KR20150115043A - Detecting method of trouble of egr valve - Google Patents
Detecting method of trouble of egr valve Download PDFInfo
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- KR20150115043A KR20150115043A KR1020140039166A KR20140039166A KR20150115043A KR 20150115043 A KR20150115043 A KR 20150115043A KR 1020140039166 A KR1020140039166 A KR 1020140039166A KR 20140039166 A KR20140039166 A KR 20140039166A KR 20150115043 A KR20150115043 A KR 20150115043A
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- 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]
- F02D41/005—Controlling exhaust gas recirculation [EGR] according to engine operating conditions
- F02D41/0055—Special engine operating conditions, e.g. for regeneration of exhaust gas treatment apparatus
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- 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
- F02M26/45—Sensors specially adapted for EGR systems
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- 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
- F02M2026/001—Arrangements; Control features; Details
- F02M2026/004—EGR valve controlled by a temperature signal or an air/fuel ratio (lambda) signal
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- 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
- Y02T10/12—Improving ICE efficiencies
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- Combined Controls Of Internal Combustion Engines (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
Description
본 발명은 배기가스재순환 밸브의 고장을 검출하는 방법에 관한 것으로, 더욱 상세하게는 보다 정밀하게 EGR(EXHAUST GAS RECIRCULATION; 배기가스재순환)밸브의 고장을 검출할 수 있게 하는 배기가스재순환 밸브의 고장을 검출하는 방법에 관한 것이다.The present invention relates to a method for detecting the failure of an exhaust gas recirculation valve, and more particularly to a method for detecting a failure of an exhaust gas recirculation valve that enables detection of a failure of an EGR (EXHAUST GAS RECIRCULATION) And a method for detecting the same.
EGR은 NOx가 많이 발생되는 이론 공연비 부근에서 NOx를 저감시키기 위하여 배기가스의 일부를 엔진의 흡기매니폴드로 재순환시켜 출력감소를 최소화하면서 연소 온도를 낮춰 NOx를 줄이게 하는 장치이다.EGR is a device that recirculates a part of the exhaust gas to the intake manifold of the engine in order to reduce NOx in the vicinity of the stoichiometric air-fuel ratio where a large amount of NOx is generated, thereby reducing the NOx by lowering the combustion temperature while minimizing the output decrease.
EGR이 작동됨에 따라 배기가스가 연소실로 유입되면 연소반응에 좋지 않은 영향을 주게 되며 최악의 경우 실화를 초래하게 된다. 즉, EGR은 엔진 상태가 불안정한 공회전시 또는 엔진 웜업전에는 작동되지 않고 NOx 저감이 필요한 상황 즉, 이론 공연비 부근에서만 작동되는 것이 바람직하다. As the EGR is operated, the exhaust gas flows into the combustion chamber, which adversely affects the combustion reaction. In the worst case, it causes misfire. That is, it is preferable that the EGR is operated only in the vicinity of the stoichiometric air-fuel ratio when the engine is in an unstable idling state or before the engine warm-up, and NOx reduction is required.
이러한, EGR은 배기매니폴드와 흡기매니폴드를 연결하는 관에 구비된 EGR밸브의 개폐에 따라 작동되므로, NOx 저감이 필요한 상황에서만 EGR밸브가 개구될 수 있는지 알 수 있도록, EGR밸브의 고장을 진단해야 한다.Since the EGR operates in accordance with the opening and closing of the EGR valve provided in the pipe connecting the exhaust manifold and the intake manifold, it is possible to diagnose the failure of the EGR valve so that the EGR valve can be opened only in a situation where NOx reduction is necessary. Should be.
이에 상기와 같은 점을 감안하여 발명된 본 발명의 목적은, 보다 정밀하게 EGR밸브의 고장을 진단할 수 있는 배기가스재순환 밸브의 고장을 검출하는 방법을 제공하는 것이다.SUMMARY OF THE INVENTION It is an object of the present invention, which has been made in view of the above, to provide a method for detecting a failure of an exhaust gas recirculation valve capable of diagnosing a failure of an EGR valve more precisely.
