KR101338600B1 - Apparatus and method for diagnosing fail of injector - Google Patents

Apparatus and method for diagnosing fail of injector Download PDF

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Publication number
KR101338600B1
KR101338600B1 KR1020070131421A KR20070131421A KR101338600B1 KR 101338600 B1 KR101338600 B1 KR 101338600B1 KR 1020070131421 A KR1020070131421 A KR 1020070131421A KR 20070131421 A KR20070131421 A KR 20070131421A KR 101338600 B1 KR101338600 B1 KR 101338600B1
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South Korea
Prior art keywords
injector
unit
nozzle
predetermined time
abnormality
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KR1020070131421A
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Korean (ko)
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KR20090063897A (en
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양대원
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현대자동차주식회사
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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)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)

Abstract

The present invention relates to an apparatus and method for detecting an abnormality of an injector, wherein the fuel of the injector unit is turned on or off from the sensing unit after turning on / off at least one nozzle for a predetermined time according to the injector abnormality detection signal. By receiving the pressure and displaying the abnormal information of the injector unit when the fuel pressure drop does not occur in the injector unit, it is possible to detect the abnormality of the injector without a separate information communication device, thereby improving the reliability of the engine. .

Injector

Description

Injector abnormality detection device and method {APPARATUS AND METHOD FOR DIAGNOSING FAIL OF INJECTOR}

The present invention relates to an apparatus and method for detecting injector abnormality.

In general, a Single Point Injection (SPI) Compressed Natural Gas (CNG) engine injects fuel using a fuel metering valve (FMV).

Here, the fuel valve is a device for adjusting the amount of natural gas (CNG) fuel entering the engine by the injector assembly (assy) made by mounting six to twelve injectors in one block according to the engine displacement.

In addition, when the fuel metering valve injector nozzle is clogged due to a foreign substance in the fuel, an injector cleaning mode, which is a mode for cleaning the injector, causes the electronic control unit to drive the injector at the time of the engine, thereby driving natural gas. The pressure of the fuel removes this material from the injector nozzle.

In addition, in order to check for clogging or failure of the injectors of the fuel metering valve, the engine RPM variation of the engine is measured by turning off the injectors one by one through the injector killing test. Check the injector for abnormalities.

However, in the related art, in order to check whether the injector nozzles are clogged or to execute the injector cleaning mode, a separate device such as an information communication terminal (eg, a notebook, a high scan, etc.) capable of communicating with the electronic controller is required.

In addition, in order to check which of the various injectors of the fuel metering valve is clogged or broken, it is troublesome to communicate with the electronic controller and perform an injector killing test.

The present invention relates to an injector abnormality detection apparatus and method for checking the abnormality of the injector without a separate information communication device.

The present invention includes the steps of receiving an injector abnormality detection signal, turning on / off at least one nozzle for a predetermined time by the injector abnormality detection signal, and according to the at least one nozzle is turned on / off Sensing the fuel pressure of the injector unit and displaying an abnormality of the injector unit when a drop does not occur in the fuel pressure of the injector unit.

The present invention can check whether there is an abnormality of the injector without a separate information communication device for communicating with the control unit and accordingly injector cleaning can be performed.

In addition, the present invention can perform the cleaning for the injector without a separate information communication device to improve the durability of the injector, it is possible to improve the reliability of the engine.

The present invention includes a keypad for applying an injector abnormality detection signal, at least one nozzle, an injector for turning on / off at least one nozzle for a predetermined time according to a control signal, and the control signal according to the present invention. A display unit for displaying an abnormality of the injector unit, an injector detecting unit for detecting fuel pressure of the injector unit according to at least one nozzle being turned on, and the at least one nozzle being turned on for a predetermined time according to the injector abnormality detection signal And a control unit configured to receive the fuel pressure of the injector unit from the detection unit after turning on / off and to apply an abnormal control signal of the injector unit to the display unit when a drop in the fuel pressure does not occur.

In the present invention, the control unit is configured to display at least a predetermined time interval through the display unit to correspond to at least one or more nozzles in which the fuel pressure drop of the injector unit does not occur as the nozzle is turned on / off, and then after another predetermined time. Displays at predetermined time intervals corresponding to the nozzles.

Further, in the present invention, the control unit applies the abnormal control signal of the injector to the display unit, performs cleaning on the nozzle of the injector unit, and also displays the injector cleaning mode through the display unit.

