KR100518212B1 - Apparatus for sensing the changing time of lubricant and parts on the basis of the amount of fuel consumed in car - Google Patents

Abstract

The present invention is set on the basis of the fuel consumption of a vehicle such as gasoline or diesel, the cumulative calculation of the fuel usage, the engine oil is replaced every time the appropriate amount of fuel is used, and according to the number of replacement of the engine oil and various lubrication oil and Inform the driver of parts replacement time so that various lubricating oils and parts can be replaced according to more accurate basis to prevent driver's confusion and to replace lubricating oils and parts in the optimal state. The present invention relates to an apparatus for detecting lubricating oil and parts replacement timing by extending fuel consumption of an automobile.

The present invention calculates and accumulates fuel consumption using a fuel injection signal applied to a solenoid coil of an injector in an ECU, and when the accumulated fuel usage reaches a set fuel amount, the fuel consumption amount of a vehicle informing that the engine oil is replaced. In the lubricating oil replacement time detection device, a control unit for informing the driver of the lubrication oil and parts replacement time according to the number of times of replacement of the engine oil is provided, the control unit is connected to one end of the solenoid coil of the injector And a shaping circuit for removing and stabilizing the counter electromotive force of the solenoid coil, an oscillating circuit connected to an output terminal of the shaping circuit to generate a clock of a predetermined period during fuel injection time from the ECU to the solenoid coil, and one end of the oscillating circuit. Fuel injection to the solenoid coil connected to A frequency regulator for adjusting the clock period of the oscillation circuit output for a time, and connected to an output terminal of the oscillating circuit to read clock number information of the oscillating circuit and output a control signal when the number of clocks reaches a predetermined value Engine oil which is connected to one end of the clock coefficient unit, a drain switch for initializing the clock coefficient unit when an engine oil is exchanged, and a control signal of the clock coefficient unit, indicating an engine oil replacement time. Warning lights, and up and down buttons are provided at the output end of the clock coefficient unit, and the first to ninth preset decades for sequentially lighting the lamps installed on the first to ninth indicators through respective output stages when a control signal is applied. And supplying the driving power to the clock coefficient unit and the first to ninth preset decades at all times. It is characterized in consisting of a battery.

Description

Apparatus for sensing the changing time of lubricant and parts on the basis of the amount of fuel consumed in car}

The present invention relates to a lubricating oil and parts replacement time detection device according to the amount of fuel consumption of the vehicle, and more particularly, based on the fuel consumption of the vehicle, such as gasoline or diesel, but the cumulative calculation of this fuel usage to calculate the appropriate fuel amount The engine oil is replaced each time it is used, and the operator is informed of the timing of the replacement of various lubricating oils and parts according to the number of replacement of the engine oil, so that various lubricating oils and parts can be replaced according to a more accurate basis. The present invention relates to a detection device for lubricating oil and parts replacement due to the amount of fuel consumption of a vehicle that can prevent crosstalk and extend the life of the vehicle so that replacement of the lubricating oil and parts can be performed in an optimal state.

In general, automotive engine oil cools, cleans, seals, distributes stress, and anti-rusts in addition to reducing friction and wear generated from engine lubrication. Carbonization proceeds and a viscosity increase and decrease occurs due to the reduction of additives and the mixing of foreign substances such as fuel oil and water.

As such, when the viscosity of the engine oil is reduced below a predetermined value, wear of the metal contact surface may lead to deterioration or breakdown of the engine, and when increased, engine failure due to power loss and engine overheating may occur.

Therefore, the engine oil should be replaced periodically, and the engine oil replacement cycle is 10,000 km in the maintenance manual of the automobile maker, and 5,000 km in severe conditions. Nevertheless, some drivers have exchanged at about 3,000 km for 10%.

In addition, depending on the maintenance manual and maintenance shop, the replacement cycle is two to three times different, and even in the media, the difference is great for each performer.

As such, the standard of oil change or the absence of a certain standard is inevitably based on vague mileage, and a device for informing the driver of various oil replacement times based on such mileage is widely known.

