JPS5963522A - Measuring device for engine oil consumption - Google Patents

Abstract

PURPOSE:To measure the consumption of engine oil momentarily by supplying the engine oil from a pump to an external oil tank where the oil surface is at the same height so that the oil level in an oil pan is held constant. CONSTITUTION:Engine oil spaces 3 and 9 communicate with each other through a siphon 10 and are equal in oil surface level, and the oil level in the external oil tank 8 drops as engine oil is consumed by a main engine body 2. An ON signal is sent from a photoelectric element 14 to an electronic control part 15 by light from a light source 13 to operate a reversible motor 23, and a plunger 21 is pressed into an oil chamber 20. The coil is supplied to the engine oil spaces 3 and 9 through the siphon 10 and the oil level in the external oil tank 8 rises up to the original height. The movement extent of the plunger 21 is detected by a magnet scale 27 and displayed on an engine oil consumption display device 28.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for continuously measuring the amount of engine oil consumed during engine bench operation of an automobile engine.

In general measurement of engine oil consumption during engine bench operation, the weight or volume of oil before and after a combustion test is measured with a measuring device, and the amount is determined from the difference. This type of measurement is time-consuming and difficult, as it is not possible to precisely drain the engine oil from the oil pan.
Errors tend to occur, and furthermore, it is difficult to measure engine oil consumption from moment to moment during engine operation.

Therefore, the present applicant provided a measuring device capable of continuously and highly accurately measuring engine oil consumption in the earlier Japanese Patent Application No. 124420/1982. 17 In order to circulate engine oil between the oil pan and the external oil tank and reproduce the oil level in the external oil tank at the same height as the oil level in the oil pan, the external oil tank is The temperature of the oil tank becomes high, making it extremely difficult to handle the external oil tank.

SUMMARY OF THE INVENTION An object of the present invention is to provide an engine oil consumption measuring device that can continuously measure accurate engine oil consumption without introducing high-temperature engine oil from an oil pan to the outside. ' To achieve this objective, the engine oil consumption measuring device of the present invention has an external oil tank provided outside the engine, an engine oil space in the oil pan at the bottom of the engine body, and an engine oil space in the external oil tank. A siphon that communicates with each other, a pump that supplies engine oil to the external oil tank so that the oil level in the engine oil space in the external oil tank is maintained constant, and the amount of movement of the moving members of this pump is detected. Equipped with a detector. The height of the oil level in the engine oil space in the external oil tank is made equal to the oil level in the engine oil space in the geo-oil pan due to the siphon. As engine oil is consumed in the engine, the oil level in the oil pan and external oil tank tends to decrease; Engine oil is supplied from the pump to the external oil tank so that the engine oil is maintained constant. As a result, the amount of engine oil consumed appears as the amount of movement of the moving member of the pump, so the amount of engine oil consumed from moment to moment can be measured from this amount of movement. In the present invention, the engine oil space in the external oil tank only communicates with the engine oil space in the id oil pan through the siphon, and high temperature engine oil is not introduced from the oil pan to the external oil tank, so measurement is possible. The safety of the device is improved and it becomes possible to use equipment with low heat resistance.

In the present invention, instead of the movement amount detector, a moving means for vertically moving the external oil tank so that the absolute height of the oil level in the engine oil space in the external oil tank is maintained constant; A detector is provided to detect the amount of movement of the external oil tank. In this way, as the engine oil is consumed, the external oil tank is moved upward by the moving means, and the consumed engine oil is supplied from the external oil tank to the oil pan. Therefore, it is possible to measure the engine oil consumption from moment to moment based on the amount of vertical movement of the external oil tank.

Furthermore, in the present invention, a detector that detects the weight of oil in the external oil tank is provided instead of the detector that detects the amount of movement of the external oil tank. Engine oil is supplied from the external oil tank to the oil pan as the external oil tank moves upward as engine oil is consumed. The amount of engine oil reduction in the external oil tank is determined not only by the amount of vertical movement of the external oil tank.
It also appears as a change in the oil weight in the external oil tank. Therefore, the amount of engine oil consumed can be measured from this change in oil weight.

