Electrically-driven refueling amount testing system and refueling amount testing method

Abstract

The invention relates to an electric drive refueling amount testing system and method, the system is used for testing the refueling amount of a to-be-tested electric drive, the electric drive refueling amount testing system comprises a communicating vessel, the communicating vessel is used for being connected with the to-be-tested electric drive, and the communicating vessel comprises a first opening and a second opening; the first opening and the second opening are used for being connected with a to-be-detected electric drive so that oil of the to-be-detected electric drive can flow into the communicating vessel, a liquid level sensor is arranged at the bottom of the communicating vessel, and the liquid level sensor is used for detecting the liquid level value of the oil in the communicating vessel; the distance from the first opening to the reference station is greater than that from the second opening to the reference station; the control acquisition module is connected with the liquid level sensor, and the control acquisition module is used for acquiring the liquid level value sent by the liquid level sensor and determining the minimum refueling amount and the maximum refueling amount of the to-be-detected electric drive according to the liquid level value; and the liquid level sensor is arranged at the bottom of the communicating vessel, so that the liquid level value of oil in the communicating vessel can be accurately detected, and the measurement accuracy of the oil filling amount is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobiles, and particularly relates to an electric drive fuel filling amount testing system and a fuel filling amount testing method. Background Art

[0002] With the development of technology, the importance of confirming the lubricating oil filling amount of a distributed electric drive system has become increasingly prominent. It has a significant impact on system performance, cooling, lubrication, and cost control. In the prior art, in order to confirm the fuel filling amount of the electric drive system, the electric drive system is made into a transparent housing, and the fuel filling amount is observed manually. However, the traditional method of observing and determining the fuel filling amount range by relying on the transparent prototype housing is subject to large interference errors in subjective judgment and cannot accurately obtain the fuel filling amount. Summary of the Invention

[0003] In view of the above problems, embodiments of the present invention are proposed to provide an electric drive fuel filling amount testing system and a fuel filling amount testing method that overcome the above problems or at least partially solve the above problems.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] To solve the above problems, in a first aspect, an embodiment of the present invention discloses an electric drive fuel filling amount testing system for testing the fuel filling amount of a to-be-tested electric drive. The electric drive fuel filling amount testing system includes:

[0006] A communicating vessel, which is used to connect with the to-be-tested electric drive. The communicating vessel includes a first opening and a second opening. The first opening and the second opening are respectively used to connect with the to-be-tested electric drive so that the oil liquid of the to-be-tested electric drive flows into the communicating vessel. A liquid level sensor is arranged at the bottom of the communicating vessel, and the liquid level sensor is used to detect the liquid level value of the oil liquid in the communicating vessel; the height of the first opening is higher than the height of the second opening;

[0007] A control and acquisition module, which is connected with the liquid level sensor. The control and acquisition module is used to obtain the liquid level value sent by the liquid level sensor and determine the minimum fuel filling amount and the maximum fuel filling amount of the to-be-tested electric drive according to the liquid level value.

[0008] Optionally, the to-be-tested electric drive includes an electric pump and a motor; the control and acquisition module is used to connect with the to-be-tested electric drive;

[0009] The control and acquisition module is used to set the electric pump to the highest electric pump speed, set the motor to the highest motor speed, and monitor the liquid level value of the oil amount during the fuel filling process of the to-be-tested electric drive by the user through the liquid level sensor, and determine the minimum fuel filling amount value of the to-be-tested electric drive according to the liquid level value.

[0010] Optionally, the liquid level sensor includes a suction empty liquid level marking line. The control and acquisition module is configured to determine whether the liquid level value of the oil quantity reaches the suction empty liquid level marking line during the process of the user refueling the electric drive to be tested. If the liquid level value does not reach the suction empty liquid level marking line, continue refueling until the liquid level value reaches the suction empty liquid level marking line and then stop refueling, and record the oil quantity of the last time when the liquid level value did not reach the suction empty liquid level marking line as the minimum refueling quantity.

[0011] Optionally, the control and acquisition module is further configured to set the electric pump to the lowest electric pump speed, set the motor to the lowest motor speed, and monitor the liquid level value of the oil quantity during the process of the user refueling the electric drive to be tested, and determine the maximum refueling quantity value of the electric drive to be tested according to the liquid level value.

[0012] Optionally, the liquid level sensor further includes an air gap liquid level marking line. The control and acquisition module is configured to determine whether the liquid level value of the oil quantity reaches the air gap liquid level marking line during the process of the user refueling the electric drive to be tested. If the liquid level value does not reach the air gap liquid level marking line, continue refueling until the liquid level value reaches the air gap liquid level marking line, and record the oil quantity of the last time when the liquid level value did not reach the air gap liquid level marking line as the maximum refueling quantity.

[0013] Optionally, the electric drive refueling quantity test system further includes: a power supply, which is used to connect to the electric drive to be tested and supply power to the electric drive to be tested.

[0014] Optionally, the electric drive refueling quantity test system further includes:

[0015] an oil temperature control module, which is used to connect to the electric drive to be tested and adjust the oil temperature in the electric drive to be tested to a preset temperature.

[0016] Optionally, the oil temperature control module includes:

[0017] an oil cooler;

[0018] a water temperature control component, which is connected to the oil cooler through a connecting water pipe,

[0019] and the water temperature control component is configured to heat the coolant and make it circulate in the connecting water pipe to perform heat exchange with the oil cooler so as to adjust the oil temperature of the electric drive to be tested.