In other words, Patent No. 240699 (Registration Date 1999.10.29), Publication No. 98-47174 (Publication Date 1998.09.15) and Publication Utility Model No. 99-2105 (Publication Date 1999.01.15) If the accumulated mileage reaches a certain level, it flashes a warning light and emits a warning sound to inform the driver of oil replacement time.

The prior art as described above is to inform the driver of the time to change the oil on the basis of the mileage, but when compared to the city driving and highway driving, the average speed 20 to 40 km when driving in the city, 80 to 110 km when driving on the highway At the same distance, the engine running time varies by 4-6 times, and the fuel economy is about 2 to 3 times the difference between the city run and the 60 km constant speed. The way to tell is that there is an ineffective problem.

When the engine oil is replaced based on the mileage as described above, a switch must be initialized by installing a switch between the drain plug and the oil pan. There is a possibility of damage to the oil pan due to collision with the ground, and the inspection of the actual oil pan shows that more than 70% of the oil pan is crushed by the collision with the ground.

In addition, as another method for determining the timing of the replacement of various oils, as described in Korean Utility Model No. 99-24925 (published date of publication 1999.07.05), the viscosity of the oil is measured, and when the viscosity is out of a certain range, It is supposed to send out a flashing light and a warning sound to alert the user.

As described above, the conventional technology of informing the driver of the oil replacement time by measuring the viscosity of the oil should not only use an expensive viscosity sensor that depends on imports, but is also installed inside the oil pan, so that the actual oil inside the oil pan is extremely severe. Due to the harsh environment such as swelling, scattering, crankshaft rotation, and flow of blow-by gas, the oil's ability to detect viscosity decreases and precision is reduced.In addition, when the viscosity sensor is installed, the oil pan or engine block is drilled or deformed. In most cases, there are many problems with the installation.

In particular, recently, a method of alarming the deterioration state of oil by measuring a change in the dielectric constant of oil has been developed, but it is difficult to measure the viscosity that has the greatest effect, so it is difficult to expect consistent data when incorporating foreign substances such as fuel oil, moisture, and coating agents. .

In general, engines of gasoline and diesel automobiles are heat engines whose heat is changed to work according to the laws of thermodynamics, and the heat of combustion of gasoline supplied to the combustion chamber is converted into work and discharge heat, and as the engine works, friction, wear, oxidation, carbonization, fuel oil Mixing will occur and engine oil will deteriorate.

Therefore, when the replacement cycle of engine oil and various parts is used as the mileage, frequent stops, traffic jams, rapid start, sudden braking, air conditioner operation, cargo loading, and aging of engines are caused by low-speed driving and traffic lights. Although they do not appear at all, they can be accurately reflected in terms of fuel use.

The present invention is based on the above-mentioned issues, but set based on the fuel consumption of the vehicle, such as gasoline or diesel, the cumulative calculation of this fuel usage to inform the driver when to replace the engine oil whenever the appropriate amount of fuel is used. In addition, by informing the driver of the replacement time of various lubricating oils and parts according to the engine oil replacement frequency, various lubricating oils and parts can be replaced according to a more accurate basis to prevent the driver's confusion and the lubricating oil in the optimal state. And it is a technical problem that the replacement of parts is made so that the life of the car can be extended.

