Hydraulic system health assessment method, device and vehicle

Abstract

The present application relates to a method, device and vehicle for evaluating the health of a hydraulic system, and relates to the field of vehicle technology, particularly the field of vehicle health evaluation technology. The method includes: determining the health evaluation type of a component in a vehicle's hydraulic system based on its component type, maintenance information and failure mode; the maintenance information characterizes whether the component is a maintenance-free component; for components of each health evaluation type, determining the health index of the component based on the component's operating parameter information; wherein the operating parameter information is associated with the health evaluation type; and determining the health of the hydraulic system based on the health index of each component and the functional evaluation index of the hydraulic system. Targeted health evaluation of each component is achieved, and further, combined with the functional evaluation index of the hydraulic system, a comprehensive and accurate health evaluation of the hydraulic system is performed.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, in particular to the field of vehicle health assessment technology, and specifically to a method, device and vehicle for assessing the health of a hydraulic system. Background Art

[0002] Having a car break down on the road is not only a frustrating thing, but also a very dangerous thing. Therefore, it is necessary for drivers to check the status of their vehicles before traveling.

[0003] Like the human body, a car is made up of many parts. The hydraulic system is a transmission system that uses liquid pressure to transfer and control energy. It plays a key role in the vehicle, just like the muscles in the human body. It is distributed in subsystems such as the engine, transmission, brakes, steering, and suspension. It receives instructions from the controller and controls and drives the actuators to complete the instructions.

[0004] Accurately assessing the health of a vehicle's hydraulic system is extremely important. Traditional assessment methods often focus on a single factor. When the hydraulic system is detected to be malfunctioning, an error message is displayed to the user. This one-sided assessment method fails to fully reflect the actual condition of the hydraulic system, resulting in potential problems not being discovered in a timely manner, which may ultimately cause the vehicle to break down. Summary of the Invention

[0005] The present application provides a method, device and vehicle for evaluating the health of a hydraulic system, which enables targeted health evaluation of each component, and further combines the functional evaluation indicators of the hydraulic system to conduct a comprehensive and accurate health evaluation of the hydraulic system.

[0006] According to a first aspect of the present application, a method for assessing the health of a hydraulic system is provided, the method comprising:

[0007] Determine the component health assessment type based on the component type, maintenance information, and failure mode of the component in the vehicle's hydraulic system; the maintenance information indicates whether the component is maintenance-free;

[0008] For each component of each health assessment type, a health index of the component is determined based on the operating parameter information of the component; wherein the operating parameter information is associated with the health assessment type;

[0009] Determine the health of the hydraulic system based on the health indicators of each component and the functional evaluation indicators of the hydraulic system.

[0010] By adopting the embodiment of the present application, different health assessment types are determined based on the component type, maintenance information and failure mode of the components in the hydraulic system. For each health assessment type, the operating parameter information associated with it is determined, and for specific components, the health index is calculated using the corresponding operating parameter information. It is possible to conduct a targeted health assessment of each component, and further combine the functional assessment indicators of the hydraulic system to conduct a comprehensive and accurate health assessment of the hydraulic system. Compared with an assessment based only on the output function and performance of the hydraulic system, it reduces the probability of misjudgment that the component is close to failure but the assessed health score is still high.

[0011] In one possible approach, for each component of each health assessment type, the component health index is determined based on the component's operating parameter information, including:

[0012] For components of each health assessment type, equivalent operation information is determined based on the operation parameter information; the equivalent operation information is the equivalent operation time or the equivalent number of operation actions;

[0013] The health index of each component is determined based on the equivalent operation information and the expected operation information of each component; the expected operation information is the expected operation time or the expected number of operation actions.

[0014] In one possible approach, the health assessment types include: a first assessment type, a second assessment type, and a third assessment type;

[0015] The first evaluation type represents the type of failure proportional to the first operating time; the first operating time is the cumulative operating time of the vehicle;

[0016] The second evaluation type represents the type of failure proportional to the second operating time; the second operating time is the cumulative operating time of the vehicle meeting the preset operating conditions;

[0017] The third evaluation type represents the type of failure that is proportional to the cumulative number of times the component performs the preset actions.

[0018] In one possible manner, the operating parameter information associated with the first evaluation type includes the accumulated operating time of the vehicle;

[0019] For components of each health assessment type, equivalent operating information is determined based on operating parameter information, including:

[0020] For a component of the first evaluation type, an equivalent operating time of the component is determined based on the vehicle's cumulative operating time and a first equivalent time coefficient.

[0021] In one possible manner, the operating parameter information associated with the second evaluation type includes an operating condition of a drive unit of the hydraulic system;

[0022] For components of each health assessment type, equivalent operating information is determined based on operating parameter information, including:

[0023] For the components of the second evaluation type, determining the cumulative operating time of the drive unit that meets each operating condition based on the operating condition of the drive unit;

[0024] The accumulated operating time of the drive unit is superimposed according to the equivalent time coefficient corresponding to each operating condition to determine the equivalent operating time of the component.

