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

Abstract

The invention discloses an engine oil weighing, filling and sampling device for an engine bench test, and the device comprises an oil storage tank which is hung through a tension sensor; the first pipeline is connected with the oil storage tank upper part and the engine oil pan; an electromagnetic valve B, a quantitative oil pump A and an electromagnetic valve C are sequentially connected to the first pipeline in series; pipelines at two ends of the quantitative oil pump A are respectively provided with a branched pipeline port A and a branched pipeline port B, and the branches where the pipeline port A and the pipeline port B are located are respectively connected in series with an electromagnetic valve A and an electromagnetic valve D; the second pipeline connects the bottom of the oil storage tank with an engine oil pan; a quantitative oil pump B and an electromagnetic valve G are sequentially connected to the second pipeline in series; the pipelines at the two ends of the quantitative oil pump B are provided with a branched pipeline opening C and a branched pipeline opening D. The branches where the pipeline opening C and the pipeline opening D are located are connected with an electromagnetic valve E and an electromagnetic valve F respectively in series. According to the invention, automatic control and recording of multiple working modes are realized, and the test is rapid, convenient and safe.

Description

Technical Field

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

[0002] The engine oil needs to be monitored during the engine bench test. Currently, some engine bench tests that specifically assess the performance of lubricating oil also require regular sampling and testing of the engine oil. Sampling and testing of the engine oil can effectively reflect the operating status of the engine and the oil, and play an important role in the performance evaluation of the engine and the oil.

[0003] However, there are currently some problems with oil sampling during bench testing.

[0004] 1. Problems existing in oil filling during bench testing.

[0005] In the engine bench test, the most common way to add oil is to pour the oil directly from the oil filling port of the engine cylinder head cover. This method has many disadvantages. For example, during the pouring process, first, the amount of oil added to heavy-duty engines is often large (mostly more than 20 kg or even 30 kg). A standard oil barrel weighs about 17 kg, and the oil filling port of a heavy-duty engine is often more than 1.5 meters high, which makes manual oiling time-consuming and laborious; second, it is difficult to control the pouring speed manually. If the filling is too slow, it will be time-consuming and laborious. If the filling is too fast, it will easily overflow. Once the oil overflows during pouring, the actual amount of oil added will be inaccurate and fail to meet the ideal filling requirements.

[0006] 2. Problems with oil sampling during bench testing.

[0007] In the engine bench test, oil sampling for physical and chemical analysis is often the key data for evaluating the operation of the engine and the wear status of parts. In particular, the bench test with oil as the research object requires frequent oil sampling without stopping the engine during operation. When the engine is running, there are many high-temperature and high-pressure areas around it. At the same time, the flywheel, pulley and transmission shaft rotate at high speed. If the sampling operator is not careful, he will face extremely serious mechanical damage, which is quite dangerous. At the same time, the operation of the engine is accompanied by a lot of noise, which is very harmful to human hearing. At present, the sampling of engine oil is usually carried out by installing a manual ball valve at the bottom of the oil pan. When the sampling operator performs the sampling operation, he has to get close to the high-speed running engine, and he will face all the safety issues mentioned above. In addition, the amount of sampling is often strictly regulated. It is difficult to control the draining time and the amount of oil taken by manual draining of engine oil, which will cause greater or less impact on the continuation of the test.

[0008] 3. Problems with engine oil draining during bench testing.

[0009] In some tests that require a high weight of the engine oil, such as the oil consumption test (the oil consumption test is an important test to evaluate the degree of engine oil burning), it is necessary to weigh the oil before and after the test more accurately. At present, the oil consumption test mainly relies on gravity to drain the oil from the oil pan, and this method of draining the oil has great disadvantages. Generally, the temperature during the oil consumption test needs to be strictly controlled, because the temperature of the oil affects its viscosity, and the viscosity affects the fluidity of the oil, and the fluidity directly affects whether the oil is drained thoroughly. The gravity draining process often takes 30 minutes or even longer, which will cause the oil temperature to gradually cool down, lose fluidity, and not be drained cleanly, especially when the temperature is low. This problem is more serious. Therefore, there is an urgent need for a device for rapid oil draining to ensure the consistency of the test draining situation.

