KR101724875B1 - Engine Oil Level Warning Method without Engine Oil Level Sensor and Warning System therefor - Google Patents

Engine Oil Level Warning Method without Engine Oil Level Sensor and Warning System therefor Download PDF

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Publication number
KR101724875B1
KR101724875B1 KR1020150102518A KR20150102518A KR101724875B1 KR 101724875 B1 KR101724875 B1 KR 101724875B1 KR 1020150102518 A KR1020150102518 A KR 1020150102518A KR 20150102518 A KR20150102518 A KR 20150102518A KR 101724875 B1 KR101724875 B1 KR 101724875B1
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KR
South Korea
Prior art keywords
pressure
engine oil
engine
lateral acceleration
value
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KR1020150102518A
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Korean (ko)
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KR20170010634A (en
Inventor
이승균
김근수
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현대자동차주식회사
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Priority to KR1020150102518A priority Critical patent/KR101724875B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/10—Indicating devices; Other safety devices
    • F01M11/12—Indicating devices; Other safety devices concerning lubricant level
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M2250/00—Measuring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M2250/00—Measuring
    • F01M2250/60—Operating parameters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M2250/00—Measuring
    • F01M2250/64—Number of revolutions

Abstract

In the engine oil level warning method of the present invention, when the vehicle speed of the vehicle by the controller 1, the engine RPM (Revolution Per Minutes) of the vehicle, and the lateral acceleration of the vehicle are detected after the engine is started, The acceleration is divided into the high lateral acceleration between the condition setting value of 1 G and the minimum setting value of 0.5 G and the low lateral acceleration of the minimum setting value of 0.5 G respectively and the lateral acceleration generated by the engine oil pressure mapping of the present lateral acceleration Value is applied as a correction value for the lateral acceleration at the time of detection of the engine oil pressure, and the level warning lamp 40 is turned on. Therefore, the function of the leveling sensor, which directly measures the engine oil level in the engine oil level warning system, is replaced with the engine oil pressure sensor 30 in which the lateral acceleration of the vehicle and the engine oil pressure to be mapped are detected.

Description

Technical Field [0001] The present invention relates to an engine oil level warning system,

The present invention relates to an engine oil level warning method, and in particular, to an engine oil level warning method in which an engine oil level sensor is not used, and an engine oil level warning system therefor.

Generally, the lack of engine oil causes damage to the engine's main throttle, so the engine oil capacity in the engine oil fan is constantly detected and the level warning light is turned on to compensate for the engine oil that the driver lacks when the oil capacity is insufficient.

To this end, the vehicle applies an engine oil level sensor. The engine oil level sensor is classified into a sensor type to which a pressure sensor or an ultrasonic sensor is applied, a level switch type to which MRS (Magnetic Reed Switch) is applied, or a level sensor type to which THR (Thermoresistive Heated Wire) is applied.

In particular, the ultrasonic sensor type engine oil level sensor is advantageous in measuring the oil level more accurately than the pressure sensor type by using ultrasonic waves transmitted to the oil surface and returning waves to the oil surface. It is advantageous for implementation.

Korean Patent Publication No. 10-2008-0007326 (2008.01.18)

However, since the ultrasonic sensor type oil level sensor is expensive, it is inferior in price competitiveness due to high manufacturing cost compared with other type of engine oil level sensor. Furthermore, the ultrasonic sensor-based engine oil level sensor needs to use the wiring for mounting the ultrasonic sensor separately, and the wiring position also has a low wiring safety by using the lower end of the engine.

In addition, the method in which the engine oil level sensor including the ultrasonic sensor system is used is installed at the lower end of the engine oil pan, so that it is vulnerable to breakage and is inferior in securing the engine layout.

In view of the above, the present invention applies a pressure mapping map having a warning lamp ignition pressure mapping value mapped to engine oil pressure appropriate for engine RPM (Revolution Per Minutes) based on the correlation between oil flow rate and pressure , The engine oil level sensor is not applied to the level warning lamp when the detected lateral acceleration of the vehicle is applied to the level warning stage and applied as the warning lamp lighting pressure mapping value under the condition of the lateral acceleration at which the engine oil pressure is detected And an engine oil level warning system therefor.

