An oil weighing, filling and sampling device for engine bench test

Abstract

The present invention discloses an oil weighing, filling and sampling device for engine bench tests, comprising: an oil storage tank suspended by a tension sensor; a first pipeline connecting the upper part of the oil storage tank and the engine oil sump; a solenoid valve B, a metering oil pump A, and a solenoid valve C connected in series on the first pipeline in sequence; branch pipe ports A and B are respectively provided on the pipelines at both ends of the metering oil pump A, and a solenoid valve A and a solenoid valve D are respectively connected in series on the branches where the pipe ports A and B are located; a second pipeline connecting the bottom of the oil storage tank and the engine oil sump; a metering oil pump B and a solenoid valve G connected in series on the second pipeline in sequence; branch pipe ports C and D are respectively provided on the pipelines at both ends of the metering oil pump B, and a solenoid valve E and a solenoid valve F are respectively connected in series on the branches where the pipe ports C and D are located. The present invention realizes the automatic control and recording of multiple working modes, and the test is fast, convenient and safe.

Description

Technical Field

[0001] The present invention relates to the field of engine detection, and particularly relates to an oil weighing, filling and sampling device for engine bench tests. Background Art

[0002] During the engine bench test, it is necessary to monitor the engine oil. Currently, some engine bench tests specifically for evaluating the performance of lubricating oil also require regular sampling and testing of the engine oil. Sampling and testing analysis of the engine oil can effectively reflect the operating conditions of the engine and the engine oil, and play an important role in evaluating the performance of the engine and the engine oil.

[0003] However, there are some problems with engine oil sampling during the current bench test.

[0004] I. Problems existing in engine oil filling during bench tests.

[0005] In engine bench tests, currently, most engine oil filling is carried out using the most traditional filling method, that is, directly pouring the engine oil from the oil filling port of the engine cylinder head cover. This method has many drawbacks. For example, during the pouring process, first, the engine oil filling volume of heavy-duty engines is often very large (mostly more than 20 kilograms or even 30 kilograms), and a standard oil barrel weighs about 17 kilograms, while the oil filling port of heavy-duty engines is often more than 1.5 meters high, which results in time-consuming and laborious manual engine oil filling; second, it is very difficult for manual operation to control the pouring speed. If the pouring is too slow, it is time-consuming and laborious, and if the pouring is too fast, it is very easy to overflow. Once the engine oil overflows during pouring, the actual engine oil filling volume will be inaccurate and cannot meet the ideal filling requirements.

[0006] II. Problems existing in engine oil sampling during bench tests.

[0007] In engine bench tests, sampling the engine oil for physical and chemical analysis is often key data for evaluating the engine operation and the wear state of components. Especially for bench tests with engine oil as the research object, it is necessary to frequently take oil samples without stopping the engine during its operation. When the engine is running, there are many high-temperature and high-pressure areas around it, and at the same time, the flywheel, pulley and transmission shaft rotate at high speed. If the sampling operator is slightly careless, they will face extremely serious mechanical injuries, which is quite dangerous. At the same time, the operation of the engine is accompanied by a lot of noise, which causes great damage to the human ear's hearing. Currently, the engine oil sampling is usually to install a manual ball valve at the bottom of the oil pan. When the sampling operator conducts the sampling operation, they have to get close to the high-speed rotating engine, and thus will face all the above-mentioned safety problems. In addition, the sampling quantity usually has relatively strict regulations. It is very difficult for manual operation to control the oil discharging time, and it is difficult to ensure the sampling quantity, which will have more or less impact on the continuation of the test.

[0008] III. Problems existing in engine oil draining during bench tests.

[0009] In some tests with high requirements for engine oil weight, such as the engine oil consumption test (which is an important test for evaluating the degree of engine oil burning), it is necessary to weigh the engine oil before and after the test with relatively high precision. At present, the engine oil consumption test mainly relies on gravity to drain oil from the oil pan, and this way of draining oil has great drawbacks. Generally, the temperature during the oil draining process of the engine oil consumption test needs to be strictly controlled because the temperature of the engine oil affects its viscosity, the viscosity affects the fluidity of the engine oil, and the fluidity directly affects whether the oil draining is thorough. The gravity oil draining process often takes 30 minutes or even longer, which will cause the engine oil temperature to gradually become cold, lose fluidity, and not be drained completely. Especially in the case of lower ambient temperatures, this problem becomes more serious. Therefore, there is an urgent need for a device for rapid oil draining to ensure the consistency of the oil draining situation during the test.

