KR20020038218A - Error checking method of intake air sensor - Google Patents

Error checking method of intake air sensor Download PDF

Info

Publication number
KR20020038218A
KR20020038218A KR1020000068305A KR20000068305A KR20020038218A KR 20020038218 A KR20020038218 A KR 20020038218A KR 1020000068305 A KR1020000068305 A KR 1020000068305A KR 20000068305 A KR20000068305 A KR 20000068305A KR 20020038218 A KR20020038218 A KR 20020038218A
Authority
KR
South Korea
Prior art keywords
intake air
average intake
air amount
average
reference value
Prior art date
Application number
KR1020000068305A
Other languages
Korean (ko)
Inventor
강인석
Original Assignee
류정열
기아자동차주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 류정열, 기아자동차주식회사 filed Critical 류정열
Priority to KR1020000068305A priority Critical patent/KR20020038218A/en
Publication of KR20020038218A publication Critical patent/KR20020038218A/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
    • G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

PURPOSE: A method for determining trouble of sensor measuring air amount is provided to determine appropriateness of output signal of the air amount measuring sensor. CONSTITUTION: A method comprises a reference value setup step; and a trouble determination step(200). The reference value setup step comprises an idling average intake air amount measuring step; an engine-stopped average intake air amount measuring step; an offset setup step; and a reference value storage step. The trouble determination step comprises an average intake air amount measuring step(210); a first average intake air amount determination step(240a); a second average intake air amount determination step(240b); and a determination step(250). The average intake air amount measuring step is to measure average intake air amount on idle speed control load condition when an engine stops. The first average intake air amount determination step is to determine whether the average intake air amount is less than 70% of an average intake air amount reference value if air density is low. The second average intake air amount determination step is to determine an air amount measuring sensor is out of order when the average intake air amount is less than 70% of the average intake air amount reference value and to determine whether the average intake air amount is over 130% of the average intake air amount reference value if the air density is high. The determination step is to determine the air amount measuring sensor is out of order if the average intake air amount is over 130% of the average intake air amount reference value.

Description

공기량측정센서의 고장판정방법 {Error checking method of intake air sensor}Fault checking method of air volume measurement sensor {Error checking method of intake air sensor}

본 발명은 공기량측정센서의 고장판정방법에 관한 것으로서 특히, 전자제어유닛(ECU)이 차량에 구비되어 평균흡입공기량을 측정하는 공기량측정센서의 출력신호에 대한 적절성을 판단하는 방법으로써, 공조시험에 대한 비용을 감소시키며 엔진관리시스템(EMS) 개발시 개발공정기간을 단축시킬 수 있는 공기량측정센서의 고장판정방법에 관한 것이다.The present invention relates to a failure determination method of an air flow measurement sensor, and more particularly, an electronic control unit (ECU) is provided in a vehicle to determine the suitability of the output signal of the air flow measurement sensor for measuring the average intake air amount, The present invention relates to a method for determining a failure of an air mass flow sensor that can reduce costs and shorten the development process in developing an engine management system (EMS).

일반적으로 전자제어유닛은 차량에 구비된 각종 센서의 단선, 단락 및 센서출력값의 적절성을 판단하는 장치로서, 공기량측정센서의 고장판정방법은 차량에 구비되어 평균흡입공기량을 측정하는 공기량측정센서의 출력신호에 대한 적절성을 판단하게 되어 평균흡입공기량이 기준치를 벗어나면 고장판정을 하게 된다.In general, the electronic control unit is a device for determining the disconnection, short-circuit, and sensor output value of various sensors provided in the vehicle, and the fault determination method of the air flow measurement sensor is provided in the vehicle to measure the average amount of intake air. When the adequacy of the signal is judged and the average intake air is out of the standard value, a failure judgment is made.

