Engine oil pressure build-up time test system, method and sensor

Abstract

The application discloses an engine oil pressure building time test system, method and sensor, which comprises an ECU, a pressure sensor, a calibration tool, a rotating speed sensor, a computer, wherein the rotating speed sensor, the pressure sensor and the calibration tool are respectively connected with the ECU in signal connection; the calibration tool is used for collecting engine rotating speed and oil pressure signal data and is connected with the computer, so that the collected data is transmitted to the computer; and the computer is used for processing and analyzing the data transmitted by the calibration tool. The application has the advantages of simple structure, convenient use, easy operation, low cost and high test efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engine testing, in particular to an engine oil pressure build-up time testing system, method and sensor. BACKGROUND

[0002] When the engine is working, many transmission parts are in high-speed relative motion under small clearances, such as the crankshaft main journal and the main bearing, the crank pin and the connecting rod bearing, the supercharger bearing, the valve train pairs and the transmission gear pairs. Once the engine is running, if these parts cannot be lubricated in time, strong friction will occur between them, accelerating the wear of the working surface of the parts, and the working surface of the parts may also be burned due to the heat generated by friction, causing the engine to stop running. Therefore, after the engine is started, the oil pressure of each part of the engine lubricating oil circuit should be established as soon as possible and reach a certain pressure, so as to ensure good lubrication and cooling function and make the engine run well. The engine design generally has special requirements for the oil pressure build-up time of the engine remote lubrication parts such as the engine main bearing shell, the supercharger and the rocker shaft. The Yuchai specification requires that the time required for the oil pressure of these parts to reach 100kPa from starting is ≤5s.

[0003] At present, the oil pressure of the test bench is generally tested by using an ordinary pressure sensor, but the data acquisition frequency is low, and the shortest is 0.5s. There are too few data collected from the engine starting to the oil pressure reaching 100kPa, which is not easy to analyze and has too large error.

[0004] The disclosure of the above background art content is only used to assist in understanding the concept and technical solutions of the present application, and it does not necessarily belong to the prior art of the present patent application. In the absence of explicit evidence that the above content has been disclosed on the filing date of the present patent application, the above background art should not be used to evaluate the novelty and inventiveness of the present application. SUMMARY

[0005] The present application aims to provide an engine oil pressure build-up time testing system, method and sensor which are simple in structure, convenient to use, easy to operate, low in cost and high in testing efficiency.

[0006] To this end, the present application provides an engine oil pressure build-up time testing system, method and sensor.

[0007] Preferably, the present application can also have the following technical features:

[0008] The application discloses an engine pressure building time test system which comprises an ECU, a pressure sensor, a calibration tool, a rotating speed sensor and a computer, wherein the rotating speed sensor, the pressure sensor and the calibration tool are respectively connected with the ECU in signal connection; the calibration tool is used for collecting engine rotating speed and oil pressure signal data and is connected with the computer to transmit the collected data to the computer; and the computer is used for processing and analyzing the data transmitted by the calibration tool.

[0009] Further, the pressure sensor is an oil pressure sensor or a waterway pressure sensor.

[0010] Further, the system further comprises a pressure rubber tube, one end of the pressure rubber tube is connected with the pressure sensor, and the other end is connected with a part to be tested.

[0011] Further, the calibration tool is INCA software or other electric control calibration software.

[0012] Further, the computer processes and analyzes the data transmitted by the calibration tool through MAD software.

[0013] A pressure sensor applied to the test system comprises a connecting piece, a pressure rubber tube and a pressure sensor, the connecting piece is divided into a first connecting piece and a second connecting piece, the front end of the pressure rubber tube is connected with a part to be tested through the first connecting piece, and the rear end is connected with the test head of the pressure sensor through the second connecting piece.

[0014] Further, the connecting piece comprises a pressure connector and a nut, the pressure connector is provided with an axial through hole and a limiting end in the middle part, the nut is threadedly connected on the pressure connector, one end of the pressure connector connected with the nut is further provided with a connecting port for connecting the pressure rubber tube, and the screw hole of the nut is internally provided with a structure matched with the connecting port, so that when the nut is screwed on the pressure connector, the stepped structure of the nut is pressed on the outside of the pressure rubber tube, and the pressure rubber tube is pressed on the connecting port.

[0015] Further, the first connecting piece and the second connecting piece are of the same structure, and the connecting port is a tapered port or a convex.

