Method, device, processor and vehicle for testing a vehicle transmission

Abstract

The application discloses a kind of vehicle gearbox test method, device, processor and vehicle.The method comprises: obtaining the parameter simulation signal of the gearbox to be measured, wherein the parameter simulation signal is used to simulate at least under reference working condition, the ambient temperature and road slope of the road section where the vehicle is located;Parameter simulation signal is sent to the gearbox to be measured;Obtain the target working condition of the gearbox to be measured after responding to parameter simulation signal;Based on target working condition and reference working condition, determine the test result of the gearbox to be measured, wherein the test result is used to indicate whether the gearbox to be measured is switched from original working condition to reference working condition, and the original working condition is the working condition before the gearbox to be measured responds to parameter simulation signal.The present application solves the technical problem of low efficiency in testing the working condition of vehicle gearbox.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vehicles, and in particular, to a test method, device, processor and vehicle for a vehicle transmission. BACKGROUND

[0002] In the related art, the working conditions of a vehicle transmission are mainly tested through bench testing and real vehicle testing. However, this method is limited by the climate on the day of testing and the road section selected for testing, and therefore can only be used for random testing, which is difficult to cover all working conditions of the vehicle transmission, thereby resulting in the technical problem of low efficiency in testing the working conditions of the vehicle transmission.

[0003] In view of the above technical problem of low efficiency in testing the working conditions of the vehicle transmission, no effective solution has been proposed so far. SUMMARY

[0004] The embodiments of the present application provide a test method, device, processor and vehicle for a vehicle transmission, to at least solve the technical problem that the function of the vehicle transmission cannot be tested.

[0005] According to an aspect of the embodiments of the present application, a test method for a vehicle transmission is provided. The test method can include: obtaining a parameter simulation signal of a to-be-tested transmission, wherein the parameter simulation signal is used to simulate at least an ambient temperature and a road slope of a road section on which a vehicle is located under a reference working condition; sending the parameter simulation signal to the to-be-tested transmission; obtaining a target working condition of the to-be-tested transmission after the to-be-tested transmission responds to the parameter simulation signal; and determining a test result of the to-be-tested transmission based on the target working condition and the reference working condition, wherein the test result is used to represent whether the to-be-tested transmission is switched from an original working condition to the reference working condition, and the original working condition is a working condition of the to-be-tested transmission before the to-be-tested transmission responds to the parameter simulation signal.

[0006] Optionally, the reference working condition at least includes a heating working condition and a driving working condition.

[0007] Optionally, the test method for the vehicle transmission further includes: in a case where the reference working condition is the heating working condition, the parameter simulation signal is used to simulate that the ambient temperature is a reference temperature, wherein the reference temperature is less than a temperature threshold, and the temperature threshold is a temperature threshold value at which the vehicle controls the to-be-tested transmission to enter the heating working condition.

[0008] Optionally, the test method of the vehicle transmission further comprises: in the case that the reference working condition is a driving working condition, the parameter simulation signal is used to simulate that a road slope is a reference slope, an opening and closing degree of an accelerator pedal of the vehicle is a reference opening and closing degree, and / or an altitude of a road section is a reference altitude, wherein the reference slope is a slope threshold value for the vehicle to control the transmission under test to enter the driving working condition, the reference opening and closing degree is an opening and closing degree threshold value for the vehicle to control the transmission under test to enter the driving working condition, and the reference altitude is an altitude threshold value for the vehicle to control the transmission under test to enter the driving working condition.

[0009] Optionally, the test result of the transmission under test is determined based on the target working condition and the reference working condition, comprising: in response to the target working condition being the same as the reference working condition, it is determined that the transmission under test is switched from an original working condition to the reference working condition; and in response to the target working condition being different from the reference working condition, it is determined that the transmission under test is not switched from the original working condition to the reference working condition.

[0010] Optionally, the parameter simulation signal is sent to the transmission under test, comprising: obtaining state information of the transmission under test, wherein the state information is used to represent whether the transmission under test is in a fault state; and in response to the transmission under test not being in the fault state, the parameter simulation signal is sent to the transmission under test.

[0011] According to an aspect of an embodiment of the present application, a test device of a vehicle transmission is provided, which can comprise: a first obtaining unit configured to obtain a parameter simulation signal of a transmission under test, wherein the parameter simulation signal is used to simulate at least an ambient temperature and a road slope of a road section on which a vehicle is located in a reference working condition; a sending unit configured to send the parameter simulation signal to the transmission under test; a second obtaining unit configured to obtain a target working condition of the transmission under test after the transmission under test responds to the parameter simulation signal; and a determining unit configured to determine a test result of the transmission under test based on the target working condition and the reference working condition, wherein the test result is used to represent whether the transmission under test is switched from an original working condition to the reference working condition, and the original working condition is a working condition of the transmission under test before the transmission under test responds to the parameter simulation signal.

[0012] According to another aspect of an embodiment of the present application, a computer readable storage medium is further provided. The computer readable storage medium comprises a stored program, wherein the program, when executed, controls a device in which the computer readable storage medium is located to perform the test method of the vehicle transmission according to an embodiment of the present application.

[0013] According to another aspect of an embodiment of the present application, a processor is further provided. The processor is configured to execute a program, wherein the program, when executed by the processor, performs the test method of the vehicle transmission according to an embodiment of the present application.

[0014] According to another aspect of an embodiment of the present application, a vehicle is further provided, which is configured to perform the test method of the vehicle transmission according to an embodiment of the present application.