도 1은 종래의 공기량측정센서의 고장판정방법을 도시하는 순서도로, 공기밀도가 높을 때와 낮을 때에 대하여 각각 엔진회전수와 스로틀밸브의 각도별로 출력값을 측정하는 출력값측정단계와(10); 상기 출력값측정단계에서 공기밀도가 높을때와 낮을 때에 대하여 측정한 각각의 출력값을 3차원으로 도시하고, 각각의 경우에 대하여 30%의 옵셋값을 더하고 감하여 기준치범위를 설정하는 기준치설정단계(20)와; 상기 기준치설정단계(20)에서 설정한 기준치범위에 실제출력값이 속하는지 판단하는 출력값판단단계(30)와; 상기 출력값판단단계(30)에서 기준치범위에 실제출력값이 속하지 않으면 고장판정을 하는 고장판정단계(40)로 구성된다.1 is a flowchart illustrating a failure determination method of a conventional air flow rate measuring sensor, and an output value measuring step of measuring an output value for each engine speed and an angle of a throttle valve, respectively, when the air density is high and low; In the output value measuring step, the reference value setting step (20) of setting the reference range by adding and subtracting an offset value of 30% for each case is shown in three dimensions for each output value measured when the air density is high and low. Wow; An output value judging step 30 for judging whether an actual output value belongs to the reference value range set in the reference value setting step 20; In the output value determination step 30, if the actual output value does not belong to the reference value range, it consists of a failure determination step 40 for making a failure determination.

상기 출력값측정단계(10)에서는 저온인 동시에 저기압인 상태로 공기밀도가 높을 때와, 고온인 동시에 고기압인 상태로 공기밀도가 낮을 때에 대하여 각각 엔진회전수와 스로틀밸브의 각도별로 출력값을 측정하게 되며 기준치설정단계(20)에서는 상기 출력값측정단계(10)에서 공기밀도가 높을 때와 낮을 때에 대하여 측정한 각각의 출력값을 엔진회전수와 스로틀밸브의 각도에 대하여 3차원으로 도시하고, 공기밀도가 높을 때에는 30%의 옵셋값을 더하여 옵셋상한치를 구하고, 공기밀도가 낮을 때에는 30%의 옵셋값을 감하여 옵셋하한치를 구하여 상기 옵셋상한치와 옵셋하한치사이의 구간을 기준치범위로 설정하게 된다.In the output value measuring step 10, when the air density is high at low temperature and low pressure, and when the air density is low at high temperature and high pressure, the output value is measured for each engine speed and throttle valve angle. In the reference value setting step 20, each output value measured when the air density is high and low in the output value measuring step 10 is shown in three dimensions with respect to the engine speed and the angle of the throttle valve, and the air density is high. When the air density is low, the offset upper limit value is obtained by adding an offset value of 30%. When the air density is low, the offset lower limit value is obtained by subtracting an offset value of 30%.

또한, 출력값판단단계(30)에서는 실제도로에서의 출력값을 측정하여 상기 기준치설정단계(20)에서 설정한 기준치범위에 실제출력값이 존재하는지 판단하게 되며 고장판정단계(40)에서는 상기 출력값판단단계(30)에서 기준치범위에 실제출력값이 속하지 않으면 고장판정을 하게 된다.In addition, in the output value determination step 30, the output value on the actual road is measured to determine whether an actual output value exists in the reference value range set in the reference value setting step 20, and in the failure determination step 40, the output value determination step ( If the actual output value does not belong to the standard value range at 30), a fault determination is made.

그러나, 종래의 공기량측정센서의 고장판정방법은 상기 기준치범위를 결정하기 위하여 각각의 조건에 대하여 고비용의 설비와 장기간의 시험기간이 필요하다는 문제점이 있었다.However, the conventional fault determination method of the air mass flow sensor has a problem that expensive equipment and long test periods are required for each condition in order to determine the reference range.

