A test method and related equipment for obtaining the highest oil temperature of a gearbox

Abstract

The present invention provides a test method and related equipment for obtaining the highest oil temperature of a gearbox. The method includes: obtaining the oil temperature value of the vehicle's gearbox; intercepting the interval segment of the gearbox oil temperature value, and using the maximum oil temperature value in the intercepted multiple interval segments as the first highest oil temperature value of the gearbox; obtaining the first test duration for the vehicle to complete one test in the set test condition and the second test duration for the gearbox oil temperature to reach the first highest oil temperature value from the initial value; obtaining the number of tests for the vehicle in the set test condition according to the first test duration and the second test duration; repeating the step of controlling the vehicle to which the gearbox belongs to run according to the set test condition for the number of tests to obtain a preliminary highest oil temperature value of the gearbox; after reaching the preset number of times, calculating the highest oil temperature value of the gearbox from the multiple preliminary highest oil temperature values of the gearbox. Through the present invention, the problems that the method for obtaining the highest oil temperature of the gearbox has time limitations and high costs are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle verification, and in particular to a test method for obtaining the maximum oil temperature of a gearbox and related equipment. Background Art

[0002] The gearbox is a crucial component in the automotive transmission system, and gearbox oil temperature is a significant factor affecting its service life. Excessively high gearbox oil temperature can reduce the oil's lubrication properties, lead to clutch erosion, and cause gear-shaft scuffing failure. Therefore, it's important to determine the maximum gearbox oil temperature. If it exceeds the vehicle's maximum allowable oil temperature, adjust the gearbox or vehicle parameters to keep the maximum oil temperature equal to or below the vehicle's maximum allowable temperature. This can address issues such as reduced lubrication, clutch erosion, and gear-shaft scuffing caused by excessively high gearbox oil temperature.

[0003] The existing method for determining the maximum transmission oil temperature primarily involves conducting full-vehicle road endurance tests under high summer temperatures, particularly in mountainous areas. The transmission oil temperature signal is then read from the test data to determine the maximum transmission oil temperature. However, this method is time-sensitive; the tests must be conducted during high summer temperatures, often failing to meet the design timeframe. Furthermore, improving the vehicle's heat dissipation performance requires verifying the reduction in the maximum transmission oil temperature through full-vehicle road testing, which is costly. Summary of the Invention

[0004] The main purpose of the present invention is to provide a method, device, equipment and readable storage medium for obtaining the maximum oil temperature of a transmission, aiming to solve the problem in the prior art that the method for obtaining the maximum oil temperature of a transmission is time-limited and costly.

[0005] In a first aspect, the present invention provides a test method for obtaining the maximum oil temperature of a transmission, the test method for obtaining the maximum oil temperature of the transmission comprising:

[0006] Obtain the transmission oil temperature of a vehicle from the starting point to the end point under specified mountain conditions;

[0007] Intercepting an interval in which the transmission oil temperature value continuously rises to a maximum oil temperature value, and taking the maximum oil temperature value among the intercepted multiple intervals as a first maximum oil temperature value of the transmission;

[0008] Obtaining a first test duration for a vehicle to complete a test under a set test condition and a second test duration for the transmission oil temperature to increase from an initial value to a first maximum oil temperature value;

[0009] Calculate the number of tests of the vehicle in the set test condition according to the first test duration and the second test duration;

[0010] Control the vehicle to which the gearbox belongs to operate according to the set test conditions for the number of tests, and obtain a preliminary maximum oil temperature value of the gearbox;

[0011] Repeat the step of controlling the vehicle to which the gearbox belongs to operate according to the set test conditions for the number of tests to obtain a preliminary maximum oil temperature value of the gearbox;

[0012] After reaching the preset number of times, calculate the maximum oil temperature value of the gearbox from multiple preliminary maximum oil temperature values of the gearbox.

[0013] Optionally, before the step of obtaining the first test duration for the vehicle to complete one test under the set test conditions and the second test duration for the oil temperature of the gearbox to rise from the initial value to the first maximum oil temperature value, it includes:

[0014] Set the test conditions according to the obtained vehicle's overall vehicle data from the driving starting point to the driving ending point under the specified mountainous area conditions, where the overall vehicle data includes slope, vehicle speed, vehicle acceleration, and vehicle deceleration.

[0015] Optionally, the step of calculating the number of tests for the vehicle under the set test conditions according to the first test duration and the second test duration includes:

[0016] Substitute the first test duration and the second test duration into the first preset formula to calculate the number of tests for the vehicle under the set test conditions. The first preset formula is as follows:

[0017]

[0018] where n is the number of tests for the vehicle under the set test conditions, T c is the first test duration, and t is the second test duration.