[0010] In summary, there are great problems in the engine oil filling, weighing, and sampling during the current engine bench test. Existing solutions often focus on optimizing only one aspect, and there is no integrated system device that combines filling, weighing, oil draining, and sampling. Summary of the Invention

[0011] The object of the present invention is to provide an engine oil weighing, filling, and sampling device for engine bench tests, which solves the problems related to engine oil operations during engine bench tests, including:

[0012] (1) The problem that the engine oil filling operation is inconvenient and time-consuming;

[0013] (2) The problem that the amount of engine oil filled is inaccurate;

[0014] (3) The problem that the amount of oil sample taken is inaccurate;

[0015] (4) The safety problem of the operator when taking the oil sample;

[0016] (5) The problem that the engine oil drains slowly, affecting the accuracy of oil draining.

[0017] The technical solution of the present invention is:

[0018] An engine oil weighing, filling, and sampling device for engine bench tests, comprising:

[0019] An oil storage tank, suspended by a tension sensor;

[0020] A first pipeline, connecting the upper part of the oil storage tank with the engine oil pan; a solenoid valve B, a metering oil pump A, and a solenoid valve C are sequentially connected in series on the first pipeline; pipeline ports A and B are respectively provided on the pipelines at both ends of the metering oil pump A, and a solenoid valve A and a solenoid valve D are respectively connected in series on the branches where the pipeline ports A and B are located;

[0021] The second pipeline is connected to the bottom of the oil storage tank and the engine oil sump; a metering oil pump B and a solenoid valve G are sequentially connected in series on the second pipeline; pipeline ports C and D are respectively provided on the pipelines at both ends of the metering oil pump B, and a solenoid valve E and a solenoid valve F are respectively connected in series on the branches where the pipeline ports C and D are located.

[0022] Preferably, a check valve A is further connected in series on the first pipeline between the oil storage tank and the solenoid valve B; a check valve B is further connected in series on the second pipeline between the engine oil sump and the solenoid valve G.

[0023] Preferably, the top of the oil storage tank is connected to the cylinder head cover of the engine through a pressure balance pipe.

[0024] Preferably, it further includes a control and recording module and a multi-channel relay; the control and recording module respectively controls each solenoid valve and metering oil pump through a relay, and the control and recording module is further connected to a tension sensor to receive tension signal data.

[0025] Preferably, the tension sensor is further connected to a digital display module to display the tension signal data.

[0026] Preferably, the control modes of the control and recording module for each solenoid valve and metering oil pump include:

[0027] (1) Weighing new oil: Connect the oil pipe port A to the new oil barrel, open the metering oil pump A and the solenoid valves A and B, and close the other metering oil pumps and solenoid valves;

[0028] (2) Sampling new oil: Connect the oil pipe port C to the sampling bottle, open the metering oil pump B and the solenoid valve E, and close the other metering oil pumps and solenoid valves;

[0029] (3) Filling new oil: Open the metering oil pump B and the solenoid valve G, and close the other metering oil pumps and solenoid valves;

[0030] (4) Sampling used oil, specifically divided into:

[0031] ① Draining dead zone oil before sampling: Open the metering oil pump A and the solenoid valves B and C, and close the other metering oil pumps and solenoid valves;

[0032] ② Sampling: Connect the oil pipe port B to the sampling bottle, open the metering oil pump A and the solenoid valves C and D, and close the other metering oil pumps and solenoid valves;

[0033] ③ Adding back dead zone oil after sampling: Open the metering oil pump B and the solenoid valve G, and close the other metering oil pumps and solenoid valves;

[0034] (5) Weighing used oil: Open the metering oil pump A and the solenoid valves B and C, and close the other metering oil pumps and solenoid valves;

[0035] (6)Drainage of the liquid storage tank: Connect the oil pipe port C to the waste liquid bucket, turn on the metering oil pump B and the solenoid valve E, and turn off the other metering oil pumps and solenoid valves;

[0036] (7)Direct filling: Connect the oil pipe port D to the new oil bucket, turn on the metering oil pump B and the solenoid valves F and G, and turn off the other metering oil pumps and solenoid valves;

[0037] (8)Direct oil discharge: Connect the oil pipe port B to the oil bucket, turn on the metering oil pump A and the solenoid valves C and D, and turn off the other metering oil pumps and solenoid valves.