본 발명은 상기의 결점을 해소하기 위한 것으로, 전자제어유닛이 차량에 구비되어 평균흡입공기량을 측정하는 공기량측정센서의 출력신호에 대한 적절성을 판단하여 공조시험에 대한 비용을 감소시키며 엔진관리시스템 개발시 개발공정기간을 단축시킬 수 있도록 하는 공기량측정센서의 고장판정방법을 제공하고자 한다.The present invention is to solve the above drawbacks, the electronic control unit is provided in the vehicle to determine the appropriateness of the output signal of the air flow rate measurement sensor for measuring the average intake air amount to reduce the cost for the air conditioning test and develop the engine management system The purpose of this paper is to provide a fault determination method for air mass flow rate sensor, which can shorten the development process time.

이러한 본 발명은 무부하시 아이들스피드컨트롤부하(ISC duty)와 평균흡입공기량을 측정하는 무부하시 평균흡입공기량측정단계(110)와, 엔진정지시 상기 무부하시 평균흡입공기량측정단계(110)의 아이들스피드컨트롤부하상태로 평균흡입공기량을 측정하는 엔진정지시 평균흡입공기량측정단계(120)와, 상기 엔진정지시 평균흡입공기량과 무부하시 평균흡입공기량의 편차를 보정하는 옵셋을 결정하는 옵셋설정단계(130)와, 상기 엔진정지시 평균흡입공기량과 옵셋설정단계(130)에서 설정한 옵셋을 더하여 얻은 평균흡입공기량기준치와 무부하시 아이들스피드컨트롤부하를 전자제어유닛에 저장하는 기준치저장단계(140)를 포함하는 기준치설정단계(100)와; 엔진정지시 상기 기준치설정단계(100)의 아이들스피드컨트롤부하상태로 평균흡입공기량을 측정하는 평균흡입공기량측정단계(210)와, 공기밀도가 낮은 경우에 상기 평균흡입공기량측정단계(210)에서 측정된 평균흡입공기량이 평균흡입공기량기준치의 70%미만인지 판단하는 제1평균흡입공기량판단단계(240a)와, 상기 제1평균흡입공기량판단단계(240a)에서 평균흡입공기량이 평균흡입공기량기준치의 70%미만일 때 공기량측정센서가 고장임을 판정하고, 공기밀도가 높은 경우에 상기 평균흡입공기량측정단계(210)에서 측정된 평균흡입공기량이 평균흡입공기량기준치의 130%를 초과하는지 판단하는 제2평균흡입공기량판단단계(240b)와, 상기 제2평균흡입공기량판단단계(240b)에서 평균흡입공기량이 평균흡입공기량기준치의 130%를 초과할 때 공기량측정센서가 고장임을 판정하는 판정단계(250)로 이루어진 고장판정단계(200)로 구성함으로써 달성된다.The present invention is a no-load average intake air measurement step (110) to measure the idle speed control load (ISC duty) and the average intake air at no load, and the idle speed of the no intake air intake air measurement step (110) during engine stop An average intake air amount measuring step 120 at engine stop measuring the average intake air amount under control load state, and an offset setting step 130 for determining an offset for correcting the deviation between the average intake air amount at no engine load and the average intake air amount at no load. And a reference value storing step 140 of storing the average intake air reference value obtained by adding the average intake air amount at the engine stop and the offset set in the offset setting step 130 and the idle speed control load at no load to the electronic control unit. A reference value setting step (100); When the engine is stopped, the average intake air amount measuring step 210 for measuring the average intake air amount under the idle speed control load state of the reference value setting step 100, and the average intake air amount measuring step 210 when the air density is low The first average intake air determination step 240a for determining whether the average intake air amount is less than 70% of the average intake air reference value, and the average intake air amount in the first average intake air determination step 240a is 70; The second average suction determines that the air quantity measuring sensor is faulty when the percentage is less than%, and determines whether the average intake air amount measured in the average intake air amount measurement step 210 exceeds 130% of the average intake air amount reference value when the air density is high. In the air volume determination step 240b and the second average intake air determination step 240b, when the average intake air amount exceeds 130% of the average intake air volume reference value, It is achieved by constructing a decision step 250, failure determining step (200) consisting of determining that.

