Oil consumption test device and measurement method

Abstract

The application provides a lubricating oil consumption testing device for testing the lubricating oil consumption of a diesel engine. In the oiling unit of the lubricating oil consumption testing device, an oil tank is provided with lubricating oil, a feeding pipeline is connected to the oil tank and an oil pan, and a feeding component is arranged in the feeding pipeline and used for feeding the lubricating oil from the oil tank to the oil pan. In the temperature control unit, a temperature acquisition assembly acquires a first lubricating oil temperature in the oil tank and a second lubricating oil temperature in the oil pan, and a heater heats the lubricating oil in the oil tank according to the first lubricating oil temperature and the second lubricating oil temperature. An overflow pipeline is connected to the oil pan and used for discharging the lubricating oil overflowing from the oil pan. A metering unit is used for obtaining the oil quantity difference between the quantity of the lubricating oil fed from the oil tank and the quantity of the lubricating oil discharged from the overflow pipeline. The application further provides a lubricating oil consumption measuring method using the lubricating oil consumption testing device. The lubricating oil consumption measuring method and the lubricating oil consumption testing device can accurately complete the measurement of the lubricating oil consumption in the diesel engine.

Description

TECHNICAL FIELD

[0001] The present application relates to a lubricating oil consumption testing device and a lubricating oil consumption measuring method, which can test the lubricating oil consumption of a diesel engine. BACKGROUND

[0002] During the operation of a diesel engine, a lubricating oil system supplies lubricating oil required by each moving part, and performs lubrication and cooling, which is an important guarantee for the reliable operation of the diesel engine. The lubricating oil consumption rate can reflect the economy and emission of the diesel engine, and it is not only an important economic indicator, but also a symbol of whether the structure, manufacturing and operation state of the diesel engine are good, and is one of the important performance parameters of the diesel engine. The main way of lubricating oil consumption of the diesel engine is that lubricating oil enters the cylinder, and the order of magnitude of the lubricating oil consumption is relatively small, and is usually only 0.1% to 0.5% of the fuel consumption. How to accurately and quickly complete the measurement of the lubricating oil consumption in a short time is a difficulty faced in actual work.

[0003] A measuring method of an engine lubricating oil consumption value is disclosed in Chinese patent application CN105424166A, which proposes that the lubricating oil consumption under a certain working condition is measured by measuring the lubricating oil solubility in the intake air. An automatic replenishment type engine lubricating oil consumption detection system is disclosed in Chinese utility model patent CN205078319U, which proposes that the lubricating oil consumption can be calculated by the change of the oil level of a visible cylinder connected with the oil sump.

[0004] However, the inventors believe that the above measuring methods and systems cannot accurately measure the lubricating oil consumption of a marine diesel engine due to the characteristics of the marine diesel engine. In particular, for the oil sump of the marine diesel engine, the temperature difference can cause the volume change of the lubricating oil therein, and this point is not considered in the above measuring methods, so the testing accuracy is low.

[0005] Therefore, it is necessary to provide a lubricating oil consumption testing device and measuring method, which can accurately complete the measurement of the lubricating oil consumption, and is particularly suitable for marine diesel engines. SUMMARY

[0006] The purpose of the present application is to provide a lubricating oil consumption testing device and measuring method, which can accurately complete the measurement of the lubricating oil consumption of a diesel engine, especially a marine diesel engine.

[0007] The present application provides a kind of oil consumption testing device, for testing the oil consumption of diesel engine, the diesel engine has the oil sump of collection oil, the oil consumption testing device includes oiling unit, temperature control unit, overflow pipeline and metering unit.The oiling unit includes oiling tank, feed pipeline and feed component, the oiling tank stores oil, the feed pipeline is connected to the oiling tank and the oil sump, the feed component is arranged in the feed pipeline, for feeding oil from the oiling tank to the oil sump.The temperature control unit includes temperature acquisition assembly and heater, the temperature acquisition assembly acquires the first oil temperature in the oiling tank and the second oil temperature in the oil sump, and the heater heats the oil in the oiling tank according to the first oil temperature and the second oil temperature.The overflow pipeline is connected to the oil sump for discharging the oil overflowed from the oil sump.The metering unit is used to obtain the oil quantity difference between the amount of oil fed from the oiling tank and the amount of oil discharged from the overflow pipeline.

[0008] In one embodiment, the oil consumption testing device further includes a control unit configured to: acquire the first oil temperature and the second oil temperature acquired by the temperature acquisition assembly, calculate the temperature difference between the first oil temperature and the second oil temperature, and control the start and stop of the heater according to the temperature difference; and / or, after the heater stops heating, start the feed component, thereby feeding oil to the oil sump.

[0009] In one embodiment, the oil consumption testing device further includes a liquid level acquisition assembly for acquiring the oil level in the oil sump; and / or, the oil consumption testing device further includes a control unit configured to control the start and stop and / or flow switching of the feed component according to the oil level acquired by the liquid level acquisition assembly.

[0010] In one embodiment, the highest liquid level of the overflow pipeline determines the reference liquid level of the oil sump; and the liquid level acquisition assembly is a liquid level alarm, and the highest liquid level of the overflow pipeline is higher than the height of the liquid level alarm.

[0011] In one embodiment, the outlet of the feed pipeline and the inlet of the overflow pipeline are respectively connected to the first side and the second side of the oil inlet and the oil outlet of the oil sump.

