Method, system and electronic device for judging hydraulic unit wire harness plug-in state

Abstract

This application provides a method, system, and electronic device for determining the connection status of hydraulic unit wiring harnesses, relating to the field of vehicle technology. The determination method includes a self-correction stage for the connection of the swashplate tilt solenoid valve wiring harness and a self-correction stage for the connection of the high and low pressure side pressure sensor wiring harnesses. The self-correction stage for the high and low pressure side pressure sensor wiring harnesses includes: acquiring the current gear and current gear ratio of the transmission; determining the theoretical torque that the hydraulic unit can withstand based on the current gear and current gear ratio; controlling the low-pressure sensor to acquire the pressure at the low-pressure oil inlet and controlling the high-pressure sensor to acquire the pressure at the high-pressure oil outlet; determining the calculated torque that the hydraulic unit can withstand based on the pressure at the low-pressure oil inlet and the pressure at the high-pressure oil outlet; and determining the connection status of the high and low pressure side sensor wiring harnesses of the hydraulic unit based on the calculated torque and the theoretical torque. This method can promptly detect connection errors in the high and low pressure side wiring harnesses of the hydraulic unit.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and more specifically to a method, system, and electronic device for determining the connection status of hydraulic unit wiring harnesses. Background Technology

[0002] Hydraulic mechanical continuously variable transmissions (HMCVTs) rely on hydraulic units to achieve continuously variable speeds. The pressure difference between the high and low pressure sides of the hydraulic unit effectively calculates the actual load on the traveling mechanism. However, during actual component assembly, since the hardware on the high and low pressure sides is not significantly different, wiring errors are easily made, leading to incorrect connection of sensors on both sides and affecting the determination of the actual torque direction. Current technologies often rely on technicians to differentiate wiring harnesses by length, color, and labels, and clearly indicate the connection positions in the assembly manual. This method is overly dependent on the subjective judgment of technicians, resulting in a high error rate. Incorrect torque direction can affect transmission shifting and other controls. Furthermore, to ensure the working environment of the hydraulic unit, components such as sensors and solenoid valves are installed inside the transmission housing, making it impossible to detect wiring errors in a timely manner and thus impossible to adjust incorrectly connected harnesses. Summary of the Invention

[0003] This application provides a method, system, and electronic device for determining the plug-in status of a hydraulic unit wiring harness, in order to at least solve the technical problems existing in the related art.

[0004] According to one aspect of the embodiments of this application, a method for determining the connection status of a hydraulic unit wiring harness is provided. The hydraulic unit includes a hydraulic pump swashplate tilt solenoid valve, a low-pressure sensor disposed at the low-pressure suction port, and a high-pressure sensor disposed at the high-pressure outlet port. The method for determining the connection status of the wiring harness includes a swashplate tilt solenoid valve wiring harness connection determination stage and a high / low pressure side pressure sensor wiring harness connection determination stage. The high / low pressure side pressure sensor wiring harness connection determination stage includes: acquiring the current gear and current speed ratio of the transmission; determining the theoretical torque that the hydraulic unit can withstand based on the current gear and the current speed ratio; controlling the low-pressure sensor to acquire the pressure at the low-pressure suction port, and controlling the high-pressure sensor to acquire the pressure at the high-pressure outlet port; determining the calculated torque that the hydraulic unit can withstand based on the pressure at the low-pressure suction port and the pressure at the high-pressure outlet port; and determining the connection status of the high / low pressure side sensor wiring harnesses of the hydraulic unit based on the calculated torque and the theoretical torque.

[0005] Optionally, the swashplate tilt solenoid valve wiring harness connection determination stage includes: acquiring an output signal to characterize vehicle power-on; controlling the transmission to be in neutral and driving the swashplate tilt solenoid valve; acquiring the required swashplate tilt angle; determining the theoretically calculated direction of the hydraulic pump output shaft based on the required swashplate tilt angle; acquiring the actual direction of the hydraulic pump output shaft; and determining the connection status of the swashplate tilt solenoid valve wiring harness based on the theoretically calculated direction and the actual direction of the hydraulic pump output shaft.

[0006] Optionally, the high and low pressure side pressure sensor harness connection judgment stage further includes: judging whether the direction of the calculated bearing torque is consistent with the direction of the theoretical bearing torque; if the direction of the calculated bearing torque is inconsistent with the direction of the theoretical bearing torque, setting the current output signal of the low pressure sensor as the standard output signal of the high pressure sensor, and setting the current output signal of the high pressure sensor as the standard output signal of the low pressure sensor.