[0019] Optionally, the step of calculating the maximum oil temperature value of the gearbox from multiple preliminary maximum oil temperature values of the gearbox includes:

[0020] Substitute multiple preliminary maximum oil temperature values of the gearbox into the second preset formula to calculate the maximum oil temperature value of the gearbox. The second preset formula is as follows:

[0021] T max = max(T test1 , T test2 ,......, T testK )

[0022] where T max is the maximum oil temperature value of the gearbox, and T test1 , T test2 ,......, T testKare multiple initial maximum oil temperature values of the gearbox.

[0023] Optionally, after the step of calculating the maximum oil temperature value of the gearbox from the multiple preliminary maximum oil temperature values of the gearbox, the method further includes:

[0024] Compare the maximum oil temperature of the gearbox with the maximum oil temperature calibrated for the vehicle system;

[0025] If the maximum oil temperature of the transmission is greater than the maximum oil temperature calibrated by the vehicle system, an alarm will be generated.

[0026] In a second aspect, the present invention further provides a test device for obtaining the maximum oil temperature of a gearbox, the test device for obtaining the maximum oil temperature of the gearbox comprising:

[0027] The first acquisition module is used to obtain the transmission oil temperature value of the vehicle from the starting point to the end point of the journey under a specified mountainous operating condition;

[0028] an interception module, configured to intercept an interval in which the transmission oil temperature value continuously rises to a maximum oil temperature value, and use the maximum oil temperature value among the intercepted multiple intervals as a first maximum oil temperature value of the transmission;

[0029] The second acquisition module is used to obtain a first test time for the vehicle to complete a test in a set test condition and a second test time for the transmission oil temperature to increase from an initial value to a first maximum oil temperature value;

[0030] A first calculation module is used to calculate the number of tests of the vehicle in the set test condition according to the first test duration and the second test duration;

[0031] A control module is used to control the vehicle to which the transmission belongs to run the test number according to the set test conditions to obtain a preliminary maximum oil temperature value of the transmission;

[0032] An execution module, configured to repeat the step of controlling the vehicle to which the transmission belongs to run the test number of times according to a set test condition to obtain a preliminary maximum oil temperature value of the transmission;

[0033] The second calculation module is used to calculate the maximum oil temperature value of the gearbox from multiple preliminary maximum oil temperature values of the gearbox after reaching a preset number of times.

[0034] Optionally, the first calculation module is configured to:

[0035] Substitute the first test duration and the second test duration into the first preset formula to calculate the number of tests of the vehicle in the set test condition. The first preset formula is as follows:

[0036]

[0037] where n is the number of tests of the vehicle under the set test conditions, and T c is the first test duration, and t is the second test duration.

[0038] Optionally, the test device for obtaining the highest oil temperature of the transmission further includes a comparison module, which is used for:

[0039] comparing the highest oil temperature value of the transmission with the highest oil temperature value calibrated by the vehicle system;

[0040] if the highest oil temperature value of the transmission is greater than the highest oil temperature value calibrated by the vehicle system, an alarm prompt is generated.

[0041] In a third aspect, the present invention further provides a test device for obtaining the highest oil temperature of the transmission. The test device for obtaining the highest oil temperature of the transmission includes a processor, a memory, and a test program for obtaining the highest oil temperature of the transmission stored on the memory and executable by the processor. When the test program for obtaining the highest oil temperature of the transmission is executed by the processor, the steps of the test method for obtaining the highest oil temperature of the transmission as described above are implemented.

[0042] In a fourth aspect, the present invention further provides a readable storage medium. A test program for obtaining the highest oil temperature of the transmission is stored on the readable storage medium. When the test program for obtaining the highest oil temperature of the transmission is executed by a processor, the steps of the test method for obtaining the highest oil temperature of the transmission as described above are implemented.

[0043] In the present invention, the transmission oil temperature value of a vehicle from the driving starting point to the driving ending point under a specified mountainous working condition is obtained; an interval section during which the transmission oil temperature value continuously rises to the highest oil temperature value is intercepted, and the maximum oil temperature value among the intercepted multiple interval sections is used as the first highest transmission oil temperature value; the first test duration for the vehicle to complete one test in a set test working condition and the second test duration for the transmission oil temperature to rise from the initial value to the first highest oil temperature value are obtained; the number of tests of the vehicle in the set test working condition is calculated based on the first test duration and the second test duration; the vehicle to which the transmission belongs is controlled to operate according to the set test working condition for the number of tests to obtain a preliminary highest oil temperature value of the transmission; the step of controlling the vehicle to which the transmission belongs to operate according to the set test working condition for the number of tests to obtain a preliminary highest oil temperature value of the transmission is repeated; after reaching a preset number of times, the highest oil temperature value of the transmission is calculated from the multiple preliminary highest oil temperature values of the transmission. Through the present invention, the test working condition is set according to the vehicle's overall data from the driving starting point to the driving ending point under the specified mountainous working condition. By controlling the vehicle to which the transmission belongs to operate according to the set test working condition for a certain number of tests, the highest oil temperature value of the transmission can be obtained, without waiting for the whole vehicle test in summer high temperature, which can fully meet the requirements of the design cycle, and greatly reduce the development cost and the consumption of human and material resources, solving the problems in the prior art that the method for obtaining the highest transmission oil temperature has time limitations and high costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic hardware structure diagram of a test device for obtaining the highest transmission oil temperature involved in the solution of an embodiment of the present invention;