[0010] In summary, there are great problems in the current engine bench test of oil filling, weighing and sampling. Existing solutions are often limited to optimizing one aspect, and there is no system device that integrates filling, weighing, draining and sampling. Summary of the invention

[0011] The purpose of the present invention is to provide an oil weighing, filling and sampling device for engine bench test, which solves the problems of oil-related operations during engine bench test, including: (1) Oil filling is inconvenient, time-consuming and labor-intensive; (2) Inaccurate oil filling amount; (3) The problem of inaccurate amount of oil sampling; (4) Operator safety issues when taking oil samples; (5) The engine drains oil slowly, which affects the accuracy of draining oil.

[0012] The technical solution of the present invention is: An oil weighing, filling and sampling device for engine bench testing, comprising: 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 branch 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.

[0013] Preferably, a one-way valve A is connected in series between the oil storage tank and the solenoid valve B on the first pipeline; and a one-way valve B is connected in series between the engine oil pan and the solenoid valve G on the second pipeline.

[0014] Preferably, the top of the oil storage tank is connected to the cylinder head cover of the engine through a pressure balance pipe.

[0015] Preferably, 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 the quantitative oil pump through a relay, and the control and recording module is also connected to the tension sensor to receive tension signal data.

[0016] Preferably, the tension sensor is also connected to a digital display module to display tension signal data.

[0017] Preferably, the control mode of the control and recording module for each solenoid valve and the quantitative oil pump includes: (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.

[0018] Preferably, the control mode of the control and recording module for each solenoid valve and the quantitative oil pump 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.

[0019] Preferably, 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.

[0020] The advantages of the present invention are: (1) The oil weighing, filling and sampling device for engine bench test of the present invention is mainly composed of an oil storage tank, a pipeline, a quantitative oil pump, a solenoid valve and a tension sensor, and communicates with the bench control and recording equipment to realize automatic control and recording of multiple working modes, making the test quick, convenient and safe.

[0021] (2) The present invention installs a one-way valve to prevent the oil in the pipeline from flowing back, so that the oil in the pipeline is kept full, ensuring that the metering oil pump can pump oil immediately after it is started, and avoiding the metering oil pump from idling during the start-up process, resulting in inaccurate pumping.

[0022] (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

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 This is a structural principle diagram of the oil weighing, filling and sampling device of the present invention; Figure 2 The figure is a schematic diagram of the communication between the components of the present invention and the desktop computer. DETAILED DESCRIPTION

[0024] like Figure 1 As shown, the oil weighing, filling and sampling device for engine bench test proposed by the present invention is mainly composed of an oil storage tank, two pipelines, two quantitative oil pumps, two one-way valves, seven solenoid valves and a tension sensor, and the specific connection method is as follows.

[0025] The oil storage tank is suspended by a tension sensor; the tension sensor is also connected to a digital display module to display tension signal data.

[0026] 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 branch 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 solenoid valves A and solenoid valves D.

[0027] 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 branch 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.

[0028] 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. Since the amount of oil pumped is determined by the start time of the metering oil pump, the one-way valve is installed to prevent the oil in the pipeline from flowing back, so that the oil in the pipeline is full, ensuring that the metering oil pump can pump oil immediately after starting, and avoiding the metering oil pump from idling during the start process, resulting in inaccurate pumping.

[0029] The top of the oil tank is connected to the cylinder head cover of the engine through a pressure balance pipe. Since the engine crankcase and the oil tank are both relatively sealed spaces, pumping oil may cause excessive pressure at one end or too little pressure at the other end, which will increase the load of the pumping oil on the one hand and affect the engine crankcase pressure on the other hand, thereby affecting the accuracy of the pumping oil amount and the accuracy of the test-related data collection. Therefore, a pressure balance pipe is used to balance the pressure between the engine crankcase and the oil tank to reduce the impact of the above problems.

[0030] Figure 1 The specifications (parameters) of each component can be determined according to the specific test requirements, such as 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., which can be determined according to the engine oil storage volume and the accuracy requirements of the test.

