KR200158556Y1 - Egr monitoring system using afs - Google Patents
Egr monitoring system using afs Download PDFInfo
- Publication number
- KR200158556Y1 KR200158556Y1 KR2019960058025U KR19960058025U KR200158556Y1 KR 200158556 Y1 KR200158556 Y1 KR 200158556Y1 KR 2019960058025 U KR2019960058025 U KR 2019960058025U KR 19960058025 U KR19960058025 U KR 19960058025U KR 200158556 Y1 KR200158556 Y1 KR 200158556Y1
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- South Korea
- Prior art keywords
- egr
- afs
- value
- present
- monitoring system
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Classifications
-
- 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
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/49—Detecting, diagnosing or indicating an abnormal function of the EGR system
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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
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0047—Controlling exhaust gas recirculation [EGR]
- F02D41/0065—Specific aspects of external EGR control
- F02D41/0072—Estimating, calculating or determining the EGR rate, amount or flow
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2306/00—Other features of vehicle sub-units
- B60Y2306/15—Failure diagnostics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2400/00—Special features of vehicle units
- B60Y2400/90—Driver alarms
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
본 고안은 AFS(Air Flow Sensor)를 이용한 EGR(배기가스 재순환장치) 모니터링 시스템에 관한 것이다.The present invention relates to an EGR (exhaust gas recirculation device) monitoring system using AFS (Air Flow Sensor).
이와 같은 본 고안은 EGR 모니터링 조건을 만족한 상태에서 AFS값을 일정시간 동안 적산하고, 적산된 AFS값이 엔진회전수, 공기량과 같은 설정변수 보다 적을 경우에는 EGR이 고장났음을 운전자에게 알려 주도록 함을 특징으로 한다.The present invention integrates the AFS value for a certain time while satisfying the EGR monitoring condition, and informs the driver that the EGR has failed when the accumulated AFS value is smaller than the set parameters such as the engine speed and air volume. It is characterized by.
Description
본 고안은 AFS(Air Flow Sensor)를 이용한 EGR(배기가스 재순환장치) 모니터링 시스템에 관한 것이다.The present invention relates to an EGR (exhaust gas recirculation device) monitoring system using AFS (Air Flow Sensor).
일반적으로 EGR은 흡기계통으로 배기가스의 일부를 재순환시켜서 연소할때의 최고온도를 낮추어 NOx의 발생을 억제하는 것이며, 일반적으로 NOx의 발생이 적은 공회전시나 또는 고속운전시에는 작동하지 않토록 되어 있다.In general, EGR recirculates a part of the exhaust gas through the intake system to reduce the maximum temperature during combustion to suppress the generation of NOx. In general, EGR does not operate during idling or high speed operation where NOx is generated less. .
이와 같은 종래 EGR에 있어서 EGR이 고장이 날 경우에는 배기가스중 NOx의 생성량이 많이 발생하여 대기오염을 유발시키게 되는데, 상기 EGR 고장유무를 운전자가 확인할 수 없어 NOx의 발생억제를 수행할 수 없었다.In the conventional EGR, when the EGR breaks down, a large amount of NOx is generated in the exhaust gas, which causes air pollution.
본 고안은 상기한 종래 기술의 문제점을 해소하기 위하여 EGR 모니터링 조건을 만족한 상태에서 적산시킨 AFS값을 설정변수와 비교하여 그 값이 적으면 EGR 고장임을 운전자에게 확인시켜 주도록 함으로써 EGR 고장 유무를 용이하게 확인할 수 있도록 하기 위한 것이다.The present invention compares the AFS value accumulated in the state that satisfies the EGR monitoring condition with the setting variable to solve the above-mentioned problems of the prior art, and if the value is small, the driver can confirm that the EGR failure is easy. This is to make sure that.
상기한 과제를 달성하기 위한 본 고안은 EGR 모니터링 조건을 만족한 상태에서 AFS값을 일정시간 동안 적산하고, 적산된 AFS값이 엔진회전수, 공기량과 같은 설정변수 보다 적을 경우에는 EGR이 고장났음을 운전자에게 알려 주도록 함을 특징으로 한다.The present invention for achieving the above object is to integrate the AFS value for a certain time while satisfying the EGR monitoring conditions, and when the accumulated AFS value is less than the set parameters such as the engine speed and air volume, the EGR has failed. It is characterized by letting the driver know.
제1도는 본 고안을 설명하기 위한 AFS의 설치 상태도.Figure 1 is an installation state diagram of AFS to illustrate the present invention.
제2도는 본 고안을 설명하기 위한 AFS와 회전수간의 관계 그래프.Figure 2 is a graph of the relationship between the AFS and rotation speed for explaining the present invention.
제3도는 본 고안의 플로우챠트.3 is a flowchart of the present invention.
제4도는 제3도에 적용되는 설정변수 그래프.4 is a graph of setting variables applied to FIG.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 이그조스트 매니폴드 2 : 서지탱크1: Exg manifold 2: Surge tank
3 : EGR파이프 4 : EGR밸브3: EGR pipe 4: EGR valve
5 : 스로틀 바디 6 : AFS5: Throttle Body 6: AFS
제1도는 본 고안을 설명하기 위한 AFS의 설치상태도이다.1 is an installation state diagram of the AFS to explain the present invention.
상기 제1도에 의하면 이그조스트 매니폴드(1)와 서지탱크(2)를 연결하는 EGR파이프(3)에 EGR밸브(4)가 설치되고, 스로틀 바디(5)와 에어 크리너사이에 AFS(6)가 설치된다.According to FIG. 1, an EGR valve 4 is installed in an EGR pipe 3 connecting the exhaust manifold 1 and the surge tank 2, and an AFS (AFS) is provided between the throttle body 5 and the air cleaner. 6) is installed.
