CN113237654A - Clutch detection method, vehicle and computer-readable storage medium - Google Patents
Clutch detection method, vehicle and computer-readable storage medium Download PDFInfo
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- CN113237654A CN113237654A CN202110598381.8A CN202110598381A CN113237654A CN 113237654 A CN113237654 A CN 113237654A CN 202110598381 A CN202110598381 A CN 202110598381A CN 113237654 A CN113237654 A CN 113237654A
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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- G01M13/022—Power-transmitting couplings or clutches
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Abstract
The invention discloses a clutch detection method, a vehicle and a computer readable storage medium, wherein the method comprises the following steps: when a test instruction for testing the clutch in the vehicle to be tested is triggered, acquiring a pressure value corresponding to the clutch according to the test instruction, and reading a torque value corresponding to the pressure value; determining a target torque-to-pressure ratio of the clutch according to the pressure value and the torque value; and if the target torsion-pressure ratio is matched with the preset torsion-pressure ratio range, determining that the test result of the clutch test is that the test is passed. Whether the test result is normal is judged according to the test instruction, the problems that the manual clutch fault troubleshooting needs to be carried out by relying on abundant experience of workers to judge, the manual clutch fault troubleshooting takes long time and the troubleshooting efficiency is low can be solved, the vehicle clutch fault troubleshooting efficiency is improved, and the detection of the clutch function is more intelligent.
Description
Technical Field
The invention relates to the technical field of automobile manufacturing, in particular to a clutch detection method, a vehicle and a computer readable storage medium.
Background
With the continuous improvement of living standard, automobiles have come into the lives of thousands of households. During the running of the automobile, the driver can press or release the clutch pedal according to the requirement, so that the engine and the gearbox are temporarily separated and gradually jointed, and the power input by the engine to the gearbox is cut off or transmitted. The clutch is used as a common component in mechanical transmission, a transmission system can be separated or connected at any time, the clutch is an essential part for ensuring the safe driving of an automobile, the function of the clutch is usually detected in order to ensure the driving safety of the automobile, manual troubleshooting is mostly adopted when the function of the clutch is detected, so that the vehicle faults of slipping, gear shifting difficulty, gear non-engaging and the like in the driving process of the automobile are avoided, but the manual troubleshooting of the clutch needs to depend on abundant working experience of workers, the troubleshooting time is long, and the efficiency is low.
Disclosure of Invention
The invention mainly aims to provide a clutch detection method. The problem of how to make the function detection to the clutch more intelligent through improving the efficiency to vehicle clutch troubleshooting is solved.
In order to achieve the above object, the present invention provides a clutch detection method, including the steps of:
when a test instruction for testing the clutch in the vehicle to be tested is triggered, acquiring a pressure value corresponding to the clutch according to the test instruction, and reading a torque value corresponding to the pressure value;
determining a target torque-to-pressure ratio of the clutch according to the pressure value and the torque value;
and if the target torsion-pressure ratio is matched with the preset torsion-pressure ratio range, determining that the test result of the clutch test is that the test is passed.
Optionally, the step of determining the target torque-to-pressure ratio of the clutch according to the pressure value and the torque value includes:
if a plurality of groups of pressure values and a plurality of groups of torque values exist, calculating a pressure difference value corresponding to each pressure value, and calculating a torque difference value corresponding to each torque value;
traversing each pressure difference value, and determining a determined torque difference value corresponding to the traversed pressure difference value according to each torque difference value;
calculating a ratio of the determined torque difference and the traversed pressure difference;
and calculating the average value of the ratio corresponding to each pressure difference value, and taking the average value as the target torque-to-pressure ratio of the clutch.
Optionally, the step of calculating a pressure difference value corresponding to each pressure value includes:
and traversing each pressure value in sequence, determining an adjacent pressure value adjacent to the traversed pressure value, calculating a first difference value between the adjacent pressure value and the traversed pressure value, and taking the first difference value as a pressure difference value corresponding to the traversed pressure value.
Optionally, the step of calculating a torque difference value corresponding to each torque value includes:
and traversing each torque value in sequence, determining adjacent torque values adjacent to the traversed torque value, calculating a second difference value between the adjacent torque values and the traversed torque value, and taking the second difference value as a torque difference value corresponding to the traversed torque value.
Optionally, the step of obtaining a pressure value corresponding to the clutch according to the test instruction and reading a torque value corresponding to the pressure value includes:
acquiring a first pressure value of the clutch according to the test instruction, reading a first torque value corresponding to the first pressure value, taking the first pressure value as a pressure value, and taking the first torque value as a torque value;
the step of determining a target torque to pressure ratio of the clutch from the pressure value and the torque value comprises:
and calculating a first ratio between the first torque value and the first pressure value, and taking the first ratio as a target torque-to-pressure ratio of the clutch.
Optionally, the step of determining that the test result of the clutch test is a test passing step if the target torque-to-pressure ratio matches the preset torque-to-pressure ratio range includes:
determining an inner torsion-pressure ratio range corresponding to the inner clutch torsion-pressure ratio based on a preset torsion-pressure ratio range, and detecting whether the inner clutch torsion-pressure ratio is within the inner torsion-pressure ratio range;
and if the torque-to-pressure ratio of the inner clutch is within the range of the inner torque-to-pressure ratio, determining whether the target torque-to-pressure ratio is matched with a preset torque-to-pressure ratio range or not based on the torque-to-pressure ratio of the outer clutch.
Optionally, the step of determining whether the target torque-to-pressure ratio matches a preset torque-to-pressure ratio range based on the external clutch torque-to-pressure ratio includes:
determining an outer torsion-pressure ratio range corresponding to the outer clutch torsion-pressure ratio range based on a preset torsion-pressure ratio range, and detecting whether the outer clutch torsion-pressure ratio is within the outer torsion-pressure ratio range;
and determining whether the target torsion-pressure ratio is matched with a preset torsion-pressure ratio range according to a detection result of whether the torsion-pressure ratio of the outer clutch is detected to be within the outer torsion-pressure ratio range.