[0015] In the embodiment of the present application, a parameter simulation signal of the to-be-tested gearbox is acquired, wherein the parameter simulation signal is used to simulate at least an ambient temperature and a road slope of a road section where the vehicle is located under a reference working condition; the parameter simulation signal is sent to the to-be-tested gearbox; a target working condition of the to-be-tested gearbox after the to-be-tested gearbox responds to the parameter simulation signal is acquired; and a test result of the to-be-tested gearbox is determined based on the target working condition and the reference working condition, wherein the test result is used to represent whether the to-be-tested gearbox is switched from an original working condition to the reference working condition, the original working condition being a working condition of the to-be-tested gearbox before the to-be-tested gearbox responds to the parameter simulation signal. That is, in the embodiment of the present application, the parameter simulation signal of the to-be-tested gearbox is first acquired to simulate the ambient temperature and the road slope of the road section where the vehicle is currently located, then the acquired parameter simulation signal is sent to the to-be-tested gearbox, the target working condition of the to-be-tested gearbox after the to-be-tested gearbox responds to the received parameter simulation signal is acquired, and finally the target working condition of the to-be-tested gearbox is compared with the reference working condition to determine whether the to-be-tested gearbox is switched from the original working condition to the reference working condition after the to-be-tested gearbox receives the parameter simulation signal, so that the purpose of covering all working conditions when the gearbox of the vehicle is tested is achieved, and the technical problem of low efficiency of testing the working condition of the gearbox of the vehicle is solved, and the technical effect of improving the efficiency of testing the working condition of the gearbox of the vehicle is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which are included to provide a further understanding of the present application and constitute a part of this application, illustrate certain illustrative embodiments of the present application and together with the description serve to explain the present application. In the drawings:

[0017] Figure 1 FIG. 1 is a flowchart of a testing method of a gearbox of a vehicle according to an embodiment of the present application;

[0018] Figure 2 FIG. 4 is a schematic diagram of a controller communication architecture according to an embodiment of the present application;

[0019] Figure 3 FIG. 5 is a schematic diagram of a hardware-in-the-loop testing system according to an embodiment of the present application;

[0020] Figure 4 FIG. 6 is a schematic diagram of a testing device of a gearbox of a vehicle according to an embodiment of the present application. DETAILED DESCRIPTION

[0021] In the following, the technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, so that those skilled in the art can better understand the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work should fall within the protection scope of the present application.

[0022] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0023] Embodiment 1

[0024] According to the embodiments of the present application, a test method of a vehicle transmission is provided. It should be noted that the steps shown in the flowchart of the drawings can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described herein can be executed in an order different from that shown herein.

[0025] Figure 1 is a flowchart of a test method of a vehicle transmission according to the embodiments of the present application, as shown in Figure 1 The method can include the following steps:

[0026] Step S101, obtaining a parameter simulation signal of the transmission to be tested, wherein the parameter simulation signal is used to simulate at least the ambient temperature and the road slope of the road section where the vehicle is located under the reference working condition.

[0027] In the technical solution provided in the step S101 of the present application, the parameter simulation signal of the gearbox under test can be generated by the hardware-in-the-loop tool and the simulation test software, wherein the parameter simulation signal can be used to simulate at least the ambient temperature and the road slope of the road section where the vehicle is located under the reference working condition, and the parameter simulation signal can include a simulation mode selection signal, a simulation electronic gear shifter signal, a simulation engine water temperature signal, a simulation gearbox oil temperature signal, a simulation slope signal, a simulation accelerator pedal opening degree signal, a simulation air pressure signal, a simulation gear signal, a simulation vehicle speed signal, a simulation wheel speed difference signal, a simulation throttle signal, etc., which are only used for illustration and are not limited in particular.

[0028] Optionally, the reference working condition can be a working condition in which the vehicle gearbox should be under the change of the ambient temperature, the road slope, etc., and the ambient temperature of the road section where the vehicle is located can include the engine water temperature and the gearbox oil temperature.

[0029] For example, in order to make the vehicle enter the uphill mode, the parameter simulation signal can be that the simulated engine water temperature of the road section where the vehicle is located is greater than 72℃, the simulated gearbox oil temperature is greater than 42℃, the simulated road slope is greater than 5°, and the simulated accelerator pedal opening degree is greater than 0°, which are only used for illustration and are not limited in particular.

[0030] In step S102, the parameter simulation signal is sent to the gearbox under test.

[0031] In the technical solution provided in the step S102 of the present application, after the parameter simulation signal of the gearbox under test is generated by the hardware-in-the-loop tool and the simulation test software, the parameter simulation signal can be sent to the gearbox under test, and the gearbox under test can respond to the received parameter simulation signal.

[0032] In step S103, the target working condition of the gearbox under test after responding to the parameter simulation signal is acquired.

[0033] In the technical solution provided in the step S103 of the present application, after the parameter simulation signal is sent to the gearbox under test, the gearbox under test can respond to the received parameter simulation signal, and determine the target working condition of the gearbox under test after responding to the received parameter simulation signal, wherein the target working condition can be used to represent the working mode to which the gearbox under test switches after responding to the parameter simulation signal, such as entering the manual gear shifting mode, exiting the manual gear shifting mode, entering the cold mode, exiting the cold mode, entering the uphill mode, exiting the uphill mode, entering the downhill mode, exiting the downhill mode, entering the plateau mode, exiting the plateau mode, entering the turning mode, exiting the turning mode, etc., which are only used for illustration and are not limited in particular.

[0034] In step S104, a test result of the to-be-tested gearbox is determined based on the target working condition and the reference working condition, wherein the test result is used to represent whether the to-be-tested gearbox is switched from the original working condition to the reference working condition, and the original working condition is a working condition before the to-be-tested gearbox responds to the parameter simulation signal.

