JP2014084734A - Measuring apparatus and measuring method of engine oil consumption - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a measuring apparatus and a measuring method of engine oil consumption, capable of calculating a measurement error of a continuous gravimeter for measuring the engine oil consumption.SOLUTION: An engine oil consumption measuring apparatus 100 for measuring consumption of engine oil consumed by an engine 10 includes: a continuous gravimeter 20 for measuring weight of a feeding tank 25 capable of storing engine oil and feeding the stored engine oil to an oil pan 15 included in the engine 10; a highly accurate scale 36 for dropping the engine oil from the oil pan 15 and detecting a dropped quantity of the dropped engine oil; and a controller 50 for comparing a detection value of the highly accurate scale 36 with a measurement value of the continuous gravimeter 20 and calculating a measurement error of the continuous gravimeter 20, to measure the quantity of the engine oil consumed by the engine 10 on the basis of the calculation value of the highly accurate scale 36 and the measurement value of the continuous gravimeter 20.

Description

  The present invention relates to a technique for measuring and measuring a method for measuring engine oil consumption.

  In the engine manufacturing stage, tests are performed to actually drive the engine and check the consumption of engine oil. As described above, in a test for confirming the amount of consumption of engine oil, a continuous weight method in which the remaining amount of engine oil in the engine oil pan is directly measured by a load cell is well known.

  For example, Patent Document 1 discloses an apparatus for measuring engine oil consumption by a continuous weight method. In the engine oil consumption measuring device disclosed in Patent Document 1, the oil level of the oil pan is adjusted by a supply and suction pump provided in the oil tank, and the oil consumption is measured by the oil quantity in the oil tank measured by the load cell. Measure.

  However, in a measurement device for engine oil consumption using the continuous weight method as disclosed in Patent Document 1, when a variation occurs in the measurement result, the cause of the variation is a measurement error of the measurement device (continuous weight meter). Whether the engine is abnormal or not can not be determined at present. Therefore, in order to ensure measurement reliability such as an engine oil consumption test, an engine oil consumption measuring device is desired to calculate a measurement error of the measuring device.

Japanese Utility Model Publication No. 05-047320

  The problem to be solved by the present invention is to provide an engine oil consumption measuring apparatus and measuring method capable of calculating a measurement error of a continuous weigh scale that measures consumption of engine oil.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, in claim 1, an engine oil consumption measuring device for measuring consumption of engine oil consumed by an engine, wherein the engine oil is stored, and the stored engine oil is stored in the engine. A continuous weigh scale that measures the weight of a replenishment tank that can be replenished to the pan, a detector that drops engine oil from the oil pan, and that detects the dripping amount of the dropped engine oil, and a detection value of the detector And a calculation unit that compares the measurement value of the continuous weighing scale and calculates a measurement error of the continuous weighing scale, and based on the calculation value of the calculation unit and the measurement value of the continuous weighing scale It measures the amount of engine oil consumed by the engine.

  In Claim 2, It is a measuring apparatus of the engine oil consumption of Claim 1, Comprising: The measurement error calculation which calculates the measurement error of the said continuous weighing machine by the said detector, the said continuous weighing machine, and the said calculation part A system is configured, and an engine oil consumption measuring system for measuring engine oil consumption by the engine is configured by the continuous weigh scale and the calculation unit.

  In Claim 3, It is an engine oil consumption measuring device of Claim 1 or Claim 2, Comprising: The dripped engine oil uses the predetermined amount of engine oil stored in the oil pan per unit time. It is dropped by a dropping device for dropping, and the continuous weight meter measures the weight per unit time of the replenishing tank by a load cell.

  According to a fourth aspect of the present invention, measurement of engine oil consumption is performed by measuring consumption of engine oil consumed by the engine using the continuous weigh scale that measures a decrease amount of engine oil stored in an engine oil pan. A method of simulating the consumption of engine oil stored in the oil pan of the engine, measuring the amount of engine oil consumed in a pseudo manner, and storing the oil in the oil pan by the continuous weigh scale The engine oil consumption is measured and the measured value of the engine oil consumption that is artificially consumed and the measurement value of the reduction amount of the engine oil that is stored in the oil pan are artificially consumed. The measurement value of the continuous weigh scale is calculated by comparing the measured value of the oil amount as a true value.

