An engine supercharger air leakage measurement device and method

Abstract

The present invention relates to an engine supercharger air leakage measurement device and method, which includes: a gas supply circuit, which includes a gas supply source and a gas supply flowmeter connected to the gas supply source; a cooling circuit, which includes a cooling tank, and an air inlet of the cooling tank is communicated with the gas supply source; and a waste oil and gas circuit, which includes a supercharger and a mixture gas flowmeter, the supercharger is communicated with the air inlet of the cooling tank, and the mixture gas flowmeter is communicated with an air outlet of the cooling tank. By introducing a certain amount of gas through the gas supply circuit, mixing it with the gas leaked from the supercharger and then measuring them together, and using the flow rate of the mixed gas and the flow rate of the introduced gas, the air leakage amount of the supercharger can be calculated, thereby increasing the flow rate of the measured substance, making it meet the requirements of conventional measuring instruments, and at the same time, the measured value can also fall within the effective measurement range of the measuring instrument, ensuring measurement accuracy, achieving low cost and high measurement precision.

Description

Technical Field

[0001] The present invention relates to the field of engines, and particularly to an engine supercharger air leakage measurement device and method. Background Art

[0002] Currently, as an important component of an engine, a supercharger mainly increases the intake air volume of the engine and improves the engine power. At the same time, as a heat-receiving component, the working temperature of the supercharger is as high as over 600°C. Affected by factors such as heat and the sealing structure, there is a risk of air leakage in the supercharger seal. For example, when high-temperature gas enters the engine oil, it will not only increase the crankcase pressure and cause engine air leakage, but also deteriorate the heat performance of the engine oil and affect lubrication. To evaluate whether the supercharger air leakage is normal, it is necessary to first perform a supercharger air leakage measurement.

[0003] In related technologies, since the supercharger air leakage volume is relatively small and the measurement is difficult, there are few methods for measuring the supercharger air leakage volume, and the accuracy of the measurement results is low and the precision is not high.

[0004] Therefore, it is necessary to propose an engine supercharger air leakage measurement device and method to solve the above problems. Summary of the Invention

[0005] Embodiments of the present invention provide an engine supercharger air leakage measurement device and method to solve the problems in related technologies that the supercharger air leakage volume is relatively small, the measurement is difficult, and the accuracy and precision of the measurement results are not high.

[0006] In a first aspect, an engine supercharger air leakage measurement device is provided, which includes: a gas supply circuit including a gas supply source and a gas supply flowmeter connected to the gas supply source; a cooling circuit including a cooling tank, the intake port of the cooling tank being communicated with the gas supply source; and a waste oil and gas circuit including a supercharger and a mixture flowmeter, the supercharger being communicated with the intake port of the cooling tank, and the mixture flowmeter being communicated with the outlet port of the cooling tank.

[0007] In some embodiments, the gas supply circuit further includes a dryer connected to the gas supply source, and the gas supply flowmeter is connected to the dryer.

[0008] In some embodiments, the gas supply circuit further includes a pressure regulating valve connected to the dryer, and the gas supply flowmeter is connected to the pressure regulating valve.

[0009] In some embodiments, a cooled oil storage cavity is provided in the cooling tank, and the cooled oil storage cavity is connected to the engine oil sump.

[0010] In some embodiments, the mixture flowmeter is connected to the engine combustion chamber through an engine intake pipe.

[0011] In a second aspect, a method for measuring the air leakage amount of an engine supercharger is provided, which includes the following steps: Start the air supply source to supply air to the cooling tank, and measure the air supply flow rate Q1 using an air supply flowmeter; Cool the oil-gas mixture from the supercharger using the cooling tank and allow gas to precipitate; Measure the mixed gas flow rate Q2 in the cooling tank using a mixed gas flowmeter; Calculate the air leakage amount of the supercharger based on the mixed gas flow rate Q2 and the air supply flow rate Q1.

[0012] In some embodiments, after starting the air supply source to supply air to the cooling tank, it further includes: Drying the gas provided by the air supply source using a dryer.