[0035] In the technical solution provided in step S104, after the target working condition in which the to-be-tested gearbox responds to the parameter simulation signal is obtained, the target working condition of the to-be-tested gearbox is compared with the reference working condition, so as to determine whether the to-be-tested gearbox is switched from the original working condition to the reference working condition, and the original working condition can be a working condition before the to-be-tested gearbox responds to the parameter simulation signal.

[0036] Optionally, before the target working condition is compared with the reference working condition, the target working condition can be subjected to redundancy processing, that is, contents of the target working condition indicating redundant information are deleted, and only valid contents representing the current working condition are reserved, and then the target working condition subjected to the redundancy processing is compared with the reference working condition, and whether the to-be-tested gearbox is switched from the original working condition to the reference working condition is determined based on the comparison result, so that the technical effect of improving the test efficiency of the working condition of the vehicle gearbox is achieved.

[0037] In the above steps S101 to S104, the parameter simulation signal of the to-be-tested gearbox is obtained, wherein the parameter simulation signal is used to simulate at least an ambient temperature and a road slope of a road section in which the vehicle is located in the reference working condition; the parameter simulation signal is sent to the to-be-tested gearbox; a target working condition in which the to-be-tested gearbox is located after responding to the parameter simulation signal is obtained; and a test result of the to-be-tested gearbox is determined based on the target working condition and the reference working condition, wherein the test result is used to represent whether the to-be-tested gearbox is switched from an original working condition to the reference working condition, and the original working condition is a working condition before the to-be-tested gearbox responds to the parameter simulation signal. That is, in the embodiment, the parameter simulation signal of the to-be-tested gearbox is first obtained to simulate the ambient temperature and the road slope of the road section in which the vehicle is currently located, and then the obtained parameter simulation signal is sent to the to-be-tested gearbox, a target working condition in which the to-be-tested gearbox is located after responding to the received parameter simulation signal is obtained, and finally the target working condition of the to-be-tested gearbox is compared with the reference working condition, so as to determine whether the to-be-tested gearbox is switched from the original working condition to the reference working condition after receiving the parameter simulation signal, so that the purpose of covering all working conditions when the vehicle gearbox is detected is achieved, and the technical problem of low efficiency of testing the working condition of the vehicle gearbox is solved, and the technical effect of improving the efficiency of testing the working condition of the vehicle gearbox is achieved.

[0038] The above method of the embodiment is further introduced as follows.

[0039] As an optional embodiment, the reference working condition at least includes: a heating working condition and a driving working condition.

[0040] In this embodiment, the reference working condition can include: a heating working condition and a driving working condition, wherein the heating working condition can be that the vehicle enters a cold mode or the vehicle exits the cold mode; the driving working condition can be that the vehicle switches to a different driving mode, for example, the vehicle enters a manual shift mode, the vehicle exits the manual shift mode, the vehicle enters an uphill mode, the vehicle exits the uphill mode, the vehicle enters a downhill mode, the vehicle exits the downhill mode, the vehicle enters a plateau mode, the vehicle exits the plateau mode, the vehicle enters a turning mode, or the vehicle exits the turning mode, which are only exemplified and not limited.

[0041] As an optional embodiment, the test method of the vehicle transmission further includes: in the case that the reference working condition is the heating working condition, the parameter simulation signal is used to simulate that the environment temperature is a reference temperature, wherein the reference temperature is less than a temperature threshold, and the temperature threshold is a temperature threshold value for the vehicle to control the test transmission to enter the heating working condition.

[0042] In this embodiment, different parameter simulation signals can be used to simulate different influencing factors such as environment temperature and road slope under different reference working conditions to test different working conditions of the test transmission, in the case that the reference working condition is the heating working condition, the parameter simulation signal generated by the hardware-in-the-loop tool and the simulation test software can be used to simulate the required oil temperature and the required water temperature of the heating working condition, that is, to simulate that the environment temperature is a reference temperature, and then to detect the target working condition in which the test transmission is currently located to determine whether the test transmission enters the heating working condition from the original working condition, wherein the reference temperature can be less than the temperature threshold, and the temperature threshold can be a temperature threshold value for the vehicle to control the test transmission to enter the heating working condition.

[0043] Optionally, the reference temperature can include: a reference engine water temperature and a reference transmission oil temperature, and the reference engine water temperature and the reference transmission oil temperature each need to be less than a corresponding temperature threshold, and the temperature threshold can be a temperature threshold value for the vehicle to control the test transmission to enter the heating working condition.

[0044] Optionally, the temperature threshold can be obtained based on the following steps: making the vehicle enter a cold mode from an original mode, and constantly modifying a given engine water temperature signal and a transmission oil temperature signal by using the hardware-in-the-loop tool and the simulation test software until the transmission control unit no longer responds, at which time the water temperature threshold value and the oil temperature threshold value for the vehicle to control the test transmission to enter the heating working condition can be obtained, that is, the water temperature and the oil temperature corresponding to the activation of the cold mode can be obtained.

[0045] As an optional embodiment, the test method of the vehicle transmission further comprises: in the case that the reference working condition is the driving working condition, the parameter simulation signal is used to simulate that the road slope is a reference slope, the opening and closing degree of the vehicle accelerator pedal is a reference opening and closing degree, and / or the altitude of the road section is a reference altitude, wherein the reference slope is a slope threshold value for the vehicle to control the tested transmission to enter the driving working condition, the reference opening and closing degree is an opening and closing degree threshold value for the vehicle to control the tested transmission to enter the driving working condition, and the reference altitude is an altitude threshold value for the vehicle to control the tested transmission to enter the driving working condition.