[0016] Further, the system further comprises a sensor connector, the sensor connector is a hollow connector, and two ends of the sensor connector are respectively threadedly connected with the second connecting piece and the pressure sensor.

[0017] An engine oil pressure building time test method comprises the test system and further comprises the following steps:

[0018] 1) selecting a part to be tested, connecting the oil pressure sensor with the oil way of the part to be tested; starting the calibration software, connecting the calibration software with the engine ECU successfully, selecting the engine rotating speed and oil pressure parameters to be recorded, and starting the data recording function in advance;

[0019] 2) Start the engine, the engine from the stop to idle operating condition, run for a period of time, while collecting data, save the collected engine speed and oil pressure data of the tested part;

[0020] 3) The collected engine speed and oil pressure data of the tested part are imported into the MAD software on the computer for analysis, and the oil pressure and speed curves with time are made;

[0021] 4) A vertical scale "1" is set on the speed curve, the scale "1" is placed at the position where the speed suddenly changes from zero, and the corresponding time is t1 moment; a vertical scale "2" is set on the oil pressure curve, the scale "2" is placed at the position where the relative pressure is 100KPa, and the corresponding time is t2 moment; at this time, the time difference between the scale "1" and the scale "2" is the time for the oil pressure to rise from 0 to 100KPa.

[0022] The beneficial effects of the present application compared with the prior art include:

[0023] (1) The technical scheme of the present application has wide application range, not only can test the oil pressure building time of the engine, but also can test the pressure size and pressure building and change of the hydraulic pipeline and cooling water pipeline.

[0024] (2) By increasing a section of pressure hose, one end of the pressure hose is connected with the oil pressure sensor, the other end is connected with the oil channel of the supercharger or the rocker arm shaft or the main bearing bush that needs to be tested, and the oil pressure is transmitted; the length of the engine wire harness is reduced, the cost is reduced, and the pressure sensor is simple in structure, so that the test can be carried out at any time and any place on the whole vehicle outside the test bench and other places, and the installation and use are very simple and convenient, the staff does not need special training, and the staff can quickly use the pressure sensor for testing.

[0025] (3) By using the rapid processing capability of the ECU, after the oil pressure sensor is connected with the ECU, the oil pressure acquisition speed is 10ms / time, more pressure data can be obtained, and the measurement accuracy is high. DETAILED DESCRIPTION

[0026] Figure 1 is the oil pressure and speed curve with time of the present application.

[0027] Figure 2 is Figure 1 the intersection value of the scale "1", the scale "2" and the oil pressure curve and the speed curve in the figure.

[0028] Figure 3 is the test system structure diagram of the present application.

[0029] Figure 4 is a front view of a pressure sensor of the present application.

[0030] Figure 5 is a sectional view of a pressure sensor of the present application.

[0031] Figure 6 is an enlarged view of a part of a pressure sensor of the present application. DETAILED DESCRIPTION

[0032] The present application will be further described with reference to the detailed description and drawings. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope of the application or its applications.

[0033] With reference to the following drawings, non-limiting and non-exclusive embodiments will be described, in which the same reference numerals refer to the same parts, unless otherwise specified.

[0034] Figure 3 An engine pressure build-up time test system is shown, comprising an ECU, an oil pressure sensor, a calibration tool, a speed sensor, a computer, the speed sensor, the oil pressure sensor, the calibration tool are respectively connected with the ECU in signal; the calibration tool is used to collect engine speed, oil pressure signal data, and is connected with the computer, and the collected data is transmitted to the computer; the computer is used for processing and analyzing the data transmitted by the calibration tool. Preferably, in order to save the length of the wire harness, a pressure hose is arranged at the oil pressure sensor, and the other end of the pressure hose is connected with the part to be tested. During testing, the length of the wire harness connected between the oil pressure sensor and the ECU meets the connection of the main oil passage, and the oil pressure build-up time test of the main oil passage can be performed. When testing the oil pressure build-up time of the supercharger, the rocker shaft, the main bearing and other parts, the length of the wire harness connected between the oil pressure sensor and the ECU cannot meet the requirement, at this time, a pressure hose is added, one end of the pressure hose is connected with the oil pressure sensor, and the other end is connected with the oil passage of the supercharger or the rocker shaft or the main bearing to be tested, and the oil pressure is transmitted. In this way, the oil pressure build-up time of multiple target parts can be tested using a shorter wire harness. The ECU obtains the engine speed through the speed sensor, and then judges the position of the sudden change of the engine speed from zero. The ECU obtains the oil pressure of the tested part through the oil pressure sensor, and the oil pressure sensor comprises a main oil passage oil pressure sensor or a supercharger oil pressure sensor or a rocker shaft oil pressure sensor or a main bearing oil pressure sensor. By using the fast processing capability of the ECU, after the oil pressure sensor is connected with the ECU, the oil pressure acquisition speed is 10ms / time, more pressure data can be obtained, and the measurement accuracy is high.