  In Claim 5, It is a measuring method of the engine oil consumption of Claim 4, Comprising: The measurement error calculation process of calculating the measurement error of the said continuous weigh scale, and discriminating the quality of the said continuous weigh scale; In the measurement error calculating step, the engine oil consumption measuring step of measuring the engine oil consumption by the engine using the continuous weight meter determined to be good is provided.

  According to the engine oil consumption measuring device and the measuring method of the present invention, it is possible to calculate a measurement error of a continuous weigh scale that measures engine oil consumption.

The schematic diagram which showed the engine oil consumption measuring device. The flowchart which showed the flow of the engine oil consumption measuring process. The flowchart which showed the flow of the error calculation process. The flowchart which showed the flow of the engine oil consumption calculation process.

The engine oil consumption measuring device 100 will be described with reference to FIG.
In addition, in FIG. 1, the engine oil consumption measuring device 100 is represented typically. Moreover, the broken line of FIG. 1 represents the electric signal line.

  The engine oil consumption measuring device 100 is an embodiment of the engine oil consumption measuring device according to the present invention. The engine oil consumption measuring device 100 is a device that measures the amount of engine oil consumed by the engine 10 before factory shipment in an engine manufacturing process of an automobile factory. The engine oil consumption measuring device 100 includes a continuous weigh scale 20, a pseudo engine oil consumption device 30, and a controller 50 as a calculation unit.

  The engine 10 includes a cylinder head 11 and a cylinder block 12. An oil pan 15 is provided below the cylinder block 12. The oil pan 15 stores engine oil that lubricates the sliding portion of the engine 10.

  The continuous weigh scale 20 measures a reduction amount of the engine oil stored in the oil pan 15 per unit time. The continuous weigh scale 20 includes a supply pipe 21, a suction pipe 22, a supply tank 25, and a load cell 26.

  The supply pipe 21 returns the engine oil temporarily stored in the supply tank 25 to the oil pan 15 again. The supply pipe 21 communicates the supply tank 25 of the continuous weighing scale 20 with the oil pan 15 of the engine 10. A supply pump 23 is provided in the supply pipe 21.

  The suction pipe 22 sucks the engine oil stored in the oil pan 15 in order to temporarily store it in the supply tank 25. The suction pipe 22 communicates the replenishment tank 25 of the continuous weigh scale 20 with the oil pan 15 of the engine 10. A suction pump 24 is provided in the middle of the suction pipe 22.

  The supply tank 25 temporarily stores the engine oil stored in the oil pan 15. The supply tank 25 communicates with the oil pan 15 of the engine 10 through the supply pipe 21 and the suction pipe 22.

  In the supply tank 25, the engine oil is sent to the oil pan 15 or the engine oil in the oil pan 15 is sent by the supply pump 23 and the suction pump 24 so that the amount of stored engine oil becomes constant. Is done.

  Further, in the supply tank 25, when the engine oil in the oil pan 15 is consumed and decreased, the supply pump 23 and the suction pump 24 are driven to supply the stored engine oil to the oil pan 15. It is possible.

  The load cell 26 detects the weight of the supply tank 25 and converts it into an electrical signal. The load cell 26 is subjected to a load of the replenishing tank 25 in which engine oil is stored. The load cell 26 is connected to the controller 50, and the detection value of the load cell 26 can be input to the controller 50.

  With such a configuration, in the continuous weigh scale 20, when the engine oil in the oil pan 15 is consumed, the replenishment pump 23 and the suction pump 24 are driven to drive the engine oil amount in the oil pan 15. Is controlled to be constant, and the weight of the replenishing tank 25 is detected by the load cell 26, whereby the amount of decrease in the engine oil stored in the oil pan 15 per unit time is measured.

  The pseudo engine oil consumption device 30 reduces (pseudo-consumes) the engine oil stored in the oil pan 15. The simulated engine oil consuming device 30 includes an electromagnetic switching valve 31, an automatic dropping device 32 as a dropping device, a container 35, and a high-accuracy scale 36 as a detector.