[0046] In this embodiment, in the case that the reference working condition is the driving working condition, the parameter simulation signal generated by the hardware-in-the-loop tool and the simulation test software can be used to simulate the road slope in which the vehicle is located, the opening and closing degree of the vehicle accelerator pedal, and / or the altitude of the road section in which the vehicle is located under different driving working conditions, i.e. the road slope is simulated to be a reference slope, the opening and closing degree of the vehicle accelerator pedal is simulated to be a reference opening and closing degree, and / or the altitude of the road section is simulated to be a reference altitude, and then the target working condition in which the tested transmission is currently located is detected to determine whether the tested transmission is switched from the original working condition to the driving working condition, wherein the reference slope can be a slope threshold value for the vehicle to control the tested transmission to enter the driving working condition, the reference opening and closing degree can be an opening and closing degree threshold value for the vehicle to control the tested transmission to enter the driving working condition, and the reference altitude can be an altitude threshold value for the vehicle to control the tested transmission to enter the driving working condition.

[0047] Optionally, in the case that the reference working condition is the driving working condition, if it is required to make the vehicle enter the uphill mode, a parameter simulation signal corresponding to the uphill mode is generated, so as to simulate that the road slope is a reference slope corresponding to the uphill mode, the opening and closing degree of the vehicle accelerator pedal is a reference opening and closing degree corresponding to the uphill mode, and then the target working condition in which the tested transmission is currently located is detected to determine whether the tested transmission is switched from the original working condition to the driving working condition, i.e. whether the vehicle enters the uphill mode, wherein the reference slope can be obtained based on the following steps: making the vehicle enter the uphill mode from the original mode, constantly modifying a given slope signal by the hardware-in-the-loop tool and the simulation test software until the uphill mode cannot be entered, and at this time, the slope threshold value for the vehicle to control the tested transmission to enter the driving working condition can be obtained, i.e. the reference slope for activating the uphill mode can be obtained; the reference opening and closing degree can be obtained based on the following steps: making the vehicle enter the uphill mode from the original mode, constantly modifying a given opening and closing degree signal by the hardware-in-the-loop tool and the simulation test software until the uphill mode cannot be entered, and at this time, the opening and closing degree threshold value for the vehicle to control the tested transmission to enter the uphill mode can be obtained, i.e. the reference opening and closing degree for activating the uphill mode can be obtained.

[0048] Optionally, in the case that the reference working condition is the driving working condition, if it is required to make the vehicle enter the downhill mode, a parameter simulation signal corresponding to the downhill mode is generated, so as to simulate that the road slope is a reference slope corresponding to the downhill mode, and the opening and closing degree of the vehicle accelerator pedal is a reference opening and closing degree corresponding to the downhill mode, and then the target working condition currently taken by the tested transmission is detected to determine whether the tested transmission is switched from the original working condition to the driving working condition, that is, whether the vehicle enters the downhill mode, wherein the reference slope can be obtained based on the following steps: making the vehicle enter the downhill mode from the original mode, constantly modifying a given slope signal by using the hardware-in-the-loop tool and the simulation test software until the vehicle cannot enter the downhill mode, and then obtaining the slope critical value for the vehicle to control the tested transmission to enter the driving working condition, that is, obtaining the reference slope for activating the downhill mode; the reference opening and closing degree can be obtained based on the following steps: making the vehicle enter the downhill mode from the original mode, constantly modifying a given opening and closing degree signal by using the hardware-in-the-loop tool and the simulation test software until the vehicle cannot enter the downhill mode, and then obtaining the opening and closing degree critical value for the vehicle to control the tested transmission to enter the downhill mode, that is, obtaining the reference opening and closing degree for activating the downhill mode.

[0049] Optionally, in the case that the reference working condition is the driving working condition, if it is required to make the vehicle enter the plateau mode, a parameter simulation signal corresponding to the plateau mode is generated, so as to simulate that the altitude of the road section is a reference altitude, and then the target working condition currently taken by the tested transmission is detected to determine whether the tested transmission is switched from the original working condition to the driving working condition, that is, whether the vehicle enters the plateau mode, wherein the reference altitude can be obtained based on the following steps: making the vehicle enter the plateau mode from the original mode, constantly modifying a given air pressure signal by using the hardware-in-the-loop tool and the simulation test software until the vehicle cannot enter the plateau mode, and then obtaining the altitude critical value for the vehicle to control the tested transmission to enter the plateau mode, that is, obtaining the reference altitude for activating the plateau mode.

[0050] As an optional embodiment, in step S104, the test result of the tested transmission is determined based on the target working condition and the reference working condition, including: in response to the target working condition and the reference working condition being the same working condition, it is determined that the tested transmission is switched from the original working condition to the reference working condition; and in response to the target working condition and the reference working condition being different working conditions, it is determined that the tested transmission is not switched from the original working condition to the reference working condition.

[0051] In this embodiment, after obtaining the target working condition of the to-be-tested gearbox response parameter simulation signal, the obtained target working condition is compared with the reference working condition. If the target working condition and the reference working condition are the same working condition, it is determined that the test result of the to-be-tested gearbox is that, after the to-be-tested gearbox response parameter simulation signal, the to-be-tested gearbox is switched from the original working condition to the reference working condition, thereby indicating that the to-be-tested gearbox can normally respond to the current influencing factor to enter the corresponding working condition. If the target working condition and the reference working condition are different working conditions, it is determined that the test result of the to-be-tested gearbox is that, after the to-be-tested gearbox response parameter simulation signal, the to-be-tested gearbox is not switched from the original working condition to the reference working condition, thereby indicating that the to-be-tested gearbox cannot normally respond to the current influencing factor to enter the corresponding working condition.