[0045] Figure 2 It is a schematic flowchart of the first embodiment of the test method for obtaining the highest transmission oil temperature of the present invention;

[0046] Figure 3 It is a schematic flowchart of the second embodiment of the test method for obtaining the highest transmission oil temperature of the present invention;

[0047] Figure 4 It is a schematic flowchart of the third embodiment of the test method for obtaining the highest transmission oil temperature of the present invention;

[0048] Figure 5 It is a schematic functional module diagram of an embodiment of the test device for obtaining the highest transmission oil temperature of the present invention.

[0049] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0050] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0051] In a first aspect, an embodiment of the present invention provides a test device for obtaining the highest oil temperature of a gearbox.

[0052] Referring to Figure 1 , Figure 1 FIG. is a schematic diagram of the hardware structure of the test device for obtaining the highest oil temperature of the gearbox involved in the solution of the embodiment of the present invention. In the embodiment of the present invention, the test device for obtaining the highest oil temperature of the gearbox may include a processor 1001 (such as a Central Processing Unit, CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components; the user interface 1003 may include a display screen (Display) and an input unit such as a keyboard (Keyboard); the network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a Wireless-FIdelity, WI-FI interface); the memory 1005 may be a high-speed random access memory (random access memory, RAM), or a stable memory (non-volatile memory), such as a disk memory. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001. Those skilled in the art can understand that Figure 1 the hardware structure shown in FIG. does not constitute a limitation to the present invention, and may include more or fewer components than shown in the figure, or combine some components, or have different component arrangements.

[0053] Continuing to refer to Figure 1 , Figure 1 in FIG., the memory 1005, as a computer storage medium, may include an operating system, a network communication module, a user interface module, and a test program for obtaining the highest oil temperature of the gearbox. Among them, the processor 1001 may call the test program for obtaining the highest oil temperature of the gearbox stored in the memory 1005 and execute the test method for obtaining the highest oil temperature of the gearbox provided by the embodiment of the present invention.

[0054] In a second aspect, an embodiment of the present invention provides a test method for obtaining the highest oil temperature of a gearbox.

[0055] In one embodiment, referring to Figure 2 , Figure 2 FIG. is a schematic flowchart of the first embodiment of the test method for obtaining the highest oil temperature of the gearbox according to the present invention. As shown in Figure 2 FIG., the test method for obtaining the highest oil temperature of the gearbox includes:

[0056] Step S10: Obtain the oil temperature value of the gearbox from the driving starting point to the driving ending point under the specified mountain working condition of the vehicle;

[0057] In this embodiment, the transmission oil temperature value of the vehicle from the starting point to the end point of the journey under the specified mountainous operating conditions is obtained through a data acquisition instrument, so as to obtain the first maximum transmission oil temperature value of the vehicle from the starting point to the end point of the journey under the specified mountainous operating conditions through data analysis.

[0058] Step S20, intercepting an interval in which the transmission oil temperature value continuously rises to a maximum oil temperature value, and taking the maximum oil temperature value among the intercepted multiple intervals as a first maximum oil temperature value of the transmission;

[0059] In this embodiment, since the transmission oil temperature value fluctuates during vehicle driving, the interval segment in which the transmission oil temperature value continuously rises to the maximum oil temperature value is intercepted, and multiple interval segments are intercepted. Each interval segment has a maximum oil temperature. The maximum oil temperature value is determined from the multiple oil temperature maximum values corresponding to the multiple intercepted interval segments as the first maximum oil temperature value of the transmission.

[0060] Specifically, the intervals in which the transmission oil temperature value continuously rises to the maximum oil temperature value are the intervals in which the oil temperature rises from 20°C to 50°C, the intervals in which the oil temperature rises from 30°C to 70°C, and the intervals in which the oil temperature rises from 60°C to 98°C. The maximum oil temperature in each interval is 50°C, 70°C and 98°C, respectively. 98°C is the maximum oil temperature value among the multiple oil temperature maximum values corresponding to the multiple intervals intercepted. Therefore, 98°C is taken as the first maximum oil temperature value of the transmission.

[0061] Step S30, obtaining a first test duration for the vehicle to complete a test in a set test condition and a second test duration for the transmission oil temperature to increase from an initial value to a first maximum oil temperature value;

[0062] In this embodiment, the set test conditions include the test environment temperature, vehicle load, initial transmission oil temperature, vehicle air conditioning status, slope, and driving conditions. Within the set test conditions, a vehicle completing one driving condition is considered a complete test. Therefore, the first test duration for a vehicle to complete a test within the set test conditions is the duration for the vehicle to complete one driving condition within the set test conditions. The second test duration for the transmission oil temperature to rise from the initial value to the first maximum oil temperature within the set test conditions is obtained to determine the number of driving conditions completed within the test conditions, i.e., the number of tests performed within the set test conditions.