[0012] In one embodiment, the overflow pipeline is a transparent pipeline made of transparent material.

[0013] The present application also provides an oil consumption measurement method for measuring the oil consumption value of a diesel engine, the diesel engine has an oil sump for collecting oil, and the aforementioned oil consumption testing device is used, wherein:

[0014] Step S1, reaching a reference oil level in an oil sump of the diesel engine;

[0015] Step S2, starting the diesel engine to a predetermined operating condition and running for a predetermined time period, and then stopping the diesel engine, under the condition that a feed line and an overflow line of the oil consumption testing device are both closed, and allowing the in-engine oil to fall back to the oil sump;

[0016] Step S3, heating the oil in an oil tank of an oil feeding unit by a heater of a temperature control unit of the oil consumption testing device, until a temperature difference between a first oil temperature and a second oil temperature collected by a temperature collection assembly of the temperature control unit is within a predetermined temperature difference range;

[0017] Step S4, starting a feeding component of the oil feeding unit of the oil consumption testing device, opening the feed line, and then feeding oil to the oil sump;

[0018] Step S5, opening the overflow line, and stopping the feeding component when oil is discharged from the overflow line;

[0019] Step S6, closing the overflow line when a flow rate of the oil discharged from the overflow line reaches a predetermined flow rate range;

[0020] Step S7, obtaining an oil amount difference between an oil amount fed from the oil tank and an oil amount discharged from the overflow line by a metering unit of the oil consumption testing device;

[0021] Step S8, calculating an oil consumption value of the diesel engine according to the operating parameters of the diesel engine in Step S2 and the oil amount difference obtained in Step S7.

[0022] In one embodiment, in Step S4, the feeding flow rate of the feeding component is reduced when the oil level in the oil sump collected by the oil level collection assembly of the oil consumption testing device is higher than a predetermined level.

[0023] In one embodiment, in step S1, the oil level is brought to the reference level by the following steps: step S11, with the feed line and overflow line of the oil consumption testing device closed, starting the diesel engine to a predetermined condition and then stopping, and allowing the internal oil to fall back to the oil sump; step S12, heating the oil in the oil tank of the oiling unit by the heater of the temperature control unit of the oil consumption testing device until the temperature difference between the first oil temperature and the second oil temperature collected by the temperature collection assembly of the temperature control unit is within a predetermined temperature difference range; step S13, starting the feed component of the oiling unit of the oil consumption testing device, opening the feed line, and then feeding oil to the oil sump; step S14, opening the overflow line, and stopping the feed component when oil is discharged from the overflow line; and step S15, closing the overflow line when the oil flow from the overflow line reaches a predetermined flow range.

[0024] In one embodiment, in step S8, the oil consumption value is calculated according to the following formula:

[0025]

[0026] wherein g m is the oil consumption value, Δm is the oil difference between the amount of oil fed from the oil tank and the amount of oil discharged from the overflow line, P is the effective power of the predetermined operating condition, and t is the predetermined time length.

[0027] In the oil consumption testing device and the measurement method, the oil consumption value can be calculated by obtaining the oil difference between the amount of oil fed from the oil tank and the amount of oil discharged from the overflow line, which is simple and fast. The temperature control unit is provided to make the temperature of the oil fed to the oil sump consistent with the temperature of the oil originally in the oil sump, thereby avoiding the problem of low test accuracy caused by temperature difference, and thus the measurement of oil consumption in the diesel engine can be accurately completed.

[0028] Moreover, the feed line and the overflow line of the oil consumption testing device can be respectively connected to the oil inlet and the oil outlet of the oil sump, without the need to modify the oil sump of the existing diesel engine, especially the marine diesel engine, and thus the product range is wide, and the device is particularly suitable for marine diesel engines. BRIEF DESCRIPTION OF DRAWINGS

[0029] The above and other features, properties, and advantages of the present application will become more apparent by describing in detail the following embodiments with reference to the attached drawings, in which:

[0030] Figure 1 is a schematic view of an exemplary oil consumption testing device according to the present application. DETAILED DESCRIPTION

[0031] The present application is further described in the following description with reference to the figures, in which embodiments of the application are explained. After considering this discussion, those skilled in the art will be able to employ the application without undue experimentation. All patents and publications mentioned herein are incorporated by reference in their entirety.

[0032] For example, the first feature is formed above or on the second feature in the description, which can include the embodiment that the first feature and the second feature are formed by direct contact, and can also include the embodiment that additional features are formed between the first feature and the second feature, so that the first feature and the second feature can not be directly connected. Further, when the first element is described in a manner connected or combined with the second element, the description includes the embodiment that the first element and the second element are directly connected or combined with each other, and also includes the embodiment that one or more other intervening elements are added to indirectly connect the first element and the second element or combine them with each other.

[0033] GB / T1463-2009 "Diesel Engine Oil Consumption Test Method" puts forward the weight method, volume method, etc., which makes the difference between the input and the collection of lubricating oil, so as to calculate the lubricating oil consumption value, which has certain feasibility. However, these methods have poor precision and poor operability in the actual engineering application of marine diesel engine test.

[0034] Specifically, the standard points out that the lubricating oil consumption can be tested by volume method and weight method. The volume method needs to be modified on the diesel engine oil sump, and the volume of lubricating oil in the oil sump is determined by connecting an external glass liquid level meter. The weight method, such as direct weighing method, oil adding and weighing method, and liquid surface dynamic balance, can determine the lubricating oil consumption before and after the test by weighing. Both of the two methods can measure the lubricating oil consumption.