The present invention calculates and accumulates fuel consumption using a fuel injection signal applied to a solenoid coil of an injector in an ECU, and when the accumulated fuel usage reaches a set fuel amount, the fuel consumption amount of a vehicle informing that the engine oil is replaced. In the lubricating oil replacement timing detection device, when the fuel injection signal is clocked and counted in the solenoid coil of the injector by the ECU, and when the set fuel amount is used by accumulating the amount of fuel used by the counted clock, the engine oil replacement timing In the apparatus for detecting the lubrication oil replacement time according to the amount of fuel consumption of the vehicle informing that the lubrication oil, the control unit is provided to inform the driver of the replacement time of the various lubrication oil and parts according to the number of times of replacement of the engine oil, the control unit is The solenoid connected to one end of the solenoid coil A shaping circuit for removing and stabilizing the counter-electromotive force of the decoil coil, an oscillating circuit connected to an output terminal of the shaping circuit and generating a clock of a predetermined period during fuel injection time from the ECU to the solenoid coil, and connected to one end of the oscillating circuit. A frequency regulator for adjusting a clock period of the oscillation circuit outputted to the solenoid coil during fuel injection time, and connected to an output terminal of the oscillation circuit to read clock number information of the oscillation circuit and the number information of the clock is fixed to a predetermined value. When reaching, the clock coefficient unit for outputting the control signal, the drain switch connected to one end of the clock coefficient unit for initializing the clock coefficient unit when the engine oil exchange, and the control signal of the clock coefficient unit is lit by the engine oil Engine oil warning lamp for notifying the time of replacement of the A first to ninth preset decade counted to sequentially turn on lamps provided to the first to ninth indicators through respective output stages when an up-down button is provided, and the clock coefficient unit and the first to And a backup battery that constantly supplies driving power to the ninth preset decade.

Hereinafter, the configuration and the working relationship will be described in detail with reference to FIGS. 1 to 4 as follows.

1A is a structural diagram of a gasoline injector of a vehicle, FIG. 1B is a circuit diagram of a gasoline injector control circuit of a vehicle, and FIG. 1C is a fuel injection waveform diagram applied to an injector in an electronic control unit of a vehicle.

The injector 10 includes a solenoid coil 11 magnetized by a signal of an electronic control unit (hereinafter referred to as "ECU") 15, and a flanger 12 and a needle opened by magnetization of the solenoid coil 11. It consists of a valve 13, the ECU 15 detects the output signal of the air pro sensor, the throttle position sensor (TPS), the crank angle sensor and sends a spray signal according to the magnetization of the solenoid coil 11, the needle valve ( 13 is integrated with the flanger 12 so that when it is pulled to the fully open position with the flanger 12, the injection hole is opened to inject fuel.

At this time, the fuel injection amount is determined by the time that the needle valve 13 is opened, that is, the time that power is supplied to the solenoid coil 11, and the fuel injection time, that is, magnetizing the solenoid coil 11 in the ECU 15. The pulse width of the signal in is determined by the sum of the basic injection time calculated by the output signals of the air flow sensor and the crank angle sensor, and the corrected injection time calculated by the output signals of the water temperature sensor, the intake air temperature sensor, the throttle position sensor, and the oxygen sensor. .

Therefore, the fuel consumption amount is measured by accumulating the power supply time applied to the solenoid coil 11 and the fuel injection amount injected per minute from one injector by accurately proportioning the time when the power is supplied to the solenoid coil 11 and the fuel injection amount. can do.

In this way, in order to accumulate the power supply time applied to the solenoid coil 11, the solenoid of the injector 10 is connected to the terminal 14 formed in the injector 10 shown in FIG. 1B through the probe 18 through the probe 18. The change in the voltage across the coil 11, that is, the fuel injection waveform can be observed.

FIG. 1C is a fuel injection waveform applied from the ECU 15 to the solenoid coil 11 of the injector 10 at idle, with the switching transistor TR on at T1 and on at T2 for each portion of the waveform. The section length of T1 to T2 is turned off to become the fuel injection time Ti, and the waveform in which the voltage rises is a voltage which is increased by the counter electromotive force of the solenoid coil 11, and this fuel injection time Ti Depends on the speed of the engine and many other conditions.

Therefore, by accumulating the power supply time applied to the solenoid coil 11 and the fuel injection amount injected per minute from one injector, the fuel consumption is measured and the driver is notified of the replacement time of the engine oil. Therefore, not only the lubrication oil such as transmission oil, brake oil, coolant, etc., but also before and after the brake lining, fuel filter, spark plug, timing belt, canister, etc. are notified to the driver of the present invention. The same effect can be obtained when measuring the bias power supply time applied to the base terminal of the switching transistor TR of the ECU 15 in addition to the power supply time applied to (11).

