KR20120131889A - Diagnosis device of troubling injector for electronic control diesel engine - Google Patents
Diagnosis device of troubling injector for electronic control diesel engine Download PDFInfo
- Publication number
- KR20120131889A KR20120131889A KR1020110050372A KR20110050372A KR20120131889A KR 20120131889 A KR20120131889 A KR 20120131889A KR 1020110050372 A KR1020110050372 A KR 1020110050372A KR 20110050372 A KR20110050372 A KR 20110050372A KR 20120131889 A KR20120131889 A KR 20120131889A
- Authority
- KR
- South Korea
- Prior art keywords
- injector
- fuel
- flow rate
- diesel engine
- electronically controlled
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D41/221—Safety or indicating devices for abnormal conditions relating to the failure of actuators or electrically driven elements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/228—Warning displays
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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)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
The present invention relates to an injector failure diagnosis apparatus for an electronically controlled diesel engine, and more particularly, when the flow rate of the fuel returned through the fuel return line is increased when one or more of the injectors are defective, the injector failure is detected in real time. A fuel flow meter is provided on the fuel return line for diagnosis, and a calculation unit for comparing the set reference flow value and the measured flow rate value measured by the fuel flow meter to determine whether the injector is malfunctioning is used as a stand-alone injector. The present invention relates to an injector failure diagnosis device of an electronically controlled diesel engine that can protect a vehicle system by preventing a performance degradation of a vehicle and inducing a quick maintenance.
An injector failure diagnosis apparatus for an electronically controlled diesel engine according to the present invention includes: a fuel flow meter installed at an injector fuel return line of an electronically controlled diesel engine to measure a flow rate of fuel returned through the fuel return line; A calculating unit which compares the set reference flow rate value with the measured flow rate value measured by the fuel flow meter to determine whether the injector is broken or not; .
Description
The present invention relates to an injector failure diagnosis apparatus for an electronically controlled diesel engine, and more particularly, when the flow rate of the fuel returned through the fuel return line is increased when one or more of the injectors are defective, the injector failure is detected in real time. A fuel flow meter is provided on the fuel return line for diagnosis, and a calculation unit for comparing the set reference flow value and the measured flow rate value measured by the fuel flow meter to determine whether the injector is malfunctioning is used as a stand-alone injector. The present invention relates to an injector failure diagnosis device of an electronically controlled diesel engine that can protect a vehicle system by preventing a performance degradation of a vehicle and inducing a quick maintenance.
As is well known, an automobile engine is a device that generates power by supplying air and fuel in a cylinder and burning it.
The fuel is supplied to the cylinder by injecting fuel by an injector controlled by an electronic control unit (ECU).
When the performance of the injector is deteriorated, there are phenomena such as start-up failure, start-up delay, lack of output, excessive smoke, engine relief, and the like, and an apparatus and method for diagnosing the injector failure are required.
In the related art, a dynamic test and a static test were performed to diagnose the injector failure, which has a problem that a lot of time and cost exist.
That is, in the prior art, it is difficult for the driver to determine whether the injector is broken, and only when the car has an abnormal symptom occurs, the repair shop is visited. In order to determine the failure of the injector by determining whether the injector is broken by attaching a separate device to each injector, the experiment was a problem of wasting unnecessary time and money. However, even if it is determined that the injector is broken through experiments, there is a problem that it is not a method of confirming the injector failure in advance.
The present invention has been made to solve the problems of the prior art as described above, the object of the present invention is to focus on the fact that the flow rate of the fuel returned through the fuel return line when one or more of the injector is defective, the failure of the injector A fuel flowmeter is provided on the fuel return line to diagnose the fuel in real time, and a calculation unit which compares the set reference flow value and the measured flow value measured by the fuel flow meter to determine whether the injector is broken or not has failed. The present invention provides an injector failure diagnosis device for an electronically controlled diesel engine that can protect a vehicle system by preventing a performance degradation of a vehicle caused by neglect and inducing a quick maintenance.
In order to achieve the above object, an injector failure diagnosis apparatus for an electronically controlled diesel engine according to the present invention is installed in an injector fuel return line of an electronically controlled diesel engine to measure a flow rate of fuel returned through the fuel return line. Wow; A calculating unit which compares the set reference flow rate value with the measured flow rate value measured by the fuel flow meter to determine whether the injector is broken or not; .