[0007] Optionally, the high and low pressure side pressure sensor harness connection judgment stage further includes: determining the current torque borne by the hydraulic unit based on the standard output signal of the high pressure sensor and the standard output signal of the low pressure sensor; determining whether the direction of the current torque borne is consistent with the theoretical torque borne; if the direction of the current torque borne is inconsistent with the theoretical torque borne; setting the current output signal of the low pressure sensor as the standard output signal of the low pressure sensor, and setting the current output signal of the high pressure sensor as the standard output signal of the high pressure sensor; and controlling the hydraulic unit to output a pressure sensor fault signal.

[0008] Optionally, the swashplate tilt solenoid valve wiring harness connection judgment stage further includes: judging whether the theoretical calculated direction of the hydraulic pump output shaft is consistent with the actual direction of the hydraulic pump output shaft; if the theoretical calculated direction of the hydraulic pump output shaft is inconsistent with the actual direction of the hydraulic pump output shaft, controlling the swashplate tilt solenoid valve to perform self-adjustment.

[0009] Optionally, the swashplate tilt angle solenoid valve wiring harness connection judgment stage further includes: if the theoretically calculated direction of the hydraulic pump output shaft is consistent with the actual direction of the hydraulic pump output shaft, determining whether the theoretically calculated speed of the hydraulic pump output shaft is consistent with the actual speed of the hydraulic pump output shaft; if the theoretically calculated speed of the hydraulic pump output shaft is inconsistent with the actual speed of the hydraulic pump output shaft, controlling the hydraulic unit to output a hydraulic pump fault signal.

[0010] Optionally, after controlling the swashplate tilt solenoid valve to self-adjust if the theoretically calculated direction of the hydraulic pump output shaft is inconsistent with the actual direction of the hydraulic pump output shaft, the method further includes: determining whether the theoretically calculated direction of the hydraulic pump output shaft is consistent with the self-adjustment direction of the hydraulic pump output shaft; if the theoretically calculated direction of the hydraulic pump output shaft is inconsistent with the self-adjustment direction of the hydraulic pump output shaft; and controlling the hydraulic unit to output a hydraulic pump fault signal.

[0011] According to another aspect of the embodiments of this application, a self-correcting system for the plug-in state of a hydraulic unit wiring harness is also provided, comprising: a working condition acquisition module for acquiring the current gear and current speed ratio of the transmission; a theoretical bearing torque acquisition module for determining the theoretical bearing torque of the hydraulic unit based on the current gear and the current speed ratio; a pressure acquisition module for controlling the low-pressure sensor to acquire the pressure of the low-pressure oil inlet and controlling the high-pressure sensor to acquire the pressure of the high-pressure oil outlet; a calculated bearing torque acquisition module for determining the calculated bearing torque of the hydraulic unit based on the pressure of the low-pressure oil inlet and the pressure of the high-pressure oil outlet; and a plug-in state judgment module for determining the plug-in state of the high and low pressure side sensor wiring harnesses of the hydraulic unit based on the calculated bearing torque and the theoretical bearing torque.

[0012] According to another aspect of the embodiments of this application, an electronic device is provided, including a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus, the memory is used to store a computer program, and the processor is used to execute the steps of the method for determining the plugging status of the hydraulic unit wiring harness by running the computer program stored in the memory.

[0013] According to another aspect of the embodiments of this application, a computer-readable storage medium is provided, wherein the storage medium stores a computer program, wherein the computer program is configured to execute the steps of the method for determining the plugging status of the hydraulic unit wiring harness when running.

[0014] This application provides a method for determining the connection status of hydraulic unit wiring harnesses. The method includes a swashplate tilt solenoid valve wiring harness connection determination stage and a high / low pressure side pressure sensor wiring harness connection determination stage. The high / low pressure side pressure sensor wiring harness connection determination stage determines the calculated torque the hydraulic unit can withstand by comparing the pressure at the low-pressure suction port and the pressure at the high-pressure outlet. Based on the calculated torque and the theoretical torque, the connection status of the high / low pressure side sensor wiring harnesses is determined, allowing for the identification of wiring errors on the high / low pressure sides of the hydraulic unit. This solves the problem of existing technologies relying too heavily on the subjective judgment of technicians, resulting in a high error rate and an inability to promptly detect connection errors in the high / low pressure side wiring harnesses, thus hindering further adjustments to incorrectly connected harnesses. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic flowchart of an optional hydraulic unit wiring harness plugging status determination method according to an embodiment of this application;