While the engine is running, blow-by from the combustion chamber to the oil pan 7.
The gas leaks and increases the pressure inside the oil pan. In a preferred embodiment of the present invention, the gas space of the oil pan and the gas space of the external oil tank are communicated with each other to equalize the air pressures of both gas spaces. As a result, measurement of engine oil consumption is prevented from being influenced by blow-by gas.

The present invention will be described in detail with reference to the drawings.

In the embodiment shown in FIG. 1, an oil pan 1 is attached to the lower part of an engine body 2 and has an engine oil space 3. The insertion tubes 4 and 5 are bundled and inserted downward from an insertion hole in the engine body 2. The lower end of the insertion tube 4 is located within the gas space within the oil pan 1, and the lower end of the insertion tube 5 is located within the engine oil space 3. The external oil tank 8 has an engine oil space 9, and this engine oil space 9 communicates with the engine oil space 3 of the oil pan 1 from an on-off valve 11 at the bottom of the external oil tank 8 via a siphon 10. The aforementioned insertion tube 5 is the siphon 1
0 on the oil pan side. External oil tank 8
The gas space of
The gas space inside and the gas space inside the external oil tank 8 are maintained at the same pressure. A light source 1 consisting of, for example, a light emitting diode
3 and a photoelectric element 1 consisting of, for example, a phototransistor.
4 are provided facing each other on both sides of the external oil tank 8 at a predetermined height, and detect whether the oil level height in the engine oil space 9 is at a predetermined value.

The external oil tank 8 is made of a translucent material at least at the level of the light source 13 and photoelectric element 14 . The electronic control unit 15 sends power to the light source 13 and the photoelectric element 14, and receives a detection signal from the photoelectric element 14. The oil chamber 20 of the plunger pump 19 is connected to a port on the oil pan 1 side of the on-off valve 11, and thus to the middle of the siphon 10. The plunger 21 of the plunger pump 19 is connected to a rack 22, and a reversible motor 23 controls the rotation of a pinion 24 in response to a control signal from the electronic control unit 15, thereby controlling the rotation of a pinion 24 that engages with the rack 24. The plunger 21 is moved via 22.

Magnescale (product name) 27 uses a rack 22 for the displacement part.
is connected to the curved end of the plunger 21 to detect the amount of movement of the plunger 21,
The detected value is displayed on the display 28.

The on-off valve 11 is closed, the plunger 21 of the plunger pump 19 is pushed toward the oil chamber 20, the engine oil in the oil chamber 2o flows into the siphon 1o, and the air in the siphon 10 is discharged from the lower end of the insertion pipe 5. Next, open the on-off valve 11 and adjust the plunger pump 19 so that the oil level in the external oil tank 8 is at the same level as the light source 13 and the photoelectric element 14.
operate the plunger 21 of.

Since the engine oil spaces 3 and 9 communicate with each other through the siphon 1o, the heights of the oil levels in both the engine oil spaces 3 and 9 are equal.

When the oil level in the external oil tank 8 decreases as the engine oil in the engine body 2 is consumed, the light from the light source 13 reaches the photoelectric element 14 without being blocked by the engine oil in the external oil tank 8. A signal is sent to the electronic control unit 15 from the electronic control unit 15. As a result, the reversible motor 23 is activated, and the plunger 21 is pushed into the oil chamber 20. Engine oil in oil chamber 20 is Siphon 1
0 to the engine oil spaces 3 and 9, the oil level in the external oil tank 8 rises.

When the oil level in the external oil tank 8 reaches its original height again,
The light from the light source 13 is blocked by the engine oil in the external oil tank 8, and a photoelectric element 14 sends an off signal to the electronic control section 15. As a result, the reversible motor 23 is stopped, and the movement of the plunger 21 is stopped. The plunger 21 is pushed toward the oil chamber 20 in relation to the amount of engine oil consumed, and the amount of movement of the plunger 21 is determined by the magnescale 27.
Since it is detected by the engine oil consumption indicator 2
8. Since the high-temperature engine oil in the oil pan 1 does not leak out via the siphon 10, the safety of the measurement work is increased and it is possible to use instruments with low heat resistance. Further, as the engine is operated, the prove-by gas flows out from the combustion chamber into the oil pan 1, and the air pressure inside the oil pan 1 increases. The oil levels in the engine oil spaces 3 and 9 are maintained at the same level despite the blow-by gas.