[0063] Furthermore, in one embodiment, before step S30, the following steps are included:

[0064] Step S003, setting a test condition based on the acquired vehicle data from the driving start point to the driving end point under the specified mountainous condition, wherein the vehicle data includes slope, vehicle speed, vehicle acceleration and vehicle deceleration.

[0065] In this embodiment, with reference to Figure 3 , Figure 3 is a schematic flowchart of the second embodiment of the test method for obtaining the highest oil temperature of the transmission according to the present invention. As Figure 3 shown, according to the obtained vehicle's overall vehicle data from the starting point to the ending point of driving under the specified mountainous working conditions, where the overall vehicle data includes slope, vehicle speed, vehicle acceleration, and vehicle deceleration.

[0066] Obtain the third quartile corresponding to the slope, the third quartile corresponding to the vehicle acceleration, and the third quartile corresponding to the vehicle deceleration of the vehicle from the starting point to the ending point of driving under the specified mountainous working conditions. Among them, the corresponding third quartile is determined according to the position of the third quartile. The formula for obtaining the position of the third quartile is as follows:

[0067] Position of Q3 = (n + 1) * 0.75

[0068] Among them, n is the number of items. Specifically, if the slopes (unit: meters) of the vehicle from the starting point to the ending point of driving under the specified mountainous working conditions are: 6, 5, 4, 5, 4, 5, 6, 7, 8, 9, 8, the result of arranging the slopes in ascending order is: 4, 4, 5, 5, 5, 6, 6, 7, 8, 8, 9. There are a total of 11 items, and the position of Q3 = (11 + 1) × 0.75 = 9, then the third quartile Q3 corresponding to the slope = 8. If the slopes (unit: meters) of the vehicle from the starting point to the ending point of driving under the specified mountainous working conditions are: 6, 5, 5, 7, 8, 9, the result of arranging the slopes in ascending order is: 5, 5, 6, 7, 8, 9. There are a total of 6 items, and the position of Q3 = (6 + 1) × 0.75 = 5.25, then the third quartile Q 3坡度 = 0.25 * 9 + 0.75 * 8 = 8.25. The implementation methods for obtaining the third quartile corresponding to the vehicle acceleration and the third quartile corresponding to the vehicle deceleration are the same as the implementation method for obtaining the third quartile corresponding to the slope of the vehicle from the starting point to the ending point of driving under the specified mountainous working conditions, and will not be elaborated here one by one.

[0069] From the vehicle speeds obtained during the vehicle's journey from the starting point to the ending point under the specified mountain conditions, select the set of vehicle speeds with the most change occurrences as the driving condition in the set test condition. Among them, the vehicle speeds are rounded according to a custom rule. For example, for vehicle speeds between 0 km / h and 5 km / h, 0 km / h is taken; for vehicle speeds between 5 km / h and 15 km / h, 10 km / h is taken; for vehicle speeds between 15 km / h and 25 km / h, 20 km / h is taken, to avoid data redundancy. Specifically, during the vehicle's journey from the starting point to the ending point under the specified mountain conditions, if the speed change process is from 0 km / h to 30 km / h, then drive at a constant speed of 30 km / h for t1 s, then accelerate from 30 km / h to 45 km / h, drive at a constant speed of 45 km / h for t2 s, then decelerate from 45 km / h to 30 km / h, drive at a constant speed of 30 km / h for t3 s, then accelerate from 30 km / h to 45 km / h, drive at a constant speed of 45 km / h for t4 s, then decelerate from 45 km / h to 30 km / h, drive at a constant speed of 30 km / h for t5 s, then accelerate from 30 km / h to 50 km / h, drive at a constant speed of 50 km / h for t6 s, then decelerate from 50 km / h to 25 km / h, drive at a constant speed of 25 km / h for t7 s, and finally decelerate from 25 km / h to 0 km / h. During the vehicle's journey from the starting point to the ending point under the specified mountain conditions, the vehicle speed accelerates from 30 km / h to 45 km / h and then decelerates from 45 km / h to 30 km / h, and this change occurs twice. The vehicle speed accelerates from 30 km / h to 50 km / h and then decelerates from 50 km / h to 25 km / h, and this change occurs once. The vehicle speed accelerating from 30 km / h to 45 km / h and then decelerating from 45 km / h to 30 km / h is the set of vehicle speeds with the most change occurrences. Therefore, use the vehicle speed accelerating from 30 km / h to 45 km / h and then decelerating from 45 km / h to 30 km / h as the driving condition of the vehicle in the set test condition. Among them, the time for driving at a constant speed of 30 km / h in the set test condition is the average value of the time for driving at a constant speed of 30 km / h during the vehicle's journey from the starting point to the ending point under the specified mountain conditions The time for driving at a constant speed of 45 km / h is the average value of the time for driving at a constant speed of 45 km / h during the vehicle's journey from the starting point to the ending point under the specified mountain conditions