Further, in the present invention, the control unit receives the fuel pressure of the injector unit from the sensing unit after the on / off of the at least one nozzle for a predetermined time and the fuel injector to the display unit when the fuel pressure does not occur Apply a negative abnormal control signal.

Also, in the present invention, the control unit performs the cleaning signal of the injector unit of the keypad unit.

In the present invention, the predetermined time is 4 to 5 seconds, and after the predetermined time is 2 to 4 seconds.

In addition, the present invention comprises the steps of receiving an injector abnormality detection signal, the step of turning on or off at least one or more nozzles of the injector unit for a predetermined time by the injector abnormality detection signal, and the at least one nozzle on / off And detecting a fuel pressure of the injector unit, and displaying an abnormality of the injector unit when a drop does not occur in the fuel pressure of the injector unit.

In the displaying of the abnormality of the injector in the present invention, the nozzle is displayed at predetermined time intervals through the display unit so as to correspond to at least one or more nozzles in which the fuel pressure drop does not occur as the on / off of the injector. After that, the display is displayed at predetermined time intervals corresponding to other nozzles after a predetermined time.

The method may further include performing cleaning on the injector unit after displaying the abnormality in the injector unit.

In addition, after the step of performing the cleaning in the present invention, comprising the step of displaying the cleaning mode of the injector unit.

The method may further include displaying an abnormality of the injector unit when the at least one nozzle is turned on / off for a predetermined time and receives a fuel pressure of the injector unit from the sensing unit so that the drop of the fuel pressure does not occur. It further includes.

The cleaning of the injector unit is performed according to the cleaning signal of the injector unit.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

Example

1 is a block diagram illustrating an apparatus for detecting an abnormality of an injector according to the present invention.

As shown in FIG. 1, the injector abnormality detection device 100 includes a keypad 102, a start on / off switch unit 104, a display unit 106, an injector detection unit 107, and an injector unit 108. ) And the control unit 110.

First, the key pad unit 102 applies an abnormality detection signal of the injector unit 108 or a cleaning signal of the injector unit 108 to the controller 110 according to a user's operation, and then starts the on / off switch unit 104. ) Applies a start-on signal to the control unit 110 as the start key is moved to the start-on (ie, IG) position by the user, and the display unit 106 injects the 108 in accordance with the control signal. The abnormality or the cleaning mode of the injector unit 108 is displayed, and the injector detecting unit 107 detects the fuel pressure of the injector unit 108 when at least one nozzle is turned on.

Meanwhile, the controller 110 sequentially turns on / off the nozzles of the at least one injector unit 108 for a predetermined time in response to the abnormality detection signal of the injector unit 108 of the keypad 102, and accordingly When the fuel pressure of the injector unit 108 is received from the injector detecting unit 107 to check whether the fuel pressure drop occurs in the injector unit 108, and when the fuel pressure drop does not occur in the injector unit 108. The abnormal control signal of the injector unit 108 is applied to the display unit 106.

In addition, the controller 110 performs cleaning on the nozzles of the at least one injector unit 108 according to the cleaning signal of the injector unit 108 of the keypad 102, and then again, the at least one or more injector unit 108. After sequentially turning on / off the nozzles for a predetermined time, the fuel pressure of the injector unit 108 is received from the injector detecting unit 107 accordingly to check whether the fuel pressure drop occurs in the injector unit 108, and the injector When the fuel pressure drop does not occur in the unit 108, the abnormal control signal of the injector unit 108 is applied to the display unit 106.

Here, the cleaning of the nozzles of the at least one injector unit 108 is performed on the nozzles of the injector unit 108 sequentially for a predetermined time, for example, for a predetermined time of 4 to 6 seconds according to the control signal of the controller 110. The cleaning is performed by turning on / off the fuel pressure of the injector unit 108.

In addition, the controller 110 may provide information corresponding to an abnormal nozzle at a predetermined time interval, for example, when there is an abnormality of at least one nozzle in which the fuel pressure drop of the injector unit 108 does not occur as the nozzle is turned on / off. After display by the display unit 106 at a predetermined time interval of 2 to 4 seconds, information corresponding to a nozzle that is longer than a predetermined time (for example, 1 to 3 seconds) is displayed at a predetermined time interval. To display.

2 is a flowchart illustrating a method of detecting an injector abnormality according to the present invention.