[0025] In one possible manner, the operating parameter information associated with the third evaluation type includes variable parameter information of a control current, where the control current is used to control a component of the third evaluation type;

[0026] For components of each health assessment type, equivalent operating information is determined based on operating parameter information, including:

[0027] For the components of the third evaluation type, the change parameter information of the control current is converted into the number of operating actions, and accumulated to obtain the equivalent number of operating actions.

[0028] In one possible approach, the health of the hydraulic system is determined based on the health indicators of each component and the functional evaluation indicators of the hydraulic system, including:

[0029] Based on the first weight of each component and the second weight of the functional evaluation index, the health index of each component and the functional evaluation index of the hydraulic system are weighted to obtain the health of the hydraulic system.

[0030] In one possible manner, the first weight represents the importance of the component in the hydraulic system, and the first weight is calculated based on the severity and failure frequency of the failure type of the component.

[0031] According to a second aspect of the present application, a device for evaluating the health of a hydraulic system is provided, the device comprising:

[0032] A first determination module is configured to determine a component health assessment type based on a component type, maintenance information, and failure mode of a component in a hydraulic system of a vehicle; the maintenance information indicates whether the component is a maintenance-free component;

[0033] a second determination module for determining, for each component of each health assessment type, a component health index based on operating parameter information of the component, wherein the operating parameter information is associated with the health assessment type;

[0034] The third determination module is used to determine the health of the hydraulic system based on the health indicators of each component and the functional evaluation indicators of the hydraulic system.

[0035] In one possible embodiment, the second determining module is specifically configured to:

[0036] For components of each health assessment type, equivalent operation information is determined based on the operation parameter information; the equivalent operation information is the equivalent operation time or the equivalent number of operation actions;

[0037] The health index of each component is determined based on the equivalent operation information and the expected operation information of each component; the expected operation information is the expected operation time or the expected number of operation actions.

[0038] In one possible approach, the health assessment types include: a first assessment type, a second assessment type, and a third assessment type;

[0039] The first evaluation type represents the type of failure proportional to the first operating time; the first operating time is the cumulative operating time of the vehicle;

[0040] The second evaluation type represents the type of failure proportional to the second operating time; the second operating time is the cumulative operating time of the vehicle meeting the preset operating conditions;

[0041] The third evaluation type represents the type of failure that is proportional to the cumulative number of times the component performs the preset actions.

[0042] In one possible manner, the operating parameter information associated with the first evaluation type includes the accumulated operating time of the vehicle;

[0043] The second determination module is specifically configured to:

[0044] For a component of the first evaluation type, an equivalent operating time of the component is determined based on the vehicle's cumulative operating time and a first equivalent time coefficient.

[0045] In one possible manner, the operating parameter information associated with the second evaluation type includes an operating condition of the drive unit;

[0046] The second determination module is specifically configured to:

[0047] For the components of the second evaluation type, determining the cumulative operating time of the drive unit that meets each operating condition based on the operating condition of the drive unit;

[0048] The accumulated operating time of the drive unit is superimposed according to the equivalent time coefficient corresponding to each operating condition to determine the equivalent operating time of the component.

[0049] In one possible manner, the operating parameter information associated with the third evaluation type includes variable parameter information of a control current, where the control current is used to control a component of the third evaluation type;

[0050] The second determination module is specifically configured to:

[0051] For the components of the third evaluation type, the change parameter information of the control current is converted into the number of operating actions, and accumulated to obtain the equivalent number of operating actions.

[0052] In one possible embodiment, the third determining module is specifically configured to:

[0053] Based on the first weight of each component and the second weight of the functional evaluation index, the health index of each component and the functional evaluation index of the hydraulic system are weighted to obtain the health of the hydraulic system.

[0054] In one possible manner, the first weight represents the importance of the component in the hydraulic system, and the first weight is calculated based on the severity and failure frequency of the failure type of the component.

[0055] According to the third aspect provided by the present application, a vehicle is provided, comprising: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to execute instructions to implement the method of the above-mentioned first aspect and any possible implementation method thereof.

[0056] According to the fourth aspect provided by the present application, a computer-readable storage medium is provided. When the instructions in the computer-readable storage medium are executed by the processor of an electronic device, the electronic device is enabled to execute the method in the above-mentioned first aspect and any possible implementation method thereof.

[0057] According to the fifth aspect provided by the present application, a computer program product is provided, which includes computer instructions. When the computer instructions are executed on an electronic device, the electronic device executes the method of the above-mentioned first aspect and any possible implementation method thereof.

[0058] It should be noted that the technical effects brought about by any implementation method in the second to fifth aspects can refer to the technical effects brought about by the corresponding implementation method in the first aspect, and will not be repeated here.

[0059] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] The drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application, and do not constitute an improper limitation on the present application.

