KR100690241B1 - Apparatus and method for detecting condition of engine oil - Google Patents

Abstract

An apparatus for detecting a state of an engine oil and a method therefor are provided to improve durability of an engine and reduce repair costs by change replenishand supplement of the engine oil at a correct time. An apparatus for detecting a state of an engine oil includes a power supply unit(10), a sensor array module unit(100), a signal comparison determination module unit(200), and a display unit(400). The power supply unit converts power supplied from a battery for a vehicle to wanted power and supplies the converted power. A detection sensor unit(120) has a plurality of detection sensors which detect characteristics of the engine oil and are made of a carbon nano-tube. A driving unit(110) drives an operation of the detection sensor unit when the power is supplied by the power supply unit. A minute signal amplifying unit(130) amplifies a minute signal detected in the detection sensor unit. An oil state determination unit(240) compares and determines a deterioration state of the engine oil for the detection signal transmitted from the sensor array module unit with a predetermined reference value. An oil remaining quantity determining unit(220) determines a level of the engine oil according to the detection sensor which is operated according to the level of the oil of the plurality of detection sensors. The display unit displays the signal outputted in the signal comparison determination module unit as oil excess, supplement alarm, or oil exchange time information through a character or a predetermined method.

Description

Apparatus and method for detecting condition of engine oil}

1 is a perspective view of an electrical conductivity detection sensor using carbon nanotubes in a sensor array module according to the present invention.

2 is a cross-sectional view taken along line II of FIG. 1.

3 is a perspective view of an electrical conductivity detection sensor using carbon nanotubes in the sensor array module according to the present invention.

4 is a cross-sectional view taken along line II-II of FIG.

5 is a schematic structural block diagram of an engine oil condition detection apparatus for a vehicle according to the present invention.

6 is a schematic view of a sensor unit of another engine oil state detection apparatus for a vehicle according to the present invention.

7 is a flow diagram of one embodiment for performing engine oil condition detection for an automobile in accordance with the present invention.

<Description of the symbols for the main parts of the drawings>

10: power supply unit 100: sensor array module

111: substrate 115: circuit wiring

120: sensor 120a, 120b: sensor

200: signal comparison judgment module 220: oil remaining judgment

240: oil state judging unit 300: starting ignition device

400: display unit

The present invention relates to an engine oil state detection apparatus and a detection method of an automobile using carbon nanotubes, and more particularly, to detect an oil state and an oil level of engine oil through a sensor using carbon nanotubes. The present invention relates to a vehicle oil state detection apparatus and method using a carbon nanotube indicating the replenishment time and replacement time.

In general, the engine oil injected into the vehicle is lubricated to maintain smooth kinetic force in the reciprocating motion of the piston performed by the explosion of the engine, and the airtight action to prevent the leakage of pressure and foreign matter in the cylinder to absorb the foreign matter in the cylinder. Anti-rust action to prevent breakage and cooling action to absorb heat of the cylinder and piston.

As the engine oil having the above-mentioned function is used for a long time, the amount of oil injected by combustion in the engine is reduced, and the oil, viscosity, acid value and sludge amount of the oil are changed due to deterioration.

Therefore, in the case of engine oil, periodic replenishment or replacement is required, and if the replenishment or replacement time is missed or the vehicle continues to run in such a state, the durability of each lubrication part in the engine is reduced, thereby reducing the life span and excessive cost of repair It is caused by excessive fuel consumption and increase of exhaust gas caused by engine power degradation, which causes environmental problems.

Therefore, it is necessary to periodically check the engine oil and determine the time of replenishment or replacement according to the state. To this end, the driver replenishes the engine oil through the mileage of the integrating totalizer in the cluster mounted on the instrument panel. Determining whether to replace the engine oil by determining the replacement time or by visually observing the dip stick installed in the engine room by measuring the amount, viscosity, and color of the engine oil. Judging.

The conventional method of determining the refill / replacement timing of the engine oil as described above has a disadvantage in that the driver directly calculates the mileage and has to check the deterioration degree of the oil directly.