도 1은 종래의 공기량측정센서의 고장판정방법을 도시하는 순서도,1 is a flow chart showing a failure determination method of a conventional air mass measurement sensor;

도 2는 본 발명의 공기량측정센서의 고장판정방법의 기준치설정단계를Figure 2 is a reference value setting step of the failure determination method of the air mass flow sensor according to the present invention

도시하는 순서도,Flowchart showing,

도 3은 본 발명의 공기량측정센서의 고장판정방법의 고장판정단계를3 is a fault determination step of the fault determination method of the air mass flow sensor according to the present invention.

도시하는 순서도.Flowchart showing.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

100 : 기준치설정단계100: reference value setting step

110 : 무부하시 평균흡입공기량측정단계110: average intake air measurement step at no load

120 : 엔진정지시 평균흡입공기량측정단계120: average intake air measurement step at engine stop

130: 옵셋설정단계140 : 기준치저장단계130: offset setting step 140: reference value storage step

200 : 고장판정단계210 : 평균흡입공기량측정단계200: failure determination step 210: average intake air measurement step

220 : 온도판단단계230 : 고지학습량판단단계220: temperature judgment step 230: highland learning amount judgment step

240a : 제1평균흡입공기량판단단계240b : 제2평균흡입공기량판단단계240a: first average intake air determination step 240b: second average intake air determination step

250 : 판정단계250: judgment step

본 발명의 실시예를 첨부된 도 2 내지 도 3을 참고하여 상세히 설명하면 다음과 같다.When described in detail with reference to Figures 2 to 3 attached to the embodiment of the present invention.

도 2는 본 발명의 공기량측정센서의 고장판정방법의 기준치설정단계(100)를 도시하는 순서도이며, 도 3은 본 발명의 공기량측정센서의 고장판정방법의 고장판정단계를 도시하는 순서도로, 본 발명의 구성은 무부하시 800RPM 아이들스피드컨트롤부하와 평균흡입공기량을 측정하는 무부하시 평균흡입공기량측정단계(110)와, 5분이상 차량주행후 엔진정지시 상기 무부하시 평균흡입공기량측정단계(110)의 아이들스피드컨트롤부하상태로 평균흡입공기량을 5회 측정하는 엔진정지시 평균흡입공기량측정단계(120)와, 상기 엔진정지시 평균흡입공기량과 무부하시 800RPM 평균흡입공기량의 편차를 보정하는 옵셋을 결정하는 옵셋설정단계(130)와, 상기 엔진정지시 5회 측정한 평균흡입공기량의 평균값과 옵셋설정단계(130)에서 설정한 옵셋을 더하여 얻은 평균흡입공기량기준치와 무부하시 아이들스피드컨트롤부하를 전자제어유닛에 저장하는 기준치저장단계(140)를 포함하는 기준치설정단계(100)와; 5분이상 차량주행후 엔진정지시 상기 기준치설정단계(100)의 아이들스피드컨트롤부하상태로 평균흡입공기량을 5회 측정하는 평균흡입공기량측정단계(210)와, 공기밀도가 낮은 경우에 상기 평균흡입공기량측정단계(210)에서 측정된 평균흡입공기량이 평균흡입공기량기준치의 70%미만인지 판단하는 제1평균흡입공기량판단단계(240a)와, 상기 제1평균흡입공기량판단단계(240a)에서 평균흡입공기량이 평균흡입공기량기준치의 70%미만일 때 공기량측정센서가 고장임을 판정하고, 공기밀도가 높은 경우에 상기 평균흡입공기량측정단계(210)에서 측정된 평균흡입공기량이 평균흡입공기량기준치의 130%를 초과하는지 판단하는 제2평균흡입공기량판단단계(240b)와, 상기 평균흡입공기량이 평균흡입공기량기준치의 130%를 초과할 때 공기량측정센서가 고장임을 판정하는 판정단계(250)로 이루어진 고장판정단계(200)로 구성된다.2 is a flowchart showing a reference value setting step 100 of the fault determination method of the air flow rate measurement sensor of the present invention, and FIG. 3 is a flow chart showing the fault determination step of the fault determination method of the air amount measurement sensor of the present invention. The configuration of the present invention is the no-load average intake air flow measurement step 110 to measure the 800 RPM idle speed control load and the average intake air load at no load, and the no-load average intake air measurement step 110 when the engine stops after driving for at least 5 minutes. Determination of the average intake air amount during the engine stop step 120 of measuring the average intake air amount five times with the idle speed control load of the engine, and the offset for correcting the deviation of the average intake air amount at 800 RPM when the engine stops and no load The average suction hole obtained by adding the offset setting step 130 to the average value of the average intake air amount measured five times when the engine is stopped and the offset set in the offset setting step 130. Amount and the reference value 100, a reference value setting step comprises a threshold value storage step 140 to store the no-load idle speed control, the load on the electronic control unit; When the engine is stopped for 5 minutes or more and the engine is stopped, the average intake air amount measuring step 210 of measuring the average intake air amount five times in the idle speed control load state of the reference value setting step 100 and the average intake when the air density is low A first average intake air determination step 240a determining whether the average intake air amount measured in the air volume measurement step 210 is less than 70% of the average intake air reference value, and the average intake air in the first average intake air determination step 240a; When the air amount is less than 70% of the average intake air standard value, it is determined that the air volume measurement sensor is faulty, and when the air density is high, the average intake air amount measured in the average intake air amount measuring step 210 is 130% of the average intake air standard value. The second average intake air determination step 240b for determining whether the excess air is exceeded; and when the average intake air amount exceeds 130% of the average intake air amount reference value, It consists of the deterioration determining step (200) consisting of a decision step 250.

