant load impacts, thus affecting the lifespan of the electronically controlled differential lock. The stringency of the locking conditions of the electronically controlled differential lock directly affects the magnitude of the impact it receives. If the locking conditions are relatively lenient, the impact on the electronically controlled differential lock will be greater; if the locking conditions are more stringent, the impact on the electronically controlled differential lock will be smaller, but it may affect the user's driving experience.
[0052] Reference Figure 1 This document illustrates a flowchart of the steps for verifying the locking condition of an electronically controlled differential lock according to an embodiment of the present invention. The method is applied to a vehicle, which includes at least two drive wheels and an electronically controlled differential lock that controls the drive wheels. The locking condition of the electronically controlled differential lock is associated with at least one of the vehicle's speed, the vehicle's torque, and the speed difference between the drive wheels. Specifically, it may include the following steps:
[0053] Step 101: When the vehicle is fully loaded, detect the vehicle's operating status; wherein, the vehicle's operating status includes at least one of the vehicle's speed, the vehicle's torque, and the difference in rotational speed between the drive wheels.
[0054] In this embodiment of the invention, the vehicle used to verify the locking conditions of the electronically controlled differential lock includes at least two drive wheels and an electronically controlled differential lock. When the vehicle's operating state meets the locking conditions of the electronically controlled differential lock, the electronically controlled differential lock can actively or passively lock both sides of the open differential output shaft, thereby ensuring that the speeds of the vehicle's drive wheels are consistent and improving the vehicle's ability to get out of trouble. The locking conditions of the electronically controlled differential lock are related to at least one of the vehicle's speed, the vehicle's torque, and the speed difference between the vehicle's drive wheels.
[0055] To determine whether the electronically controlled differential lock (ECL) will be damaged by impact when locked, provided the vehicle's operating conditions meet its locking criteria, the vehicle's load status needs to be set to full load. With the vehicle fully loaded, its operating status is monitored to determine if it meets the ECL's locking conditions. If, under full load, the vehicle's operating conditions meet the ECL's locking conditions, and the ECL is not damaged by impact after being locked, then it can be concluded that even when the vehicle is not fully loaded, if its operating conditions meet the ECL's locking conditions and the ECL is locked, the ECL will not be damaged by impact.
[0056] In a specific example, sandbags, counterweights, water, and personnel were used to fully load the vehicle. The weight required to fully load the vehicle was 500 kg. The tester sat in the driver's seat, with 50 kg distributed across the remaining seats and 20 kg across the floor. With the tester weighing 50 kg, 280 kg of counterweights were evenly placed in the trunk to achieve the same load. All counterweights were securely restrained using seatbelts and straps to prevent weight transfer during driving. The final actual vehicle weight deviated from the maximum designed gross weight by within ±5 kg.
[0057] In this embodiment of the invention, before verifying the locking conditions of the electronically controlled differential lock, it is checked whether the power and transmission system components installed on the vehicle meet the latest requirements of the vehicle design parameters, and whether the control software of the electronically controlled differential lock is the latest version to be verified.
[0058] In a specific example, it is checked whether the vehicle's engine, motor, battery, transmission, reducer, differential, differential lock, drive shaft, tires, and other components all meet the latest requirements of the vehicle's design parameters.
[0059] Step 102: When the vehicle's operating state is detected to meet the locking condition, determine whether the electronically controlled differential lock is adjusted to the locked state.
[0060] In this embodiment of the invention, before verifying the locking conditions of the electronically controlled differential lock, the locking conditions of the electronically controlled differential lock to be verified are determined based on the functional definition of the control software of the electronically controlled differential lock. These conditions include the locking speed, locking torque, and locking speed difference. In a specific example, the locking conditions of the vehicle equipped with the electronically controlled differential lock to be verified can typically be preset. The locking speed can be 6 km / h, 7 km / h, 8 km / h, etc.; the locking speed difference can be 60 rpm, 70 rpm, 77 rpm, 80 rpm, etc.; and the locking torque can be 60 Nm, 70 Nm, 77 Nm, 80 Nm, etc. The present invention does not impose any limitations on these conditions.