As shown in FIG. 2, in the injector abnormality diagnosis apparatus 100, when the oxygen detector detects the oxygen concentration of the fuel and measures the amount of fuel actually injected, the controller 110 detects the oxygen detector. After correcting the fuel amount by calculating the difference between the fuel amount and the predetermined target amount, the corrected fuel amount information is stored in the storage means.

Thus, when at least one nozzle of the injector unit 108 is clogged, the injected fuel amount becomes small, and thus the corrected fuel amount becomes large.

 The start on / off switching unit 104 applies a key on (ie, IG state) signal to the controller 110 to detect an abnormality of the injector unit 108 by a user's operation, The pad unit 102 applies an injector abnormality detection signal to the controller 110 by a user's manipulation.

Here, the key on signal is a signal of a start On position (that is, an IG state) before the start of the vehicle is started.

At this time, the control unit 110 receives an injector abnormality detection signal from the keypad 102 (S200), and the control signal for sequentially turning on / off at least one injector nozzle to the injector 108 for a predetermined time. Apply.

Accordingly, the injector nozzles of the injector unit 108 are sequentially turned on / off for a predetermined time in accordance with the control signal of the control unit 110 (S201).

Herein, the predetermined time is preferably 4 to 6 seconds.

In addition, when the control unit 110 applies a control signal for detecting the fuel pressure of the injector unit 108 to the injector detecting unit 107, the injector detecting unit 107 may be configured as at least one injector nozzle is turned on / off. The fuel pressure of the injector unit 108 is sensed and applied to the control unit 110.

Thus, the control unit 110 receives fuel pressure information corresponding to at least one injector nozzle is turned on from the injector detecting unit 107 (S202) and confirms the drop of the fuel pressure (S203).

If there is no drop in fuel pressure as a result of the check in step S203, the controller 110 recognizes that there is an abnormality in at least one or more injector nozzles, and applies the abnormal control signal to the display unit 106 accordingly. .

At this time, the display unit 106 displays the abnormality information corresponding to the abnormality of the injector unit 108, that is, the nozzle of the abnormal injector unit 108 according to the abnormality control signal of the controller 110 (S204).

In detail, when the nozzle of the abnormal injector unit 108 is four times, four times are displayed at predetermined time intervals, for example, 2 to 4 seconds, and the nozzles of the third and sixth injector units 108 are abnormal. In this case, three times are displayed at a predetermined time, for example, 2 to 4 seconds, and then six times are displayed at a predetermined time (for example, 2 to 4) after a predetermined time (for example, 1 to 3 seconds).

In this state, when the control unit 110 receives the injector cleaning signal from the key pad unit 102, the control unit 110 turns on / off the injector nozzle of the injector unit 108 to remove foreign substances in the injector nozzle by the pressure of the fuel. It performs (S205).

Thereafter, the controller 110 displays the injector cleaning mode through the display 106.

In addition, even when the injector unit 108 is cleaned several times, when the injector abnormality information is displayed on the display unit 106, the injector unit 108 prints that there is an abnormality and the injector unit 108 at an appropriate time. Can be replaced to improve the reliability of the engine.

If there is a drop in fuel pressure as a result of the check in the above step (S203), the controller 110 recognizes that there is no abnormality for at least one or more injector nozzles and accordingly applies a no abnormality control signal to the display unit 106. In operation S206, the display unit 106 displays no abnormality of the injector.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

1 is a block diagram showing an injector abnormality detection apparatus according to the present invention.

Figure 2 is a flow chart for explaining the injector abnormality detection method according to the present invention.

Description of the Related Art

100: Injector abnormality detection device 102: Key pad part

104: start on / off switch unit 106: display unit

107: injector detection unit 108: injector unit

110:

Claims (15)