[0035] The marine diesel engine usually adopts a large-capacity wet oil sump, and the volume of the oil sump reaches thousands or even several thousands of liters. The bottom area of the oil sump is generally 1-5 m2. A 1 millimeter error of the liquid surface will cause a 1-5 L difference in the volume of the lubricating oil, which corresponds to about 0.85-4.25 kg of lubricating oil, which affects the accuracy of the lubricating oil consumption rate. Therefore, the volume method has poor precision for testing the lubricating oil consumption of the marine diesel engine. The direct weighing method, the oil adding and weighing method, and the volume method mentioned in the standard are only applicable to small-capacity oil sumps or dry oil sumps. The principle of the liquid surface dynamic balance weighing method is relatively applicable, but the liquid surface of the oil sump fluctuates violently when the marine diesel engine is running. The weighing needs to be performed after the engine is stopped. There is a lot of lubricating oil remaining in the friction pair and the oil passage after the engine is running and then stopped, which greatly affects the precision of the lubricating oil consumption. Improper handling will lead to poor test precision. Moreover, the leveling process cannot confirm the liquid level in the oil sump. If the test data is read under the condition of liquid level fluctuation caused by oil adding operation and oil backflow in the engine, the data will be distorted. Therefore, there is a problem of poor precision in the actual engineering application of the marine diesel engine.

[0036] Moreover, the standard only indicates the basic test principle, simple device schematic, and test process. However, it is difficult to implement and the efficiency is difficult to guarantee for the marine diesel engine. According to the standard, the overflow pipe is used to accurately level the lubricating oil surface during the test. However, there is no intuitive reference or leveling reference during the leveling process. Therefore, the leveling process is often time-consuming and labor-intensive, and the efficiency is low. Therefore, there are problems of implementation difficulty and poor operability in the actual engineering application of the marine diesel engine.

[0037] The engine lubricating oil consumption value measurement method mentioned in the background art can only measure the lubricating oil consumption affected by blow-by during the operation of the engine, and does not consider the influence of lubricating oil leakage, oil difference, and other factors on the lubricating oil consumption. The error is large in engineering application. Moreover, the device is composed of multiple fine processing and analysis modules such as an air intake module, an oil mist generation module, an oil mist collection module, and an oil mist analysis and measurement module. The price is high, and the economy is poor.

[0038] In the automatic replenishment type engine lubricating oil consumption detection system mentioned in the background art, the method is similar to the volume method in the national standard, but the precision is poor. Moreover, the system needs to be operated for several tens or even hundreds of hours under the specified operating conditions to obtain the data, which causes energy consumption. There are problems of poor economy and low precision.

[0039] In summary, the foregoing test principle is clear, but the test precision and efficiency are poor. As for the oil consumption evaluation method using the solubility of lubricating oil in the cylinder intake air, the test device is complex, the precision is low, and the economy is poor. As for the visible measuring cylinder liquid surface judgment method, the measurement precision is low, the time and energy cost are high, and the economy is poor for the marine diesel engine.

[0040] Therefore, at present, there is no accurate and efficient oil consumption testing device or method suitable for marine diesel engines in engineering applications, and thus the present application is proposed. Figure 1 A schematic diagram of an exemplary oil consumption testing device 100 according to the present application is shown. It should be understood that all the drawings are only exemplary and are not drawn according to the same scale, and should not be considered as limiting the actual protection scope required by the present application.

[0041] The oil consumption testing device 100 can be used to test the oil consumption of the diesel engine 200. The diesel engine 200 has an oil sump 201 for collecting oil.

[0042] The oil consumption testing device 100 can include a refueling unit 10 and a temperature control unit 20.

[0043] The refueling unit 10 can include a refueling tank 11, a feeding pipeline 12 and a feeding component 13.

[0044] The refueling tank 11 stores oil, and thus can also be referred to as an oil tank. The volume of the refueling tank 11 can be determined according to the estimated oil consumption, for example, can be set to 2% to 5% of the volume of the oil sump 201. It can be understood that the numerical range herein includes the end value.

[0045] The feeding pipeline 12 connects the refueling tank 11 and the oil sump 201. In the figure, the feeding pipeline 12 can include a pipeline section connecting the oil sump 201 and the feeding component 13, a pipeline section connecting the refueling tank 11 and the feeding component 13, and can also be considered to include a pipeline section inside the feeding component 13 for oil flow. Considering that the oil flow rate should not be too high, the diameter of the pipeline of the feeding pipeline 12 can be about 30mm, for example.

[0046] The feeding component 13 is arranged in the feeding pipeline 12 and is used to feed oil from the refueling tank 11 to the oil sump 201. The feeding component 13 can be a refueling pump, for example, an electric variable frequency oil pump, which can pump oil. The flow rate of the feeding component 13 can be determined according to the estimated oil consumption, for example, can be set to 0.1 to 1 m 3 / h. As will be described in detail later, the start and stop of the feeding component 13, the flow switching can be realized through the alarm signal of the liquid level acquisition assembly 60.

[0047] The temperature control unit 20 can include a temperature acquisition assembly 21 and a heater 22.