[0061] During vehicle operation, if the vehicle's operating state matches the locking conditions, it is determined whether the electronically controlled differential lock has been locked. In a specific example, it is determined whether the electronically controlled differential lock has been locked when the vehicle speed is less than the locking speed and / or the vehicle's torque is less than the locking torque and / or the speed difference between the vehicle's drive wheels is less than the locking speed difference.
[0062] In this embodiment of the invention, during the verification of the locking conditions of the electronically controlled differential lock, signals from the entire vehicle and the electronically controlled differential lock are also collected, including the status signal of the electronically controlled differential lock and the data of the signal channel corresponding to the locking conditions of the electronically controlled differential lock. This helps the tester analyze whether the stringency of the locking conditions of the electronically controlled differential lock is appropriate. The data of the signal channel corresponding to the locking conditions of the electronically controlled differential lock includes the trigger signal of the electronically controlled differential lock switch, the status signal of the electronically controlled differential lock actuator, the rotational speed signals at both ends of the electronically controlled differential lock, the vehicle speed, data from the speed difference calculation channel at both ends of the electronically controlled differential lock, and the vehicle's torque, etc.
[0063] In a specific example, the sampling frequency is 100Hz, and the list of collected vehicle signals is shown in the table below:
[0064]
[0065] Step 103: When the electronically controlled differential lock is adjusted to the locked state, check whether the electronically controlled differential lock is normal.
[0066] In this embodiment of the invention, during vehicle operation, if the vehicle's operating state matches the locking conditions, it is detected whether the electronically controlled differential lock has been adjusted to the locked state. When the electronically controlled differential lock is in the locked state, after the vehicle has finished driving, it is checked whether the locking and unlocking process of the electronically controlled differential lock is smooth, whether there are any abnormal noises during locking and unlocking, and whether the electronically controlled differential lock has been damaged by impact during locking.
[0067] In this embodiment of the invention, when the vehicle is fully loaded, its operating state is detected. The vehicle's operating state includes at least one of the following: vehicle speed, torque, and the difference in rotational speed between the drive wheels. When the vehicle's operating state meets the locking conditions, it is determined whether the electronically controlled differential lock is locked. If the electronically controlled differential lock is locked, its normal operation is checked. If the electronically controlled differential lock is operating normally, it can be inferred that the stringency of its locking conditions is appropriate. When the vehicle's operating state meets the locking conditions, the electronically controlled differential lock will be actively or passively locked. During this process, the electronically controlled differential lock will not be damaged by the impact of locking, thus affecting its service life.
[0068] Further, in any of the above embodiments, the locking condition includes the vehicle's speed being less than a preset locking speed; step 102 further includes:
[0069] Sub-step S11: When the speed of the vehicle is detected to be less than the preset locking speed, determine whether the electronically controlled differential lock is adjusted to the locking state.
[0070] In this embodiment of the invention, the locking condition of the electronically controlled differential lock includes a vehicle speed lower than the locking speed of the electronically controlled differential lock. The higher the vehicle speed, the greater the impact on the electronically controlled differential lock when it locks. In a specific example, the locking conditions of the vehicle equipped with the electronically controlled differential lock to be verified can typically be preset, and the locking speed can be 6 km / h, 7 km / h, 8 km / h, etc.
[0071] The verification process for the locking condition of the electronically controlled differential lock includes the following steps: First, while the vehicle is in motion, the electronically controlled differential lock is in the unlocked state, and the vehicle is driven in a straight line at a speed greater than the locking speed. Then, the vehicle speed is reduced, and the tester continuously attempts to lock the electronically controlled differential lock, ensuring that the lock is engaged as soon as the vehicle speed falls below the locking speed. This verification process is repeated to verify the locking condition of the electronically controlled differential lock; the number of repetitions is set based on the number of times the electronically controlled differential lock has engaged over a 10-year period of vehicle use by the user. The higher the vehicle speed, the greater the impact on the electronically controlled differential lock when it locks. When the vehicle speed falls just below the locking speed, the electronically controlled differential lock is actively or passively engaged to test its functionality. If the electronically controlled differential lock is not damaged by the impact of locking, it indicates that it will not be damaged by the impact of locking when the vehicle speed continues to decrease.
[0072] In addition, during the process of adjusting the electronically controlled differential lock to the locking state, the higher the locking speed, the less restrictive the electronically controlled differential lock is to the user, and the better the user experience. When the vehicle speed is just below the locking speed, the electronically controlled differential lock is actively or passively adjusted to the locking state. The electronically controlled differential lock is not damaged by the impact of locking, indicating that the locking speed setting can provide the user with a good driving experience without damaging the electronically controlled differential lock.
