KR970044918A - Oxygen sensor diagnosis device and method of automobile - Google Patents

Oxygen sensor diagnosis device and method of automobile Download PDF

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Publication number
KR970044918A
KR970044918A KR1019950054880A KR19950054880A KR970044918A KR 970044918 A KR970044918 A KR 970044918A KR 1019950054880 A KR1019950054880 A KR 1019950054880A KR 19950054880 A KR19950054880 A KR 19950054880A KR 970044918 A KR970044918 A KR 970044918A
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KR
South Korea
Prior art keywords
oxygen sensor
output voltage
voltage
output
predetermined
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Application number
KR1019950054880A
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Korean (ko)
Inventor
변성광
Original Assignee
배순훈
대우전자 주식회사
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Priority to KR1019950054880A priority Critical patent/KR970044918A/en
Publication of KR970044918A publication Critical patent/KR970044918A/en

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Abstract

본 발명은 산소센서와 연결 구성품들의 오동작을 조기에 발견할 수 있는 자동차의 산소센서 진단장치 및 방법을 제공하는데 그 목적이 있다. 본 발명은 배기가스 산소농도가 높을때는 낮은 전압을 출력시키고, 배기가스의 산소농도가 낮을 때는 높은 전압을 출력시키는 산소센서; 상기 산소센서의 출력전압(V2)을 감지하는 산소센서 진단장치; 자동차의 시동 스위치 및 엑셀레이터를 제어하며, 상기 산소센서에서 검출되 출력전압(V1)을 직접 입력받고, 또한 상기 산소센서 진단장치에서 감지된 산소센서의 출력전압(V2)을 입력 받으며, 이 입력된 전압값을 분석하여 점검이 필요한 구성품이 있다고 판단될 경우 소정의 점검신호를 출력시키는 ECM; 그리고 상기 ECM의 점검신호에 따라 각 구성품의 이상 유무를 나타내는 디스 플레이수단으로 구성되는 것을 특징으로 한다. 이에따라, 본 발명은 규정이상의 일산화탄소(CO)와 탄화수소(HC)를 배출시키고 가속력을 떨어뜨리는 산소센서의 오동작을 조기에 발견할 수 있는 효과가 있다.SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus and method for diagnosing an oxygen sensor in a vehicle, which can detect malfunctions of the oxygen sensor and the connected components at an early stage. The present invention provides an oxygen sensor which outputs a low voltage when the exhaust gas oxygen concentration is high and outputs a high voltage when the oxygen concentration of the exhaust gas is low; Oxygen sensor diagnostic device for detecting the output voltage (V 2 ) of the oxygen sensor; It controls the start switch and the accelerator of the vehicle, directly receives the output voltage (V 1 ) detected by the oxygen sensor, and also receives the output voltage (V 2 ) of the oxygen sensor detected by the oxygen sensor diagnosis device. An ECM which outputs a predetermined check signal when it is determined that there is a component to be checked by analyzing the input voltage value; And characterized in that it is composed of a display means for indicating the presence or absence of each component in accordance with the check signal of the ECM. Accordingly, the present invention has an effect that can detect the malfunction of the oxygen sensor to discharge the carbon monoxide (CO) and hydrocarbons (HC) more than the specified and to reduce the acceleration force early.

Description

자동차의 산소센서 진단장치 및 방법Oxygen sensor diagnosis device and method of automobile

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명의 일실시예에 따른 자동차의 산소센서 진단장치의 블록도,1 is a block diagram of an oxygen sensor diagnostic apparatus for a vehicle according to an embodiment of the present invention;

제2도는 본 발명의 일실시예에 따른 자동차의 산소센서 진단방법의 흐름도.2 is a flowchart of a method for diagnosing an oxygen sensor of a vehicle according to an exemplary embodiment of the present invention.

Claims (4)