[0048] The temperature acquisition component 21 can acquire a first oil temperature T1 in the oil tank 11 and a second oil temperature T2 in the oil sump 201. For example, the temperature acquisition component 21 can include two temperature sensors 21a, 21b. The temperature sensor 21a can monitor the oil temperature in the oil tank 11 (i.e., the first oil temperature T1), and can feed a monitoring signal to the control unit 50 described below, for example. The temperature sensor 21b can monitor the oil temperature in the oil sump 201 (i.e., the second oil temperature T2), and can also feed a monitoring signal to the control unit 50 described below, for example.

[0049] It can be understood that the terms "first", "second", etc. used herein to define features are merely used for the convenience of distinguishing the corresponding features, and have no special meaning unless otherwise stated. Therefore, the above terms cannot be construed as limiting the scope of protection of the present application.

[0050] The heater 22 can heat the oil in the oil tank 11 according to the first oil temperature T1 and the second oil temperature T2. In the illustrated embodiment, the heater 22 can heat the oil in the oil tank 11 and stop heating after the first oil temperature T1 in the oil tank 11 is the same as the second oil temperature T2 in the oil sump 201. By providing the temperature sensors 21a, 21b, the oil temperature in the oil tank 11 can be made the same as or close to the oil temperature in the oil sump 201. In another embodiment, a simplified temperature control can also be achieved by artificial control means such as a point temperature gun measurement.

[0051] The oil consumption test device 100 can further include an overflow line 30 and a metering unit 40.

[0052] The overflow line 30 can be connected to the oil sump 201 for discharging the oil overflowing from the oil sump 201. For example, the overflow line 30 can be connected to a bottom interface of the oil sump 201, such as the oil drain port 203 described below, so as to discharge the oil overflowing from the oil sump 201.

[0053] The metering unit 40 can be configured to obtain the oil quantity difference Δm between the oil quantity m1 fed from the oil tank 11 and the oil quantity m2 discharged from the overflow pipeline 30. For example, the metering unit 40 can include a weighing unit, such as a waterproof electronic scale, for example, the measurement accuracy can be not less than 0.1 kg. In the illustrated embodiment, the oil consumption testing device 100 can further include a recovery tank 70 configured to collect the oil (or oil liquid) discharged from the overflow pipeline 30, for example, the volume can be about 10 L. The waterproof electronic scale as the metering unit 40 can weigh the oil weight in the oil tank 11 and the recovery tank 70, for example, weigh the mass of the oil tank 11 and the recovery tank 70 before and after the test, so that the oil quantity m1 fed from the oil tank 11 and the oil quantity m2 (i.e., the oil quantity collected by the recovery tank 70) discharged from the overflow pipeline 30 can be obtained, and thus the oil quantity difference Δm between the oil quantities m1 and m2 can be further obtained. In the illustrated embodiment, the metering unit 40 can weigh the oil tank 11 and the recovery tank 70 respectively before the test, and then weigh the oil tank 11 and the recovery tank 70 respectively again after the test, so that the oil quantity m1 fed from the oil tank 11 can be obtained by subtracting the weight of the oil tank 11 before and after the test, and the oil quantity m2 discharged from the overflow pipeline 30 can be obtained by subtracting the weight of the recovery tank 70 before and after the test. In another embodiment, the metering unit 40 can weigh the total weight of the oil tank 11 and the recovery tank 70 before the test, and then weigh the total weight of the oil tank 11 and the recovery tank 70 again after the test, so that the oil quantity difference Δm can be obtained by subtracting the total weight before and after the test. The metering unit 40, the recovery tank 70, etc. can constitute a mass measurement system A3.

[0054] In the oil consumption testing device 100 described above, the oil is fed from the oil tank 11 to the oil sump 201 by the feeding member 13, the overflow oil is discharged from the oil sump 201 by the overflow pipeline 30, and then the oil quantity difference Δm between the oil quantity m1 fed from the oil tank 11 and the oil quantity m2 discharged from the overflow pipeline 30 is obtained by the metering unit 40, so that the oil consumption value can be calculated. By setting the temperature control unit 20, the oil temperature in the oil tank 11 and the oil sump 201 can be the same, the influence of the oil density difference caused by the temperature difference on the test accuracy can be reduced, and the test accuracy can be significantly improved.

[0055] In the illustrated embodiment, the oil consumption testing device 100 can further include a control unit 50.

[0056] It is to be understood that certain terms used herein are used in their broadest, generic sense unless otherwise indicated. As used herein, the following terms shall have the following meanings.

[0057] In the illustrated embodiment, the control unit 50 can be configured to acquire the first oil temperature and the second oil temperature collected by the temperature collection assembly, calculate the temperature difference ΔT between the first oil temperature T1 and the second oil temperature T2, and control the start and stop of the heater 22 according to the temperature difference ΔT.

[0058] In the illustrated embodiment, the control unit 50 can be further configured to start the feeding component 13 after the heater 22 stops heating, thereby feeding the oil to the oil sump 201.

[0059] In the illustrated embodiment, the oil consumption testing device 100 can further include a liquid level collection assembly 60 for collecting the oil level in the oil sump 201. In this case, for example, the control unit 50 can be configured to control the start and stop and / or flow switching of the feeding component 13 according to the oil level collected by the liquid level collection assembly 60.