In addition, since the determination of the degree of deterioration of the engine oil is performed by the driver's supervision, the lack of accuracy causes waste and environmental pollution due to unnecessary replacement of the engine oil, and too late replacement causes wear of each lubrication part in the engine. The disadvantage is that the durability is lowered.

In addition, since the degree of deterioration of the engine oil varies greatly depending on the driving habits of the driver, there is a disadvantage in that it is difficult to determine the replacement time due to a difference from the replacement time indicated in the maintenance guide.

On the other hand, even when replenishing the engine oil in accordance with the level of the engine oil, the engine oil is injected into the engine in excess of the appropriate amount causes output degradation and performance degradation.

Therefore, there is a need for an apparatus and method capable of always monitoring a gauge level indicating the amount of engine oil independent of the state of the engine oil.

The present invention has been devised to solve the above problems, the object of which is to determine the oil state by detecting a change in the physical properties such as dielectric constant change or electrical conductivity of the engine oil for automobiles using carbon nanotube sensor, An object of the present invention is to provide an apparatus and method for detecting an engine oil state of a vehicle using carbon nanotubes, which can measure the amount of oil and suggest when to replenish or replace the engine oil.

Engine oil state detection apparatus for a vehicle according to the present invention for realizing the above object, a power supply for converting the power supplied from the vehicle battery to the required power supply, a plurality of carbon nanotubes sensing the physical properties of the engine oil A sensing sensor unit including a sensing sensor and a driving unit for driving and controlling the operation of the sensing sensor when power is supplied from the power supply unit and a small signal amplifying unit for amplifying the fine signal detected by the sensing sensor unit; A sensor array module unit, an oil state determination unit for determining the deterioration state of the engine oil with respect to the detection signal transmitted from the sensor array module unit and a set reference value, and a detection operated according to the oil level of the plurality of detection sensors. A new unit including an oil level determining unit for determining the engine oil level according to the sensor Comparative determining module unit and a display unit for displaying the comparison signal determined in the module unit exceeds the output signal oil, replacement warning or oil change time information as a character or a predetermined method.

In addition, in the vehicle engine oil state detection apparatus according to the present invention, each of the detection sensor of the sensor module unit, a circuit connection terminal for receiving power and receiving a signal, connected to the circuit connection terminal and changes the electrical conductivity It characterized in that it comprises a sensing film formed of carbon nanotubes for sensing and the electrode, the substrate on which the sensing film is mounted.

In addition, in the vehicle engine oil state detection apparatus according to the present invention, each of the sensing sensors of the sensor module unit, the sensing film formed of a carbon nanotube connected to the electrode, the electrode is connected to the electrode to sense the change in dielectric constant And a dielectric constant detection sensor including the electrode and the substrate on which the sensing film is mounted.

In addition, in the vehicle engine oil state detection apparatus according to the present invention, the arrangement of the sensor sensors is characterized in that the plurality of sensors are positioned as the oil level is lowered.

In addition, in the automotive engine oil state detection apparatus according to the present invention, the detection sensors of the detection sensor unit is characterized in that the arrangement in the pyramid shape.

In addition, in the automotive engine oil state detection apparatus according to the present invention, the sensor array module and the signal comparison determination module is mounted on one printed circuit board, characterized in that manufactured in one unit.

In the apparatus for detecting an engine oil state of an automobile according to the present invention, the oil state determination unit may receive a signal from detection sensors operated according to a change in oil level, calculate an average value, and determine a deterioration state of the engine oil. It is.

Further, in the vehicle engine oil state detection apparatus according to the present invention, in the arrangement of the detection sensor of the sensor array module is characterized in that the highest sensor is located above the appropriate oil level.

In the vehicle engine oil condition detection apparatus according to the present invention, the lowest detection sensor in the arrangement of the detection sensor of the sensor array module is characterized in that located at the lowest of the appropriate oil level.