A keypad for applying an injector abnormality detection signal; An injector unit including at least one nozzle and turning on / off at least one nozzle for a predetermined time according to a control signal; A display unit for displaying an abnormality of the injector unit according to a control signal; An injector detecting unit detecting a fuel pressure of the injector unit when at least one nozzle is turned on; The abnormality control of the injector unit when the at least one nozzle is turned on / off for a predetermined time according to the injector abnormality detection signal and receives the fuel pressure from the injector unit from the detection unit so that the drop of the fuel pressure does not occur. A control unit for applying a signal to the display unit; Including an oxygen detector for detecting the oxygen concentration of the fuel injected from the injector to measure the amount of fuel actually injected, And the controller is configured to calculate corrected fuel amount information for determining whether the injector is abnormal based on a difference between the fuel amount detected by the oxygen detector and a preset fuel amount. The method of claim 1, The control unit After the nozzle is displayed at predetermined time intervals through the display unit corresponding to at least one or more nozzles in which the fuel pressure drop of the injector unit does not occur as the nozzle is turned on / off, the nozzle is predetermined to correspond to another nozzle after a predetermined time. Injector abnormality detection device that displays at intervals. The method of claim 1, The control unit And an injector abnormality detection device configured to apply the abnormal control signal of the injector unit to the display unit, perform cleaning on the nozzle of the injector unit, and display the injector cleaning mode through the display unit. The method of claim 3, The control unit An injector which applies the abnormal control signal of the injector unit to the display unit when the at least one nozzle is turned on / off for a predetermined time and receives the fuel pressure from the injector unit from the sensing unit so that the fuel pressure does not drop. Abnormality detection device. 5. The method of claim 4, The control unit And an injector abnormality detection device performed according to a cleaning signal of the injector unit of the keypad unit. The method according to claim 1 or 4, Injector abnormality detection device for 4 to 5 seconds during the predetermined time. 3. The method of claim 2, Injector abnormality detection device to the 2 to 4 seconds after the predetermined time. Receiving an injector abnormality detection signal; Turning on / off at least one nozzle of the injector unit for a predetermined time by the injector abnormality detection signal; Detecting fuel pressure of the injector unit as the at least one nozzle is turned on / off; Displaying an abnormality of the injector unit when no drop occurs in the fuel pressure of the injector unit, The injector abnormality detection signal is generated based on a reference fuel amount preset in the injector unit, The reference fuel amount is corrected based on the difference between the actual injected fuel amount and the reference fuel amount measured by the oxygen sensing unit, And detecting the oxygen concentration of the injected fuel to measure the amount of fuel actually injected. 9. The method of claim 8, In displaying the abnormality of the injector unit, After the nozzle is displayed at a predetermined time interval through the display unit corresponding to at least one or more nozzles in which the fuel pressure drop does not occur as the nozzle is turned on / off, the predetermined time interval is corresponding to another nozzle after a predetermined time. How to detect abnormal injectors displayed by 9. The method of claim 8, After displaying the abnormality of the injector part, Injector abnormality detection method further comprises the step of performing a cleaning for the injector. The method of claim 10, After the step of performing the cleaning, And detecting the cleaning mode of the injector unit. 12. The method of claim 11, Injector abnormality further comprising the step of receiving the fuel pressure of the injector unit from the sensing unit after the on / off of the at least one nozzle for a predetermined time and if the drop of the fuel pressure does not occur Presence detection method. 9. The method of claim 8, The predetermined time is 4 to 5 seconds injector abnormality detection method. 10. The method of claim 9, After the predetermined time is 2 to 4 seconds injector abnormality detection method. The method of claim 10, And detecting the abnormality of the injector according to the cleaning signal of the injector.
KR1020070131421A 2007-12-14 2007-12-14 Apparatus and method for diagnosing fail of injector KR101338600B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20230064125A (en) * 2021-11-03 2023-05-10 주식회사 현대케피코 Apparatus and method for detecting opening time of injection nozzle of injector

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101051764B1 (en) * 2009-11-26 2011-07-25 주식회사 케피코 Diagnosis and diagnosis method of injector clogging of gasoline engine
KR102552084B1 (en) 2018-10-08 2023-07-06 현대자동차주식회사 Method for Injector Injection Error Diagnosis using Diagnostic Inrush Condition and System Thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200423864Y1 (en) * 2006-05-11 2006-08-11 신종활 Injector tester
KR100784306B1 (en) * 2007-03-12 2007-12-13 남기성 Injector testing device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200423864Y1 (en) * 2006-05-11 2006-08-11 신종활 Injector tester
KR100784306B1 (en) * 2007-03-12 2007-12-13 남기성 Injector testing device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20230064125A (en) * 2021-11-03 2023-05-10 주식회사 현대케피코 Apparatus and method for detecting opening time of injection nozzle of injector
KR102541073B1 (en) 2021-11-03 2023-06-08 주식회사 현대케피코 Apparatus and method for detecting opening time of injection nozzle of injector

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