In order to accomplish the above object, there is provided an engine oil level warning method for an engine oil level sensor having an engine oil level sensor, the method comprising the steps of: (A) A level warning lamp lighting preparation step in which each of the lateral acceleration is detected and each detection value is identified as a value smaller than the condition setting value; (B) a low lateral acceleration having a minimum lateral acceleration set at a present lateral acceleration by the controller and a lateral acceleration at which the current lateral acceleration is greater than the minimum set value, and a low lateral acceleration A lateral acceleration separation step for respectively dividing the lateral acceleration and the lateral acceleration; (C) In the low lateral acceleration, the controller generates a lateral acceleration pressure correction value of the current lateral acceleration by matching the lateral acceleration and the engine oil pressure, and the lateral acceleration pressure correction value is mapped by engine RPM A rapid level warning lamp lighting step of immediately turning on the level warning lamp without counting the number of counts for lighting the level warning lamp when the warning lamp is lower than the pressure mapping value; (D) in the high-lateral acceleration, the controller generates a lateral acceleration pressure correction value of the current lateral acceleration by matching the lateral acceleration and the engine oil pressure, and the lateral acceleration pressure correction value is an engine oil temperature and an engine RPM A step of illuminating the level warning light when the number of counts for lighting the level warning lamp is less than a predetermined number, (E) a level warning lamp unlit step of turning off the level warning lamp when the controller detects the hood opening of the engine room hood or recognizes Key On or Key Off of the repeated key cylinder .

The controller initializes the level warning lamp lighting condition after discontinuing generation of the lateral acceleration pressure correction value at the time of recognizing the operation of the brake pedal, whereas when the brake pedal operation is not recognized, the controller determines that the vehicle speed is greater than a condition setting value of 10 kph (kilometer per hour) At the same time, after confirming that the engine RPM is larger than the engine IDLE RPM, which is the condition setting value, the generation of the lateral acceleration pressure correction value is continued.

The controller changes the engine oil pressure according to the engine RPM change of the engine immediately before the level warning lamp is turned on to the variable pressure control target pressure lower than the variable pressure control target pressure The level warning lamp is immediately turned on.

The controller determines whether the lateral acceleration pressure correction value is smaller than the warning light on pressure mapping value when the delay level warning light is turned on, and when the lateral acceleration pressure correction value is smaller than the warning light on pressure mapping value, The level warning lamp is turned on with a delay through a plurality of counting operations when the level warning lamp is turned on without delay through execution, when the lateral acceleration pressure correction value is larger than the warning lamp lighting pressure mapping value.

The controller checks whether the lateral acceleration pressure correction value is smaller than the engine IDLE oil pressure of the engine during the counting operation and stops the count execution when the lateral acceleration pressure correction value is smaller than the engine IDLE oil pressure of the engine And then the level warning lamp is turned on.

The controller is configured to, when switching to the delay level warning lamp lighting step, when the level warning lamp is turned on, and when the change value of the engine oil pressure is greater than a warning lamp lighting pressure mapping value added with a specific pressure value, And then turns off the level warning lamp when the change value of the engine oil pressure is greater than the warning lamp ignition pressure mapping value plus a specific pressure value even after the number of counts is repeated a number of times.

When the controller recognizes the signal of the hood open of the vehicle or repeatedly recognizes the key on / off of the engine, the controller turns off the level warning light.

In order to achieve the above object, an engine oil level warning system of the present invention includes an alarm lamp lighting pressure mapping map mapped to an alarm lamp ignition pressure mapping value segmented by engine RPM (Revolution Per Minutes) ; A lateral acceleration sensor for detecting a lateral acceleration of the vehicle; An engine oil pressure sensor for detecting an engine oil pressure supplied to the engine; The level warning lamp is turned on so that the engine oil shortage is warned to the driver when the lateral acceleration pressure correction value is smaller than the warning lamp lighting pressure mapping value, and generates the lateral acceleration correction value by matching the lateral acceleration value to the engine oil pressure value. Controller; .

The controller includes a key ON / OFF signal of the engine of the key cylinder, a speed detection value of the vehicle of the vehicle speed sensor, an engine RPM detection value of the engine RPM sensor, a brake pedal operation signal of the brake pedal sensor, A hood open signal is provided.

The controller initializes the generation of the lateral acceleration pressure correction value upon detection of the brake pedal operation signal and releases the lighting of the level warning light upon recognition of the key on / off signal repeatedly or recognition of the engine hood open signal .

The controller applies an engine ECU (Electronic Control Unit) incorporating the warning lamp lighting pressure mapping map.