2 is a block diagram of the control unit 20 in the vehicle lubricating oil and parts replacement time detection device according to the present invention, one side of the solenoid coil 11 built in the injector 10 through a probe (14) A control relay 16, a start switch 19, and a battery 17 are connected in series with the other end of the solenoid coil 11 at 18.

The probe 18 includes a shaping circuit 21 for removing and stabilizing a portion generated by the counter electromotive force of the solenoid coil 11 when the fuel injection signal is applied from the ECU 15 to the solenoid coil 11 of the injector 10. Connected.

The oscillation circuit 22 is connected to the output terminal of the shaping circuit 21 from the ECU 15 to the solenoid coil 11 of the injector 10 to generate a clock of a predetermined period during the fuel injection signal application time. The other end of 22 is connected to the solenoid coil 11 with a frequency regulator 23 for adjusting the clock period of the oscillation circuit 22 output during the fuel injection signal application time.

Two first and second binary counters 24a and 24b are connected in series at the output terminal of the oscillator circuit 22, and the clock number information of the oscillator circuit 22 is read and the number information of the clock reaches a predetermined value. In this case, a clock counting unit 24 for outputting a signal is connected, and a reset stage (RST) terminal of the first and second binary counters 24a and 24b, which are the clock counting units 24, is connected to the first stage. A drain switch 25 for initializing the second binary counters 24a and 24b is connected, and an engine for notifying the driver of engine oil exchange is output at the output end of the second binary counter 24b, which is the clock coefficient unit 24. The oil warning light 26 is connected.

In addition, up and down buttons 27a to 27i are provided at an output terminal of the second binary counter 24b, which is the clock coefficient unit 24, to output control signals through respective output terminals when a signal is applied. Nine preset decades 29a to 29i are connected, respectively, and outputs of the first to ninth preset decades 29a to 29i are output to the output terminals of the first to ninth preset decades 29a to 29i. The first to ninth indicators 28a to 28i in which four, eight, and sixteen lamps are sequentially turned on by signals are connected to each other.

Here, the first indicator 28a is for indicating the replacement timing of the transmission oil, the second indicator 28b is for indicating the rear brake replacement, and the third indicator 28c is for timing timing replacement. The fourth indicator 28d is the fuel filter replacement timing, the fifth indicator 28e is the rear brake replacement timing, the sixth indicator 28f is the front brake replacement timing, and the seventh indicator 28g is the ignition. The plug replacement time, the eighth indicator 28h indicate the coolant replacement timing, the ninth indicator 28i indicates the replacement timing of the canister, and can be added to inform the replacement timing of various components such as an oxygen sensor. have.

In addition, a backup battery 17a is provided at a power terminal Vcc of the first and second binary counters 24a and 24b and the first to ninth preset decades 29a to 29i, which are the clock coefficients 24. Even when the driving power is supplied from the start switch 19 to the off state, the current information is retained.

4 is a configuration diagram of the drain switch 25 in the vehicle lubricating oil and parts replacement time detection device according to the present invention, coupled to inlet or discharge the engine oil in the ground (ground) engine oil fan 30 And a contact washer 32 connected to the reset terminal RST of the first and second binary counters 24a and 24b and an electric wire is coupled to the drain bolt 31 through which a small current flows at all times. When the 31 is removed from the engine oil fan 30, the drain switch 25 is turned off to initialize the first and second binary counters 24a and 24b.

If described in detail with reference to Figure 1 to the functional relationship of the vehicle lubricating oil and parts replacement time detection apparatus according to the present invention configured as described above are as follows.

In the case of a general gasoline injector, one injection time is about 2/100 to 30/1000 seconds, and a low level electric signal, which is an injection signal of the injector 10 as shown in FIG. When inputted to (22), the oscillation circuit 22 is configured to oscillate for a low level time.

If the injector 10 is operated for 2 / 1,000 seconds, if the lowest frequency is 2,000 kHz, four signals are countered, and this signal passes through the first and second binary counters 24a and 24b of 27 stages and is converted cumulatively. The time is 19 hours.