In addition, in the vehicle engine oil state detection apparatus according to the present invention, the oil level determination portion of the signal comparison determination module is connected to the start ignition device is operated so that the start is turned off when the engine oil level indicates the lowest level It is characterized by.

On the other hand, the engine oil detection method of a vehicle according to the present invention, the step of supplying power to each load by the power-on supplied from the vehicle battery, when the initial oil amount of the engine oil of the vehicle to measure the oil level or more Marking for oil overfill or oil replenishment, starting the engine and circulating the oil to start a real-time check of the oil condition, measuring the dielectric constant or electrical conductivity of the engine oil in a sensor array module installed in the engine oil chamber When the reference value is set and the detection sensor of the sensor array module detects a deterioration state of the engine oil to detect a change in dielectric constant or electrical conductivity, the oil state determination unit compares the set reference value with normal to continue the periodic measurement and the oil If an abnormality occurs, mark the oil change It should.

In addition, in the engine oil detection method of the vehicle according to the present invention, the step of operating so that the starting is turned off when the level of the engine oil indicates the lowest level when the initial oil amount of the engine oil of the vehicle is measured or more It is characterized in that it further comprises.

In addition, in the engine oil detection method of the vehicle according to the present invention, the measurement is terminated when there is no abnormality in the step of measuring the initial oil amount of the engine oil of the vehicle, the measurement result is the value while the start is turned on Is stored in the storage device to maintain the measurement display.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic perspective view for explaining a driving mechanism of the electric conductivity detection sensor using carbon nanotubes in the sensor array module according to the present invention, and FIG. 2 is a cross-sectional view taken along line I-I of FIG.

1 and 2, an electrical conductivity detection sensor using carbon nanotubes according to the present invention is an electrode 13 to which power is applied and a carbon nanotube connected between the electrodes 13 and sensing a change in electrical conductivity. And a substrate 11 on which the sensing film 12, the sensing film 12, and the electrode 13 are mounted.

Here, the substrate 11 of the sensor is made of glass or silicon.

Carbon nanotubes deposited and grown on the substrate 11 or formed by a screen printing method are connected to the sensing film 12 as a bridge between the electrodes 13.

In addition, the electrode 13 is connected to the power supply by the lead wire 14, the lead wire 14 is attached to the electrode 13 to make the entire closed circuit.

The electrode 13 may be made of indium tin oxide (ITO) or a metal, and may be formed of carbon nanotubes in the same manner as the sensing layer 12.

The carbon nanotubes connected as the sensing layer 12 may be deposited using a semiconductor process, a screen printing technique, or a direct growth method.

The carbon nanotubes have sp ² bonds in which graphite is rounded, so that the surface area per unit area is very wide, so that the carbon nanotubes have excellent adsorption capacity for gas molecules or ions.

In addition, carbon nanotubes have the characteristics of an electrical metal or a semiconductor, and the electrical conductivity is changed according to the adsorption of gas molecules or ions.

Therefore, when the sensing film 12 is composed of carbon nanotubes, when a DC voltage is applied, the electrical resistance changes according to the amount of change of ions adsorbed on the carbon nanotubes, thereby detecting the change in electrical conductivity. You can do it.

On the other hand, as another embodiment of the carbon nanotube sensor according to the present invention it is also possible to configure a sensor for detecting a change in dielectric constant using the carbon nanotube.

3 is a schematic diagram of a dielectric constant change detection sensor using carbon nanotubes in a sensor array module according to the present invention, and FIG. 4 is a cross-sectional view taken along line II-II of FIG.

The dielectric constant detection sensor includes an electrode 23 to which power is applied, a sensing film 22 formed of carbon nanotubes connected to the electrode and sensing a change in dielectric constant, and the electrode 23 and the sensing film 22. It includes a substrate 21 for mounting.

Referring to FIG. 4, in the permittivity detection sensor, carbon nanotubes are deposited and screen printed on the electrode 23 made of metal or ITO, but the electrode 23 may be formed of carbon nanotubes. .