[0052] For example, when the working condition of the to-be-tested gearbox entering the downhill mode is tested, the vehicle speed of the road section where the vehicle is located is simulated to be greater than 40 km / h, the engine water temperature is simulated to be greater than 70℃, the transmission oil temperature is simulated to be greater than 70℃, the road slope is simulated to be greater than -5°, and the brake pedal opening degree is simulated to be greater than 0°. Under the simulation of the above influencing factors, the reference working condition is the downhill mode that should be in response to the above influencing factors. If the obtained target working condition is to enter the downhill mode, it is judged that the target working condition and the reference working condition are the same working condition, that is, the to-be-tested gearbox has been switched from the original working condition to the reference working condition.

[0053] As an optional embodiment, in step S102, the parameter simulation signal is sent to the to-be-tested gearbox, including: obtaining the state information of the to-be-tested gearbox; and in response to the to-be-tested gearbox not being in a fault state, sending the parameter simulation signal to the to-be-tested gearbox.

[0054] In this embodiment, the state information of the to-be-tested gearbox is obtained, and according to the state information, it can be judged whether the to-be-tested gearbox is in a fault state. If the to-be-tested gearbox is not in a fault state, it indicates that the to-be-tested gearbox is in a normal working state, and the parameter simulation signal can be sent to the to-be-tested gearbox to test the working condition of the to-be-tested gearbox. If the to-be-tested gearbox is in a fault state, the parameter simulation signal can be temporarily stored first, and all existing faults are cleaned up. After completing the cleaning of all existing faults, the parameter simulation signal is sent to the to-be-tested gearbox to continue testing the working condition of the to-be-tested gearbox. The state information can be used to indicate whether the to-be-tested gearbox is in a fault state.

[0055] In the embodiment of the present application, different parameter simulation signals can be used to simulate corresponding influencing factors for different to-be-tested working conditions, and then the target working condition after obtaining the response parameter simulation signal is acquired, and whether the target working condition and the corresponding reference working condition are the same working condition is judged, so as to determine whether the to-be-tested gearbox can normally respond to the current influencing factor to enter the corresponding working condition, and finally the working condition test of the to-be-tested gearbox is completed, thereby solving the technical problem of low efficiency of the working condition test of the vehicle gearbox, and achieving the technical effect of improving the efficiency of the working condition test of the vehicle gearbox.

[0056] Embodiment 2

[0057] The technical solutions of the embodiments of the present application will be illustrated below in combination with preferred embodiments.

[0058] With the continuous improvement of economic development and people's living standards, vehicles are not only a daily means of transportation, but also to meet the changing needs of users, and the development of vehicles is also more and more diversified. However, with the update and iteration of factors affecting the working condition of the vehicle gearbox, the difficulty and challenge of testing the working condition of the vehicle gearbox are also increasing. The common test scheme mainly tests the working condition of the vehicle gearbox through bench test and real vehicle test, but this method does not have complete test analysis and sufficient test cases for testing the working condition of the vehicle gearbox, so it cannot meet all the working conditions of the vehicle gearbox, and it is impossible to improve the efficiency of testing the working condition of the vehicle gearbox.

[0059] Therefore, in order to overcome the above problems, in a related technology, a transmission control unit (TCU) test system and method are disclosed, which comprises: a load box for respectively supplying power to a signal module and a transmission control module, and realizing signal transmission between the signal module and the transmission control module; the signal module comprises a switch signal generator and a function signal generator connected with the load box respectively, the switch signal generator sends a key signal to the transmission control module through the load box, so that the transmission control module enters the working state according to the key signal, and the function signal generator is used for controlling and adjusting the output signal of the transmission control module, so that the transmission control load module executes corresponding actions according to the output signal; the transmission control load module receives the output signal sent by the transmission control module through the load box, and sends a state feedback signal to the load box after executing the corresponding actions. However, this system only tests the working condition of slope change and gear shifting through system integration, although it reduces the working condition test cost of the transmission control unit, but it does not provide a complete test method and complete test cases for testing the working condition of the gearbox.

[0060] In another related technology, a vehicle TCU test system combined with hardware-in-the-loop (HIL) and hydraulic valve plate assembly (HCU) is disclosed, which comprises a hardware-in-the-loop test bench, a hydraulic valve plate test assembly and a transmission control system, the transmission control system is in communication connection with the hydraulic valve plate test assembly, the hardware-in-the-loop test bench is in communication connection with the hydraulic valve plate test assembly, and the hardware-in-the-loop test bench is in communication connection with the transmission control system. However, the system only solves the problem of the difference between the hydraulic valve plate bench current control and the transmission current control based on the structural arrangement and communication link in the test system, and does not provide a specific test method for testing the working conditions of the transmission.

[0061] However, the embodiment of the present application proposes a test method for a vehicle transmission. The test method can simulate the influencing factors of the vehicle transmission under different working conditions through simulation to determine whether the vehicle transmission can successfully enter the corresponding working condition under the influencing factors. The test environment is closer to the real vehicle, the test case coverage is wider, and the test method is more convenient, thereby solving the technical problem of low efficiency of testing the working conditions of the vehicle transmission, and improving the efficiency of testing the working conditions of the vehicle transmission.

[0062] Figure 2 is a schematic diagram of a controller communication architecture according to an embodiment of the present application, as shown in Figure 2 The controller communication architecture can include an engine control unit 201, a transmission control unit 202, a shift actuator controller 203, an electronic shifter control unit 204, a gateway 205, an on-board diagnostic system 206, a brake control system 207, a driving mode control unit 208, and a body electronic stability control unit 209.

