Method, device, equipment and medium for determining filling rate state of hydraulic retarder

Abstract

The embodiment of the present invention discloses a method, device, equipment and medium for determining the filling rate state of a hydraulic retarder. The method comprises: when it is detected that the hydraulic retarder of a target vehicle is in a working state, determining the current vehicle information of the target vehicle; determining the target braking torque of the hydraulic retarder according to the current vehicle information, the target braking torque including the current braking torque and the rated braking torque; determining the braking torque deviation rate of the hydraulic retarder according to the target braking torque; and determining the current filling rate state of the hydraulic retarder according to the braking torque deviation rate. This technical solution can accurately identify the filling rate of the hydraulic retarder during the actual driving process of the vehicle, has strong practicality, and can better meet the actual vehicle detection needs.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle detection, and in particular to a method, device, equipment and medium for determining a filling rate state of a hydraulic retarder. Background Art

[0002] A hydraulic retarder uses the damping effect of fluid flow to generate a reverse braking force opposite to the forward driving force, slowing the vehicle and providing auxiliary braking. During the retarder's braking process, the fluid filling rate within the retarder's working chamber significantly impacts its braking performance and safety. Therefore, accurately identifying the fluid filling rate within the retarder's working chamber is crucial for vehicle performance.

[0003] Related technologies use data simulation to determine the filling rate of the hydraulic retarder's working chamber. However, this approach is not suitable for vehicles in actual operation. It cannot identify the filling rate of the hydraulic retarder's working chamber during actual driving, resulting in poor practicality and difficulty meeting actual vehicle testing needs. Summary of the Invention

[0004] The present invention provides a method, device, equipment and medium for determining the filling rate state of a hydraulic retarder, which can accurately identify the filling rate of the hydraulic retarder during actual vehicle driving. It is highly practical and can better meet actual vehicle detection needs.

[0005] According to one aspect of the present invention, a method for determining a filling rate state of a hydraulic retarder is provided, the method comprising:

[0006] When it is detected that the hydraulic retarder of the target vehicle is in an operating state, determining current vehicle information of the target vehicle;

[0007] determining a target braking torque of the hydraulic retarder according to the current vehicle information, wherein the target braking torque includes a current braking torque and a rated braking torque;

[0008] determining a braking torque deviation rate of the hydraulic retarder according to the target braking torque;

[0009] A current filling rate state of the hydraulic retarder is determined according to the braking torque deviation rate.

[0010] According to another aspect of the present invention, a device for determining a filling rate state of a hydraulic retarder is provided, comprising:

[0011] a current vehicle information determining module, configured to determine the current vehicle information of the target vehicle when detecting that the hydraulic retarder of the target vehicle is in an operating state;

[0012] a target braking torque determination module, configured to determine a target braking torque of the hydraulic retarder according to the current vehicle information, wherein the target braking torque includes a current braking torque and a rated braking torque;

[0013] a braking torque deviation rate determining module, configured to determine a braking torque deviation rate of the hydraulic retarder according to the target braking torque;

[0014] The current filling rate state determining module is used to determine the current filling rate state of the hydraulic retarder according to the braking torque deviation rate.

[0015] According to another aspect of the present invention, an electronic device is provided, comprising:

[0016] at least one processor; and

[0017] a memory communicatively connected to the at least one processor; wherein,

[0018] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the method for determining the filling rate state of the hydraulic retarder according to any embodiment of the present invention.

[0019] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the method for determining the filling rate state of a hydraulic retarder according to any embodiment of the present invention when executed.

[0020] The technical solution of an embodiment of the present invention determines the current vehicle information of the target vehicle when it is detected that the hydraulic retarder of the target vehicle is in an operating state; determines the target braking torque of the hydraulic retarder based on the current vehicle information, the target braking torque including the current braking torque and the rated braking torque; determines the braking torque deviation rate of the hydraulic retarder based on the target braking torque; and determines the current fluid filling rate of the hydraulic retarder based on the braking torque deviation rate. This technical solution can accurately identify the fluid filling rate of the hydraulic retarder during actual vehicle driving, is highly practical, and can well meet actual vehicle detection needs.

