KR100188582B1 - Uncommon diagnosis device of a secondary air system - Google Patents
Uncommon diagnosis device of a secondary air system Download PDFInfo
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- KR100188582B1 KR100188582B1 KR1019960069078A KR19960069078A KR100188582B1 KR 100188582 B1 KR100188582 B1 KR 100188582B1 KR 1019960069078 A KR1019960069078 A KR 1019960069078A KR 19960069078 A KR19960069078 A KR 19960069078A KR 100188582 B1 KR100188582 B1 KR 100188582B1
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- secondary air
- combination valve
- exhaust
- present
- air system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
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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 After Treatment (AREA)
Abstract
본 발명은 2차 에어시스템의 이상 진단장치에 관한 것이다.The present invention relates to an apparatus for diagnosing abnormalities of a secondary air system.
본 발명의 구성은, 2차 에어를 발생시키는 2차 에어펌프(1)가 콤비네이션밸브(2)를 거쳐 배기매니홀드(4)로 공급토록 하고, 서지탱크(3)의 부압정도에 따라 응동하여 솔레노이드밸브(5)가 작동하여 콤비네이션밸브(2)의 개방정도를 조절하여 2차공기의 공급량을 단속토록 한 것에 있어서, 상기 콤비네이션밸브(2)의 주변에 온도센서(10)를 설치하여 상기 배기매니홀드(4)로 부터 배기가스가 역류되어 회로내의 온도가 상승되는 것을 감지하여 이상진단회로(20)에 의해 신호로 ECU(6)로 이상확인 신호를 송출하여 제어토록 하는 것에 의해 달성된다.According to the configuration of the present invention, the secondary air pump 1 for generating secondary air is supplied to the exhaust manifold 4 through the combination valve 2, and is reacted according to the degree of negative pressure of the surge tank 3. The solenoid valve (5) is operated to regulate the opening degree of the combination valve (2) to interrupt the supply of secondary air, wherein the temperature sensor (10) is installed around the combination valve (2) to exhaust the The exhaust gas flows back from the manifold 4 to detect an increase in the temperature in the circuit, and the abnormal diagnosis circuit 20 sends the abnormal confirmation signal to the ECU 6 as a signal for control.
이러한 본 발명의 구성에 의해, 배기매니홀드(4)로 부터 배기가스가 역류되는 이상현상을 감지하여 고장진단으로 차량안전을 도모할 수가 있는 등의 매우 유용한 발명인 것이다.By the configuration of the present invention, it is a very useful invention, such as to detect the abnormal phenomenon that the exhaust gas flows back from the exhaust management (4) to promote vehicle safety by failure diagnosis.
Description
본 발명은 2차 에어시스템의 이상 진단장치에 관한 것으로, 더 상세하게는 시스템의 작동 이상여부를 감지하여 차량의 안전을 도모할 수 있도록 발명된 것이다.The present invention relates to an apparatus for diagnosing an abnormality of a secondary air system, and more particularly, to detect a malfunction of the system and to improve the safety of the vehicle.
최근, 시동초기에 대략 60초 동안작동하여 배기가스를 저감시키기 위한 2차 에어시스템이 설치된다.Recently, a secondary air system has been installed to operate for approximately 60 seconds at the beginning of the startup to reduce the exhaust gas.
즉, 이 2차 에어시스템은 서지탱크(3)의 부압과 엔진콘트롤유니트, 즉 ECU(6)의 신호에 의해서 온/오프가 제어되는 데, 2차 에어펌프(1)로 부터 발생되는 2차에어가 콤비네이션밸브(2)를 거쳐 배기매니홀드(4)로 공급되어 배기가스를 저감토록 하는 것이다.That is, the secondary air system is controlled on / off by the negative pressure of the surge tank 3 and the signal of the engine control unit, that is, the ECU 6, and the secondary air pump 1 generates the secondary air pump 1 from the secondary air pump 1. Air is supplied to the exhaust manifold 4 via the combination valve 2 to reduce the exhaust gas.
상기와 같이 구성된 2차 에어시스템에 의하면, 그 사용온도에 제한이 있다.According to the secondary air system configured as described above, the use temperature is limited.
즉, 2차 에어시스템을 구성하고 있는 콤비네이션밸브(2) 및 솔레노이드밸브(5)등은 정상 가동조건의 사용온도인 약 200℃ 이하에서만 작동되도록 제한하고 있다.That is, the combination valve 2 and the solenoid valve 5 constituting the secondary air system are limited to operate only at about 200 ° C. or less, which is a normal operating condition.
이는, 2차 에어시스템은 주로 배기매니홀드(4)의 주변으로 고온의 배기가스와 직접 접하기 쉬운 위치에 설치되어 있다.This is because the secondary air system is mainly installed around the exhaust manifold 4 at a position where the secondary air system is easily in direct contact with the hot exhaust gas.