[0073] In a specific example, the vehicle enters a road with a kinetic friction coefficient meeting the requirements and comes to a stop. The electronically controlled differential lock to be tested is then adjusted to the unlocked state. The vehicle is accelerated to a speed slightly higher than the locking speed of the electronically controlled differential lock (12 km / h) and kept traveling in a straight line at a constant speed. The vehicle is then decelerated and coasted, during which the tester continuously operates the electronically controlled differential lock switch to lock it until it enters the locked state. The vehicle is then decelerated to 0 km / h and stopped, constituting one verification cycle. This verification cycle is repeated, and the number of repetitions is recorded. Repetition is stopped after reaching the target value of 240 cycles, and the electronically controlled differential lock is checked for proper functioning. A dynamic check of the electronically controlled differential lock is performed, involving disengagement, locking, and disengagement, to determine the smoothness of the entire locking and disengagement process and to identify any abnormal noises or other issues.
[0074] Further, in any of the above embodiments, the locking condition includes the torque being less than a preset locking torque; step 102 further includes:
[0075] Sub-step S21: When the torque of the vehicle is detected to be less than the preset locking torque, determine whether the electronically controlled differential lock is adjusted to the locking state.
[0076] In this embodiment of the invention, the locking condition of the electronically controlled differential lock includes a torque less than the locking torque of the electronically controlled vehicle speed lock. The vehicle's torque corresponds to its acceleration; the greater the vehicle's acceleration, the greater the torque. The greater the vehicle's torque, the greater the impact on the electronically controlled vehicle speed lock when it locks. In a specific example, the locking condition of the vehicle equipped with the electronically controlled differential lock to be verified can typically be preset, and the locking torque can be 60 Nm, 70 Nm, 77 Nm, 80 Nm, etc.
[0077] The verification process for the locking conditions of the electronically controlled differential lock includes the following steps: First, while the vehicle is in motion, the electronically controlled differential lock is in the unlocked state, allowing the vehicle to travel in a straight line with an acceleration greater than the acceleration corresponding to the locking torque. Then, the vehicle's acceleration is reduced, while the tester continuously attempts to lock the electronically controlled differential lock. The goal is for the electronically controlled differential lock to engage when the vehicle's acceleration is just below the acceleration corresponding to the locking torque. This verification process is repeated to verify the locking conditions of the electronically controlled differential lock; the number of repetitions is set based on the number of times the electronically controlled differential lock has engaged over a 10-year period of vehicle use by the user. The greater the vehicle's torque, the greater the impact on the electronically controlled differential lock when it engages. When the vehicle's acceleration is just below the acceleration corresponding to the locking torque, the electronically controlled differential lock is actively or passively engaged to test its functionality. If the electronic speed lock is not damaged by the impact of locking, it means that the electronic speed lock will not be damaged by the impact of locking even when the vehicle's acceleration continues to decrease.
[0078] In addition, during the locking process of the electronically controlled differential lock, the greater the locking torque, the less restrictive the locking of the electronically controlled differential lock is to the user, resulting in a better user experience. When the vehicle's acceleration is just less than the acceleration corresponding to the locking torque, the electronically controlled differential lock is actively or passively locked. The electronically controlled differential lock is not damaged by the impact of locking, indicating that the locking torque setting can provide a good driving experience without damaging the electronically controlled differential lock.
[0079] In a specific example, the vehicle enters a long, straight slope with a kinetic friction coefficient meeting the requirements and a gradient of 20%–60%. The electronically controlled differential lock to be tested is then adjusted to the unlocked state. First, the vehicle is accelerated at full throttle until its acceleration exceeds the acceleration corresponding to the locking torque. Then, the accelerator pedal is gradually released to reduce the vehicle's acceleration, while the tester continuously operates the electronically controlled differential lock switch to lock it until it enters the locked state. The vehicle is then decelerated to 0 km / h and brought to a stop, constituting one verification cycle. This verification process is repeated, and the number of repetitions is recorded. Repetition is stopped after reaching the target value of 120 repetitions, and the electronically controlled differential lock is checked for proper functioning. A dynamic check of the electronically controlled differential lock is performed, involving disengagement, locking, and disengagement, to determine the smoothness of the entire locking and disengagement process and to identify any abnormal noises or other issues.