[0021] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 This is a flow chart of a method for determining a filling rate state of a hydraulic retarder provided in accordance with a first embodiment of the present invention;

[0024] Figure 2 This is a flow chart of a method for determining a filling rate state of a hydraulic retarder provided in accordance with a second embodiment of the present invention;

[0025] Figure 3 2 is a schematic structural diagram of a device for determining a filling rate state of a hydraulic retarder according to a third embodiment of the present invention;

[0026] Figure 4 The present invention is a schematic structural diagram of an electronic device for implementing a method for determining a filling rate state of a hydraulic retarder according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0028] It should be noted that the terms "first", "second", "target", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0029] Example 1

[0030] Figure 1This is a flow chart of a method for determining the filling rate state of a hydraulic retarder provided in the first embodiment of the present invention. This embodiment is applicable to the situation where the filling rate state of a hydraulic retarder is accurately identified during the actual driving process of a vehicle. The method can be executed by a device for determining the filling rate state of a hydraulic retarder. The device for determining the filling rate state of a hydraulic retarder can be implemented in the form of hardware and / or software. The device for determining the filling rate state of a hydraulic retarder can be configured in an electronic device with data processing capabilities. Figure 1 As shown, the method includes:

[0031] S110 , when it is detected that the hydraulic retarder of the target vehicle is in an operating state, current vehicle information of the target vehicle is determined.

[0032] The technical solution of this embodiment is suitable for accurately identifying the filling rate status within the working chamber of a hydraulic retarder during actual vehicle driving. The working chamber of a hydraulic retarder consists of a stator and a rotor. When the vehicle driver or the vehicle control unit detects that the vehicle needs to slow down based on road conditions, the retarder control unit issues a command to pressurize the retarder working medium from the oil reservoir into the retarder working chamber. The rotation of the retarder rotor drives the liquid in the working chamber into high-speed rotation, and the accelerated liquid impacts the fixed retarder stator. After the high-speed liquid impacts the stator, it rebounds onto the retarder rotor blades, generating a counter-braking force opposite to the driving force. The liquid in the working chamber heats up due to the rotor's agitation. The hot liquid flows through the oil return channel into the retarder's heat exchanger, where it cools down and continues to participate in a new round of filling, oil stirring, braking, and circulating cooling processes. The braking force generated by the hydraulic retarder acts on the wheels through the meshing gears, transmission shaft, and drive axle, reducing the vehicle's speed.

[0033] The current vehicle information may refer to relevant information about the target vehicle at the current moment, including vehicle information and retarder information. Specifically, the current vehicle information may include vehicle speed, vehicle weight, vehicle shaft speed, wheel radius, vehicle moment of inertia, drive axle ratio, retarder control pressure, road slope, frontal area, and braking deceleration.

[0034] In this embodiment, during vehicle travel, the target vehicle's hydraulic retarder is detected in real time to determine whether it is in an active state. Optionally, the hydraulic retarder's active state includes all modes requiring retarder braking, such as the hydraulic retarder being in a constant speed gear mode, the hydraulic retarder being in a fixed gear mode, the vehicle being in a cruise control mode, the vehicle being in an adaptive cruise mode, the vehicle being in a variable speed adjustment mode, and the vehicle being in an automatic driving mode. When the target vehicle's hydraulic retarder is detected to be in an active state, current vehicle information of the target vehicle is first determined.

[0035] S120 , determining a target braking torque of the hydraulic retarder according to current vehicle information, where the target braking torque includes a current braking torque and a rated braking torque.

[0036] The current braking torque may refer to the braking torque of the hydraulic retarder at the current moment. The rated braking torque may refer to a pre-calibrated reference braking torque of the hydraulic retarder. In this embodiment, after determining the current vehicle information of the target vehicle, the current braking torque and the rated braking torque of the hydraulic retarder may be determined based on the current vehicle information.