[0061] Figure 1 is a schematic structural diagram of a hydraulic system of a vehicle according to an exemplary embodiment;

[0062] Figure 2 is a flow chart illustrating a method for evaluating the health of a hydraulic system according to an exemplary embodiment;

[0063] Figure 3 is a block diagram of a device for evaluating the health of a hydraulic system according to an exemplary embodiment;

[0064] Figure 4 It is a block diagram of an electronic device according to an exemplary embodiment. DETAILED DESCRIPTION

[0065] In order to enable ordinary people in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0066] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0067] In the embodiments of this application, words such as "exemplary," "for example," or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary," "for example," or "for example" in the embodiments of this application should not be interpreted as being more preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary," "for example," or "for example" is intended to present the relevant concepts in a concrete manner.

[0068] Like the human body, a car is made up of many parts. The hydraulic system is a transmission system that uses liquid pressure to transfer and control energy. It plays a key role in the vehicle, just like the muscles in the human body. It is distributed in subsystems such as the engine, transmission, brakes, steering, and suspension. It receives instructions from the controller and controls and drives the actuators to complete the instructions.

[0069] Accurately assessing the health of a vehicle's hydraulic system is extremely important. Traditional assessment methods often focus on a single factor. When the hydraulic system is detected to be malfunctioning, an error message is displayed to the user. This one-sided assessment method fails to fully reflect the actual condition of the hydraulic system, resulting in potential problems not being discovered in a timely manner, which may ultimately cause the vehicle to break down.

[0070] Traditional hydraulic system health assessment methods focus solely on the system's output functions and performance. Hydraulic systems are complex systems comprised of numerous subsystems and components, each with its own failure modes over time or mileage. If health assessments are conducted solely based on system output functions and performance, it's easy for certain components to be near failure while still receiving a high health score. This can lead to users misjudging the vehicle's status and potentially causing serious safety incidents.

[0071] In view of this, the present application provides a method, device and vehicle for evaluating the health of a hydraulic system to address the above-mentioned pain points, achieve a comprehensive and accurate health evaluation of the hydraulic system, and reduce the probability of misjudgment when a component is close to failure but the evaluated health score is still high.

[0072] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0073] The embodiments of the present application relate to a vehicle to be tested, where the vehicle may also be referred to as a vehicle, a mobile carrier, an electric vehicle (EV), a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHEV), a fuel cell vehicle (FCV), an autonomous vehicle, an intelligent and connected vehicle (ICV), a driverless vehicle, etc.

[0074] In the embodiments of this application, the vehicle may be a sedan, a sport utility vehicle (SUV), a truck, an electric vehicle, a motorcycle, a tricycle, a special vehicle (such as an ambulance, fire truck, or police car), a driverless taxi, an intelligent connected bus, an autonomous logistics vehicle, an electric truck, etc. Furthermore, this method is also applicable to various specialized vehicles, such as agricultural vehicles, mining vehicles, forestry vehicles, airport vehicles, and port vehicles. This application does not impose any specific restrictions on this.

[0075] For ease of understanding, the following is a detailed introduction to the health assessment method of the hydraulic system provided by this application with reference to the accompanying drawings. Figure 2 , the method may include the following steps:

[0076] S201: Determine a component health assessment type based on the component type, maintenance information, and failure mode of the component in the vehicle's hydraulic system; the maintenance information indicates whether the component is a maintenance-free component.

[0077] A vehicle's hydraulic system includes multiple components. Different components operate in different modes, resulting in different wear and failure modes during operation. In this embodiment, components are pre-classified based on their component type, maintenance information, and failure mode to generate different health assessment types. Component health indicators are subsequently evaluated using different methods for each health assessment type.

[0078] Depending on the structure of the hydraulic system, component types can include power elements, control elements, actuators, and auxiliary elements. Power elements can include hydraulic pumps, such as oil pumps, which are the power source of the hydraulic system and convert mechanical energy into liquid pressure energy. Control elements primarily consist of various valves, including solenoid valves and mechanical valves, which are primarily integrated into the hydraulic control module. Actuators primarily include hydraulic cylinders, such as oil cylinders, whose components primarily include shift pistons and clutch pistons. Auxiliary elements can include filters, accumulators, and pipelines.

[0079] For details, see Figure 1 The hydraulic system may include: an oil suction filter 1, an oil pump 2, a pressure filter 3, a hydraulic control module 4, a first pressure control valve 401, a second pressure control valve 402, a pressure sensor 403, a filter 404, a gear piston 405, a first shift flow control valve 406, a second shift flow control valve 407, a third shift flow control valve 408, a fourth shift flow control valve 409, a first shift pressure control valve 410, a second shift pressure control valve 411, a lubrication flow valve 412, a lubrication pressure limiting valve 413, a system pressure control valve 414, a system pressure limiting valve 415, a valve plate assembly 416, and an oil pipe 5.

[0080] Figure 1 Also shown are the first clutch 11, the second clutch 12, the first shift fork 111, the second shift fork 112, the third shift fork 113, the fourth shift fork 114, a shaft lubrication device, and a clutch lubrication device. The first pressure control valve 401 is used to control the first clutch 11, and the second pressure control valve 402 is used to control the second clutch 12. The first shift flow control valve 406 is used to control the first shift fork 111, the second shift flow control valve 407 is used to control the second shift fork 112, the third shift flow control valve 408 is used to control the third shift fork 113, and the fourth shift flow control valve 409 is used to control the fourth shift fork 114.