[0080] Further, in any of the above embodiments, the locking condition includes the speed difference being less than a preset locking speed difference; step 102 further includes:
[0081] Sub-step S31: When the speed difference of the vehicle is detected to be less than the preset locking speed difference, determine whether the electronically controlled differential lock is adjusted to the locking state.
[0082] In this embodiment of the invention, the locking condition of the electronically controlled differential lock includes that the speed difference of the drive wheels is less than the locking speed difference of the electronically controlled differential lock. The speed difference of the vehicle's drive wheels corresponds to the curvature of the vehicle's curved driving path; the greater the curvature of the curved driving path, the greater the speed difference of the vehicle's drive wheels. The greater the speed difference of the vehicle's drive wheels, the greater the impact on the electronically controlled differential lock when it locks. In a specific example, the locking speed difference of the vehicle equipped with the electronically controlled differential lock to be verified can typically be preset, such as 60 rpm, 70 rpm, 77 rpm, 80 rpm, etc., and this invention does not impose any limitations on this.
[0083] The verification process for the locking conditions of the electronically controlled differential lock includes the following steps: First, while the vehicle is in motion, the electronically controlled differential lock is initially in the unlocked state, allowing the vehicle to travel along a curved path with a curvature greater than the curvature corresponding to the locking speed difference. Then, the curvature of the curved path is reduced, while the tester continuously attempts to lock the electronically controlled differential lock. The goal is to lock the electronically controlled differential lock when the curvature of the curved path is just below the curvature corresponding to the locking speed difference. This verification process is repeated to verify the locking conditions of the electronically controlled differential lock; the number of repetitions is set based on the number of times the electronically controlled differential lock has locked over a 10-year period of vehicle use. The greater the speed difference between the vehicle's drive wheels, the greater the impact on the electronically controlled differential lock when it locks. When the curvature of the curved path is just below the curvature corresponding to the locking speed difference, the electronically controlled differential lock is actively or passively locked to check its functionality. If the electronic speed lock is not damaged by the impact of locking, it means that the electronic speed lock will not be damaged by the impact of locking even when the curvature of the vehicle's curved driving path continues to decrease.
[0084] In addition, during the process of adjusting the electronically controlled differential lock to the locked state, the larger the locking speed difference, the less restriction the electronically controlled differential lock imposes on the user, and the better the user experience. When the curvature of the vehicle's curved driving path is just less than the curvature corresponding to the locking speed difference, the electronically controlled differential lock is actively or passively adjusted to the locked state. The electronically controlled differential lock is not damaged by the impact of locking, indicating that the setting of this locking speed difference can provide the user with a good driving experience without damaging the electronically controlled differential lock.
[0085] In a specific example, the vehicle enters and stops at a gravel plaza with a suitable coefficient of dynamic friction, and the electronically controlled differential lock to be tested is adjusted to the unlocked state. First, the vehicle's steering wheel is turned 180°–540° to the left from the center position while driving, and the vehicle is accelerated to a constant speed of 6 km / h. Then, the steering wheel is gradually turned to the right to straighten, and the electronically controlled differential lock switch is continuously operated to lock the electronically controlled differential lock until it is locked. The vehicle is then decelerated to 0 km / h and stopped, which constitutes one verification process. This verification process is repeated, and the number of repetitions is recorded. Repetition is stopped after reaching the target value of 120 repetitions, and the electronically controlled differential lock is checked for proper functioning. A dynamic check of the electronically controlled differential lock is performed, involving disengagement, locking, and disengagement, to determine the smoothness of the entire locking and disengagement process and to identify any abnormal noises or other issues.
[0086] In a specific example, the vehicle enters and stops at a gravel plaza with a suitable coefficient of dynamic friction, and the electronically controlled differential lock to be tested is adjusted to the unlocked state. First, the vehicle's steering wheel is turned 180°–540° to the right from the center position while driving, and the vehicle is accelerated to a constant speed of 6 km / h along a curved path. Then, the steering wheel is gradually turned to the left to straighten, while the tester continuously operates the electronically controlled differential lock switch to lock the differential lock until it is engaged. The vehicle is then decelerated to 0 km / h and stopped, marking one verification cycle. This verification process is repeated, and the number of repetitions is recorded. Repetition is stopped after reaching the target value of 120 repetitions, and the electronically controlled differential lock is checked for proper functioning. A dynamic check of the electronically controlled differential lock is performed, involving disengagement, locking, and disengagement, to determine the smoothness of the entire locking and disengagement process and to identify any abnormal noises or other issues.