이하, 도 2 내지 도 3을 참고하여 본 발명의 작용을 설명하면 다음과 같다.Hereinafter, the operation of the present invention will be described with reference to FIGS. 2 to 3.

우선, 기준치설정단계(100)의 무부하시 평균흡입공기량측정단계(110)에서는 무부하시 800RPM 아이들스피드컨트롤부하와 평균흡입공기량을 측정하게 되는데 이때 측정된 아이들스피드컨트롤부하는 40%라고 하였을 때, 엔진정지시 평균흡입공기량측정단계(120)에서는 5분이상 차량주행후 엔진정지시 상기 무부하시 평균흡입공기량측정단계(110)의 아이들스피드컨트롤부하가 40%인상태로 평균흡입공기량을 5회 측정하게 된다.First, in the no-load average suction air measurement step 110 of the reference value setting step 100, the 800 RPM idle speed control load and the average suction air load are measured at no load, and the measured idle speed control load is 40%. In the mean air intake air measurement step 120 at stop, the average intake air load is measured five times while the idle speed control load of the intake air intake air load measurement step 110 is 40% when the engine stops after 5 minutes or more. do.

옵셋설정단계(130)에서는 상기 엔진정지시 평균흡입공기량과 무부하시 800RPM 평균흡입공기량의 편차를 보정하기 위하여 엔진정지시 평균흡입공기량에서 무부하시 평균흡입공기량을 뺀 값으로 옵셋을 결정하게 되며, 기준치저장단계(140)에서는 상기 엔진정지시 5회 측정한 흡입공기량의 평균값인 흡입공기량평균값과 옵셋설정단계(130)에서 설정한 옵셋을 더하여 얻은 평균흡입공기량기준치와 무부하시 아이들스피드컨트롤부하 40%를 전자제어유닛에 저장하게 된다.In the offset setting step 130, the offset is determined by subtracting the average intake air amount at no load from the average intake air amount at no load and correcting the deviation between the average intake air amount at no engine load and the 800 RPM average intake air amount at no load. In the storing step 140, the average intake air amount reference value obtained by adding the average value of the intake air amount measured at the engine stop five times and the offset set in the offset setting step 130 and the idle speed control load 40% at no load are obtained. It is stored in the electronic control unit.

