Hybrid transmission ventilation test method, system and terminal

Abstract

The invention relates to the technical field of vehicles, and discloses a hybrid transmission ventilation test method and system, electronic equipment, a storage medium and a terminal, and the method comprises the steps: dividing at least one test condition based on vehicle driving data; adjusting the temperature of an environment bin based on different test working condition requirements; monitoring oil temperature change under different test working conditions, recording an oil temperature change curve, setting an oil temperature control target interval and a protection limit interval, and setting an alarm mechanism based on the oil temperature change; and associating the control signals of the environment bin temperature, the oil temperature and the rack rotating speed so as to realize unified monitoring and automatic control of test signals. According to the invention, the condition that a normally open type ventilation plug needs to be replaced after oil leakage each time is avoided, so that the test period is prolonged, the sample temperature is not influenced by the external environment, test signals are monitored in a unified manner, data interaction and recording are realized, the test process is more automatic, and risks caused by human error operation are avoided.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a hybrid transmission breath test method, system, electronic equipment, storage medium and terminal. Background Art

[0002] At present, in the field of automobile transmissions, the ventilation capacity of hybrid transmissions is an important indicator for evaluating automobile performance and sealing capabilities. Therefore, the ventilation test assessment of hybrid transmissions is particularly important.

[0003] In the previous ventilation test assessment process, oil absorbing paper is usually installed near the vent plug, and whether the vent plug leaks oil is used as the basis for judging whether the ventilation test has passed. This judgment method is often not accurate enough. For ventilation tests under various working conditions, the test cycle is relatively long. If oil leakage occurs during the test conditions, replacing the vent plug with a new one will not only extend the test cycle, but multiple replacements may also cause damage to the test sample and affect the sealing of the test sample. If the original vent plug continues to be used, the oil and gas inside it may affect the subsequent working conditions, resulting in inaccurate test results.

[0004] At the same time, for ventilation tests, oil temperature control during the test is extremely important. In previous tests, the oil temperature only needs to be maintained within the temperature range, but this method cannot achieve full coverage of the temperature state of the test specimens. Moreover, under different working conditions, the heating rates of different samples within the temperature range cannot be completely consistent, which is easily affected by the ambient temperature and cannot be effectively compared horizontally and vertically.

[0005] Therefore, the present application provides a hybrid transmission ventilation test method to solve the above technical problems. Summary of the invention

[0006] The purpose of the present invention is to provide a hybrid transmission ventilation test method, system, electronic equipment, storage medium and terminal to solve the technical problems in the prior art that the test cycle is extended due to replacing a new ventilation plug and the test is easily affected by the ambient temperature.

[0007] In order to solve the above technical problems, the present invention provides a hybrid transmission breath test method, comprising:

[0008] The road condition extraction step includes dividing at least one test condition based on the vehicle driving data, wherein the test condition is used to simulate the road condition encountered by the vehicle in actual driving;

[0009] The environmental temperature control step includes adjusting the temperature of the environmental chamber based on the different test conditions, wherein the temperature target value and the protection limit value are set, and the temperature of the environmental chamber is adjusted by adjusting the air volume of cold air and hot air and recording the current-voltage relationship of the temperature change;

[0010] The oil temperature monitoring step includes monitoring the oil temperature change under the different test conditions, recording the oil temperature change curve, setting the oil temperature control target range and protection limit range, and an alarm mechanism based on the oil temperature change;

[0011] The signal association control step includes associating the control signals of the environmental chamber temperature, the oil temperature and the test bench speed to achieve unified monitoring and automatic control of the test signals, including binding the duty cycle of the test signals.

[0012] In some specific embodiments, the road condition extraction step includes dividing at least one test condition based on the vehicle driving data, wherein the test condition is used to simulate the road condition encountered by the vehicle in actual driving, and further includes:

[0013] Collect the vehicle's actual driving speed, acceleration, slope and turning angle data to simulate the road conditions encountered by the vehicle in actual driving;

[0014] According to the collected vehicle driving data, the corresponding test conditions are simulated, including flat road uniform speed, acceleration, braking, slope driving, turning driving, acceleration and turning, turning braking, and lubricating oil water-containing conditions;

[0015] Setting parameters for each simulated test condition, including speed, acceleration, slope and turning angle, to ensure that the test can truly reflect actual driving conditions;

[0016] The test conditions are divided in detail, and operation steps and control strategies are formulated for each of the test conditions.

[0017] In some specific embodiments, the environmental temperature control step includes adjusting the temperature of the environmental chamber based on different test conditions, wherein the temperature target value and the protection limit value are set, and the temperature of the environmental chamber is adjusted by adjusting the air volume of cold air and hot air and recording the current-voltage relationship of the temperature change, further comprising:

[0018] By adjusting the air volume of cold air and hot air, the temperature in the environmental chamber is controlled to simulate the environmental temperature under different test conditions;

[0019] The temperature change in the environmental chamber is converted into the form of current and voltage and fed back for real-time adjustment of the temperature control strategy;

[0020] Set the target value and protection limit of temperature, including the minimum and maximum temperature, and the rate limit of temperature change to ensure that the ambient temperature during the test is within the safe range.