  The engine oil in the oil pan 15 is normally consumed with the operation of the engine 10, but the pseudo engine oil consumption device 30 automatically uses the engine oil in the oil pan 15 regardless of the operation of the engine 10. The liquid is forcibly consumed by being forcibly discharged to the outside of the oil pan 15 by the dropping device 32.

  The electromagnetic switching valve 31 is provided in the middle of a connecting pipe that connects the oil pan 15 and the automatic dripping device 32. The electromagnetic switching valve 31 is connected to the controller 50, and the controller 50 can control the opening / closing of the electromagnetic switching valve 31.

  The automatic dropping device 32 automatically drops the engine oil in the oil pan 15 to the outside of the oil pan 15 by a predetermined amount (set flow rate) per unit time. More specifically, in the automatic dropping device 32, the dropping engine oil is detected by a dropping sensor, and the pressure of the outlet side tube is adjusted by the electric clamp so that the flow rate passing through the outlet side tube becomes the set flow rate. It is adjusted.

  The container 35 temporarily stores the engine oil dripped by the automatic dripping device 32. The container 35 is placed on a high precision scale 36.

  The high-precision scale 36 measures the weight of the engine oil in the oil pan 15 dropped into the container 35 by the automatic dropping device 32. The high-accuracy scale 36 is a scale capable of measuring a weight up to a unit of 1 g or less. The high precision scale 36 is connected to the controller 50, and the measurement value of the high precision scale 36 can be input to the controller 50.

  The controller 50 compares the simulated engine oil consumption X that is pseudo-consumed by the simulated engine oil consumption device 30 with the engine oil consumption P measured by the continuous weigh scale 20 and measures the continuous weigh scale 20. It has a function to calculate an error. The controller 50 is connected to the load cell 26, the electromagnetic switching valve 31, and the high precision scale 36.

  The simulated engine oil consumption amount X consumed in a pseudo manner by the simulated engine oil consumption device 30 corresponds to the amount of engine oil dropped into the container 35 by the automatic dropping device 32. In other words, the pseudo engine oil consumption amount X consumed in a pseudo manner is equal to the engine oil amount taken out from the oil pan 15 to the outside by the automatic dripping device 32.

  Further, in the engine oil consumption measuring device 100, the simulated engine oil consumption X consumed by the simulated engine oil consuming device 30 by the continuous weigh scale 20, the simulated engine oil consuming device 30, and the controller 50, and the continuous weigh scale. A measurement error calculation system that calculates the measurement error of the continuous weigh scale 20 by comparing with the engine oil consumption P measured by the No. 20 is configured. It constitutes an engine oil consumption measurement system that measures the amount.

The engine oil consumption measuring step S1000 will be described with reference to FIG.
In FIG. 2, the engine oil consumption measuring step S1000 is represented by a flowchart.

  The engine oil consumption measuring step S1000 is an embodiment of the engine oil consumption measuring method performed by the engine oil consumption measuring device according to the present invention. In the engine oil consumption measuring step S1000, the measurement error of the continuous weigh scale 20 is calculated, the quality of the continuous weigh scale 20 is determined, and the engine oil is accurately determined by the continuous weigh scale 20 determined that the measured value is normal. This is a process of measuring consumption.

  The engine oil consumption measurement step S1000 includes error calculation steps S100 and S300, an engine oil consumption calculation step S200, and an engine oil consumption evaluation step S400.

  In the error calculation steps S100 and S300, the pseudo engine oil consumption X reduced by the pseudo engine oil consumption device 30 is compared with the engine oil consumption P measured by the continuous weigh scale 20, and the measurement of the continuous weigh scale 20 is performed. This is a step of calculating an error and determining whether the continuous weigh scale 20 is good or bad.

  The engine oil consumption calculation step S200 is a step of measuring the engine oil consumption using the continuous weigh scale 20 in which it is determined that there is no measurement error and the measurement value is normal in the error calculation step S100. Here, “there is no measurement error” means a state in which the measurement value is within a predetermined reference value determined in advance and there is no problem even if the measurement value is handled as a normal value.