The cumulative conversion time can be adjusted by setting the resistance of the frequency regulator 23 and the time constant value of the capacitor differently, and the frequency controller 23 for setting the clock generation period of the oscillator circuit 22 is a digital switch. Set 10 steps as in Table 1.

That is, Table 1 below shows the frequency of generating the clock in the oscillator circuit 22 during the injection time per injector according to the setting of the frequency regulator 23.

Table 1

 Adjustment range setting number of frequency controller 23  Frequency (Hz)    Cumulative Conversion Hours per Injector (Hour)           0   1,964        19           One   2,272        16.4           2   2,630        14.17           3   2,926        12.74           4   3,235        11.52           5   3,520        10.59           6   3,850         9.68           7   4,125         9.04           8   4,403         8.47           9   4,667         7.99

As shown in Table 1, the frequency for generating the clock in the oscillator circuit 22 per injector is determined when the number selection of the frequency regulator 23 is adjusted. For example, if the frequency adjuster 23 is set twice, the frequency of 2,630 Hz is generated for 14.17 hours per injector, and the total oscillation becomes 2 ²⁷ .

In addition, Table 2 below shows fuel injection amount per one injector provided by an automobile manufacturer, fuel economy during 5,000km normal city driving (harsh condition), fuel injection time per injector, and the frequency regulator 23 accordingly. A setting example is shown.

Table 2

             division  Car type 1 minute injection rate per injector (a) Normal city running fuel economy (b)             <Condition> 5,000km driving Adjustment range setting number of the frequency regulator (23) Total fuel consumption during running (c) Accumulation of injection time per injector    5,000 ÷ (b) (c) × 1000 ÷ (a) ÷ 60 ÷ cylinders Verna, Avante (4 cylinders) 170 cc / min 11 km / ℓ      454.5ℓ    11.13hr       4 Stacker Schuma (1.8DOHC) (4 cylinders) 220 cc / min 8.5 km / ℓ      588.2ℓ    11.14hr       4 Granger XG (2.5) (6 cylinders) 200 cc / min 6 km / ℓ       833ℓ    11.56hr       4 EF Sonata, Optima (4-cylinder) 311cc / min 6.5km / ℓ      769ℓ    10.3hr       5 Grandeur 3.0, Equus 3.0 (6 cylinders) 253cc / min 5 km / ℓ     1000ℓ    10.97hr       5

As shown in Table 2 above, the injection time per injector differs according to the automobile manufacturer and vehicle type, but the approximate time between the accumulation time of the injection time per injector of Table 2 and the setting number of the frequency regulator 23 is selected from Table 1. Thus, the frequency adjuster 23 can be adjusted and selected according to the current driver's vehicle type.

When the fuel injection signal as shown in FIG. 3A is applied from the ECU 15 to the solenoid coil 11 of the injector 10 while the driver selects and adjusts the frequency adjuster 23 according to the vehicle model as described above. According to the magnetization of the solenoid coil 11, the needle valve 13 and the flanger 12 together to inject a fuel open.

At this time, the fuel injection signal as shown in FIG. 3A from the ECU 15 to the solenoid coil 11 of the injector 10 is applied to the waveform shaping circuit 21 through the probe 18, thereby providing the solenoid coil 11. An unnecessary portion generated by the back EMF is removed and the waveform is shaped to be stable as shown in FIG. 3B, and then applied to the oscillation circuit 22.

When the signal is applied from the waveform shaping circuit 21, the oscillation circuit 22 generates a pulse of a period set by the frequency regulator 23 during the fuel injection time, that is, the Ti section, and this pulse is the clock counting section 24. Information about the number of pulses inputted by being transmitted to the first binary counter 24a, and when the pulses are continuously input and the number set in the first binary counter 24a is filled, the second binary counter 24b. The first binary counter 24a is initialized to store the pulse information from the beginning while transmitting a counter rising signal.