The engine oil level warning method and warning system according to the present invention notifies the driver of the lack of the engine oil flow rate without the engine oil level sensor, and thus, the inaccuracy of the detection value due to the breakage caused by the engine oil level sensor and the engine layout Degradation and the like are all solved, and in particular, there is an effect that the price competitiveness is higher than that of an expensive ultrasonic sensor.

Further, the engine oil level warning system of the present invention has no added cost for engine oil level warning by configuring sensors and devices of individual functions applied to the vehicle in combination with each other. In particular, when the engine oil level sensor non- There is an effect that the engine oil level sensor is removed.

FIG. 1 is a flowchart of an engine oil level warning method for an engine oil level sensor according to the present invention, FIG. 2 is a configuration diagram of an engine oil level warning system for an engine oil level sensor according to the present invention, FIG. 4 is an explanatory map of a warning lamp lighting pressure by engine RPM according to the present invention, and FIG. 5 is a graph showing the relationship between the engine oil level and the engine oil level according to the present invention, FIG. 6 is an operating state in which the engine oil level warning system according to the present invention releases the warning lamp. FIG.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which illustrate exemplary embodiments of the present invention. The present invention is not limited to these embodiments.

1 shows a flowchart of an engine oil level warning method for an engine oil level sensor according to the present embodiment.

As shown in the figure, the engine oil level warning method includes a level warning lamp lighting preparation step (S10 to S24) for checking a level warning lamp lighting condition together with an engine start, a lateral acceleration pressure correction value after a lighting condition is satisfied, A level warning lamp lighting step (S25 to S43) for applying a correlation and lighting a level warning lamp, and a level warning lamp lighting canceling step (S51 to S60) for turning off the level warning lamp by changing the external condition after the level warning lamp is turned on.

Specifically, the level warning lamp lighting preparation step (S10 to S24) is performed to eliminate the possibility of a malfunction of the level warning lamp which is caused by an excessive idling of the engine due to excessive lateral acceleration during idling of the engine, can do. The level warning lamp lighting step (S25 to S43) is performed, so that the accurate level warning lamp can be lit not only when turning but also when the oil pressure drops during straight running, which means that the engine oil is insufficient. In particular, by performing the level warning light unlit step S51 to S60, it is possible to prevent the lighting state of the level warning light from being unnecessarily maintained.

On the other hand, FIG. 2 shows a configuration of an engine oil level alarm system for an engine oil level sensor according to the present embodiment.

As shown in the figure, the engine oil level warning system includes a controller 1 for outputting a control signal, a key cylinder 10 for providing the engine 1 with the engine starting operation, An engine oil pressure sensor 30 for detecting the pressure of the engine oil supplied to the engine and providing it to the controller 1, a controller (not shown) A level warning lamp 40 which is turned on or off by the power supply control of the engine 1, and a hood opening / closing sensor 50 which provides the controller 1 with opening of the engine hood.

Specifically, the controller 1 uses the key-on signal of the key cylinder 10 for recognizing the engine start, and the signal of the vehicle state detecting sensor for judging the vehicle running state including the engine upon lighting of the level warning lamp 40 A hood opening / closing sensor 50 that can use a signal from the engine oil pressure sensor 30 to determine the engine oil capacity upon detection by the engine oil pressure detection, Signal usage. To this end, the controller 1 is preferably provided with a dedicated controller for level warning lamp operation, but an engine ECU (Electronic Control Unit) is preferably applied.

Specifically, the vehicle state detection sensor includes a vehicle speed sensor 21 that detects the speed of the vehicle under running and provides it to the controller 1, an engine RPM sensor 21 that detects the engine RPM (Revolution Per Minutes) A brake pedal sensor 25 for detecting whether or not the brake pedal is operated and providing the brake pedal to the controller 1 and a lateral acceleration sensor 27 for detecting the turning degree of the vehicle and providing it to the controller 1. [

Specifically, the engine oil pressure sensor 30 detects the pressure that the engine oil pumped in the oil pump that is directly connected to the engine is sent to the engine, and provides the detected value to the controller 1. To this end, the engine oil pressure sensor 30 may be installed at the engine oil outlet of the oil pump or the engine oil inlet of the engine.

Specifically, the level warning light 40 is provided at the instrument cluster portion of the vehicle cluster or the dash panel, and includes an LED which forms an electric circuit with the battery, and the battery power is supplied or cut off under the control of the controller 1. [

Specifically, the hood opening / closing sensor 50 is installed in the engine room to detect opening of the hood and provides the hood opening / closing sensor 50 to the controller 1.