[0060] In the illustrated embodiment, the highest liquid level of the overflow line 30 can determine the reference liquid level H0 of the oil sump 201. In the illustrated embodiment, the overflow line 30 is a Z-shaped pipe, for example, made of heat-resistant material, i.e., a Z-shaped heat-resistant pipe, wherein the height of the upper horizontal section 301 of the Z-shaped pipe is substantially the highest liquid level of the overflow line 30. The diameter of the pipe constituting the overflow line 30 can be about 30 mm, for example. The reference liquid level H0 of the oil sump 201 means that once it is higher than the reference liquid level H0, the oil starts to overflow from the oil sump 201. The highest liquid level of the overflow line 30, i.e., the reference liquid level H0 of the oil sump 201, should be lower than the highest liquid level of the oil sump 201 of the diesel engine 200.

[0061] In the illustrated embodiment, the level acquisition component 60 can be, for example, a level alarm. The highest level of the overflow pipe 30 can be higher than the height of the level alarm, which serves as the level acquisition component 60. When the level alarm serves as the level acquisition component 60, it can monitor the lubricating oil level in the oil pan 201. The height of the level alarm is approximately equal to the lubricating oil level at which it issues an alarm signal. The highest level of the overflow pipe 30 (i.e., the reference level H0 of the oil pan 201) can be slightly higher than the level alarm, which serves as the level acquisition component 60. Thus, when the lubricating oil level in the oil pan 201 is slightly lower than the reference level H0, the level alarm, which serves as the level acquisition component 60, can issue an alarm signal. For example, the control unit 50 can automatically switch the feed component 13 to the lowest speed and flow rate, allowing the test to enter the level observation and leveling mode, which will be described in detail later. In this way, a high level warning can be achieved. The liquid level alarm, which is the liquid level acquisition component 60, can be a capacitive liquid level sensor, a pressure liquid level sensor, or other sensor products, which have higher accuracy than float-type liquid level sensors.

[0062] In the illustrated embodiment, the outlet of the feed pipe 12 ( Figure 1 In the middle, the right port of the feed pipe 12) and the inlet of the overflow pipe 30 ( Figure 1 In one embodiment, the left port of the overflow pipe 30 is connected to the filler port 202 and the sucker port 203 of the oil pan 201, respectively. In another embodiment, the outlet of the feed pipe 12 and the inlet of the overflow pipe 30 can also be connected to the sucker port 203 and the filler port 202 of the oil pan 201, respectively. That is, the outlet of the feed pipe 12 and the inlet of the overflow pipe 30 can be connected to the first and second of the filler port 202 and the sucker port 203 of the oil pan 201, respectively.

[0063] It is understandable that the use of spatial relation terms such as "left" and "right" in the text to describe the relationship between one element or feature shown in the accompanying drawings and other elements or features is for reference. Figure 1 The directions are used for ease of description, and these spatial relation terms are intended to include directions other than those depicted in the figures for elements or components in use or operation. For example, if an element in the figures is flipped, the direction of an element described as "to the left" of another element or feature will change to "to the right" of that other element or feature; therefore, the spatial relation descriptors used herein should be interpreted accordingly.

[0064] In a preferred embodiment, the overflow line 30 can be a transparent pipe made of transparent material, such as a glass pipe, a PC pipe, etc. In combination with the above, the overflow line 30 can be a Z-shaped transparent heat-resistant pipe. In this way, the overflow line 30 can display the oil level in the oil sump 201 and can drain excess oil. By observing the fluctuation of the oil level in the overflow line 30, it can be determined whether the oil level in the oil sump 201 is stable.

[0065] In the illustrated embodiment, the overflow line 30 can further be provided with a shut-off valve 31. The shut-off valve 31 can be opened during the oil level finding process to be described later and closed during the operation of the diesel engine 200 to prevent oil leakage. The overflow line 30 and the shut-off valve 31 therein can constitute an oil level finding system A2. The oil level finding system A2 (in particular, the overflow line 30) can be installed at a position close to the bottom of the end surface of the oil sump 201 and can drain oil higher than the reference oil level H0. As will be described in detail later, by determining the difference from the reference oil level H0 and the oil level state in the oil sump 201 by visual observation or an image processing device (e.g., including a camera), the oil level finding process can be effectively shortened.

[0066] The oil filling unit 10, the temperature control unit 20, the control unit 50, the oil level acquisition assembly 60, etc. can constitute an automatic oil filling system A1. The automatic oil filling system A1 can heat the oil to a set temperature, which is equivalent to the temperature of the oil in the oil sump 201, and fill the oil into the oil sump 201. The interface of the oil inlet line 12 and the oil sump 201 should be arranged at a position close to the bottom of the oil sump 201 and away from the oil level finding system A2 (in particular, the overflow line 30, more specifically, the inlet of the overflow line 30), so as to minimize the disturbance to the oil level at the finding end during the oil filling process.

[0067] In the illustrated embodiment, the oil feeding line 12 is further provided with a one-way valve 14, which is arranged between the feeding member 13 and the oil filling tank 11 in the figure. In another embodiment, the one-way valve 14 can also be arranged between the feeding member 13 and the oil sump 201 (in particular, the oil filling port 202 in the figure). The one-way valve 14 can allow the oil to flow from the oil filling tank 11 to the oil sump 201, but prevent the oil from flowing in the opposite direction, i.e., from the oil sump 201 back to the oil filling tank 11. For example, the one-way valve 14 can be arranged to automatically close (i.e., shut off the oil feeding line 12) after the feeding member 13 stops working, thereby preventing the oil in the oil sump 201 from flowing back.