[0013] In some embodiments, after drying the gas provided by the air supply source using a dryer, it further includes: Adjusting the gas after passing through the dryer using a pressure regulating valve, and the pressure-adjusted gas enters the air supply flowmeter.

[0014] In some embodiments, after cooling the oil-gas mixture from the supercharger using the cooling tank and allowing gas to precipitate, it further includes: Driving the separated engine oil into the engine oil sump.

[0015] In some embodiments, after measuring the mixed gas flow rate Q2 in the cooling tank using the mixed gas flowmeter, it further includes: Driving the mixed gas into the engine combustion chamber through the engine intake pipe to participate in combustion.

[0016] The beneficial effects brought by the technical solution provided by the present invention include:

[0017] The embodiments of the present invention provide an engine supercharger air leakage amount measuring device and method. By introducing a certain amount of gas through an air supply circuit, mixing it with the gas leaked from the supercharger and then measuring them together, and using the flow rate of the mixed gas and the introduced gas flow rate, the air leakage amount of the supercharger can be calculated. Thereby, the flow rate of the measured substance is increased, meeting the requirements of conventional measuring instruments, and at the same time, the measured value can fall within the effective measurement range of the measuring instrument, ensuring measurement accuracy, achieving low cost and high measurement precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of an engine supercharger air leakage amount measuring device provided by an embodiment of the present invention;

[0020] Figure 2Schematic diagram of the cooling tank of an engine supercharger air leakage measurement device provided by an embodiment of the present invention;

[0021] Figure 3 Flow chart of a method for measuring the air leakage amount of an engine supercharger provided by an embodiment of the present invention.

[0022] Reference numerals in the figure:

[0023] 1. Air supply source; 2. Supercharger; 3. Cooling tank; 31. Heat exchanger; 32. Cooling tank partition; 33. Cooling tank gas storage cavity; 34. Oil-gas separation plate; 35. Oil storage cavity after cooling; 36. Oil-gas oil storage cavity; 4. Cooling water system; 5. Engine oil sump; 6. Mixture gas flow meter; 7. Mixture gas pressure sensor; 8. Mixture gas temperature sensor; 9. Engine combustion chamber; 10. Engine intake pipe; 11. Pressure regulating valve; 12. Dryer; 13. Air supply temperature sensor; 14. Air supply flow meter; 15. Air supply pressure sensor. Detailed implementation manners

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] The embodiments of the present invention provide an engine supercharger air leakage measurement device and method to solve the problems in the related art that the air leakage amount of the supercharger is relatively small, the measurement difficulty is large, and the accuracy and precision of the measurement results are not high.

[0026] See Figure 1 As shown, an engine supercharger air leakage measurement device provided by an embodiment of the present invention may include: an air supply circuit, which includes an air supply source 1 and an air supply flow meter 14 connected to the air supply source 1; a cooling circuit, which includes a cooling tank 3, and an air inlet of the cooling tank 3 is communicated with the air supply source 1; and a waste oil and gas circuit, which includes a supercharger 2 and a mixture gas flow meter 6, the supercharger 2 is communicated with the air inlet of the cooling tank 3, and the mixture gas flow meter 6 is communicated with an air outlet of the cooling tank 3.