상기와 같은 목적을 달성하기 위한 본 발명의 배기가스재순환 밸브의 고장을 검출하는 방법에 따르면, EGR밸브가 작동되고 EGR밸브의 작동상태와, 엔진의 rpm과 흡기압을 모니터링하는 EGR밸브 작동단계와, 이론공연비가 되도록 엔진의 연소제어 상태가 지속적으로 조절되고, 엔진의 정상작동값을 계산하는 EGR밸브 작동시 측정값 계산단계와, EGR밸브가 강제적으로 닫히는 EGR밸브폐쇄단계와, EGR밸브가 닫힌 상태로 엔진의 비정상작동값을 계산하는 EGR밸브 비작동시 측정값 계산단계와, 정상작동값과 비정상작동값의 차이가 임계값보다 작은지를 판단하는 작동값비교단계를 포함하며, 정상작동값과 비정상작동값의 차이가 임계값보다 작을 때, EGR밸브가 비정상인 것으로 판단되는 것을 특징으로 하는 배기가스재순환 밸브의 고장을 검출하는 방법을 제공한다.In order to achieve the above object, there is provided a method for detecting a failure of an exhaust gas recirculation valve according to the present invention, comprising the steps of: operating an EGR valve and operating an EGR valve; monitoring an rpm and an intake pressure of the engine; Calculating a measured value at the time of operating the EGR valve to continuously calculate the normal operation value of the engine so that the combustion control state of the engine is continuously controlled so that the stoichiometric air / fuel ratio is obtained; and an EGR valve closing step in which the EGR valve is forcibly closed, An EGR valve non-operating measurement value calculation step of calculating an abnormal operating value of the engine in a state where the difference between the normal operating value and the abnormal operating value is smaller than a threshold value, And the EGR valve is judged to be abnormal when the difference in the abnormal operation value is smaller than the threshold value. The.
본 발명의 하나의 측면에 의하면, EGR밸브 작동단계 전에, EGR밸브의 고장진단 횟수를 선택하는 고장진단모드선택단계가 수행될 수 있으며, 고장진단모드선택단계에서 EGR밸브 작동 중 고장진단 횟수가 1회인 1회모드, EGR밸브 작동 중 고장진단을 주기적으로 하게 되는 상시모드, 엔진의 운행조건에 따라 EGR밸브를 진단하게 되는 특정모드 중 어느 하나가 엔진의 냉각수온과 목표수온을 비교하여 선택될 수 있으며, 고장진단모드선택단계에서 특정모드가 선택되면, EGR밸브 작동단계 수행 후, 엔진의 rpm과 토크가 설정치 범위 내인지를 판단하게 되고, 엔진의 rpm과 토크가 설정치 범위 내일 때, EGR밸브 작동시 측정값 도출단계가 수행될 수 있다.According to one aspect of the present invention, a failure diagnosis mode selection step of selecting the number of times of failure diagnosis of the EGR valve can be performed before the EGR valve operation step, and in the failure diagnosis mode selection step, Any one of the one-time mode, the normal mode in which the trouble diagnosis is periodically performed during the operation of the EGR valve, and the specific mode in which the EGR valve is diagnosed according to the operating conditions of the engine can be selected by comparing the cooling water temperature of the engine with the target water temperature When the specific mode is selected in the failure diagnosis mode selection step, it is determined whether the rpm and the torque of the engine are within the set value range after the EGR valve operation step is performed. When the rpm and the torque of the engine are within the set value range, A time measurement value derivation step can be performed.
본 발명의 다른 측면에 의하면, 정상작동값과, 비정상작동값은 엔진의 rpm, 흡기압, EGR률을 변수로하는 함수값일 수 있다.According to another aspect of the present invention, the normal operation value and the abnormal operation value may be function values having the rpm, the intake pressure, and the EGR rate of the engine as variables.