[0020] Optionally, the electric drive refueling quantity test system further includes: a reference table and a test table, the communicating vessel is arranged on the reference table; the electric drive to be tested is arranged on the test table;

[0021] The electric drive to be tested includes a first connector and a second connector. The distance from the first connector to the test bench is greater than the distance from the second connector to the test bench. The first opening is connected to the first connector through a first connecting oil pipe, and the second opening is connected to the second connector through a second connecting oil pipe.

[0022] Optionally, the test bench is an inclined test bench, and the inclined test bench is used to set the electric drive to be tested at a target inclination angle;

[0023] The control and acquisition module is used to determine the minimum fuel filling amount and the maximum fuel filling amount of the electric drive to be tested at the target inclination angle.

[0024] In a second aspect, the present invention also discloses a fuel filling amount testing method. The method is applied to the above-mentioned electric drive fuel filling amount testing system, and is characterized in that the method includes:

[0025] During the process of the user filling fuel into the electric drive to be tested, the liquid level sensor monitors the liquid level value of the oil in the electric drive to be tested, and sends the liquid level value to the control and acquisition module;

[0026] The control and acquisition module determines the minimum fuel filling amount and the maximum fuel filling amount of the electric drive to be tested according to the liquid level value.

[0027] The embodiments of the present invention have the following advantages:

[0028] In the embodiments of the present invention, by setting a liquid level sensor at the bottom of the communicating vessel, the liquid level value of the oil in the communicating vessel can be accurately detected. The control and acquisition module can determine the minimum fuel filling amount and the maximum fuel filling amount of the electric drive to be tested according to the liquid level value measured by the liquid level sensor, avoiding the error caused by subjective judgment and greatly improving the accuracy of fuel filling amount measurement; by connecting the electric drive to be tested with the communicating vessel, the oil in the electric drive and the oil in the communicating vessel will form a connected system. When the electric drive to be tested operates, the flow and pressure change of the oil will be correspondingly reflected in the communicating vessel, and at the same time, the communicating vessel can also play a role in balancing the oil pressure inside the electric drive, avoiding interference with the measurement result due to uneven pressure and ensuring the accuracy of liquid level measurement. Description of the Drawings

[0029] Figure 1 It is a structural block diagram of an electric drive fuel filling amount testing system provided by an embodiment of the present invention;

[0030] Figure 2 It is a structural block diagram of another electric drive fuel filling amount testing system provided by an embodiment of the present invention;

[0031] Figure 3 It is a structural block diagram of a fuel filling amount testing method provided by an embodiment of the present invention. Detailed Implementation Modes

[0032] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation modes.

[0033] One of the core concepts of the embodiments of the present invention is that the present invention can accurately detect the liquid level value of the oil in the communicating vessel by setting a liquid level sensor at the bottom of the communicating vessel. The control and acquisition module can determine the minimum and maximum refueling amounts of the electric drive to be measured according to the liquid level value, avoiding the errors caused by subjective judgment and greatly improving the accuracy of refueling amount measurement; by connecting the electric drive to be measured with the communicating vessel, the oil in the electric drive and the oil in the communicating vessel will form a connected system. When the electric drive operates, the flow and pressure changes of the oil will be correspondingly reflected in the communicating vessel, and the communicating vessel can also play a role in balancing the oil pressure inside the electric drive, avoiding interference with the measurement results due to uneven pressure and ensuring the accuracy of liquid level measurement.

[0034] Refer to Figure 1 , which shows a structural block diagram of an electric drive refueling amount testing system 10 provided by an embodiment of the present invention. The system is used to test the refueling amount of an electric drive 20 to be measured. The electric drive refueling amount testing system 10 may include:

[0035] A communicating vessel 101, which is connected to the electric drive to be measured. The communicating vessel includes a first opening 1011 and a second opening 1012. The first opening 1011 and the second opening 1012 are respectively used to connect with the electric drive 20 to be measured so that the oil of the electric drive 20 to be measured flows into the communicating vessel 101. A liquid level sensor 102 is arranged at the bottom of the communicating vessel, and the liquid level sensor is used to detect the liquid level value of the oil in the communicating vessel; the height of the first opening is higher than the height of the second opening;

[0036] A control and acquisition module 103, which is connected to the liquid level sensor. The control and acquisition module is used to obtain the liquid level value sent by the liquid level sensor and determine the minimum and maximum refueling amounts of the electric drive to be measured according to the liquid level value.

[0037] In the embodiments of the present invention, the electric drive 20 to be measured refers to an electric drive device that needs to test the oil filling amount, which may be a distributed electric drive, a gearbox, or other drive components that need lubrication or cooling; the communicating vessel 101 can be connected to the electric drive 20 to be measured through the first opening 1011 and the second opening 1012, thereby forming a U-shaped communicating vessel. The U-shaped communicating vessel can reflect the refueling amount of the electric drive 20 to be measured by virtue of its characteristics of balancing the liquid level and transmitting pressure.

[0038] It should be noted that the control acquisition module and the liquid level sensor can be connected through the communication cable A1. The first opening 1011 can be connected to the to-be-tested electric drive 20 through the first connecting oil pipe A2, and the second opening 1012 can be connected to the to-be-tested electric drive 20 through the second connecting oil pipe A3.