[0070] Specifically, based on the obtained vehicle's complete vehicle data during the vehicle's journey from the starting point to the ending point under the specified mountain conditions, the set test condition is as follows: the vehicle with a full load, the initial value of the transmission oil temperature is 90 °C, the in-vehicle air conditioner is in the off state, the test ambient temperature is T 环境 °C, and the slope is Q 3坡度, the driving condition is that the vehicle speed travels at a constant speed of 30 km / h After that, it accelerates from 30 km / h to 45 km / h and travels at a constant speed of 45 km / h After that, it decelerates from 45 km / h to 30 km / h. Among them, the vehicle speed travels at a constant speed of 30 km / h After that, it accelerates from 30 km / h to 45 km / h and travels at a constant speed of 45 km / h After that, the process of decelerating from 45 km / h to 30 km / h again is to complete one test. The vehicle speed travels at a constant speed of 30 km / h After that, it accelerates from 30 km / h to 45 km / h and travels at a constant speed of 45 km / h After that, the duration of decelerating from 45 km / h to 30 km / h again is the first test duration for the vehicle to complete one test in the set test condition. It is easy to think that the parameters in this embodiment are for reference only and are not limited here.

[0071] Step S40, calculate the number of tests of the vehicle in the set test condition according to the first test duration and the second test duration;

[0072] In this embodiment, according to the first test duration and the second test duration, the number of tests of the vehicle in the set test condition can be calculated, so as to determine the number of times the other gearbox needs to run to reach the highest oil temperature value in the set test condition according to the calculated number of tests.

[0073] Further, in one embodiment, step S40 includes:

[0074] Substitute the first test duration and the second test duration into the first preset formula to calculate the number of tests of the vehicle in the set test condition. The first preset formula is as follows:

[0075]

[0076] Among them, n is the number of tests of the vehicle in the set test condition, T c is the first test duration, and t is the second test duration.

[0077] In this embodiment, because the first test duration T cThe first test duration T is the time taken for the vehicle to complete one test under the set test conditions. The second test duration t is the time taken for the transmission oil temperature of the vehicle to reach the first maximum oil temperature value from the initial value under the set test conditions. Therefore, by dividing the time taken for the transmission oil temperature of the vehicle to reach the first maximum oil temperature value from the initial value under the set test conditions by the time taken for the vehicle to complete one test under the set test conditions, the number of tests required for the transmission oil temperature of the vehicle to reach the first maximum oil temperature value from the initial value under the set test conditions can be obtained. That is, substituting the first test duration and the second test duration into the first preset formula to calculate the number of tests of the vehicle under the set test conditions. The first preset formula is as follows:

[0078]

[0079] where n is the number of tests of the vehicle under the set test conditions, T c is the first test duration, and t is the second test duration.

[0080] Step S50: Control the vehicle to which the transmission belongs to run the number of tests according to the set test conditions to obtain a preliminary maximum oil temperature value of the transmission.

[0081] In this embodiment, control the vehicle to which the transmission belongs to run under the set test conditions to obtain a preliminary maximum oil temperature value of the transmission. Among them, the number of times the vehicle to which the transmission belongs runs under the set test conditions is the number of tests of the vehicle under the set test conditions calculated in step S40.

[0082] Specifically, if the number of tests of the vehicle under the set test conditions calculated in step S40 is 5 times, since the first test duration for the vehicle to complete one test under the set test conditions is the time taken to obtain the vehicle to complete one driving condition under the set test conditions, after controlling the vehicle to which the transmission belongs to complete 5 driving conditions under the set test conditions, the oil temperature value of the transmission is a preliminary maximum oil temperature value of the transmission. That is, control the vehicle to which the transmission belongs to run the number of tests according to the set test conditions to obtain a preliminary maximum oil temperature of the transmission.

[0083] Step S60: Repeat the step of controlling the vehicle to which the transmission belongs to run the number of tests according to the set test conditions to obtain a preliminary maximum oil temperature value of the transmission.

[0084] In this embodiment, repeat the steps of step S50, that is, repeat the step of controlling the vehicle to which the transmission belongs to run the number of tests according to the set test conditions to obtain a preliminary maximum oil temperature value of the transmission.

[0085] Step S70: After reaching the preset number of times, calculate the maximum oil temperature value of the transmission from the multiple preliminary maximum oil temperature values of the transmission.

[0086] In this embodiment, after the number of times of repeatedly executing the step of controlling the vehicle to which the gearbox belongs to operate according to the set test conditions for the number of times of the test to obtain a preliminary maximum oil temperature value of the gearbox reaches the preset number of times, a plurality of preliminary maximum oil temperature values of the gearbox are obtained, and the maximum oil temperature value of the gearbox is calculated from the plurality of preliminary maximum oil temperature values of the gearbox.