[0037] In this embodiment, optionally, determining the target braking torque of the hydraulic retarder according to the current vehicle information includes: determining the current braking torque of the hydraulic retarder by a preset formula, the expression of the preset formula is: T1=(Mg sinα-K0·S·V 2 -μMg cosα-δ·dv / dt)·r0 / i0; where T1 is the current braking torque, M is the vehicle mass, g is the acceleration due to gravity, α is the slope of the road on which the vehicle is located, K0 is the vehicle drag coefficient, S is the vehicle's frontal area, Y is the vehicle speed, μ is the vehicle-road resistance coefficient, δ is the vehicle's rotational mass conversion coefficient, r0 is the wheel radius, i0 is the drive axle speed ratio, and dv / dt is the vehicle's braking deceleration.

[0038] In this embodiment, optionally, determining the target braking torque of the hydraulic retarder based on current vehicle information includes: determining the rated braking torque of the hydraulic retarder based on a pre-calibrated hydraulic retarder characteristic curve; wherein the hydraulic retarder characteristic curve is used to describe the mapping relationship between the hydraulic retarder operating state, the hydraulic retarder control air pressure, the vehicle shaft speed, and the rated braking torque of the hydraulic retarder.

[0039] In this embodiment, the rated braking torque of hydraulic retarders from different manufacturers and models is pre-calibrated on a test bench under different operating conditions to obtain hydraulic retarder characteristic curves under different operating conditions. The hydraulic retarder characteristic curve describes the mapping relationship between the hydraulic retarder operating state, hydraulic retarder control air pressure, vehicle shaft speed, and the hydraulic retarder rated braking torque. The specific calibration process is to measure the rated braking torque of the hydraulic retarder under different operating conditions, different control air pressures, and different vehicle shaft speeds on the test bench, and then plot the hydraulic retarder operating state, hydraulic retarder control air pressure, vehicle shaft speed, and hydraulic retarder rated braking torque as a set of parameters in a spatial coordinate system. Then, interpolation is performed based on the existing coordinate points to obtain the final hydraulic retarder characteristic curve.

[0040] To determine the rated braking torque of a hydraulic retarder, it is first necessary to determine the hydraulic retarder's operating state, hydraulic retarder control air pressure, and vehicle shaft speed. Then, based on these parameters, the hydraulic retarder characteristic curve is queried to determine the rated braking torque of the hydraulic retarder corresponding to these parameters. The hydraulic retarder operating state, hydraulic retarder control air pressure, and vehicle shaft speed can be considered input parameters of the hydraulic retarder characteristic curve, while the rated braking torque of the hydraulic retarder can be considered the output parameter of the hydraulic retarder characteristic curve.

[0041] S130: Determine a braking torque deviation rate of the hydraulic retarder according to the target braking torque.

[0042] The braking torque deviation rate can be used to characterize the deviation between the current braking torque and the rated braking torque. It can be understood that a larger braking torque deviation rate indicates a larger deviation between the current braking torque and the rated braking torque, while a smaller braking torque deviation rate indicates a smaller deviation between the current braking torque and the rated braking torque.

[0043] In this embodiment, after determining the target braking torque of the hydraulic retarder, a braking torque deviation rate of the hydraulic retarder can be determined based on the target braking torque. Optionally, determining the braking torque deviation rate of the hydraulic retarder based on the target braking torque includes: determining the braking torque deviation of the hydraulic retarder based on the difference between the current braking torque and the rated braking torque; and determining the braking torque deviation rate of the hydraulic retarder based on the ratio of the braking torque deviation to the rated braking torque.

[0044] Among them, the braking torque deviation can refer to the difference between the current braking torque and the rated braking torque. It should be noted that the braking torque deviation can be a positive number (i.e., the current braking torque is greater than the rated braking torque), a negative number (i.e., the current braking torque is less than the rated braking torque), or 0 (i.e., the current braking torque is equal to the rated braking torque). The calculation formula of the braking torque deviation rate can be expressed as braking torque deviation rate = (current braking torque - rated braking torque) / rated braking torque. Since the braking torque deviation can be a positive number, a negative number or 0, accordingly, the braking torque deviation rate can also be a positive number, a negative number or 0.

[0045] S140: Determine the current filling rate state of the hydraulic retarder according to the braking torque deviation rate.