[0063] Optionally, the engine control unit 201, the transmission control unit 202, the shift actuator controller 203 and the electronic shifter control unit 204 can communicate with the gateway 205 through a power bus; the gateway 205 can communicate with the on-board diagnostic system 206; the brake control system 207, the driving mode control unit 208 and the body electronic stability control unit 209 can communicate with the gateway 205 through a chassis bus.

[0064] Figure 3 is a schematic diagram of a hardware-in-the-loop test system according to an embodiment of the present application, as shown in Figure 3As shown, the hardware-in-the-loop test system can include an experiment management system 301, test software 302, a fault injection board 303, a real-time simulation model 304, an input / output wiring layer 305, a bus 306, a signal conditioning unit 307, a load simulation unit 308, a connector 309, and a controller 310.

[0065] Optionally, the real-time simulation model 304 can be configured to communicate with the experiment management system 301 and the test software 302; the fault injection board 303 can be configured to create open-circuit, short-circuit, and other electrical faults for hard-wired signals, and to send signals in response to the faults to the input / output wiring layer 305 through the load simulation unit 308; the input / output wiring layer 305 can be configured to send analog signals output by the real-time simulation model 304 to the fault injection board 303 through the signal conditioning unit 307; the bus 306 can be configured to send analog signals output by the real-time simulation model 304 to the fault injection board 303; and the connector 309 can be configured to communicate with the fault injection board 303 and the controller 310.

[0066] Optionally, the test method for the vehicle transmission in the embodiments of the present application can be applied to the following working condition tests: test driving mode, test manual shifting mode, test cold mode, test uphill mode, test downhill mode, test plateau mode, and test turning mode.

[0067] The test driving mode can be performed as follows: first, clear the historical faults existing in the system, so that the transmission control unit is powered on by default in comfort mode; then, send a power-on signal to the hardware-in-the-loop system through the upper computer, start the system, and then modify the mode selection signal value sent by the driving mode control unit to the transmission control unit through the test interface software (the mode selection signal value can be 1, 2, 3, 4, 5, 6, or 7, wherein 1 corresponds to comfort mode, 2 corresponds to economy mode, 3 corresponds to sports mode, 4 corresponds to snow mode, 5 corresponds to off-road mode, 6 corresponds to ruts mode, and 7 corresponds to sand mode); and then, observe whether the transmission control unit switches to the corresponding mode; if the transmission control unit switches to the corresponding mode, the driving mode is valid and the test is successful; if the transmission control unit does not switch to the corresponding mode, the driving mode is invalid.

[0068] The test of the manual shift mode can be performed in the following manner: by simulating the gear sequence manager signal in the hardware-in-the-loop system, setting the manual shift mode switch of the gear sequence manager, modifying the gear lever position signal sent by the gear sequence manager, modifying the throttle speed signal, and observing whether the current gear is shifted from the original gear after the upshift operation, if the current gear is shifted from the original gear, the manual shift mode is activated, and the test is successful, if the current gear is not shifted from the original gear, the manual shift mode is not activated. In addition, with the modification of the throttle opening signal, the maximum number of gears that can be shifted is observed, at which time the shift range of the manual shift mode can be tested. Similarly, the gear lever position signal can be modified to move backward at a higher gear, and it is observed whether the current gear is downshifted, if the current gear is downshifted, the manual shift mode is activated, and the test is successful, if the current gear is not downshifted, the manual shift mode is not activated.

[0069] The test of the cold mode can be performed in the following manner: by modifying the engine water temperature signal value to be lower than the set temperature threshold through the test interface software, and modifying the transmission oil temperature signal value to be lower than the set temperature threshold, the upper computer communicates to the hardware-in-the-loop system, the temperature signal is simulated through the simulation board card, and is sent to the transmission control unit through this channel, the transmission control unit responds to the change of the signal value, and it is observed whether the working mode of the transmission control unit changes to the cold mode, if the cold mode is changed, the cold mode is activated, and the test is successful, if the cold mode is not changed, the cold mode is not activated. In addition, if the cold mode is successfully activated, the given engine water temperature signal and transmission oil temperature signal can be modified until the transmission control unit does not respond, to obtain the temperature threshold for activating the cold mode.

[0070] The test of the uphill mode can be performed in the following manner: mode one, by modifying the signal value through the test interface software, it can be ensured that the oil temperature signal is greater than 42℃, the water temperature is greater than 72℃, and the slope is greater than 5°, the accelerator pedal opening degree is greater than 0°, it is observed whether the uphill mode can be entered, if the uphill mode can be entered, the uphill mode is activated, and the test is successful, if the uphill mode is not entered, the uphill mode is not activated; mode two, by modifying the signal value through the test interface software, the slope is set to be less than 3°, and the gear is set to be a non-forward gear, it is observed whether the uphill mode can be exited, if the uphill mode can be exited, the test is successful, if the uphill mode is not exited, an error is reported. In addition, by modifying the signal values of the slope, water temperature, oil temperature, etc. respectively until the uphill mode cannot be entered, the slope signal threshold, water temperature signal threshold, oil temperature signal threshold, etc. for entering the uphill mode can be obtained.

[0071] The test of the downhill mode can be performed in the following ways: way one, the signal value is modified by the test interface software, the oil temperature is greater than 70°, the water temperature is greater than 70°, the vehicle speed is greater than 40km / h, the slope is greater than -5°, and the brake pedal opening degree is greater than 0°, and whether the downhill mode can enter the downhill mode is observed, if the downhill mode can enter the downhill mode, the downhill mode is activated, and the test is successful, if the downhill mode does not enter, the downhill mode is not activated; way two, the signal value is modified by the test interface software, the slope signal is less than -2°, and whether the downhill mode can exit is observed, if the downhill mode can exit, the test is successful, if the downhill mode does not exit, an error is reported.