[0039] A liquid level sensor 102 is installed at the bottom of the communicating vessel 101. The liquid level sensor 102 can be used to detect the liquid level height of the oil in the communicating vessel in real time. The communicating vessel 101 serves as a transfer station for the oil circulation, receiving the oil flowing out during the operation of the to-be-tested electric drive 20. At the same time, the change in the liquid level of the oil reflects the total amount of the electric drive oil. The physical quantity is converted into a measurable liquid level value through the liquid level sensor 102, and then the liquid level value is transmitted to the control acquisition module 103;

[0040] The control acquisition module 103 can convert the liquid level value into an actual oil quantity value according to the preset liquid level - oil quantity relationship curve.

[0041] When the liquid level drops to a certain threshold, it can be determined as the minimum oil quantity required to maintain the lubrication / cooling of the electric drive. When the liquid level reaches another threshold, the system can determine it as the upper limit of the oil volume, that is, the maximum refueling quantity value.

[0042] It should be noted that the volume of the communicating vessel 101 is much smaller than the total oil quantity of the to-be-tested electric drive 20. Even if the oil flows into / out of the communicating vessel briefly, the impact on the total oil quantity can be ignored. The liquid level sensor can be a capacitive sensor or an ultrasonic sensor. Capacitive sensor: Utilize the difference in the dielectric constant between the oil and air, and sense the liquid level through the change in capacitance between the electrodes. Ultrasonic sensor: Emit ultrasonic waves and calculate the liquid level height based on the time of the reflected echo. Which one to specifically select is not limited here.

[0043] The present invention discloses an electric drive refueling quantity testing system. By setting a liquid level sensor at the bottom of the communicating vessel, the liquid level value of the oil in the communicating vessel can be accurately detected. The control acquisition module determines the minimum refueling quantity and the maximum refueling quantity of the to-be-tested electric drive according to the liquid level value, avoiding the error caused by subjective judgment and greatly improving the accuracy of the refueling quantity measurement; by connecting the to-be-tested electric drive to the communicating vessel, the oil inside the electric drive and the oil in the communicating vessel will form a connected system. When the electric drive operates, the flow and pressure change of the oil will be correspondingly reflected in the communicating vessel. At the same time, the communicating vessel can also play a role in balancing the oil pressure inside the electric drive, avoiding interference with the measurement result due to uneven pressure and ensuring the accuracy of the liquid level measurement.

[0044] In an embodiment of the present invention, the to-be-tested electric drive 20 includes an electric pump 201 and an electric motor 202; the control acquisition module is used to connect to the to-be-tested electric drive;

[0045] The control and acquisition module is used to set the electric pump to the highest electric pump speed, set the motor to the highest motor speed, monitor the liquid level value of the oil volume during the user's refueling process of the electric drive to be tested through the liquid level sensor, and determine the minimum refueling volume value of the electric drive to be tested according to the liquid level value.

[0046] In the embodiment of the present invention, as Figure 2 FIG. shows the structural block diagram of another electric drive refueling volume test system provided by the embodiment of the present invention. The electric drive to be tested includes an electric pump 201 and a motor 202; the minimum refueling volume is the minimum oil volume to ensure that the equipment can still maintain normal lubrication, cooling and operation under extreme working conditions (such as the highest speed). The control and acquisition module 103 can send an instruction to the electric pump to set the speed of the electric pump 201 to the highest electric pump speed. The highest electric pump speed means that the electric pump works at the maximum power and can transport the most oil liquid per unit time, so as to simulate the circulation and flow of the oil liquid in the electric drive under extreme working conditions.

[0047] The control and acquisition module 103 can send an instruction to the motor to set the speed of the motor 202 to the highest motor speed. The highest motor speed will cause the motor to generate the maximum heat, and the lubrication and cooling requirements for the oil liquid also reach the maximum, thus simulating the actual situation when the electric drive is operating under high load.

[0048] After the setting is completed, the operator can slowly refuel the electric drive 20 to be tested, and the oil liquid flows into the communicating vessel 101 through the first opening 1011 of the communicating vessel.

[0049] During the refueling process, the liquid level sensor continuously detects the liquid level value of the oil liquid in the communicating vessel and continuously sends these liquid level value data to the control and acquisition module. The control and acquisition module records and analyzes these liquid level values in real time.

[0050] During the refueling process, the control and acquisition module will determine the minimum refueling volume value according to the liquid level value and the preset judgment conditions. When the oil liquid inside the electric drive can meet the normal operation requirements of the electric pump and the motor at the highest speed, for example, the oil suction port can continuously and stably suck oil, all components of the motor can be fully lubricated and cooled, and the liquid level value feedback by the liquid level sensor reaches a stable and required state, the control and acquisition module considers that the condition for the minimum refueling volume is reached at this time.

[0051] The control and acquisition module calculates the corresponding refueling volume of the electric drive to be tested at this time through a preset algorithm according to the corresponding relationship between the liquid level value of the communicating vessel and the refueling volume, determines this refueling volume as the minimum refueling volume value, and records and stores it.