The engine oil level warning system further includes a warning lamp lighting pressure mapping map 1-1 configured to be included in or linked to the controller 1 and the warning lamp lighting pressure mapping map 1-1 includes a level warning lamp 40 The engine oil pressure acts to replace the leveling sensor. This is because the maximum pressure of the engine oil in the warning lamp lighting pressure mapping map 1-1 is closely related to the engine oil capacity, the engine oil capacity is known by the engine oil level, and the engine oil level is replaced by the engine oil pressure This is because it is based on the fact that

Referring to FIG. 3, the correlation between the engine oil capacity and the engine oil pressure can be known when the vehicle turns at 0.8G. As shown in the drawing, the relationship diagram between the engine oil pressure (Bar) and the engine oil capacity (L, Liter) shows that the maximum engine oil pressure is closely related to the engine oil capacity and that the engine oil supplied to the engine side , The engine oil pressure becomes short as the supply pressure of the engine oil becomes short when the engine oil is low. Therefore, the engine oil pressure is proved as a measure of the engine oil level.

Referring to FIG. 4, an example of the warning lamp lighting pressure mapping map 1-1 is shown. As shown in the figure, the warning lamp lighting pressure mapping map 1-1 can maintain the engine oil supply stability at an engine RPM of 2400 to 2600 rpm and an engine oil pressure of at least 2 bar at an engine oil temperature of 60 degrees or higher, The pressure is based on the pressure change due to the engine RPM due to the structure of the pump directly connected to the engine, the low pressure on the engine idling and the pressure drop on the sudden change of the vehicle (sudden turn, etc.). Therefore, the engine oil pressure mapping value of the warning light on-off pressure mapping map 1-1 is subdivided by intervals of the engine RPM (Revolution Per Minutes) and the intervals of the engine oil temperature, and each of the subdivided intervals is divided into engine RPM Minutes) and warning lamps for engine oil temperature. The warning light-on pressure mapping value means the engine oil pressure, and the detected lateral acceleration is matched to the engine oil pressure of 0.4 bar and the lateral acceleration of 0.1 G, whereby the lateral acceleration detected by the lighting judgment of the level warning lamp 40 Is used. That is, the lateral acceleration and the engine oil pressure are detected, respectively, and the detected lateral acceleration is used in the sulfur-reducing step of step S25, so that the warning lamp lighting pressure mapping map constructed by the relationship between the lateral acceleration of 0.1 G and the engine oil pressure of 0.4 bar 1-1), and the detected engine oil pressure is applied to the ignition error supplementing step according to the change of the engine oil pressure implemented in S36 to S38. Therefore, the warning lamp lighting pressure mapping map 1-1 can replace the function of the leveling sensor for directly measuring the engine oil level by the engine oil pressure sensor 30 for detecting the engine oil pressure mapped to the lateral acceleration .

Hereinafter, an embodiment of the engine oil level warning method of FIG. 1 will be described in detail with reference to FIGS. 5 and 6. FIG. Hereinafter, it will be apparent that the subject of the engine oil level warning method is the controller 1, and even if the controller 1 is not mentioned in the embodiment of the method, the subject is the controller 1.

The level warning lamp lighting preparation steps S10 to S24 are implemented as follows.

S10 is a step in which the controller 1 recognizes the engine On. Referring to FIG. 5, the controller 1 recognizes the key-on signal A provided by the key cylinder 10 once to control the engine in the operating state, and performs the procedure of the level warning lamp lighting preparation step do.

S21 is a step of the controller 1 checking the condition of the vehicle speed, S22 is a step of checking the condition of the engine RPM by the controller 1, S23 is a step of checking the condition of the vehicle braking by the controller 1, S24 is a step for the controller 1 to check the condition of vehicle turning.

Referring to FIG. 5, in the vehicle speed check of S21, the controller 1 reads the vehicle speed signal a provided by the vehicle speed sensor 21 to determine whether the current traveling speed of the vehicle exceeds a specific speed. Here, the vehicle speed signal a is defined as a current vehicle speed. As a result, if the current vehicle speed does not exceed the specific vehicle speed, the controller 1 continues the determination of the current running speed until the current vehicle speed exceeds the specific vehicle speed, whereas if the current vehicle speed exceeds the specific vehicle speed, the controller 1 enters the engine RPM checking step of S22. For this purpose, the controller 1 applies a vehicle speed> 10 kph (kilometer per hour). Here, ">" indicates an inequality indicating a magnitude relationship between two values, which indicates that the vehicle speed is greater than 10 kph. Also, the vehicle speed means the current vehicle speed.