[0087] Specifically, taking the preset number of times as 3 times as an example, since the vehicle to which the gearbox belongs is operated for the number of times of the test in the set test conditions to obtain a preliminary maximum oil temperature value of the gearbox, after repeatedly executing the step of controlling the vehicle to which the gearbox belongs to operate according to the set test conditions for the number of times of the test to obtain a preliminary maximum oil temperature value 3 times, that is, 3 preliminary maximum oil temperature values of the gearbox are obtained, and the maximum oil temperature value of the gearbox is calculated from the 3 preliminary maximum oil temperature values of the gearbox.

[0088] In this embodiment, the oil temperature of the gearbox of the vehicle from the driving start point to the driving end point under the specified mountain condition is obtained; the interval section in which the oil temperature of the gearbox continuously rises to the maximum oil temperature is intercepted, and the maximum oil temperature value in the intercepted multiple interval sections is used as the first maximum oil temperature value of the gearbox; the first test duration for the vehicle to complete one test in the set test conditions and the second test duration for the oil temperature of the gearbox to rise from the initial value to the first maximum oil temperature value are obtained; the number of times of the test for the vehicle in the set test conditions is calculated according to the first test duration and the second test duration; the vehicle to which the gearbox belongs is controlled to operate according to the set test conditions for the number of times of the test to obtain a preliminary maximum oil temperature value of the gearbox; the step of repeatedly controlling the vehicle to which the gearbox belongs to operate according to the set test conditions for the number of times of the test to obtain a preliminary maximum oil temperature value of the gearbox is repeated; after reaching the preset number of times, the maximum oil temperature value of the gearbox is calculated from the plurality of preliminary maximum oil temperature values of the gearbox. Through this embodiment, the test conditions are set according to the vehicle data from the driving start point to the driving end point of the vehicle under the specified mountain condition. By controlling the vehicle to which the gearbox belongs to operate according to the set test conditions for a certain number of times of the test, the maximum oil temperature value of the gearbox can be obtained, without waiting for the whole vehicle test in summer at high temperature, which can fully meet the requirements of the design cycle, and greatly reduces the development cost and the consumption of human and material resources, and solves the problems that the method for obtaining the maximum oil temperature of the gearbox in the prior art has time limitations and high costs.

[0089] Further, in an embodiment, the step of calculating the maximum oil temperature value of the gearbox from the plurality of preliminary maximum oil temperature values of the gearbox includes:

[0090] Substitute the plurality of preliminary maximum oil temperature values of the gearbox into the second preset formula to calculate the maximum oil temperature value of the gearbox. The second preset formula is as follows:

[0091] T max = max(T test1 ,Ttest2 ,......,T testK )

[0092] Among them, T max is the maximum oil temperature value of the transmission, and T test1 , T test2 ,......, T testK are multiple preliminary maximum oil temperature values of the transmission.

[0093] In this embodiment, by substituting multiple preliminary maximum oil temperature values of the transmission into the second preset formula, the maximum oil temperature value of the transmission can be calculated. The second preset formula is as follows:

[0094] T max = max(T test1 , T test2 ,......, T testK )

[0095] Among them, T max is the maximum oil temperature value of the transmission, and T test1 , T test2 ,......, T testK are multiple preliminary maximum oil temperature values of the transmission. The function max(a, b), if both a and b are matrices with more than 1 dimension, then it is required that the dimensions of the rows and columns of a and b are equal. The result of the function is to compare the magnitudes of each element in a and b. For example: a = [1, 2, 3; 4, 5, 6], b = 3, c = 5, then max(a, b) = [3, 3, 3; 4, 5, 6], max(b, c) = 5.

[0096] Furthermore, in one embodiment, after the step of calculating the maximum oil temperature value of the transmission from multiple preliminary maximum oil temperature values of the transmission, it includes:

[0097] Step S80, comparing the maximum oil temperature value of the transmission with the maximum oil temperature value calibrated by the vehicle system;

[0098] Step S90, if the maximum oil temperature value of the transmission is greater than the maximum oil temperature value calibrated by the vehicle system, then generate an alarm prompt.

[0099] In this embodiment, referring to Figure 4 , Figure 4 is the schematic flow diagram of the third embodiment of the test method for obtaining the maximum oil temperature of the transmission in the present invention. As Figure 4As shown, after obtaining the highest oil temperature value of the transmission, compare the highest oil temperature value of the transmission with the highest oil temperature value calibrated by the vehicle system. If the highest oil temperature value of the transmission is greater than the highest oil temperature value calibrated by the vehicle system, an alarm prompt is generated for relevant personnel to correct the performance of the vehicle and the transmission. If the highest oil temperature value of the transmission is less than or equal to the highest oil temperature value calibrated by the vehicle system, no processing is performed.

[0100] Thirdly, an embodiment of the present invention further provides a test device for obtaining the highest oil temperature of a transmission.