따라서, 약 700-800℃의 고온을 갖는 배기가스에 의해 2차 에어시스템이 작동중 고장날 가능성이 매우 큰 것이다.Therefore, there is a very high possibility that the secondary air system may fail during operation due to the exhaust gas having a high temperature of about 700-800 ° C.
고장현상은 주로 고온의 배기가스가 배기매니홀드(4)로 부터 콤비네이션밸브(2)측으로 역류되는 것에 의해 발생된다.The failure phenomenon is mainly caused by the high temperature exhaust gas flowing back from the exhaust manifold 4 to the combination valve 2 side.
따라서, 시스템에 이상이 발생되고 차량의 안전에 심각한 문제를 유발시킬 수 있는 등의 폐단이 있었던 것이다.Therefore, there have been closures such as an abnormality in the system and a serious problem in the safety of the vehicle.
본 발명의 목적은 시스템의 작동 이상을 감지하여 차량 안전운행을 도모할 수 있도록 한 2차 에어시스템의 이상 진단장치를 제공하는 데 있다.SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus for diagnosing an abnormality of a secondary air system to detect an abnormal operation of a system and to promote safe driving of a vehicle.
도 1은 본 발명의 회로 구성도1 is a circuit diagram of the present invention
도 2는 본 발명의 온도센서가 설치된 상태의 상세도2 is a detailed view of a state in which a temperature sensor of the present invention is installed;
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 2차 에어펌프 2 : 콤비네이션밸브1: 2nd air pump 2: Combination valve
3 : 서지탱크 4 : 배기매니홀드3: Surge Tank 4: Exhaust Manifold
5 : 솔레노이드밸브 6 : ECU5: solenoid valve 6: ECU
7 : 에어파이프 10 : 온도센서7: air pipe 10: temperature sensor
20 : 이상진단회로20: abnormal diagnosis circuit
이러한 본 발명의 목적은, 2차 에어를 발생시키는 2차 에어펌프(1)가 콤비네이션밸브(2)를 거쳐 배기매니홀드(4)로 공급토록 하고, 서지탱크(3)의 부압정도에 따라 응동하여 솔레노이드밸브(5)가 작동하여 콤비네이션밸브(2)의 개방정도를 조절하여 2차공기의 공급량을 단속토록 한 것에 있어서, 상기 콤비네이션밸브(2)의 주변에 온도센서(10)를 설치하여 상기 배기매니홀드(4)로 부터 배기가스가 역류되어 회로내의 온도가 상승되는 것을 감지하여 이상진단회로(20)에 의해 신호로 ECU(6)로 이상확인 신호를 송출하여 제어토록 하는 것에 의해 달성된다.The object of the present invention is to allow the secondary air pump 1 for generating secondary air to be supplied to the exhaust manifold 4 via the combination valve 2, and to respond according to the degree of negative pressure of the surge tank 3. By operating the solenoid valve (5) to regulate the opening degree of the combination valve (2) to interrupt the supply amount of the secondary air, by installing the temperature sensor (10) around the combination valve (2) This is accomplished by detecting that the exhaust gas flows back from the exhaust manifold 4 and the temperature in the circuit rises, and sends an abnormal confirmation signal to the ECU 6 as a signal by the abnormal diagnostic circuit 20 to control it. .
따라서, 배기매니홀드(4)로 부터 배기가스가 역류되는 이상현상을 감지하여 고장진단으로 차량안전을 도모할 수가 있는 것이다.Therefore, it is possible to detect an abnormal phenomenon in which the exhaust gas flows back from the exhaust manifold 4 and to promote vehicle safety by failure diagnosis.
이하 본 발명의 바람직한 실시예를 첨부된 도면에 의해 상세하 설명하기로 한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
도 1에서는 본 발명의 2차 에어시시템의 회로 구성을 도시하고 있다.1 shows the circuit configuration of the secondary air system of the present invention.
또, 도 2에서는 본 발명의 2차 에어시스템에 이상여부를 감지하기 위한 온도센서(10)가 콤비네이션밸브(2)의 주변에 설치되어 이상진단회로(20)에 의해 이상여부를 검출할 수 있도록 하는 장치를 도시하고 있다.In addition, in FIG. 2, a temperature sensor 10 for detecting an abnormality in the secondary air system of the present invention is installed around the combination valve 2 to detect an abnormality by the abnormality diagnosis circuit 20. The device is shown.
즉, 2차 에어를 발생시키는 2차 에어펌프(1)가 콤비네이션밸브(2)를 거쳐 배기매니홀드(4)로 약 시동초기 60초 동안 ECU(6)에서 2차 에어시스템의 작동신호가 발생되어 솔레노이드밸브(5)의 개방으로 2차 에어를 배기배니홀드(4)에 공급토록 한다.That is, the operation signal of the secondary air system is generated from the ECU 6 for approximately 60 seconds at the start of the secondary air pump 1 for generating secondary air to the exhaust manifold 4 through the combination valve 2. The secondary air is supplied to the exhaust manifold 4 by opening the solenoid valve 5.