[0052] In an embodiment of the present invention, the liquid level sensor includes a suction-empty liquid level marking line 1021. The control and acquisition module is configured to determine whether the liquid level value of the oil quantity reaches the suction-empty liquid level marking line 1021 during the process of a user refueling the electric drive to be measured. If the liquid level value does not reach the suction-empty liquid level marking line, continue refueling until the liquid level value reaches the suction-empty liquid level marking line and then stop refueling, and record the oil quantity that did not reach the suction-empty liquid level marking line last time as the minimum refueling quantity.

[0053] In an embodiment of the present invention, the suction-empty liquid level marking line 1021 is the lowest safety liquid level set in a communicating vessel or a fuel tank. After receiving the liquid level value transmitted by the liquid level sensor, the control and acquisition module performs real-time comparison of it with the corresponding value of the preset suction-empty liquid level marking line. If the judgment result is that the liquid level value does not reach the suction-empty liquid level marking line, it indicates that the current oil quantity still does not meet the basic requirements for the normal operation of the electric drive. At this time, the control and acquisition module issues a "continue refueling" instruction (such as keeping the refueling equipment on), and the user or the refueling equipment continues to refuel. At the same time, the liquid level sensor continues to monitor the liquid level change in real time, and the control and acquisition module repeatedly executes the liquid level judgment action. When the liquid level sensor monitors that the liquid level value reaches the suction-empty liquid level marking line, the control and acquisition module determines that the refueling is up to standard and immediately issues a "stop refueling" instruction (such as turning off the refueling equipment). At the same time, the control and acquisition module records the oil quantity value corresponding to the last time when the liquid level did not reach the suction-empty liquid level marking line, and this value is the "minimum refueling quantity". This data can be used for subsequent analysis of the oil quantity consumption law of the electric drive, setting of refueling warning values, etc., to ensure that the electric drive is always in a reasonable oil quantity state and guarantee the operation safety and stability.

[0054] It should be noted that refueling can be carried out in the same step size. For example, refueling is carried out by adding 100 ml each time. When refueling with the lowest safety oil quantity in the electric drive to be measured, the initial lowest safety oil quantity plus the accumulated refueled oil quantity can be used as the minimum refueling quantity.

[0055] In an embodiment of the present invention, the control and acquisition module is further configured to set the electric pump to the lowest electric pump speed, set the motor to the lowest motor speed, and monitor the liquid level value of the oil quantity during the process of a user refueling the electric drive to be measured, and determine the maximum refueling quantity value of the electric drive to be measured according to the liquid level value.

[0056] In an embodiment of the present invention, the control and acquisition module 103 can send a speed control instruction to the electric pump, and adjust the operating state of the electric pump to the lowest electric pump speed by adjusting the driving power frequency or voltage of the electric pump. This operation can ensure that the electric pump transports oil liquid at the minimum flow rate during the process of refueling the electric drive to be measured, simulating the oil liquid circulation state under low load conditions, and avoiding the violent agitation of the oil liquid caused by too high an electric pump speed, which affects the accuracy of liquid level monitoring.

[0057] Similarly, the control acquisition module 103 can send instructions to the motor. Through control devices such as frequency converters and servo drivers, the motor is adjusted to the lowest motor speed. The setting of the lowest motor speed enables the motor to operate in a low-power state, reducing the interference of the motor operation on the oil level, and simultaneously simulating the maximum fuel filling amount of the electric drive to be measured under a specific low-load scenario.

[0058] When the user performs a fuel filling operation on the electric drive 20 to be measured, the liquid level sensor 102 continuously acquires the liquid level value of the oil. The liquid level sensor can convert the liquid level height into an electrical signal or a digital signal through technologies such as capacitance induction, ultrasonic ranging, and float-type liquid level detection.

[0059] The control acquisition module 103 receives the digital signal transmitted by the liquid level sensor in real time, analyzes and records the liquid level value, and analyzes the recorded liquid level value. As the fuel filling process progresses, the oil gradually fills the internal space of the electric drive to be measured. The control acquisition module 103 can determine whether the liquid level reaches the liquid level corresponding to the maximum fuel filling amount through an algorithm. When it is confirmed that the liquid level reaches the liquid level corresponding to the maximum fuel filling amount, the liquid level value at this time is read, and combined with the calibration parameters of the liquid level sensor (such as the liquid level - oil volume conversion formula), the maximum fuel filling amount value of the electric drive to be measured is calculated. This value represents the maximum oil volume that the electric drive to be measured can accommodate under the conditions of the lowest speed operation of the electric pump and the motor, and is used to evaluate the oil volume accommodation capacity of the electric drive and subsequent performance analysis.

[0060] In an embodiment of the present invention, the liquid level sensor further includes an air gap liquid level marking line 1022. The control acquisition module is used to determine whether the liquid level value of the oil volume reaches the air gap liquid level marking line 1022 during the process of the user filling the electric drive to be measured with oil. If the liquid level value does not reach the air gap liquid level marking line, continue to fill the oil until the liquid level value reaches the air gap liquid level marking line, and record the oil volume when it last did not reach the air gap liquid level marking line as the maximum fuel filling amount.

[0061] In the embodiment of the present invention, the air gap liquid level marking line 1022 refers to the highest safety liquid level set in the electric drive to be measured, corresponding to the maximum allowable filling height of the oil under static or dynamic conditions. The air gap liquid level marking line can be set according to the electric drive structure and operation requirements.