  The engine oil consumption evaluation step S400 is a step of evaluating the engine oil consumption P calculated in the engine oil consumption calculation step S200 and storing data of the calculated engine oil consumption P in a database.

The error calculation step S100 will be described with reference to FIG.
In FIG. 3, the error calculation step S100 is represented by a flowchart.

  As described above, the error calculation step S100 compares the simulated engine oil consumption amount X consumed by the simulated engine oil consumption device 30 with the engine oil consumption amount P measured by the continuous weigh scale 20 to determine the continuous weight scale. This is a step of calculating 20 measurement errors and determining whether the continuous weighing scale 20 is good or bad.

  In the error calculation step S100, the replenishment pump 23 and the suction pump 24 are driven, and the engine oil stored in the oil pan 15 is controlled to be a constant amount.

  The controller 50 starts the warm-up operation of the engine 10 in step S110. When the engine 10 is warmed up, the engine oil in the oil pan 15 is heated to the same temperature as when the engine 10 is operating normally. The warm-up operation is a state in which the engine 10 is being driven with no load, and the engine oil is not consumed by the engine 10.

  In step S120, the controller 50 activates the automatic dropping device 32 at the set flow rate. By starting the automatic dripping device 32, the engine oil stored in the oil pan 15 is dripped into the container 35 and is consumed in a pseudo manner by a predetermined flow rate per unit time.

  In step S130, the controller 50 confirms whether or not each parameter indicating the operating state of the engine 10 that is warming up is within the reference range. At this time, if each parameter indicating the operating state of the engine 10 that is warming up is not within the reference range, after a predetermined time has elapsed, it is checked again whether each parameter is within the reference range. Shall.

  Each parameter includes the temperature of the engine oil, the temperature of the load cell 26, and the humidity in the continuous weigh scale 20. Note that the reference range of each parameter is set in the controller 50 in advance.

  The engine oil in the oil pan 15 is dropped into the container 35 by the automatic dripping device 32 and is consumed in a pseudo manner. However, the engine oil in the supply tank 25 is supplied to the oil pan 15 by the supply pump 23 and the suction pump 24. The engine oil in the oil pan 15 is held at a constant amount because it is replenished inside. Thereby, the engine oil in the replenishment tank 25 decreases.

  In step S140, the controller 50 calculates data of a plurality of engine oil consumptions P1... Pn from the reduction amount of engine oil in the replenishment tank 25 measured by the continuous weigh scale 20 per unit time.

  In the present embodiment, the least square expression y = Px + q (y is actual engine oil consumption, x is time series) of engine oil consumption P, which is consumption per unit time (for example, 1 hour) every minute. Ask for. In this case, the engine oil consumption P after 1 minute from the reference time is defined as the engine oil consumption P1, and the engine oil consumption P after n minutes is defined as the engine oil consumption Pn. Pn data is calculated.

  In step S150, the controller 50 confirms whether or not the variation of the plurality of engine oil consumptions P1... Pn is within the reference range. At this time, if the variation in the plurality of engine oil consumptions P1... Pn is within the reference range, it is determined that there is no problem, and the process proceeds to step S160. On the other hand, if the variation of the plurality of engine oil consumptions P1... Pn is not within the reference range, it is determined that there is a problem, and the process is repeated from step S130. Note that the reference range of variation is set in the controller 50 in advance.

  In step S160, the controller 50 calculates the average value of the plurality of engine oil consumptions P1,.

  In step S170, the controller 50 measures the amount of engine oil dropped from the automatic dripping device 32 and stored in the container 35 with the high-precision scale 36, and acquires the measured amount of engine oil. The controller 50 calculates a pseudo engine oil consumption amount X that is a dripping amount per unit time of the engine oil from the automatic dripping device 32 based on the acquired measured value of the engine oil amount.

  In step S180, the controller 50 calculates the difference between the pseudo engine oil consumption X and the engine oil consumption P as a measurement error of the engine oil consumption P measured by the continuous weigh scale 20. In this case, the pseudo engine oil consumption X measured by the high-accuracy scale 36 is handled as a true value with no measurement error.