FIG. 2 shows another embodiment of the invention.

To explain only the parts that are different from FIG. 1, the plunger 21 of the plunger pump 19 is separated from the rack 22, and the plunger 21 of the plunger pump 19 is separated from the rack 22. Used only for initial settings. The rack 27 extends vertically and has an upper end coupled to the lower end of the external oil tank 8 .

In order to allow vertical movement of the external oil tank 8, the siphon 10 and the communication tube 12 are partially constructed of flexible tubes. When the oil level in the external oil tank 8 decreases as the engine oil is consumed, the light from the light source 13 reaches the photoelectric element 14, and the photoelectric element 14 generates an on signal. As a result, the reversible motor 23 is activated to move the external oil tank 8 in the vertical direction. When the absolute height of the oil level in the external oil tank 8 reaches the height of the light #13 and the photoelectric element 14, the light from the light source 13 is blocked by the engine mail.
Photoelectric element 14 generates an off signal 17, reversible motor 23
is stopped, and the movement of the external oil tank 8 in the vertical direction is stopped. Therefore, the amount of movement of the external oil tank 8 is a function of the amount of engine oil consumed, and the amount of engine oil consumed is displayed on the display 28.

FIG. 3 shows another embodiment of the invention. To explain only the differences from FIG. 2, the on-off valve 11 is provided on the lower side wall of the external oil tank 8. The external oil tank 8 has a weight scale 33
The rack 22, which is placed on a loading platform and extends in the vertical direction, is connected at its upper end to the lower end of a weight scale 33. rack 2
2 moves the external oil tank 8 and the weight scale 33 at the same time.

When the oil level in the external oil tank 8 decreases as the engine oil is consumed, the photoelectric element 14 generates an on signal, and the reversible motor 23 moves the external oil tank 8 and the weighing scale 33.
move upward. When the oil level of the external oil tank 8 reaches the height of the light source 13 and the photoelectric element 14, the photoelectric element 14
generates an off signal, and the reversible motor 23 stops. By moving the external oil tank 8 vertically upward, engine oil is sent from the external oil tank 8 to the oil pan 1 via the siphon 10, and the absolute height of the oil level in the external oil tank 80 is maintained constant. oil tank 8
The decrease in the weight of engine oil becomes equal to the weight of engine oil consumed in the engine body 2. In this way, the amount of engine oil consumed can be measured from the decrease in weight on the weight scale 33.

[Brief explanation of drawings]

FIG. 1, FIG. 2, and FIG. 3 are block diagrams of embodiments of the present invention, respectively. 1... Oil pan, 2... Engine body, '3.9
...Engine oil space, 10...Siphon, 1
3... Light source, 14... Photoelectric element, 19... Plunger pump, 22... Rack, 23... Reversible motor, 24... Binion, 27... Magnescale, 3
3. Weight scale. Patent Applicant: Toyota Motor Corporation Representative, Patent Attorney: Osamu Naka: Part 1-1, Figure 2-12

Claims (1)

[Claims] 1. An external oil tank provided outside the engine, a siphon that communicates the engine oil space in the oil pan at the bottom of the engine body with the engine oil space in the external oil tank, and engine oil in the external oil tank. A pump for supplying engine oil to an external oil tank so as to maintain a constant oil level in the space, and a detector for detecting the amount of movement of a moving member of the pump, Engine oil consumption measuring device. 2. An external oil tank provided outside the engine, a siphon that connects the engine oil space in the oil pan at the bottom of the engine body with the engine oil space in the external oil tank, and Engine oil consumption measurement, characterized by comprising a moving means for vertically moving an external oil tank so that the absolute height is maintained constant, and a detector for detecting the amount of movement of the external oil tank. Device. 3 External oil tank installed outside the engine,
A siphon that connects the engine oil space in the oil pan at the bottom of the engine body with the engine oil space in the external oil tank, so that the absolute height of the oil level in the engine oil space in the external oil tank is maintained constant. An engine oil consumption measurement device comprising a moving means for vertically moving an external oil tank and a detector for detecting the weight of oil in the external oil tank.