Referring to FIG. 5, in the engine RPM check of S22, the controller 1 reads the engine RPM signal b provided by the engine RPM sensor 23 to determine whether the detected engine RPM exceeds the setting engine RPM. Here, the engine RPM signal b is defined as the current engine RPM. As a result, the controller 1 continues to judge the read engine RPM signal b if the current engine RPM does not exceed the set engine RPM, whereas if the current engine RPM exceeds the set engine RPM, . To this end, the controller 1 applies engine RPM > engine IDLE RPM. Here, ">" indicates that the engine RPM is a value greater than the engine IDLE RPM. Also, the engine RPM means the current engine RPM, and the engine IDLE RPM means the idling of the engine.

Referring to FIG. 5, in the vehicle braking check of S23, the controller 1 recognizes the brake pedal operation signal c provided by the brake pedal sensor 25 and determines whether the current vehicle is in a braking state. As a result, when the brake pedal operation signal c is recognized, the controller 1 is switched to the initial state, whereas when the brake pedal operation signal c is not recognized, the controller 1 enters the vehicle turning check stage of S24.

5, in the vehicle turning check in S24, the controller 1 reads the lateral acceleration signal d provided by the lateral acceleration sensor 27 and determines whether the lateral acceleration G exceeds the set lateral acceleration G . Here, the lateral acceleration signal d is defined as the present lateral acceleration G. As a result, when the current lateral acceleration G exceeds the set lateral acceleration G, the controller 1 reads the lateral acceleration signal d and continues the comparison with the set lateral acceleration G, Is not greater than the set lateral acceleration (G), it enters the lateral acceleration classification step of S25. To this end, the controller 1 applies the lateral acceleration G <1.2G. Here, "" is an inequality indicating a magnitude relation between two values, and indicates that the present lateral acceleration G is a value smaller than 1.2G. The lateral acceleration G means the current lateral acceleration G, 1.2G the condition setting value of the lateral acceleration G and 0.5G the minimum setting value of the lateral acceleration G.

The level warning lamp lighting step S25 to S43 includes a lateral acceleration sorting step S25 for classifying the lateral acceleration G into two stages, a delay level warning lamp lighting step S31 to S38 for the high lateral acceleration G, And a rapid level warning lamp lighting step (S41 to S43) at the time of acceleration (G).

The lateral acceleration classification step S25 is implemented as follows.

Referring to FIG. 5, the controller 1 which has entered S25 quickly realizes the response to the engine oil shortage even under the condition of straight running of the vehicle by dividing the current lateral acceleration G already read in S24 into two levels . For this, the controller 1 applies 0.5G <lateral acceleration (G) <1.2G. Here, "" indicates that the present lateral acceleration G is divided into a minimum lateral acceleration G of 0.5G or less and a maximum lateral acceleration G of 0.5G to 1.2G. As a result, the controller 1 enters S31 when the current lateral acceleration G is in the range of 0.5G to 1.2G, and enters S41 if the current lateral acceleration G is equal to or less than 0.5G. In this case, the present lateral acceleration G of 0.5 G or less means that the vehicle is almost in the straight running state, the present lateral acceleration G of 0.5 G to 1.2 G means that the vehicle is in the turning traveling state, The lateral acceleration (G) means that the vehicle is in a sudden turning running state. Therefore, the controller 1 immediately turns on the level warning lamp 40 in response to a decrease in oil pressure during normal straight running, which means that the oil is insufficiently supplied, and causes excessive excessive lateral acceleration, which is likely to cause malfunction, The level warning lamp 40 is not turned on.

The delay level warning lamp lighting step (S31 to S38) is implemented as follows.