  Further, it is confirmed whether or not the difference between the pseudo engine oil consumption X and the engine oil consumption P (measurement error of the engine oil consumption P by the continuous weigh scale 20) is within the reference range. Note that the reference range of the difference between the pseudo engine oil consumption amount X and the engine oil consumption amount P is set in the controller 50 in advance.

  At this time, if the difference between the pseudo engine oil consumption X and the engine oil consumption P is within the reference range, it is determined that the continuous weigh scale 20 is good and the measured value of the continuous weigh scale 20 is normal. Then, the process proceeds to step S190. On the other hand, if the difference between the pseudo engine oil consumption X and the engine oil consumption P is not within the reference range, it is determined that the continuous weigh scale 20 is negative and the measured value of the continuous weigh scale 20 is not normal. The process proceeds to step S500.

  In step S190, the controller 50 stops the warm-up operation of the engine 10.

  In step S500, the operator investigates the cause that the difference between the pseudo engine oil consumption amount X and the engine oil consumption amount P is not within the reference range.

The engine oil consumption calculation step S200 will be described with reference to FIG.
In FIG. 4, the engine oil consumption calculation step S200 is represented by a flowchart.

  In the engine oil consumption calculation step S200, as described above, the engine oil consumption by the engine 10 performing normal operation using the continuous weigh scale 20 in which the measured value is determined to be normal in the error calculation step S100. This is a process of actually measuring.

  In the engine oil consumption calculation step S200, it is assumed that the replenishment pump 23 and the suction pump 24 are respectively driven and the engine oil stored in the oil pan 15 is controlled to be a constant amount.

  In step S210, the controller 50 starts normal operation of the engine 10. Thereby, the engine oil in the oil pan 15 is consumed by the engine 10.

  In step S220, the controller 50 confirms whether or not each parameter indicating the operating state of the engine 10 operating normally is within the reference range. Here, each parameter includes the engine oil temperature, the temperature of the load cell 26, and the humidity in the continuous weigh scale 20. Note that the reference range of each parameter is set in the controller 50 in advance. At this time, when each parameter indicating the operating state of the engine 10 that is operating normally is not within the reference range, it is reconfirmed whether each parameter is within the reference range after a predetermined time has elapsed. And

  In step S230, the controller 50 calculates data of a plurality of engine oil consumptions P1... Pn from the reduction amount of the engine oil in the replenishment tank 25 measured by the continuous weigh scale 20 per unit time.

  In the present embodiment, the least square expression y = Px + q (y is actual engine oil consumption, x is time series) of engine oil consumption P, which is consumption per unit time (for example, 1 hour) every minute. Ask for. In this case, the engine oil consumption P after 1 minute from the reference time is defined as the engine oil consumption P1, and the engine oil consumption P after n minutes is defined as the engine oil consumption Pn. Pn data is calculated.

  In step S240, the controller 50 checks whether or not the variation of the plurality of engine oil consumptions P1... Pn is within the reference range. At this time, if the variation of the plurality of engine oil consumptions P1... Pn is within the reference range, it is determined that there is no problem, and the process proceeds to step S250. On the other hand, if the variation of the plurality of engine oil consumptions P1... Pn is not within the reference range, it is determined that there is a problem, and the process is repeated from step S220. Note that the reference range of variation is set in the controller 50 in advance.

  In step S250, the controller 50 calculates an average value of the plurality of engine oil consumptions P1,... Pn as the engine oil consumption P.

  In step S260, the controller 50 stops normal operation of the engine 10.

The error calculation step S300 will be described.
The error calculation step S300 compares the simulated engine oil consumption X reduced by the simulated engine oil consumption device 30 with the engine oil consumption P measured by the continuous weigh scale 20, and calculates the measurement error of the continuous weigh scale 20. It is a process of calculating. Since the error calculation step S300 is the same as the error calculation step S100, detailed description thereof is omitted.