[0035] Preferably, the calibration tool is INCA software or other electronic control calibration software. The computer processes and analyzes the data transmitted by the calibration tool through the MAD software.

[0036] In combination Figures 4-6 A pressure sensor, which is an oil pressure sensor, is applied in the test system, and comprises a connecting piece, a pressure hose 4 and a pressure sensor 6. The connecting piece is divided into a first connecting piece 10 and a second connecting piece 11. The front end of the pressure hose 4 is connected with the oil passage of the tested part 1 through the first connecting piece 10, and the rear end is connected with the test head of the pressure sensor 6 through the second connecting piece 11. When the sensor is used, the first connecting piece 10 is connected with the oil passage of the tested part 1, so that the oil of the tested part is in contact with the test head of the pressure sensor 6 through the pressure hose 4, and the oil pressure of the tested part is measured. When the oil passage of the tested part such as a supercharger, a rocker shaft and a main bearing is tested, the pressure sensor is connected with the tested part through the pressure hose 4, so that the length of the engine wire harness is reduced, the cost is reduced, the structure of the pressure sensor 6 is simple, the test can be performed at any time and any place on the whole vehicle outside the test bench and other places, and the installation and use are very simple and convenient. The staff does not need special training, and can quickly use the pressure sensor for test.

[0037] Specifically, the connecting piece comprises a pressure connector 2 and a nut 3. The pressure connector 2 is provided with an axial through hole, a limiting end in the middle, and threads at both ends. The nut 3 is threadedly connected to one end of the pressure connector 2. The end of the pressure connector 2 connected with the nut 3 is further provided with a connecting port for connecting the pressure hose 4. The connecting port is a tapered port or a protrusion, which facilitates the connection of the pressure hose 4. Correspondingly, the screw hole of the nut 3 is internally provided with a stepped structure matched with the connecting port. When the nut 3 is screwed on the pressure connector 2, the stepped structure of the nut 3 is pressed on the outside of the pressure hose 4, so as to press the pressure hose 4 on the connecting port. Preferably, the first connecting piece 10 and the second connecting piece 11 have the same structure. When the pressure connector 2 and the pressure hose 4 are connected, the pressure hose 4 is passed through the nut 3 and then is sleeved on the connecting port of the pressure connector 2. Then the nut 3 is screwed on the pressure connector 2, so that the pressure hose 4 is locked by the nut 3. The connection mode of the pressure connector 2 and the pressure hose 4 is simple and firm, and the test efficiency is significantly improved. When used, the other end of the first connecting piece 10 is connected with the tested part.

[0038] In the preferred embodiment, a sensor connector 5 is further included, and the second connecting piece 11 is connected with the pressure sensor 6 through the sensor connector 5. The two ends of the sensor connector 5 are threadedly connected with the second connecting piece and the pressure sensor respectively. The sensor connector plays a transition role.

[0039] In combinationFigures 1-2 A method for testing engine oil pressure build-up time, comprising the test system described above, further comprising the following steps:

[0040] 1) Select the tested component, connect the oil pressure sensor with the oil line of the tested component; connect the notebook computer with the calibration software and the bench line (or vehicle line) communication interface with the electronic control calibration tool, power on the engine and ECU, start the electronic control calibration software, make the calibration software and engine ECU successfully connected, select the engine speed and oil pressure parameters to be recorded on the calibration software, and start the data recording function in advance;

[0041] 2) Start the engine, and the engine runs from the stop to the idle operating condition for 27-34s, and the engine speed and the oil pressure data of the tested part are collected and saved; the ECU obtains the engine speed through the speed sensor, and the ECU obtains the oil pressure of the tested part through the oil pressure sensor;

[0042] 3) Import the collected engine speed and oil pressure data of the tested part into the MAD software on the computer for analysis, and make the oil pressure and speed-time curve;

[0043] 4) Set the vertical scale "1" on the speed curve, and the scale "1" is placed at the position where the speed suddenly changes from zero (i.e. the engine starting time), and the corresponding time is t1; set the vertical scale "2" on the oil pressure curve, and the scale "2" is placed at the position where the relative pressure is 100KPa, and the corresponding time is t2; at this time, the time difference between the scale "1" and the scale "2" is the oil pressure build-up time from 0 to 100KPa.