When the above process is repeated and the storage of the pulse information is filled up by the number of counters set in the second binary counter 24b, the second binary counter 24b outputs a "high" level signal. When the engine oil warning light 26 is turned on, it indicates that the engine oil is to be replaced. At the same time, the signal of the “high” level output from the second binary counter 24b is received from the first to ninth preset decades 29a to 29. 29i), the first lamp of each indicator 28a to 28i is turned on.

Therefore, when the engine oil warning light 26 is turned on, the driver confirms that it is time to replace the engine oil and replaces the engine oil. In this case, when the drain bolt 31 is removed from the drain bolt 31 installed in the engine oil fan 30 to replace the engine oil and the waste oil is discharged, the contact washer 32 coupled with the drain bolt 31 is disposed. ) Is separated from the engine oil fan 30 so that the ground is off.

That is, as shown in FIG. 2, when the drain switch 25 is short-circuited, the first and second binary counters 24a and 24b of the clock coefficient unit 24 are reset to initialize all data stored up to now. Accordingly, the engine oil warning light 26 is turned off, but the first to ninth preset decades 29a to 29i are maintained in the current state, so that the first lamp of the indicators 28a to 28i is kept on. Done.

After the replacement of the new oil in the engine oil fan 30, when the drain bolt 31 is fastened to the engine oil fan 30 in which the drain switch 25 connected to the contact washer 32 maintains the ground. The first and second binary counters 24a and 24b of the clock counting unit 24 become operable to restart the counting of the clock output from the oscillation circuit 22.

When the engine oil replacement process is repeated, the lamps of the indicator lights 28a to 28i are sequentially turned on in the first to ninth preset decades 29a to 29i as many times as the engine oil is replaced. The number of turns of 28a to 28i confirms the number of engine oil replacements, and the number of replacement parts of the engine oil determines the replacement time of other components and lubrication oils.

That is, Table 3 below shows the replacement time of various lubricating oils and parts according to the replacement frequency of the engine oil, which is compared with the normal mileage.

Table 3

    Replacement Part Name Normal exchange driving distance      Engine oil change      Remarks     Engine oil  5,000 km If necessary adjust with frequency regulator    Transmission oil  40,000 km         8 Front brake lining  20,000 km         4 Back brake lining  40,000 km         8    Timing belt  40,000 km         8    Fuel filter  40,000 km         8    Spark plug  20,000 km         4     cooling water  20,000 km         4   Brake oil  40,000 km         8     Canister  80,000 km        16

That is, as shown in Table 3, the transmission oil, the rear brake lining, the timing belt, the fuel filter, and the brake oil are replaced once every eight engine oils, and the front brake lining, the spark plug, the coolant, and the engine oil are replaced four times. The canister is replaced once every 16 engine oils.

In addition, the driving power is continuously supplied to the first and second binary counters 24a and 24b and the first to ninth preset decade counts 29a to 29i by the backup battery 17a. By maintaining the current information even when the start switch 19 is off, the driver can visually check the progress and remaining time until the time of replacement of various lubricants and components at all times.

Therefore, according to the present invention, the deterioration, aging, and wear of various lubricating oils and components are proportional to fuel consumption, so that when a certain fuel is used, the engine oil is replaced, and the lubricating oil and By replacing the parts, the scientific time will inform the replacement time.

In the present invention, the scope of application is not limited to the injector of a gasoline engine, but the injector of the recent common rail electromagnetic direct injection diesel engine also has the same mechanism as the gasoline injector, so that the frequency of the oscillation circuit is increased to be applied in the same way as the gasoline engine. Can be.

As described above, the present invention is set on the basis of the fuel usage of a vehicle such as gasoline or diesel, and the engine oil is exchanged every time the appropriate fuel amount is used by accumulating the fuel usage, and the frequency of exchange of the engine oil is In this way, the operator is informed of the replacement time of various lubricating oils and parts.

For example, when the same fuel consumption is used, the degree of deterioration of the engine oil is the same, so that vehicles with a lot of highway driving are replaced at 9,000 ~ 10,000km and vehicles with a lot of city driving at 4,000 ~ 5,000km. Depending on the mileage, the cross-talk exchange will disappear.

