CN115753089A - Vehicle gearbox testing method and device, processor and vehicle - Google Patents

Abstract

The invention discloses a testing method and device for a vehicle gearbox, a processor and a vehicle. The method comprises the following steps: acquiring a working condition simulation signal of the gearbox to be tested, wherein the working condition simulation signal is used for simulating an operation event of the gearbox to be tested, and the operation event is used for testing a function to be tested of the gearbox to be tested; sending the working condition analog signal to a gearbox to be tested; acquiring a feedback signal returned by the gearbox to be tested in response to the working condition simulation signal, wherein the feedback signal is used for indicating the operation executed by the gearbox to be tested after responding to the operation event; and determining a test result of the function to be tested based on the feedback signal, wherein the test result is used for representing whether the function to be tested is effective or not. The invention solves the technical problem of low coverage of the test case for testing the function of the vehicle gearbox.

Description

Vehicle gearbox testing method and device, processor and vehicle

Technical Field

The invention relates to the field of vehicles, in particular to a method, a device, a processor and a vehicle for testing a vehicle gearbox.

Background

In the related art, the vehicle gearbox is mainly tested through a bench test and a real vehicle test, but the method can only test the mechanical structure and the assembly structure of the vehicle gearbox, and is difficult to realize complete testing of the function of the vehicle gearbox, so that the technical problem of low coverage of a test case for testing the function of the vehicle gearbox is caused.

In view of the above-mentioned technical problem that the coverage of the test case for testing the functions of the vehicle transmission is low, no effective solution has been proposed at present.

Disclosure of Invention

The embodiment of the invention provides a method and a device for testing a vehicle gearbox, a processor and a vehicle, which at least solve the technical problem of low coverage of a test case for testing the function of the vehicle gearbox.

According to one aspect of an embodiment of the present invention, a method of testing a vehicle transmission is provided. The test method can comprise the following steps: acquiring a working condition simulation signal of the gearbox to be tested, wherein the working condition simulation signal is used for simulating an operation event of the gearbox to be tested, and the operation event is used for testing a function to be tested of the gearbox to be tested; sending the working condition analog signal to a gearbox to be tested; acquiring a feedback signal returned by the gearbox to be tested in response to the working condition simulation signal, wherein the feedback signal is used for indicating the operation executed by the gearbox to be tested after responding to the operation event; and determining a test result of the function to be tested based on the feedback signal, wherein the test result is used for representing whether the function to be tested is effective or not.

Optionally, the function to be tested at least includes: the method comprises the steps of performing key unlocking function on the gearbox to be tested, performing gear shifting function on the gearbox to be tested, and performing automatic parking gear returning function on the gearbox to be tested.

Optionally, the testing method for the vehicle transmission further comprises: under the condition that the function to be tested is a key unlocking function or the function to be tested is a gear shifting function, the working condition simulation signal is used for simulating that a gear lever of the gearbox to be tested is pushed from a first gear position to a second gear position; and under the condition that the function to be tested is the automatic parking gear returning function, the working condition simulation signal is used for simulating the power-off of a power system of the vehicle and the power system of the vehicle, or is used for simulating the state of a vehicle door of the vehicle to be in an unclosed state.

Optionally, determining a test result of the function to be tested based on the feedback signal comprises: and determining that the key unlocking function is effective in response to the fact that the feedback signal is not received within the first target duration threshold range or prompt information from the gearbox to be tested is received within the first target duration threshold range, wherein the prompt information is used for prompting that an unlocking key of the gearbox to be tested is pressed.

Optionally, determining a test result of the function to be tested based on the feedback signal comprises: and determining that the gear shifting function is effective in response to the fact that the feedback signal is received within the second target duration threshold range and the feedback signal is consistent with a first reference signal, wherein the first reference signal is used for representing the working condition that the gearbox to be tested is located at the second gear position.

Optionally, determining a test result of the function to be tested based on the feedback signal comprises: and determining that the automatic returning to the parking gear function is effective in response to the fact that the feedback signal is received within the third target duration threshold range and the feedback signal is consistent with a second reference signal, wherein the second reference signal is used for representing that the gear of the gearbox to be tested is adjusted from the original position to the parking gear position.

Optionally, obtaining a feedback signal returned by the transmission to be tested in response to the operating condition analog signal includes: and simulating the operation event of the control unit of the gearbox to be tested in response to the working condition simulation signal, and acquiring a feedback signal.

According to an aspect of an embodiment of the present invention, there is provided a test apparatus for a vehicle transmission, which may include: the device comprises a first acquisition unit, a second acquisition unit and a control unit, wherein the first acquisition unit is used for acquiring a working condition analog signal of the gearbox to be tested, the working condition analog signal is used for simulating an operation event of the gearbox to be tested, and the operation event is used for testing a function to be tested of the gearbox to be tested; the transmitting unit is used for transmitting the working condition analog signal to the gearbox to be tested; the second acquisition unit is used for acquiring a feedback signal returned by the gearbox to be tested in response to the working condition simulation signal, wherein the feedback signal is used for indicating the operation executed by the gearbox to be tested after responding to the operation event; and the determining unit is used for determining a test result of the function to be tested based on the feedback signal, wherein the test result is used for representing whether the function to be tested is effective or not.