[0018] Figure 2 This is a structural block diagram of an optional electronic device according to an embodiment of this application. Detailed Implementation

[0019] To enable those skilled in the art to better understand 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. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0020] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0021] In actual component assembly, since there is no significant difference between the high and low voltage side hardware, wiring errors are easily made, leading to incorrect connection of sensors on both sides and affecting the determination of the actual torque direction. Current technologies often rely on technicians to differentiate wire harnesses by length, color, and labeling, and to clearly indicate the connection positions in the assembly manual. This method is overly dependent on the subjective judgment of technicians, resulting in a high error rate. Incorrect torque direction can affect transmission shifting and other controls. Furthermore, to ensure the working environment of the hydraulic unit, components such as sensors and solenoid valves are installed inside the transmission housing, making it impossible to detect wiring errors in a timely manner and thus impossible to adjust incorrectly connected harnesses.

[0022] Therefore, this application proposes a method for determining the connection status of hydraulic unit wiring harnesses, which can solve the above-mentioned technical problems.

[0023] like Figure 1 As shown, this application provides a method for determining the connection status of a hydraulic unit wiring harness. The hydraulic unit includes a hydraulic pump swashplate tilt solenoid valve, a low-pressure sensor disposed at the low-pressure suction port, and a high-pressure sensor disposed at the high-pressure outlet port. The method for determining the connection status of the wiring harness includes a swashplate tilt solenoid valve wiring harness connection determination stage and a high- and low-pressure side pressure sensor wiring harness connection determination stage. The high- and low-pressure side pressure sensor wiring harness connection determination stage includes:

[0024] S1 obtains the current gear and current gear ratio of the transmission;

[0025] S2 determines the theoretical torque that the hydraulic unit can withstand based on the current gear and the current speed ratio;

[0026] S3 controls the low-pressure sensor to acquire the pressure at the low-pressure oil inlet and controls the high-pressure sensor to acquire the pressure at the high-pressure oil outlet;

[0027] S4 determines the torque that the hydraulic unit can withstand based on the pressure of the low-pressure oil inlet and the pressure of the high-pressure oil outlet;

[0028] S5 determines the connection status of the high and low pressure side sensor harnesses of the hydraulic unit based on the calculated bearing torque and the theoretical bearing torque.

[0029] The HMCVT transmission hydraulic unit consists of a fixed-displacement hydraulic motor and a variable-displacement hydraulic pump. By changing the swashplate angle of the hydraulic pump, the output speed can be continuously adjusted. Simultaneously, by detecting the pressure on the high and low pressure sides, the torque currently borne by the hydraulic unit can be effectively detected. The swashplate angle solenoid valve is the main actuator for adjusting the swashplate angle. By controlling the movement direction of the piston chamber through two solenoid valves, real-time continuous control of the swashplate angle can be achieved, thereby effectively controlling the transmission speed ratio.

[0030] Specifically, the calculated torque that the hydraulic unit can withstand is calculated using the pressure at the low-pressure oil inlet obtained by the low-pressure sensor and the pressure at the high-pressure oil outlet obtained by the high-pressure sensor. Simultaneously, the theoretical torque that the hydraulic unit can withstand is obtained based on the current gear and gear ratio of the transmission. The connection status of the high and low pressure side sensor harnesses of the hydraulic unit is determined based on the calculated and theoretical torques. This solves the problem of existing technologies relying too heavily on the subjective judgment of technicians, resulting in a high error rate and an inability to promptly detect connection errors in the high and low pressure side harnesses of the hydraulic unit, thus hindering further adjustments to incorrectly connected harnesses.

[0031] Furthermore, the theoretical torque that the hydraulic unit can withstand is determined based on the current gear and speed ratio. Specifically, this can be achieved by calculating the current engine output power and torque using the current speed and load rate, and then calculating the torque state transmitted to the hydraulic unit output using the current gearbox clutch state and hydraulic unit state. At the same time, the difference between the engine's required speed and the actual speed is observed. When the vehicle is operating under a heavy load, the actual engine speed is lowered due to the load. In this case, the required engine speed is greater than the actual engine speed, and the engine output torque is used to drive the load. When the vehicle is descending a long slope and the engine is in reverse, the actual engine speed is greater than the required engine speed. In this case, the engine output torque is used to maintain the current speed.