[0027] In this embodiment, the gas supply circuit is used to introduce a certain amount of gas into the cooling circuit. Specifically, the gas supply source 1 is connected to the gas supply flowmeter 14, and the gas supply flowmeter 14 is connected to the cooling tank 3. The gas supply source 1 supplies gas through the gas supply flowmeter 14. The gas supply flowmeter 14 is used to measure the gas flow provided by the gas supply source 1. The gas after being measured by the gas supply flowmeter 14 enters the cooling circuit. The cooling circuit is used to cool the oil-gas mixture from the supercharger 2 and separate the gas therein, and mix it with the gas from the gas supply source 1. Specifically, the cooling tank 3 is connected to the supercharger 2, and the leaked oil-gas mixture from the supercharger 2 enters the cooling tank 3. The temperature in the cooling tank 3 is lower than the temperature of the oil-gas mixture, which can accelerate the precipitation rate of the gas therein. The precipitated gas is mixed with the gas from the gas supply source 1. The mixed gas flowmeter 6 is connected to the cooling tank 3 and can measure the flow of the mixed gas in the cooling tank 3. Subtracting the gas supply flow of the gas supply source 1 from the flow of the mixed gas is the air leakage amount of the supercharger 2. By introducing a certain amount of gas through the gas supply circuit, mixing it with the gas leaked from the supercharger 2 and then measuring them together, and using the flow of the mixed gas and the introduced gas flow, the air leakage amount of the supercharger 2 can be calculated. Thus, the flow of the measured substance is increased to meet the requirements of conventional measuring instruments, and at the same time, the measured value can fall within the effective measurement range of the measuring instrument, ensuring measurement accuracy and achieving low cost and high measurement precision.

[0028] See Figure 1 As shown, further, the gas supply circuit may further include a dryer 12. The dryer 12 is connected to the gas supply source 1, and the gas supply flowmeter 14 is connected to the dryer 12. In this embodiment, the inlet end of the dryer 12 is connected to the gas supply source 1, and the outlet end of the dryer 12 is connected to the gas supply flowmeter 14. By drying the gas provided by the gas supply source 1 through the dryer 12, the water vapor in the gas can be reduced, so that the gas flow measured by the gas supply flowmeter 14 is more accurate, excluding the interference of other factors, and making the calculation result of the air leakage amount of the supercharger 2 more accurate. During measurement, the gas supply source 1 supplies gas into the dryer 12 for drying. The dried gas is measured for flow by the gas supply flowmeter 14. The gas after being measured by the gas supply flowmeter 14 enters the cooling tank 3. The cooling tank 3 cools the oil-gas mixture of the supercharger 2 and mixes the gas leaked from the supercharger 2 with the gas from the gas supply source 1. The mixed gas is measured for flow by the mixed gas flowmeter 6. According to the measurement data of the gas supply flowmeter 14 and the mixed gas flowmeter 6, the air leakage amount of the supercharger 2 can be calculated.

[0029] See Figure 1As shown, further, the air supply circuit may further include a pressure regulating valve 11. The pressure regulating valve 11 is connected to the dryer 12, and the air supply flowmeter 14 is connected to the pressure regulating valve 11. In this embodiment, the inlet end of the pressure regulating valve 11 is connected to the dryer 12, and the outlet end of the pressure regulating valve 11 is connected to the air supply flowmeter 14. Since the gas flow rate changes with the gas pressure, by adjusting the pressure of the gas provided by the air supply source 1 through the pressure regulating valve 11, the gas flow rate provided by the air supply source 1 can be better controlled. Different flow rates of gas can be provided as needed during measurement, making the measurement result more accurate. During measurement, the gas provided by the air supply source 1 enters the dryer 12 for drying. The dried gas is adjusted in pressure by the pressure regulating valve 11. The gas with adjusted pressure is measured for flow rate by the air supply flowmeter 14. The gas after being measured by the air supply flowmeter 14 enters the cooling tank 3. The cooling tank 3 increases the oil-gas mixture of the supercharger 2 and mixes the gas leaked from the supercharger 2 with the gas from the air supply source 1. The mixed gas is measured for flow rate by the mixed gas flowmeter 6. According to the measurement data of the air supply flowmeter 14 and the mixed gas flowmeter 6, the air leakage amount of the supercharger 2 can be calculated.