[0038] Preferably, the control and recording module's control modes for each solenoid valve and metering oil pump also include: (9) Cleaning of the liquid storage tank, specifically divided into:

[0039] ① Pump the cleaning agent in: Connect the oil pipe port A to the cleaning agent bucket, turn on the metering oil pump A and the solenoid valves A and B, and turn off the other metering oil pumps and solenoid valves;

[0040] ② Pump the cleaning agent out: Connect the oil pipe port C to the oil bucket, turn on the metering oil pump B and the solenoid valve E, and turn off the other metering oil pumps and solenoid valves.

[0041] Preferably, the control and recording module sets the required control modes for each metering oil pump, solenoid valve, and relay, and then sets the opening duration of the metering oil pump and solenoid valve according to the needs of the test.

[0042] The advantages of the present invention are:

[0043] (1)The oil weighing, filling, and sampling device for engine bench tests of the present invention mainly consists of an oil storage tank, pipelines, metering oil pumps, solenoid valves, and a tension sensor, and communicates with the bench control and recording equipment to achieve automated control and recording of multiple working modes, making the test fast, convenient, and safe.

[0044] (2)The present invention installs check valves to prevent the backflow of oil in the pipelines, making the oil in the pipelines in a full state, ensuring that the metering oil pump can pump oil immediately after starting, and avoiding the idling of the metering oil pump during startup and inaccurate pumping volume.

[0045] (3)The present invention utilizes a pressure balance pipe to balance the pressure between the engine crankcase and the oil storage tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The present invention will be further described below in conjunction with the drawings and embodiments:

[0047] Figure 1 is the structural schematic diagram of the oil weighing, filling, and sampling device of the present invention;

[0048] Figure 2 is the communication schematic diagram of each component of the present invention with the bench computer. Detailed implementation mode

[0049] As Figure 1 shown, an engine oil weighing, filling and sampling device for engine bench test proposed by the present invention mainly consists of an oil storage tank, two pipelines, two metering oil pumps, two one-way valves, seven solenoid valves and a tension sensor. The specific connection mode is as follows.

[0050] The oil storage tank is suspended by a tension sensor; the tension sensor is also connected with a digital display module to display the tension signal data.

[0051] The first pipeline is connected to the upper part of the oil storage tank and the engine oil sump; solenoid valve B, metering oil pump A and solenoid valve C are successively connected in series on the first pipeline; branch pipe ports A and B are respectively arranged on the pipelines at both ends of the metering oil pump A, and solenoid valve A and solenoid valve D are successively connected in series on the branches where the pipe ports A and B are located.

[0052] The second pipeline is connected to the bottom of the oil storage tank and the engine oil sump; metering oil pump B and solenoid valve G are successively connected in series on the second pipeline; branch pipe ports C and D are respectively arranged on the pipelines at both ends of the metering oil pump B, and solenoid valve E and solenoid valve F are successively connected in series on the branches where the pipe ports C and D are located.

[0053] One-way valve A is also connected in series between the oil storage tank and solenoid valve B on the first pipeline; one-way valve B is also connected in series between the engine oil sump and solenoid valve G on the second pipeline. Since the oil pumping volume is determined by the opening time of the metering oil pump, the one-way valve is installed to prevent the engine oil in the pipeline from flowing back, so that the engine oil in the pipeline is in a full state, ensuring that the oil can be pumped immediately after the metering oil pump starts, and avoiding the metering oil pump from idling during the opening process so that the pumped volume is inaccurate.

[0054] The top of the oil storage tank is connected to the cylinder head cover of the engine through a pressure balance pipe. Since both the engine crankcase and the oil storage tank are relatively sealed spaces, and pumping oil may cause excessive pressure at one end or too little pressure at one end, on the one hand, it will increase the pumping load, and on the other hand, it will affect the pressure of the engine crankcase, thus affecting the accuracy of the pumped volume and the accuracy of test-related data collection. Therefore, a pressure balance pipe is used to balance the pressure between the engine crankcase and the oil storage tank to reduce the influence brought by the above problems.