[0087] Furthermore, in any of the above embodiments, the vehicle further includes tires; step 101 further includes:
[0088] Sub-step S41: When the vehicle is fully loaded and the tire pressure is within a preset range, the vehicle's operating status is detected.
[0089] In this embodiment of the invention, during the verification of the locking conditions of the electronically controlled differential lock, to ensure that the impact on the electronically controlled differential lock is only related to the locking conditions, the influence of tire pressure on the verification of the locking conditions of the electronically controlled differential lock is eliminated, and the tire pressure is kept within a preset tire pressure range. When the vehicle is fully loaded and the tire pressure is within the preset tire pressure range, the vehicle's operating status is detected, and it is determined whether the locking conditions of the electronically controlled differential lock are met. The tire pressure range can be 220 kPa-240 kPa, 240 kPa-260 kPa, or 270 kPa-290 kPa.
[0090] Furthermore, in any of the above embodiments, step 101 further includes:
[0091] Sub-step S51: When the vehicle is fully loaded and the dynamic friction coefficient of the road surface is within a preset dynamic friction coefficient range, the operating status of the vehicle is detected.
[0092] In this embodiment of the invention, during the verification of the locking conditions of the electronically controlled differential lock, to ensure that the impact on the electronically controlled differential lock is only related to the locking conditions, the influence of the dynamic friction coefficient of the vehicle's road surface on the verification of the locking conditions is eliminated, ensuring that the dynamic friction coefficient of the vehicle's road surface is within a preset dynamic friction coefficient range. When the vehicle is fully loaded and the dynamic friction coefficient of the vehicle's road surface is within the preset dynamic friction coefficient range, the vehicle's operating state is detected, and it is determined whether it meets the locking conditions of the electronically controlled differential lock. In a specific example, the dynamic friction coefficient range is 0.4 to 0.6, and the vehicle's road surface can be a gravel road, a loose concrete road, or a surface with a dynamic friction coefficient of 0.4 to 0.6.
[0093] Furthermore, in any of the above embodiments, the method further includes:
[0094] Sub-step S61: During the state adjustment process of the electronically controlled differential lock, detect whether there are any abnormalities in the locking and unlocking of the electronically controlled differential lock.
[0095] In this embodiment of the invention, during vehicle operation, if the vehicle's operating state matches the locking conditions, it is detected whether the electronically controlled differential lock has been adjusted to the locked state. After the vehicle has finished driving, a dynamic check of the electronically controlled differential lock system should be performed, checking whether the entire locking and unlocking process is smooth and whether there are any abnormal noises or other problems.
[0096] In addition, for friction differential locks, the wear of the friction plates should be checked for abnormalities, and whether there are cracks in the friction plate skeleton. For jaw differential locks, the tooth tips and cusps of the jaw teeth should be carefully inspected to determine whether there are deformations, cracks, or other defects.
[0097] See Figure 2 The diagram illustrates a flowchart of another method for verifying the locking conditions of an electronically controlled differential lock according to an embodiment of the present invention, specifically including the following steps:
[0098] Step 201: Check whether the power and transmission system components installed on the vehicle meet the latest requirements of the vehicle design parameters, and check whether the control software of the electronic differential lock is the latest version to be verified.
[0099] Step 202: Based on the function definition of the control software of the electronic differential lock, determine the locking conditions of the electronic differential lock to be verified, including locking speed, locking torque and locking speed difference.
[0100] Step 203: During the verification of the locking conditions of the electronically controlled differential lock, the signals of the whole vehicle and the electronically controlled differential lock are collected, including the status signal of the electronically controlled differential lock and the data of the signal channel corresponding to the locking conditions of the electronically controlled differential lock.
[0101] Step 204: During the verification of the locking conditions of the electronically controlled differential lock, check whether the tire pressure is within the preset tire pressure range.