[0081] In the embodiments of the present application, maintenance information indicates whether a component is maintenance-free. Specifically, in a hydraulic system, while the service life of most components can be extended through regular maintenance, some components, such as seals and disposable filter elements, must be replaced directly upon damage and cannot be repaired through maintenance. Based on maintenance information, it is possible to determine whether a component is maintenance-free or not.

[0082] In hydraulic systems, different components have different failure modes due to their different working modes, which may include blockage, ablation, wear and seizure.

[0083] In the embodiment of the present application, the components in the hydraulic system are classified into different health assessment types by comprehensively considering the component type, maintenance information, and failure mode of the components. For details, see Table 1, which is a component classification table.

[0084] Table 1

[0085]

[0086] Specifically, in some embodiments of the present application, the health assessment indicator types may include: a first assessment type, a second assessment type, and a third assessment type. Among them, the first assessment type corresponds to the classification "Ⅰ" type in Table 1, which characterizes the type of failure proportional to the first operating time, and the first operating time is the cumulative operating time of the vehicle. The second assessment type corresponds to the classification "Ⅱ" type in Table 1, which characterizes the type of failure proportional to the second operating time, and the second operating time is the cumulative operating time of the vehicle meeting the preset operating conditions. The third assessment type corresponds to the classification "Ⅲ" type in Table 1, which characterizes the type of failure proportional to the cumulative number of times the component runs the preset action.

[0087] Table 1 also shows the "IV" classification. Components of this type have no relative motion or very little relative motion. Except for initial failures caused by manufacturing, they are almost impossible to fail. Their lifespan can be considered permanent, so they can be excluded from the subsequent component health assessment process.

[0088] S202: For each component of each health assessment type, determine a health index of the component based on operating parameter information of the component; wherein the operating parameter information is associated with the health assessment type.

[0089] In the embodiment of the present application, for components of different health assessment types, different operating parameter information can be considered to calculate the component loss and further determine the component health index. The operating parameter information is associated with the health assessment type.

[0090] For example, for the first assessment type, since components fail proportionally with the vehicle's cumulative operating time, the operating parameter information associated with the first assessment type may be the vehicle's cumulative operating time. For the second assessment type, since components fail proportionally with the cumulative operating time the vehicle meets preset operating conditions, the operating parameter information associated with the second assessment type may include vehicle operating parameters. For the third assessment type, since components fail proportionally with the cumulative number of times they perform preset actions, the operating parameter information associated with the third assessment type may include the variation parameters of the control current used to control the component to perform the preset action.

[0091] Specifically, the health assessment method of the hydraulic system provided in the embodiment of the present application can be integrated into the vehicle's transmission controller. The vehicle's transmission controller is a key component of the vehicle's electronic control system, responsible for monitoring and managing the transmission system. It improves the vehicle's power, economy, and driving comfort by receiving sensor signals, executing shift control, ensuring smooth shifting, and realizing fault diagnosis and protection.

[0092] During vehicle operation, the transmission controller can collect real-time statistics on the operating parameters of each component, such as the vehicle's cumulative operating time, operating parameters that meet specific operating conditions, and change parameters of the control current used to control components to perform preset actions.

[0093] Then, for components of different health assessment types, the equivalent operating time or equivalent number of operating actions of the components is calculated based on the associated operating parameter information. Combined with the pre-set expected operating time or expected number of operating actions, the real-time loss of the components can be evaluated, and the health indicators of each component can be determined.

[0094] S203: Determine the health of the hydraulic system based on the health indicators of each component and the functional evaluation indicators of the hydraulic system.

[0095] To evaluate the health of the hydraulic system, it is also necessary to determine whether the functions of the hydraulic system are operating well. Therefore, in the embodiment of the present application, the functional evaluation index is determined based on the functional operation of the hydraulic system.

[0096] The core functions of the hydraulic system are controlling clutch pressure, shifting, and clutch lubrication. Functional evaluation indicators are determined based on the operation of these functions.

[0097] In one embodiment of the present application, the operational status of a function indicates whether the function is operating normally, which can also be understood as whether a hydraulic system failure has occurred. Specifically, multiple fault codes can be pre-defined and classified into different types. Among them, the fault code is used to describe a hydraulic system failure, such as abnormal main pump pressure, slew brake failure, and unbalanced travel pressure.

[0098] The above fault codes can be classified in advance, and each fault code type corresponds to a different health deduction coefficient.

[0099] For example, see Table 2, which lists several fault code types and corresponding health processing rules.

[0100] In one embodiment of the present application, for the functional evaluation index of the hydraulic system, the specific evaluation method can be: set the initial health degree to 100%, deduct the corresponding health degree each time a fault code appears, increase the corresponding health degree each time a fault is detected and repaired, and multiply the current health degree by a preset coefficient to obtain a functional performance index.