[0055] Figure 1 The specifications (parameters) of each component in can be determined according to specific test requirements. For example, the flow rate of the metering oil pump, the size of the solenoid valve and the one-way valve, the inner diameter (material) of the pipeline and the range of the tension sensor, etc. can be determined according to the engine oil storage volume and the accuracy requirements of the test.

[0056] There are many components in the device of the present invention and the installation is relatively complex. Therefore, it is necessary to design a support frame to assist in the construction and assembly. At the same time, it is necessary to minimize the impact on the components caused by the vibration of the engine. Therefore, an appropriate shock absorption solution is required, such as adding shock pads at the bottom of the support frame and other measures.

[0057] The device of the present invention further includes a control and recording module and a multi-way relay; the control and recording module controls each solenoid valve and metering oil pump through a relay respectively, and the control and recording module is also connected to a tensile force sensor to receive tensile force signal data.

[0058] The control and recording module of this embodiment consists of a bench computer. It is necessary to set the required control mode in advance according to the relay combination of the components presented in the table, and then set the corresponding parameters according to the needs of the test, such as the opening duration of the metering oil pump and solenoid valve and other parameters, and set the corresponding duration value according to the actual required pump oil volume. The communication between each component of the invention and the bench computer is as Figure 2 shown.

[0059] The bench computer has a total of 9 working modes for controlling each solenoid valve and metering oil pump, which are realized by opening or closing each component. The specific working modes and control principles are shown in the following table:

[0060]

[0061] Among them, each mode is described as follows:

[0062] (1) Weigh new oil:

[0063] a. "New oil" generally refers to the oil to be filled before the test;

[0064] b. The filling volume of new oil is determined by the opening time of metering oil pump A, and the volume of the liquid storage tank is the upper limit of the filling volume and an alarm value is set.

[0065] (2) Sample new oil: The sampling volume is determined by the opening time of metering oil pump B.

[0066] (3) Fill new oil: The filling volume of new oil is determined by the opening time of metering oil pump B.

[0067] (4) Sample old oil, specifically divided into:

[0068] ① Drain dead zone oil before sampling:

[0069] a. In order to eliminate the interference of the residual dead zone oil in the pipeline from the oil sump to the sampling port, the dead zone oil is first pumped into the storage oil tank for storage;

[0070] b. The amount of drained dead zone oil is determined by the opening time of metering oil pump A.

[0071] ② Sampling:

[0072] a. "Used oil" generally refers to the oil that has been in operation;

[0073] b. The sampling quantity is determined by the opening time of the metering oil pump A;

[0074] ③ Add the dead - zone oil back after sampling: Whether to add the dead - zone oil back to the engine depends on the situation. If all the dead - zone oil is added back, it is necessary to ensure that the opening time of the metering oil pump B is sufficient.

[0075] (5) Weigh the used oil: Usually, all the oil in the engine oil pan is pumped back into the storage tank, and it is necessary to ensure that the opening time of the metering oil pump A is sufficient.

[0076] (6) Drain the liquid storage tank: Usually, all the oil in the liquid storage tank is drained for the next filling. Ensure that the opening time of the metering oil pump B is sufficient. If the used oil is to be retained, other containers can be selected and placed at the oil pipe port C.

[0077] (7) Direct filling:

[0078] a. The oil of known weight is directly filled into the engine without passing through the storage tank. Ensure that the opening time of the metering oil pump B is sufficient to pump out the oil in the new oil barrel;

[0079] b. "New oil" generally refers to the oil to be filled before the test.

[0080] (8) Direct draining: Directly drain the oil in the engine oil pan without weighing. Ensure that the opening time of the metering oil pump A is sufficient to pump out the oil in the oil pan.

[0081] (9) Clean the liquid storage tank, specifically divided into:

[0082] ① Pump the cleaning agent in: The amount of the cleaning agent pumped in is determined by the opening time of the metering oil pump A. The volume of the liquid storage tank is the upper limit of the pumped - in amount and an alarm value is set;

[0083] ② Pump the cleaning agent out: Usually, all the cleaning agent in the liquid storage tank is pumped out. Ensure that the opening time of the metering oil pump B is sufficient. Repeat ①② until the cleaning agent is clean.

[0084] The above - mentioned embodiments are only for illustrating the technical concept and features of the present invention. The purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. All modifications made according to the spirit of the main technical solution of the present invention should be covered within the protection scope of the present invention.