[0072] The test of the plateau mode can be performed in the following ways: the altitude pressure signal value is modified to be less than or equal to 0.61 by the test interface software, and whether the plateau mode can enter the plateau mode is observed, if the plateau mode can enter the plateau mode, the plateau mode is activated, and the test is successful, if the plateau mode does not enter, the plateau mode is not activated. In addition, if the plateau mode is successfully activated, the altitude pressure signal value can be modified until the plateau mode does not enter, so as to obtain the altitude pressure signal threshold.

[0073] The test of the turning mode can be performed in the following ways: the signal value is modified by the test interface software, the gear is set to the forward gear, the vehicle speed is 40km / h, and the left and right wheel speed difference meets the turning working condition, or the throttle state is modified, and whether the gear is raised is observed, if the gear is not raised, the turning mode is activated, and the test is successful, if the gear is raised, the turning mode is not activated.

[0074] In this embodiment, the real-time simulation model is used to simulate the influencing factors of the working condition of the gearbox for testing, the parameter simulation signal is obtained, the parameter simulation signal is sent to the gearbox, and the controller controls the gearbox to enter the working condition corresponding to the parameter simulation signal, after the gearbox enters the working condition corresponding to the parameter simulation signal, the real-time simulation model receives the target working condition of the gearbox in response to the parameter simulation signal, and finally the target working condition and the reference working condition are compared to determine whether they are the same working condition, so as to determine whether the gearbox can normally respond to the current influencing factors to enter the corresponding working condition, thereby solving the technical problem of low efficiency of testing the working condition of the vehicle gearbox, and achieving the technical effect of improving the efficiency of testing the working condition of the vehicle gearbox.

[0075] Embodiment 3

[0076] According to the embodiment of the present application, a vehicle gearbox testing device is also provided. It should be noted that the vehicle gearbox testing device can be used to execute the vehicle gearbox testing method in embodiment 1.

[0077] Figure 4 is a schematic diagram of a test device of a vehicle transmission according to an embodiment of the present application. As shown in Figure 4 , a test device 400 of a vehicle transmission can comprise a first obtaining unit 401, a sending unit 402, a second obtaining unit 403 and a determining unit 404.

[0078] The first obtaining unit 401 is configured to obtain a parameter simulation signal of a to-be-tested transmission, wherein the parameter simulation signal is configured to simulate at least an ambient temperature and a road slope of a road section where a vehicle is located under a reference working condition.

[0079] The sending unit 402 is configured to send the parameter simulation signal to the to-be-tested transmission.

[0080] The second obtaining unit 403 is configured to obtain a target working condition of the to-be-tested transmission after the to-be-tested transmission responds to the parameter simulation signal.

[0081] The determining unit 404 is configured to determine a test result of the to-be-tested transmission based on the target working condition and the reference working condition, wherein the test result is configured to represent whether the to-be-tested transmission is switched from an original working condition to the reference working condition, the original working condition being a working condition of the to-be-tested transmission before the to-be-tested transmission responds to the parameter simulation signal.

[0082] Optionally, the reference working condition comprises at least a heating working condition and a driving working condition.

[0083] Optionally, the test device 400 of the vehicle transmission further comprises a first simulation unit configured to, in a case where the reference working condition is the heating working condition, simulate the parameter simulation signal as simulating the ambient temperature as a reference temperature, wherein the reference temperature is less than a temperature threshold, and the temperature threshold is a temperature threshold value at which the vehicle controls the to-be-tested transmission to enter the heating working condition.

[0084] Optionally, the test device 400 of the vehicle transmission further comprises a second simulation unit configured to, in a case where the reference working condition is the driving working condition, simulate the parameter simulation signal as simulating the road slope as a reference slope, an opening and closing degree of an acceleration pedal of the vehicle as a reference opening and closing degree, and / or an altitude of the road section as a reference altitude, wherein the reference slope is a slope threshold value at which the vehicle controls the to-be-tested transmission to enter the driving working condition, the reference opening and closing degree is an opening and closing degree threshold value at which the vehicle controls the to-be-tested transmission to enter the driving working condition, and the reference altitude is an altitude threshold value at which the vehicle controls the to-be-tested transmission to enter the driving working condition.

[0085] Optionally, the determining unit 404 comprises a first determination module configured to, in response to the target working condition being the same as the reference working condition, determine that the to-be-tested transmission is switched from the original working condition to the reference working condition, and a second determination module configured to, in response to the target working condition being different from the reference working condition, determine that the to-be-tested transmission is not switched from the original working condition to the reference working condition.

[0086] Optionally, the sending unit 402 can comprise: an acquisition module, configured to acquire state information of the to-be-tested gearbox, wherein the state information is used to represent whether the to-be-tested gearbox is in a fault state; and a sending module, configured to send the parameter simulation signal to the to-be-tested gearbox in response to the to-be-tested gearbox not being in the fault state.

[0087] In this embodiment, the first acquisition unit is configured to acquire a parameter simulation signal of the to-be-tested gearbox, wherein the parameter simulation signal is used to simulate at least an ambient temperature and a road slope of a road section on which the vehicle is located under a reference working condition; the sending unit is configured to send the parameter simulation signal to the to-be-tested gearbox; the second acquisition unit is configured to acquire a target working condition of the to-be-tested gearbox after the to-be-tested gearbox responds to the parameter simulation signal; and the determination unit is configured to determine a test result of the to-be-tested gearbox based on the target working condition and the reference working condition, wherein the test result is used to represent whether the to-be-tested gearbox is switched from an original working condition to the reference working condition, and the original working condition is a working condition of the to-be-tested gearbox before the to-be-tested gearbox responds to the parameter simulation signal, thereby solving the technical problem of low efficiency of testing the working condition of the gearbox of the vehicle and achieving the technical effect of improving the efficiency of testing the working condition of the gearbox of the vehicle.