Optionally, before the step of obtaining the pressure value corresponding to the clutch according to the test instruction and reading the torque value corresponding to the pressure value, the method further includes:
controlling the working state of the vehicle to be tested to enter a test state from a default state according to the test instruction;
and determining the pressure value of the clutch in the vehicle to be tested in the test state.
Further, to achieve the above object, the present invention also provides a vehicle including a memory, a processor, and a clutch detection program stored on the memory and operable on the processor, wherein: the clutch detection program when executed by the processor implements the steps of the clutch detection method as described above.
Further, to achieve the above object, the present invention also provides a computer-readable storage medium having a clutch detection program stored thereon, which when executed by a processor, implements the steps of the clutch detection method as described above.
The invention provides a clutch detection method, a vehicle and a computer readable storage medium, which are used for obtaining a pressure value of a clutch of the vehicle to be detected, obtaining a corresponding torque value through the pressure value, calculating a ratio of the torque value to the pressure value to determine a target torque-to-pressure ratio of the clutch, matching the target torque-to-pressure ratio with a preset torque-to-pressure ratio range obtained before a test, and determining whether the target torque-to-pressure ratio is successfully matched with the preset torque-to-pressure ratio, so that whether the test of the clutch in the vehicle to be detected passes or not is determined. Whether the test result is normal or not is judged according to the matching of the test result and the preset torque ratio range obtained according to the test instruction, the judgment can be carried out by relying on abundant experience of workers when the manual clutch troubleshooting is carried out, the manual troubleshooting takes a long time, and the troubleshooting is low in efficiency, so that the troubleshooting efficiency of the vehicle clutch is improved, and the detection of the function of the clutch is more intelligent.
Drawings
FIG. 1 is a schematic diagram of an apparatus in a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a first embodiment of a clutch detection method of the present invention;
FIG. 3 is a schematic diagram of clutch detection in the clutch detection method of the present invention;
FIG. 4 is a schematic diagram of the clutch detection method according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, fig. 1 is a schematic device structure diagram of a hardware operating environment according to an embodiment of the present invention.
The terminal of the embodiment of the invention can be a vehicle. As shown in fig. 1, the vehicle may include: a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.
Optionally, the vehicle may also include a camera, RF (Radio Frequency) circuitry, sensors, audio circuitry, WiFi modules, and the like. Such as light sensors, motion sensors, and other sensors. Specifically, the light sensor may include an ambient light sensor that adjusts the brightness of the display screen based on the ambient light level and a proximity sensor that turns off the display screen and/or backlight when the hardware device is moved to the ear. Of course, the hardware device may also be configured with other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, and so on, which are not described herein again.
Those skilled in the art will appreciate that the configuration of the vehicle shown in FIG. 1 is not intended to be limiting and may include more or fewer components than those shown, or some components in combination, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a kind of computer storage medium, may include therein an operating system, a network communication module, a user interface module, and a clutch detection program.
In the terminal shown in fig. 1, the network interface 1004 is mainly used for connecting to a backend server and performing data communication with the backend server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and the processor 1001 may be configured to invoke the clutch detection program stored in the memory 1005 and perform the following operations:
in order to achieve the above object, the present invention provides a clutch detection method, including the steps of:
when a test instruction for testing the clutch in the vehicle to be tested is triggered, acquiring a pressure value corresponding to the clutch according to the test instruction, and reading a torque value corresponding to the pressure value;
determining a target torque-to-pressure ratio of the clutch according to the pressure value and the torque value;
and if the target torsion-pressure ratio is matched with the preset torsion-pressure ratio range, determining that the test result of the clutch test is that the test is passed.
Further, the processor 1001 is configured to call the clutch detection program stored in the memory 1005, and further performs the following operations:
if a plurality of groups of pressure values and a plurality of groups of torque values exist, calculating a pressure difference value corresponding to each pressure value, and calculating a torque difference value corresponding to each torque value;
traversing each pressure difference value, and determining a determined torque difference value corresponding to the traversed pressure difference value according to each torque difference value;
calculating a ratio of the determined torque difference and the traversed pressure difference;
and calculating the average value of the ratio corresponding to each pressure difference value, and taking the average value as the target torque-to-pressure ratio of the clutch.
Further, the processor 1001 is configured to call the clutch detection program stored in the memory 1005, and further performs the following operations:
and traversing each pressure value in sequence, determining an adjacent pressure value adjacent to the traversed pressure value, calculating a first difference value between the adjacent pressure value and the traversed pressure value, and taking the first difference value as a pressure difference value corresponding to the traversed pressure value.
Further, the processor 1001 is configured to call the clutch detection program stored in the memory 1005, and further performs the following operations:
and traversing each torque value in sequence, determining adjacent torque values adjacent to the traversed torque value, calculating a second difference value between the adjacent torque values and the traversed torque value, and taking the second difference value as a torque difference value corresponding to the traversed torque value.
Further, the processor 1001 is configured to call the clutch detection program stored in the memory 1005, and further performs the following operations:
acquiring a first pressure value of the clutch according to the test instruction, reading a first torque value corresponding to the first pressure value, taking the first pressure value as a pressure value, and taking the first torque value as a torque value;
the step of determining a target torque to pressure ratio of the clutch from the pressure value and the torque value comprises:
and calculating a first ratio between the first torque value and the first pressure value, and taking the first ratio as a target torque-to-pressure ratio of the clutch.
