KR20050006756A - UEGO sensor control method - Google Patents
UEGO sensor control method Download PDFInfo
- Publication number
- KR20050006756A KR20050006756A KR1020030046690A KR20030046690A KR20050006756A KR 20050006756 A KR20050006756 A KR 20050006756A KR 1020030046690 A KR1020030046690 A KR 1020030046690A KR 20030046690 A KR20030046690 A KR 20030046690A KR 20050006756 A KR20050006756 A KR 20050006756A
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- KR
- South Korea
- Prior art keywords
- oxygen sensor
- exhaust gas
- sensor
- universal exhaust
- control unit
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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
-
- 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)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
본 발명은 유니버설 배기가스 산소센서(UEGO sensor) 작동 제어 방법에 관한 것으로, 좀더 상세하게는 CNG 버스에서 공연비를 제어하기 위해 사용되는 유니버설 배기가스 산소센서의 작동을 제어하는 방법에 관한 것이다.The present invention relates to a method for controlling the operation of the universal exhaust gas oxygen sensor (UEGO sensor), and more particularly to a method for controlling the operation of the universal exhaust gas oxygen sensor used to control the air-fuel ratio in the CNG bus.
도 1에 도시된 바와 같이, 유니버설 배기가스 산소센서(10)는 배기계(20)에 설치되어 있는 바, 유니버설 배기가스 산소센서(10)의 히터(11; heater)는 펌프셀(13; pump cell)과 센스셀(15; sense cell)의 원할한 동작을 위하여 약 600 ∼ 800℃로 가열시키는 역할을 하는 것으로, 엔진제어유니트가 히터(11)의 전류를 PWM 방식으로 제어하도록 되어 있다.As shown in FIG. 1, the universal exhaust gas oxygen sensor 10 is installed in the exhaust system 20. The heater 11 of the universal exhaust gas oxygen sensor 10 is a pump cell 13. ) And a sense cell (15) to heat to about 600 ~ 800 ℃ for a smooth operation, the engine control unit is to control the current of the heater 11 in a PWM method.
또, 펌프셀(13)은 산소를 이동시키는 역할을 하며, 센스셀(15)은 연료/공기의 비를 인식하기 위한 것이고, 캘리브레이션 레지스터(17; caribration resistor)는 연료/공기의 비가 1%를 넘지 않도록 제어하기 위한 것이다.In addition, the pump cell 13 serves to move oxygen, the sense cell 15 is for recognizing the fuel / air ratio, and the calibration resistor 17 (caribration resistor) has a fuel / air ratio of 1%. It is to control not to pass.
상기와 같은 구성을 가지는 유니버설 배기가스 산소센서는 통상적으로 시동키가 온됨과 동시에 엔진제어유니트가 히터를 동작시키도록 되어 있는데, 유니버설 배기가스 산소센서의 내부 또는 표면에 수분이 있는 상태에서 유니버설 배기가스 산소센서가 급격히 가열됨에 따라 급격한 온도 변화로 인해 센서에 크랙이 발생하거나 내구성이 열화되는 문제점이 있었다.In the universal exhaust gas oxygen sensor having the above configuration, the engine control unit operates the heater at the same time as the ignition key is turned on. As the oxygen sensor is rapidly heated, there is a problem that the crack occurs in the sensor due to the rapid temperature change or the durability deteriorates.
이에, 본 발명은 상기한 바와 같은 과제를 해소하기 위해 고안된 것으로, 유니버설 배기가스 산소센서(UEGO sensor)를 배기가스로 충분히 워밍업시킨 다음 유니버설 배기가스 산소센서의 히터를 작동시킴으로써, 유니버설 배기가스 산소센서내에 수분이 있는 상태에서 유니버설 배기가스 센서가 급격히 가열됨에 따라 발생되는 센서의 크랙 현상 및 내구성 열화 현상을 예방할 수 있는 유니버설 배기가스산소센서 작동 제어 방법을 제공하는데 그 목적이 있다.Accordingly, the present invention is designed to solve the problems as described above, by warming up the universal exhaust gas oxygen sensor (UEGO sensor) to the exhaust gas sufficiently, by operating the heater of the universal exhaust gas oxygen sensor, the universal exhaust gas oxygen sensor An object of the present invention is to provide a method for controlling the universal exhaust gas sensor, which can prevent cracking and durability deterioration of the sensor caused by rapid heating of the universal exhaust gas sensor in the presence of moisture.
상기한 목적을 달성하기 위한 본 발명에 따른 유니버설 배기가스 산소센서 작동 제어 방법은, 엔진 시동이 걸리면 냉각수온을 검출하는 단계와; 상기 검출된 냉각수온에 따라 지연시간을 결정하는 단계와; 상기 지연시간 만큼 지연 후 유니버설 배기가스 산소센서에 구비된 히터를 작동시키는 단계를 포함하여 구성된 것을 특징으로 한다.Universal exhaust gas oxygen sensor operation control method according to the present invention for achieving the above object comprises the steps of: detecting the coolant temperature when the engine is started; Determining a delay time according to the detected cooling water temperature; And operating the heater provided in the universal exhaust gas oxygen sensor after the delay by the delay time.
상기 지연시간은, 미리 설정된 맵핑된 테이블을 바탕으로 결정되고, 냉각수온이 낮을수록 길게 결정되는 것을 특징으로 한다.The delay time is determined based on a preset mapped table, and the longer the cooling water temperature is, the longer it is determined.