[0030] See Figure 1 As shown, further, the air supply circuit may further include an air supply temperature sensor 13. The air supply temperature sensor 13 is installed on the pipeline between the pressure regulating valve 11 and the air supply flowmeter 14. In this embodiment, since the gas flow rate changes with the gas temperature, by detecting the temperature of the gas provided by the air supply source 1 through the air supply temperature sensor 13, the temperature of the gas provided by the air supply source 1 can be better controlled. Different temperatures of gas can be provided as needed during measurement, and the temperature of the gas provided by the air supply source 1 can be compared with the temperature of the mixed gas, and the difference caused by the influence of the temperature difference before and after gas mixing on the gas flow rate can be calculated, so as to reduce the interference of the temperature factor on the gas flow rate and make the measurement result more accurate. During measurement, the gas provided by the air supply source 1 enters the dryer 12 for drying. The dried gas is adjusted in pressure by the pressure regulating valve 11. The gas with adjusted pressure is measured for temperature by the air supply temperature sensor 13, and then the flow rate is measured by the air supply flowmeter 14. The gas after being measured by the air supply flowmeter 14 enters the cooling tank 3. The cooling tank 3 increases the oil-gas mixture of the supercharger 2 and mixes the gas leaked from the supercharger 2 with the gas from the air supply source 1. The mixed gas is measured for flow rate by the mixed gas flowmeter 6. According to the measurement data of the air supply flowmeter 14 and the mixed gas flowmeter 6, the air leakage amount of the supercharger 2 can be calculated.

[0031] See Figure 1As shown, further, the air supply circuit may further include an air supply pressure sensor 15, which is installed on the pipeline between the pressure regulating valve 11 and the air supply flowmeter 14. In this embodiment, since the gas flow rate changes with the gas pressure, by detecting the pressure of the gas provided by the air supply source 1 through the air supply pressure sensor 15, the pressure of the gas provided by the air supply source 1 can be better controlled. Different pressures of gas can be provided according to needs during measurement, and the pressure of the gas provided by the air supply source 1 can be compared with the pressure of the mixed gas, and the difference caused by the influence of the pressure difference before and after gas mixing on the gas flow rate can be calculated, so as to reduce the interference of the pressure factor on the gas flow rate and make the measurement result more accurate; during measurement, the gas provided by the air supply source 1 enters the dryer 12 for drying, the dried gas is regulated in pressure by the pressure regulating valve 11, the gas after pressure regulation is measured for temperature by the air supply temperature sensor 13 and for pressure by the air supply pressure sensor 15, and then the flow rate is measured by the air supply flowmeter 14. The gas after being measured by the air supply flowmeter 14 enters the cooling box 3, the cooling box 3 increases the oil-gas mixture of the supercharger 2, and mixes the gas leaked from the supercharger 2 with the gas from the air supply source 1. The mixed gas is measured for flow rate by the mixed gas flowmeter 6. According to the measurement data of the air supply flowmeter 14 and the mixed gas flowmeter 6, the air leakage amount of the supercharger 2 can be calculated.

[0032] See Figure 2 As shown, further, a heat exchanger 31 is provided inside the cooling box 3. The heat exchanger 31 is connected to the cooling water system. The heat exchanger 31 divides the interior of the cooling box 3 into two cavities. The cavity on the side of the cooling box 3 connected to the supercharger 2 is the oil-gas storage cavity 36 for storing the oil-gas mixture from the supercharger 2. The cavity on the side of the cooling box 3 connected to the mixed gas flowmeter 6 is the cooled oil-gas storage cavity 35 for storing the gas cooled by the heat exchanger 31. An oil-gas separation plate 34 is provided above the cooled oil-gas storage cavity 35. The oil-gas separation plate 34 is provided with filter holes for filtering the engine oil in the cooled gas. The oil-gas separation plate 34 is connected to the cooling box 3 through the cooling box partition plate 32. The oil-gas separation plate 34 and the cooling box partition plate 32 divide the upper part of the cooled oil-gas storage cavity 35 into another cavity. Both the air supply flowmeter 14 and the mixed gas flowmeter 6 are connected to this separated cavity; during use, the oil-gas mixture from the supercharger 2 enters the oil-gas storage cavity 36. The oil-gas mixture in the oil-gas storage cavity 36 is cooled by the heat exchanger 31 to precipitate the gas therein. The separated gas and engine oil enter the cooled oil-gas storage cavity 35. The gas is filtered by the oil-gas separation plate 34 and mixed with the gas from the air supply source 1, and then enters the mixed gas flowmeter 6 for measurement.