[0101] In one embodiment, referring to Figure 5 , Figure 5 is a schematic diagram of the functional modules of an embodiment of the test device for obtaining the highest oil temperature of the transmission according to the present invention. As Figure 5 shown, the test device for obtaining the highest oil temperature of the transmission includes:

[0102] The first acquisition module 10 is used to acquire the oil temperature value of the transmission from the driving starting point to the driving end point of the vehicle under the specified mountain condition;

[0103] The interception module 20 is used to intercept the interval section where the oil temperature value of the transmission continuously rises to the highest oil temperature value, and use the maximum oil temperature value in the intercepted multiple interval sections as the first highest oil temperature value of the transmission;

[0104] The second acquisition module 30 is used to acquire the first test duration for the vehicle to complete one test in the set test condition and the second test duration for the oil temperature of the transmission to rise from the initial value to the first highest oil temperature value;

[0105] The first calculation module 40 is used to calculate the number of test times of the vehicle in the set test condition according to the first test duration and the second test duration;

[0106] The control module 50 is used to control the vehicle to which the transmission belongs to run the number of test times according to the set test condition to obtain a preliminary highest oil temperature value of the transmission;

[0107] The execution module 60 is used to repeat the step of controlling the vehicle to which the transmission belongs to run the number of test times according to the set test condition to obtain a preliminary highest oil temperature value of the transmission;

[0108] The second calculation module 70 is used to calculate the highest oil temperature value of the transmission from the multiple preliminary highest oil temperature values of the transmission after reaching the preset number of times.

[0109] Furthermore, in one embodiment, the test device for obtaining the highest oil temperature of the transmission further includes a setting module for:

[0110] Set a test condition according to the obtained vehicle's overall vehicle data from the driving starting point to the driving ending point under the specified mountain conditions, where the overall vehicle data includes slope, vehicle speed, overall vehicle acceleration, and overall vehicle deceleration.

[0111] Further, in one embodiment, the first calculation module 40 is configured to:

[0112] Substitute the first test duration and the second test duration into a first preset formula to calculate the number of test times of the vehicle under the set test condition. The first preset formula is as follows:

[0113]

[0114] where n is the number of test times of the vehicle under the set test condition, T c is the first test duration, and t is the second test duration.

[0115] Further, in one embodiment, the second calculation module 70 is configured to:

[0116] Substitute multiple preliminary maximum oil temperature values of the transmission into a second preset formula to calculate the maximum oil temperature value of the transmission. The second preset formula is as follows:

[0117] T max =max(T test1 ,T test2 ,......,T testK )

[0118] where T max is the maximum oil temperature value of the transmission, and T test1 ,T test2 ,......,T testK are multiple preliminary maximum oil temperature values of the transmission.

[0119] Further, in one embodiment, the test device for obtaining the maximum oil temperature of the transmission further includes a comparison module, which is configured to:

[0120] Compare the maximum oil temperature value of the transmission with the maximum oil temperature value calibrated by the vehicle system;

[0121] If the maximum oil temperature value of the transmission is greater than the maximum oil temperature value calibrated by the vehicle system, an alarm prompt is generated.

[0122] Wherein, the function implementation of each module in the above test device for obtaining the maximum oil temperature of the transmission corresponds to each step in the embodiment of the above test method for obtaining the maximum oil temperature of the transmission, and its function and implementation process will not be elaborated here one by one.

[0123] Fourthly, the embodiment of the present invention further provides a readable storage medium.

[0124] A test program for obtaining the highest oil temperature of the transmission is stored on a readable storage medium of the present invention. When the test program for obtaining the highest oil temperature of the transmission is executed by a processor, the steps of the test method for obtaining the highest oil temperature of the transmission as described above are implemented.

[0125] Among them, the method implemented when the test program for obtaining the highest oil temperature of the transmission is executed can refer to each embodiment of the test method for obtaining the highest oil temperature of the transmission of the present invention, which will not be elaborated here.

[0126] It should be noted that in this article, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or system. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or system including the element.

[0127] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages and disadvantages of the embodiments.

[0128] Through the description of the above embodiments, those skilled in the art can clearly understand that the above embodiment methods can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium as described above (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions for causing a terminal device to execute the methods described in each embodiment of the present invention.