[0021] In some specific embodiments, the oil temperature monitoring step includes monitoring the oil temperature change under different test conditions, recording the oil temperature change curve, setting the oil temperature control target interval and the protection limit interval, and an alarm mechanism based on the oil temperature change, further including:

[0022] Under the different test conditions, continuously monitor the oil temperature change and record the oil temperature change curve;

[0023] Determining an oil temperature control strategy according to the oil temperature variation curve, including setting a target range and a protection limit range of the oil temperature;

[0024] Set oil temperature alarm limits. When the oil temperature exceeds the set limit, the alarm is automatically triggered and corresponding measures are taken, including shutdown and adjustment of oil temperature control strategy, to prevent damage caused by abnormal oil temperature.

[0025] In some specific embodiments, the signal association control step includes associating the control signals of the environmental chamber temperature, the oil temperature and the test bench speed to achieve unified monitoring and automatic control of the test signals, including binding the test signals to a duty cycle, and further includes:

[0026] Associating the test bench rotation speed with the oil temperature change, and controlling the oil temperature by adjusting the test bench rotation speed;

[0027] Associating the environmental chamber temperature with the oil temperature, adjusting the relationship between the environmental chamber temperature and the oil temperature change, and ensuring that the oil temperature can cover the entire set temperature range;

[0028] Binding the control signals of the environmental chamber temperature, the oil temperature and the test stand speed by duty cycle to achieve control of the parameters;

[0029] Realize unified monitoring and control of test signals, including setting corresponding alarm information, to improve the automation level and control accuracy of the test.

[0030] In some specific embodiments, it also includes:

[0031] The vent plug status monitoring step includes recording the status of the sample vent plug, including whether there is oil leakage, so as to evaluate the sealing performance of the sample;

[0032] An internal pressure change monitoring step, comprising recording changes in the internal pressure of the sample, including changes in pressure under different test conditions, to evaluate the internal pressure stability of the sample;

[0033] The test continuity control step includes continuing to the next test condition if there is no oil leakage and the internal pressure is stable, so as to ensure the continuity of the test;

[0034] The oil leakage cause analysis and treatment steps include suspending the test if the sample leaks oil, analyzing the cause of the oil leakage, and taking appropriate measures.

[0035] Based on the same concept, the present invention also provides a hybrid transmission breath test system, comprising:

[0036] A road condition extraction module, configured to divide at least one test condition based on vehicle driving data, wherein the test condition is used to simulate the road condition encountered by the vehicle in actual driving;

[0037] An environmental temperature control module is configured to adjust the temperature of the environmental chamber based on different test conditions, wherein a temperature target value and a protection limit value are set, and the temperature of the environmental chamber is adjusted by adjusting the air volume of cold air and hot air and recording the current-voltage relationship of the temperature change;

[0038] An oil temperature monitoring module configured to monitor oil temperature changes under different test conditions, record oil temperature change curves, set oil temperature control target intervals and protection limit intervals, and an alarm mechanism based on oil temperature changes;

[0039] The signal association control module is configured to associate the control signals of the environmental chamber temperature, the oil temperature and the test bench speed, so as to realize the unified monitoring and automatic control of the test signals, including binding the duty cycle of the test signals.

[0040] Based on the same concept, the present invention also provides an electronic device, comprising: a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other through the communication bus; a computer program is stored in the memory, and when the computer program is executed by the processor, the processor executes the steps of the hybrid transmission breathability test method.

[0041] Based on the same concept, the present invention also provides a computer-readable storage medium storing a computer program executable by an electronic device. When the computer program runs on the electronic device, the electronic device executes the steps of the hybrid transmission breath test method.

[0042] Based on the same concept, the present invention also provides a test terminal, which is provided with the hybrid transmission breath test system as described above.

[0043] Compared with the prior art, the beneficial effects are:

[0044] The present invention discloses a hybrid transmission ventilation test method, system, electronic equipment, storage medium and terminal, which avoid the need to replace the normally open vent plug every time it leaks oil, thereby extending the test period, using a closed environmental chamber for test bench construction to ensure that the sample temperature is not affected by the external environment, and uniformly monitoring the test signals to achieve data interaction and recording, making the test process more automated and avoiding the risks caused by human error operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a flow chart of a hybrid transmission breath test method of the present invention in some specific embodiments;

[0046] Figure 2 It is a schematic diagram of the architecture of a hybrid transmission breath test method in some applications of the present invention;

[0047] Figure 3 It is a schematic diagram of the flow of a hybrid transmission breath test method in some applications of the present invention;

[0048] Figure 4 It is a structural schematic diagram of a hybrid transmission ventilation test system of the present invention in some specific embodiments;

[0049] Figure 5 It is a schematic diagram of the structure of an electronic device in some specific embodiments of the present invention. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0051] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two.

[0052] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0053] It should be understood that, although the terms first, second, third, etc. may be used to describe in the embodiments of the present application, these descriptions should not be limited to these terms. These terms are only used to distinguish the descriptions. For example, without departing from the scope of the embodiments of the present application, the first may also be referred to as the second, and similarly, the second may also be referred to as the first.

[0054] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0055] It should also be noted that the term "includes", "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, so that a commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the commodity or device including the elements.

[0056] It should be particularly noted that any symbols and / or numbers in the specification that are not marked in the accompanying drawings are not drawing marks.