[0033] See Figure 2As shown, further, a post-cooling oil storage cavity 35 may be provided in the cooling box 3. The post-cooling oil storage cavity 35 is connected to the engine oil sump 5. In this embodiment, the oil-gas mixture from the supercharger 2 enters the oil-gas storage cavity 36. The oil-gas mixture in the oil-gas storage cavity 36 is cooled by the heat exchanger 31 to precipitate the gas therein. The separated gas and engine oil enter the post-cooling oil storage cavity 35. The gas is filtered by the oil-gas separation plate 34 and then mixed with the gas from the gas supply source 1, and then enters the mixture gas flowmeter 6 for measurement. The separated engine oil enters the engine oil sump 5, which can lubricate the engine oil sump 5. By recycling the engine oil leaked from the supercharger 2, waste can be reduced and costs can be saved.

[0034] See Figure 1 As shown, further, the mixture gas flowmeter 6 is connected to the engine combustion chamber 9 through the engine intake pipe 10. In this embodiment, the intake end of the mixture gas flowmeter 6 is connected to the cooling box 3, and the outlet end of the mixture gas flowmeter 6 is connected to the engine intake pipe 10. By feeding the mixed gas into the engine combustion chamber 9 for combustion, the impact of the input air on the interior of the engine can be reduced, ensuring the normal operation of the engine. During measurement, the cooling box 3 cools the oil-gas mixture from the supercharger 2 and mixes the gas leaked from the supercharger 2 with the gas from the gas supply source 1. The mixed gas is measured for flow by the mixture gas flowmeter 6. The gas after flow measurement enters the engine combustion chamber 9 through the engine intake pipe 10 for combustion, thus completing the entire measurement step. According to the measurement data of the gas supply flowmeter 14 and the mixture gas flowmeter 6, the air leakage amount of the supercharger 2 can be calculated.

[0035] See Figure 1As shown, further, the waste oil and gas circuit may further include a mixture gas pressure sensor 7, and the mixture gas pressure sensor 7 is installed on the pipeline between the engine intake pipe 10 and the mixture gas flowmeter 6. In this embodiment, since the gas flow changes with the change of gas pressure, after the gas provided by the gas supply source 1 is mixed with the gas leaked from the supercharger 2, the mixture gas pressure sensor 7 is used to detect the pressure of the mixed gas, so as to better control the pressure of the mixed gas. By comparing the pressure of the gas provided by the gas supply source 1 with the pressure of the mixed gas, and calculating the difference in the gas flow caused by the pressure difference before and after gas mixing, the interference of the pressure factor on the gas flow can be reduced, and the measurement result can be made more accurate; during measurement, the gas provided by the gas supply source 1 enters the dryer 12 for drying, the dried gas is regulated in pressure by the pressure regulating valve 11, the gas after pressure regulation is measured for temperature by the gas supply temperature sensor 13 and for pressure by the gas supply pressure sensor 15, then the gas is measured for flow by the gas supply flowmeter 14, the gas after being measured by the gas supply flowmeter 14 enters the cooling box 3, the cooling box 3 cools the oil and gas mixture of the supercharger 2, and mixes the gas leaked from the supercharger 2 with the gas from the gas supply source 1. The mixed gas is measured for flow by the mixture gas flowmeter 6, the measured mixed gas is measured for pressure by the mixture gas pressure sensor 7, and the gas after pressure measurement enters the engine combustion chamber 9 through the engine intake pipe 10 for combustion. According to the measurement data of the gas supply flowmeter 14 and the mixture gas flowmeter 6, the air leakage amount of the supercharger 2 can be calculated.