[0101] Table 2

[0102]

[0103] In one embodiment of the present application, a weighted calculation is performed on the health index of each component and the functional evaluation index of the hydraulic system to obtain the health of the hydraulic system.

[0104] By adopting the embodiment of the present application, different health assessment types are determined based on the component type, maintenance information and failure mode of the components in the hydraulic system. For each health assessment type, the operating parameter information associated with it is determined, and for specific components, the health index is calculated using the corresponding operating parameter information. It is possible to conduct a targeted health assessment of each component, and further combine the functional assessment indicators of the hydraulic system to conduct a comprehensive and accurate health assessment of the hydraulic system. Compared with an assessment based only on the output function and performance of the hydraulic system, it reduces the probability of misjudgment that the component is close to failure but the assessed health score is still high.

[0105] In some embodiments of the present application, for components of each health assessment type, equivalent operating information is determined based on operating parameter information, including: for components of a first assessment type, equivalent operating information is determined based on the vehicle's accumulated operating time and a first equivalent time coefficient.

[0106] The first evaluation type characterizes the type of failure proportional to the first operating time, which may specifically include accessories such as filters, oil pipes, and seals, whose performance gradually decays with the increase of time / mileage until they completely lose their function.

[0107] For such parts, record the cumulative running time of the vehicle , according to the equivalent time coefficient , calculate the equivalent runtime .

[0108] .

[0109] The health index is further calculated based on the following formula :

[0110] .

[0111] Indicates the equivalent total working hours corresponding to the full life of the component, for example The value is 2000 hours, the equivalent time coefficient The value is taken as 0.05.

[0112] In some embodiments of the present application, the operating parameter information associated with the second assessment type includes the operating condition of a drive unit of a hydraulic system; for components of each health assessment type, determining equivalent operating information based on the operating parameter information includes:

[0113] For the components of the second evaluation type, determining the cumulative operating time of the drive unit that meets each operating condition based on the operating condition of the drive unit;

[0114] The accumulated operating time of the drive unit is superimposed according to the equivalent time coefficient corresponding to each operating condition to determine the equivalent operating time of the component.

[0115] Specifically, the second assessment type represents a failure type that is proportional to the second operating time. The second operating time is the cumulative operating time that the vehicle meets the preset operating conditions. In other words, only when the vehicle meets the preset operating conditions is the component of the second assessment type considered to have experienced wear and tear.

[0116] In some embodiments of the present application, components of the second evaluation type may include oil pumps, electronic pumps, etc. The oil pumps and electronic pumps may degrade in performance or even fail due to wear as mileage increases.

[0117] Taking the oil pump as an example, in a hydraulic system, a drive unit (e.g., an engine) moves the pump's internal components (such as gears, plungers, and vanes), converting mechanical energy into fluid pressure. During this process, the engine's speed and line pressure significantly impact the pump's losses. Accordingly, the drive unit's operating conditions can include engine speed and line pressure. The engine's line pressure typically refers to the main oil gallery pressure, which is the pressure exerted by the engine oil on the walls of the main oil gallery.

[0118] For the above considerations, in an embodiment of the present application, the operating conditions of the drive unit can be set in advance according to the operating conditions of the drive unit, and can be specifically set based on the engine speed and main pressure.

[0119] Table 3

[0120]

[0121] For example, see Table 3, which lists six operating conditions, each of which corresponds to an equivalent time coefficient. The unit of speed is revolutions per minute (RPM), and the unit of main pressure is bar.

[0122] Based on the above-mentioned different engine operating conditions, during the operation of the vehicle, the transmission controller can count in real time which operating condition the engine's operating condition meets, and record the corresponding cumulative operating time of the drive unit.

[0123] When calculating the health index of the components of the second evaluation type, the accumulated operating time of the drive unit is superimposed according to the equivalent time coefficient corresponding to each operating condition to determine the equivalent operating time of the component.

[0124] In some embodiments of the present application, the operating parameter information associated with the third evaluation type includes change parameter information of a control current, and the control current is used to control components of the third evaluation type.

[0125] Correspondingly, for components of each health assessment type, equivalent operating information is determined based on the operating parameter information, which may specifically include: for components of the third assessment type, converting the changing parameter information of the control current into the number of operating actions, and accumulating them to obtain the equivalent number of operating actions.

[0126] Specifically, the third evaluation type represents the type of failure that is proportional to the cumulative number of times a component performs a preset action, and specifically may include various control valves in a hydraulic control module.

[0127] In hydraulic systems, the output (pressure, flow) of a control valve can vary continuously with an input electrical signal, and its operating state is closely related to the continuous variation of current. For example, an electro-hydraulic proportional control valve receives a continuously varying electrical signal and converts it into a corresponding hydraulic output. This conversion is typically achieved using an electromagnet, whose electromagnetic force is proportional to the input current. This allows for continuous control of the valve core position, and thus the valve opening, to achieve continuous control of the hydraulic system's pressure, flow, and flow direction.