[0044] The engine is an electronic control engine.

[0045] In Figure 1 The oil pressure and speed-time curve, the oil pressure curve mark 40, the speed curve mark 50, the scale "1" mark 20, and the scale "2" mark 30. Figure 1 The left vertical value in the table represents the oil pressure, and the unit is Bar; the horizontal value represents the time, and the unit is second. The intersection of the scale "1" and the speed curve is at the engine starting time, at which the engine speed suddenly changes from 0; the intersection of the scale "2" and the oil pressure curve is at the position where the relative pressure is 100KPa, at which the target oil pressure reaches the requirement. The specific values are referred to Figure 2 .

[0046] Those skilled in the art will appreciate that numerous variations are possible from the foregoing description, and therefore the embodiments and drawings are merely illustrative of one or more particular embodiments.

[0047] While there have been described and illustrated what are considered to be exemplary embodiments of the present application, it will be understood by those skilled in the art that various changes and modifications can be made therein without departing from the spirit of the application. Furthermore, it is also contemplated that many modifications can be made to adapt a particular situation to the teachings of the application without departing from the central concept of the present application. Therefore, it is intended that this application not be limited to the particular embodiments disclosed, but that the application include all embodiments falling within the scope of the application.

Claims

1. An engine oil pressure build-up time test method, which is applied to an engine oil pressure build-up time test system, the test system comprising an ECU, an oil pressure sensor, a calibration tool, a speed sensor, a computer, the speed sensor, the oil pressure sensor, the calibration tool being respectively connected with the ECU in signal; the calibration tool is used for collecting engine speed, oil pressure signal data, and is connected with the computer, and the collected data is transmitted to the computer; the computer is used for processing and analyzing the data transmitted by the calibration tool; The oil pressure sensor comprises a main oil passage oil pressure sensor or a supercharger oil pressure sensor or a rocker shaft oil pressure sensor or a main bearing shell oil pressure sensor; It also comprises a pressure hose, one end of which is connected with the pressure sensor, and the other end is connected with the part to be tested; characterized in that The test method comprises the following steps: 1) Select the tested part, connect the oil pressure sensor with the oil circuit of the tested part; start the calibration software, make the calibration software and the engine ECU connect successfully, select the engine speed and oil pressure parameters to be recorded, and start the data recording function in advance; 2) Start the engine, and the engine runs from stop to idle operating condition for a period of time, and the data collection is carried out at the same time, and the collected engine speed and oil pressure data of the tested part are saved; 3) The collected engine speed and oil pressure data of the tested part are imported into the MAD software on the computer for analysis, and the oil pressure and speed curves with time are made; 4) A vertical scale "1" is set on the speed curve, which is placed at the position where the speed suddenly changes from zero, and the corresponding time is t1 moment; a vertical scale "2" is set on the oil pressure curve, which is placed at the position where the relative pressure is 100KPa, and the corresponding time is t2 moment; at this time, the time difference between the scale "1" and the scale "2" is the oil pressure build-up time from 0 to 100KPa.

2. A method of testing engine oil pressure build-up time as claimed in claim 1, wherein: The calibration tool is INCA software or other electronic control calibration software.

3. A method of testing engine oil pressure build-up time as claimed in claim 1, wherein: The computer processes and analyzes the data transmitted by the calibration tool through the MAD software.

4. An oil pressure sensor for use in the test method of claim 1, characterized by: The connecting piece, the pressure hose, the first connecting piece and the second connecting piece are provided, the front end of the pressure hose is connected with the tested part through the first connecting piece, and the rear end is connected with the test head of the oil pressure sensor through the second connecting piece; The connecting piece comprises a pressure connector and a nut, the pressure connector is provided with an axial through hole, and a limiting end is arranged in the middle part; the nut is threadedly connected on the pressure connector; one end of the pressure connector connected with the nut is further provided with a connecting port for connecting the pressure hose; the inside of the screw hole of the nut is provided with a structure matched with the connecting port, so that when the nut is screwed on the pressure connector, the stepped structure of the nut is pressed on the outside of the pressure hose, and the pressure hose is pressed on the connecting port.

5. An oil pressure sensor as claimed in claim 4, characterised in that: The first connecting piece and the second connecting piece have the same structure; the connecting port is a tapered port or a protrusion.

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