[0032] Optionally, the high and low pressure side pressure sensor harness connection judgment stage further includes: judging whether the direction of the calculated bearing torque is consistent with the direction of the theoretical bearing torque; if the direction of the calculated bearing torque is inconsistent with the direction of the theoretical bearing torque, setting the current output signal of the low pressure sensor as the standard output signal of the high pressure sensor, and setting the current output signal of the high pressure sensor as the standard output signal of the low pressure sensor.

[0033] Understandably, if the calculated torque is in the same direction as the theoretical torque, it proves that the sensor wiring harness is correctly connected; if the calculated torque is in the opposite direction, it proves that the wiring harnesses of the high-pressure sensor and the low-pressure sensor are incorrectly connected, and the pressures collected by the high-pressure sensor and the low-pressure sensor need to be swapped. The above steps enable the correction of incorrect wiring harness connections when they are detected.

[0034] Optionally, the high and low pressure side pressure sensor harness connection judgment stage further includes: determining the current torque borne by the hydraulic unit based on the standard output signal of the high pressure sensor and the standard output signal of the low pressure sensor; determining whether the direction of the current torque borne is consistent with the theoretical torque borne; if the direction of the current torque borne is inconsistent with the theoretical torque borne; setting the current output signal of the low pressure sensor as the standard output signal of the low pressure sensor, and setting the current output signal of the high pressure sensor as the standard output signal of the high pressure sensor; and controlling the hydraulic unit to output a pressure sensor fault signal.

[0035] Specifically, the current torque that the hydraulic unit can withstand is calculated using the swapped high and low pressure sensors, and compared with the theoretical torque that the hydraulic unit can withstand calculated using the engine and transmission status. If the two torque directions are consistent, it indicates that the wiring harness of the high and low pressure sensors was previously connected incorrectly. If the output signals of the high-pressure sensor and the low-pressure sensor are still inconsistent after swapping, the current transmission status is maintained, and a fault is reported to remind technicians to conduct further troubleshooting.

[0036] Optionally, the swashplate tilt solenoid valve wiring harness connection determination stage includes: acquiring an output signal to characterize vehicle power-on; controlling the transmission to be in neutral and driving the swashplate tilt solenoid valve; acquiring the required swashplate tilt angle; determining the theoretically calculated direction of the hydraulic pump output shaft based on the required swashplate tilt angle; acquiring the actual direction of the hydraulic pump output shaft; and determining the connection status of the swashplate tilt solenoid valve wiring harness based on the theoretically calculated direction and the actual direction of the hydraulic pump output shaft.

[0037] Specifically, when the transmission is powered on, the transmission is controlled to be in neutral, and a small control current is applied to the swashplate angle solenoid valve of the hydraulic pump. Based on the required swashplate angle, the theoretical direction of the output shaft is calculated, and the actual direction of the hydraulic pump output shaft is obtained. The actual direction of the hydraulic pump output shaft can be obtained through a speed sensor; this application does not limit this method. Then, the connection status of the swashplate angle solenoid valve wiring harness is determined based on the theoretical and actual directions of the hydraulic pump output shaft. This solves the problem in existing technologies where incorrect connection of the swashplate angle solenoid valve wiring harness cannot be detected, thus preventing further adjustment of incorrectly connected harnesses.

[0038] Optionally, the swashplate tilt solenoid valve wiring harness connection judgment stage further includes: judging whether the theoretical calculated direction of the hydraulic pump output shaft is consistent with the actual direction of the hydraulic pump output shaft; if the theoretical calculated direction of the hydraulic pump output shaft is inconsistent with the actual direction of the hydraulic pump output shaft, controlling the swashplate tilt solenoid valve to perform self-adjustment.

[0039] Compare the theoretical output shaft speed direction with the actual output shaft speed direction. If the theoretical speed direction is consistent with the actual acquired direction, it proves that the hydraulic pump swashplate tilt solenoid valve wiring harness is correctly connected. If the required speed direction is opposite, it proves that the two hydraulic pump swashplate tilt solenoid valve wiring harnesses are incorrectly connected. In this case, control the swashplate tilt solenoid valve to self-adjust. Specifically, the drive current of the solenoid valve can be reversed.