[0102] Step 205: During the verification of the locking conditions of the electronically controlled differential lock, check whether the vehicle is fully loaded.
[0103] Step 206: On a road surface where the coefficient of dynamic friction is within a preset range, detect the vehicle speed. When the detected vehicle speed is less than the preset locking speed, determine whether the electronically controlled differential lock has been adjusted to the locked state.
[0104] Step 207: On a road surface where the coefficient of dynamic friction is within a preset range, detect the speed difference of the vehicle's drive wheels. When the detected speed difference of the vehicle's drive wheels is less than a preset locking speed difference, determine whether the electronically controlled differential lock has been adjusted to the locked state.
[0105] Step 208: On a road surface where the coefficient of dynamic friction is within a preset range, detect the vehicle's torque. When the detected vehicle torque is less than the preset locking torque, determine whether the electronically controlled differential lock has been adjusted to the locked state.
[0106] Step 209: In the state adjustment of the electronically controlled differential lock, check whether the electronically controlled differential lock is normal.
[0107] A dynamic check should be performed on the electronically controlled differential lock system to determine whether the entire locking and unlocking process is smooth and whether there are any abnormal noises or other problems.
[0108] Step 210: Determine if the appearance of the electronically controlled differential lock is abnormal.
[0109] During vehicle operation, if the vehicle's operating status matches the locking conditions, the electronically controlled differential lock will actively or passively adjust to the locking state. After the vehicle has finished driving, for friction-type differential locks, check for abnormal wear of the friction plates and whether there are cracks in the friction plate frame; for dog-type differential locks, carefully inspect the tooth tips and cusps of the dog teeth to determine whether there are deformations, cracks, or other defects.
[0110] It should be noted that, for the sake of simplicity, the method embodiments are all described as a series of actions. However, those skilled in the art should understand that the embodiments of the present invention are not limited to the described order of actions, because according to the embodiments of the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions involved are not necessarily essential to the embodiments of the present invention.
[0111] Reference Figure 3 This diagram illustrates a structural block diagram of a device for verifying the locking condition of an electronically controlled differential lock, provided in an embodiment of the present invention. The device is applied to a vehicle, which includes at least two drive wheels and an electronically controlled differential lock that controls the drive wheels. The locking condition of the electronically controlled differential lock is associated with at least one of the vehicle's speed, the vehicle's torque, and the speed difference between the drive wheels. Specifically, it may include the following modules:
[0112] The vehicle operating status detection module 301 is used to detect the operating status of the vehicle when the vehicle is fully loaded; wherein the operating status of the vehicle includes at least one of the vehicle speed, the vehicle torque, and the difference in rotational speed of the drive wheels.
[0113] The determining module 302 is used to determine whether the electronically controlled differential lock is adjusted to the locked state when the operating state of the vehicle is detected to meet the locking condition.
[0114] The electronically controlled differential lock detection module 303 is used to detect whether the electronically controlled differential lock is normal when the electronically controlled differential lock is adjusted to the locked state.
[0115] In an optional embodiment of the present invention, the locking condition includes the vehicle speed being less than a preset locking speed; the determining module further includes:
[0116] The first determining submodule is used to determine whether the electronically controlled differential lock is adjusted to the locked state when the speed of the vehicle is detected to be less than the preset locking speed.
[0117] In an optional embodiment of the present invention, the locking condition includes the torque being less than a preset locking torque; the determining module further includes:
[0118] The second determining submodule is used to determine whether the electronically controlled differential lock is adjusted to the locked state when the torque of the vehicle is detected to be less than the preset locking torque.
[0119] In an optional embodiment of the present invention, the locking condition includes the speed difference being less than a preset locking speed difference; the determining module further includes:
[0120] The third determining submodule is used to determine whether the electronically controlled differential lock is adjusted to the locked state when the speed difference of the vehicle is detected to be less than the preset locking speed difference.
[0121] In an optional embodiment of the present invention, the vehicle further includes tires; the vehicle operating status detection module further includes:
[0122] The first vehicle operation status detection submodule is used to detect the vehicle's operation status when the vehicle is fully loaded and the tire pressure is within a preset tire pressure range.