[0031] There are many components in the device of the present invention and the installation is relatively complicated, so it is necessary to design a support frame to assist in construction and assembly. At the same time, it is necessary to avoid the impact of engine vibration on the components as much as possible. Therefore, an appropriate shock-absorbing solution is needed, such as adding shock-absorbing pads at the bottom of the support frame.

[0032] The device of the present invention 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.

[0033] The control and recording module of this embodiment is composed of a bench computer. The required control mode needs to be set in advance according to the relay combination of the components presented in the table, and then the corresponding parameters are set according to the needs of the test, such as the opening time of the quantitative oil pump and the solenoid valve, and the corresponding time value is set according to the actual required oil pumping amount. The communication between the components of the invention and the bench computer is as follows Figure 2 shown.

[0034] The bench computer has 9 working modes for controlling each solenoid valve and quantitative oil pump, which are realized by opening or closing each component. The specific working modes and control principles are detailed in the following table:

[0035] Each mode is described as follows: (1) Weighing new oil: a. "New oil" generally refers to the oil that needs to be added before the test; b. The amount of new oil added 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 filling amount and the alarm value is set.

[0036] (2) New oil sampling: The sampling amount is determined by the opening time of the metering oil pump B.

[0037] (3) Adding new oil: The amount of new oil added is determined by the opening time of the metering oil pump B.

[0038] (4) Used oil sampling is divided into: ① Release the dead zone oil before sampling: a. In order to eliminate the interference of the dead zone oil remaining in the pipeline from the oil pan to the sampling port, first pump the dead zone oil into the oil storage tank for storage; b. The amount of dead zone oil released is determined by the opening time of metering oil pump A.

[0039] ② Sampling: a. "Old oil" refers to oil that has been used in operation; b. The amount of sampling is determined by the opening time of the quantitative oil pump A; ③ Add dead zone oil back after sampling: Whether the dead zone oil needs to be added back to the engine depends on the situation. If all the dead zone oil is added back, it is necessary to ensure that the metering oil pump B is open for a sufficient time.

[0040] (5) Weighing the used oil: Usually, all the oil in the engine oil pan is pumped back into the oil storage tank, and it is necessary to ensure that the metering oil pump A is open for a sufficient time.

[0041] (6) Draining the oil from the tank: Usually, all the oil in the tank is drained to facilitate the next filling. Ensure that the metering oil pump B is open for a sufficient time. If the old oil is to be retained, other containers can be placed at the oil pipe port C.

[0042] (7) Direct Add: a. Add the known weight of oil directly to the engine without passing through the oil storage tank, and ensure that the metering oil pump B is open long enough to pump out the oil in the new oil barrel; b. “New oil” generally refers to the oil that needs to be added before testing.

[0043] (8) Direct oil draining: Drain the oil from the engine oil pan directly without weighing it. Make sure that the metering oil pump A is open long enough to drain all the oil from the oil pan.

[0044] (9) Liquid storage tank cleaning is divided into: ① Pump the cleaning agent in: The amount of cleaning agent pumped in is determined by the opening time of the quantitative oil pump A. The volume of the liquid storage tank is the upper limit of the pumping amount and the alarm value is set; ② Pump out the cleaning agent: Usually, all the cleaning agent in the storage tank is pumped out, and ensure that the quantitative oil pump B is open for a sufficient time. Repeat ①② until the cleaning agent is clean.

[0045] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any modifications made according to the spirit of the main technical solution of the present invention should be included in 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 branch 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.

2. The oil weighing, filling and sampling device for engine bench testing according to claim 1, characterized in that: 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.

3. The oil weighing, filling and sampling device for engine bench testing according to claim 1, characterized in that: The top of the oil storage tank is connected to the cylinder head cover of the engine through a pressure balance pipe.

4. 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.

5. The oil weighing, filling and sampling device for engine bench testing according to claim 4, characterized in that: The tension sensor is also connected to a digital display module to display tension signal data.

6. The oil weighing, filling and sampling device for engine bench testing according to claim 4, 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.

7. The oil weighing, filling and sampling device for engine bench testing according to claim 6, 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.

8. The oil weighing, filling and sampling device for engine bench testing according to claim 7, 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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