KR101234630B1 - Apparatus for diagnosis fuel filter in vehicle and method thereof - Google Patents

Apparatus for diagnosis fuel filter in vehicle and method thereof Download PDF

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Publication number
KR101234630B1
KR101234630B1 KR1020070068794A KR20070068794A KR101234630B1 KR 101234630 B1 KR101234630 B1 KR 101234630B1 KR 1020070068794 A KR1020070068794 A KR 1020070068794A KR 20070068794 A KR20070068794 A KR 20070068794A KR 101234630 B1 KR101234630 B1 KR 101234630B1
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South Korea
Prior art keywords
fuel
fuel filter
temperature
negative pressure
cumulative
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KR1020070068794A
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Korean (ko)
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KR20090005612A (en
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김세용
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기아자동차주식회사
현대자동차주식회사
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Priority to KR1020070068794A priority Critical patent/KR101234630B1/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

The present invention provides accuracy and stability to the diagnosis results by the diagnosis of the fuel filter applying the environmental conditions and the driving conditions of the vehicle.

The present invention detects the temperature of the fuel when the engine is turned on to determine whether to maintain the predetermined reference temperature or more, if the fuel temperature is less than the reference temperature does not perform the fuel filter diagnosis, if the reference temperature is higher than the fuel filter diagnostic mode is entered Detecting the negative pressure of the fuel discharged from the fuel filter; counter-integrating the elapsed time when the negative pressure of the fuel is detected to be equal to or greater than the reference pressure; And the process of accumulating the number of lighting cycles, determining whether the cumulative time or cumulative number of engine warning lamps satisfy the set reference conditions, and when the cumulative time or cumulative number meets the set reference conditions, the fuel filter is replaced. The process of running lymphatic home mode.

Fuel Filter Diagnosis, Negative Pressure Sensor, Fuel Filter

Description

Fuel filter diagnosis device and method of vehicle {APPARATUS FOR DIAGNOSIS FUEL FILTER IN VEHICLE AND METHOD THEREOF}

The present invention relates to an apparatus for diagnosing a fuel filter of a vehicle, and more particularly, to an apparatus and method for diagnosing a fuel filter of a vehicle that provides accuracy and stability to a diagnosis result by diagnosis of a fuel filter applying an environmental condition and a driving condition of a vehicle. will be.

The fuel filter mounted on the vehicle is installed between the fuel tank and the injector to filter the fine debris and water mixed in the fuel so that only pure fuel can be injected into the combustion chamber.

As the fuel filter continues to operate the vehicle, clogging occurs due to residue, etc., and in the case of moisture, a large amount is collected at the bottom, and consequently, the fuel is introduced into the combustion chamber together with the fuel.

If the blockage of the fuel filter occurs, the normal fuel pressure is not formed in the entire fuel line pressurized by the fuel pump, thereby lowering combustion efficiency and deteriorating engine performance.

In addition, the filtering ability is lost and debris and moisture are introduced into the combustion chamber to lower the fuel efficiency, and cause serious damage to the fuel system such as the injector.

Therefore, in the vehicle, a negative pressure sensor is mounted around the fuel discharge portion of the fuel filter, and the negative pressure of the fuel discharged from the fuel filter is detected and then transmitted to the engine control means, and the negative pressure detected by the engine control means is higher than or equal to a predetermined value. When it is determined, the engine warning light is turned on to instruct the driver and mechanic to replace the fuel filter.

That is, if the negative pressure of the fuel filter discharge part is detected and the vehicle can be affected, it is determined that the fuel filter is clogged and the engine warning lamp is turned on by a predetermined method to induce replacement of the fuel filter.

In particular, in the case of diesel engines, if the blockage of the fuel filter lasts for a long time, serious adverse effects are caused on the operation of the engine, and the excessive negative pressure in the entire fuel line causes serious damage to the fuel system including the fuel pump and the injector.

However, in the fuel filter diagnosis method applied to the conventional vehicle, the engine warning lamp is turned on when it is determined that the fuel filter needs to be replaced when a negative pressure higher than a predetermined reference value is detected from the negative pressure sensor regardless of the environmental conditions of the vehicle.

Therefore, when residual fuel condenses on the fuel line at a cold ambient temperature in winter, and the fuel flow is not smooth, a negative pressure more than a predetermined reference value is detected from the negative pressure sensor and the engine warning light is turned on.

In other words, there is no problem in the vehicle substantially during the winter operation, but the engine warning light is turned on due to the residual fuel condensation on the fuel line, causing a problem for the driver.

In addition, a negative pressure more than a reference value is generated for a very short time due to various variables such as sudden acceleration of the driver, which changes frequently during driving, and at this time, an engine warning light is turned on to cause a driver embarrassment.

The present invention has been invented to solve the above problems, the object of which is to diagnose the abnormality of the fuel filter in consideration of the environmental conditions and driving conditions of the vehicle, to provide accuracy and stability to the diagnosis results.

That is, the engine warning lamp is turned on when the driving condition of the vehicle is realistically recognized and the engine warning lamp is not lit when the fuel filter is affected by the environmental condition and the driving condition even if the negative pressure is generated in the fuel filter.