Claims

1. An oil weighing, filling and sampling device for engine bench testing, characterized in that: include: The oil storage tank is suspended by a tension sensor; The first pipeline connects the upper part of the oil storage tank with the engine oil pan; the first pipeline is connected in series with a solenoid valve B, a metering oil pump A, and a solenoid valve C in sequence; the pipelines at both ends of the metering oil pump A are respectively provided with branched pipeline ports A and pipeline ports B, and the branches where pipeline ports A and pipeline ports B are located are respectively connected in series with a solenoid valve A and a solenoid valve D; The second pipeline connects the bottom of the oil storage tank with the engine oil pan; the second pipeline is connected in series with a metering oil pump B and a solenoid valve G in sequence; the pipelines at both ends of the metering oil pump B are respectively provided with branched pipeline ports C and pipeline ports D, and the branches where pipeline ports C and pipeline ports D are located are respectively connected in series with solenoid valves E and solenoid valves F; A one-way valve A is also connected in series between the oil storage tank and the solenoid valve B on the first pipeline; a one-way valve B is also connected in series between the engine oil pan and the solenoid valve G on the second pipeline; The top of the oil storage tank is connected to the cylinder head cover of the engine through a pressure balance pipe.

2. The oil weighing, filling and sampling device for engine bench testing according to claim 1, characterized in that: It also includes a control and recording module and a multi-way relay; the control and recording module is connected to control each solenoid valve and a quantitative oil pump through a relay, and the control and recording module is also connected to a tension sensor to receive tension signal data.

3. The oil weighing, filling and sampling device for engine bench testing according to claim 2, characterized in that: The tension sensor is also connected to a digital display module to display tension signal data.

4. The oil weighing, filling and sampling device for engine bench testing according to claim 2, characterized in that: The control modes of the control and recording module for each solenoid valve and the quantitative oil pump include: (1) Weighing new oil: Connect the oil pipe port A to the new oil barrel, open the metering oil pump A and solenoid valves A and B, and close the other metering oil pumps and solenoid valves; (2) New oil sampling: Connect the sampling bottle to the oil pipe port C, open the quantitative oil pump B and the solenoid valve E, and close the other quantitative oil pumps and solenoid valves; (3) Add new oil: open the metering oil pump B and the solenoid valve G, and close the other metering oil pumps and solenoid valves; (4) Used oil sampling is divided into: ① Release the dead zone oil before sampling: open the quantitative oil pump A and solenoid valves B and C, and close the other quantitative oil pumps and solenoid valves; ② Sampling: Connect the sampling bottle to the oil pipe port B, open the quantitative oil pump A and solenoid valves C and D, and close the other quantitative oil pumps and solenoid valves; ③ After sampling, add the dead zone oil back: open the quantitative oil pump B and the solenoid valve G, and close the other quantitative oil pumps and solenoid valves; (5) Weighing the used oil: Open the metering oil pump A and solenoid valves B and C, and close the other metering oil pumps and solenoid valves; (6) Draining the oil from the liquid storage tank: Connect the oil pipe port C to the waste liquid barrel, open the metering oil pump B and the solenoid valve E, and close the other metering oil pumps and solenoid valves; (7) Direct filling: Connect the oil pipe port D to a new oil barrel, open the metering oil pump B and solenoid valves F and G, and close the other metering oil pumps and solenoid valves; (8) Direct oil drain: Connect the oil pipe port B to the oil barrel, open the metering oil pump A and solenoid valves C and D, and close the other metering oil pumps and solenoid valves.

5. The oil weighing, filling and sampling device for engine bench testing according to claim 4, characterized in that: The control mode of each solenoid valve and the quantitative oil pump by the control and recording module also includes: (9) cleaning of the liquid storage tank, which is specifically divided into: ① Pump the cleaning agent in: connect the oil pipe port A to the cleaning agent barrel, open the quantitative oil pump A and solenoid valves A and B, and close the other quantitative oil pumps and solenoid valves; ② Pump out the cleaning agent: connect the oil pipe port C to the oil barrel, open the metering oil pump B and the solenoid valve E, and close the other metering oil pumps and solenoid valves.

6. The oil weighing, filling and sampling device for engine bench testing according to claim 5, characterized in that: The control and recording module sets the required control mode for each metering oil pump, solenoid valve and relay, and then sets the opening time of the metering oil pump and the solenoid valve according to the needs of the test.

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