그리고 제2도는 AFS(6)와 엔진회전수간의 관계그래프로서, EGR작동시 엔진콘트롤 유니트로 입력되는 AFS(6)의 공기량 값이 EGR가스의 역류로 인해 EGR 비작동시보다 적은 공기량을 감지함을 보여주는 것이고, 본 고안은 이와 같은 원리를 이용하여 후술하는 제3도의 플로우 챠트와 같이 EGR을 모니터링 하는 것이다.2 is a relation graph between the AFS 6 and the engine speed, and the air volume value of the AFS 6 input to the engine control unit during the EGR operation detects less air volume than the non-EGR operation due to the backflow of the EGR gas. The present invention is to monitor the EGR as shown in the flow chart of Figure 3 to be described later using this principle.
제3도는 본 고안을 설명하기 위한 플로우 챠트로서, EGR모니터링 조건을 만족하는지를 판단하는 과정(S1)과, 상기 과정(S1)에서 EGR 모니터링 조건이 만족되면 AFS값을 일정시간동안 적산하게 하는 과정(S2)과, 상기 과정(S2)에서 얻어진 적산된 AFS값을 설정변수와 비교하는 단계(S3)와, 상기 단계(S3)에서 AFS값이 설정변수값보다 적을 경우에는 EGR을 고장으로 판단하는 단계(S4)와, 상기 단계(S4)에서 EGR이 고장이면 경고표시 등을 점등케하고, 고장코드를 기억케하는 단계(S5)와로 이루어진다.3 is a flow chart for explaining the present invention, which determines whether the EGR monitoring condition is satisfied (S 1 ), and when the EGR monitoring condition is satisfied in the step (S 1 ), the AFS value is accumulated for a predetermined time. In step S 2 , comparing the integrated AFS value obtained in step S 2 with the setting variable S 3 , and in the step S 3 , when the AFS value is smaller than the setting variable value, EGR the step of determining a failure takes place (S 4), and a step (S 5), which is the EGR failure from the step (S 4) and a warning indicator light Ke, Ke storing the fault code waro.
상기에 있어서, 과정(S1)의 EGR 모니터링 조건은 아이들(Idle)이 오프상태에서In the above, the EGR monitoring condition of the process (S 1 ) is the idle state (Idle) off
첫째, 설정치 1 냉각수온 설정치 2First, setpoint 1 coolant temperature setpoint 2
둘째, 설정치 3 엔진 rpm 설정치 4Second, setpoint 3 engine rpm setpoint 4
셋째, 설정치 5 공기량(AFS) 설정치 6으로 한다.Third, set value 5 is set to air quantity (AFS) set value 6.
또한 상기과정(S2)에서의 적산된 AFS값은AFSi 이고, 상기과정(S3)에서의 설정변수(rpm과 공기량과의 관계)는 제4도에 도시한 바와 같다.In addition, the integrated AFS value in the process (S2) is AFSi, and the setting variable (relationship between rpm and air volume) in the step S3 is shown in FIG.
이와 같은 본 고안은 EGR 모니터링 조건이 만족되는지를 판단하여 감지된 공기량 값을 일정시간동안 적산하고, 적산된 공기량 값을 엔진회전수와 공기량 관계에서 얻어진 설정변수와 비교하여 적산된 공기량이 상기 설정변수 값보다 적으면 EGR이 고장난 것임을 경고등으로 운전자에게 알려주게 되는 것이다.The present invention is to determine whether the EGR monitoring conditions are satisfied to integrate the detected air amount value for a certain time, and the accumulated air amount by comparing the accumulated air amount value with the setting variable obtained in the relationship between the engine speed and the air volume, the set variable If it is less than the value, the driver will be warned that the EGR has failed.
즉, EGR 가스의 역류로 인해 EGR 작동시에 엔진콘트롤 유니트에 입력되는 공기량값이 제2도와 같이 EGR 비작동시보다 적은 공기량값으로 입력되면 EGR이 고장나게 되는데 이를 엔진콘트롤 유니트에서 감지하여 EGR 고장으로 판단케 하는 것이다.In other words, if the air volume value input to the engine control unit during the EGR operation due to the reverse flow of the EGR gas is input to the air volume value less than the non-operation of the EGR as shown in FIG. 2, the EGR will fail. To judge.
이상과 같이 본 고안은 EGR이 고장이 나면 즉시 운전자에게 경고등으로 알려주게 함으로써 배기가스의 대기 방출에 대한 대비를 미연에 방지할 수 있게 되는 것이다.As described above, the present invention enables the driver to immediately notify the driver by a warning light when the EGR is broken, thereby preventing the preparation of the exhaust gas to the atmosphere.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019960058025U KR200158556Y1 (en) | 1996-12-27 | 1996-12-27 | Egr monitoring system using afs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019960058025U KR200158556Y1 (en) | 1996-12-27 | 1996-12-27 | Egr monitoring system using afs |
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| Publication Number | Publication Date |
|---|---|
| KR19980044887U KR19980044887U (en) | 1998-09-25 |
| KR200158556Y1 true KR200158556Y1 (en) | 1999-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR2019960058025U KR200158556Y1 (en) | 1996-12-27 | 1996-12-27 | Egr monitoring system using afs |
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| KR (1) | KR200158556Y1 (en) |
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1996
- 1996-12-27 KR KR2019960058025U patent/KR200158556Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
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| KR19980044887U (en) | 1998-09-25 |
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