[0036] See Figure 1As shown, further, the waste oil and gas circuit may further include a mixture gas temperature sensor 8, and the mixture gas temperature sensor 8 is installed on the pipeline between the engine intake pipe 10 and the mixture gas flowmeter 6. In this embodiment, since the gas flow changes with the gas temperature, after the gas provided by the gas supply source 1 is mixed with the gas leaked from the supercharger 2, the temperature of the mixed gas is detected by the mixture gas temperature sensor 8, so that the temperature of the mixed gas can be better controlled. By comparing the temperature of the gas provided by the gas supply source 1 with the temperature of the mixed gas, and calculating the difference caused by the influence of the temperature difference before and after gas mixing on the gas flow, the interference of the temperature factor on the gas flow can be reduced, and the measurement result can be made more accurate; during measurement, the gas provided by the gas supply source 1 enters the dryer 12 for drying, the dried gas is regulated in pressure by the pressure regulating valve 11, the gas after pressure regulation is measured for temperature by the gas supply temperature sensor 13, measured for pressure by the gas supply pressure sensor 15, then the flow is measured by the gas supply flowmeter 14, the gas after being measured by the gas supply flowmeter 14 enters the cooling box 3, the cooling box 3 cools the oil and gas mixture of the supercharger 2, and mixes the gas leaked from the supercharger 2 with the gas from the gas supply source 1. The mixed gas is measured for flow by the mixture gas flowmeter 6, the mixed gas after measurement is measured for pressure by the mixture gas pressure sensor 7, and measured for temperature by the mixture gas temperature sensor 8. The gas after measuring the pressure and temperature enters the engine combustion chamber 9 through the engine intake pipe 10 for combustion. According to the measurement data of the gas supply flowmeter 14 and the mixture gas flowmeter 6, the air leakage amount of the supercharger 2 can be calculated.

[0037] The implementation process of this measuring device is as follows: The gas supply source 1 supplies air, which enters the dryer 12 for drying, then enters the pressure regulating valve 11 for pressure regulation, and then enters the gas supply flowmeter 14 to measure the intake air volume of this part. At the same time, the gas supply temperature and pressure are measured by the gas supply temperature sensor 13 and the gas supply pressure sensor 15; the supercharger 2 leaks oil into the oil and gas storage cavity 36 of the cooling box 3, enters the cooled oil storage cavity 35 after passing through the heat exchanger 31, the engine oil enters the engine oil sump 5 through the oil outlet and oil pipe of the cooling box 3, and the waste gas in the engine oil flows through the oil and gas separation plate 34 and flows into the downstream mixture gas flowmeter 6 together with the gas supply from the gas supply flowmeter 14 to measure the flow of this mixture gas. At the same time, the temperature and pressure are respectively measured by the mixture gas pressure sensor 7 and the mixture gas temperature sensor 8. The mixture gas enters the engine combustion chamber 9 through the engine intake pipe 10 to participate in combustion. Finally, the air leakage amount of the supercharger engine oil is obtained by subtracting the measured value Q1 of the gas supply flowmeter 14 from the measured value Q2 of the mixture gas flowmeter 6.

[0038] See Figure 3 As shown, a method for measuring the air leakage amount of an engine supercharger provided by an embodiment of the present invention may include the following steps:

[0039] S1. Start the gas supply source 1 to supply gas to the cooling box 3, and measure the gas supply flow rate Q1 using the gas supply flowmeter 14.

[0040] S2. Use the cooling box 3 to cool the oil-gas mixture from the supercharger 2 and separate out the gas.

[0041] S3. Measure the mixed gas flow rate Q2 in the cooling box 3 using the mixed gas flowmeter 6; calculate the supercharger air leakage based on the mixed gas flow rate Q2 and the gas supply flow rate Q1.

[0042] In this embodiment, a certain amount of gas is introduced through the gas supply circuit, mixed with the gas leaked from the supercharger 2 and then measured together. By using the flow rate of the mixed gas and the flow rate of the introduced gas, the air leakage of the supercharger 2 can be calculated, thereby increasing the flow rate of the measured substance to meet the requirements of conventional measuring instruments. At the same time, the measured value can also fall within the effective measurement range of the measuring instrument, ensuring measurement accuracy, achieving low cost and high measurement precision.