[0128] Therefore, for various control valves in the hydraulic system, the continuous change of the related control current is closely related to the opening and closing action of the control valve, thereby affecting the life of the control valve.

[0129] Based on the above considerations, in the embodiment of the present application, a correlation relationship between the continuous change of current and the number of operating actions is established for each component of the third evaluation type.

[0130] For example, referring to Table 4, valve action count rules are set for various control valves in the hydraulic system.

[0131] Table 4

[0132]

[0133] For example, for the system pressure control valve, for the continuous change of the associated control current, if the current continuously changes below 200 mA, it is recorded as 0 times, if it changes between 200-800 mA, it is recorded as 0.2 times, and if it changes between 800 mA and above, it is recorded as 0.5 times.

[0134] During vehicle operation, the transmission controller monitors the change parameter information of the control current associated with the system pressure control valve, converts the change parameter information into the number of operating actions, and accumulates the information to obtain the equivalent number of operating actions.

[0135] In some embodiments of the present application, determining the health of the hydraulic system based on the health indicators of each component and the functional evaluation indicators of the hydraulic system includes:

[0136] Based on the first weight of each component and the second weight of the functional evaluation index, the health index of each component and the functional evaluation index of the hydraulic system are weighted to obtain the health of the hydraulic system.

[0137] Specifically, the working modes and failure types of components in the hydraulic system are different. The first weight can be calculated in advance based on the severity and failure frequency of the failure type of each component. The first weight represents the importance of the component in the hydraulic system.

[0138] For example, the severity of the failure can be reflected in the form of a score of 1-10, with 10 points being the highest severity and 1 point being the lowest; 9-10 points being failure to meet safety / regulatory requirements, 7-8 points being loss or degradation of basic functions, 5-6 points being loss or degradation of minor functions, 2-4 points being other functional malfunctions, and 1 being no impact.

[0139] The frequency of failure can be reflected in the form of a score of 1-10, with 10 being the highest frequency and 1 being the lowest; 10 being very high, 7-9 being inevitable with a high frequency of failure, 4-6 being occasional failure, 2-3 being individual failures, and 1 being an extremely low failure rate.

[0140] Calculate the component's importance by combining the severity and frequency of failures. For example, calculate the product of the severity score and the frequency score and round it off to the nearest integer.

[0141] For example, see Table 5, which lists typical failure modes, failure severity, failure frequency, and importance of multiple components.

[0142] Table 5

[0143]

[0144] Furthermore, the first weight of each component is determined based on its importance. For example, if the oil pump's importance is 2, the first weight of the oil pump can be set to 2%, and so on. In this embodiment of the present application, the second weight corresponding to the functional evaluation index can be further calculated by adding up the first weights corresponding to each component. For example, if the first weights corresponding to each component are added together to equal 60%, the second weight corresponding to the functional evaluation index is 1-60% = 40%.

[0145] By adopting the embodiment scheme of the present application, the components in the system are first classified and their importance is evaluated based on the hydraulic principles and the importance of their impact on the system functions and performance. Then, a health assessment strategy for each type of component is formulated based on the hydraulic principles and component failure modes. Then, according to the importance of each type of component, its weight is determined. The operating parameter information of each component and the corresponding health assessment strategy are used to calculate the equivalent operating time or equivalent number of operating actions of the component, and then a health score is obtained. At the same time, the health score of the hydraulic system's functional performance is evaluated using the vehicle data, and finally a comprehensive calculation is performed to obtain the final health score. It is possible to conduct targeted health assessments of each component, further functional evaluation indicators of the hydraulic system, and conduct a comprehensive and accurate health assessment of the hydraulic system.

[0146] The above mainly introduces the solution provided by the embodiment of the present application from the perspective of method. In order to realize the above functions, the parking monitoring device or electronic device of the vehicle includes hardware structures and / or software modules corresponding to the execution of each function. It should be easy for those skilled in the art to realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0147] In the embodiment of the present application, the exemplary hydraulic system health assessment device or electronic device can be divided into functional modules according to the above method. For example, the hydraulic system health assessment device or electronic device can include various functional modules corresponding to the various functional divisions, or two or more functions can be integrated into one processing module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical functional division. There may be other division methods in actual implementation.

[0148] Figure 3 FIG. 1 is a block diagram of a device for evaluating the health of a hydraulic system according to an exemplary embodiment. Figure 3 The health assessment device of the hydraulic system includes a first determination module 301 , a second determination module 302 and a third determination module 303 .

[0149] A first determination module 301 is configured to determine a health assessment type of a component in a hydraulic system of a vehicle based on its component type, maintenance information, and failure mode; the maintenance information indicates whether the component is maintenance-free.

[0150] A second determining module 302 is configured to determine, for each component of the health assessment type, a health index of the component based on operating parameter information of the component, wherein the operating parameter information is associated with the health assessment type;

[0151] The third determination module 303 is configured to determine the health of the hydraulic system according to the health index of each component and the functional evaluation index of the hydraulic system.