In addition, in the injector failure diagnosis apparatus for an electronically controlled diesel engine according to the present invention, the calculation unit is set to the flow rate of the fuel returned through the fuel return line in the normal state, the reference flow rate value The allowable flow rate value is set to be larger than the reference flow rate value, and the injector is determined to be in a failure when the measured flow rate value measured by the fuel flow meter exceeds the allowable flow rate value.
In addition, the injector failure diagnosis apparatus for an electronically controlled diesel engine according to the present invention, the alarm unit that can be visually or audibly informed to the user when the injector is determined to be a failure; And further comprising:
By the above configuration, the injector failure diagnosis apparatus of the electronically controlled diesel engine according to the present invention can diagnose the injector in real time and determine whether there is a failure, thereby causing nozzle tip wear of the electronically controlled diesel engine injector, scratching of the nozzle needle, It is possible to prevent and maintain phenomena such as starting failure, starting delay, lack of output, excessive smoke, engine insufficiency caused by injector deterioration caused by poor sealing of valve ball due to wear of control valve, injector internal failure, etc. It can protect the system of the car, prevent the failure of the injector as well as other parts, minimize the fuel waste, and can make self-judgment, which can save time and cost for maintenance.
1 is a block diagram of an injector failure diagnosis apparatus for an electronically controlled diesel engine according to an embodiment of the present invention.
Figure 2 is a graph showing the flow rate of the fuel returned through the fuel return line in the injector failure diagnosis apparatus of the electronically controlled diesel engine according to an embodiment of the present invention
Hereinafter, an injector failure diagnosis apparatus for an electronically controlled diesel engine according to the present invention will be described in detail with reference to the embodiment shown in the drawings.
1 is a block diagram of an injector failure diagnosis apparatus of an electronically controlled diesel engine according to an embodiment of the present invention, Figure 2 is a fuel return line in the injector failure diagnosis apparatus of an electronically controlled diesel engine according to an embodiment of the present invention. A graph showing the flow rate of fuel returned through.
Referring to the drawings, the injector failure diagnosis apparatus for an electronically controlled diesel engine according to an embodiment of the present invention includes a fuel flow meter 10, a calculation unit 20, and an alarm unit 30.
In general, the fuel in the electronically controlled diesel engine is introduced into the injector through the low pressure pump, the fuel filter, the high pressure pump, and the common rail sequentially from the fuel tank through the fuel low pressure line and the fuel high pressure line, as shown in FIG. Fuel injected into the furnace is injected into the cylinder for combustion. On the other hand, the fuel remaining without being injected into the cylinder has a structure that is recovered to the fuel tank through a fuel return line.
In the embodiment of the present invention, as shown in FIG. 1, four injectors are illustrated as an example of a four-cylinder engine. In this case, when one or more of the injectors is defective, that is, injection of fuel into the cylinder through the injector is sufficient. If not, the flow rate of the fuel returned to the fuel return line is increased as shown in FIG.
The fuel flow meter 10 is installed in the injector fuel return line of the electronically controlled diesel engine to use the relationship between the abnormality of the injector and the flow rate of the fuel returned to the fuel return line in the diagnostic apparatus according to the present invention. The return line measures the flow rate of fuel returned this year. On the other hand, the measured flow rate value measured in the fuel flow meter 10 is transmitted to the calculation unit 20 through a sensor line.
The operation unit 20 is configured to determine whether there is a failure of the injector by comparing the set reference flow value and the measured flow rate value measured by the fuel flow meter to the electronic control unit (ECU) of the vehicle. It is preferable to comprise so that it may serve as (20).
On the other hand, the calculation unit 20 is set to the flow rate of the fuel returned through the fuel return line in the normal state as shown in Figure 2, the reference flow rate value than the reference flow rate value The allowable flow rate value is largely set, and is configured to determine that the injector is faulty when the measured flow rate value measured by the fuel flow meter exceeds the allowable flow rate value.
The alarm unit 30 is a method of turning on the engine check warning light on the instrument panel of the vehicle so that the driver of the vehicle can be easily recognized in a configuration that informs the user visually or acoustically when the injector is determined to be a failure in the operation unit. It is preferable to configure so that an abnormality of an injector can be reported.