[0068] The oil consumption testing device 100 described above uses the temperature control unit 20 including the heater 22, so that the oil temperature of the added oil (i.e., the oil in the oil tank 11) is consistent with the oil temperature in the oil sump 201, i.e., the oil property parameters are consistent, thereby improving the test accuracy. Moreover, the oil consumption testing device 100 described above also uses the transparent overflow pipeline 30 to achieve the liquid level balance with the oil sump 201, so as to ensure that the liquid level of the oil sump 201 before and after the test is consistent.

[0069] The present application also provides an oil consumption measuring method, which can be used to measure the oil consumption value g of the diesel engine 200. m As described above, the diesel engine 200 has the oil sump 201 for collecting oil. The oil consumption measuring method provided by the present application uses the oil consumption testing device 100 described above.

[0070] The oil consumption measuring method can include the following steps, which will be described in sequence, including steps S1 to S8.

[0071] Step S1: The oil level in the oil sump 201 of the diesel engine 200 reaches a reference liquid level H0.

[0072] Step S1 can be considered as the oil level leveling before the test, and the reference liquid level H0 is the liquid level (or liquid surface) leveling reference. In the illustrated embodiment, the highest liquid level of the overflow pipeline 30 is the liquid level leveling reference.

[0073] In the illustrated embodiment, in step S1, the oil level (in the oil sump 201) can be brought to the reference liquid level H0 by the following steps S11 to S15.

[0074] Step S11: Start the diesel engine 200 to a predetermined condition and then stop, so that the oil in the engine falls back to the oil sump 201, under the condition that the feeding pipeline 12 and the overflow pipeline 30 of the oil consumption testing device 100 are both closed.

[0075] For example, when actually performing step S11, the stop valve 31 can be closed (thus, the overflow pipeline 30 is closed; since the feeding component 13 is not started, the feeding pipeline 12 is also closed), the diesel engine 200 is started to a specified operating condition, and then stopped after the oil temperature into the engine reaches a specified temperature. The predetermined condition can be considered as the oil temperature into the engine reaching the specified temperature under the specified operating condition. The oil in the engine can be caused to fall back to the oil sump 201 by performing the cranking operation at a specified frequency.

[0076] Step S12: Heat the oil in the oil tank 11 of the oil feeding unit 10 by the heater 22 of the temperature control unit 20 of the oil consumption testing device 100, until the temperature difference ΔT between the first oil temperature T1 and the second oil temperature T2 collected by the temperature collection assembly 21 of the temperature control unit 20 is within a predetermined temperature difference range.

[0077] Step S13, start the feeding component 13 of the oiling unit 10 of the oil consumption test device 100, open the feeding line 12, and further feed the oil to the oil sump 201.

[0078] Step S14, open the overflow line 30, and stop the feeding component 13 when oil is discharged from the overflow line 30.

[0079] For example, when actually performing the step S12, the step S13 and the step S14, the oil in the oiling tank 11 can be heated to the same temperature as the oil in the oil sump 201 (i.e. the temperature difference ΔT = 0). Then, the feeding component 13 of the automatic oiling system A1 is started, for example, so that the feeding component 13 feeds the oil to the oil sump 201 at the maximum flow rate. The overflow line 30 of the level equalization system A2 is observed, for example, by opening the stop valve 31, and the feeding component 13 is stopped when oil overflows.

[0080] It can be understood that the steps are described sequentially in the present disclosure, but the specific execution order of the steps is not limited, and the execution order between the steps can be changed as appropriate. For example, in one embodiment, the action of "opening" the overflow line 30 in the step S14 can be performed after the action of "starting" the feeding component 13 in the step S13, and in another embodiment, the action of "opening" the overflow line 30 can be performed substantially simultaneously with the action of "starting" the feeding component 13.

[0081] In the illustrated embodiment, the oil consumption test device 100 includes a level acquisition assembly 60. In the step S13, the feeding component 13 can be caused to feed the oil to the oil sump 201 at the maximum flow rate, and after the oil level is higher than the level alarm of the level acquisition assembly 60 (i.e. the level alarm sends an alarm signal), the feeding component 13 can be automatically switched to the minimum flow rate, for example, to continue feeding the oil to the oil sump 201. Then, the action of "opening the stop valve 31" in the step S14 is performed. That is, in the step S13, the feeding component 13 initially feeds the oil to the oil sump 201 at the maximum flow rate, and then switches to the minimum flow rate in response to the alarm signal sent by the level acquisition assembly 60. The stop valve 31 can be opened at the same time or after the feeding component 13 switches to the minimum flow rate.

[0082] Step S15, close the overflow line 30 when the flow rate of the oil discharged from the overflow line 30 reaches a predetermined flow rate range.

[0083] For example, when actually performing step S15, the overflow line 30 can be closed by closing the stop valve 31 when the oil dripping speed in the overflow line 30 is determined to be within a predetermined flow range, for example, 0-60 drops / min. That is, the predetermined flow range can be defined as 0-60 drops / min. It is to be understood that the term "range" herein includes not only a series of values, but also a plurality of discrete values, and can also include exactly one value, and "plurality" means two or more, including two, three, four, five, etc. In the preferred embodiment, the stop valve 31 is closed when the oil flow rate from the overflow line 30 reaches the predetermined flow range under the condition that the oil level is stable and undulating.