도 1은 일반적인 유니버설 배기가스 산소센서의 구성도,1 is a configuration diagram of a general universal exhaust gas oxygen sensor,
도 2는 본 발명에 따른 유니버설 배기가스 산소센서 작동 제어 방법의 순서도,2 is a flow chart of a universal exhaust gas oxygen sensor operation control method according to the invention,
도 3은 본 발명에 따른 유니버설 배기가스 산소센서 작동 제어 방법을 설명하기 위한 타이밍도이다.3 is a timing diagram illustrating a method for controlling the operation of the universal exhaust gas oxygen sensor according to the present invention.
<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>
10 : UEGO 센서 11 : 히터10: UEGO sensor 11: heater
13 : 펌프셀 15 : 센스셀13: pump cell 15: sense cell
17 : 캘리브레이션 레지스터 20 : 배기계17: calibration register 20: exhaust system
이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예를 설명한다.Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.
도 2는 본 발명에 따른 유니버설 배기가스 산소센서 작동 제어 방법의 순서도이다.2 is a flowchart of a method for controlling operation of a universal exhaust gas oxygen sensor according to the present invention.
상기 도 2에 도시된 바와 같이, 단계(S1)에서는, 미도시된 엔진제어유니트가 엔진 시동이 걸렸는지를 판단하여 엔진 시동이 걸렸으면 단계(S2)를 실행한다.As shown in FIG. 2, in step S1, the engine control unit (not shown) determines whether the engine is started, and if the engine is started, step S2 is executed.
상기 단계(S2)에서는 미도시된 냉각수온센서가 냉각수온도을 검출하여 엔진제어유니트로 입력하고, 이어서 단계(S3)에서는 엔진제어유니트가 상기 검출된 냉각수온도에 따라 지연시간을 결정한다.In step S2, the coolant temperature sensor, which is not shown, detects the coolant temperature and inputs it to the engine control unit. In step S3, the engine control unit determines the delay time according to the detected coolant temperature.
이때, 상기 지연시간은 미리 설정된 맵핑된 테이블을 바탕으로 결정되는데, 지연시간은 냉각수온이 낮을수록 길게 결정되도록 되어 있다.At this time, the delay time is determined based on a preset mapped table, and the delay time is determined to be longer as the cooling water temperature is lower.
이어서, 단계(S4)에서는 엔진제어유니트가 상기와 같이 결정된 지연시간이 경과한 후에 전류를 펄스폭변조(PWM)방식으로 제어하여 유니버설 배기가스 산소센서의 히터로 공급하여 센서를 가열시킨다.Subsequently, in step S4, after the delay time determined as described above, the engine control unit controls the current by a pulse width modulation (PWM) method to supply the heater of the universal exhaust gas oxygen sensor to heat the sensor.
즉, 도 3에 도시된 바와 같이, 엔진 시동이 걸리면 소정시간 동안 지연시킨 다음 전류를 유니버설 배기가스 산소센서의 히터로 공급하여 센서를 가열시키는 것이다.That is, as shown in FIG. 3, when the engine is started, the engine is delayed for a predetermined time and then the current is supplied to the heater of the universal exhaust gas oxygen sensor to heat the sensor.
이상에서 설명한 바와 같이 본 발명에 따르면, 유니버설 배기가스 산소센서(UEGO sensor)를 배기가스로 충분히 워밍업시킨 다음 유니버설 배기가스 산소센서의 히터를 작동시킴으로써, 유니버설 배기가스 산소센서내에 수분이 있는 상태에서 유니버설 배기가스 센서가 급격히 가열됨에 따라 발생되는 센서의 크랙 현상 및 내구성 열화 현상을 예방할 수 있는 효과가 있다.As described above, according to the present invention, by warming up the universal exhaust gas oxygen sensor (UEGO sensor) with exhaust gas and then operating the heater of the universal exhaust gas oxygen sensor, the universal exhaust gas oxygen sensor in the state in which there is moisture in the universal As the exhaust gas sensor is rapidly heated, it is possible to prevent cracking and deterioration of durability of the sensor.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020030046690A KR20050006756A (en) | 2003-07-10 | 2003-07-10 | UEGO sensor control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020030046690A KR20050006756A (en) | 2003-07-10 | 2003-07-10 | UEGO sensor control method |
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| Publication Number | Publication Date |
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| KR20050006756A true KR20050006756A (en) | 2005-01-17 |
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| KR1020030046690A KR20050006756A (en) | 2003-07-10 | 2003-07-10 | UEGO sensor control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100836932B1 (en) * | 2007-08-07 | 2008-06-11 | 현대자동차주식회사 | Apparatus for diagnosis universal exhaust gas oxygen sensor on vehicle and method thereof |
| KR101332248B1 (en) * | 2005-12-14 | 2013-11-25 | 콘티넨탈 오토모티브 게엠베하 | Method and device for the calibration of an exhaust gas probe, and method and device for the operation of an internal combustion engine |
-
2003
- 2003-07-10 KR KR1020030046690A patent/KR20050006756A/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101332248B1 (en) * | 2005-12-14 | 2013-11-25 | 콘티넨탈 오토모티브 게엠베하 | Method and device for the calibration of an exhaust gas probe, and method and device for the operation of an internal combustion engine |
| KR100836932B1 (en) * | 2007-08-07 | 2008-06-11 | 현대자동차주식회사 | Apparatus for diagnosis universal exhaust gas oxygen sensor on vehicle and method thereof |
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