Step S31 is a step of judging whether or not the controller 1 delays the level warning lamp 40. 5, the controller 1 reads the current engine oil pressure from the engine oil pressure signal B provided by the engine oil pressure sensor 30, detects the change of the engine oil pressure according to the engine RPM, Applies to error correction step. Further, the controller 1 switches the detection value to the lateral acceleration pressure correction value through the matching of the lateral acceleration and the engine oil pressure with respect to the current lateral acceleration G already read in S24, By comparing the lighting pressure mapping values, it is determined whether the level warning lamp 40 is turned on or turned on immediately. Therefore, the determination of the delay lighting of the level warning lamp 40 applies the lateral acceleration pressure correction value based on the lateral acceleration at which the present engine oil pressure is detected instead of the current lateral acceleration G, which is the actual detection value, The mapping map is adapted to apply a pressure mapping map (1-1) matched with 0.1G (lateral acceleration) and 0.4bar (engine oil pressure). To this end, the controller 1 reads the warning light on pressure mapping value in the warning light on pressure mapping map 1-1 and applies the lateral acceleration pressure correction value < warning light on pressure mapping value. Here, "" indicates that the lateral acceleration pressure correction value is smaller than the warning light-on pressure mapping value, which is an inequality indicating a magnitude relation between the two values. As a result, the controller 1 immediately lights the level warning lamp 40 at a value smaller than the warning lamp ON pressure mapping value while the lateral acceleration pressure correction value lights up at a large value.

For example, if the engine RPM is 2000 RPM and the engine oil temperature is 90 when the lateral acceleration pressure correction value is 1.5 bar, the lateral acceleration pressure correction value of 1.5 bar is smaller than the engine oil pressure mapping value of 1.6 bar, The level warning lamp 40 is immediately turned on.

As another example, if the engine RPM is 2000 RPM and the engine oil temperature is 90 degrees when the lateral acceleration pressure correction value is 1.7 bar, the lateral acceleration pressure correction value of 1.7 bar is larger than the engine oil pressure mapping value of 1.6 bar, After passing through steps S33 and S34, it is switched to S35 so that the level warning lamp 40 is turned on in a delayed manner. That is, the controller 1 uses the lateral acceleration pressure correction value as the current lateral acceleration pressure correction value, sets the number of counts to N = 1 (S32), compares the lateral acceleration pressure correction value with the engine IDLE oil pressure, The level warning lamp 40 is turned on (S33). On the other hand, if the lateral acceleration pressure correction value is larger, the number of counts is increased to N = 10 and then the operation is switched to S35 to turn on the level warning lamp 40 (S34).

5, the controller 1 continuously monitors the engine oil pressure signal B provided by the engine oil pressure sensor 30 even after the level warning lamp 40 is turned on, thereby detecting the vehicle speed, the lateral acceleration G, the engine RPM And the change in the engine oil pressure is applied to the judgment of whether the level warning lamp 40 is turned on or off. This is defined as a lighting error compensating step and is implemented in S36 to S38.

The controller 1 compares the engine oil pressure change value with the warning lamp ignition pressure mapping value (S36). If the engine oil pressure change value is greater than the warning lamp ignition pressure mapping value + the specific pressure (S37). If the state in which the engine oil pressure change value is greater than the warning light on pressure mapping value plus the specific pressure is continued for ten times, it is immediately switched to S60 so that the lighting of the level warning lamp 40 is a temporary error While if it does not last ten times, the lighting of the level warning lamp 40 is maintained (S38). To this end, the controller 1 applies an engine oil pressure change value> a warning light on pressure mapping value + a specific pressure, and the specific pressure applies 1 bar. Here, "&gt;" indicates that the engine oil pressure change value is greater than the warning light on-off pressure mapping value plus the specific pressure.

The quick level warning lamp lighting step (S41 to S43) is implemented as follows.

Step S41 is a step in which the controller 1 judges whether or not the variable pressure control is performed. 5, the controller 1 continuously monitors the engine oil pressure signal B provided by the engine oil pressure sensor 30 to detect changes in the engine oil pressure according to the vehicle speed, the lateral acceleration G and the engine RPM , The engine oil pressure change is defined as a variable pressure control engine oil pressure value, and it is determined whether or not the variable pressure control engine oil pressure value is less than the variable pressure control target pressure. As a result, when the variable pressure control engine oil pressure value is equal to or lower than the variable pressure control target pressure, the level warning lamp 40 is immediately turned on by shifting to S43, whereas if the variable pressure control engine oil pressure value is equal to or more than the variable pressure control target pressure, do. However, the entry of S42 can be entered directly without performing the step S41 when the controller 1 does not make the variable pressure control judgment of S41. Therefore, the variable pressure control determining step of S41 is an optional step.