The carbon nanotubes functioning as the sensing film 22 detect a change in the dielectric constant by causing a change in capacitance according to a change amount of ions adsorbed on the carbon nanotubes when a voltage is applied.

In addition, referring to FIG. 3, it is more preferable that the branches of the electrode 22 are branched in the form of a silver comb pattern in the permittivity change detection sensor. In this case, the carbon nanotubes functioning as the sensing film 22 may be It is because the measurement sensitivity can be greatly improved because the surface area of the capacitive measuring electrode is increased because it is deposited on the electrode 22.

In the case of FIG. 3, a sensing film may be formed by screen printing carbon nanotubes on a base electrode of a comb electrode type using a photolithography process or by using a direct growth method.

When the screen printing method is used to measure the dielectric constant change in the sensor, the width of the comb electrode is 100 μm or less, the electrode gap is 100 μm or less, and in the direct growth method, the distance between the electrodes is preferably 50 μm or less.

 In addition, the carbon nanotubes used in the sensing membranes 12 and 22 of the sensor have a small size and ion adsorption and storage function, and have a large surface area per unit area, so that the sensitivity is high, the response speed is high, and the physical and chemical durability is excellent. Has the advantage.

In addition, the detection sensor using the carbon nanotubes as the sensing films 12 and 22 forms a large number of electrodes in a small area by using micromachining technology to manufacture a high-sensitivity sensor, and can make the sensor standard constant.

Now, a description will be given of a vehicle engine oil state detection device and detection method using a carbon nanotube sensor according to the present invention.

5 is a schematic structural block diagram of an engine oil condition detection apparatus for a vehicle according to the present invention.

Referring to FIG. 5, an apparatus for detecting an engine oil state of a vehicle according to the present invention includes a power supply unit 10 for converting power supplied from a battery into a required power and supplying power to a power source when the power is on, and detecting physical properties of engine oil. And a sensor driving unit 120 including a plurality of sensing sensors made of carbon nanotubes, and a sensor driving unit for driving and controlling the operation of the sensing sensor unit 120 when power is supplied from the power supply unit 10 to start operation. A sensor array module unit 100 including a small signal amplification unit 130 for amplifying the micro signal detected by the sensor sensor unit 120 and the detection signal transmitted from the sensor array module unit 100. Determining the level of the engine oil according to the oil state determination unit 240 for comparing the deterioration state of the engine oil with a set reference value and the detection sensor operated according to the oil level of the plurality of detection sensors. Signal comparison determination module unit 200 including the remaining oil determination unit 230, and the signal output from the signal comparison determination module unit 200 to display as a letter or a predetermined method as the oil replacement time or oil replenishment time information The display unit 400 is included.

The power supply unit 10 converts the DC 12V power supplied from the battery at the time of power-on of the vehicle into the required power required by each load.

The sensing sensor is a micro sensor, which is installed in the engine oil chamber and measures the change in dielectric constant or electrical conductivity of the engine oil which varies with degradation in the engine oil chamber, and outputs a fine signal thereto.

First, the conductivity change sensor using carbon nanotubes as a sensing material measures the conductivity of an initial reference value by applying a DC voltage to a new oil contained in an engine chamber, and then internal composition of the engine oil according to the use time of the engine oil. As the acidity of is changed and the degree of ion adsorption to the carbon nanotubes is increased, the resistance or electrical conductivity is changed.

The electric conductivity change detection sensor using the carbon nanotubes as a sensing material determines the deterioration state of the engine oil by comparing the previously measured reference value through the change of the resistance value and instructs the engine oil replacement time.

In addition, the dielectric change detection sensor using carbon nanotubes as a sensing electrode is applied to the AC voltage to determine the change in the capacitance value according to the change in the dielectric constant of the engine oil compared to the initial reference value to determine the deterioration state of the engine oil It will indicate when to change oil.

In the apparatus for detecting an engine oil change time for an automobile according to the present invention, the small signal amplifying unit 130 of the sensor array module 100 sets a fine output of a sensing sensor using carbon nanotubes as a sensing film. Amplify to the level of the signal transfer to the comparison judgment module 200.