본 발명의 또 다른 측면에 의하면, EGR밸브 작동시 측정값 계산단계는 엔진에서 이론공연비 상태로 연소가 발생되도록 흡기량과 연료분사량이 지속적으로 조절되는 이론공연비제어고정단계와, 엔진의 이론공연비 상태에서의 작동을 유지하는 정상상태딜레이단계와, 정상작동값을 계산하는 정상상태계산단계를 포함할 수 있으며, 비작동시 측정값 계산단계는 EGR밸브가 강제적으로 닫힌 상태에서의 엔진의 작동을 유지하는 비정상상태딜레이단계와, 비정상작동값을 계산하는 비정상상태계산단계를 포함할 수 있다.According to another aspect of the present invention, in the step of calculating the measured value during the operation of the EGR valve, a stoichiometric air-fuel ratio control fixing step in which the intake air amount and the fuel injection amount are continuously adjusted so as to generate combustion in the stoichiometric air- A normal state delay step for maintaining the operation of the EGR valve and a steady state calculating step for calculating a normal operating value, An abnormal state delay step, and an abnormal state calculation step of calculating an abnormal operation value.
이러한 본 발명에 따른 배기가스재순환 밸브의 고장을 검출하는 방법에 의하면, 엔진 및 EGR에 구비되던 센서를 이용하여 종래에 비하여 더 정밀하게 EGR 고장을 검출할 수 있다.According to the method for detecting the failure of the exhaust gas recirculation valve according to the present invention, the EGR failure can be detected more precisely than in the prior art by using the sensor provided in the engine and the EGR.
또한, 고가의 EGR유량센서를 적용하지 않더라도 종래에 비하여 더 정밀하게 EGR 고장이 검출되므로, 총 제작비용이 저감된다. In addition, even if the EGR flow rate sensor of high price is not applied, since the EGR failure is detected more accurately than the conventional EGR flow sensor, the total manufacturing cost is reduced.
또한, 추가적인 장치 없이 종래 차량에 구비되던 센서를 이용하여 EGR 고장을 검출하게 되므로, 추가적인 장치를 설치하기 위한 설계가 배제되어 적용이 간편하다.In addition, since the EGR failure is detected by using a sensor provided in a conventional vehicle without an additional device, the design for installing an additional device is eliminated and the application is simple.
도 1은 본 발명의 일실시예의 배기가스재순환 밸브의 고장을 검출하는 방법의 절차도이다.1 is a flow diagram of a method for detecting a failure of an exhaust gas recirculation valve in an embodiment of the present invention.
이하 본 발명의 실시예를 첨부된 예시도면을 참조로 상세히 설명하며, 이러한 실시예는 일례로서 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자가 여러 가지 상이한 형태로 구현할 수 있으므로, 여기에서 설명하는 실시예에 한정되지 않는다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. The exemplary embodiments of the present invention may be embodied in many different forms without departing from the scope of the present invention. It is not limited to the embodiment.
도 1은 본 발명의 일실시예의 배기가스재순환 밸브의 고장을 검출하는 방법의 절차도이다.1 is a flow diagram of a method for detecting a failure of an exhaust gas recirculation valve in an embodiment of the present invention.