[0046] In this embodiment, after determining the braking torque deviation rate of the hydraulic retarder, the current filling rate state of the hydraulic retarder can be determined based on the braking torque deviation rate. Optionally, determining the current filling rate state of the hydraulic retarder based on the braking torque deviation rate includes: if the braking torque deviation rate is equal to a preset deviation rate threshold, determining the current filling rate state of the hydraulic retarder is that the current filling rate is equal to the calibrated filling rate; if the braking torque deviation rate is less than the preset deviation rate threshold, determining the current filling rate state of the hydraulic retarder is that the current filling rate is less than the calibrated filling rate; if the braking torque deviation rate is greater than the preset deviation rate threshold, determining the current filling rate state of the hydraulic retarder is that the current filling rate is greater than the calibrated filling rate; wherein the preset deviation rate threshold is 0, the calibrated filling rate refers to the hydraulic retarder filling rate corresponding to the pre-calibrated current braking torque of the hydraulic retarder being equal to the rated braking torque, and the degree of difference between the braking torque deviation rate and the preset deviation rate threshold is positively correlated with the degree of difference between the current filling rate of the hydraulic retarder and the calibrated filling rate.

[0047] In the present embodiment, the hydraulic retarder filling rate corresponding to the current braking torque of the hydraulic retarder is pre-calibrated as the calibrated filling rate, and then the current filling rate state of the hydraulic retarder is determined based on the magnitude relationship between the braking torque deviation rate and the preset deviation rate threshold value. Wherein, the preset deviation rate threshold value is 0. Specifically, if the braking torque deviation rate is equal to 0, it shows that the current braking torque is equal to the rated braking torque (no deviation), and now it can be determined that the current filling rate state of the hydraulic retarder is that the current filling rate is equal to the calibrated filling rate; if the braking torque deviation rate is less than 0, it shows that the current braking torque is less than the rated braking torque, and now it can be determined that the current filling rate state of the hydraulic retarder is that the current filling rate is lower than the calibrated filling rate; if the braking torque deviation rate is greater than 0, it shows that the current braking torque is greater than the rated braking torque, and now it can be determined that the current filling rate state of the hydraulic retarder is that the current filling rate is higher than the calibrated filling rate. It should be noted that the degree of difference between the braking torque deviation rate and the preset deviation rate threshold is positively correlated with the degree of difference between the hydraulic retarder's current filling rate and the calibrated filling rate. In other words, the greater the difference between the braking torque deviation rate and the preset deviation rate threshold, the greater the difference between the hydraulic retarder's current filling rate and the calibrated filling rate.

[0048] Furthermore, in order to better represent the degree of difference between the current filling rate of the hydraulic retarder and the calibrated filling rate, different braking torque deviation rate intervals can be pre-delineated, and the braking torque deviation rate can be graded according to the braking torque deviation rate intervals. For example, the braking torque deviation rate intervals can be divided into a first negative interval, a second negative interval, a third negative interval, a first positive interval, a second negative interval, and a third negative interval. Among them, the negative interval value is a negative number, indicating that the braking torque deviation rate is less than the preset deviation rate threshold, and the absolute value of each negative interval is in the order of the third negative interval > the second negative interval > the first negative interval; the positive interval value is a positive number, indicating that the braking torque deviation rate is greater than the preset deviation rate threshold, and the absolute value of each positive interval is in the order of the third positive interval > the second positive interval > the first positive interval. Among them, this embodiment does not specifically limit the division of the braking torque deviation rate intervals, and can be set according to actual application requirements.

[0049] Specifically, when the braking torque deviation rate is in the third negative interval, the hydraulic retarder filling rate is at the sixth level; when the braking torque deviation rate is in the second negative interval, the hydraulic retarder filling rate is at the fifth level; when the braking torque deviation rate is in the first negative interval, the hydraulic retarder filling rate is at the fourth level; when the braking torque deviation rate is in the first positive interval, the hydraulic retarder filling rate is at the third level; when the braking torque deviation rate is in the second positive interval, the hydraulic retarder filling rate is at the second level; and when the braking torque deviation rate is in the third positive interval, the hydraulic retarder filling rate is at the first level. The braking torque deviation rate corresponding to the sixth level is negative and the smallest, while the braking torque deviation rate corresponding to the first level is positive and the largest.