According to another aspect of the embodiments of the present invention, there is also provided a processor. The processor is used for executing a program, wherein the program is executed by the processor to execute the testing method of the vehicle transmission according to the embodiment of the invention.

According to another aspect of the embodiment of the invention, the vehicle is used for executing the testing method of the vehicle gearbox of the embodiment of the invention.

In the embodiment of the invention, a working condition analog signal of the gearbox to be tested is obtained, wherein the working condition analog signal is used for simulating an operation event of the gearbox to be tested, and the operation event is used for testing a function to be tested of the gearbox to be tested; sending the working condition simulation signal to a gearbox to be tested; acquiring a feedback signal returned by the gearbox to be tested in response to the working condition simulation signal, wherein the feedback signal is used for indicating the operation executed by the gearbox to be tested after responding to the operation event; and determining a test result of the function to be tested based on the feedback signal, wherein the test result is used for representing whether the function to be tested is effective or not. That is to say, in the embodiment of the present invention, the method for simulating the operation event of the transmission to be tested by using the operating condition analog signal of the transmission to be tested is used to test the function to be tested of the transmission to be tested, the obtained operating condition analog signal is firstly sent to the transmission to be tested, then the feedback signal generated by the transmission to be tested responding to the operating condition analog signal is obtained, and finally the operation executed by the transmission to be tested after responding to the operation event is determined according to the feedback signal, so as to determine whether the function to be tested of the transmission to be tested is effective, thereby achieving the purpose of checking whether the reaction capability and the reaction mode of the transmission to be tested meet the expectation under the conventional operating condition, further solving the technical problem of low coverage of the test case for testing the function of the transmission to be tested, and achieving the technical effect of improving the coverage of the test case for testing the function of the transmission to be tested.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

FIG. 1 is a flow chart of a method of testing a vehicle transmission according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a controller communication architecture according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a hardware-in-the-loop test system according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a testing device for a vehicle transmission according to an embodiment of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in other sequences than those illustrated or described herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Example 1

According to an embodiment of the invention, there is provided a method of testing a vehicle transmission, it being noted that the steps illustrated in the flowchart of the drawings may be carried out in a computer system, such as a set of computer executable instructions, and that while a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be carried out in an order different than that presented herein.

Fig. 1 is a flow chart of a method of testing a vehicle transmission according to an embodiment of the invention, which may include the steps of, as shown in fig. 1:

step S101, a working condition analog signal of the gearbox to be tested is obtained, wherein the working condition analog signal is used for simulating an operation event of the gearbox to be tested, and the operation event is used for testing a function to be tested of the gearbox to be tested.

In the technical solution provided in step S101 of the present invention, a working condition analog signal of the transmission to be tested may be generated by a hardware-in-loop tool and simulation test software, where the working condition analog signal may be used to simulate an operation event for testing a function to be tested of the transmission to be tested, and the working condition analog signal may include: simulating torque signals, vehicle speed signals, gear signals, etc., simulating power connection signals, door signals, etc., and the operation events may include: the change of position operation of the gear lever of the gearbox under test, for example, pushed from the parking gear position to the forward gear position, the operation event may further include: powering down the entire vehicle, e.g., powering down a power system of the vehicle, the operational events may further include: the operation of changing the door state, for example, the door state of the vehicle is not closed, and the like, and the operation is only for example and is not particularly limited.

For example, when the key unlocking function of the gearbox to be tested is tested, the working condition simulation signal can be used for simulating that the gear lever is pushed to the forward gear position from the parking gear position under the condition that the unlocking key is not pressed down by the vehicle.

And S102, sending the working condition analog signal to the gearbox to be tested.

In the technical solution provided in step S102 of the present invention, after the working condition analog signal is generated by the hardware-in-loop tool and the simulation test software, the working condition analog signal may be sent to the transmission to be tested, and then the transmission to be tested is waited to respond to the received working condition analog signal.

And step S103, obtaining a feedback signal returned by the gearbox to be tested in response to the working condition analog signal.

In the technical solution provided in the above step S103 of the present invention, after the working condition simulation signal is sent to the transmission to be tested, the transmission to be tested may respond to the received working condition simulation signal and generate a feedback signal, then the simulation test software may obtain a feedback signal returned by the transmission to be tested in response to the working condition simulation signal, and based on the obtained feedback signal, the simulation test software may further determine a specific operation executed by the transmission to be tested after responding to an operation event for testing the function to be tested, where the feedback signal may be used to indicate an operation executed by the transmission to be tested after responding to the operation event.