도 1에 도시된 바와 같이, 본 발명의 배기가스재순환 밸브의 고장을 검출하는 방법은, EGR밸브가 작동되고 EGR밸브의 작동상태와, 엔진의 rpm과 흡기압을 모니터링하는 EGR밸브 작동단계(S100)와, 이론공연비가 되도록 엔진의 연소제어 상태가 지속적으로 조절되고, 엔진의 정상작동값을 계산하는 EGR밸브 작동시 측정값 계산단계(S200)와, EGR밸브가 강제적으로 닫히는 EGR밸브폐쇄단계(S300)와, EGR밸브가 닫힌 상태로 엔진의 비정상작동값을 계산하는 EGR밸브 비작동시 측정값 계산단계(S400)와, 정상작동값과 비정상작동값의 차이가 임계값보다 작은지를 판단하는 작동값비교단계(S500)를 포함한다.1, a method for detecting a failure of an exhaust gas recirculation valve according to the present invention includes the steps of operating an EGR valve and operating the EGR valve to monitor the rpm and intake pressure of the engine (step S100 (Step S200) of calculating the normal operation value of the engine so that the combustion control state of the engine is continuously controlled so that the stoichiometric air-fuel ratio becomes the stoichiometric air-fuel ratio, and the EGR valve closing step An EGR valve inoperative measurement value calculation step (S400) for calculating an abnormal operation value of the engine with the EGR valve closed, an operation for determining whether the difference between the normal operation value and the abnormal operation value is smaller than a threshold value And a value comparison step S500.
또한, 정상작동값과 비정상작동값의 차이가 임계값보다 작을 때, EGR밸브가 비정상인 것으로 판단되는 것을 특징으로 한다. 임계값은 차량 및 엔진 특성에 따라 임의적으로 결정된다.Further, when the difference between the normal operation value and the abnormal operation value is smaller than the threshold value, it is determined that the EGR valve is abnormal. The threshold value is arbitrarily determined according to the characteristics of the vehicle and the engine.
EGR밸브 작동단계(S100) 전에, EGR밸브의 고장진단 횟수를 선택하는 고장진단모드선택단계가 수행된다. Before the EGR valve operating step (S100), a failure diagnosis mode selection step of selecting the number of times of failure diagnosis of the EGR valve is performed.
고장진단모드선택단계에서 EGR밸브 작동 중 고장진단 횟수가 1회인 1회모드, EGR밸브 작동 중 주기적으로 고장진단을 하게 되는 상시모드, 엔진의 운행조건에 따라 EGR밸브를 진단하게 되는 특정모드 중 어느 하나가 엔진의 냉각수온과 목표수온을 비교하여 선택된다.In the failure diagnosis mode selection step, one of the failure diagnosis times is one time during the EGR valve operation, the normal mode in which the failure diagnosis is periodically performed during the EGR valve operation, and the specific mode in which the EGR valve is diagnosed according to the engine operating conditions One is selected by comparing the cooling water temperature of the engine with the target water temperature.
고장진단모드선택단계에서 특정모드가 선택되면, EGR밸브 작동단계(S100) 수행 후, 엔진의 rpm과 토크가 설정치 범위 내인지를 판단하게 되고, 엔진의 rpm과 토크가 설정치 범위 내일 때, EGR밸브 작동시 측정값 도출단계가 수행된다.When the specific mode is selected in the failure diagnosis mode selection step, it is determined whether the rpm and torque of the engine are within the set value range after the EGR valve operation step (S100) is performed. When the rpm and the torque of the engine are within the set value range, In operation, a step of deriving a measured value is performed.
정상작동값과, 비정상작동값은 엔진의 rpm, 흡기압, EGR률을 변수로하는 함수값이다.The normal operation value and the abnormal operation value are function values having the rpm, intake pressure, and EGR rate of the engine as variables.
EGR밸브 작동시 측정값 계산단계(S200)는 엔진에서 이론공연비 상태로 연소가 발생되도록 흡기량과 연료분사량이 지속적으로 조절되는 이론공연비제어고정단계와, 엔진의 이론공연비 상태에서의 작동을 유지하는 정상상태딜레이단계와, 정상작동값을 계산하는 정상상태계산단계를 포함한다.In the step of calculating the measured value (S200) during the operation of the EGR valve, a stoichiometric air / fuel ratio control fixing step in which the intake air amount and the fuel injection amount are continuously adjusted so as to generate combustion in the stoichiometric air / fuel ratio state, A state delay step, and a steady state calculation step of calculating a normal operation value.