[0050] After determining the current filling rate of the hydraulic retarder, the current filling rate status can be transmitted via a signal to the target vehicle's instrument panel for visual display. Through human-machine interaction with the driver, the driver can be reminded of the hydraulic retarder's current operating status and current filling rate status. Furthermore, if it is detected that the hydraulic retarder's filling rate remains continuously at the first or sixth level, an alarm command is requested, causing a flashing light on the instrument panel to indicate that the hydraulic retarder is currently experiencing an abnormal fault and requires prompt repair by the driver. A continuous maintenance of the hydraulic retarder's filling rate at the first level indicates that the hydraulic retarder's return oil channel is blocked or that the oil inlet channel is abnormally unobstructed; a continuous maintenance of the hydraulic retarder's filling rate at the sixth level indicates that the hydraulic retarder's oil inlet channel is blocked or that the oil return channel is abnormally unobstructed. Based on the determination of the hydraulic retarder's filling rate status, potential faults can be predicted and prompted, helping to improve vehicle operation safety.

[0051] The technical solution of an embodiment of the present invention determines the current vehicle information of the target vehicle when it is detected that the hydraulic retarder of the target vehicle is in an operating state; determines the target braking torque of the hydraulic retarder based on the current vehicle information, the target braking torque including the current braking torque and the rated braking torque; determines the braking torque deviation rate of the hydraulic retarder based on the target braking torque; and determines the current fluid filling rate of the hydraulic retarder based on the braking torque deviation rate. This technical solution can accurately identify the fluid filling rate of the hydraulic retarder during actual vehicle driving, is highly practical, and can well meet actual vehicle detection needs.

[0052] Example 2

[0053] Figure 2 This is a flow chart of a method for determining the filling rate state of a hydraulic retarder, provided in Example 2 of the present invention. This example is optimized based on the above-mentioned example. Specifically, the optimization is as follows: before determining the target braking torque of the hydraulic retarder based on current vehicle information, the method further includes: synchronizing the current vehicle information; accordingly, determining the target braking torque of the hydraulic retarder based on the current vehicle information includes: determining the target braking torque of the hydraulic retarder based on the current vehicle information after data synchronization.

[0054] like Figure 2 As shown, the method of this embodiment specifically includes the following steps:

[0055] S210 , when it is detected that the hydraulic retarder of the target vehicle is in an operating state, current vehicle information of the target vehicle is determined.

[0056] S220 , performing data synchronization on the current vehicle information, and determining a target braking torque of the hydraulic retarder based on the synchronized current vehicle information.

[0057] It should be noted that in this embodiment, when determining the current vehicle information of the target vehicle, the frequency of collecting information for different vehicles may vary, thereby affecting the accuracy of determining the hydraulic retarder filling rate status. To avoid inaccurate determination of the hydraulic retarder filling rate status due to different information collection frequencies, after determining the current vehicle information of the target vehicle, data synchronization can be performed on the current vehicle information to ensure that the information for each vehicle is the same as that of the previous vehicle.

[0058] S230: Determine a braking torque deviation rate of the hydraulic retarder according to the target braking torque.

[0059] S240: Determine the current filling rate state of the hydraulic retarder according to the braking torque deviation rate.

[0060] The technical solution of an embodiment of the present invention synchronizes the current vehicle information before determining the target braking torque of the hydraulic retarder based on the current vehicle information; the target braking torque of the hydraulic retarder is then determined based on the synchronized current vehicle information. This technical solution effectively avoids the problem of inaccurate judgment of the hydraulic retarder filling rate status caused by different information collection frequencies through data synchronization, helps to improve the accuracy of identifying the hydraulic retarder filling rate during actual vehicle driving, is highly practical, and can better meet the actual vehicle detection needs.