Therefore, fuel consumption means that various lubricating oils and parts can be replaced on a more accurate basis to prevent driver's confusion and to replace lubricating oils and parts in an optimal state, so that the safety operation of the car and the life extension can be performed. Pollution prevention effect.

In addition, the operator can visually check the progress and remaining time until the change of lubricants and parts, and the time remaining, as well as alleviate the hassle of busy modern people remembering and recording the change. There is.

1A is a structural diagram of a gasoline engine injector of an automobile.

1B is a circuit diagram of a gasoline engine injector control of an automobile.

1C is a fuel injection waveform diagram applied to an injector from an electronic control unit of a vehicle.

Figure 2 is a block diagram of the lubricating oil and parts replacement time detection device according to the fuel consumption amount of the vehicle according to the present invention.

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3 is an output waveform diagram of each stage of FIG.

Figure 4 is a block diagram of the drain switch in the vehicle lubricating oil and parts replacement time detection apparatus according to the present invention.

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

10 Injector 11 Solenoid Coil 12 Plunger

13: Needle Valve 14: Terminal 15: Electronic Control Unit (ECU)

16: control relay 17: battery 17a: backup battery

18: probe 19: start switch 20: control unit

21 waveform shaping circuit 22 oscillation circuit 23 frequency regulator

24: clock counter 24a: first binary counter

24b: second binary counter 25: drain switch

26: engine oil replacement warning light 27a ~ 27i: up-down button

28a to 28i: first to ninth indicators

30: engine oil fan 31: drain bolt 32: contact washer

Claims (3)

(delete) (Correct) The ECU 15 calculates and accumulates fuel consumption using a fuel injection signal applied to the solenoid coil 11 of the injector 10, and when the calculated fuel usage amount reaches the set fuel amount, In the lubricating oil replacement time detection device according to the fuel consumption amount of the vehicle informing the replacement time, The control unit 20 is provided to inform the driver of the time to replace the various lubrication oil and parts according to the frequency of the engine oil replacement, The control unit 20 is connected to one end of the solenoid coil 11 of the injector 10 and the shaping circuit 21 to remove and stabilize the back electromotive force of the solenoid coil 11, An oscillation circuit 22 connected to an output terminal of the shaping circuit 21 and generating a clock of a predetermined period during fuel injection time from the ECU 15 to the solenoid coil 11; A frequency regulator 23 connected to one end of the oscillation circuit 22 to adjust a clock period of the oscillation circuit 22 outputted to the solenoid coil 11 during fuel injection time; A clock counting unit 24 which is connected to an output terminal of the oscillating circuit 22 to read clock number information of the oscillating circuit 22 and outputs a control signal when the number of clock information reaches a predetermined value; , A drain switch 25 connected to one end of the clock coefficient part 24 to initialize the clock coefficient part 24 when an engine oil is exchanged; An engine oil warning lamp 26 which is lit by the control signal of the clock coefficient unit 24 and notifies the timing of replacing the engine oil; Up and down buttons 27a to 27i are provided at the output terminal of the clock coefficient unit 24 so that lamps provided to the first to ninth indicators 28a to 28i are sequentially provided through respective output terminals when a control signal is applied. First to ninth preset decades 29a to 29i to be turned on; Lubrication oil and parts according to fuel consumption of the vehicle, characterized in that consisting of a backup battery 17a for supplying the driving power to the clock coefficient unit 24 and the first to ninth preset decade count (29a ~ 29i) at all times Exchange time detection device. (Correction) The drain switch 25 according to claim 2, Draining the Engine Oil in the Engine Oil Fan 30 The contact bolt washer 32 is connected to the reset terminal RST of the first and second binary counters 24a and 24b by a wire through which a fine current flows. ) Are installed in combination, Lubricating oil and parts replacement by fuel consumption of a vehicle, characterized in that configured to initialize the first and second binary counters 24a and 24b when the drain bolt 31 is separated from the engine oil fan 30. Timing sensor.