[0043] See Figure 3 As shown, further, after starting the gas supply source 1 to supply gas to the cooling box 3, it may further include: drying the gas provided by the gas supply source 1 using the dryer 12. By drying the gas provided by the gas supply source 1 through the dryer 12, the water vapor in the gas can be reduced, so that the gas flow rate measured by the gas supply flowmeter 14 is more accurate, excluding the interference of other factors, and making the calculation result of the final air leakage of the supercharger 2 more accurate.

[0044] See Figure 3 As shown, further, after drying the gas provided by the gas supply source 1 using the dryer 12, it may further include: adjusting the gas after passing through the dryer 12 using the pressure regulating valve 11. The regulated gas enters the gas supply flowmeter 14. By regulating the pressure of the gas provided by the gas supply source 1 through the pressure regulating valve 11, the gas flow rate provided by the gas supply source 1 can be better controlled, and different flow rates of gas can be provided as needed during measurement, making the measurement result more accurate.

[0045] See Figure 3 As shown, further, after using the cooling box 3 to cool the oil-gas mixture from the supercharger 2 and separate out the gas, it may further include: driving the separated engine oil into the engine oil sump 5. By making the separated engine oil enter the engine oil sump 5, the engine oil sump 5 can be lubricated. By recycling and reusing the engine oil leaked from the supercharger 2, waste can be reduced and costs can be saved.

[0046] See Figure 3As shown, further, after measuring the flow rate Q2 of the mixed gas in the cooling tank 3 by using the mixed gas flowmeter 6, the following steps may further be included: driving the mixed gas to enter the engine combustion chamber 9 through the engine intake pipe 10 to participate in combustion. By sending the mixed gas into the engine combustion chamber 9 for combustion, the influence of the input air on the interior of the engine can be reduced, ensuring the normal operation of the engine.

[0047] During use, the steps are as follows:

[0048] First, calibrate the mixed gas flowmeter 6 and the air supply flowmeter 14 to make the measurements of the two flowmeters consistent.

[0049] Second, obtain the air supply flow rate Q1. The air supply system provides dry and stable intake air, and this flow rate is measured by the air supply flowmeter 14.

[0050] Third, obtain the flow rate Q2 of the mixed gas. The air supply from the previous step is mixed with the gas separated from the supercharger oil and flows out of the cooling tank 3, and this mixed gas flow rate is measured by the mixed gas flowmeter 6.

[0051] The principle of an automotive steering system adjustment tool provided by an embodiment of the present invention is as follows:

[0052] For problems such as small air leakage in the supercharger 2 and difficulty in measurement by conventional means, this article proposes to increase the flow rate of the gas to be measured, that is, introduce a certain amount of the same kind of substance together with the substance to be measured as the measured object, so as to meet the usage requirements of conventional measuring instruments. At the same time, the measured value can also fall within the effective measurement range of the measuring instrument, ensuring measurement accuracy. The solution in this article has a low implementation cost and high measurement accuracy. Based on this idea, this article proposes to take a part of the gas from an external air source (the engine air supply can also be used), after drying and pressure regulation, and then enter the cooling tank 3 after being measured by the air supply flowmeter 14, flow downstream together with the air leakage from the supercharger oil, enter the mixed gas flowmeter 6, and after measurement, enter the engine intake pipe 10 as a part of the engine intake air to participate in the in-cylinder combustion of the engine. During this process, one flowmeter measures the external air supply flow rate Q1, and the other flowmeter measures the flow rate Q2 of the mixed gas of the external intake air and the supercharger air leakage. The difference between the measured value Q2 of the mixed gas flowmeter 6 and the measured value Q1 of the air supply flowmeter 14 is the air leakage amount of the supercharger 2.