The engine oil consumption evaluation step S400 will be described.
In the engine oil consumption evaluation step S400, as described above, the engine oil consumption P calculated in the engine oil consumption calculation step S200 is evaluated, and data of the calculated engine oil consumption P is stored in a database. It is a process of storing.

  The calculated engine oil consumption P is evaluated by comparing the calculated engine oil consumption P with a preset standard value, for example. In addition, data of the evaluated engine oil consumption P, evaluation results, and the like are stored in a database.

The effects of the engine oil consumption measuring device 100 and the engine oil consumption measuring step S1000 will be described.
According to the engine oil consumption measuring device 100 and the engine oil consumption measuring step S1000, it is possible to calculate a measurement error of the continuous weigh scale 20 that measures the consumption of engine oil. Further, the engine oil consumption P can be accurately measured using the continuous weigh scale 20 in which the measurement error is calculated.

  Further, in the engine oil consumption measurement step S1000, the error calculation step S100 is performed before the engine oil consumption calculation step S200 is performed, so that the measurement error of the continuous weigh scale 20 is calculated in advance. When an abnormality occurs in the measured value of the oil consumption P, it is possible to easily verify whether the cause of the abnormality is on the continuous weigh scale 20 side or the engine 10 side. It can be done in a short time and properly.

  Further, in the engine oil consumption measurement step S1000, the error calculation step S300 is performed after the engine oil consumption calculation step S200, and it is confirmed again that the measured value of the continuous weigh scale 20 is normal. It is possible to confirm the accuracy of the measured value of the engine oil consumption P by the engine 10 measured in the consumption calculation step S200.

DESCRIPTION OF SYMBOLS 10 Engine 15 Oil pan 20 Continuous weighing scale 25 Replenishment tank 26 Load cell 30 Pseudo engine oil consumption apparatus 32 Automatic dripping apparatus 36 High precision scale (detector)
50 controller (calculation unit)
100 Engine oil consumption measuring device

Claims (5)

An engine oil consumption measuring device for measuring consumption of engine oil consumed by an engine,
A continuous weigh scale for measuring the weight of a supply tank in which engine oil is stored and the stored engine oil can be supplied to an oil pan included in the engine;
A detector for dropping engine oil from the oil pan and detecting a dropping amount of the dropped engine oil;
A calculation unit that compares a detection value of the detector with a measurement value of the continuous weigh scale and calculates a measurement error of the continuous weight scale;
With
Measuring the amount of engine oil consumed by the engine based on the calculated value of the calculating unit and the measured value of the continuous weigh scale;
Measuring device for engine oil consumption. An engine oil consumption measuring device according to claim 1,
The detector, the continuous weight scale, and the calculation unit constitute a measurement error calculation system that calculates a measurement error of the continuous weight scale,
An engine oil consumption measuring system that measures engine oil consumption by the engine is configured by the continuous weigh scale and the calculation unit.
Measuring device for engine oil consumption. The engine oil consumption measuring device according to claim 1 or 2,
The dropped engine oil is dropped by a dropping device that drops a predetermined amount of engine oil stored in the oil pan per unit time,
The continuous weigh scale measures the weight per unit time of the replenishing tank by a load cell.
Measuring device for engine oil consumption. An engine oil consumption measuring method for measuring consumption of engine oil consumed by an engine using the continuous weight meter for measuring a reduction amount of engine oil stored in an engine oil pan,
While simulating the engine oil stored in the oil pan of the engine, the amount of engine oil consumed quasi is measured,
The continuous weight scale measures the amount of engine oil stored in the oil pan,
Compare the measured value of the engine oil amount that is artificially consumed with the measured value of the decrease amount of the engine oil stored in the oil pan, with the measured value of the engine oil amount that is artificially consumed as a true value. And calculating the measurement error of the continuous weigh scale,
How to measure engine oil consumption. A method for measuring engine oil consumption according to claim 4,
A measurement error calculating step of calculating a measurement error of the continuous weigh scale and determining whether the continuous weight scale is good or bad;
An engine oil consumption measuring step of measuring engine oil consumption by the engine using the continuous weight meter determined to be good in the measurement error calculating step;
How to measure engine oil consumption.

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