Further, the processor 1001 is configured to call the clutch detection program stored in the memory 1005, and further performs the following operations:
determining an inner torsion-pressure ratio range corresponding to the inner clutch torsion-pressure ratio based on a preset torsion-pressure ratio range, and detecting whether the inner clutch torsion-pressure ratio is within the inner torsion-pressure ratio range;
and if the torque-to-pressure ratio of the inner clutch is within the range of the inner torque-to-pressure ratio, determining whether the target torque-to-pressure ratio is matched with a preset torque-to-pressure ratio range or not based on the torque-to-pressure ratio of the outer clutch.
Further, the processor 1001 is configured to call the clutch detection program stored in the memory 1005, and further performs the following operations:
determining an outer torsion-pressure ratio range corresponding to the outer clutch torsion-pressure ratio range based on a preset torsion-pressure ratio range, and detecting whether the outer clutch torsion-pressure ratio is within the outer torsion-pressure ratio range;
and determining whether the target torsion-pressure ratio is matched with a preset torsion-pressure ratio range according to a detection result of whether the torsion-pressure ratio of the outer clutch is detected to be within the outer torsion-pressure ratio range.
Further, the processor 1001 is configured to call the clutch detection program stored in the memory 1005, and further performs the following operations:
controlling the working state of the vehicle to be tested to enter a test state from a default state according to the test instruction;
and determining the pressure value of the clutch in the vehicle to be tested in the test state.
The specific embodiment of the present invention applied to the vehicle is substantially the same as the following embodiments of the method for detecting the applied clutch, and will not be described herein again.
Referring to fig. 2, fig. 2 is a schematic flowchart illustrating a clutch detection method according to a first embodiment of the present invention, wherein the clutch detection method includes the following steps:
step S100, when a test instruction for testing the clutch in the vehicle to be tested is triggered, acquiring a pressure value corresponding to the clutch according to the test instruction, and reading a torque value corresponding to the pressure value;
the clutch is mounted between the engine and the transmission and is the assembly in the vehicle driveline that is directly associated with the engine. Clutches are components that disconnect and transfer power between an engine and a vehicle driveline. The function of the device is to ensure that the engine and the transmission can be gradually jointed, thereby ensuring the stable starting of the automobile; temporarily disconnecting the engine from the transmission to facilitate shifting and reduce shock during shifting; when the automobile is braked emergently, the brake can play a role in separation, and the transmission systems such as a speed changer and the like are prevented from being overloaded, so that a certain protection effect is achieved. Clutches cooled with oil are known as wet clutches. The UDS (Unified Diagnostic Services) is a Unified specification of Diagnostic Services, and the Diagnostic tool is connected to all control units in the vehicle, and the control units all enable the UDS Services. UDS is essentially a collection of services, the services of which comprise 6 major classes, for a total of 26. Each Service has its own independent ID, i.e., SID (diagnostic Service ID).
In this embodiment, the clutches may include a wet double clutch including an inner clutch and an outer clutch. The clutch detection program is installed on a vehicle to be detected, when the vehicle clutch needs to be detected, a clutch detection system on the vehicle can be started through a button, an option frame, a command input mode and the like, and after the clutch detection system is started, a test instruction for detecting the clutch of the vehicle to be detected is triggered, wherein the test instruction refers to a test instruction for setting the overall working condition and state of the vehicle to be detected or setting, acquiring and the like the pressure and the torque of the clutch of the vehicle to be detected. After the test command is triggered, the clutch detection system sends a UDS command to a TCU (Transmission Control Unit) of the vehicle to be tested, so as to set the clutch accordingly. Setting a pressure value of the clutch by sending a pressure value setting UDS instruction to the TCU, and setting the pressure of the clutch as a pressure value corresponding to the pressure value setting UDS instruction after the TCU receives the pressure value setting UDS instruction sent by the clutch detection system; and sending a torque value reading UDS instruction corresponding to the pressure value to the TCU, reading a torque value corresponding to the pressure value, obtaining data stream information collected by an engine and a transmission sensor of the vehicle to be tested under the pressure value after the TCU receives the torque value reading UDS instruction under the pressure value sent by the clutch detection system, determining an engine transmission torque value, taking the engine transmission torque value as a clutch torque value, and feeding back the torque value of the clutch to the clutch detection system.
Step S200, determining a target torque-to-pressure ratio of the clutch according to the pressure value and the torque value;
the target torque-to-pressure ratio refers to a ratio of torque to pressure corresponding to the clutch under the current pressure, and after the pressure value and the torque value are obtained, the ratio of the torque value to the pressure value is used as the target torque-to-pressure ratio of the clutch. It is understood that the target torque-to-pressure ratio of the clutch may be determined by calculating the ratio of a single set of torque values to pressure values, calculating the average value of the ratios of multiple sets of torque values to pressure values, calculating the average value of the ratios of the differences between two sets of single torque values and the differences between two sets of single pressure values corresponding to the difference between two sets of single torque values, and the like.
And step S300, if the target torsion-pressure ratio is matched with a preset torsion-pressure ratio range, determining that the test result of the clutch test is that the test is passed.
The preset torsion-pressure ratio range refers to a range standard of a torsion-pressure ratio which is predetermined before testing, a reference value is provided for a test result, after a target torsion-pressure ratio of the clutch is obtained, the target torsion-pressure ratio of the clutch is matched with the range standard of the torsion-pressure ratio, and whether the clutch is in a normal working state can be determined according to whether the target torsion-pressure ratio of the clutch is successfully matched with the standard range. In this embodiment, the preset torsion-pressure ratio range is an optimal range of the clutch torsion-pressure ratio, which is obtained according to specific working conditions after a lot of test bench tests are performed by technicians, for ensuring the driving safety of the vehicle, and the optimal range is used as the preset torsion-pressure ratio range of this embodiment. The matching mode can be that a target torsion-pressure ratio of the clutch is compared with a preset torsion-pressure ratio range obtained before testing, whether the target torsion-pressure ratio is within the preset torsion-pressure ratio range is determined, whether the target torsion-pressure ratio is matched with the preset torsion-pressure ratio range is determined, and if the target torsion-pressure ratio is within the preset torsion-pressure ratio range, the matching is determined to be successful; and if the target torsion-pressure ratio exceeds the preset torsion-pressure ratio range, determining that the matching fails.