[0061] Example 3

[0062] Figure 3 This is a schematic diagram of the structure of a device for determining the filling rate state of a hydraulic retarder provided in the third embodiment of the present invention. The device can execute the method for determining the filling rate state of a hydraulic retarder provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method. Figure 3 As shown, the device includes:

[0063] The current vehicle information determining module 310 is configured to determine the current vehicle information of the target vehicle when it is detected that the hydraulic retarder of the target vehicle is in an operating state;

[0064] a target braking torque determination module 320, configured to determine a target braking torque of the hydraulic retarder according to the current vehicle information, wherein the target braking torque includes a current braking torque and a rated braking torque;

[0065] a braking torque deviation rate determining module 330, configured to determine a braking torque deviation rate of the hydraulic retarder according to the target braking torque;

[0066] The current filling rate state determining module 340 is configured to determine the current filling rate state of the hydraulic retarder according to the braking torque deviation rate.

[0067] Optionally, the working states of the hydraulic retarder include the hydraulic retarder being in constant speed gear mode, the hydraulic retarder being in fixed gear mode, the whole vehicle being in cruise mode, the whole vehicle being in adaptive cruise mode, the whole vehicle being in variable speed adjustment mode and the whole vehicle being in automatic driving mode.

[0068] Optionally, the target braking torque determination module 320 is configured to:

[0069] The current braking torque of the hydraulic retarder is determined by a preset formula, and the expression of the preset formula is:

[0070]

[0071] Among them, T1 is the current braking torque, M is the vehicle mass, g is the acceleration of gravity, α is the slope of the road on which the vehicle is located, K0 is the vehicle drag coefficient, S is the vehicle's frontal area, V is the vehicle speed, μ is the vehicle and road resistance coefficient, δ is the vehicle's rotational mass conversion coefficient, r0 is the wheel radius, i0 is the drive axle speed ratio, and dv / dt is the vehicle's braking deceleration.

[0072] Optionally, the target braking torque determination module 320 is further configured to:

[0073] determining a rated braking torque of the hydraulic retarder based on a pre-calibrated hydraulic retarder characteristic curve;

[0074] The hydraulic retarder characteristic curve is used to describe the mapping relationship between the hydraulic retarder working state, the hydraulic retarder control air pressure, the vehicle shaft speed and the hydraulic retarder rated braking torque.

[0075] Optionally, the braking torque deviation rate determination module 330 is configured to:

[0076] determining a braking torque deviation of the hydraulic retarder according to a difference between the current braking torque and the rated braking torque;

[0077] A braking torque deviation rate of the hydraulic retarder is determined according to a ratio of the braking torque deviation to the rated braking torque.

[0078] Optionally, the current filling rate state determining module 340 is configured to:

[0079] If the braking torque deviation rate is equal to a preset deviation rate threshold, determining that the current filling rate state of the working chamber of the hydraulic retarder is equal to the calibrated filling rate;

[0080] If the braking torque deviation rate is less than the preset deviation rate threshold, determining that the current filling rate state of the working chamber of the hydraulic retarder is lower than the calibrated filling rate;

[0081] If the braking torque deviation rate is greater than the preset deviation rate threshold, determining that the current filling rate state of the working chamber of the hydraulic retarder is higher than the calibrated filling rate;

[0082] The preset deviation rate threshold is 0, the calibrated filling rate refers to the pre-calibrated filling rate of the hydraulic retarder corresponding to the current braking torque of the hydraulic retarder being equal to the rated braking torque, and the degree of difference between the braking torque deviation rate and the preset deviation rate threshold is positively correlated with the degree of difference between the current filling rate of the hydraulic retarder and the calibrated filling rate.

[0083] Optionally, the device further includes:

[0084] a data synchronization module, configured to synchronize data on the current vehicle information before determining the target braking torque of the hydraulic retarder based on the current vehicle information;

[0085] Accordingly, the target braking torque determination module 320 is configured to:

[0086] The target braking torque of the hydraulic retarder is determined according to the current vehicle information after data synchronization.

[0087] An apparatus for determining a filling rate state of a hydraulic retarder provided in an embodiment of the present invention can execute a method for determining a filling rate state of a hydraulic retarder provided in any embodiment of the present invention, and has corresponding functional modules and beneficial effects of the execution method.

[0088] Example 4

[0089] Figure 4 A schematic diagram of the structure of an electronic device 10 that can be used to implement an embodiment of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or claimed herein.