그리고, 고장판정단계(200)의 평균흡입공기량측정단계(210)에서는 5분이상 차량주행후 엔진정지시 상기 기준치설정단계(100)의 아이들스피드컨트롤부하가 40%인 상태로 흡입공기량을 5회 측정하여 평균흡입공기량을 산출하고, 공기밀도가 낮은 경우에는 상기 평균흡입공기량측정단계(210)에서 측정된 평균흡입공기량이 평균흡입공기량기준치의 70%미만인지 제1평균흡입공기량판단단계(240a)에서 판단하고, 상기 제1평균흡입공기량판단단계(240a)에서 평균흡입공기량이 평균흡입공기량기준치의 70%미만일 때 공기량측정센서가 고장임을 판정단계(250)에서 판정한다.In the mean suction air volume measurement step 210 of the fault determination step 200, when the engine stops after driving for 5 minutes or more, the intake air volume is five times while the idle speed control load of the reference value setting step 100 is 40%. When the average intake air amount is measured and the air density is low, the first intake air determination step 240a is an average intake air amount measured in the average intake air amount measuring step 210 is less than 70% of the average intake air reference value. In the first average suction air determination step 240a, when the average intake air amount is less than 70% of the average intake air reference value, it is determined in the determination step 250 that the air quantity measuring sensor is faulty.

또한, 공기밀도가 높은 경우에는 상기 평균흡입공기량측정단계(210)에서 측정된 평균흡입공기량이 평균흡입공기량기준치의 130%를 초과하는지 제2평균흡입공기량판단단계(240b)에서 판단하고, 상기 제2평균흡입공기량판단단계(240b)에서 평균흡입공기량이 평균흡입공기량기준치의 130%를 초과할 때 공기량측정센서가 고장임을 판정단계(250)에서 판정하게 된다.In addition, when the air density is high, it is determined in the second average intake air determination step 240b whether the average intake air amount measured in the average intake air amount measurement step 210 exceeds 130% of the average intake air amount reference value, In the second average intake air determination step 240b, when the average intake air amount exceeds 130% of the average intake air amount reference value, it is determined in the determination step 250 that the air quantity measuring sensor is faulty.

또한, 상기의 공기밀도가 낮은 경우는 온도판단단계(220)에서 측정된 기온이 0℃이상이고 고지학습량판단단계(230)에서 측정된 고지학습량이 고지학습량기준치이하인 경우이며, 공기밀도가 높은 경우는 온도판단단계(220)에서 측정된 기온이 0℃보다 낮거나 고지학습량판단단계(230)에서 측정된 고지학습량이 고지학습량기준치를 초과하는 경우이다.In addition, when the air density is low, the temperature measured in the temperature determination step 220 is 0 ° C. or higher and the highland learning amount measured in the highland learning amount determination step 230 is less than or equal to the highland learning amount reference value, and the air density is high. Is a case where the temperature measured in the temperature determination step 220 is lower than 0 ° C. or the highland learning amount measured in the highland learning amount determination step 230 exceeds the highland learning amount reference value.

상기 고지학습량기준치는 해발 1000m에서는 0.9를 사용하며 해발 2000m에서는 0.8을 사용하고 있다.The highland learning standard is 0.9 at 1000m above sea level and 0.8 at 2000m above sea level.

상기와 같은 본 발명의 공기량측정센서의 고장판정방법은 전자제어유닛이 차량에 구비되어 평균흡입공기량을 측정하는 공기량측정센서의 출력신호에 대한 적절성을 판단하여 운전자의 안정성을 높여줄 뿐만 아니라 차량설계단계에서 공조시험에 대한 비용을 감소시키며 엔진관리시스템 개발시 개발공정기간을 단축시킬 수 있다.The failure determination method of the air flow rate sensor of the present invention as described above, the electronic control unit is provided in the vehicle to determine the appropriateness of the output signal of the air flow rate sensor for measuring the average amount of intake air as well as increase the stability of the driver design the vehicle It can reduce the cost of air conditioning test at the stage and shorten the development process period when developing the engine management system.