A fuel filter diagnosis apparatus for a vehicle according to a feature of the present invention for realizing the above object includes: a fuel temperature detection unit mounted at a predetermined position in a fuel tank or on a fuel line to detect a temperature of a fuel; A negative pressure sensor mounted to a fuel discharge part of a fuel filter, the negative pressure sensor detecting a negative pressure generated by the fuel filter when fuel is supplied to the combustion chamber; A control unit for diagnosing a fuel filter by determining a driving environmental condition and a driving condition of the vehicle; A memory unit for storing a cumulative time and a cumulative number of engine warning lights that are turned on according to a driving condition of the vehicle; And an engine warning light, which is turned on under the control of the controller, to instruct the replacement of the fuel filter.

In addition, the fuel filter diagnosis method of a vehicle according to an aspect of the present invention, detecting the temperature of the fuel when the engine is turned on to determine whether to maintain a predetermined reference temperature or more; If the fuel temperature is less than or equal to the reference temperature, not performing the fuel filter diagnosis; and if the fuel temperature is greater than or equal to the reference temperature, entering a fuel filter diagnosis mode to detect negative pressure of the fuel discharged from the fuel filter; Counter-accumulating the elapsed time when the negative pressure of the fuel is detected to be greater than or equal to a reference pressure; Accumulating the lighting holding time and the number of lightings after the engine warning lamp is turned on when the elapsed time is equal to or greater than the set reference time; Determining whether a cumulative time or cumulative number of turning on of the engine warning light satisfies a set reference condition; If any one of the cumulative time or the cumulative number meets the set reference condition, the method includes guiding the replacement of the fuel filter and executing the lymph groove mode.

The present invention is expected to provide stability and reliability in the diagnosis of fuel filters.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention.

1 is a schematic configuration diagram of an apparatus for diagnosing a fuel filter of a vehicle according to an exemplary embodiment of the present invention, wherein the fuel temperature detector 101, the negative pressure detector 103, the controller 105, the memory unit 107, and the engine warning lamp 109 are illustrated. ).

The fuel temperature detector 101 is mounted at a predetermined position in the fuel tank or on the fuel line to detect the temperature of the fuel and provide information to the controller 105.

The negative pressure detector 103 is a negative pressure sensor mounted on the fuel discharge part of the fuel filter. The negative pressure detector 103 detects the negative pressure generated by the fuel filter when the fuel is supplied to the combustion chamber, and provides the controller 105 with information about the negative pressure.

The controller 103 analyzes the information of the fuel temperature detector 101 and the negative pressure detector 103 to determine specific driving conditions such as driving environment conditions of the vehicle and acceleration and deceleration of the driver, and when negative pressure is generated, but the vehicle is in a normal condition. Does not turn on the engine warning lamp 109 which induces replacement of the fuel filter.

The controller 103 may generate a temporary negative pressure due to condensation of residual fuel in the fuel line under cold weather conditions. Therefore, when the temperature of the fuel is at a predetermined temperature, for example, 37 ° C. or lower, the negative pressure diagnosis of the fuel filter may be performed. Do not run.

In addition, the controller 103 may generate a negative pressure due to a sudden acceleration or deceleration of the driver while driving, and thus, the engine warning light 109 may be turned on at any time, and thus the cumulative time and cumulative number of lighting of the engine warning light 109 may be adjusted. Only when the counter satisfies a predetermined condition, the engine warning lamp 109 is continuously turned on to warn and induce the replacement of the fuel filter, and then enters the limp home mode to induce maintenance of the vehicle.

The memory unit 107 stores a cumulative time and a cumulative number of engine warning lights that are turned on according to the driving conditions of the vehicle.

The engine warning light 109 is turned on under the control of the controller 105 to instruct the driver and the mechanic to replace the fuel filter.

An operation of diagnosing a fuel filter in the present invention including the function as described above will be described with reference to FIG. 2.

When the engine is started (S101), the control unit 105 detects the temperature of the fuel supplied to the fuel tank or the fuel line from the fuel temperature detection unit 101 (S102), and the reference temperature at which the temperature of the fuel is set (X ° C), For example, it is determined whether or not to maintain 37 ℃ or more (S103).

If the temperature of the fuel maintains the set reference temperature (X ° C) or less in the judgment of S103, the diagnosis of the fuel filter is not performed if the fuel temperature is determined to be equal to or higher than the set reference temperature (X ° C). Enter the mode (S104).

That is, when the temperature of the fuel is maintained at the set reference temperature of 37 ° C. or lower, condensation of residual fuel may occur in the fuel line. Therefore, the diagnosis of the fuel filter is not performed.

Subsequently, the control unit 105 detects negative pressure information of the fuel filter from the negative pressure detection unit 103 installed in the discharge portion of the fuel filter (S105) and determines whether or not the set reference pressure is higher (S106).

If the negative pressure of the fuel filter is equal to or less than the set reference pressure in S106, the diagnosis of the fuel filter is not executed. If the detected negative pressure is detected to be equal to or greater than the set reference pressure, the elapsed time detected to be equal to or greater than the reference pressure is counted and the memory unit 107 is stored. Accumulate at (S107).