[0062] When the user starts the fuel filling operation on the electric drive to be measured, the liquid level sensor 102 works synchronously, and can convert the liquid level value into an electrical signal (such as voltage, current) or a digital signal, and transmit it to the control acquisition module 103 in real time;

[0063] The control acquisition module 103 receives the liquid level data in real time, compares it with the value of the preset air-gap liquid level identification line 1022. If the liquid level does not reach the air-gap liquid level identification line, it is determined that the refueling is not completed, and an instruction is sent to keep the refueling equipment running (such as turning on the fuel pump and opening the valve). During the refueling process, the liquid level sensor continuously monitors the liquid level until the liquid level reaches the air-gap liquid level identification line, and the control acquisition module 103 immediately sends an instruction to turn off the refueling equipment.

[0064] The control acquisition module 103 records the oil quantity value at the last non-compliance as the maximum refueling quantity. This data is stored in the module memory or uploaded to the system database to provide a reference for subsequent refueling, ensuring that the refueling quantity does not exceed the safety limit and guaranteeing the safe operation of the electric drive.

[0065] It should be noted that when refueling the electric drive to be tested, it can be carried out in the same step size. For example, refueling is carried out in increments of 100 ml each time. When the initial refueling quantity in the electric drive to be tested is V1, V1 plus the accumulated refueling quantity can be used as the maximum refueling quantity.

[0066] In an embodiment of the present invention, the electric drive refueling quantity test system further includes: a power supply 104. The power supply 104 is used to connect to the electric drive 20 to be tested, and the power supply 104 is used to supply power to the electric drive to be tested.

[0067] In the embodiment of the present invention, as Figure 2 , the power supply 104 can be connected to the power input terminal of the electric drive 20 to be tested through the high and low voltage cable A4, and can be started through the power control panel or remote instruction to make the electric drive 20 to be tested enter the working state. After the test is completed, the power is cut off according to the procedure.

[0068] During the test, the voltage or current can be dynamically adjusted according to the load change of the electric drive (such as simulating acceleration and deceleration) as needed to verify the stability of the oil quantity monitoring system under different working conditions.

[0069] The output current or power can be adjusted to match the energy consumption requirements of the electric drive to be tested at different speeds and loads. For example, when measuring the minimum refueling quantity of the electric drive 20 to be tested, at this time, it is necessary to set the electric drive to be tested to the maximum speed (such as the lowest motor speed), and the power supply needs to stably output the corresponding high power; similarly, when measuring the maximum refueling quantity of the electric drive 20 to be tested, at this time, it is necessary to set the electric drive 20 to the lowest speed, and the power supply 104 needs to output the corresponding low power.

[0070] In an embodiment of the present invention, the electric drive refueling quantity test system further includes: an oil temperature control module. The oil temperature control module is connected to the electric drive to be tested, and the oil temperature control module is used to adjust the oil temperature in the electric drive to be tested to a preset temperature.

[0071] In an embodiment of the present invention, the electric drive fuel injection volume test system may further include: an oil temperature control module 105. The oil temperature control module 105 is used to connect to the electric drive 20 to be tested. The oil temperature control module 105 undertakes a key environmental regulation function in the electric drive fuel injection volume test system. It can monitor in real time and precisely adjust the internal oil temperature of the electric drive to be tested to a preset temperature (such as 20°C, 50°C, 80°C, etc.). The specific temperature setting can be determined according to user requirements. The present invention can provide standardized environmental conditions for the electric drive fuel injection volume test under different working conditions, improving the reliability and comparability of test data.

[0072] In an embodiment of the present invention, the oil temperature control module 105 includes: an oil cooler 1051; a water temperature control component 1052. The water temperature control component is connected to the oil cooler through a connecting water pipe 1053. The water temperature control component is used to heat the coolant and make it circulate in the connecting water pipe to exchange heat with the oil cooler, so as to adjust the oil temperature of the electric drive to be tested.

[0073] In an embodiment of the present invention, the oil cooler 1051, as the core heat exchange component, has a dual-channel structure inside for oil and coolant, and heat transfer is carried out through a metal wall;

[0074] The water temperature control component 1052 is used to adjust the coolant temperature and transfer thermal energy through the connecting water pipe in a circulating manner;

[0075] The connecting water pipe 1053 forms a closed coolant circulation loop to ensure efficient heat transfer to the oil cooler.

[0076] In one example, according to the test requirements, it is necessary to set the oil temperature target value to 80°C. The water temperature control component 1052 can start the heater to raise the coolant temperature to the set temperature of 80°C. The high-temperature coolant transfers heat to the oil, causing its temperature to rise. The temperature sensor monitors the oil temperature in real time and feeds it back to the water temperature control component 1052. The coolant temperature is dynamically adjusted through the PID algorithm until the oil temperature stabilizes at the preset value

[0077] In another example, the oil temperature target value to be set is -20°C. Start the water temperature control component 1052 to cool the coolant to the target value of -20°C. The adjusted coolant is pumped into the oil cooler 1051 through the connecting water pipe 1053 and exchanges heat with the electric drive oil inside the oil cooler. The low-temperature coolant absorbs the heat of the oil, causing its temperature to drop. The temperature sensor monitors the oil temperature in real time and feeds it back to the water temperature control component 1052. The coolant temperature is dynamically adjusted through the PID algorithm until the oil temperature stabilizes at -20°C.