S42 is a step for the controller 1 to turn on the level warning lamp 40 after switching the current lateral acceleration G to the lateral acceleration pressure correction value. 5, the controller 1 reads the current engine oil pressure from the engine oil pressure signal B provided by the engine oil pressure sensor 30, detects the change of the engine oil pressure according to the engine RPM, Applies to error correction step. Further, the controller 1 switches the detection value to the lateral acceleration pressure correction value through the matching of the lateral acceleration and the engine oil pressure with respect to the current lateral acceleration G already read in S24, And immediately turns on the level warning lamp 40 by comparing the lighting pressure mapping values. Therefore, a lateral acceleration pressure correction value based on the lateral acceleration at which the current engine oil pressure is detected instead of the current lateral acceleration G, which is the actual detection value, is applied to determine whether the level warning lamp 40 is turned on or turned on instantaneously, The warning light lighting pressure mapping value is applied to the pressure mapping map (1-1) matched with 0.1G (lateral acceleration) and 0.4 bar (engine oil pressure). To this end, the controller 1 reads the warning light on pressure mapping value in the warning light on pressure mapping map 1-1 and applies the lateral acceleration pressure correction value < warning light on pressure mapping value. Here, "" indicates that the lateral acceleration pressure correction value is greater than the warning light-on pressure mapping value as an inequality indicating the magnitude relationship between the two values. As a result, the controller 1 continues the comparison of the lateral acceleration pressure correction value to a value smaller than the warning light ON pressure mapping value, while the lateral acceleration pressure correction value is shifted from the value larger than the warning light ON pressure mapping value to S43, 40) immediately.

The level warning light unlit steps S51 to S60 are implemented as follows.

S51 indicates that the controller 1 recognizes the hood opening, and as a result, the lighting of the level warning lamp 40 is released as in S60. 5, the controller 1 recognizes the hood opening by the hood opening signal f provided by the hood opening / closing sensor 50, and the hood opening refers to the maintenance for replenishing the engine oil. Therefore, The warning light 40 is turned off.

S52 indicates that the controller 1 recognizes Key On / Off. As a result, the lighting of the level warning lamp 40 is released as in S60. 5, the controller 1 recognizes a key-on signal A provided from the key cylinder 10, and the key on / off repeated three times means the intention of the driver. ) Is turned off.

On the other hand, the controller 1 turns off the level warning light 40 as an event which occurred earlier in the detection of the hood opening of S51 (recognition of hood open) or the key on / off of S52.

As described above, the engine oil level warning method according to the present embodiment detects the vehicle speed of the vehicle by the controller 1, the engine RPM (Revolution Per Minutes) of the vehicle, and the lateral acceleration of the vehicle after the engine is started, The present lateral acceleration is divided into the high lateral acceleration between the condition setting value 1, 2G and the minimum setting value 0.5G and the low lateral acceleration with the minimum setting value 0.5G or less, and the engine oil pressure mapping Is applied as a correction value for the lateral acceleration at the time of detection of the engine oil pressure, and the level warning lamp 40 is turned on. Therefore, the function of the leveling sensor for directly measuring the engine oil level in the engine oil level warning system is replaced by the engine oil pressure sensor 30 in which the lateral acceleration of the vehicle and the engine oil pressure mapped are detected.

1: Controller 1-1: Warning light on Pressure mapping map
10: engine key cylinder 21: vehicle speed sensor
23: Engine RPM sensor 25: Brake pedal sensor
27: lateral acceleration sensor 30: engine oil pressure sensor
40: Level warning light 50: Hood opening / closing sensor

Claims (20)

After the engine is started, the controller detects the lateral acceleration of the vehicle and the engine oil pressure supplied to the engine, and applies the detected lateral acceleration to the classification of the high and low lateral accelerations while matching the lateral acceleration to the engine oil pressure, And then the lateral acceleration pressure correction value is compared with the engine oil temperature and the mapped warning light pressure mapping value mapped to engine RPM (Revolution Per Minutes), and then it is judged whether the level warning light for warning of engine oil shortage driver is lit Being;
The controller generates the lateral acceleration correction value when the detected value of the lateral acceleration satisfies a condition that the lateral acceleration is less than 1.2G, and the detected value of the lateral acceleration is 0.5G The low-level warning light is turned on at the time of the low-lateral acceleration when the lateral acceleration correction value is lower than the warning light-on pressure mapping value, And a delay level warning lamp lighting step for lighting the level warning lamp after counting the number of times for lighting the level warning lamp during acceleration;
And when the change to the delay level warning lamp lighting step is performed, when the change value of the detected engine oil pressure after the level warning lamp is turned on is greater than the warning lamp lighting pressure mapping value added with the specific pressure value, To keep
Wherein the engine oil level sensor is characterized by the following:
The method as claimed in claim 1, wherein the warning light on-off pressure mapping value is a unit of bar, which is expressed in units of bars in intervals of engine RPM (Revolution Per Minutes) and engine oil temperature intervals.
The method according to claim 1, wherein the controller stops generation of the lateral acceleration pressure correction value upon initial recognition of the operation of the brake pedal, and initializes the level warning light on condition.