After the pressure value and the torque value are obtained, the ratio of the torque value to the pressure value is used as a target torque-to-pressure ratio of the clutch, the target torque-to-pressure ratio of the clutch is verified, and whether the target torque-to-pressure ratio of the clutch is matched with a preset torque-to-pressure ratio range or not is judged. If the target torque-to-pressure ratio of the clutch is successfully matched with the preset torque-to-pressure ratio range, the test result of the clutch test can be judged to be that the test is passed, and the current clutch is in a normal working state. If the target torsion-pressure ratio of the clutch fails to be matched with the preset torsion-pressure ratio range, the clutch can be judged to be failed in the test result of the clutch test, and the current clutch is in an abnormal working state, so that the clutch needs to be processed to ensure the safety of driving the vehicle to be tested.
In the embodiment of the invention, the pressure value of the clutch of the vehicle to be tested is obtained, the corresponding torque value is obtained through the pressure value, the ratio of the torque value to the pressure value is calculated to determine the target torque-to-pressure ratio of the clutch, the target torque-to-pressure ratio is matched with the preset torque-to-pressure ratio range obtained before the test, whether the target torque-to-pressure ratio is successfully matched with the preset torque-to-pressure ratio is determined, and whether the test of the clutch in the vehicle to be tested passes is determined. Whether the test result is normal or not is judged according to the matching of the test result and the preset torque ratio range obtained according to the test instruction, the judgment can be carried out by relying on abundant experience of workers when the manual clutch troubleshooting is carried out, the manual troubleshooting takes a long time, and the troubleshooting is low in efficiency, so that the troubleshooting efficiency of the vehicle clutch is improved, and the detection of the function of the clutch is more intelligent.
Further, a second embodiment of the clutch detection method according to the present invention is proposed based on the first embodiment of the present invention, and in this embodiment, the step S200 of the embodiment, which is a refinement of the step of determining the torque-to-pressure ratio of the clutch according to the pressure value and the torque value, includes:
step a: if a plurality of groups of pressure values and a plurality of groups of torque values exist, calculating a pressure difference value corresponding to each pressure value, and calculating a torque difference value corresponding to each torque value;
the method for determining the torque-to-pressure ratio of the clutch can be determined by calculating the ratio of a single set of torque values to pressure values, or by calculating the average value of the ratios of multiple sets of torque values to pressure values, or by calculating the average value of the ratios of the differences between two sets of single torque values and the differences between two sets of single pressure values corresponding to the difference between two sets of single torque values, or the like, and the torque ratio of the clutch can be determined by using the torque values of the clutch and the pressure values of the clutch. In this embodiment, when there are a plurality of sets of pressure values of the clutch and a plurality of sets of torque values of the clutch, a corresponding pressure difference value between the pressure values of the clutch is calculated, the corresponding pressure difference value may be calculated by performing difference calculation on two corresponding sets of randomly extracted pressure values in the pressure values of the plurality of sets of clutches, or may be calculated by performing difference calculation on two corresponding sets of adjacent pressure values that are sorted when the pressure values of the plurality of sets of clutches are sorted according to a magnitude order. And correspondingly calculating the difference value of the torque value corresponding to the pressure value utilized when the pressure difference value is calculated according to the pressure difference value calculation mode. When only one set of pressure value and torque value exists, the ratio of the torque value to the pressure value is calculated and is used as a target torque-pressure ratio.
Step b: traversing each pressure difference value, and determining a determined torque difference value corresponding to the traversed pressure difference value according to each torque difference value;
after a plurality of groups of pressure difference values and a plurality of groups of torque difference values are calculated, traversing each pressure difference value, and determining the torque difference value corresponding to each pressure difference value in the plurality of groups of torque difference values one by one. Traversing each pressure difference value means that each pressure difference value in the plurality of groups of pressure difference values is visited once in turn. For example, when four sets of data are available, when pressure values of the clutches are acquired as 3bar, 3.5bar, 4bar, and 4.5bar, torque values Tq1, Tq2, Tq3, and Tq4 are obtained in one-to-one correspondence with the pressure values. Three groups of pressure difference values (3.5-3), (4-3.5) and (4.5-4) and three groups of torque difference values corresponding to the pressure difference values can be respectively obtained: (Tq2-Tq1), (Tq3-Tq2), and (Tq4-Tq 3).
Step c: calculating a ratio of the determined torque difference and the traversed pressure difference;
and after the torque difference value corresponding to each traversed pressure difference value is determined, calculating the ratio of each group of torque difference values to the pressure difference value corresponding to the torque difference value. For example, when four sets of data are available, when pressure values of the clutches are acquired as 3bar, 3.5bar, 4bar, and 4.5bar, torque values Tq1, Tq2, Tq3, and Tq4 are obtained in one-to-one correspondence with the pressure values. The corresponding obtained ratios are (Tq2-Tq1)/0.5, (Tq3-Tq2)/0.5, (Tq4-Tq3)/0.5 respectively.
Step d: and calculating the average value of the ratio corresponding to each pressure difference value, and taking the average value as the target torque-to-pressure ratio of the clutch.
When the pressure values of the multiple groups of clutches and the torque values of the multiple groups of clutches exist, the ratio of the torque difference value to the pressure difference value corresponding to the torque difference value also exists in multiple groups, the multiple groups of ratios are obtained, the average value of the multiple groups of ratios is calculated, and the calculated average value of the multiple groups of ratios is used as the torque-to-pressure ratio of the clutches in the vehicle to be tested. For example, when four sets of data are available, when pressure values of the clutch are acquired as 3bar, 3.5bar, 4bar and 4.5bar, torque values Tq1, Tq2, Tq3 and Tq4 which correspond to the pressure values one by one, and the torque-to-pressure ratio is [ (Tq2-Tq1)/0.5+ (Tq3-Tq2)/0.5+ (Tq4-Tq3)/0.5 ]/3.