[0090] like Figure 4 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., which is communicatively connected to the at least one processor 11. The memory stores a computer program that can be executed by the at least one processor. The processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 into the random access memory (RAM) 13. Various programs and data required for the operation of the electronic device 10 can also be stored in the RAM 13. The processor 11, ROM 12, and RAM 13 are connected to each other via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0091] Multiple components in the electronic device 10 are connected to the I / O interface 15, including an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a magnetic disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices via a computer network such as the Internet and / or various telecommunication networks.

[0092] The processor 11 can be any general-purpose and / or specialized processing component with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various specialized artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as the method for determining the filling rate state of a hydraulic retarder.

[0093] In some embodiments, the method for determining the filling rate state of a hydraulic retarder can be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed on the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the method for determining the filling rate state of the hydraulic retarder described above can be performed. Alternatively, in other embodiments, the processor 11 can be configured to execute the method for determining the filling rate state of the hydraulic retarder by any other appropriate means (e.g., by means of firmware).

[0094] Various embodiments of the systems and techniques described herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include being implemented in one or more computer programs that are executable and / or interpreted on a programmable system that includes at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0095] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when the computer program is executed by the processor, the functions / operations specified in the flowcharts and / or block diagrams are implemented. The computer program may be executed entirely on the machine, partially on the machine, as a stand-alone software package, partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0096] In the context of the present invention, computer-readable storage media can be tangible media that can contain or store a computer program for use with an instruction execution system, device or equipment or used in combination with an instruction execution system, device or equipment. Computer-readable storage media can include but are not limited to electronic, magnetic, optical, electromagnetic, infrared or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, computer-readable storage media can be machine-readable signal media. More specific examples of machine-readable storage media can include electrical connections based on one or more lines, portable computer disks, hard disks, random access memories (RAM), read-only memories (ROM), erasable programmable read-only memories (EPROM or flash memory), optical fibers, portable compact disk read-only memories (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0097] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0098] The systems and techniques described herein can be implemented in a computing system that includes back-end components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes front-end components (e.g., a user computer with a graphical user interface or web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such back-end components, middleware components, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0099] A computing system may include clients and servers. The clients and servers are typically remote from each other and typically interact via a communication network. This client-server relationship arises through computer programs running on the respective computers, creating a client-server relationship. The server may be a cloud server, also known as a cloud computing server or cloud host. This server is a hosting product within the cloud computing service ecosystem that addresses the management difficulties and limited scalability of traditional physical hosting and VPS services.

[0100] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. This is not limited herein.

[0101] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A method for determining the filling rate state of a hydraulic retarder, characterized in that: The method comprises: When it is detected that the hydraulic retarder of the target vehicle is in an operating state, determining current vehicle information of the target vehicle; determining a target braking torque of the hydraulic retarder according to the current vehicle information, wherein the target braking torque includes a current braking torque and a rated braking torque; determining a braking torque deviation rate of the hydraulic retarder according to the target braking torque; determining a current filling rate state of the hydraulic retarder according to the braking torque deviation rate; Determining the braking torque deviation rate of the hydraulic retarder according to the target braking torque includes: determining a braking torque deviation of the hydraulic retarder according to a difference between the current braking torque and the rated braking torque; determining a braking torque deviation rate of the hydraulic retarder according to a ratio of the braking torque deviation to the rated braking torque; Determining the current filling rate state of the hydraulic retarder according to the braking torque deviation rate includes: If the braking torque deviation rate is equal to a preset deviation rate threshold, determining that the current filling rate state of the hydraulic retarder is equal to a calibrated filling rate; If the braking torque deviation rate is less than the preset deviation rate threshold, determining that the current filling rate state of the hydraulic retarder is lower than the calibrated filling rate; If the braking torque deviation rate is greater than the preset deviation rate threshold, determining that the current filling rate state of the hydraulic retarder is higher than a calibrated filling rate; The preset deviation rate threshold is 0, the calibrated filling rate refers to the pre-calibrated filling rate of the hydraulic retarder corresponding to the current braking torque of the hydraulic retarder being equal to the rated braking torque, and the degree of difference between the braking torque deviation rate and the preset deviation rate threshold is positively correlated with the degree of difference between the current filling rate of the hydraulic retarder and the calibrated filling rate.