Optionally, the feedback signal may be used to indicate a specific operation performed by the gearbox under test after responding to the operation event, where the specific operation performed by the gearbox under test after responding to the operation event may include the following cases: in the first situation, after a gear lever of a gearbox to be tested is pushed from a parking gear position to a forward gear position, a key prompt from the gearbox to be tested is received within a certain time; in the second situation, after a gear lever of the gearbox to be tested is pushed from a parking gear position to a forward gear position, the key reminding from the gearbox to be tested is not received within a certain time; in case three, after the gear shifting condition is set, the gear signal is changed to another gear to be changed within a certain time; in case four, after the setting of the gear shift condition is completed, the gear signal is not changed to another gear to be replaced within a certain time; in the fifth condition, after the power system of the vehicle is powered off and the power system of the vehicle is powered off, the gear signal is automatically changed to the parking gear within a certain time; in the sixth situation, after the power system of the vehicle is powered off and the power system of the vehicle is powered off, the gear signal is not automatically changed to the parking gear within a certain time; seventhly, after the door state of the vehicle is in a non-closed state and a brake pedal and an accelerator pedal are not stepped on, the gear signal is automatically changed to a parking gear within a certain time; in the eighth case, the gear signal is not automatically changed to the parking gear within a certain time after the door of the vehicle is in the non-closed state and the brake pedal and the accelerator pedal are not stepped on, which is only an example and is not limited specifically herein.

And step S104, determining a test result of the function to be tested based on the feedback signal, wherein the test result is used for representing whether the function to be tested is effective or not.

In the technical solution provided in step S104 of the present invention, after the simulation test software obtains the feedback signal returned by the transmission to be tested, redundancy processing is performed on the feedback signal, that is, signal content indicating redundant information in the feedback signal is deleted, only effective signal content capable of feeding back a test result is retained, and then according to the feedback signal subjected to redundancy processing, whether the current function to be tested is effective is determined, that is, the test result of the function to be tested is determined, so that the purpose of checking whether the reaction capability and the reaction mode of the vehicle transmission meet expectations under a conventional working condition is achieved.

Optionally, the information extraction is performed on the redundant processed feedback signal to obtain a specific operation executed by the transmission to be tested after responding to the operation event, and then whether the current function to be tested is valid is determined according to the obtained specific operation, so that a test result of the function to be tested can be determined, for example: if the obtained specific operation is that after a gear lever of the gearbox to be tested is pushed from a parking gear position to a forward gear position, a key prompt from the gearbox to be tested is received within a certain time, the key unlocking function can be judged to be effective, and therefore a test result is determined; if the obtained specific operation is that after the gear lever of the gearbox to be tested is pushed from the parking gear position to the forward gear position, the key prompt from the gearbox to be tested is not received within a certain time, the key unlocking function can be judged to be invalid, and therefore the test result is determined; if the gear signal is changed to another gear to be replaced within a certain time after the gear shifting condition is set, the gear shifting function can be judged to be effective, and therefore a test result is determined; if the gear signal is not changed to another gear to be replaced within a certain time after the gear shifting condition is set, the gear shifting function can be judged to be invalid, and therefore a test result is determined; if the gear signal is automatically changed to the parking gear within a certain time after the power-off of the power system of the vehicle and the power system of the vehicle are powered off, the function of automatically returning to the parking gear can be judged to be effective, and therefore a test result is determined; if the vehicle door state is not closed, and after the brake pedal is not stepped and the accelerator pedal is not stepped, the gear signal is automatically changed to the parking position within a certain time, it may be determined that the automatic parking position returning function is invalid, and thus the test result is determined, which is only illustrated here and not specifically limited.

In the above steps S101 to S104, a working condition analog signal of the transmission to be tested is obtained, where the working condition analog signal is used to simulate an operation event of the transmission to be tested, and the operation event is used to test a function of the transmission to be tested; sending the working condition analog signal to a gearbox to be tested; acquiring a feedback signal returned by the gearbox to be tested in response to the working condition simulation signal, wherein the feedback signal is used for indicating the operation executed by the gearbox to be tested after responding to the operation event; and determining a test result of the function to be tested based on the feedback signal, wherein the test result is used for representing whether the function to be tested is effective or not. That is to say, in the embodiment of the present invention, the method for simulating the operation event of the transmission to be tested by using the operating condition analog signal of the transmission to be tested is used to test the function to be tested of the transmission to be tested, the obtained operating condition analog signal is firstly sent to the transmission to be tested, then the feedback signal generated by the transmission to be tested responding to the operating condition analog signal is obtained, and finally the operation executed by the transmission to be tested after responding to the operation event is determined according to the feedback signal, so as to determine whether the function to be tested of the transmission to be tested is effective, thereby achieving the purpose of checking whether the reaction capability and the reaction mode of the transmission to be tested meet the expectation under the conventional operating condition, further solving the technical problem of low coverage of the test case for testing the function of the transmission to be tested, and achieving the technical effect of improving the coverage of the test case for testing the function of the transmission to be tested.

The above-described method of this embodiment is further described below.

As an optional embodiment, the function to be tested at least includes: the method comprises the steps of performing key unlocking on the gearbox to be tested, performing gear shifting on the gearbox to be tested, and performing automatic parking gear returning on the gearbox to be tested.

In this embodiment, the function to be tested may include: the automatic transmission control method comprises the steps of a key unlocking function of a transmission to be tested, an operation prompting function of the transmission to be tested, a gear shifting function of the transmission to be tested and an automatic returning parking gear function of the transmission to be tested, wherein the key unlocking function of the transmission to be tested can be that an unlocking key is required to be pressed down on a vehicle to execute gear shifting operation, the gear shifting function of the transmission to be tested can be that when a gear shifting condition is set, a current gear is changed to a corresponding gear to be changed, and the automatic returning parking gear function of the transmission to be tested can be that when a door state of the vehicle is in a non-closed state, a brake pedal is not stepped on, and an accelerator pedal is not stepped on, a driver leaves an automatic returning parking gear mode.