[0057] Reference Figure 1 , a hybrid transmission breath test method, comprising:

[0058] S101, a road condition extraction step, comprising dividing at least one test condition based on vehicle driving data, wherein the test condition is used to simulate the road condition encountered by the vehicle during actual driving;

[0059] It is understood that in the hybrid transmission breath test, the road condition extraction step is used to simulate actual driving conditions.

[0060] In some of the applications, at least one test condition is divided based on the vehicle driving data. The test condition is used to simulate the road conditions encountered by the vehicle in actual driving. The speed, acceleration, slope and turning angle data of the vehicle in actual driving are collected to simulate the road conditions encountered by the vehicle in actual driving; the corresponding test conditions are simulated according to the collected vehicle driving data, including uniform speed on flat roads, acceleration, braking, slope driving, turning driving, accelerated turning, turning braking and water-containing lubricating oil conditions; parameters are set for each simulated test condition, including speed, acceleration, slope and turning angle, to ensure that the test can truly reflect the actual driving conditions; the test conditions are divided in detail, and operation steps and control strategies are formulated for each test condition.

[0061] It is understandable that the speed and acceleration data of the vehicle under different road conditions are collected.

[0062] For example, on urban roads, the vehicle speed varies between 50 km / h and 80 km / h, and the acceleration varies between 0 m / s2 (constant speed) and 2 m / s2 (rapid acceleration).

[0063] For slope and turning angle data, it can be collected on mountain roads.

[0064] For example, the vehicle is traveling uphill at a speed of 30 km / h, the gradient is 15%, and the turning angle is 45 degrees or 90 degrees.

[0065] According to the collected data, the corresponding test conditions are simulated.

[0066] For example, a flat road uniform speed condition may be simulated, in which the vehicle travels at a speed of 60 km / h; or a slope driving condition may be simulated, in which the vehicle travels up a 10% slope at a speed of 30 km / h.

[0067] For turning driving conditions, a scenario in which a vehicle makes a 90-degree turn at a speed of 20 km / h can be simulated, which can be achieved by setting the corresponding tilt angle on the test bench.

[0068] Set the parameters for each simulated test case.

[0069] For example, in the case of a flat road with a constant speed, the speed parameter is set to 60 km / h and the acceleration parameter is set to 0 m / s2; in the case of a sloped road, the speed parameter is set to 30 km / h and the slope parameter is set to 10%. For a turning road, the speed parameter is set to 20 km / h and the turning angle parameter is set to 90 degrees.

[0070] Divide the test conditions into details, and formulate operation steps and control strategies for each test condition.

[0071] For example, in a flat road and constant speed condition, the operation steps include starting the vehicle, accelerating to 60 km / h and maintaining that speed; the control strategy includes monitoring speed changes to ensure that the vehicle maintains a constant speed.

[0072] In the slope driving condition, the operation steps include going uphill at a speed of 30 km / h; the control strategy includes adjusting the power output to maintain the speed while monitoring the vehicle's acceleration and slope changes.

[0073] For the water-containing lubricant condition, the vehicle driving in a wet environment can be simulated. The operating steps include driving under simulated rainy conditions, and the control strategy includes monitoring the performance changes of the lubricant, such as viscosity and lubrication effect.

[0074] S102, an environmental temperature control step, comprising adjusting the temperature of the environmental chamber based on different test conditions, wherein a temperature target value and a protection limit value are set, and the temperature of the environmental chamber is adjusted by adjusting the air volume of cold air and hot air and recording the current-voltage relationship of the temperature change;

[0075] It is understood that in the hybrid transmission breath test, the ambient temperature control step is used to ensure that the test is conducted under simulated actual driving conditions.

[0076] In some of these applications, based on different test conditions, the temperature of the environmental chamber is adjusted, and the temperature target value and protection limit are set. The temperature of the environmental chamber is adjusted by adjusting the air volume of cold air and hot air and recording the current-voltage relationship of the temperature change. The temperature in the environmental chamber is controlled by adjusting the air volume of cold air and hot air to simulate the ambient temperature under different test conditions; the temperature change in the environmental chamber is converted into the form of current and voltage and fed back for real-time adjustment of the temperature control strategy; the temperature target value and protection limit are set, including the minimum and maximum temperature values, as well as the rate limit of temperature change, to ensure that the ambient temperature during the test is within a safe range.

[0077] It is understood that the temperature target value of the environmental chamber is set according to the requirements of the test conditions. For example, for a test condition simulating driving in a high temperature environment, the temperature target value is set to 45°C.

[0078] The temperature in the environmental chamber is controlled by adjusting the air volume of cold and hot air.

[0079] For example, if the current temperature of the environment chamber is 30℃, it needs to be raised to 45℃, reducing the air volume of cold air and increasing the air volume of hot air. The specific operation can increase the hot air volume from 20% to 50%, while reducing the cold air volume from 80% to 50%.

[0080] The temperature change is converted into current and voltage through the temperature sensor for feedback.

[0081] For example, using a temperature sensor, whose output voltage is proportional to temperature, when the temperature of the environmental chamber increases from 30°C to 45°C, the output voltage of the sensor changes from 0.5V to 1.0V.

[0082] The current and voltage data are recorded and used to adjust the temperature control strategy in real time.