자동차의 배기 매니폴드(50)에 장착되어 배기가스 산소농도가 높을때는 낮은 전압을 출력시키고, 배기가스의 산소농도가 낮을 때는 높은 전압을 출력시키는 산소센서(10); 상기 산소센서(10)의 출력전압(V2)을 감지하여 ECM(80)으로 입력시키는 산소센서 진단장치(100); 자동차의 시동 스위치 및 엑셀레이터를 제어하며, 상기 산소센서(10)에서 검출되 출력전압(V1)을 직접 입력받고, 또한 상기 산소센서 진단장치(100)에서 감지된 산소센서(10)의 출력전압(V2)을 입력 받으며, 이 입력된 전압값을 분석하여 점검이 필요한 구성품이 있다고 판단될 경우 소정의 점검신호를 출력시키는 ECM(80); 그리고 자동차 실내에 장착되고, ECM의 점검신호에 따라 각 구성품의 이상 유무를 시각적으로 나타내는 디스 플레이수단(200)으로 구성되는 것을 특징으로 하는 자동차의 산소센서 진단장치.An oxygen sensor 10 mounted on the vehicle exhaust manifold 50 to output a low voltage when the exhaust gas oxygen concentration is high, and output a high voltage when the exhaust gas oxygen concentration is low; Oxygen sensor diagnostic device 100 for detecting the output voltage (V 2 ) of the oxygen sensor 10 and inputs it to the ECM (80); Controls the start switch and the accelerator of the vehicle, and directly receives the output voltage (V 1 ) detected by the oxygen sensor 10, and also the output voltage of the oxygen sensor 10 detected by the oxygen sensor diagnostic device 100 An ECM 80 that receives the input of V 2 and analyzes the input voltage value and outputs a predetermined check signal when it is determined that there is a component to be checked; And an oxygen sensor diagnostic apparatus for a vehicle, which is mounted inside a vehicle and comprises a display means 200 which visually indicates the presence or absence of an abnormality of each component according to a check signal of an ECM. 제1항에 있어서, 상기 디스 플레이수단(200)은 상기 ECM(80)으로부터 정상상태 신호가 입력되면 파란색으로 점등되며, 특정 구성품의 점검신호가 입력되며 소정의 점검코드와 함께 빨간색으로 전등되는 것을 특징으로 하는 자동차의 산소센서 진단장치.According to claim 1, wherein the display means 200 is lit blue when the steady state signal is input from the ECM (80), the check signal of a specific component is input and the red light with a predetermined check code Oxygen sensor diagnostic device of the vehicle. 엔진을 작동시키고, 엔진의 회전수를 1200rpm으로 맞추는 단계(S10); 산소센서(10)로부터 출력되는 제1출력전압(V1)이 소정의 기준전압에 해당되는가를 판단하는 단계(S20); 상기 단계(S20)에서 제1출력전압(V1)이 소정의 기준전압에 해당된다고 판단되면, 정상상태신호를 출력시키는 단계(S30);상기 단계(S20)에서 제1출력전압(V1)이 소정의 기준전압에 해당되지 않을 경우, 엔진의 회전수를 증가시켜 가속시키는 단계(S40) 상기 단계(S40)다음에, 산소센서 진단장치(100)에서 검출된 산소센서(10)의 제2출력전압(V2)을 입력받는 단계(S50); 상기 단계(S50)에서 입력된 산소센서(10)의 제2출력전압(V2)이 소정의 미출력 전압값(VX)보다 작은지를 판단하는 단계(S60); 상기 단계(S60)에서 산소센서(10)의 제2출력전압(V2)이 소정의 미출력 전압값(VX)보다 작다고 판단될 경우, 산소센서 점검신호를 출력시키는 단계(S70); 상기 단계(S70)에서 산소센서(10)의 제2출력전압(V2)이 소정의 미출력 전압값(VX)보다 크다고 판단될 경우, 그 제2출력전압(V2)이 소정의 정상 출력 최소값(Vy)보다 큰지를 판단하는 단계(S80);상기 단계(S80)에서 제2출력전압(V2)이 소정의 정상출력 최소값(Vy)보다 크다고 판단되면, ECM 점검신호를 출력시키는 단계(S90); 그리고 상기 단계(S80)에서 제2출력전압(V2)이 소정의 정상출력 최소값(Vy)보다 작다고 판단되면, 배선상태 점검신호를 출력시키는 단계(S100)을 포함하는 것을 특징으로 하는 자동차의 산소센서 진단방법.Operating the engine and setting the engine speed to 1200 rpm (S10); Step first output voltage (V 1) output from the oxygen sensor 10 is to determine Is corresponds to the predetermined reference voltage (S20); If it is determined in step S20 that the first output voltage V 1 corresponds to a predetermined reference voltage, outputting a steady state signal (S30); in step S20, the first output voltage V 1 . If it does not correspond to the predetermined reference voltage, increasing the number of revolutions of the engine to accelerate (S40) After the step (S40), the second of the oxygen sensor 10 detected by the oxygen sensor diagnostic device 100 Receiving an output voltage V 2 (S50); Determining whether the second output voltage V 2 of the oxygen sensor 10 input in the step S50 is smaller than a predetermined unoutput voltage value V X (S60); If it is determined in step S60 that the second output voltage V 2 of the oxygen sensor 10 is smaller than a predetermined unoutput voltage value V X , outputting an oxygen sensor check signal (S70); When it is determined in step S70 that the second output voltage V 2 of the oxygen sensor 10 is greater than the predetermined unoutput voltage value V X , the second output voltage V 2 is a predetermined normal output. minimum step (S80) to determine if it is greater than (V y); the second output voltage (V 2) in said step (S80) is when determined to be larger than the predetermined normal output the minimum value (V y), which outputs the ECM check signal Step S90; And if it is determined in step S80 that the second output voltage V 2 is smaller than a predetermined normal output minimum value V y , outputting a wiring state check signal (S100). Oxygen sensor diagnosis method. 제3항에 있어서, 상기 단계(S40)이, 단계(S20)에서 제1출력전압(V1)이 소정의 기준전압에 해당되지 않을 경우, 점화 스위치를 온(ON)시키는 것으로 대체되는 것을 특징으로 하는 자동차의 산소센서 진단방법.4. The method of claim 3, wherein the step S40 is replaced by turning on an ignition switch when the first output voltage V 1 does not correspond to a predetermined reference voltage in step S20. Diagnostic method of oxygen sensor in cars.
KR1019950054880A 1995-12-22 1995-12-22 Oxygen sensor diagnosis device and method of automobile KR970044918A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100412711B1 (en) * 2001-11-28 2003-12-31 현대자동차주식회사 Method of checking rear o2 sensor for vehicles
KR100507100B1 (en) * 2002-12-03 2005-08-09 현대자동차주식회사 Oxygen sensor diagnosis control method
KR100774313B1 (en) * 2004-11-24 2007-11-08 현대자동차주식회사 A diagnosis of oxygen sensor on vehicle
KR102298807B1 (en) * 2020-07-24 2021-09-08 주식회사 현대케피코 Complementary circuit for oxygen sensor, apparatus and method for determining noise using thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100412711B1 (en) * 2001-11-28 2003-12-31 현대자동차주식회사 Method of checking rear o2 sensor for vehicles
KR100507100B1 (en) * 2002-12-03 2005-08-09 현대자동차주식회사 Oxygen sensor diagnosis control method
KR100774313B1 (en) * 2004-11-24 2007-11-08 현대자동차주식회사 A diagnosis of oxygen sensor on vehicle
KR102298807B1 (en) * 2020-07-24 2021-09-08 주식회사 현대케피코 Complementary circuit for oxygen sensor, apparatus and method for determining noise using thereof

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