As an alternative embodiment, the method for testing a vehicle transmission further comprises: under the condition that the function to be tested is a key unlocking function or the function to be tested is a gear shifting function, the working condition simulation signal is used for simulating that a gear lever of the gearbox to be tested is pushed from a first gear position to a second gear position; and under the condition that the function to be tested is the automatic parking gear returning function, the working condition simulation signal is used for simulating the power-off of a power system of the vehicle and the power system of the vehicle, or is used for simulating the state of a vehicle door of the vehicle to be in an unclosed state.

In this embodiment, corresponding simulation operations can be performed through different working condition simulation signals to test different functions to be tested, and when the function to be tested is a key unlocking function or a gear shifting function, the corresponding working condition simulation signal of the gearbox to be tested can be acquired through a hardware-in-the-loop tool and simulation test software, so as to simulate an operation event for testing the key unlocking function or the gear shifting function, that is, simulate that a gear lever of the gearbox to be tested is pushed from a first gear position to a second gear position, so that the key unlocking function test or the gear shifting function test is performed to judge whether the key unlocking function or the gear shifting function is effective; under the condition that the function to be tested is the automatic parking gear returning function, the corresponding working condition simulation signal of the gearbox to be tested can be acquired through a hardware-in-loop tool and simulation test software, so that an operation event for testing the automatic parking gear returning function is simulated, namely, the power-off of a power system of a vehicle and the power system of the vehicle are simulated, or the state of a vehicle door of the vehicle is simulated to be in an unclosed state, and therefore the automatic parking gear returning function test is carried out to judge whether the automatic parking gear returning function is effective or not.

Alternatively, the first gear position may be a gear position originally located before the corresponding simulation operation is performed, and the second gear position may be another gear position to which the corresponding simulation operation is to be changed.

As an alternative embodiment, the step S104, determining the test result of the function to be tested based on the feedback signal, includes: and determining that the key unlocking function is effective in response to the fact that the feedback signal is not received within the first target time length threshold range or the prompt message from the gearbox to be tested is received within the first target time length threshold range.

In this embodiment, when the function to be tested is the key unlocking function, after the corresponding simulation operation is performed, if the feedback signal is not received within the first target duration threshold range, or the prompt message from the transmission to be tested is received within the first target duration threshold range, it may be determined that the key unlocking function is valid, where the prompt message may be used to prompt the unlocking key of the transmission to be tested to be pressed.

Alternatively, the first target duration threshold range may be a delay time set corresponding to the key unlock function at the time of factory shipment, and the delay time may be 100ms, that is, from the instant when the shift lever is pushed, the shift may be completed by pressing the unlock key within the delay time of 100 ms; if the gear lever is not pushed when the gear is changed and the feedback signal cannot be received within the delay time of 100ms, the key unlocking function is judged to be effective; if the unlocking key is not pressed after the gear lever is pushed and the prompt of pressing the unlocking key from the gearbox to be tested is received within the delay time of 100ms, the key unlocking function is judged to be effective, so that the aim of testing whether the reaction capability and the reaction mode of the vehicle gearbox meet the expectation under the conventional working condition is fulfilled.

As an alternative embodiment, the step S104, determining the test result of the function to be tested based on the feedback signal, includes: and in response to receiving the feedback signal within the second target time length threshold range, and the feedback signal is consistent with the first reference signal, determining that the gear shifting function is effective.

In this embodiment, in the case that the function to be tested is a gear shift function, after the corresponding simulated gear shift operation is performed, if the original working condition of the transmission case to be tested is changed into the working condition corresponding to the second gear position, that is, if a feedback signal is received within the second target time length threshold range and the feedback signal is consistent with the first reference signal, it may be determined that the gear shift function is valid, and thus a test result of the gear shift function is determined, where the first reference signal may be used to represent that the transmission case to be tested is in the working condition corresponding to the second gear position.

Optionally, the second target time length threshold range may be a delay time set by the factory corresponding to the gear shifting function, where the delay time may be 60ms, for example, when the gear needs to be changed from the reverse gear to the parking gear, a corresponding simulated gear shifting operation is performed, and if the gear is changed from the reverse gear to the parking gear within the delay time of 60ms, that is, the original working condition of the transmission to be tested is changed to the working condition corresponding to the second gear position, and the feedback signal is consistent with the first reference signal, it is determined that the gear shifting function is valid; if the gear is not changed from the reverse gear to the parking gear within the delay time of 60ms, namely the original working condition of the gearbox to be tested is not changed into the working condition corresponding to the second gear position, and the feedback signal is not consistent with the first reference signal, the gear shifting function is determined to be invalid, so that the aim of checking whether the reaction capability and the reaction mode of the vehicle gearbox meet the expectation under the conventional working condition is fulfilled.

As an alternative embodiment, step S104, determining a test result of the function to be tested based on the feedback signal, includes: and in response to receiving the feedback signal within the third target time length threshold range, and the feedback signal is consistent with the second reference signal, determining that the automatic parking position returning function is effective.