[0078] In an embodiment of the present invention, the electric drive fuel filling volume test system further includes: a reference table 106 and a test table 107. The connector 101 is disposed on the reference table 106. The electric drive to be tested is disposed on the test table 107. The electric drive 20 to be tested includes a first connector 203 and a second connector 204. The distance from the first connector 203 to the test table is greater than the distance from the second connector 204 to the test table. The first opening is connected to the first connector through a first connecting oil pipe, and the second opening is connected to the second connector through a second connecting oil pipe.

[0079] In an embodiment of the present invention, such as Figure 2 , the electric drive fuel filling volume test system may further include a reference table 106 and a test table 107. The connector 101 is disposed on the reference table 106, and the electric drive 20 to be tested is disposed on the test table 107. The reference table 106 and the test table 107 need to keep the heights of the electric drive 20 to be tested and the connector 101 consistent. The first connector 203 can be connected to the first opening 1011 through a first connecting oil pipe A2, and the second opening 1012 is connected to the second connector 204 through a second connecting oil pipe A3.

[0080] In an embodiment of the present invention, the test table is an inclined test table 107, and the inclined test table 107 is used to set the electric drive to be tested to a target inclination angle; a control and acquisition module 103, which is used to determine the minimum fuel filling volume and the maximum fuel filling volume of the electric drive to be tested at the target inclination angle.

[0081] In an embodiment of the present invention, the inclined test table 107 can be precisely adjusted within the range of 0° to 90° by motor drive. The inclined test table 107 can set the electric drive to be tested to different inclination angles, and then respectively obtain the minimum fuel filling volume and the maximum fuel filling volume of the electric drive 20 at different inclination angles through the control and acquisition module 103. Store the minimum / maximum fuel filling volume data at different inclination angles and generate a two-dimensional curve graph (such as the X-axis is the inclination angle and the Y-axis is the fuel volume). Analyze the influence law of the inclination angle on the fuel volume through a curve fitting algorithm (such as polynomial regression).

[0082] The combination of the inclined test table 107 and the control and acquisition module 103 extends the electric drive fuel filling volume test from a single horizontal working condition to a multi-dimensional inclined working condition, significantly improving the comprehensiveness and engineering practicability of the test. By precisely controlling the inclination angle and synchronously monitoring the fuel volume change, the system can provide key data support for the structural optimization, installation angle design and fault prevention of the electric drive.

[0083] In one example, an initial safe oil quantity is added to the electric drive 20 to be measured. The oil temperature can be controlled at 80 °C through the oil temperature control module 105. The attitude of the electric drive 20 to be measured is adjusted to +45° by the inclination test bench. The control acquisition module 103 can control the pump speed to 4500 rpm and the motor speed to 1600 rpm. After each boundary meets the requirements, the fuel injection quantity is adjusted, and the liquid level corresponding to each fuel injection quantity is read through the liquid level sensor 102. Finally, the minimum and maximum fuel injection quantities of the measured part are determined by the fuel injection quantities corresponding to the suction-empty liquid level and the air-gap liquid level.

[0084] It should be noted that the electric drive 20 to be measured may further include a fuel filling port 205 and an oil drain valve 206. The electric drive 20 to be measured can be refueled through the fuel filling port 205, and the electric drive can be drained through the oil drain valve 206.

[0085] The present invention discloses an electric drive fuel injection quantity test system. By setting a liquid level sensor at the bottom of the communicating vessel, the liquid level value of the oil in the communicating vessel can be accurately detected. The control acquisition module determines the minimum fuel injection quantity and the maximum fuel injection quantity of the electric drive to be measured according to the liquid level value, avoiding errors caused by subjective judgment and greatly improving the accuracy of fuel injection quantity measurement. By connecting the electric drive to be measured with the communicating vessel, the oil in the electric drive and the oil in the communicating vessel will form a connected system. When the electric drive operates, the flow and pressure changes of the oil will be correspondingly reflected in the communicating vessel. At the same time, the communicating vessel can also play a role in balancing the oil pressure inside the electric drive, avoiding interference with the measurement results due to uneven pressure and ensuring the accuracy of liquid level measurement.

[0086] For the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple. For related parts, refer to the partial description of the method embodiment.

[0087] Refer to Figure 3 , which shows a step flowchart of a fuel injection quantity test method provided by an embodiment of the present invention. This method is applied to the above-mentioned electric drive fuel injection quantity test system. The method may include the following steps:

[0088] Step 201, during the process of the user refueling the electric drive to be measured, the liquid level value of the oil quantity in the electric drive to be measured is monitored through the liquid level sensor, and the liquid level value is sent to the control acquisition module;

[0089] Step 202, the control acquisition module determines the minimum fuel injection quantity and the maximum fuel injection quantity of the electric drive to be measured according to the liquid level value.

[0090] The present invention discloses a fuel filling volume testing method. By arranging a liquid level sensor at the bottom of a communicating vessel, the present invention can accurately detect the liquid level value of the oil in the communicating vessel, and control the acquisition module to determine the minimum fuel filling volume and the maximum fuel filling volume of the electric drive to be tested according to the liquid level value, avoiding the error caused by subjective judgment and greatly improving the accuracy of fuel filling volume measurement; by connecting the electric drive to be tested with the communicating vessel, the oil in the electric drive and the oil in the communicating vessel will form a connected system. When the electric drive operates, the flow and pressure change of the oil will be correspondingly reflected in the communicating vessel, and at the same time, the communicating vessel can also play a role in balancing the oil pressure inside the electric drive, avoiding interference with the measurement result caused by uneven pressure and ensuring the accuracy of liquid level measurement.