[0152] In one possible manner, the second determining module 302 is specifically configured to:

[0153] For components of each health assessment type, equivalent operation information is determined based on the operation parameter information; the equivalent operation information is the equivalent operation time or the equivalent number of operation actions;

[0154] The health index of each component is determined based on the equivalent operation information and the expected operation information of each component; the expected operation information is the expected operation time or the expected number of operation actions.

[0155] In one possible approach, the health assessment types include: a first assessment type, a second assessment type, and a third assessment type;

[0156] The first evaluation type represents the type of failure proportional to the first operating time; the first operating time is the cumulative operating time of the vehicle;

[0157] The second evaluation type represents the type of failure proportional to the second operating time; the second operating time is the cumulative operating time of the vehicle meeting the preset operating conditions;

[0158] The third evaluation type represents the type of failure that is proportional to the cumulative number of times the component performs the preset actions.

[0159] In one possible manner, the operating parameter information associated with the first evaluation type includes the accumulated operating time of the vehicle;

[0160] The second determining module 302 is specifically configured to:

[0161] For a component of the first evaluation type, an equivalent operating time of the component is determined based on the vehicle's cumulative operating time and a first equivalent time coefficient.

[0162] In one possible manner, the operating parameter information associated with the second evaluation type includes an operating condition of the drive unit;

[0163] The second determining module 302 is specifically configured to:

[0164] For the components of the second evaluation type, determining the cumulative operating time of the drive unit that meets each operating condition based on the operating condition of the drive unit;

[0165] The accumulated operating time of the drive unit is superimposed according to the equivalent time coefficient corresponding to each operating condition to determine the equivalent operating time of the component.

[0166] In one possible manner, the operating parameter information associated with the third evaluation type includes variable parameter information of a control current, where the control current is used to control a component of the third evaluation type;

[0167] The second determining module 302 is specifically configured to:

[0168] For the components of the third evaluation type, the change parameter information of the control current is converted into the number of operating actions, and accumulated to obtain the equivalent number of operating actions.

[0169] In one possible manner, the third determining module 303 is specifically configured to:

[0170] Based on the first weight of each component and the second weight of the functional evaluation index, the health index of each component and the functional evaluation index of the hydraulic system are weighted to obtain the health of the hydraulic system.

[0171] In one possible manner, the first weight represents the importance of the component in the hydraulic system, and the first weight is calculated based on the severity and failure frequency of the failure type of the component.

[0172] Figure 4 FIG. 1 is a block diagram of an electronic device according to an exemplary embodiment. Figure 4 As shown, the electronic device includes but is not limited to: a processor 4001 and a memory 4002.

[0173] The memory 4002 is used to store executable instructions of the processor 4001. It is understandable that the processor 4001 is configured to execute instructions to implement the health assessment method of the hydraulic system in the above embodiment.

[0174] It should be noted that those skilled in the art can understand that Figure 4 The electronic device structure shown in the figure does not limit the electronic device, and the electronic device may include Figure 4 More or fewer components may be shown, or certain components may be combined, or the components may be arranged differently.

[0175] The processor 4001 is the control center of the electronic device. It uses various interfaces and lines to connect the various parts of the entire electronic device. By running or executing software programs and / or modules stored in the memory 4002 and calling data stored in the memory 4002, it performs various functions of the electronic device and processes data, thereby monitoring the electronic device as a whole. The processor 4001 may include one or more processing units. Optionally, the processor 4001 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, and the modem processor mainly handles wireless communications. It is understandable that the above-mentioned modem processor may not be integrated into the processor 4001.

[0176] Memory 4002 can be used to store software programs and various data. Memory 4002 may primarily include a program storage area and a data storage area. The program storage area may store an operating system and application programs required by at least one functional module (such as a determination unit, a processing unit, etc.). Furthermore, memory 4002 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0177] In an exemplary embodiment, a computer-readable storage medium including instructions is further provided, such as a memory 4002 including instructions. The above instructions can be executed by a processor 4001 of an electronic device to implement the method in the above embodiment.

[0178] Optionally, the computer-readable storage medium may be a non-temporary computer-readable storage medium, for example, the non-temporary computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0179] In an exemplary embodiment, the present application also provides a computer program product including one or more instructions, which can be executed by a processor of an electronic device to implement the method in the above embodiment.

[0180] It should be noted that when the instructions in the above-mentioned computer-readable storage medium or one or more instructions in the computer program product are executed by the processor of the electronic device, the various processes of the above-mentioned method embodiment are implemented and the same technical effect as the above-mentioned method can be achieved. To avoid repetition, they will not be repeated here.

[0181] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0182] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0183] Units described as separate components may or may not be physically separate, and components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple places. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0184] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0185] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application, or the part that contributes to the existing technology, or all or part of the technical solution can be embodied in the form of a software product. The software product is stored in a storage medium and includes a number of instructions for causing a device (which can be a single-chip microcomputer, chip, etc.) or a processor to execute all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, ROM, RAM, disk or optical disk, etc. Various media that can store program code.