[0053] Among them, the air supply circuit mainly provides stable air supply for the measurement system. The cooling circuit mainly cools the oil return of the supercharger. The waste gas and oil circuit mainly introduces waste gas into the engine intake pipe 10 to enter the combustion chamber for combustion, and introduces the cooled oil return of the supercharger into the engine oil pan 5. The air supply source 1 mainly provides stable intake air for the system, which can be the engine intake air or other gases. The dryer 12 filters the air supply introduced into the box. The pressure regulating valve 11 regulates the air supply pressure to provide constant-pressure air supply. The air supply temperature sensor 13 and the air supply pressure sensor 15 measure the air supply temperature and pressure. The air supply flowmeter 14 mainly measures the air supply flow rate. The cooling box 3 mainly conducts treatments such as cooling the oil return of the supercharger, cooling and separating the oil and gas, etc. The mixture flowmeter 6 mainly measures the waste gas flowing out of the cooling box 3. The mixture temperature sensor 8 and the mixture pressure sensor 7 measure the temperature and pressure of the waste gas after passing through the cooling box 3.

[0054] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. Unless otherwise clearly specified and defined, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] It should be noted that in the present invention, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0056] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for measuring the air leakage of an engine supercharger, characterized in that it includes a device for measuring the air leakage of an engine supercharger, which comprises: A gas supply circuit, which includes a gas supply source (1) and a gas supply flowmeter (14) connected to the gas supply source (1); A cooling circuit, which includes a cooling tank (3), and the air inlet of the cooling tank (3) is communicated with the gas supply source (1); And an exhaust gas and oil circuit, which includes a supercharger (2) and a mixture gas flowmeter (6), the supercharger (2) is communicated with the air inlet of the cooling tank (3), and the mixture gas flowmeter (6) is communicated with the air outlet of the cooling tank (3); The measurement method includes the following steps: Start the gas supply source (1) to supply gas to the cooling tank (3), and use the gas supply flowmeter (14) to measure the gas supply flow Q1; Use the cooling tank (3) to cool the oil and gas mixture from the supercharger (2) and separate out the gas; Use the mixture gas flowmeter (6) to measure the mixed gas flow Q2 in the cooling tank (3); Calculate the air leakage of the supercharger according to the mixed gas flow Q2 and the gas supply flow Q1.

2. The method for measuring the air leakage of an engine supercharger according to claim 1, characterized in that: The gas supply circuit further includes a dryer (12), the dryer (12) is connected to the gas supply source (1), and the gas supply flowmeter (14) is connected to the dryer (12).

3. The method for measuring the air leakage of an engine supercharger according to claim 2, characterized in that: The gas supply circuit further includes a pressure regulating valve (11), the pressure regulating valve (11) is connected to the dryer (12), and the gas supply flowmeter (14) is connected to the pressure regulating valve (11).

4. The method for measuring the air leakage of an engine supercharger according to claim 1, characterized in that: A cooled oil storage cavity (35) is provided in the cooling tank (3), and the cooled oil storage cavity (35) is connected to the engine oil sump (5).

5. The method for measuring the air leakage of an engine supercharger according to claim 1, characterized in that: The mixture gas flowmeter (6) is connected to the engine combustion chamber (9) through the engine intake pipe (10).

6. The method for measuring the air leakage of an engine supercharger according to claim 1, characterized in that, After starting the gas supply source (1) to supply gas to the cooling tank (3), it further includes: Use the dryer (12) to dry the gas provided by the gas supply source (1).

7. The method for measuring the air leakage amount of an engine supercharger according to claim 6, wherein After using the dryer (12) to dry the gas provided by the gas supply source (1), it further includes: Use the pressure regulating valve (11) to regulate the gas after passing through the dryer (12), and the regulated gas enters the gas supply flowmeter (14).

8. The method for measuring the air leakage amount of an engine supercharger according to claim 1, characterized in that, After using the cooling tank (3) to cool the oil and gas mixture from the supercharger (2) and separate out the gas, it further includes: Drive the separated engine oil into the engine oil sump (5).

9. The method for measuring the air leakage amount of an engine supercharger according to claim 1, wherein, After using the mixture gas flowmeter (6) to measure the mixed gas flow Q2 in the cooling tank (3), it further includes: Drive the mixed gas into the engine combustion chamber (9) through the engine intake pipe (10) to participate in combustion.

Images