[0083] For example, if the temperature rises too quickly and approaches a set rate limit, the hot air flow rate will be reduced to ensure that the temperature does not change beyond a safe rate.

[0084] Set the target value and protection limit of the temperature to ensure that the ambient temperature during the test is within the safe range. For example, for the above high temperature environment test, the minimum temperature can be set to 35℃ and the maximum temperature to 50℃.

[0085] Set a rate limit for temperature change to prevent damage to the test sample caused by excessively rapid temperature changes. For example, it can be stipulated that the temperature change shall not exceed 5°C in any 5-minute period.

[0086] By monitoring the temperature in the environmental chamber in real time, the temperature control strategy is adjusted to keep the temperature near the target value. For example, if the temperature exceeds 45°C, the hot air volume is reduced or the cold air volume is increased to lower the temperature.

[0087] Check the current and voltage feedback periodically to ensure that the temperature changes within the set rate limits. If the temperature changes too quickly, adjust the air flow setting to slow the rate of temperature change.

[0088] For example, to simulate a test condition of driving on a hot summer day, the target temperature of the environmental chamber is set to 40°C, the minimum temperature is 35°C, and the maximum temperature is 45°C. The rate limit of temperature change is set to no more than 3°C every 5 minutes.

[0089] At the beginning of the test, the initial temperature of the environmental chamber was 25°C. The hot air volume was increased to 70% and the cold air volume was reduced to 30% to quickly heat up.

[0090] After 10 minutes, the temperature rises to 35°C. According to the current and voltage feedback, the temperature rise rate is 2°C / 5 minutes, which meets the rate limit.

[0091] Continue heating, and after 20 minutes, the temperature reaches 40°C. Reduce the hot air volume to 50% to maintain the temperature near the target value.

[0092] After 30 minutes, the temperature rose to 41°C due to external heat input. The hot air volume was further reduced to 30%, and the cold air volume was increased to 40% to control the temperature not to exceed the maximum limit of 45°C.

[0093] S103, an oil temperature monitoring step, including monitoring oil temperature changes under different test conditions, recording oil temperature change curves, setting oil temperature control target intervals and protection limit intervals, and an alarm mechanism based on oil temperature changes;

[0094] It is understandable that in the hybrid transmission breath test, the oil temperature monitoring step is used to ensure the safety and effectiveness of the test.

[0095] In some of these applications, oil temperature changes are monitored under different test conditions, the oil temperature change curve is recorded, and the oil temperature control target range and protection limit range are set. In the alarm mechanism based on oil temperature changes, oil temperature changes are continuously monitored under different test conditions, and the oil temperature change curve is recorded; based on the oil temperature change curve, the oil temperature control strategy is determined, including setting the target range and protection limit range of the oil temperature; the oil temperature alarm limit is set. When the oil temperature exceeds the set limit, the alarm is automatically triggered and corresponding measures are taken, including shutting down and adjusting the oil temperature control strategy to prevent damage caused by abnormal oil temperature.

[0096] It is understood that during the test, the oil temperature was continuously monitored using a high-precision temperature sensor. For example, in the test conditions simulating urban driving, the vehicle was frequently started and stopped and the speed was changed, and the oil temperature was observed to vary between 70°C and 90°C.

[0097] The temperature sensor records the oil temperature data at intervals of 1 second, which is used to draw the oil temperature change curve. For example, under acceleration conditions, the oil temperature rises rapidly from 80°C to 100°C, while under constant speed driving, the oil temperature is stable at around 95°C.

[0098] The oil temperature control strategy is determined based on the recorded oil temperature curve. For example, the target oil temperature range can be set to 85°C to 95°C to ensure that the hybrid transmission operates at the optimal operating temperature.

[0099] At the same time, a protection limit interval is set, for example, the upper limit is set to 105° C. and the lower limit is set to 75° C. The limit interval is used to prevent the oil temperature from being too high or too low, thereby protecting the transmission from damage.

[0100] Set the oil temperature alarm limit, and when the oil temperature exceeds the set limit, the alarm will be automatically triggered. For example, if the oil temperature exceeds the upper limit of 105℃, an audible and visual alarm will be issued immediately.

[0101] The alarm mechanism includes automatic shutdown and adjustment of oil temperature control strategy. For example, if the oil temperature exceeds 105℃ continuously, the test will be automatically paused and the cooling system will be activated to reduce the oil temperature.

[0102] When the oil temperature is below the lower limit of 75°C, the test load can be increased to raise the oil temperature to the target range. If the oil temperature is above 105°C, the load can be reduced or additional cooling measures can be used.

[0103] Measures ensure that the oil temperature remains within a safe operating range to prevent damage caused by abnormal oil temperature. For example, if the oil temperature is continuously too high, it will cause thermal damage to the internal components of the transmission, while if the oil temperature is too low, it will affect the lubrication effect.

[0104] S104, a signal correlation control step, including correlating control signals of the environmental chamber temperature, the oil temperature and the test bench speed, for realizing unified monitoring and automatic control of test signals, including binding the test signals to duty cycles.

[0105] It is understandable that in the hybrid transmission ventilation test, the signal correlation control step is used to achieve unified monitoring and automatic control of the test signal.