[0129] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A test method for obtaining the highest oil temperature of a gearbox, characterized in that, The test method for obtaining the highest oil temperature of the transmission includes: Obtaining the oil temperature value of the transmission from the starting point to the ending point of the vehicle under the specified mountainous working conditions; Intercepting the interval section where the oil temperature value of the transmission continuously rises to the highest oil temperature value, and taking the maximum oil temperature value among the intercepted multiple interval sections as the first highest oil temperature value of the transmission; Obtaining the first test duration for the vehicle to complete one test under the set test conditions and the second test duration for the oil temperature of the transmission to rise from the initial value to the first highest oil temperature value; Calculating the number of tests of the vehicle under the set test conditions based on the first test duration and the second test duration; Controlling the vehicle to which the transmission belongs to operate according to the set test conditions for the number of tests to obtain a preliminary highest oil temperature value of the transmission; Repeating the step of controlling the vehicle to which the transmission belongs to operate according to the set test conditions for the number of tests to obtain a preliminary highest oil temperature value of the transmission; After reaching the preset number of times, calculating the highest oil temperature value of the transmission from multiple preliminary highest oil temperature values of the transmission; Before the step of obtaining the first test duration for the vehicle to complete one test under the set test conditions and the second test duration for the oil temperature of the transmission to rise from the initial value to the first highest oil temperature value, it includes: Setting the test conditions according to the obtained vehicle's overall vehicle data from the starting point to the ending point under the specified mountainous working conditions, where the overall vehicle data includes slope, vehicle speed, overall vehicle acceleration, and overall vehicle deceleration; The step of calculating the number of tests of the vehicle under the set test conditions based on the first test duration and the second test duration includes: Substituting the first test duration and the second test duration into the first preset formula to calculate the number of tests of the vehicle under the set test conditions. The first preset formula is as follows: where n is the number of tests of the vehicle under the set test conditions, is the first test duration, and t is the second test duration.

2. The test method for obtaining the highest oil temperature of the gearbox according to claim 1, characterized in that, The step of calculating the highest oil temperature value of the transmission from multiple preliminary highest oil temperature values of the transmission includes: Substituting multiple preliminary highest oil temperature values of the transmission into the second preset formula to calculate the highest oil temperature value of the transmission. The second preset formula is as follows: Among them, is the highest oil temperature value of the transmission, are multiple preliminary highest oil temperature values of the transmission.

3. The test method for obtaining the highest oil temperature of the gearbox according to claim 1, characterized in that After the step of calculating the highest oil temperature value of the transmission from multiple preliminary highest oil temperature values of the transmission, it includes: Comparing the highest oil temperature value of the transmission with the highest oil temperature value calibrated by the vehicle system; If the highest oil temperature value of the transmission is greater than the highest oil temperature value calibrated by the vehicle system, generating an alarm prompt.

4. A test device for obtaining the highest oil temperature of a gearbox, characterized in that, The test device for obtaining the highest oil temperature of the transmission includes: A first acquisition module for obtaining the oil temperature value of the transmission from the starting point to the ending point of the vehicle under the specified mountainous working conditions; An interception module for intercepting the interval section where the oil temperature value of the transmission continuously rises to the highest oil temperature value, and taking the maximum oil temperature value among the intercepted multiple interval sections as the first highest oil temperature value of the transmission; A second acquisition module for obtaining the first test duration for the vehicle to complete one test under the set test conditions and the second test duration for the oil temperature of the transmission to rise from the initial value to the first highest oil temperature value; A first calculation module for calculating the number of tests of the vehicle under the set test conditions based on the first test duration and the second test duration; A control module, configured to control the vehicle to which the gearbox belongs to operate for the number of tests according to a set test condition, so as to obtain a preliminary maximum oil temperature value of the gearbox; An execution module, configured to repeat the step of controlling the vehicle to which the gearbox belongs to operate for the number of tests according to a set test condition, so as to obtain a preliminary maximum oil temperature value of the gearbox; A second calculation module, configured to calculate the maximum oil temperature value of the gearbox from multiple preliminary maximum oil temperature values of the gearbox after reaching a preset number of times; The test device for obtaining the maximum oil temperature of the gearbox further includes a setting module, configured to set a test condition according to the obtained vehicle's overall vehicle data from the driving starting point to the driving ending point under a specified mountain condition, where the overall vehicle data includes slope, vehicle speed, overall vehicle acceleration, and overall vehicle deceleration; The first calculation module is configured to: Substitute the first test duration and the second test duration into a first preset formula to calculate the number of tests of the vehicle under the set test condition. The first preset formula is as follows: where n is the number of tests of the vehicle under the set test conditions, is the first test duration, and t is the second test duration.

5. The test device for obtaining the highest oil temperature of the gearbox according to claim 4, characterized in that, The test device for obtaining the maximum oil temperature of the gearbox further includes a comparison module, configured to: Compare the maximum oil temperature value of the gearbox with the maximum oil temperature value calibrated by the vehicle system; If the maximum oil temperature value of the gearbox is greater than the maximum oil temperature value calibrated by the vehicle system, an alarm prompt is generated.

6. A test device for obtaining the highest oil temperature of a gearbox, characterized in that, The test equipment for obtaining the maximum oil temperature of the gearbox includes a processor, a memory, and a test program for obtaining the maximum oil temperature of the gearbox stored on the memory and executable by the processor. When the test program for obtaining the maximum oil temperature of the gearbox is executed by the processor, the steps of the test method for obtaining the maximum oil temperature of the gearbox as described in any one of claims 1 to 3 are implemented.

7. A readable storage medium, characterized in that, The readable storage medium stores a test program for obtaining the maximum oil temperature of the gearbox. When the test program for obtaining the maximum oil temperature of the gearbox is executed by a processor, the steps of the test method for obtaining the maximum oil temperature of the gearbox as described in any one of claims 1 to 3 are implemented.

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