이상과 같은 본 발명은 전자제어유닛이 차량에 구비되어 평균흡입공기량을 측정하는 공기량측정센서의 출력신호에 대한 적절성을 판단하여 공조시험에 대한 비용을 감소시키며 엔진관리시스템 개발시 개발공정기간을 단축시킬 수 있는 발명인 것이다.The present invention as described above, the electronic control unit is provided in the vehicle to determine the appropriateness of the output signal of the air volume measurement sensor for measuring the average intake air amount to reduce the cost for the air conditioning test and shorten the development process period when developing the engine management system It is an invention that can be made.

Claims (3)

무부하시 아이들스피드컨트롤부하와 평균흡입공기량을 측정하는 무부하시 평균흡입공기량측정단계와, 엔진정지시 상기 무부하시 평균흡입공기량측정단계의 아이들스피드컨트롤부하상태로 평균흡입공기량을 측정하는 엔진정지시 평균흡입공기량측정단계와, 상기 엔진정지시 평균흡입공기량과 무부하시 평균흡입공기량의 편차를 보정하는 옵셋을 결정하는 옵셋설정단계와, 상기 엔진정지시 평균흡입공기량과 옵셋설정단계에서 설정한 옵셋을 더하여 얻은 평균흡입공기량기준치와 상기 무부하시 아이들스피드컨트롤부하를 전자제어유닛에 저장하는 기준치저장단계로 이루어진 기준치설정단계와;Average idle air intake air load measurement step for measuring idle speed control load and average intake air load at no load and average intake air load at idle speed control load of idle load intake air flow measurement step at engine stop In addition to the intake air measurement step, an offset setting step of determining an offset for correcting a deviation between the average intake air amount at the engine stop and the average intake air amount at no load, and an offset set in the average intake air amount and offset setting step at the engine stop, A reference value setting step comprising a reference value storing step of storing the obtained average suction air reference value and the idle speed control load at no load in an electronic control unit; 엔진정지시 상기 기준치설정단계의 아이들스피드컨트롤부하상태로 평균흡입공기량을 측정하는 평균흡입공기량측정단계와, 공기밀도가 낮은 경우에 상기 평균흡입공기량측정단계에서 측정된 평균흡입공기량이 평균흡입공기량기준치의 70% 미만인지 판단하는 제1평균흡입공기량판단단계와, 상기 제1평균흡입공기량판단단계에서 평균흡입공기량이 평균흡입공기량기준치의 70%미만일 때 공기량측정센서가 고장임을 판정하는 판정단계로 이루어진 고장판정단계로 구성되는 것을 특징으로 하는 공기량측정센서의 고장판정방법.Average intake air amount measurement step of measuring the average intake air amount under idle idle control load state of the reference value setting step when the engine is stopped, and average intake air amount measured in the average intake air amount measurement step when the air density is low The first average intake air determination step of determining whether less than 70% of the, and in the first average intake air determination step, the determination step of determining that the air volume measurement sensor is broken when the average intake air amount is less than 70% of the average intake air reference value Failure determination method of the air mass flow sensor, characterized in that consisting of a failure determination step. 제 1항에 있어서, 공기밀도가 높은 경우에 상기 평균흡입공기량측정단계에서측정된 평균흡입공기량이 평균흡입공기량기준치의 130%를 초과하는지 판단하는 제2평균흡입공기량판단단계와, 상기 평균흡입공기량이 평균흡입공기량기준치의 130%를 초과할 때 공기량측정센서가 고장임을 판정하는 판정단계로 이루어진 고장판정단계로 구성되는 것을 특징으로 하는 공기량측정센서의 고장판정방법.The second average intake air determination step of determining whether the average intake air amount measured in the average intake air amount measurement step exceeds 130% of the average intake air amount reference value when the air density is high, and the average intake air amount. And a failure determination step comprising a determination step of determining that the air quantity measurement sensor has failed when the average intake air amount reference value exceeds 130%. 제 1항 또는 제 2항에 있어서, 공기밀도가 낮은 경우는 기온이 0℃이상이고 고지학습량이 고지학습량기준치이하인 경우이며, 공기밀도가 높은 경우는 기온이 0℃보다 낮거나 고지학습량이 고지학습량기준치를 초과하는 경우인 것을 특징으로 하는 공기량측정센서의 고장판정방법.The method of claim 1 or 2, wherein the air density is low when the temperature is more than 0 ℃ and highland learning amount is below the highland learning standard value, when the air density is high, the temperature is lower than 0 ℃ or highland learning quantity is highland learning quantity A failure determination method for an air mass flow sensor, characterized in that it exceeds the reference value.
KR1020000068305A 2000-11-17 2000-11-17 Error checking method of intake air sensor KR20020038218A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020000068305A KR20020038218A (en) 2000-11-17 2000-11-17 Error checking method of intake air sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020000068305A KR20020038218A (en) 2000-11-17 2000-11-17 Error checking method of intake air sensor