비작동시 측정값 계산단계는 EGR밸브가 강제적으로 닫힌 상태에서의 엔진의 작동을 유지하는 비정상상태딜레이단계와, 비정상작동값을 계산하는 비정상상태계산단계를 포함한다.The non-operating measurement calculation step includes an abnormal state delay step for maintaining the operation of the engine with the EGR valve forcedly closed, and an abnormal state calculation step for calculating an abnormal operation value.
S100: EGR밸브 작동단계
S200: EGR밸브 작동시 측정값 계산단계
S300: EGR밸브폐쇄단계
S400: EGR밸브 비작동시 측정값 계산단계
S500: 작동값비교단계S100: EGR valve operating phase
S200: Calculation step of EGR valve operation
S300: EGR valve closing step
S400: Calculation step of EGR valve inoperative
S500: Operation value comparison step
Claims (7)
이론공연비가 되도록 상기 엔진의 연소제어 상태가 지속적으로 조절되고, 상기 엔진의 정상작동값을 계산하는 EGR밸브 작동시 측정값 계산단계;
상기 EGR밸브가 강제적으로 닫히는 EGR밸브폐쇄단계;
상기 EGR밸브가 닫힌 상태로 상기 엔진의 비정상작동값을 계산하는 EGR밸브 비작동시 측정값 계산단계;
상기 정상작동값과 상기 비정상작동값의 차이가 임계값보다 작은지를 판단하는 작동값비교단계;를 포함하며,
상기 정상작동값과 상기 비정상작동값의 차이가 상기 임계값보다 작을 때, 상기 EGR밸브가 비정상인 것으로 판단되는 것을 특징으로 하는 배기가스재순환 밸브의 고장을 검출하는 방법.An EGR valve actuation step of operating the EGR valve and monitoring the operating state of the EGR valve, rpm and intake pressure of the engine;
Calculating a measured value at the time of operation of the EGR valve, the combustion control state of the engine being continuously adjusted so as to be the stoichiometric air / fuel ratio, and calculating the normal operation value of the engine;
Closing the EGR valve forcibly closing the EGR valve;
Calculating an EGR valve non-operating measurement value to calculate an abnormal operating value of the engine with the EGR valve closed;
And an operation value comparison step of determining whether a difference between the normal operation value and the abnormal operation value is smaller than a threshold value,
And when the difference between the normal operation value and the abnormal operation value is less than the threshold value, it is determined that the EGR valve is abnormal.
상기 EGR밸브 작동단계 전에,
상기 EGR밸브의 고장진단 횟수를 선택하는 고장진단모드선택단계가 수행되는 것을 특징으로 하는 배기가스재순환 밸브의 고장을 검출하는 방법.The method according to claim 1,
Before the EGR valve actuation step,
And a failure diagnosis mode selecting step of selecting a failure diagnosis number of times of the EGR valve is performed.
상기 고장진단모드선택단계에서
상기 EGR밸브 작동 중 고장진단 횟수가 1회인 1회모드,
상기 EGR밸브 작동 중 주기적으로 고장진단을 하게 되는 상시모드,
상기 엔진의 운행조건에 따라 상기 EGR밸브를 진단하게 되는 특정모드 중 어느 하나가 상기 엔진의 냉각수온과 목표수온을 비교하여 선택되는 것을 특징으로 하는 배기가스재순환 밸브의 고장을 검출하는 방법.3. The method of claim 2,
In the failure diagnosis mode selection step
A mode in which the number of times of trouble diagnosis during the EGR valve operation is once,
A normal mode in which a failure diagnosis is periodically performed during operation of the EGR valve,
Wherein any one of the specific modes for diagnosing the EGR valve according to the operating condition of the engine is selected by comparing the cooling water temperature of the engine with the target water temperature.