The injector failure diagnosis apparatus of the electronically controlled diesel engine according to the present invention is capable of diagnosing the injector in real time and determining whether there is a failure by the organic coupling relationship of the components as described above. By preventing degradation and inducing quick maintenance, the car system can be protected.
The injector failure diagnosis apparatus of the electronically controlled diesel engine described above and illustrated in the drawings is only one embodiment for implementing the present invention, and should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is defined only by the matters set forth in the claims below, and the embodiments which have been improved and changed without departing from the gist of the present invention will be apparent to those skilled in the art. It will be said to belong to the protection scope of the present invention.
10 fuel flow meter
20 calculator
30 alarms
Claims (3)
A calculating unit which compares the set reference flow rate value with the measured flow rate value measured by the fuel flow meter to determine whether the injector is broken or not; Injector failure diagnosis apparatus for an electronically controlled diesel engine comprising a.
The calculation unit, the reference flow rate is set to the flow rate of the fuel returned through the fuel return line in the normal state, the allowable flow rate value is set larger than the reference flow rate value based on the reference flow rate value, the fuel Injector failure diagnosis apparatus for an electronically controlled diesel engine, characterized in that it is determined that the injector is a failure when the measured flow rate value measured in the flow meter exceeds the allowable flow rate value.
An alarm unit for notifying the user visually or auditoryly when it is determined that the injector is broken by the operation unit; Injector failure diagnosis device for an electronically controlled diesel engine further comprising.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020110050372A KR20120131889A (en) | 2011-05-26 | 2011-05-26 | Diagnosis device of troubling injector for electronic control diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020110050372A KR20120131889A (en) | 2011-05-26 | 2011-05-26 | Diagnosis device of troubling injector for electronic control diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20120131889A true KR20120131889A (en) | 2012-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020110050372A KR20120131889A (en) | 2011-05-26 | 2011-05-26 | Diagnosis device of troubling injector for electronic control diesel engine |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321809A (en) * | 2013-07-08 | 2013-09-25 | 潍柴动力股份有限公司 | Oil injector fault checking method and device |
| CN103557106A (en) * | 2013-11-18 | 2014-02-05 | 沈阳黎明航空发动机(集团)有限责任公司 | Oil injecting ring flow testing device and use method thereof |
| KR20180120960A (en) * | 2017-04-28 | 2018-11-07 | 현대자동차주식회사 | Fuel injection closed loop control system of injector, and method of that |
| KR20180124231A (en) * | 2017-05-11 | 2018-11-21 | 현대자동차주식회사 | Dignosis system and method for fuel injector |
| RU2672992C1 (en) * | 2017-06-07 | 2018-11-21 | федеральное государственное бюджетное образовательное учреждение высшего образования "Иркутский национальный исследовательский технический университет" (ФГБОУ ВО "ИРНИТУ") | Method for testing devices of high-pressure of diesel fuel system on working engine and device for implementation thereof |
-
2011
- 2011-05-26 KR KR1020110050372A patent/KR20120131889A/en active Search and Examination
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321809A (en) * | 2013-07-08 | 2013-09-25 | 潍柴动力股份有限公司 | Oil injector fault checking method and device |
| CN103321809B (en) * | 2013-07-08 | 2015-07-08 | 潍柴动力股份有限公司 | Oil injector fault checking method and device |
| CN103557106A (en) * | 2013-11-18 | 2014-02-05 | 沈阳黎明航空发动机(集团)有限责任公司 | Oil injecting ring flow testing device and use method thereof |
| KR20180120960A (en) * | 2017-04-28 | 2018-11-07 | 현대자동차주식회사 | Fuel injection closed loop control system of injector, and method of that |
| KR20180124231A (en) * | 2017-05-11 | 2018-11-21 | 현대자동차주식회사 | Dignosis system and method for fuel injector |
| RU2672992C1 (en) * | 2017-06-07 | 2018-11-21 | федеральное государственное бюджетное образовательное учреждение высшего образования "Иркутский национальный исследовательский технический университет" (ФГБОУ ВО "ИРНИТУ") | Method for testing devices of high-pressure of diesel fuel system on working engine and device for implementation thereof |
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