In this embodiment, in the case that the function to be tested is the automatic return-to-park function, after the corresponding simulation operation is performed, if the gear position of the transmission to be tested is adjusted from the original position to the park position, that is, if the feedback signal is received within the third target time length threshold range and the feedback signal is consistent with the second reference signal, responding to the above situation, that is, determining that the automatic return-to-park function is valid, thereby determining the test result of the automatic return-to-park function, where the second reference signal may be used to represent that the gear position of the transmission to be tested is adjusted from the original position to the park position.

Optionally, the third target duration threshold range may be a delay time set corresponding to the automatic parking return function when the vehicle leaves a factory, where the delay time may be 120ms, for example, when the vehicle needs to perform automatic parking, a corresponding simulation operation is performed, and if the vehicle starts to perform automatic parking within the delay time of 120ms, that is, the gear of the transmission to be tested is adjusted from the original position to the parking position, and the feedback signal is consistent with the second reference signal, it is determined that the automatic parking return function is valid; if the vehicle does not start to be automatically parked within the delay time of 120ms, namely, the gear of the gearbox to be tested is not adjusted to the parking gear from the original position, and the feedback signal is not consistent with the second reference signal, the function of automatically returning to the parking gear is judged to be invalid, so that the aim of checking whether the reaction capability and the reaction mode of the vehicle gearbox meet expectations under the conventional working condition is fulfilled.

As an alternative embodiment, in step S103, obtaining a feedback signal returned by the transmission to be tested in response to the operating condition simulation signal includes: and simulating a control unit operation event of the gearbox to be tested in response to the working condition simulation signal to acquire a feedback signal.

In this embodiment, different working condition analog signals may be obtained through the hardware-in-the-loop tool and the simulation test software, then, according to the different working condition analog signals, an operation event of a type corresponding to the operation of the control unit of the transmission to be tested may be simulated, and then, the transmission to be tested receives the working condition analog signal and responds to the working condition analog signal, that is, the operation event simulated by the working condition analog signal is responded, so that the transmission to be tested generates and returns a feedback signal, and thus, the simulation test software may obtain the feedback signal returned by the transmission to be tested in response to the working condition analog signal.

In the embodiment of the invention, corresponding simulation operation can be carried out on different functions to be tested through different working condition simulation signals, then the feedback signal returned in response to the working condition simulation signal is obtained, and whether the feedback signal is consistent with the corresponding reference signal is judged, so that whether the functions to be tested are effective is determined, the technical problem of low coverage of test cases for testing the functions of the vehicle gearbox is solved, and the technical effect of improving the coverage of the test cases for testing the functions of the vehicle gearbox is achieved.

Example 2

The technical solutions of the embodiments of the present invention will be illustrated below with reference to preferred embodiments.

With the economic development and the continuous improvement of the living standard of people, the vehicle not only serves as a daily tool for riding instead of walk, but also meets the changing requirements of users, and the development of the vehicle is more diversified. However, with the updating and iteration of the electrical and electronic functions of the vehicle transmission, the difficulty and challenge of the functional test of the vehicle transmission are getting bigger. The common test scheme mainly tests the mechanical structure and the assembly structure of the vehicle gearbox, but the functional test of the vehicle gearbox does not have complete test analysis and enough test cases, so that the coverage of the test cases for testing the functions of the vehicle gearbox cannot be improved.

Therefore, in order to overcome the above problems, in a related art, a gearbox test method and a test bench are disclosed, the gearbox test method adopts an engine matched with a tested gearbox to simulate the whole vehicle environment to provide a power source for the tested gearbox, adopts a retarder to absorb the kinetic energy of the tested gearbox, and collects the engine, the tested gearbox and the retarder on a test platform through communication. However, in the gearbox test method, the engine, the tested gearbox and the speed reducer are only collected on one test platform through communication, so that the equipment cost of a manufacturer is reduced, and the electronic and electrical functions of the vehicle gearbox are not tested.

In another related art, a test detection method for an Automatic-Transmission (AT) Transmission is disclosed, and the test detection method for the AT Transmission includes: detecting the no-load power loss of the AT transmission to be tested; under the hydraulic working condition, the practical performance test of each gear bench test is completed; under the mechanical working condition, completing each gear test; detecting whether the change relation between the rotating speed, the flow and the pressure of the hydraulic pump is normal or not at different rotating speeds; and checking whether the oil passages of all the operating piece machines are normal. However, the test detection method of the AT gearbox only carries out fault test on the hydraulic working condition and the mechanical working condition, and does not test the electronic and electric functions of the vehicle gearbox.

However, the embodiment of the invention provides a testing method for a vehicle gearbox. The test method can carry out complete test analysis on the electronic and electrical functions of the vehicle gearbox in a simulation mode, so that whether the reaction capability and the reaction mode of the vehicle gearbox meet expectations or not under the conventional working condition is checked, the technical problem of low coverage of test cases for testing the functions of the vehicle gearbox is solved, and the coverage of the test cases for testing the functions of the vehicle gearbox can be improved.

Fig. 2 is a schematic diagram of a controller communication architecture according to an embodiment of the present invention, and as shown in fig. 2, the controller communication architecture may include: the system comprises an engine control unit 201, a transmission control unit 202, an automatic transmission 203, a gateway 204, a vehicle type of exploration vehicles 205 and a vehicle body electronic stability control unit 206.