상기 고장진단모드선택단계에서 상기 특정모드가 선택되면,
상기 EGR밸브 작동단계 수행 후, 상기 엔진의 rpm과 토크가 설정치 범위 내인지를 판단하게 되고,
상기 엔진의 rpm과 토크가 설정치 범위 내일 때, 상기 EGR밸브 작동시 측정값 도출단계가 수행되는 것을 특징으로 하는 배기가스재순환 밸브의 고장을 검출하는 방법.The method of claim 3,
When the specific mode is selected in the failure diagnosis mode selection step,
After the step of operating the EGR valve, it is determined whether the rpm and the torque of the engine are within a set value range.
Wherein when the rpm and the torque of the engine are within a set value range, a deriving step of the EGR valve operation is performed.
상기 정상작동값과, 상기 비정상작동값은
상기 엔진의 rpm, 상기 흡기압, EGR률을 변수로하는 함수값인 것을 특징으로 하는 배기가스재순환 밸브의 고장을 검출하는 방법.The method according to claim 1,
The normal operation value and the abnormal operation value
Wherein the exhaust gas recirculation valve is a function value having rpm, intake air pressure, and EGR rate of the engine as variables.
상기 EGR밸브 작동시 측정값 계산단계는
상기 엔진에서 이론공연비 상태로 연소가 발생되도록 흡기량과 연료분사량이 지속적으로 조절되는 이론공연비제어고정단계와,
상기 엔진의 이론공연비 상태에서의 작동을 유지하는 정상상태딜레이단계와,
상기 정상작동값을 계산하는 정상상태계산단계를 포함하는 것을 특징으로 하는 배기가스재순환 밸브의 고장을 검출하는 방법.The method according to claim 1,
The step of calculating the measured value during the EGR valve operation
A stoichiometric air-fuel ratio control fixing step in which the intake air amount and the fuel injection amount are continuously adjusted so as to generate combustion in the stoichiometric air-
A steady-state delay step of maintaining an operation in the stoichiometric air-fuel ratio state of the engine,
And a steady-state calculation step of calculating said normal operation value. ≪ Desc / Clms Page number 19 >
상기 비작동시 측정값 계산단계는
상기 EGR밸브가 강제적으로 닫힌 상태에서의 상기 엔진의 작동을 유지하는 비정상상태딜레이단계와,
상기 비정상작동값을 계산하는 비정상상태계산단계를 포함하는 것을 특징으로 하는 배기가스재순환 밸브의 고장을 검출하는 방법.The method according to claim 1,
The non-operational measurement value calculation step
An abnormal state delay step of maintaining the operation of the engine in a state in which the EGR valve is forcibly closed,
And calculating an abnormal operation value of the exhaust gas recirculation valve.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180076152A (en) * | 2016-12-27 | 2018-07-05 | 주식회사 현대케피코 | Method for monitoring egr system |
| KR20180138360A (en) | 2017-06-21 | 2018-12-31 | 이래에이엠에스 주식회사 | Control method for egr valve module |
| GB2570336A (en) * | 2018-01-22 | 2019-07-24 | Ford Global Tech Llc | An exhaust gas recirculation valve diagnostic method |
| KR20220028063A (en) * | 2020-03-09 | 2022-03-08 | 가네코 산교 가부시키가이샤 | solenoid valve |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180076152A (en) * | 2016-12-27 | 2018-07-05 | 주식회사 현대케피코 | Method for monitoring egr system |
| KR20180138360A (en) | 2017-06-21 | 2018-12-31 | 이래에이엠에스 주식회사 | Control method for egr valve module |
| GB2570336A (en) * | 2018-01-22 | 2019-07-24 | Ford Global Tech Llc | An exhaust gas recirculation valve diagnostic method |
| GB2570336B (en) * | 2018-01-22 | 2020-03-04 | Ford Global Tech Llc | An exhaust gas recirculation valve diagnostic method |
| US10704506B2 (en) | 2018-01-22 | 2020-07-07 | Ford Global Technologies, Llc | Methods and systems for EGR valve diagnostics |
| KR20220028063A (en) * | 2020-03-09 | 2022-03-08 | 가네코 산교 가부시키가이샤 | solenoid valve |
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