[0186] The above are only specific embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any changes or replacements within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A method for evaluating the health of a hydraulic system, characterized in that: The method comprises: The health assessment type of a component in a hydraulic system of a vehicle is determined based on its component type, maintenance information, and failure mode; the maintenance information indicates whether the component is a maintenance-free component; the health assessment types include: a first assessment type, a second assessment type, and a third assessment type; the first assessment type indicates a type of failure proportional to a first operating time; the first operating time is the cumulative operating time of the vehicle; the second assessment type indicates a type of failure proportional to a second operating time; the second operating time is the cumulative operating time of the vehicle meeting a preset operating condition; the third assessment type indicates a type of failure proportional to the cumulative number of times the component performs a preset action; For each component of the health assessment type, determining a health index of the component based on operating parameter information of the component; wherein the operating parameter information is associated with the health assessment type; The health of the hydraulic system is determined based on the health index of each of the components and the functional evaluation index of the hydraulic system.

2. The method for evaluating the health of a hydraulic system according to claim 1, wherein: For each component of the health assessment type, determining the health index of the component based on the operating parameter information of the component includes: For each component of the health assessment type, determining equivalent operation information based on the operation parameter information; the equivalent operation information is equivalent operation time or equivalent operation action number; Based on the equivalent operation information and the expected operation information of each component, the health index of each component is determined; the expected operation information is the expected operation time or the expected number of operation actions.

3. The method for evaluating the health of a hydraulic system according to claim 1, wherein: The operating parameter information associated with the first evaluation type includes the accumulated operating time of the vehicle; The determining of equivalent operating information for each component of the health assessment type based on the operating parameter information includes: For the component of the first evaluation type, the equivalent operating time of the component is determined based on the vehicle cumulative operating time and a first equivalent time coefficient.

4. The method for evaluating the health of a hydraulic system according to claim 1, wherein: The operating parameter information associated with the second evaluation type includes an operating condition of a drive unit of the hydraulic system; The determining of equivalent operating information for each component of the health assessment type based on the operating parameter information includes: For the components of the second evaluation type, determining the cumulative operating time of the drive unit that meets various operating conditions based on the operating conditions of the drive unit; The accumulated operating time of the drive unit is superimposed according to the equivalent time coefficient corresponding to each of the operating conditions to determine the equivalent operating time of the component.

5. The method for evaluating the health of a hydraulic system according to claim 1, wherein: The operating parameter information associated with the third evaluation type includes change parameter information of a control current, the control current being used to control the component of the third evaluation type; The determining of equivalent operating information for each component of the health assessment type based on the operating parameter information includes: For the components of the third evaluation type, the change parameter information of the control current is converted into the number of operating actions, and the numbers are accumulated to obtain the equivalent number of operating actions.

6. The method for evaluating the health of a hydraulic system according to any one of claims 1 to 5, characterized in that: Determining the health of the hydraulic system based on the health indicators of the components and the functional evaluation indicators of the hydraulic system includes: Based on the first weight of each component and the second weight of the functional evaluation index, the health index of each component and the functional evaluation index of the hydraulic system are weighted to obtain the health of the hydraulic system.

7. The method for evaluating the health of a hydraulic system according to claim 6, wherein: The first weight represents the importance of the component in the hydraulic system, and the first weight is calculated based on the severity and failure frequency of the failure type of the component.

8. A device for evaluating the health of a hydraulic system, characterized in that: The device comprises: A first determination module is configured to determine a health assessment type of a component in a hydraulic system of a vehicle based on its component type, maintenance information, and failure mode; the maintenance information indicates whether the component is a maintenance-free component; the health assessment types include a first assessment type, a second assessment type, and a third assessment type; the first assessment type indicates a type of failure proportional to a first operating time; the first operating time is the cumulative operating time of the vehicle; the second assessment type indicates a type of failure proportional to a second operating time; the second operating time is the cumulative operating time during which the vehicle meets a preset operating condition; the third assessment type indicates a type of failure proportional to a cumulative number of times the component performs a preset action; a second determining module, configured to determine, for each component of the health assessment type, a health index of the component based on operating parameter information of the component, wherein the operating parameter information is associated with the health assessment type; The third determination module is used to determine the health of the hydraulic system according to the health index of each of the components and the functional evaluation index of the hydraulic system.

9. The hydraulic system health assessment device according to claim 8, characterized in that: The second determining module is specifically configured to: For each component of the health assessment type, determining equivalent operation information based on the operation parameter information; the equivalent operation information is equivalent operation time or equivalent operation action number; Based on the equivalent operation information and the expected operation information of each component, the health index of each component is determined; the expected operation information is the expected operation time or the expected number of operation actions.

10. A vehicle, characterized in that: include: processor; a memory for storing instructions executable by the processor; The processor is configured to execute the instructions to implement the health assessment method of the hydraulic system according to any one of claims 1 to 7.

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