[0091] In an embodiment of the present invention, the electric drive to be tested includes an electric pump and a motor; during the process of a user filling fuel into the electric drive to be tested, before monitoring the liquid level value of the oil volume in the electric drive to be tested by the liquid level sensor and sending the liquid level value to the control acquisition module, it further includes:

[0092] By the control acquisition module, set the electric pump to the highest electric pump speed and set the motor to the highest motor speed;

[0093] By the control acquisition module, determining the minimum fuel filling volume of the electric drive to be tested according to the liquid level value includes:

[0094] By the control module, judge whether the liquid level value of the oil volume reaches the suction empty liquid level marking line;

[0095] If the liquid level value does not reach the suction empty liquid level marking line, continue to fill fuel until the liquid level value reaches the suction empty liquid level marking line and stop filling fuel, and record the oil volume of the last time when the liquid level value did not reach the suction empty liquid level marking line as the minimum fuel filling volume.

[0096] In an embodiment of the present invention, during the process of a user filling fuel into the electric drive to be tested, before monitoring the liquid level value of the oil volume in the electric drive to be tested by the liquid level sensor and sending the liquid level value to the control acquisition module, it further includes: includes:

[0097] By the control acquisition module, set the electric pump to the lowest electric pump speed and set the motor to the lowest motor speed;

[0098] By the control acquisition module, determining the maximum fuel filling volume of the electric drive to be tested according to the liquid level value includes:

[0099] By the control acquisition module, judge whether the liquid level value of the oil volume reaches the air gap liquid level marking line;

[0100] If the liquid level value does not reach the air gap liquid level marking line, continue to fill fuel until the liquid level value reaches the air gap liquid level marking line, and record the oil volume of the last time when the liquid level value did not reach the air gap liquid level marking line as the maximum fuel filling volume.

[0101] In an embodiment of the present invention, the electric drive fuel filling amount testing system may further include an inclination test bench, and the method further includes:

[0102] Set the electric drive to be tested to a target inclination angle through the inclination test bench;

[0103] Determine the minimum fuel filling amount and the maximum fuel filling amount of the electric drive to be tested at the target inclination angle by controlling the acquisition module.

[0104] The present invention discloses a fuel filling amount testing method. By setting a liquid level sensor at the bottom of the communicating vessel, the present invention can accurately detect the liquid level value of the oil liquid in the communicating vessel, and control the acquisition module to determine the minimum fuel filling amount and the maximum fuel filling amount of the electric drive to be tested according to the liquid level value, avoiding the error caused by subjective judgment and greatly improving the accuracy of fuel filling amount measurement; by connecting the electric drive to be tested with the communicating vessel, the oil liquid inside the electric drive and the oil liquid inside the communicating vessel will form a connected system. When the electric drive operates, the flow and pressure change of the oil liquid will be correspondingly reflected in the communicating vessel, and at the same time, the communicating vessel can also play a role in balancing the oil liquid pressure inside the electric drive, avoiding interference with the measurement result due to uneven pressure and ensuring the accuracy of liquid level measurement.

[0105] The present invention discloses a fuel amount testing method. By setting a liquid level sensor at the bottom of the communicating vessel, the liquid level value of the oil liquid in the communicating vessel can be accurately detected. The acquisition module is controlled to determine the minimum fuel filling amount and the maximum fuel filling amount of the electric drive to be tested according to the liquid level value, avoiding the error caused by subjective judgment and greatly improving the accuracy of fuel filling amount measurement; by connecting the electric drive to be tested with the communicating vessel, the oil liquid inside the electric drive and the oil liquid inside the communicating vessel will form a connected system. When the electric drive operates, the flow and pressure change of the oil liquid will be correspondingly reflected in the communicating vessel, and at the same time, the communicating vessel can also play a role in balancing the oil liquid pressure inside the electric drive, avoiding interference with the measurement result due to uneven pressure and ensuring the accuracy of liquid level measurement.

[0106] It should be noted that for the method embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that the embodiments of the present invention are not limited by the described action sequence, because according to the embodiments of the present invention, certain steps can be carried out in other sequences 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 essential for the embodiments of the present invention.

[0107] Those skilled in the art should understand that the embodiments of the present invention can be provided as methods, devices, or computer program products. Therefore, the embodiments of the present invention can take the form of all-hardware embodiments, all-software embodiments, or embodiments combining software and hardware aspects. Moreover, the embodiments of the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0108] The embodiments of the present invention are described with reference to the flowcharts and / or block diagrams of methods, terminal devices (systems), and computer program products according to the embodiments of the present invention. It should be understood that each flow and / or block in the flowchart and / or block diagram, as well as the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processors of general-purpose computers, special-purpose computers, embedded processors, or other programmable data processing terminal devices to generate a machine, such that the instructions executed by the processors of the computer or other programmable data processing terminal devices generate means for implementing the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0109] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including instruction means that implement the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0110] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device, such that a series of operation steps are executed on the computer or other programmable terminal device to generate a computer-implemented process, so that the instructions executed on the computer or other programmable terminal device provide steps for implementing the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0111] Although the preferred embodiments of the embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications to these embodiments once they know the basic creative concepts. Therefore, the appended claims are intended to be construed as including the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present invention.