[0040] Optionally, the swashplate tilt angle solenoid valve wiring harness connection judgment stage further includes: if the theoretically calculated direction of the hydraulic pump output shaft is consistent with the actual direction of the hydraulic pump output shaft, determining whether the theoretically calculated speed of the hydraulic pump output shaft is consistent with the actual speed of the hydraulic pump output shaft; if the theoretically calculated speed of the hydraulic pump output shaft is inconsistent with the actual speed of the hydraulic pump output shaft, controlling the hydraulic unit to output a hydraulic pump fault signal.

[0041] Specifically, if the rotational speeds are in the same direction but differ significantly in magnitude, it indicates that the current hydraulic unit cannot correctly execute the requirements. This situation may occur under the following circumstances: 1. The solenoid valve is faulty or its specifications are incorrect, preventing the correct adjustment of the hydraulic pump's swing angle. For example, if the required swing angle is 10°, the solenoid valve is only adjusted to 5°; 2. The hydraulic unit is leaking oil. If the hydraulic unit is leaking oil, it will directly affect the flow rate on both the high and low sides, thus affecting the rotational speed. Therefore, in this case, the hydraulic unit will output a hydraulic pump fault signal to alert technicians to troubleshoot the problem.

[0042] Optionally, after controlling the swashplate tilt solenoid valve to self-adjust if the theoretically calculated direction of the hydraulic pump output shaft is inconsistent with the actual direction of the hydraulic pump output shaft, the method further includes: determining whether the theoretically calculated direction of the hydraulic pump output shaft is consistent with the self-adjustment direction of the hydraulic pump output shaft; if the theoretically calculated direction of the hydraulic pump output shaft is inconsistent with the self-adjustment direction of the hydraulic pump output shaft; and controlling the hydraulic unit to output a hydraulic pump fault signal.

[0043] It is understandable that if the theoretically calculated direction of the hydraulic pump output shaft is inconsistent with the actual direction of the hydraulic pump output shaft, and the theoretically calculated direction of the hydraulic pump output shaft is still inconsistent with the self-adjustment direction of the hydraulic pump output shaft after the swashplate tilt solenoid valve is controlled to adjust, it indicates that the hydraulic pump may be faulty. At this time, the hydraulic unit is controlled to output a hydraulic pump fault signal.

[0044] According to another aspect of the embodiments of this application, a self-correcting system for the plug-in state of a hydraulic unit wiring harness is also provided, comprising:

[0045] The operating condition acquisition module is used to acquire the current gear and current speed ratio of the transmission;

[0046] The theoretical torque acquisition module is used to determine the theoretical torque that the hydraulic unit can withstand based on the current gear and the current speed ratio.

[0047] The pressure acquisition module is used to control the low-pressure sensor to acquire the pressure of the low-pressure oil inlet and to control the high-pressure sensor to acquire the pressure of the high-pressure oil outlet.

[0048] The torque calculation module is used to determine the hydraulic unit's torque capacity based on the pressure at the low-pressure oil inlet and the pressure at the high-pressure oil outlet.

[0049] The plug-in status determination module is used to determine the plug-in status of the high and low pressure side sensor harnesses of the hydraulic unit based on the calculated bearing torque and the theoretical bearing torque.

[0050] Figure 2 This is a structural block diagram of an optional electronic device according to an embodiment of this application, such as... Figure 2 As shown, it includes a processor 202, a communication interface 204, a memory 206, and a communication bus 208. The processor 202, communication interface 204, and memory 206 communicate with each other via the communication bus 208.

[0051] Memory 206 is used to store computer programs;

[0052] When processor 202 executes a computer program stored in memory 206, it performs the following steps:

[0053] Obtain the current gear and gear ratio of the transmission;

[0054] The theoretical torque that the hydraulic unit can withstand is determined based on the current gear and the current speed ratio.

[0055] The low-pressure sensor is controlled to acquire the pressure at the low-pressure oil inlet, and the high-pressure sensor is controlled to acquire the pressure at the high-pressure oil outlet.

[0056] The hydraulic unit is calculated to withstand torque based on the pressure at the low-pressure oil inlet and the pressure at the high-pressure oil outlet.

[0057] The connection status of the high and low pressure side sensor harnesses of the hydraulic unit is determined based on the calculated and theoretical torque.