[0084] Step S2: Start the diesel engine 200 to a predetermined operating condition and run for a predetermined time period, and then stop the diesel engine 200, so that the oil in the diesel engine 200 returns to the oil sump 201, under the condition that both the feed line 12 and the overflow line 30 of the oil consumption test device 100 are closed.

[0085] Step S2 can be considered as a determination test. For example, the diesel engine 200 can be started to a predetermined operating condition as soon as possible and run for a predetermined time period (for example, the predetermined time period is t, in hours). For example, when the power of the diesel engine is ≥1000KW, the running time is ≥4 hours; when the power of the diesel engine is <1000KW, the running time is ≥12 hours.

[0086] Step S3: Heat the oil in the oil tank 11 of the oil feeding unit 10 by the heater 22 of the temperature control unit 20 of the oil consumption test device 100 until the temperature difference ΔT between the first oil temperature T1 and the second oil temperature T2 collected by the temperature collection assembly 21 of the temperature control unit 20 is within a predetermined temperature difference range.

[0087] Step S4: Start the feeding component 13 of the oil feeding unit 10 of the oil consumption test device 100, open the feed line 12, and further feed oil to the oil sump 201.

[0088] Step S5: Open the overflow line 30, and stop the feeding component 13 when oil is discharged from the overflow line 30.

[0089] Step S6: Close the overflow line 30 when the oil flow rate from the overflow line 30 reaches a predetermined flow range.

[0090] Steps S3 to S6 can be considered as oil level leveling after the test. They can generally correspond to steps S12 to S15 one by one.

[0091] Similarly to the step S13 mentioned above, in one embodiment, in the step S4, when the oil level in the sump 201 is higher than a predetermined level (i.e. the height of the level alarm of the level collection assembly 60), the feeding flow rate of the feeding component 13 can be reduced.

[0092] In the step S7, the oil quantity difference Δm between the oil quantity ml fed from the oil tank 11 and the oil quantity m2 drained from the overflow line 30 is obtained by the metering unit 40 of the oil consumption test device 100.

[0093] In the step S7, the oil quantity difference Δm can be obtained by obtaining the oil quantity ml fed from the oil tank 11 and the oil quantity m2 drained from the overflow line 30 respectively, and then subtracting the two. As mentioned above, the execution order of the steps is not necessarily limited by the order of the steps described above. The oil quantity ml fed from the oil tank 11 can be obtained by weighing the oil tank 11 before and after the oil is added in the steps S3 to S6. The oil quantity m2 drained from the overflow line 30 can be obtained by weighing the oil collected by the recovery tank 70 after the overflow line 30 is closed in the step S6.

[0094] In the step S8, the oil consumption value of the diesel engine 200 is calculated according to the operating parameters of the diesel engine 200 in the step S2 and the oil quantity difference Δm obtained in the step S7.

[0095] The step S8 can be referred to as oil consumption calculation. In the step S8, the oil consumption value can be obtained as quantitative data of the oil consumption.

[0096] Preferably, in the step S8, the oil consumption value can be calculated according to the following formula:

[0097]

[0098] wherein g m is the aforementioned oil consumption value, also referred to as the oil consumption rate, and the unit can be g / (kW·h), for example.

[0099] Δm is the oil quantity difference between the oil quantity ml fed from the oil tank 11 and the oil quantity m2 drained from the overflow line 30. That is, Δm = ml - m2. Wherein ml is the oil quantity fed from the oil tank 11, i.e. the weight of the added oil, i.e. the difference in the weight of the oil in the oil tank 11 before and after the test, and the unit can be kg, for example. m2 is the oil quantity drained from the overflow line 30, i.e. the weight of the recovered oil, i.e. the difference in the weight of the oil in the recovery tank 70 before and after the test, and the unit can be kg, for example.

[0100] P is the effective power of the aforementioned predetermined operating condition, that is, the effective power of the diesel engine test operating condition in step S2, and the unit can be, for example, kW.

[0101] t is the aforementioned predetermined time length, that is, the diesel engine test running time in step S2, and the unit can be, for example, hours.

[0102] The above-mentioned oil consumption measurement method improves and optimizes the liquid surface balance weight method, and on this basis, the aforementioned oil consumption test device is used to run for a predetermined time under a predetermined operating condition, and the difference between the oil input and the collected amount is calculated, and a calculation formula is proposed, so that the oil consumption value can be quantitatively calculated, and it is especially suitable for the diesel engine test verification stage.

[0103] The above-mentioned oil consumption test device has the characteristics of automation and visualization, and can effectively simplify the operation process of the oil consumption test, and greatly improve the test precision and efficiency. The elements used are all conventional engineering application components, which are low in cost and easy to assemble. Moreover, according to the test requirements, the above-mentioned oil consumption test device can be connected or removed at any time, and the application is flexible. The above-mentioned oil consumption test device does not need to modify the oil pan of the existing diesel engine product, and can be used by connecting the oil inlet and the oil outlet of the oil pan, and is suitable for a wide range of products, especially for marine diesel engines with large-capacity oil pans. A set of device can be applied to multiple diesel engine products, which can reduce cost and increase efficiency, and save energy.

[0104] Using the above-mentioned oil consumption test device and oil consumption measurement method, the oil consumption value of a certain type of diesel engine is tested and verified multiple times. The test error of the oil consumption value of the same diesel engine under the same test state is within ±5%. The verification result shows that the above-mentioned oil consumption test device and oil consumption measurement method have high precision, good feasibility, can greatly improve the test efficiency, and have high use value.