[0112] Finally, it should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or terminal device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or terminal device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or terminal device comprising the said element.

[0113] The above has introduced in detail an electric drive fuel injection quantity test system and a fuel injection quantity test method provided by the present invention. Specific examples are used in this text to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. An electric drive fuel filling volume test system, characterized in that For testing the fuel filling amount of an electric drive to be tested, the electric drive fuel filling amount testing system includes: A communicating vessel, which is used to connect with the electric drive to be tested. The communicating vessel includes a first opening and a second opening. The first opening and the second opening are respectively used to connect with the electric drive to be tested so that the oil of the electric drive to be tested flows into the communicating vessel. A liquid level sensor is arranged at the bottom of the communicating vessel, and the liquid level sensor is used to detect the liquid level value of the oil in the communicating vessel; the height of the first opening is higher than the height of the second opening; A control acquisition module, which is connected with the liquid level sensor. The control acquisition module is used to obtain the liquid level value sent by the liquid level sensor and determine the minimum fuel filling amount and the maximum fuel filling amount of the electric drive to be tested according to the liquid level value.

2. The electric drive fuel filling volume test system according to claim 1, wherein The electric drive to be tested includes an electric pump and a motor; the control acquisition module is used to connect with the electric drive to be tested; The control acquisition module is used to set the electric pump to the highest electric pump speed, set the motor to the highest motor speed, and monitor the liquid level value of the oil during the process of the user filling fuel into the electric drive to be tested, and determine the minimum fuel filling amount value of the electric drive to be tested according to the liquid level value.

3. The electric drive fuel filling volume test system according to claim 2, characterized in that, The liquid level sensor includes an air suction liquid level marking line. The control acquisition module is used to judge whether the liquid level value of the oil reaches the air suction liquid level marking line during the process of the user filling fuel into the electric drive to be tested. If the liquid level value does not reach the air suction liquid level marking line, continue to fill fuel until the liquid level value reaches the air suction liquid level marking line and stop filling fuel, and record the amount of oil that did not reach the air suction liquid level marking line last time as the minimum fuel filling amount.

4. The electric drive fuel filling amount testing system according to claim 2, wherein The control acquisition module is further used to set the electric pump to the lowest electric pump speed, set the motor to the lowest motor speed, and monitor the liquid level value of the oil during the process of the user filling fuel into the electric drive to be tested, and determine the maximum fuel filling amount value of the electric drive to be tested according to the liquid level value.

5. The electric drive fuel filling volume test system according to claim 2, wherein The liquid level sensor further includes an air gap liquid level marking line. The control acquisition module is used to judge whether the liquid level value of the oil reaches the air gap liquid level marking line during the process of the user filling fuel into the electric drive to be tested. If the liquid level value does not reach the air gap liquid level marking line, continue to fill fuel until the liquid level value reaches the air gap liquid level marking line, and record the amount of oil that did not reach the air gap liquid level marking line last time as the maximum fuel filling amount.

6. The electric drive fuel filling volume test system according to claim 1, wherein The electric drive fuel filling amount testing system further includes: a power supply, which is used to connect with the electric drive to be tested, and the power supply is used to supply power to the electric drive to be tested.

7. The electric drive fuel filling amount testing system according to claim 1, the electric drive fuel filling amount testing system further includes: An oil temperature control module, which is used to connect with the electric drive to be tested, and the oil temperature control module is used to adjust the oil temperature in the electric drive to be tested to a preset temperature.

8. The electric drive fuel filling volume test system according to claim 7, characterized in that The oil temperature control module includes: An oil cooler; A water temperature control component, and the water temperature control component is connected with the oil cooler through a connecting water pipe. The water temperature control component is used to heat the coolant and make it circulate in the connecting water pipe, and exchange heat with the oil cooler to adjust the oil temperature of the electric drive to be tested.

9. The electric drive fuel filling volume test system according to claim 1, characterized in that, The electric drive fuel filling amount testing system further includes: a reference table and a test table. The communicating vessel is arranged on the reference table, and the electric drive to be tested is arranged on the test table; The electric drive to be tested includes a first joint and a second joint. The distance from the first joint to the test table is greater than the distance from the second joint to the test table. The first opening is connected to the first joint through a first connecting oil pipe, and the second opening is connected to the second joint through a second connecting oil pipe.

10. The electric drive fuel filling volume test system according to claim 9, characterized in that, The test table is an inclined test table, and the inclined test table is used to set the electric drive to be tested at a target inclination angle; The control and acquisition module is used to determine the minimum fuel filling amount and the maximum fuel filling amount of the electric drive to be tested at the target inclination angle.

11. A fuel quantity testing method, characterized in that, The method is applied to the electric drive fuel filling amount testing system according to any one of claims 1-10, and is characterized in that the method includes: During the process of the user filling the electric drive to be tested with oil, the liquid level sensor monitors the liquid level value of the oil quantity in the electric drive to be tested, and sends the liquid level value to the control and acquisition module; The control and acquisition module determines the minimum fuel filling amount and the maximum fuel filling amount of the electric drive to be tested according to the liquid level value.

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