Thereafter, it is determined whether the elapsed time accumulated in the memory unit 107 exceeds the set reference time (X minutes) (S108). If the elapsed time exceeds the reference time, it is determined that the fuel filter is abnormal. Lights (flashes) (S109).

When the engine warning light 109 is turned on (flashes), the holding time is accumulated and accumulated in the memory unit 107 (S110), and the number of times the engine warning light is turned on (flashing) is accumulated and accumulated in the memory unit 107. (S111).

As described above, it is determined whether the cumulative lighting time of the engine warning lamp 109 accumulated in the memory unit 107 exceeds the set reference time (X time) or the cumulative number exceeds the set reference number (X times) (S112).

The negative pressure detection unit 103 when the cumulative lighting time of the engine warning light 109 does not exceed the set reference time or the cumulative number of times when the engine warning light 109 is turned on (flashes) does not exceed the preset reference time. Determine whether the negative pressure is detected to maintain more than the set reference pressure (S113), if the reference pressure or more is returned to the process of S110, if the reference pressure is less than the diagnostic mode of the fuel filter (S114).

However, if the cumulative lighting time of the engine warning light 109 exceeds the set reference time or the cumulative number of times when the engine warning light 109 lights up (flashes) exceeds the set reference number, the fuel filter is replaced. After turning on the engine warning light 115 to induce (S115) to execute the limp home mode so that the replacement of the fuel filter can be made quickly (S116).

The embodiments of the present invention described above are not implemented only by the apparatus and method, but may be implemented through a program for realizing the function corresponding to the configuration of the embodiment of the present invention or a recording medium on which the program is recorded.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

1 is a diagram schematically illustrating an apparatus for diagnosing a fuel filter of a vehicle according to an exemplary embodiment of the present invention.

2 is a flowchart for performing fuel filter diagnosis in a vehicle according to an embodiment of the present invention.

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

101: fuel temperature detector 103: negative pressure detector

105: control unit 107: memory unit

109: engine warning light

Claims (5)

A fuel temperature detector mounted at a predetermined position in the fuel tank or on the fuel line to detect a temperature of the fuel; A negative pressure sensor mounted to a fuel discharge part of a fuel filter, the negative pressure sensor detecting a negative pressure generated by the fuel filter when fuel is supplied to the combustion chamber; A control unit for diagnosing a fuel filter by determining a driving environmental condition and a driving condition of the vehicle; A memory unit for storing a cumulative time and a cumulative number of engine warning lights that are turned on according to a driving condition of the vehicle; A fuel filter diagnosis apparatus for a vehicle including an engine warning light that is turned on under the control of the control unit and instructs to replace the fuel filter. The method of claim 1, wherein: And the control unit does not perform the negative pressure diagnosis of the fuel filter when the temperature of the fuel is equal to or less than a predetermined reference temperature. The method of claim 1, The controller counters the cumulative time and cumulative times of the engine warning light when the temperature of the fuel is higher than the set reference temperature, and warns the fuel filter to be replaced only when the cumulative time or cumulative number satisfies the reference condition. Diagnostic device. Determining whether to maintain a temperature higher than a reference temperature by detecting a temperature of the fuel when the engine is started; If the fuel temperature is less than or equal to the reference temperature, not performing the fuel filter diagnosis; and if the fuel temperature is greater than or equal to the reference temperature, entering a fuel filter diagnosis mode to detect negative pressure of the fuel discharged from the fuel filter; Counter-accumulating the elapsed time when the negative pressure of the fuel is detected to be greater than or equal to a reference pressure; Accumulating the lighting holding time and the number of lightings after the engine warning lamp is turned on when the elapsed time is equal to or greater than the set reference time; Determining whether a cumulative time or cumulative number of turning on of the engine warning light satisfies a set reference condition; And a step of guiding the replacement of the fuel filter and executing the lymph groove mode when either the cumulative time or the cumulative number of times satisfy the set reference condition. 5. The method of claim 4, And a reference temperature for determining whether to enter the diagnostic mode of the fuel filter is set to 37 ℃.
KR1020070068794A 2007-07-09 2007-07-09 Apparatus for diagnosis fuel filter in vehicle and method thereof KR101234630B1 (en)

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KR1020070068794A KR101234630B1 (en) 2007-07-09 2007-07-09 Apparatus for diagnosis fuel filter in vehicle and method thereof

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KR1020070068794A KR101234630B1 (en) 2007-07-09 2007-07-09 Apparatus for diagnosis fuel filter in vehicle and method thereof

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KR101234630B1 true KR101234630B1 (en) 2013-02-19

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR970057597U (en) * 1996-04-17 1997-11-10 Fuel pump and fuel filter abnormality warning device of car
JP2006063856A (en) 2004-08-26 2006-03-09 Toyota Motor Corp Fuel filter malfunction detection device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR970057597U (en) * 1996-04-17 1997-11-10 Fuel pump and fuel filter abnormality warning device of car
JP2006063856A (en) 2004-08-26 2006-03-09 Toyota Motor Corp Fuel filter malfunction detection device

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