[0058] According to another aspect of the embodiments of this application, an electronic device for determining the plugging status of a hydraulic unit wiring harness is also provided. The electronic device may be a server, a terminal, or a combination thereof.

[0059] Optionally, in this embodiment, the communication bus can be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. This communication bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 2 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0060] The communication interface is used for communication between the aforementioned electronic devices and other devices.

[0061] The memory may include RAM, or non-volatile memory, such as at least one disk storage device. Optionally, the memory may also be at least one storage device located remotely from the aforementioned processor.

[0062] Other module units in the self-correcting system for the hydraulic unit wiring harness plug-in state, including but not limited to those mentioned above, will not be described in detail in this example.

[0063] According to another aspect of the embodiments of this application, a storage medium is also provided. Optionally, in this embodiment, the storage medium can be used to execute program code for a method for determining the connection status of a hydraulic unit wiring harness.

[0064] Optionally, in this embodiment, the storage medium may be located on at least one of the network devices in the network shown in the above embodiment.

[0065] Optionally, in this embodiment, the storage medium is configured to store program code for performing the following steps:

[0066] Obtain the current gear and gear ratio of the transmission;

[0067] The theoretical torque that the hydraulic unit can withstand is determined based on the current gear and the current speed ratio.

[0068] The low-pressure sensor is controlled to acquire the pressure at the low-pressure oil inlet, and the high-pressure sensor is controlled to acquire the pressure at the high-pressure oil outlet.

[0069] The hydraulic unit is calculated to withstand torque based on the pressure at the low-pressure oil inlet and the pressure at the high-pressure oil outlet.

[0070] The connection status of the high and low pressure side sensor harnesses of the hydraulic unit is determined based on the calculated and theoretical torque.

[0071] Specific examples in this embodiment can be found in the examples described in the above embodiments, and will not be repeated here.

[0072] Optionally, in this embodiment, the storage medium may include, but is not limited to, various media capable of storing program code, such as USB flash drives, ROMs, RAMs, portable hard drives, magnetic disks, or optical disks.

[0073] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0074] If the integrated units in the above embodiments are implemented as software functional units and sold or used as independent products, they can be stored in the aforementioned computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause one or more electronic devices (which may be personal computers, servers, or network devices, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application.

[0075] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0076] In the several embodiments provided in this application, it should be understood that the disclosed client can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, indirect coupling or communication connection between units or modules, and may be electrical or other forms.

[0077] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of the solution provided in this embodiment, depending on actual needs.

[0078] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0079] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0080] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A method for determining the connection status of a hydraulic unit wiring harness, characterized in that, The hydraulic unit includes a hydraulic pump, a swashplate tilt angle solenoid valve, a low-pressure sensor located at the low-pressure suction port, and a high-pressure sensor located at the high-pressure outlet port; the method for determining the wiring harness connection status includes a swashplate tilt angle solenoid valve wiring harness connection determination stage and a high / low pressure side pressure sensor wiring harness connection determination stage; wherein the high / low pressure side pressure sensor wiring harness connection determination stage includes: Obtain the current gear and gear ratio of the transmission; The theoretical torque that the hydraulic unit can withstand is determined based on the current gear and the current speed ratio. The low-pressure sensor is controlled to acquire the pressure at the low-pressure oil inlet, and the high-pressure sensor is controlled to acquire the pressure at the high-pressure oil outlet. The hydraulic unit is calculated to withstand torque based on the pressure at the low-pressure oil inlet and the pressure at the high-pressure oil outlet. The connection status of the high and low pressure side sensor harnesses of the hydraulic unit is determined based on the calculated and theoretical torque.

2. The method for determining the connection status of the hydraulic unit wiring harness as described in claim 1, characterized in that, The swashplate tilt angle solenoid valve wiring harness connection judgment stage includes: Acquire the output signal used to characterize the vehicle's power-on; Control the gearbox to be in neutral and drive the swashplate tilt solenoid valve; Obtain the required swashplate angle; The theoretical calculation direction of the hydraulic pump output shaft is determined based on the required swashplate angle. Obtain the actual direction of the hydraulic pump output shaft; The connection status of the swashplate tilt angle solenoid valve harness is determined based on the theoretically calculated direction of the hydraulic pump output shaft and the actual direction of the hydraulic pump output shaft.