delete delete delete delete 2. The engine control apparatus according to claim 1, wherein the controller, when considering the variable pressure control target pressure after switching to the rapid level warning lamp lighting step, changes the engine oil pressure according to the engine RPM change of the engine immediately before the level warning lamp is immediately turned on, And the level warning lamp is immediately turned on after confirming that the pressure control target pressure is equal to or less than the pressure control target pressure.
2. The method of claim 1, wherein the controller determines whether the lateral acceleration pressure correction value is less than the warning light on pressure mapping value when the delay level warning light is turned on, and then the lateral acceleration pressure correction value is greater than the warning light on pressure mapping value And a level warning light is turned on by a delay through a plurality of counting operations when the value of the engine oil level sensor is a large value.

The engine oil level sensor according to claim 9, wherein the controller illuminates the level warning light without a delay through counting when the lateral acceleration pressure correction value is smaller than the warning light on pressure mapping value. Way.
The controller as claimed in claim 10, wherein the controller checks whether the lateral acceleration pressure correction value is smaller than the engine IDLE oil pressure of the engine during counting, and the lateral acceleration pressure correction value is a value smaller than the engine IDLE oil pressure of the engine And the level warning lamp is turned on after the count execution is stopped.
delete The method according to claim 1, wherein the specific pressure value is 1 bar.
The engine control apparatus according to claim 1, wherein the controller turns off the level warning lamp when the change value of the engine oil pressure is greater than a warning lamp ignition pressure mapping value plus a specific pressure value even after the number of counts is repeated a number of times How to warn the engine oil level without oil level sensor.
The engine oil level control apparatus according to claim 1, wherein the controller recognizes a signal of a hood open of the vehicle or repeatedly recognizes a key on / off of the engine, How to warn the engine oil level without sensors.
A warning lamp lighting pressure mapping map in which a warning lamp lighting pressure mapping value segmented by intervals of engine RPM (Revolution Per Minutes) and engine oil temperature is mapped in bar units;
A lateral acceleration sensor for detecting a lateral acceleration of the vehicle;
An engine oil pressure sensor for detecting an engine oil pressure supplied to the engine;
An engine oil level warning method for an engine oil level sensor according to any one of claims 1 to 3, 8 to 11, and 13 to 15 using a lateral acceleration value and an engine oil pressure value, A controller for lighting a level warning lamp so as to be warned;
The engine oil level warning system comprising:
The hood opening / closing sensor according to claim 16, wherein the controller is configured to detect an engine RPM detection value of the engine RPM sensor, a brake pedal operation signal of the brake pedal sensor, Is provided with an engine hood open signal of the vehicle.
The engine oil level warning system according to claim 17, wherein the controller initiates generation of the lateral acceleration pressure correction value upon detection of the brake pedal operation signal.
The engine oil level warning system according to claim 17, wherein the controller releases the ignition of the level warning light upon repeated recognition of the Key On / Off signal or recognition of the engine hood open signal.
17. The engine oil level warning system according to claim 16, wherein the controller is an engine ECU (Electronic Control Unit), and the warning light on-off pressure mapping map is built in.
KR1020150102518A 2015-07-20 2015-07-20 Engine Oil Level Warning Method without Engine Oil Level Sensor and Warning System therefor KR101724875B1 (en)

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JP2013002321A (en) * 2011-06-14 2013-01-07 Toyota Motor Corp Oil quantity measuring apparatus
JP2014227942A (en) * 2013-05-23 2014-12-08 マツダ株式会社 Engine oil level detection device

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JP2013002321A (en) * 2011-06-14 2013-01-07 Toyota Motor Corp Oil quantity measuring apparatus
JP2014227942A (en) * 2013-05-23 2014-12-08 マツダ株式会社 Engine oil level detection device

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