Alternatively, an engine control unit 201 may be used to communicate with the transmission control unit 202 and the gateway 204; the gateway 204 can be used for communicating with a quest vehicle type 205 and a vehicle body electronic stability control unit 206.

Fig. 3 is a schematic diagram of a hardware-in-the-loop test system according to an embodiment of the present invention, and as shown in fig. 3, the hardware-in-the-loop test system may include: the system comprises 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.

Optionally, a real-time simulation model 304, which may be used to communicate with the experiment management system 301 and the test software 302; a fault injection board 303, which can be used to make electrical faults such as open circuit, short circuit, etc. for hard-line signals, and to send signals responding to the faults to the input/output wiring layer 305 through the load simulation unit 308; the input/output wiring layer 305 may be configured to send the analog signal output by the real-time simulation model 304 to the fault injection board 303 through the signal conditioning unit 307; a bus 306, which may be used to send the analog signal output by the real-time simulation model 304 to the fault injection board 303; a connector 309 may be used to communicate with the fault injection board 303 and the controller 310.

Optionally, the hardware-in-the-loop test system may be used to test the following functions: the method comprises the steps of testing a gear shifting logic function, testing the automatic return-to-parking gear function of gears, and testing the gear shifting function in a full-automatic parking mode.

Testing the shift logic function may include: the method comprises the steps of testing the effectiveness of an unlocking button in the gear shifting process, testing the effectiveness of a parking gear button, testing the logic in the gear shifting operation process, testing the correctness of gear shifting operation prompts and the like.

Testing the effectiveness of the unlock button during the shift process may be performed as follows: the method comprises the steps that a gear lever position signal is modified through test interface software, through communication between an upper computer and a hardware-in-the-loop test system, a board card simulates the gear lever position signal and sends the gear lever position signal to an automatic transmission controller, the gear lever is pushed to a forward gear position from a parking gear position, meanwhile, an unlocking instruction is sent for 100ms, a prompt signal sent to an instrument by the automatic transmission controller is observed, if the prompt signal indicates that an unlocking key is required to be pressed for gear shifting, the delay time is less than 100ms, if the gear shifting is successful, the delay time is more than 100ms, and repeated tests can obtain the delay time of the unlocking key.

Testing the validity of the park button may be performed as follows: the gear is set to be a forward gear or a reverse gear, the pressing time of a parking gear button is set to be 60ms, whether the gear keeps the original gear or enters the parking gear is observed, if the gear enters the parking gear, the parking gear button is effective, the test is passed, and if the gear keeps the original gear, the parking gear button is ineffective.

The logic during the test shift operation may proceed as follows: through revising operating mode analog signal, make it satisfy the condition of shifting to the reverse gear from parking shelves, wherein, the condition of shifting can be: pressing an unlocking key, stepping down a brake, pushing a gear shifting rod forwards to a position for reversing the gear, and not stepping on the accelerator, observing whether the gear is switched to the reverse gear or not, if the gear is switched to the reverse gear, the gear shifting logic is correct, the test is passed, and if the gear is not switched to the reverse gear and other prompts exist, the gear shifting logic is wrong; similarly, according to the above manner, other shift logics may be tested to determine whether the corresponding shift logic is correct.

Testing the correctness of the gear shifting operation prompt can be carried out as follows: the current vehicle running condition is set as follows by modifying the working condition analog signal: the method comprises the following steps that an unlocking key is not pressed, braking is pressed, a gear shifting rod is pushed forwards to a reverse gear position and an accelerator is not pressed, if a display instrument receives prompt information about 'a gear shifting unlocking key is pressed', a gear shifting operation prompt is correct, a test is passed, and if the display instrument does not receive prompt information about 'a gear shifting unlocking key is pressed', a gear shifting operation prompt is wrong; similarly, the conditions of the required accelerator, the required brake, the required vehicle speed and the like can be tested by the above method to determine whether the corresponding prompt is correct, and finally the priority of the gear shifting operation prompt can be obtained, wherein the priority of the gear shifting operation prompt is as follows: unlocking button, prompting to step on the brake, prompting to stop, prompting to reduce the speed of the vehicle, and prompting to release the accelerator.

The test gear automatic return to park function may include: the method comprises the steps of testing the automatic return to the parking position function after the vehicle is flamed out, testing the automatic return to the parking position function after the driver leaves, and testing the original position function which is not met by the automatic return to the parking position condition.

The test of the automatic return to the parking gear function after the vehicle is switched off can be carried out in the following way: firstly, an ignition signal sent to an automatic transmission controller is modified, then the whole vehicle is controlled to be powered off, whether the gear is automatically changed to the parking gear or not is observed, if the gear is automatically changed to the parking gear, the function of automatically returning to the parking gear after the vehicle is flamed out is effective, and if the gear is not automatically changed to the parking gear, the function of automatically returning to the parking gear after the vehicle is flamed out is ineffective.

The test driver can automatically return to the parking position after leaving by the following method: the automobile door signal and the safety belt signal are modified to be opened, the accelerator brake signal is modified to be not stepped, whether the gear is automatically returned to the parking gear or not is observed, if the gear is automatically changed to the parking gear, the function that the driver automatically returns to the parking gear after leaving is effective, and if the gear is not automatically changed to the parking gear, the function that the driver automatically returns to the parking gear after leaving is ineffective.