Publications (1)

Publication Number Publication Date
KR20020038218A true KR20020038218A (en) 2002-05-23

Family

ID=19699583

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020000068305A KR20020038218A (en) 2000-11-17 2000-11-17 Error checking method of intake air sensor

Country Status (1)

Country Link
KR (1) KR20020038218A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100986348B1 (en) * 2004-08-27 2010-10-08 현대자동차주식회사 Method for compensating an output value of an air flow sensor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04171238A (en) * 1990-11-05 1992-06-18 Japan Electron Control Syst Co Ltd Apparatus for diagnosing abnormality of air flow meter in internal combustion engine
KR100263746B1 (en) * 1997-07-19 2000-08-16 정몽규 Monitoring method for malfunction determining of secondary air induction system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04171238A (en) * 1990-11-05 1992-06-18 Japan Electron Control Syst Co Ltd Apparatus for diagnosing abnormality of air flow meter in internal combustion engine
KR100263746B1 (en) * 1997-07-19 2000-08-16 정몽규 Monitoring method for malfunction determining of secondary air induction system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100986348B1 (en) * 2004-08-27 2010-10-08 현대자동차주식회사 Method for compensating an output value of an air flow sensor

Similar Documents

Publication Publication Date Title
US5269277A (en) Failure-detecting device and fail-safe device for tank internal pressure sensor of internal combustion engines
US6032644A (en) Method and arrangement for controlling an internal combustion engine
CN101307739A (en) Method and apparatus for monitoring an intake air filter
KR100435707B1 (en) Method of checking rear o2 sensor trouble for vehicles
KR100990372B1 (en) Method and device for monitoring a pressure sensor
CN111140377A (en) Method and device for detecting misloading of throttle valve, storage medium and electronic equipment
US20060200301A1 (en) Engine control method and device
US20050187699A1 (en) Airflow variation learning using electronic throttle control
US5623905A (en) Method and arrangement for controlling an internal combustion engine
KR100772853B1 (en) Method and device for monitoring a sensor
CN113586238B (en) Detection method and detection device for engine exhaust system and engine
KR20020038218A (en) Error checking method of intake air sensor
KR100376704B1 (en) Method of providing torque information for engine
KR100435694B1 (en) A method for measuring mass of inducted air and a system thereof
JP3946365B2 (en) Vehicle drive output control method and apparatus
KR20170068783A (en) Fault diagnosing method of tps using modeling motor position and apparartus the same
KR19990010919A (en) Monitoring method of map sensor
KR100305809B1 (en) Control method of air fuel ratio of hydrogen engine
KR20040001638A (en) Apparatus for diagnosis failure of water temperature sensor on vehicle and method thereof
KR100398249B1 (en) A method for clipping intake air volume in hot film AFS EMS
JPH08211904A (en) Controller for equipment
KR100350271B1 (en) Method for maintaining transient air amount of automobiles
JPH09303191A (en) Abnormality diagnosing device of intake air temperature sensor for internal combustion engine
KR20060072668A (en) Water temperature sensor of vehicle and the diagnosis thereof
KR100507101B1 (en) Method for measuring remaining fuel for automobile

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application