The oil remaining amount determination unit 230 is a microprocessor, and operates when the power is turned on before the initial start-up, and detects a signal of each part of the sensor array module 100.

This is because it is difficult to accurately determine the water level because the oil is sprayed when the engine is started. If the oil level is normal, "Normal" is indicated by a letter or symbol, and when there is an error, it corresponds to "Over" or "Supplement". A letter or symbol is displayed, and this indication includes the step of continuing to the first measurement display even when starting, and proceeding to the next step if it is normal.

In the measurement of the level, the level of oil is measured through the presence or absence of a signal generated from the sensor at a designated position according to the level of the oil or comparison of normal data.

 In other words, if a signal occurs above the level (high), it will warn that the oil is exceeded, and if there is no signal in the level low sensor array, it will warn of a lack of oil.

Similarly, when a signal is generated in the intermediate sensor array, the oil level can be determined by indicating that the oil level is less than that of the predetermined upper sensor array and represents more oil level than the signal generating array.

After the measurement of the oil level before starting, the measurement is terminated if there is no abnormality, and the value is stored in the storage device while the starting is on, and the measurement is made again at the next starting.

The oil state determination unit 240 is a microprocessor, and determines the degree of deterioration of the engine oil by comparing the dielectric constant or electrical conductivity of the detected engine oil with a set reference value, the engine oil when the degree of deterioration to be compared exceeds the set reference value It is determined that the exchange time is and the information on it is output.

Here, the engine oil state detection apparatus for an automobile according to the present invention includes the power supply unit 10, the sensor driver 100, the sensor array module 100, and the signal comparison determination module 200 in one printed circuit board (PCB). It can also be installed in a single unit.

In addition, the display unit 400 is composed of LED, lamp or LCD display means in the cluster, the information on the oil replenishment / excess and replacement time applied from the signal comparison determination module 200 by text or a predetermined method Mark and notify the driver.

On the other hand, the engine oil state detection apparatus of the vehicle according to the present invention when the start ignition device 300 is connected to the oil level determination unit 220 of the signal comparison determination module 200 to indicate the level of the engine oil lowest level There is a warning light and the start-up itself is disabled.

6 is a schematic diagram of a sensor array module unit of an engine oil state detection apparatus for a vehicle according to the present invention.

The sensor array module unit 100 may include a circuit wiring 115 for receiving power and a signal, and a sensing sensor formed of carbon nanotubes connected to the circuit wiring 115 and sensing a change in electrical conductivity or capacitance. 120, a substrate 111 on which the detection sensor 120 and the circuit wiring 115 are mounted, wherein the detection sensors are arranged in a pyramid shape.

Here, the circuit wiring corresponds to a circuit comprising the sensor driver 110 and the small signal amplifier 120 of the sensor array module 100 of FIG. 5, and the shape of the board and the position of the circuit wiring are conveniently changed. Can be.

In addition, the dotted line A and the dotted line B of FIG. 6 represent the highest level and the lowest level, respectively, when they are at the appropriate level of oil in an engine oil tank.

Therefore, above the A level, there is a fear that the engine oil exceeds the appropriate level and overflows into the engine compartment.

On the other hand, below the B level, the engine oil is in a insufficient state, and there is a fear that engine overheating, wear, and the like may occur.

Therefore, the sensor array module 100 in the arrangement of the detection sensor 120 in order to detect such an engine oil level abnormality, the highest detection sensor 120a is located on the A line which is the highest oil level, When a signal is generated from the detection sensor 120a, the oil indicates the oil level exceeding the proper level.

In the conventional oil level determination, a plurality of intermediate sensing sensors 120 indicate the level of oil and continuously adjust the level of oil according to the operation of the sensing sensor 120 according to the oil level. You can judge.

In addition, the lower sensor 120b is located at the lowest level of the proper level of oil, and if no signal is generated from the lower sensor 120b, it indicates that the amount of oil is lower than the proper level.