The function of testing that the original gear is maintained under the condition that the automatic return to the parking gear is not met can be carried out in the following modes: the automatic returning to the parking gear condition is not met by respectively setting a vehicle door signal, a safety belt signal, an accelerator brake signal and a vehicle speed signal, whether the original gear is kept is respectively observed, if the original gear is kept, the automatic returning to the parking gear condition is not met, the original gear function is kept effective, and if the original gear is not kept, the automatic returning to the parking gear condition is not met, and the original gear function is kept ineffective.

Testing the shift function in the fully automatic parking mode may be performed as follows: firstly, no fault or historical fault is ensured in a test state, an enabling signal responding to a request is modified by an upper computer, the automatic transmission controller can respond to the request after receiving the enabling signal, then a gear shifting command is completely controlled by an electronic stability control unit of a vehicle body, whether a current gear is switched to a parking gear, a forward gear, a reverse gear and the like along with the gear shifting request signal is observed by modifying a gear shifting request signal of the electronic stability control unit of the vehicle body, if the current gear is switched to the parking gear, the forward gear or the reverse gear along with the gear shifting request signal, a gear shifting function in a full-automatic parking mode is effective, and if the current gear is not switched to the parking gear, the forward gear or the reverse gear along with the gear shifting request signal, the gear shifting function in the full-automatic parking mode is ineffective. Similarly, the automatic return to park function in the fully automatic parking mode may be tested in the manner described above.

In the embodiment, the operation event for testing the function to be tested of the gearbox is simulated through the real-time simulation model, the working condition simulation signal can be obtained, the working condition simulation signal is sent to the gearbox, the gearbox is controlled by the controller to execute the operation corresponding to the working condition simulation signal, after the operation corresponding to the working condition simulation signal is executed, the real-time simulation model receives a feedback signal returned by the gearbox responding to the working condition simulation signal, and finally whether the function to be tested is effective or not is determined according to the feedback signal, so that the technical problem of low coverage of the test case for testing the function of the gearbox of the vehicle is solved, and the technical effect of improving the coverage of the test case for testing the function of the gearbox of the vehicle is achieved.

Example 3

According to the embodiment of the invention, the testing device for the vehicle gearbox is further provided. It should be noted that the test device for a vehicle transmission can be used to execute the test method for a vehicle transmission in embodiment 1.

Fig. 4 is a schematic diagram of a testing device for a vehicle transmission according to an embodiment of the present invention. As shown in fig. 4, a test apparatus 400 for a vehicle transmission may include: a first acquisition unit 401, a transmission unit 402, a second acquisition unit 403, and a determination unit 404.

The first obtaining unit 401 is configured to obtain a working condition analog signal of the transmission to be tested, where the working condition analog signal is used to simulate an operation event of the transmission to be tested, and the operation event is used to test a function of the transmission to be tested.

And a sending unit 402, configured to send the operating condition analog signal to the transmission to be tested.

And a second obtaining unit 403, configured to obtain a feedback signal returned by the transmission under test in response to the operating condition simulation signal, where the feedback signal is used to indicate an operation performed by the transmission under test after responding to the operating event.

A determining unit 404, configured to determine a test result of the function to be tested based on the feedback signal, where the test result is used to indicate whether the function to be tested is valid.

Optionally, the function to be tested at least includes: the method comprises the steps of performing key unlocking function on the gearbox to be tested, performing gear shifting function on the gearbox to be tested, and performing automatic parking gear returning function on the gearbox to be tested.

Optionally, the testing apparatus 400 for a vehicle transmission may further include: the first simulation unit is used for simulating a gear lever of the gearbox to be tested to be pushed from a first gear position to a second gear position under the condition that the function to be tested is a key unlocking function or the function to be tested is a gear shifting function; and the second simulation unit is used for simulating the power-off of a power system of the vehicle and the power system of the vehicle under the condition that the function to be tested is the automatic parking gear returning function, or simulating the state of a vehicle door of the vehicle to be in an unclosed state.

Alternatively, the determining unit 404 may include: and the first response module is used for determining that the key unlocking function is effective in response to the fact that the feedback signal is not received within the first target duration threshold range or prompt information from the gearbox to be tested is received within the first target duration threshold range, wherein the prompt information is used for prompting that an unlocking key of the gearbox to be tested is pressed.

Alternatively, the determining unit 404 may include: and the second response module is used for responding to the fact that a feedback signal is received in the second target duration threshold range and the feedback signal is consistent with the first reference signal, and then determining that the gear shifting function is effective, wherein the first reference signal is used for representing the working condition that the gearbox to be tested is located at the second gear position.

Alternatively, the determining unit 404 may include: and the third response module is used for responding to the fact that the feedback signal is received within the third target duration threshold range and is consistent with the second reference signal, and then determining that the automatic parking gear returning function is effective, wherein the second reference signal is used for representing that the gear of the gearbox to be tested is adjusted to the parking gear position from the original position.