[0123] In an optional embodiment of the present invention, the vehicle operating status detection module further includes:
[0124] The second vehicle operation status detection submodule is used to detect the vehicle's operation status when the vehicle is fully loaded and the dynamic friction coefficient of the road surface is within a preset dynamic friction coefficient range.
[0125] In an optional embodiment of the present invention, the device further includes:
[0126] The abnormal situation detection module is used to detect whether there are any abnormal situations in the locking and unlocking of the electronically controlled differential lock during the state adjustment process.
[0127] As the device embodiment is basically similar to the method embodiment, the description is relatively simple, and relevant parts can be found in the description of the method embodiment.
[0128] In addition, embodiments of the present invention also provide an electronic device, such as... Figure 4 As shown, it includes a processor 401, a communication interface 402, a memory 403, and a communication bus 404, wherein the processor 401, the communication interface 402, and the memory 403 communicate with each other through the communication bus 404.
[0129] Memory 403 is used to store computer programs;
[0130] When processor 401 executes the program stored in memory 403, it performs the following steps:
[0131] When the vehicle is fully loaded, the vehicle's operating status is detected; wherein, the vehicle's operating status includes at least one of the vehicle's speed, the vehicle's torque, and the difference in rotational speed between the drive wheels;
[0132] When the vehicle's operating state is detected to meet the locking condition, it is determined whether the electronically controlled differential lock is adjusted to the locked state.
[0133] When the electronically controlled differential lock is adjusted to the locked state, check whether the electronically controlled differential lock is functioning properly.
[0134] In an optional embodiment of the present invention, the locking condition includes the vehicle speed being less than a preset locking speed; the step of determining whether the electronically controlled differential lock is adjusted to a locked state when the vehicle's operating state is detected to meet the locking condition further includes:
[0135] When the speed of the vehicle is detected to be less than the preset locking speed, it is determined whether the electronically controlled differential lock is adjusted to the locked state.
[0136] In an optional embodiment of the present invention, the locking condition includes the torque being less than a preset locking torque; the step of determining whether the electronically controlled differential lock is adjusted to a locked state when the vehicle's operating state is detected to meet the locking condition further includes:
[0137] When the torque of the vehicle is detected to be less than the preset locking torque, it is determined whether the electronically controlled differential lock is adjusted to the locked state.
[0138] In an optional embodiment of the present invention, the locking condition includes the speed difference being less than a preset locking speed difference; the step of determining whether the electronically controlled differential lock is adjusted to a locked state when the vehicle's operating state is detected to meet the locking condition further includes:
[0139] When the speed difference of the vehicle is detected to be less than the preset locking speed difference, it is determined whether the electronically controlled differential lock is adjusted to the locking state.
[0140] In an optional embodiment of the present invention, the vehicle further includes tires; and the step of detecting the operating status of the vehicle when the vehicle is fully loaded further includes:
[0141] The vehicle's operating status is detected when the vehicle is fully loaded and the tire pressure is within a preset range.
[0142] In an optional embodiment of the present invention, detecting the operating status of the vehicle when the vehicle is fully loaded further includes:
[0143] The vehicle's operating status is detected when the vehicle is fully loaded and the coefficient of dynamic friction of the road surface on which the vehicle travels is within a preset range.
[0144] In an optional embodiment of the present invention, the method further includes:
[0145] During the state adjustment process of the electronically controlled differential lock, it is detected whether there are any abnormalities in the locking and unlocking of the electronically controlled differential lock.
[0146] The communication bus mentioned above can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. This communication bus can be divided into address bus, data bus, control bus, etc. For ease of illustration, only one thick line is used to represent it in the diagram, but this does not mean that there is only one bus or one type of bus.
[0147] The communication interface is used for communication between the aforementioned terminal and other devices.
[0148] The memory may include random access memory (RAM) or non-volatile memory, such as at least one disk storage device. Optionally, the memory may also be at least one storage device located remotely from the aforementioned processor.
[0149] The processors mentioned above can be general-purpose processors, including central processing units (CPUs), network processors (NPs), etc.; they can also be digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.
[0150] like Figure 5 As shown, in another embodiment of the present invention, a computer-readable storage medium 501 is also provided, which stores instructions that, when executed on a computer, cause the computer to perform a method for verifying the locking conditions of an electronically controlled differential lock as described in the above embodiment.