In the embodiment, the difference value calculation is carried out by adopting the pressure values of the multiple groups of clutches and the torque values of the clutches, so that the contingency of data is reduced, the average value calculation is carried out after the ratios of the multiple groups of torque values and the pressure values are obtained, the error is reduced, and the accuracy and the stability of the calculation result are ensured.
Specifically, the step of calculating the pressure difference value corresponding to each pressure value includes:
step e: and traversing each pressure value in sequence, determining an adjacent pressure value adjacent to the traversed pressure value, calculating a first difference value between the adjacent pressure value and the traversed pressure value, and taking the first difference value as a pressure difference value corresponding to the traversed pressure value.
In this embodiment, the test instruction may include a plurality of test instructions for setting a pressure value of the clutch, and the test instruction sets the pressure value of the clutch differently. And when the test instruction is a test instruction for setting the pressure value of the clutch, the test instruction sends a UDS instruction for setting the pressure value of the clutch to the TCU, and the pressure value of the clutch is set. The test instruction can be sent in a single time or sent for multiple times, and the pressure value corresponding to the test instruction is acquired by each sending. For example, three test instructions are sent to the TCU: the first time UDS command 2F 03D 134012C was sent, setting the set clutch pressure to 3 bar. The second time UDS command 2F 03D 134015E was sent, setting the set clutch pressure to 3.5 bar. The third time UDS command 2F 03D 1350190 was sent, setting the set clutch pressure to 4 bar. The clutch detection system acquires all pressure values, traverses all the acquired pressure values, determines the adjacent pressure value of the current pressure value which is being traversed, and calculates the difference value between the adjacent pressure value and the current pressure value, wherein the difference value is the first difference value. And taking the first difference value as the pressure difference value corresponding to the current pressure value being traversed. For example, if the obtained pressure values are 3bar, 3.5bar, and 4bar, and the current pressure value being traversed is 3bar, the adjacent pressure value is 3.5bar, the first difference value is (3.5-3), that is, 0.5, and the first difference value 0.5 is taken as the pressure difference value corresponding to the current pressure value of 3 bar.
In the embodiment, the pressure values of the multiple groups of clutches are adopted for calculating the difference value, so that the contingency of data is reduced, errors are reduced, and the accuracy and the stability of the calculation result are ensured.
Specifically, the step of calculating the torque difference value corresponding to each torque value includes:
step f: and traversing each torque value in sequence, determining adjacent torque values adjacent to the traversed torque value, calculating a second difference value between the adjacent torque values and the traversed torque value, and taking the second difference value as a torque difference value corresponding to the traversed torque value.
In the present embodiment, the torque value is the engine transmission torque, and after the pressure value of the clutch is set, the engine transmission torque at the pressure value needs to be acquired, that is, the torque value in the present embodiment. The torque values correspond to the pressure values one by one, and the clutch detection system acquires the torque value corresponding to each pressure value. When there are multiple sets of pressure values, there are multiple sets of torque values. And reading the torque value corresponding to each pressure value through the test instruction. For example, a read command is issued to the TCU: acquiring a torque value when the pressure value is 3bar, sending a UDS command 22D 023, and reading and recording engine transmission torque Tq 1; acquiring a torque value when the pressure value is 3.5bar, sending a UDS command 22D 023, and reading and recording engine transmission torque Tq 2; the torque value at 4bar is obtained, the UDS command 22D 023 is sent, and the engine transfer torque Tq3 is read and recorded. The clutch detection system acquires all torque values, sequentially traverses all the acquired torque values, determines an adjacent torque value of the current torque value being traversed, and calculates a difference value between the adjacent torque value and the current torque value, wherein the difference value is a second difference value. And taking the second difference value as the torque difference value corresponding to the current torque value being traversed. For example, the obtained torque values are Tq1, Tq2 and Tq3, the current torque value being traversed is Tq1, the adjacent torque value is Tq2, the first difference value is (Tq2-Tq1), and the first difference value (Tq2-Tq1) is taken as the torque difference value corresponding to the current torque value Tq 1.
In the embodiment, the difference value calculation is carried out by adopting the torque values of the plurality of groups of clutches, so that the contingency of data is reduced, the error is reduced, and the accuracy and the stability of the calculation result are ensured.
Further, the step of obtaining a pressure value corresponding to the clutch according to the test instruction and reading a torque value corresponding to the pressure value includes:
step g: acquiring a first pressure value of the clutch according to the test instruction, reading a first torque value corresponding to the first pressure value, taking the first pressure value as a pressure value, and taking the first torque value as a torque value;
in this embodiment, the test command may be a UDS command that is sent to the TCU and sets a pressure value of the clutch, where the pressure value is used as the first pressure value. And after the first pressure value is acquired, sending a reading instruction to the TCU, reading the engine transmission torque corresponding to the first pressure value, and taking the engine transmission torque as a first torque value. And taking the first pressure value as a pressure value and the first torque value as a torque value. For example, the UDS command 2F 03D 134012C is sent to the TCU, the set clutch pressure is set to 3bar, the UDS command 22D 023 is sent to the TCU, and the engine transfer torque Tq1 is read and recorded.
Specifically, the step of determining the target torque-to-pressure ratio of the clutch according to the pressure value and the torque value includes:
step h: and calculating a first ratio between the first torque value and the first pressure value, and taking the first ratio as a target torque-to-pressure ratio of the clutch.
And calculating a first ratio between the acquired first torque value and the acquired first pressure value, wherein the first ratio is a ratio corresponding to the first torque value and the first pressure value, and the first ratio is used as a target torque-pressure ratio of the clutch. For example, if the first pressure value is 3bar and the first torque value is Tq1, the target torque ratio of the clutch is Tq 1/3.