3. The method for determining the connection status of the hydraulic unit wiring harness as described in claim 1, characterized in that, The high and low pressure side pressure sensor harness connection determination stage also includes: Determine whether the calculated bearing torque is consistent with the theoretical bearing torque in direction; If the calculated bearing torque is not in the same direction as the theoretical bearing torque, the current output signal of the low-pressure sensor is set as the standard output signal of the high-pressure sensor, and the current output signal of the high-pressure sensor is set as the standard output signal of the low-pressure sensor.

4. The method for determining the connection status of the hydraulic unit wiring harness as described in claim 3, characterized in that, The high and low pressure side pressure sensor harness connection determination stage also includes: The current torque borne by the hydraulic unit is determined based on the standard output signal of the high-pressure sensor and the standard output signal of the low-pressure sensor. Determine whether the direction of the current bearing torque is consistent with the direction of the theoretical bearing torque; If the direction of the current bearing torque is not consistent with the direction of the theoretical bearing torque; Set the current output signal of the low-pressure sensor to the standard output signal of the low-pressure sensor, and set the current output signal of the high-pressure sensor to the standard output signal of the high-pressure sensor. The hydraulic unit is controlled to output a pressure sensor fault signal.

5. The method for determining the connection status of the hydraulic unit wiring harness as described in claim 2, characterized in that, The swashplate tilt angle solenoid valve wiring harness connection judgment stage also includes: Determine whether the theoretically calculated direction of the hydraulic pump output shaft is consistent with the actual direction of the hydraulic pump output shaft; If the theoretically calculated direction of the hydraulic pump output shaft is inconsistent with the actual direction of the hydraulic pump output shaft, the swashplate tilt angle solenoid valve is controlled to perform self-adjustment.

6. The method for determining the connection status of the hydraulic unit wiring harness as described in claim 5, characterized in that, The swashplate tilt angle solenoid valve wiring harness connection judgment stage also includes: If the theoretically calculated direction of the hydraulic pump output shaft is consistent with the actual direction of the hydraulic pump output shaft, determine whether the theoretically calculated speed of the hydraulic pump output shaft is consistent with the actual speed of the hydraulic pump output shaft. If the theoretically calculated speed of the hydraulic pump output shaft is inconsistent with the actual speed of the hydraulic pump output shaft, the hydraulic unit is controlled to output a hydraulic pump fault signal.

7. The method for determining the connection status of the hydraulic unit wiring harness as described in claim 5, characterized in that, If the theoretically calculated direction of the hydraulic pump output shaft is inconsistent with the actual direction of the hydraulic pump output shaft, after controlling the swashplate tilt solenoid valve to perform self-adjustment, the following steps are also included: Determine whether the theoretically calculated direction of the hydraulic pump output shaft is consistent with the self-adjusting direction of the hydraulic pump output shaft; If the theoretically calculated direction of the hydraulic pump output shaft is inconsistent with the self-adjusting direction of the hydraulic pump output shaft; The hydraulic unit is controlled to output a hydraulic pump fault signal.

8. A self-correcting system for the plug-in state of a hydraulic unit wiring harness, characterized in that, include: The operating condition acquisition module is used to acquire the current gear and current speed ratio of the transmission; The theoretical torque acquisition module is used to determine the theoretical torque that the hydraulic unit can withstand based on the current gear and the current speed ratio. The pressure acquisition module is used to control the low-pressure sensor to acquire the pressure at the low-pressure oil inlet and to control the high-pressure sensor to acquire the pressure at the high-pressure oil outlet. The torque calculation module is used to determine the hydraulic unit's torque capacity based on the pressure at the low-pressure oil inlet and the pressure at the high-pressure oil outlet. The plug-in status determination module is used to determine the plug-in status of the high and low pressure side sensor harnesses of the hydraulic unit based on the calculated bearing torque and the theoretical bearing torque.

9. An electronic device comprising a processor, a communication interface, a memory, and a communication bus, wherein, The processor, the communication interface, and the memory communicate with each other via the communication bus, characterized in that... The memory is used to store computer programs; The processor is configured to execute the steps of the method for determining the connection status of the hydraulic unit harness as described in any one of claims 1 to 7 by running the computer program stored in the memory.

10. A computer-readable storage medium, characterized in that, The storage medium stores a computer program, wherein the computer program is configured to execute the steps of the method for determining the plugging status of the hydraulic unit wiring harness as described in any one of claims 1 to 7 when it is run.

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