[0106] In some of these applications, the control signals of the environmental chamber temperature, oil temperature and test bench speed are associated to achieve unified monitoring and automatic control of the test signals. The test signals are bound by duty cycle, the test bench speed is associated with the oil temperature change, and the oil temperature is controlled by adjusting the test bench speed. The environmental chamber temperature is associated with the oil temperature, and the relationship between the environmental chamber temperature and the oil temperature change is adjusted to ensure that the oil temperature can cover the entire set temperature range. The control signals of the environmental chamber temperature, oil temperature and test bench speed are bound by duty cycle to achieve control of parameters. Unified monitoring and control of test signals are achieved, including setting corresponding alarm information, to improve the automation level and control accuracy of the test.

[0107] It is understood that the control signals for the environmental chamber temperature, the oil temperature and the test bench speed are correlated. The correlation is based on real-time data feedback and a preset control algorithm to ensure that the parameters work together to achieve the best test conditions.

[0108] For example, if the oil temperature is below the set target range, the test bench speed can be increased to increase the oil temperature, and the environmental chamber temperature can be adjusted to assist in increasing the oil temperature.

[0109] The test bench speed is associated with the oil temperature change, and the oil temperature is controlled by adjusting the test bench speed. The adjustment is achieved through the duty cycle signal, which is a periodic signal whose high level duration and the ratio of the total period can be adjusted.

[0110] For example, if the oil temperature needs to be increased, the duty cycle of the test bench speed control signal is increased from 50% to 70% to increase the output power of the test bench, thereby increasing the oil temperature.

[0111] The ambient chamber temperature is correlated with the oil temperature, and the relationship between the ambient chamber temperature and the oil temperature change is adjusted. If the oil temperature is too high, the ambient chamber temperature can be lowered, which can be achieved by reducing the duty cycle of the ambient chamber temperature control signal from 70% to 50%.

[0112] Achieve unified monitoring and control of test signals, including setting corresponding alarm information. According to the real-time monitoring of environmental chamber temperature, oil temperature and test bench speed, adjust the control strategy according to the real-time values ​​of these parameters.

[0113] For example, an alarm threshold can be set. If the oil temperature exceeds the set maximum value (such as 105°C), an alarm is triggered and the test bench speed and environmental chamber temperature are automatically adjusted to quickly reduce the oil temperature to a safe range.

[0114] For example, the goal is to maintain the oil temperature in the range of 90°C to 100°C while simulating different driving conditions. At the beginning of the test, the oil temperature is 85°C, which is below the target range. The duty cycle of the bench speed control signal is increased from 50% to 60% to increase the oil temperature. After 5 minutes, the oil temperature rises to 95°C, which is in the middle of the target range. At this time, the ambient chamber temperature is 40°C, and the current bench speed and ambient chamber temperature are maintained to maintain the oil temperature. As the test progresses, the oil temperature gradually rises to 102°C, approaching the set maximum value. An alarm is triggered, and the duty cycle of the bench speed control signal is automatically reduced from 60% to 50%, while the duty cycle of the ambient chamber temperature control signal is reduced from 70% to 60% to reduce the oil temperature. If the oil temperature continues to rise to 105°C, further measures are taken, such as increasing the flow rate of the cooling system and reducing the duty cycle of the bench speed control signal to 40%, to ensure that the oil temperature is quickly reduced to a safe range.

[0115] In some of these applications, a vent plug status monitoring step is also included, including recording the status of the sample vent plug, including whether oil leakage occurs, so as to evaluate the sealing performance of the sample; an internal pressure change monitoring step is included, including recording the changes in the internal pressure of the sample, including the pressure changes under different test conditions, so as to evaluate the internal pressure stability of the sample; a test continuity control step is included, including if the sample does not leak oil and the internal pressure is stable, then continuing the test to the next test condition, so as to ensure the continuity of the test; an oil leakage cause analysis and treatment step is included, including if the sample leaks oil, then suspending the test, analyzing the cause of the oil leakage, and taking corresponding measures.

[0116] It is understood that in the hybrid transmission breather test, monitoring the breather plug status and internal pressure changes are used to evaluate the sealing performance and stability of the sample.

[0117] Record the status of the sample vent plug and pay attention to whether there is oil leakage. For quantitative evaluation, weigh the vent plug before and after the test to detect whether there is any change in the amount of oil. Record the change in the internal pressure of the sample. A pressure threshold can be set. If the pressure threshold is exceeded, it will be automatically recorded and a warning will be issued. Control the continuity of the test based on the monitoring results of the vent plug status and internal pressure. If the sample does not leak oil and the internal pressure is stable, continue the test of the next test condition. If the sample leaks oil, suspend the test, analyze the cause of the oil leakage, and take appropriate measures. For example, if there are oil stains around the vent plug, check whether the tightening torque of the vent plug meets the specifications. Assuming that the tightening torque is lower than the specified value (for example, the specified value is 20Nm and the actual measured value is 15Nm), re-tighten the vent plug to the specified torque and re-test to verify whether the oil leakage problem has been solved. If the oil leakage problem is caused by the material or design of the vent plug, replace the vent plug or adjust the design, and perform additional tests to ensure that the problem is solved.