In the embodiment, the ratio between the single group of pressure values and the torque value is used as the torque-to-pressure ratio of the clutch, so that the test result can be quickly obtained, and the efficiency of troubleshooting the vehicle clutch is improved.
Further, the step of obtaining a pressure value corresponding to the clutch according to the test instruction and reading a torque value corresponding to the pressure value includes:
step i: and acquiring a pressure value corresponding to the clutch according to the test instruction, and reading a torque value corresponding to the pressure value according to a preset time length.
In this embodiment, after the UDS instruction is sent to the TCU to set the pressure value corresponding to the clutch of the vehicle to be tested, the pressure value is obtained. For example, a UDS command 2F 03D 134012C is sent, and the clutch pressure is set to 3bar, and the pressure value obtained at this time is 3 bar. Presetting a time length which is a time interval between torque values corresponding to the pressure value after the pressure value of the clutch is set. Based on the time interval, after setting the pressure value of the clutch, a preset time period is waited, and then a torque value corresponding to the pressure value is read. For example, if the preset time period is 1000ms, the UDS command 22D 023 is sent after the clutch pressure is set for 1000ms, and the engine transfer torque Tq1 is read and recorded.
In this embodiment, the torque value is obtained after the interval preset time, pressure can be relatively stable, and the corresponding torque value is obtained after the clutch works for a certain time under the pressure, so that the error of the torque value can be reduced, the obtained torque value has timeliness, and the accuracy of a test result is improved.
Further, the target torque-to-pressure ratio comprises an inner clutch torque-to-pressure ratio and an outer clutch torque-to-pressure ratio; if the target torsion-pressure ratio is matched with the preset torsion-pressure ratio range, before the step of determining that the test result of the clutch test is that the test passes, the method comprises the following steps:
step j: determining an inner torsion-pressure ratio range corresponding to the inner clutch torsion-pressure ratio based on a preset torsion-pressure ratio range, and detecting whether the inner clutch torsion-pressure ratio is within the inner torsion-pressure ratio range;
in this embodiment, the clutches may be dual clutches including inner and outer clutches. The target torsion-pressure ratio refers to a ratio of a torque corresponding to the clutch under the current pressure to the pressure, and when the clutch is a dual clutch, the target torsion-pressure ratio includes an inner clutch torsion-pressure ratio and an outer clutch torsion-pressure ratio. The preset torsion ratio range refers to a range standard of a torsion ratio predetermined before a test, and in this embodiment, the preset torsion ratio range is an optimal range of a clutch torsion ratio that ensures vehicle driving safety and is obtained according to specific working conditions after a large number of test bed tests are performed by technicians, and the optimal range is used as the preset torsion ratio range of this embodiment. Wherein, the outer torque ratio scope that the outer clutch based on predetermineeing the torque ratio scope corresponds is: 32.5 + -10% Nm/bar; the corresponding preset torsion-pressure ratio range of the inner clutch based on the preset torsion-pressure ratio range, namely the inner torsion-pressure ratio range, is as follows: 43.5. + -. 10% Nm/bar. And after the internal clutch torsion-pressure ratio corresponding to the internal clutch is obtained through calculation, comparing the internal clutch torsion-pressure ratio with the internal torsion-pressure ratio range, and judging whether the internal clutch torsion-pressure ratio is within the internal torsion-pressure ratio range. The internal clutch test procedure is described with reference to fig. 3.
Step k: and if the torque-to-pressure ratio of the inner clutch is within the range of the inner torque-to-pressure ratio, determining whether the target torque-to-pressure ratio is matched with a preset torque-to-pressure ratio range or not based on the torque-to-pressure ratio of the outer clutch.
And comparing the torsion-pressure ratio of the inner clutch with the inner torsion-pressure ratio range, and determining whether the target torsion-pressure ratio is matched with the preset torsion-pressure ratio range according to whether the torsion-pressure ratio of the outer clutch is matched with the preset torsion-pressure ratio range or not when the torsion-pressure ratio of the inner clutch is within the inner torsion-pressure ratio range. When the torque-to-pressure ratio of the inner clutch is out of the range of the torque-to-pressure ratio, it can be determined that the target torque-to-pressure ratio does not match the range of the preset torque-to-pressure ratio, and the inner clutch may malfunction.
In this embodiment, when the clutch is the double clutch, detect respectively to interior clutch and outer clutch in the double clutch, reachd testing result, can accurately judge whether there is the trouble in the clutch, when there is the trouble, can pinpoint the fault location and be interior clutch or outer clutch, promoted the investigation efficiency of the vehicle trouble problem that leads to because of the clutch factor for the detection to the clutch function is more intelligent.
Further, the step of determining whether the target torque to pressure ratio matches a preset torque to pressure ratio range based on the outer clutch torque to pressure ratio comprises:
step l: determining an outer torsion-pressure ratio range corresponding to the outer clutch torsion-pressure ratio range based on a preset torsion-pressure ratio range, and detecting whether the outer clutch torsion-pressure ratio is within the outer torsion-pressure ratio range;
in this embodiment, the preset torsion-pressure ratio range is an optimal range of the clutch torsion-pressure ratio, which is obtained according to specific working conditions after a lot of test bed tests are performed by technicians, for ensuring the driving safety of the vehicle, and the optimal range is used as the preset torsion-pressure ratio range of this embodiment. Wherein, the outer torque ratio scope that the outer clutch based on predetermineeing the torque ratio scope corresponds is: 32.5 + -10% Nm/bar; the corresponding preset torsion-pressure ratio range of the inner clutch based on the preset torsion-pressure ratio range, namely the inner torsion-pressure ratio range, is as follows: 43.5. + -. 10% Nm/bar. And when the torsion-pressure ratio of the inner clutch is determined to be within the inner torsion-pressure ratio range by comparing the torsion-pressure ratio of the inner clutch with the inner torsion-pressure ratio range, determining an outer torsion-pressure ratio range corresponding to a preset torsion-pressure ratio range. And comparing the torque-to-pressure ratio of the outer clutch with the range of the torque-to-pressure ratio of the outer clutch, and judging whether the torque-to-pressure ratio of the outer clutch is within the range of the torque-to-pressure ratio of the outer clutch. The external clutch test procedure refers to fig. 4.