Alternatively, the second obtaining unit 403 may include: and the acquisition module is used for responding to the working condition analog signal to simulate the control unit operation event of the gearbox to be tested and acquiring the feedback signal.

In the embodiment, the first obtaining unit is used for obtaining a working condition analog signal of the gearbox to be tested, wherein the working condition analog signal is used for simulating an operation event of the gearbox to be tested, and the operation event is used for testing a function to be tested of the gearbox to be tested; the transmitting unit is used for transmitting the working condition analog signal to the gearbox to be tested; the second acquisition unit is used for acquiring a feedback signal returned by the gearbox to be tested in response to the working condition simulation signal, wherein the feedback signal is used for indicating the operation executed by the gearbox to be tested after responding to the operation event; the determining unit is used for determining a test result of the function to be tested based on the feedback signal, wherein the test result is used for representing whether the function to be tested is effective or not, the technical problem of low coverage of the test case for testing the function of the vehicle gearbox is solved, and the technical effect of improving the coverage of the test case for testing the function of the vehicle gearbox is achieved.

Example 4

There is also provided, in accordance with an embodiment of the present invention, a processor for executing a program, wherein the program, when executed by the processor, performs the method of testing a vehicle transmission of embodiment 1.

Example 5

According to an embodiment of the invention, there is also provided a vehicle for carrying out the method of testing a transmission of a vehicle of any one of embodiments 1.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, a division of a unit may be a division of a logic function, and an actual implementation may have another division, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or may not be executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-only memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk, and various media capable of storing program codes.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.

Claims (10)

1. A method of testing a vehicle transmission, comprising:

acquiring a working condition simulation signal of a gearbox to be tested, wherein the working condition simulation signal is used for simulating an operation event of the gearbox to be tested, and the operation event is used for testing a function to be tested of the gearbox to be tested;

sending the working condition simulation signal to the gearbox to be tested;

acquiring a feedback signal returned by the gearbox to be tested in response to the working condition simulation signal, wherein the feedback signal is used for indicating the operation executed by the gearbox to be tested after responding to the operation event;

and determining a test result of the function to be tested based on the feedback signal, wherein the test result is used for representing whether the function to be tested is effective or not.

2. The method according to claim 1, characterized in that said functions to be tested comprise at least:

the automatic transmission control system comprises a key unlocking function of the transmission to be tested, a gear shifting function of the transmission to be tested and an automatic parking gear returning function of the transmission to be tested.

3. The method of claim 2, further comprising:

under the condition that the function to be tested is the key unlocking function or the function to be tested is the gear shifting function, the working condition simulation signal is used for simulating that a gear lever of the gearbox to be tested is pushed from a first gear position to a second gear position;

and under the condition that the function to be tested is the automatic parking gear returning function, the working condition simulation signal is used for simulating the power-off of a power system of the vehicle and the power system of the vehicle, or is used for simulating the state of a vehicle door of the vehicle to be in an unclosed state.

4. The method of claim 3, wherein determining the test result of the function-under-test based on the feedback signal comprises:

and determining that the key unlocking function is effective in response to the fact that the feedback signal is not received within a first target time length threshold range or prompt information from the gearbox to be tested is received within the first target time length threshold range, wherein the prompt information is used for prompting that an unlocking key of the gearbox to be tested is pressed.

5. The method of claim 3, wherein determining the test result of the function-under-test based on the feedback signal comprises:

and determining that the gear shifting function is effective in response to the fact that the feedback signal is received within a second target time length threshold range and the feedback signal is consistent with a first reference signal, wherein the first reference signal is used for representing a working condition that the gearbox to be tested is located at the second gear position.

6. The method of claim 3, wherein determining the test result of the function-under-test based on the feedback signal comprises:

and determining that the automatic returning to the parking gear function is effective in response to the feedback signal received within a third target time length threshold range and the feedback signal is consistent with a second reference signal, wherein the second reference signal is used for indicating that the gear of the gearbox to be tested is adjusted from an original position to a parking gear position.

7. The method of claim 1, wherein obtaining a feedback signal returned by the transmission under test in response to the operating condition simulation signal comprises:

and simulating the control unit of the gearbox to be tested to operate the operation event in response to the working condition simulation signal, and acquiring the feedback signal.

8. A test device for a vehicle transmission, comprising:

the device comprises a first acquisition unit, a second acquisition unit and a control unit, wherein the first acquisition unit is used for acquiring a working condition analog signal of the gearbox to be tested, the working condition analog signal is used for simulating an operation event of the gearbox to be tested, and the operation event is used for testing a function to be tested of the gearbox to be tested;

the transmitting unit is used for transmitting the working condition analog signal to the gearbox to be tested;

the second obtaining unit is used for obtaining a feedback signal returned by the gearbox to be tested in response to the working condition simulation signal, wherein the feedback signal is used for indicating the operation executed by the gearbox to be tested after the gearbox to be tested responds to the operation event;

and the determining unit is used for determining a test result of the function to be tested based on the feedback signal, wherein the test result is used for representing whether the function to be tested is effective or not.

9. A processor, characterized in that the processor is configured to run a program, wherein the program when run by the processor performs the method of any of claims 1 to 7.

10. A vehicle for carrying out a method of testing a vehicle gearbox according to any one of claims 1 to 7.

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