[0118] Combine the following Figure 2 and Figure 3 The following are some examples of hybrid transmission breath test methods in some applications:

[0119] like Figure 2 and Figure 3 As shown in the figure, the road conditions encountered by the vehicle in the formal process are extracted through the load road spectrum, and the test conditions are divided in detail;

[0120] Calibrate the temperature of the environmental chamber, control the temperature of the environmental chamber by controlling the air volume of cold air and hot air, record the corresponding current-voltage relationship and feed it back to the temperature control system, and set the corresponding temperature limit;

[0121] Carry out sample oil temperature calibration. The temperature acquisition module records the change curve of oil temperature under different working conditions. Set the test oil temperature within the temperature range (a, b), set the protection limit range (A, B), record the current and voltage changes in this process, and perform temperature calibration.

[0122] The test bench speed is calibrated, and the voltage and current signals corresponding to the test bench speed under different working conditions are recorded in the above manner;

[0123] Bind the marked test signals to duty cycles, establish the connection between the test bench speed, ambient temperature and oil temperature, realize unified monitoring of test signals, and set corresponding alarm information;

[0124] By using different test bench speeds under different working conditions to control the temperature of the environmental chamber, the oil temperature can completely cover the temperature range required for the test. The image monitoring module monitors the state of the sample vent plug, and the pressure monitoring module records the internal pressure changes of the sample in real time.

[0125] If the sample does not leak oil after completing this working condition and the internal pressure of the sample is stable, continue the working condition; if the sample leaks oil, suspend the test, check the alarm information, and conduct oil leakage analysis.

[0126] This embodiment is described below in conjunction with application scenarios:

[0127] The test conditions are divided into flat road uniform speed conditions, flat road acceleration conditions, flat road braking conditions, slope driving conditions, turning driving conditions, acceleration and turning conditions, turning braking conditions and lubricating oil water conditions through the vehicle load road spectrum. The image monitoring module and pressure monitoring module are installed and debugged to ensure that the sample status can be clearly monitored.

[0128] The temperature of the environmental chamber is calibrated. The wind speed and flow rate of the cold and hot air in the cavity of the environmental chamber control the internal temperature of the environmental chamber. At this time, the temperature in the environmental chamber is fed back to the temperature control system in the form of current and voltage, so as to calibrate the temperature of the environmental chamber. The temperature limit is recorded as cab in temperature min = -60 ° C, cabin temperature max = 180 ° C, and the temperature protection limit is set as cabin_T min = -45 ° C, cabin_T max = 160 ° C, and the temperature at this time is fed back to the environmental chamber temperature control system in the form of electrical signals cabin_T current min = 0 mA; cabin_T current max = 20000 mA;

[0129] Carry out oil temperature calibration of the sample. During the test run of the bench, the temperature acquisition module records the change curve of the oil temperature of the sample at different speeds, and feeds back the temperature change to the temperature acquisition module in the form of an electrical signal to calibrate the oil temperature of the sample and record it as Oil temperature current. At the same time, the test oil temperature is set at (110±10)℃, and the oil temperature alarm limit is set at 140℃. If the temperature exceeds this, the bench will automatically alarm and shut down to ensure that the internal shaft gear of the sample operates within the safe oil temperature range.

[0130] The test bench speed is calibrated, and the test bench speed under different working conditions is also fed back to the test bench control end in the form of electrical signals, and the current corresponding to the test bench speed under different working conditions is recorded as Bench current_1 = 5000mA, Bench current_2 = 2000mA, Bench current_3 = 2500mA, Bench current_4 = 4000mA, ...;

[0131] The bench speed signal Bench current and the sample oil temperature signal Oil temperature current are correlated by duty cycle after calibration under each working condition, and the change relationship of the sample oil temperature under each working condition is recorded as K. At this time, the calibrated environmental chamber temperature signal cab in_T current is adjusted, and this signal is correlated with the oil temperature change relationship K, and recorded as cab in_T_Oil temperature_K current, so that the sample can complete the gentle increase of the oil temperature from 100℃ to 120℃ within the specified time of the test conditions under each working condition, so that the oil temperature can completely cover the entire set temperature range;

[0132] The state of the sample vent plug is recorded through the image monitoring module, and the change in the internal pressure of the sample is recorded through the pressure monitoring module. If there is no oil leakage in the sample and the internal pressure of the sample is stable after completing this working condition, the working condition will continue; if there is oil leakage in the sample, the test will be suspended, the alarm information will be checked, and oil leakage analysis will be carried out through each sample status recording module and the sample oil temperature change information.

[0133] In summary, this embodiment adopts a mechanical normally closed vent plug, which avoids the need to replace the vent plug every time the normally open vent plug leaks oil, thereby extending the test period; at the same time, an image monitoring module is added to avoid the risk caused by close human observation during the test, and a pressure monitoring module is added to more accurately judge the sample state by monitoring the internal pressure changes of the sample;

[0134] A closed environmental chamber is used for test bench construction to ensure that the sample temperature is not affected by the external environment. At the same time, the temperature control system of the environmental chamber is calibrated to establish the oil temperature, environmental chamber temperature, and test bench speed control system to ensure that the oil temperature can cover from point a to point b under different working conditions, thus ensuring the integrity and accuracy of the test.