In the engine oil detection apparatus of a vehicle according to the present invention, the arrangement of the detection sensors 120 is characterized in that a plurality of sensors are positioned downward as the oil level is lowered.

This is because each of the detection sensors 120 detects a state such as the degree of deterioration of the oil in real time, and as the new engine oil is used after being injected, the state of the engine oil may change as time passes and the level of the engine oil is lowered. Since there is a great possibility, at this time it is to determine a more accurate oil state as a plurality of sensors 120.

In addition, in the engine oil detection apparatus for a vehicle according to the present invention, the oil state determination unit 240 receives a signal of a plurality of detection sensors that operate according to the change in the oil level, calculates an average value and calculates a signal comparison determination module ( In 200, it is characterized by more accurately determining the deterioration state of the engine oil.

Now, the detection process by the engine oil condition detection apparatus for an automobile according to the present invention including the function as described above will be described.

7 is a flowchart of an embodiment for detecting engine oil change timing for an automobile and oil replenishment timing according to the present invention.

First, when the engine oil and the carbon nanotubes constituting the sensor 120 of the sensor array module in contact with the engine oil chamber and the vehicle is powered on, the operation of the various load devices provided in the vehicle by the power supplied from the battery Is started (S101).

In this case, the power supply unit converts the DC 12V power supplied from the battery into the 15V power required by the sensor array module 100, the signal comparison determination module 200, and the display unit 400, and the sensor driver 110 and the detection sensor. The power supply is converted into a 5V power required by the unit 120 and then supplied to a load.

The sensor array module 101, which is made of a micro sensor including carbon nanotubes and installed in an oil chamber, first measures a signal for newly injected engine oil, and the measured signal is measured by the small signal amplifier 110. After the amplification, the oil level determination unit 220 measures the level of the engine oil through the presence or absence of a signal generated by the sensor according to a predetermined position of the sensor (S102).

Here, when the initial oil amount of the engine oil of the vehicle is measured and there is an oil level or more, an indication of oil excess or oil supplement is displayed (S103).

At this time, when the level of the engine oil indicates the lowest level, it operates with a warning light to disable the starting itself.

In addition, when there is no abnormality in the step of measuring the initial oil amount of the engine oil of the vehicle, the measurement is terminated, and the measurement result is stored in the storage device while the start-up is turned on to maintain the measurement display. .

Next, when the oil level is normal, the engine is started and the oil is circulated to start the real-time check of the oil state (S104).

According to the engine start-up, the initial reference value is set by measuring the dielectric constant or electric conductivity of the newly injected engine oil, and if there is already set the initial reference value, the initial reference value is checked (S105).

Thereafter, the detection sensor unit 120 detects a change in dielectric constant or electrical conductivity of the engine oil that is varied according to deterioration, amplifies information in the small signal amplification unit 130, and then compares the signal comparison determination module 200. When applied to the oil state determination unit 220 and the oil remaining amount determination unit 240, which is a microprocessor of the microprocessor, the degree of deterioration of the engine oil is determined from the change in permittivity or electrical conductivity of the engine oil detected by the oil state determination unit 220. It compares with the set reference value to determine, and determines whether the comparison result is normal or abnormal (S106, S107).

If the permittivity or electrical conductivity of the engine oil currently detected as a result of the comparison of the oil state does not exceed the set reference value, it is determined that the state of the current engine oil is normal and returns to the process of detecting the signal (S108). If it is determined that exceeds, the deterioration of the engine oil proceeds more than the standard to determine the exchange time that the characteristics of the oil does not proceed the normal lubrication of the engine and outputs information about it (S109).

Therefore, the engine oil replacement time has been amplified by amplifying the engine oil excess / replenishing and replacement time indication signal applied by the oil state determination unit to a predetermined level, and the display unit comprising a lamp or LCD display means in the cluster. Information is displayed in a predetermined manner such as a text or a symbol to notify the driver.