이때, 2차 에어시스템의 설치 조건에 의해 배기가스가 배기매니홀드(4)로 부터 역류되어 콤비네이션밸브(2)의 주변이 가열된다.At this time, the exhaust gas flows back from the exhaust manifold 4 according to the installation conditions of the secondary air system, and the surroundings of the combination valve 2 are heated.
따라서, 이 콤비네이션밸브(2)의 주변에 설치된 온도센서(10)가 정상온도 이상의 고온을 감지하여 고장을 진단하게 되는 것이다.Therefore, the temperature sensor 10 installed around the combination valve 2 detects a high temperature above the normal temperature to diagnose a failure.
이러한 고장진단방법은, 우선 콤비네이션밸브(2)에 입력되는 2차공기의 온도를 온도센서로 측정하여 ECU(6)로 보낸다.This failure diagnosis method first measures the temperature of the secondary air input to the combination valve 2 with a temperature sensor and sends it to the ECU 6.
그리고, 약 200℃이하의 정상온도일 때는 본 발명의 2차 에어시스템이 가동되도록 한다.And, at a normal temperature of about 200 ° C or less, the secondary air system of the present invention is operated.
또, 온도센서(10)의 감지온도가 200℃ 이상, 예로서 약 300℃정도가 감지될 경우에는 고온의 배기가스가 역류되어 콤비네이션밸브(2)가 고장되어 온도를 상승시킨 경우이므로, 이때는 이상진단회로(20)에 의해 신호로 2차에어 시스템을 중단토록 이상상태를 ECU(6)에 송출하게 되는 것이다.In addition, when the sensing temperature of the temperature sensor 10 is detected to be 200 ° C. or higher, for example, about 300 ° C., since the exhaust gas of high temperature flows backward and the combination valve 2 breaks down, the temperature is increased. The diagnostic circuit 20 sends an abnormal state to the ECU 6 so that the secondary air system is interrupted by a signal.
이때, 상기 온도센서(10)는 콤비네이션밸브(2)로 2차공기가 유입되도록 접속된 에어파이프(7)에 설치된 것을 도시하고 있으나, 그 설치위치에는 특별한 제한은 없으며, 2차에어의 입구측 주변에는 콤비네이션밸브(2)의 어디에 부착되어도 무방하다.At this time, the temperature sensor 10 is shown installed in the air pipe (7) connected to the secondary air to the combination valve (2), but the installation position is not particularly limited, the inlet side of the secondary air The periphery of the combination valve 2 may be attached to the periphery.
한편, 상기 이상진단회로(20)는 이미 알려진 다양한 회로구성에 의해 설정된 압력과의 차이를 감지할 때 신호를 송출하는 기능으로 그 상세한 설명은 생략하기로 한다.On the other hand, the abnormality diagnosis circuit 20 is a function for transmitting a signal when detecting a difference with the pressure set by the various known circuit configurations already described in detail will be omitted.
상기와 같은 본 발명은, 배기매니홀드(4)로 부터 배기가스가 역류되는 이상현상을 감지하여 고장진단으로 차량안전을 도모할 수가 있는 등의 매우 유용한 발명인 것이다.The present invention as described above is a very useful invention, such as to detect the abnormal phenomenon that the exhaust gas flows back from the exhaust manifold 4 to improve the vehicle safety by troubleshooting.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960069078A KR100188582B1 (en) | 1996-12-20 | 1996-12-20 | Uncommon diagnosis device of a secondary air system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019960069078A KR100188582B1 (en) | 1996-12-20 | 1996-12-20 | Uncommon diagnosis device of a secondary air system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR19980050278A KR19980050278A (en) | 1998-09-15 |
| KR100188582B1 true KR100188582B1 (en) | 1999-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019960069078A KR100188582B1 (en) | 1996-12-20 | 1996-12-20 | Uncommon diagnosis device of a secondary air system |
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| KR (1) | KR100188582B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE112010004124B4 (en) * | 2009-10-21 | 2015-10-08 | Faurecia Emissions Control Technologies | Diagnostic method and apparatus for thermal regenerator aftertreatment device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4337689B2 (en) | 2004-08-30 | 2009-09-30 | トヨタ自動車株式会社 | Control device for internal combustion engine |
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1996
- 1996-12-20 KR KR1019960069078A patent/KR100188582B1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE112010004124B4 (en) * | 2009-10-21 | 2015-10-08 | Faurecia Emissions Control Technologies | Diagnostic method and apparatus for thermal regenerator aftertreatment device |
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| Publication number | Publication date |
|---|---|
| KR19980050278A (en) | 1998-09-15 |
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