[0135] By calibrating the temperature of the environmental chamber, oil temperature, internal pressure of the sample and other signals and importing them into the test bench signal, the test signals are monitored uniformly, data interaction and recording are realized, the test process is made more automated, and the risks caused by human error are avoided;

[0136] According to the actual vehicle load road spectrum and the actual conditions encountered during the actual driving of the vehicle, the working conditions are further divided into detailed categories to ensure that the test conditions fully cover the situations encountered during the actual driving of the vehicle.

[0137] For the method steps disclosed in the above embodiments, the method steps are described as a series of action combinations for the purpose of simple description, but those skilled in the art should know that the embodiments of the present invention are not limited by the order of the actions described, because according to the embodiments of the present invention, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present invention.

[0138] like Figure 4 As shown, the present invention also provides a hybrid transmission breath test system, comprising:

[0139] The road condition extraction module 201 is configured to divide at least one test condition based on the vehicle driving data, wherein the test condition is used to simulate the road condition encountered by the vehicle in actual driving;

[0140] The environmental temperature control module 202 is configured to adjust the temperature of the environmental chamber based on the different test conditions, wherein the temperature target value and the protection limit value are set, and the temperature of the environmental chamber is adjusted by adjusting the air volume of cold air and hot air and recording the current-voltage relationship of the temperature change;

[0141] The oil temperature monitoring module 203 is configured to monitor the oil temperature change under different test conditions, record the oil temperature change curve, set the oil temperature control target interval and protection limit interval, and an alarm mechanism based on the oil temperature change;

[0142] The signal association control module 204 is configured to associate the control signals of the environmental chamber temperature, the oil temperature and the test bench speed, so as to realize the unified monitoring and automatic control of the test signals, including binding the duty cycle of the test signals.

[0143] It is worth noting that although only some basic functional modules are disclosed in the embodiments of the present invention, it does not mean that the composition of the present system is limited to the above basic functional modules. On the contrary, what the present embodiment wants to express is that on the basis of the above basic functional modules, those skilled in the art can arbitrarily add one or more functional modules in combination with the prior art to form an infinite number of embodiments or technical solutions. In other words, the present system is open rather than closed. Just because the present embodiment only discloses individual basic functional modules, it cannot be considered that the protection scope of the claims of the present invention is limited to the disclosed basic functional modules. At the same time, for the convenience of description, the above devices are described in terms of functions and are described separately in various units and modules. Of course, when implementing the present invention, the functions of each unit and module can be implemented in the same or one or more software and / or hardware.

[0144] like Figure 5As shown, the present invention also provides an electronic device, comprising: a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other through the communication bus; a computer program is stored in the memory, and when the computer program is executed by the processor, the processor executes the steps of the hybrid transmission breath test method.

[0145] Figure 5 Schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. Figure 5 The electronic device provided in the embodiment of the present invention includes: one or more processors 710 and a storage device 720; the processor 710 in the electronic device may be one or more, Figure 5 A processor 710 is taken as an example; the storage device 720 is used to store one or more programs; the one or more programs are executed by the one or more processors 710, so that the one or more processors 710 implement the hybrid transmission ventilation test method as described in any one of the embodiments of the present invention.

[0146] The electronic device may further include: an input device 730 and an output device 740 .

[0147] The processor 710, storage device 720, input device 730 and output device 740 in the electronic device can be connected via a bus or other means. Figure 5 The example of connecting through bus is taken in the following.

[0148] The storage device 720 in the electronic device is a computer-readable storage medium that can be used to store one or more programs, which can be software programs, computer executable programs and modules, such as program instructions / modules corresponding to the hybrid transmission breath test test method provided in the embodiment of the present invention. The processor 710 executes various functional applications and data processing of the electronic device by running the software programs, instructions and modules stored in the storage device 720, that is, implementing the hybrid transmission breath test test method in the above method embodiment.

[0149] The storage device 720 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the electronic device, etc. In addition, the storage device 720 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some instances, the storage device 720 may further include a memory remotely arranged relative to the processor 710, and these remote memories may be connected to the device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0150] The input device 730 may be used to receive input digital or character information and generate key signal input related to user settings and function control of the electronic device. The output device 740 may include a display device such as a display screen.

[0151] The present invention also provides a computer-readable storage medium storing a computer program executable by an electronic device. When the computer program runs on the electronic device, the electronic device executes the steps of the hybrid transmission breath test method.

[0152] Specifically, the computer storage medium of the embodiment of the present invention can adopt any combination of one or more computer-readable media. The computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples (non-exhaustive list) of computer-readable storage media include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present embodiment, the computer-readable storage medium can be any tangible medium containing or storing a program, which can be used by an instruction execution system, device or device or used in combination with it.

[0153] The present invention also provides a test terminal, which is provided with the hybrid transmission breath test system as described above.

[0154] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hybrid transmission breath test method, characterized in that: include: The road condition extraction step includes dividing at least one test condition based on the vehicle driving data, wherein the test condition is used to simulate the road condition encountered by the vehicle in actual driving; The environmental temperature control step includes adjusting the temperature of the environmental chamber based on the different test conditions, wherein the temperature target value and the protection limit value are set, and the temperature of the environmental chamber is adjusted by adjusting the air volume of cold air and hot air and recording the current-voltage relationship of the temperature change; The oil temperature monitoring step includes monitoring the oil temperature change under the different test conditions, recording the oil temperature change curve, setting the oil temperature control target range and protection limit range, and an alarm mechanism based on the oil temperature change; The signal association control step includes associating the control signals of the environmental chamber temperature, the oil temperature and the test bench speed to achieve unified monitoring and automatic control of the test signals, including binding the duty cycle of the test signals.