[0088] Embodiment 4

[0089] According to the embodiments of the present application, a computer readable storage medium is also provided, which comprises a stored program, wherein the program performs the testing method of the gearbox of the vehicle in the embodiment 1 when executed.

[0090] Embodiment 5

[0091] According to the embodiments of the present application, a processor is also provided, which is used to run a program, wherein the program performs the testing method of the gearbox of the vehicle in the embodiment 1 when executed by the processor.

[0092] Embodiment 6

[0093] According to the embodiments of the present application, a vehicle is also provided, which is used to perform any one of the testing methods of the gearbox of the vehicle in the embodiment 1.

[0094] The above-mentioned serial numbers of the embodiments of the present application only serve for description, and do not represent the advantages or disadvantages of the embodiments.

[0095] In the above-mentioned embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0096] In several embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other manners. For example, the described unit embodiments can be divided into other ways, for example, the division of units can be a logical function division, and there can be another division manner in actual implementation; for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed coupling or direct coupling or communication connection between units can be indirect coupling or communication connection through some interfaces, and can be electrical or other forms.

[0097] The units described as separate components may or can not be physically separate, and the components shown as units may or can not be physical units, i.e., they can be located in one place or distributed on multiple units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0098] In addition, the functional units in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present alone, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0099] If the integrated unit is realized in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes a number of instructions for causing a computer device (which can be a personal computer, a server or a network device, etc.) to execute all or part of the steps of the embodiments of the present application. The aforementioned storage medium includes: a U disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a mobile hard disk, a magnetic disk or an optical disk, and various media that can store program codes.

[0100] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. A test method for a vehicle transmission, characterized in that, include: Acquire the parameter simulation signal of the transmission under test, wherein the parameter simulation signal is used to at least simulate the ambient temperature and road slope of the road segment where the vehicle is located under reference working conditions, and the ambient temperature includes engine water temperature and transmission oil temperature; The simulated signal of the parameter is sent to the gearbox under test; Obtain the target operating condition of the transmission under test after responding to the parameter simulation signal; Based on the target operating condition and the reference operating condition, the test result of the transmission under test is determined, wherein the test result is used to characterize whether the transmission under test has switched from the original operating condition to the reference operating condition, and the original operating condition is the operating condition in which the transmission under test was before responding to the parameter simulation signal.

2. The method according to claim 1, characterized in that, The reference operating conditions include at least: heating operating conditions and driving operating conditions.

3. The method according to claim 2, characterized in that, The method further includes: When the reference operating condition is the heating operating condition, the parameter simulation signal is used to simulate the ambient temperature as the reference temperature, wherein the reference temperature is less than a temperature threshold, and the temperature threshold is the critical temperature value at which the vehicle controls the transmission under test to enter the heating operating condition.

4. The method according to claim 2, characterized in that, The method further includes: When the reference operating condition is the driving condition, the parameter simulation signal is used to simulate the road slope as the reference slope, the accelerator pedal opening degree as the reference opening degree, and / or the road segment elevation as the reference elevation. The reference slope is the slope threshold for the vehicle to control the transmission under test to enter the driving condition, the reference opening degree is the opening degree threshold for the vehicle to control the transmission under test to enter the driving condition, and the reference elevation is the elevation threshold for the vehicle to control the transmission under test to enter the driving condition.

5. The method according to claim 1, characterized in that, Based on the target operating condition and the reference operating condition, the test results of the transmission under test are determined, including: In response to the target operating condition and the reference operating condition being the same operating condition, it is determined that the transmission under test is switched from the original operating condition to the reference operating condition; If the target operating condition and the reference operating condition are different operating conditions, it is determined that the transmission under test has not switched from the original operating condition to the reference operating condition.

6. The method according to claim 1, characterized in that, Sending the simulated parameter signal to the gearbox under test includes: Obtain the status information of the transmission under test, wherein the status information is used to characterize whether the transmission under test is in a fault state; In response to the fact that the transmission under test is not in the fault state, the parameter analog signal is sent to the transmission under test.

7. A testing device for a vehicle transmission, characterized in that, include: The first acquisition unit is used to acquire the parameter simulation signal of the transmission under test, wherein the parameter simulation signal is used to at least simulate the ambient temperature and road slope of the road section where the vehicle is located under reference working conditions, and the ambient temperature includes engine water temperature and transmission oil temperature. A transmitting unit is used to transmit the parameter analog signal to the gearbox under test; The second acquisition unit is used to acquire the target operating condition of the transmission under test after responding to the parameter simulation signal; The determining unit is used to determine the test result of the transmission under test based on the target operating condition and the reference operating condition, wherein the test result is used to characterize whether the transmission under test has switched from the original operating condition to the reference operating condition, and the original operating condition is the operating condition in which the transmission under test was before responding to the parameter simulation signal.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein, when the program is executed, it controls the device on which the computer-readable storage medium is located to perform the method according to any one of claims 1 to 6.

9. A processor, characterized in that, The processor is used to run a program, wherein the program is executed by the processor to perform the method according to any one of claims 1 to 6.

10. A vehicle, characterized in that, The vehicle is used to perform the test method for the vehicle transmission as described in any one of claims 1 to 6.

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