[0105] Although the present application is disclosed with the preferred embodiments as above, it is not intended to limit the present application, and any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present application. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, which does not deviate from the technical solutions of the present application, falls within the protection scope defined by the claims of the present application.

Claims

1. An oil consumption test apparatus for testing oil consumption of a diesel engine having an oil sump for collecting oil, characterized by, The oil consumption testing device comprises: a refueling unit, comprising: a refueling tank storing oil; a feeding pipeline connecting the refueling tank and the oil pan; and a feeding component arranged in the feeding pipeline for feeding oil from the refueling tank to the oil pan; a temperature control unit, comprising: a temperature acquisition assembly for acquiring a first oil temperature in the refueling tank and a second oil temperature in the oil pan; and a heater for heating oil in the refueling tank according to the first oil temperature and the second oil temperature; an overflow pipeline connected to the oil pan for discharging oil overflowing from the oil pan; and a metering unit for obtaining a difference in oil quantity between the amount of oil fed from the refueling tank and the amount of oil discharged from the overflow pipeline; The oil consumption testing device further comprises a control unit configured to: acquire the first oil temperature and the second oil temperature acquired by the temperature acquisition assembly, calculate a temperature difference between the first oil temperature and the second oil temperature, and control the start and stop of the heater according to the temperature difference; after the heater stops heating, start the feeding component, thereby feeding oil to the oil pan; The oil consumption testing device further comprises a liquid level acquisition assembly for acquiring the oil level in the oil pan; the control unit is configured to control the start and stop and / or flow switching of the feeding component according to the oil level acquired by the liquid level acquisition assembly; The highest liquid level of the overflow pipeline determines the reference liquid level of the oil pan; and the liquid level acquisition assembly is a liquid level alarm, the highest liquid level of the overflow pipeline is higher than the height at which the liquid level alarm is located; The overflow pipeline is a transparent pipeline made of transparent material; In the case that both the feeding pipeline and the overflow pipeline of the oil consumption testing device are closed, the diesel engine is controlled to start and stop under predetermined conditions, so that the oil in the engine falls back to the oil pan; The heater of the temperature control unit of the oil consumption testing device heats the oil in the refueling tank of the refueling unit until the temperature difference between the first oil temperature and the second oil temperature acquired by the temperature acquisition assembly of the temperature control unit is within a predetermined temperature difference range; The feeding component of the refueling unit of the oil consumption testing device is controlled to start, and the feeding pipeline is controlled to open, thereby feeding oil to the oil pan; wherein the feeding component is controlled to fill oil to the oil pan at a maximum flow rate, and in response to an alarm signal sent by the liquid level acquisition assembly, the feeding component is switched to a minimum flow rate to continue filling oil to the oil pan; The overflow pipeline is opened, and when oil is discharged from the overflow pipeline, the feeding component is stopped; when the flow rate of oil discharged from the overflow pipeline reaches a predetermined flow rate range, the overflow pipeline is closed, so that the oil level reaches the reference liquid level.

2. The oil consumption testing device of claim 1, wherein: the outlet of the feeding pipeline and the inlet of the overflow pipeline are respectively connected to the first side and the second side of the oil inlet port and the oil outlet port of the oil pan.

3. A method of measuring oil consumption for measuring an oil consumption value of a diesel engine having an oil pan for collecting oil, characterized by, The oil consumption testing device of claim 1 or 2 is used, wherein: Step S1, making the oil level in the oil sump of the diesel engine reach a reference level; Step S2, starting the diesel engine to a predetermined operating condition and running for a predetermined time period after the diesel engine is stopped with the feeding pipeline and the overflow pipeline of the oil consumption testing device being closed, and making the inboard oil return to the oil sump; Step S3, heating the oil in the oil tank of the oil feeding unit by the heater of the temperature control unit of the oil consumption testing device until the temperature difference between the first oil temperature and the second oil temperature collected by the temperature collection assembly of the temperature control unit is within a predetermined temperature difference range; Step S4, starting the feeding component of the oil feeding unit of the oil consumption testing device, opening the feeding pipeline, and then feeding oil to the oil sump; Step S5, opening the overflow pipeline, and stopping the feeding component when oil is discharged from the overflow pipeline; Step S6, closing the overflow pipeline when the oil flow discharged from the overflow pipeline reaches a predetermined flow range; Step S7, obtaining the oil quantity difference between the oil quantity fed from the oil tank and the oil quantity discharged from the overflow pipeline by the metering unit of the oil consumption testing device; Step S8, calculating the oil consumption value of the diesel engine according to the operating parameters of the diesel engine in Step S2 and the oil quantity difference obtained in Step S7.

4. The method of oil consumption measurement according to claim 3, wherein Wherein, In Step S4, the feeding flow of the feeding component is reduced when the oil level in the oil sump collected by the oil level collection assembly of the oil consumption testing device is higher than a predetermined level.

5. The oil consumption measurement method according to claim 3, wherein, In Step S8, the oil consumption value is calculated according to the following formula: wherein g m is the oil consumption value, Δm is the difference in oil quantity between the quantity of oil fed from the tank and the quantity of oil discharged from the overflow line, P is the effective power of the predetermined operating condition, and t is the predetermined time length.

Images