Step m: determining whether the target torque-to-pressure ratio is matched with a preset torque-to-pressure ratio range according to a detection result of detecting whether the torque-to-pressure ratio of the outer clutch is within the range of the outer torque-to-pressure ratio;
and comparing the torque-to-pressure ratio of the outer clutch with the torque-to-pressure ratio range of the outer clutch, if the torque-to-pressure ratio of the outer clutch is within the torque-to-pressure ratio range of the outer clutch, determining that the torque-to-pressure ratio detection result of the outer clutch passes, and when the torque-to-pressure ratio detection result of the outer clutch passes, determining that the target torque-to-pressure ratio is successfully matched with the preset torque-to-pressure ratio range. The test result of the clutch test is that the test is passed. And if the torque-to-pressure ratio of the external clutch is out of the range of the torque-to-pressure ratio, determining that the detection result of the torque-to-pressure ratio of the external clutch does not pass, and when the detection result of the torque-to-pressure ratio of the external clutch does not pass, determining that the target torque-to-pressure ratio is not matched with the range of the preset torque-to-pressure ratio, thereby determining that the test result of the clutch test is that the test does not pass, and possibly causing a fault in the external clutch at the moment.
In another embodiment, whether the target torque-to-pressure ratio matches the preset torque-to-pressure ratio range may also be determined by preferentially determining whether the torque-to-pressure ratio of the outer clutch is within the range of the outer torque-to-pressure ratio, further determining whether the torque-to-pressure ratio of the inner clutch is within the range of the inner torque-to-pressure ratio when the torque-to-pressure ratio of the outer clutch is within the range of the outer torque-to-pressure ratio, and determining that the target torque-to-pressure ratio matches the preset torque-to-pressure ratio range when the torque-to-pressure ratio of the inner clutch is within the range of the inner torque-to-pressure ratio, thereby determining that the test result of the clutch test is a pass test. The torque-to-pressure ratio of the outer clutch is determined to be within the range of the torque-to-pressure ratio of the outer clutch and the torque-to-pressure ratio of the inner clutch is determined to be within the range of the torque-to-pressure ratio of the inner clutch, when the torque-to-pressure ratio of the inner clutch is within the range of the torque-to-pressure ratio of the inner clutch and the torque-to-pressure ratio of the outer clutch is within the range of the torque-to-pressure ratio of the outer clutch, the target torque-to-pressure ratio is determined to be matched with the preset torque-to-pressure ratio range, the test result of the clutch test is determined to be passed, and if any one of the torque-to-pressure ratio of the inner clutch and the torque-to-pressure ratio of the outer clutch is not within the range of the torque-to-pressure ratio of the outer clutch exists, the test result of the clutch test is determined to be failed.
In this embodiment, when the clutch is the double clutch, detect respectively to interior clutch and outer clutch in the double clutch, reachd testing result, can accurately judge whether there is the trouble in the clutch, when there is the trouble, can pinpoint the fault location and be interior clutch or outer clutch, promoted the investigation efficiency of the vehicle trouble problem that leads to because of the clutch factor for the detection to the clutch function is more intelligent.
Further, before the step of obtaining a pressure value corresponding to the clutch according to the test instruction and reading a torque value corresponding to the pressure value, the method further includes:
step n: controlling the working state of the vehicle to be tested to enter a test state from a default state according to the test instruction;
step o: and determining the pressure value of the clutch in the vehicle to be tested in the test state.
In this embodiment, the test instruction may be an instruction for setting a state of the vehicle to be tested before setting the clutch pressure value, where the instruction is a UDS instruction, and the vehicle to be tested is controlled to enter the test state from the default state by sending the UDS instruction to the TCU. And after the vehicle to be tested is confirmed to be in the test state, starting to test the function of the clutch, and acquiring the pressure value of the clutch in the vehicle to be tested. The default state of the vehicle to be tested is the state of the vehicle to be tested before the test is started, and comprises the gear state of a gearbox of the vehicle to be tested, the cooling flow of a clutch and the like. In this embodiment, the clutch is connected to the transmission, and after the state setting command is triggered, a UDS command is sent to the TCU, all gears are opened, and the transmission is put into neutral, for example, UDS command 2E 106001 is sent, the clutch pressure in the transmission is reduced to 100kPa, and 4 shift forks are retracted to the neutral position, that is, the neutral position.
In this embodiment, the clutch includes an inner clutch and an outer clutch, wherein the inner clutch transmits even gears, such as 2, 4, and 6 gears; the outer clutch transmits odd gears, e.g., 1, 3, 5. After the transmission is set, sending a UDS command to the TCU according to a state setting command for the inner clutch so that the inner clutch enters a test working condition, for example, sending a UDS command 3101C 00E 02, setting a gear of a gearbox to be engaged in a gear 2, sending a UDS command 2F 03D 00B 00, and setting the cooling flow of the clutch to be 20L/min; and aiming at the external clutch, sending a UDS command to the TCU according to a state setting command, so that the external clutch enters a test working condition, for example, sending a UDS command 3101C 00D 01, setting a gear of a gearbox to be shifted into a 1 gear, sending a UDS command 2F 03D 00B 00, and setting the cooling flow of the clutch to be 20L/min.