2. The hybrid transmission breath test method according to claim 1, characterized in that: The road condition extraction step includes dividing at least one test condition based on the vehicle driving data, wherein the test condition is used to simulate the road condition encountered by the vehicle in actual driving, and further includes: Collect the vehicle's actual driving speed, acceleration, slope and turning angle data to simulate the road conditions encountered by the vehicle in actual driving; According to the collected vehicle driving data, the corresponding test conditions are simulated, including flat road uniform speed, acceleration, braking, slope driving, turning driving, acceleration and turning, turning braking, and lubricating oil water-containing conditions; Setting parameters for each simulated test condition, including speed, acceleration, slope and turning angle, to ensure that the test can truly reflect actual driving conditions; The test conditions are divided in detail, and operation steps and control strategies are formulated for each of the test conditions.

3. The hybrid transmission breath test method according to claim 1, characterized in that: The environmental temperature control step includes adjusting the temperature of the environmental chamber based on the different test conditions, wherein the temperature target value and the protection limit value are set, and the temperature of the environmental chamber is adjusted by adjusting the air volume of cold air and hot air and recording the current-voltage relationship of the temperature change, further including: By adjusting the air volume of cold air and hot air, the temperature in the environmental chamber is controlled to simulate the environmental temperature under different test conditions; The temperature change in the environmental chamber is converted into the form of current and voltage and fed back for real-time adjustment of the temperature control strategy; Set the target value and protection limit of temperature, including the minimum and maximum temperature, and the rate limit of temperature change to ensure that the ambient temperature during the test is within the safe range.

4. The hybrid transmission breath test method according to claim 1, characterized in that: The oil temperature monitoring step includes monitoring the oil temperature change under different test conditions, recording the oil temperature change curve, setting the oil temperature control target interval and protection limit interval, and an alarm mechanism based on the oil temperature change, further including: Under the different test conditions, continuously monitor the oil temperature change and record the oil temperature change curve; Determining an oil temperature control strategy according to the oil temperature variation curve, including setting a target range and a protection limit range of the oil temperature; Set oil temperature alarm limits. When the oil temperature exceeds the set limit, the alarm is automatically triggered and corresponding measures are taken, including shutdown and adjustment of oil temperature control strategy, to prevent damage caused by abnormal oil temperature.

5. The hybrid transmission breath test method according to claim 1, characterized in that: The signal association control step includes associating the control signals of the environmental chamber temperature, the oil temperature and the test bench speed to realize the unified monitoring and automatic control of the test signals, including binding the test signals to a duty cycle, and further includes: Associating the test bench rotation speed with the oil temperature change, and controlling the oil temperature by adjusting the test bench rotation speed; Associating the environmental chamber temperature with the oil temperature, adjusting the relationship between the environmental chamber temperature and the oil temperature change, and ensuring that the oil temperature can cover the entire set temperature range; Binding the control signals of the environmental chamber temperature, the oil temperature and the test stand speed by duty cycle to achieve control of the parameters; Realize unified monitoring and control of test signals, including setting corresponding alarm information, to improve the automation level and control accuracy of the test.

6. The hybrid transmission breath test method according to claim 1, characterized in that: Also includes: The vent plug status monitoring step includes recording the status of the sample vent plug, including whether there is oil leakage, so as to evaluate the sealing performance of the sample; An internal pressure change monitoring step, comprising recording changes in the internal pressure of the sample, including changes in pressure under different test conditions, to evaluate the internal pressure stability of the sample; The test continuity control step includes continuing to the next test condition if there is no oil leakage and the internal pressure is stable, so as to ensure the continuity of the test; The oil leakage cause analysis and treatment steps include suspending the test if the sample leaks oil, analyzing the cause of the oil leakage, and taking appropriate measures.

7. A hybrid transmission breath test system, characterized in that: include: A road condition extraction module, configured to divide at least one test condition based on vehicle driving data, wherein the test condition is used to simulate the road condition encountered by the vehicle in actual driving; An environmental temperature control module is configured to adjust the temperature of the environmental chamber based on different test conditions, wherein a temperature target value and a protection limit value are set, and the temperature of the environmental chamber is adjusted by adjusting the air volume of cold air and hot air and recording the current-voltage relationship of the temperature change; An oil temperature monitoring module configured to monitor oil temperature changes under different test conditions, record oil temperature change curves, set oil temperature control target intervals and protection limit intervals, and an alarm mechanism based on oil temperature changes; The signal association control module is configured to associate the control signals of the environmental chamber temperature, the oil temperature and the test bench speed, so as to realize the unified monitoring and automatic control of the test signals, including binding the duty cycle of the test signals.

8. An electronic device, characterized in that: include: A processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus; a computer program is stored in the memory, and when the computer program is executed by the processor, the processor executes the steps of the method described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that: It stores a computer program executable by an electronic device, and when the computer program runs on the electronic device, the electronic device executes the steps of the method described in any one of claims 1 to 6.

10. A test terminal, characterized in that: The test terminal is provided with the hybrid transmission breath test system as claimed in claim 7.

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