[0151] In another embodiment of the present invention, a computer program product containing instructions is also provided, which, when run on a computer, causes the computer to execute a method for verifying the locking conditions of an electronically controlled differential lock as described in the above embodiments.
[0152] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present invention are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid state disk (SSD)).
[0153] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0154] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.
[0155] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.
Claims
1. A method for verifying the locking conditions of an electronically controlled differential lock, characterized in that, Applied to a vehicle, the vehicle including at least two drive wheels and an electronically controlled differential lock for controlling the drive wheels, the locking condition of the electronically controlled differential lock being associated with at least one of the vehicle's speed, the vehicle's torque, and the speed difference of the drive wheels; the method includes: When the vehicle is fully loaded, the vehicle's operating status is detected; wherein, the vehicle's operating status includes at least one of the vehicle's speed, the vehicle's torque, and the difference in rotational speed between the drive wheels; When the vehicle's operating state is detected to meet the locking condition, it is determined whether the electronically controlled differential lock is adjusted to the locked state. With the electronically controlled differential lock adjusted to the locked state, check whether the electronically controlled differential lock is functioning properly; If the electronically controlled differential lock operates normally, the stringency of the locking conditions is appropriate.
2. The method according to claim 1, characterized in that, The locking condition includes the vehicle speed being less than a preset locking speed; the step of determining whether the electronically controlled differential lock is adjusted to the locked state when the vehicle's operating state is detected to meet the locking condition further includes: When the speed of the vehicle is detected to be less than the preset locking speed, it is determined whether the electronically controlled differential lock is adjusted to the locked state.
3. The method according to claim 1, characterized in that, The locking condition includes the torque being less than a preset locking torque; the step of determining whether the electronically controlled differential lock is adjusted to the locked state when the vehicle's operating state is detected to meet the locking condition further includes: When the torque of the vehicle is detected to be less than the preset locking torque, it is determined whether the electronically controlled differential lock is adjusted to the locked state.
4. The method according to claim 1, characterized in that, The locking condition includes the speed difference being less than a preset locking speed difference; the step of determining whether the electronically controlled differential lock is adjusted to the locked state when the vehicle's operating state is detected to meet the locking condition further includes: When the speed difference of the vehicle is detected to be less than the preset locking speed difference, it is determined whether the electronically controlled differential lock is adjusted to the locking state.
5. The method according to any one of claims 1-4, characterized in that, The vehicle also includes tires; the step of detecting the vehicle's operating status when the vehicle is fully loaded further includes: The vehicle's operating status is detected when the vehicle is fully loaded and the tire pressure is within a preset range.
6. The method according to any one of claims 1-4, characterized in that, The step of detecting the vehicle's operating status when the vehicle is fully loaded also includes: The vehicle's operating status is detected when the vehicle is fully loaded and the coefficient of dynamic friction of the road surface on which the vehicle travels is within a preset range.
7. The method according to any one of claims 1-4, characterized in that, The method further includes: During the state adjustment process of the electronically controlled differential lock, it is detected whether there are any abnormalities in the locking and unlocking of the electronically controlled differential lock.
8. A device for verifying the locking conditions of an electronically controlled differential lock, characterized in that, Applied to a vehicle, the vehicle including at least two drive wheels and an electronically controlled differential lock for controlling the drive wheels, the locking condition of the electronically controlled differential lock being associated with at least one of the vehicle's speed, the vehicle's torque, and the speed difference of the drive wheels; the device includes: A vehicle operating status detection module is used to detect the operating status of the vehicle when the vehicle is fully loaded; wherein the operating status of the vehicle includes at least one of the vehicle speed, the vehicle torque, and the difference in rotational speed of the drive wheels. The determining module is used to determine whether the electronically controlled differential lock is adjusted to the locked state when the operating state of the vehicle is detected to meet the locking condition. The electronically controlled differential lock detection module is used to detect whether the electronically controlled differential lock is functioning properly when the electronically controlled differential lock is adjusted to the locked state. If the electronically controlled differential lock operates normally, the stringency of the locking conditions is appropriate.
9. An electronic device, characterized in that, It includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; The memory is used to store computer programs; When the processor executes a program stored in the memory, it implements the method as described in any one of claims 1-7.
10. A computer-readable medium having instructions stored thereon that, when executed by one or more processors, cause the processors to perform the method as described in any one of claims 1-7.