2. The method according to claim 1, characterized in that The working states of the hydraulic retarder include the hydraulic retarder being in constant speed gear mode, the hydraulic retarder being in fixed gear mode, the whole vehicle being in cruise mode, the whole vehicle being in adaptive cruise mode, the whole vehicle being in variable speed adjustment mode and the whole vehicle being in automatic driving mode.

3. The method according to claim 1, characterized in that Determining a target braking torque of the hydraulic retarder according to the current vehicle information includes: The current braking torque of the hydraulic retarder is determined by a preset formula, and the expression of the preset formula is: T1=(Mg sinα-K0·S·V 2 -μMg cosα-δ·dv / dt)·r0 / i0; Among them, T1 is the current braking torque, M is the vehicle mass, g is the acceleration of gravity, α is the slope of the road on which the vehicle is located, K0 is the vehicle drag coefficient, S is the vehicle's frontal area, V is the vehicle speed, μ is the vehicle and road resistance coefficient, δ is the vehicle's rotational mass conversion coefficient, r0 is the wheel radius, i0 is the drive axle speed ratio, and dv / dt is the vehicle's braking deceleration.

4. The method according to claim 1, wherein Determining a target braking torque of the hydraulic retarder according to the current vehicle information includes: determining a rated braking torque of the hydraulic retarder based on a pre-calibrated hydraulic retarder characteristic curve; The hydraulic retarder characteristic curve is used to describe the mapping relationship between the hydraulic retarder working state, the hydraulic retarder control air pressure, the vehicle shaft speed and the hydraulic retarder rated braking torque.

5. The method according to claim 1, characterized in that Before determining the target braking torque of the hydraulic retarder according to the current vehicle information, the method further includes: Performing data synchronization on the current vehicle information; Accordingly, determining the target braking torque of the hydraulic retarder according to the current vehicle information includes: The target braking torque of the hydraulic retarder is determined according to the current vehicle information after data synchronization.

6. A device for determining the filling rate state of a hydraulic retarder, characterized in that: The device comprises: a current vehicle information determining module, configured to determine the current vehicle information of the target vehicle when detecting that the hydraulic retarder of the target vehicle is in an operating state; a target braking torque determination module, configured to determine a target braking torque of the hydraulic retarder according to the current vehicle information, wherein the target braking torque includes a current braking torque and a rated braking torque; a braking torque deviation rate determining module, configured to determine a braking torque deviation rate of the hydraulic retarder according to the target braking torque; The braking torque deviation rate determination module is specifically configured to: determine the braking torque deviation of the hydraulic retarder according to the difference between the current braking torque and the rated braking torque; and determine the braking torque deviation rate of the hydraulic retarder according to the ratio of the braking torque deviation to the rated braking torque; a current filling rate state determining module, configured to determine a current filling rate state of the hydraulic retarder according to the braking torque deviation rate; The current filling rate state determination module is specifically used to: If the braking torque deviation rate is equal to a preset deviation rate threshold, determining that the current filling rate state of the hydraulic retarder is equal to a calibrated filling rate; If the braking torque deviation rate is less than the preset deviation rate threshold, determining that the current filling rate state of the hydraulic retarder is lower than the calibrated filling rate; If the braking torque deviation rate is greater than the preset deviation rate threshold, determining that the current filling rate state of the hydraulic retarder is higher than a calibrated filling rate; The preset deviation rate threshold is 0, the calibrated filling rate refers to the pre-calibrated filling rate of the hydraulic retarder corresponding to the current braking torque of the hydraulic retarder being equal to the rated braking torque, and the degree of difference between the braking torque deviation rate and the preset deviation rate threshold is positively correlated with the degree of difference between the current filling rate of the hydraulic retarder and the calibrated filling rate.

7. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the method for determining the filling rate state of the hydraulic retarder according to any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the method for determining the filling rate state of a hydraulic retarder according to any one of claims 1 to 5 when executed.

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