Before setting the working state of the vehicle to be tested, setting the working condition of the vehicle to be tested, and setting the vehicle to be tested to be in a flat road; the transmitter is set to idle, for example, 800rpm, wherein idle is an operating condition of the vehicle, meaning that the engine is running in a neutral condition. The speed at which the engine idles is referred to as an idle speed. The idling speed can be adjusted by adjusting the size of a throttle and the like. The shift handle is placed in the P-position and the handbrake or EPB (Electrical Park Brake system) is tightened. And setting the working state of the vehicle to be tested after the working condition of the vehicle to be tested is set.
In this embodiment, the operating mode to the vehicle that awaits measuring to and the operating condition of the vehicle that awaits measuring sets up, can get rid of other factor interferences, reduce the test variable, promote the accuracy that detects clutch in to the vehicle that awaits measuring, thereby promote the efficiency to vehicle clutch troubleshooting.
In addition, the invention also provides a computer readable storage medium, on which the clutch detection program is stored. The computer-readable storage medium may be the Memory 20 in the terminal of fig. 1, and may also be at least one of a ROM (Read-Only Memory)/RAM (Random Access Memory), a magnetic disk, and an optical disk, and the computer-readable storage medium includes instructions for causing a vehicle having a processor to execute the clutch detection method according to the embodiments of the present invention.
It is to be understood that throughout the description of the present specification, reference to the term "one embodiment", "another embodiment", "other embodiments", or "first through nth embodiments", etc., is intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
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.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. 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 (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A clutch detection method is applied to a vehicle to be detected and comprises the following steps:
when a test instruction for testing the clutch in the vehicle to be tested is triggered, acquiring a pressure value corresponding to the clutch according to the test instruction, and reading a torque value corresponding to the pressure value;
determining a target torque-to-pressure ratio of the clutch according to the pressure value and the torque value;
and if the target torsion-pressure ratio is matched with the preset torsion-pressure ratio range, determining that the test result of the clutch test is that the test is passed.
2. The clutch detection method of claim 1, wherein the step of determining the target torque-to-pressure ratio of the clutch based on the pressure value and the torque value comprises:
if a plurality of groups of pressure values and a plurality of groups of torque values exist, calculating a pressure difference value corresponding to each pressure value, and calculating a torque difference value corresponding to each torque value;
traversing each pressure difference value, and determining a determined torque difference value corresponding to the traversed pressure difference value according to each torque difference value;
calculating a ratio of the determined torque difference and the traversed pressure difference;
and calculating the average value of the ratio corresponding to each pressure difference value, and taking the average value as the target torque-to-pressure ratio of the clutch.
3. The method of claim 2, wherein the step of calculating the pressure differential value for each of the pressure values comprises:
and traversing each pressure value in sequence, determining an adjacent pressure value adjacent to the traversed pressure value, calculating a first difference value between the adjacent pressure value and the traversed pressure value, and taking the first difference value as a pressure difference value corresponding to the traversed pressure value.
4. The clutch detection method of claim 2, wherein said step of calculating a torque difference value for each of said torque values comprises:
and traversing each torque value in sequence, determining adjacent torque values adjacent to the traversed torque value, calculating a second difference value between the adjacent torque values and the traversed torque value, and taking the second difference value as a torque difference value corresponding to the traversed torque value.
5. The method for detecting the clutch according to claim 1, wherein the step of obtaining a pressure value corresponding to the clutch according to the test command and reading a torque value corresponding to the pressure value comprises:
acquiring a first pressure value of the clutch according to the test instruction, reading a first torque value corresponding to the first pressure value, taking the first pressure value as a pressure value, and taking the first torque value as a torque value;
the step of determining a target torque to pressure ratio of the clutch from the pressure value and the torque value comprises:
and calculating a first ratio between the first torque value and the first pressure value, and taking the first ratio as a target torque-to-pressure ratio of the clutch.
6. The clutch test method of claim 1, wherein the target torque ratio comprises an inner clutch torque ratio and an outer clutch torque ratio, and wherein the step of determining that the test result of the clutch test is a pass test if the target torque ratio matches a preset torque ratio range comprises, before the step of:
determining an inner torsion-pressure ratio range corresponding to the inner clutch torsion-pressure ratio based on a preset torsion-pressure ratio range, and detecting whether the inner clutch torsion-pressure ratio is within the inner torsion-pressure ratio range;
and if the torque-to-pressure ratio of the inner clutch is within the range of the inner torque-to-pressure ratio, determining whether the target torque-to-pressure ratio is matched with a preset torque-to-pressure ratio range or not based on the torque-to-pressure ratio of the outer clutch.
7. The clutch detection method of claim 6, wherein the step of determining whether the target torque ratio matches a preset torque ratio range based on the outer clutch torque ratio comprises:
determining an outer torsion-pressure ratio range corresponding to the outer clutch torsion-pressure ratio range based on a preset torsion-pressure ratio range, and detecting whether the outer clutch torsion-pressure ratio is within the outer torsion-pressure ratio range;
and determining whether the target torsion-pressure ratio is matched with a preset torsion-pressure ratio range according to a detection result of whether the torsion-pressure ratio of the outer clutch is detected to be within the outer torsion-pressure ratio range.
8. The clutch detection method according to any one of claims 1 to 7, wherein before the step of obtaining a pressure value corresponding to the clutch according to the test command and reading a torque value corresponding to the pressure value, the method further comprises:
controlling the working state of the vehicle to be tested to enter a test state from a default state according to the test instruction;
and determining the pressure value of the clutch in the vehicle to be tested in the test state.
9. A vehicle comprising a memory, a processor, and a clutch detection program stored on the memory and operable on the processor, wherein: the clutch detection program when executed by the processor implements the steps of the clutch detection method according to any one of claims 1 to 8.
10. A computer-readable storage medium, characterized in that a clutch detection program is stored thereon, which when executed by a processor implements the steps of the clutch detection method according to any one of claims 1 to 8.
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