As described above, the present invention provides convenience by measuring the replacement time and the replenishment time of the engine oil so that anyone can easily determine the replacement time of the engine oil without the help of an experienced inspector.

In addition, by ensuring that the replacement and replenishment of the engine oil is made at the correct time, the durability of the engine protection of the vehicle is increased, and unnecessary repair costs are eliminated.

Claims (13)

A power supply unit converting power supplied from a vehicle battery into necessary power and supplying the converted power; The sensor and the sensor for controlling the operation of the sensor sensor when the power is supplied from the power sensor and the sensor unit including a plurality of sensing sensors consisting of carbon nanotubes and detects the properties of the engine oil in operation A sensor array module unit including a small signal amplifying unit for amplifying the detected fine signal; Engine oil according to the oil state determination unit for determining the deterioration state of the engine oil with respect to the detection signal transmitted from the sensor array module unit compared to the set reference value and the detection sensor operated according to the oil level of the plurality of detection sensors A signal comparison judging module unit including an oil residual judging unit determining a level of the oil; And a display unit for displaying the signal output from the signal comparison determination module unit in a text or a predetermined manner as oil excess, supplementary warning, or oil change timing information. The method of claim 1, Each detection sensor of the sensor module unit, A circuit connection terminal to which power is applied and a signal is received; A sensing film connected to the circuit connection terminal and formed of carbon nano tubing for sensing a change in electrical conductivity; And And an electrode and a substrate on which the sensing film is mounted. The method of claim 1, Each detection sensor of the sensor module unit, An electrode to which power is applied; A sensing film connected to the electrode and formed of carbon nanotubes for sensing a change in dielectric constant; And And a dielectric constant detection sensor comprising the electrode and a substrate on which the sensing film is mounted. The method of claim 1, The arrangement of the detection sensors, the vehicle engine oil state detection device, characterized in that the plurality of sensors are positioned as the oil level is lowered. The method of claim 1, The detection sensor of the vehicle sensor oil state, characterized in that arranged in a pyramid shape. The method of claim 1, And the sensor array module and the signal comparison determination module are mounted on one printed circuit board and manufactured as one unit. The method of claim 1, The oil state determination unit is an automobile engine oil state detection device, characterized in that to determine the deterioration state of the engine oil by receiving the signals of the detection sensors operated in accordance with the change in the oil level to calculate the average value. The method of claim 1, In the arrangement of the detection sensor of the sensor array module, the highest detection sensor is a vehicle engine oil condition detection device, characterized in that located above the appropriate oil level. The method of claim 1, In the arrangement of the detection sensor of the sensor array module, the lowest detection sensor is a vehicle engine oil condition detection device, characterized in that located at the lowest of the appropriate oil level. The method of claim 1, The starter ignition device is connected to the oil level determination part of the signal comparison determination module to start the engine off when the level of the engine oil indicates the lowest level. Supplying power to each load by turning on the power supplied from the vehicle battery; Measuring an initial amount of oil in the engine oil of the vehicle and indicating an oil excess or oil supplement when there is an oil level or more; Starting the engine and circulating the oil to start a real time check of the oil condition; Setting an initial reference value by measuring dielectric constant or electrical conductivity of engine oil in a sensor array module installed in the engine oil chamber; And When the detection sensor of the sensor array module detects a deterioration state of the engine oil by detecting a deterioration state of the engine oil, the oil state determination unit continues the periodic measurement when it is normal compared to the set reference value, and when the oil characteristic abnormality occurs. And indicating an exchange. The method of claim 11, wherein Measuring the initial amount of oil in the engine oil of the vehicle, if there is more than the oil level If the engine oil level indicates the lowest water level further comprises the step of operating to turn off the engine oil state, characterized in that it further comprises the step of operating . The method of claim 11, wherein If there is no abnormality in the step of measuring the initial oil amount of the engine oil of the vehicle, the measurement is terminated, and the measurement result is stored in the storage device while the start-up is turned on to maintain the measurement display Car engine oil condition detection method.

Images