KR20190053598A - Method for Sensing Fuel Volatility Deviation, Method for Learning Fuel Volatility and Method for Compensating Air-Fuel Ratio Control Thereof - Google Patents

Method for Sensing Fuel Volatility Deviation, Method for Learning Fuel Volatility and Method for Compensating Air-Fuel Ratio Control Thereof Download PDF

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KR20190053598A
KR20190053598A KR1020170149649A KR20170149649A KR20190053598A KR 20190053598 A KR20190053598 A KR 20190053598A KR 1020170149649 A KR1020170149649 A KR 1020170149649A KR 20170149649 A KR20170149649 A KR 20170149649A KR 20190053598 A KR20190053598 A KR 20190053598A
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fuel
volatility
deviation
learning
air
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KR1020170149649A
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KR102383261B1 (en
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한민규
여인주
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현대자동차주식회사
기아자동차주식회사
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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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
    • 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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
    • F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
    • 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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
    • F02D2041/1411—Introducing closed-loop corrections characterised by the control or regulation method using a finite or infinite state machine, automaton or state graph for controlling or modelling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/06—Fuel or fuel supply system parameters

Abstract

The present invention relates to a method for sensing fuel volatility deviation changed according to fueling and a method for learning fuel volatility using the same. In addition, the present invention relates to a method for compensating air-fuel ratio control according to the learned fuel volatility. The present invention provides a method for sensing the fuel volatility deviation, in which behavior of an air-fuel control compensation coefficient is measured for a set time when a vehicle starts under room temperature starting condition after fueling to calculate the fuel volatility deviation changed according to the fueling. On the one hand, the method for learning the fuel volatility deviation according to the present invention, calculates the fuel volatility deviation according to the method for sensing the fuel volatility deviation and stores the calculated fuel volatility deviation as a volatility learning value of newly filled fuel if a fuel volatility learning possibility condition is satisfied under the room temperature starting condition after fueling. On the other hand, the method for compensating for the air-fuel ratio control according to the fuel volatility deviation according to the present invention compensates the air-fuel control compensation coefficient according to the learning value stored by the method for learning the fuel volatility deviation to compensate for the increase and decrease of a start fuel amount and warm-up fuel amount from the next vehicle start.

Description

연료 휘발성 편차 감지 방법, 이를 이용한 연료 휘발성 학습 방법 및 공연비 제어 보상 방법{Method for Sensing Fuel Volatility Deviation, Method for Learning Fuel Volatility and Method for Compensating Air-Fuel Ratio Control Thereof}TECHNICAL FIELD [0001] The present invention relates to a fuel volatility deviation detection method, a fuel volatility learning method and an air-fuel ratio control compensation method using the same.

본 발명은 주유에 따라 변화되는 연료의 휘발성 편차를 감지하는 방법 및 이를 이용한 연료 휘발성 학습 방법에 관한 것이다. 또한, 본 발명은 학습된 연료의 휘발성에 따라 공연비 제어를 보상하는 방법에 관한 것이다.The present invention relates to a method for detecting volatility variation of a fuel which changes according to fuel injection, and a fuel volatility learning method using the same. The present invention also relates to a method for compensating the air-fuel ratio control according to the volatility of the learned fuel.

주유 후 주입된 새로운 연료에 의해 연료 탱크 내 연료의 휘발성은 변화될 수 있는데, 연료의 휘발성이 낮을 경우 엔진 연소실에서 연소 불안정이 발생하게 되고, 이에 따라 시동 지연, 시동 완료 후 아이들 안정성 불량 및 가속 불량 등 차량의 운전성이 악화되게 된다.The volatility of the fuel in the fuel tank may be changed by the new fuel injected after the fuel injection. When the volatility of the fuel is low, the combustion instability occurs in the engine combustion chamber. As a result, So that the driving performance of the vehicle becomes worse.

이를 해결하기 위한 종래기술은 시동 완료 후 엔진 러프니스(Roughness)를 감지하고, 러프니스가 일정 임계값(Threshold) 이상일 경우에 연료량을 증량하여 연소 안정 및 차량의 운전성을 향상시켰으나, 증량 보정으로만 휘발성 보상을 하게되어 연료 휘발성에 따른 시동 시 발생 문제점을 완전하게 해결하지는 못하였으며, 특히 발진 시 불필요하게 농후한 연료를 분사하게 되어 흡기 매니폴드 및 쓰로틀 바디 등에 카본 오염을 발생시키는 등의 필드 문제까지 야기하게 되는 문제점을 가지고 있었다.The prior art for solving this problem is to detect the engine roughness after the completion of starting and improve the combustion stability and the driving performance of the vehicle by increasing the fuel amount when the roughness is equal to or above a certain threshold value, In particular, it is not possible to completely solve the problems caused by the volatility of the fuel due to the volatility compensation. Particularly, since the unnecessary rich fuel is injected at the oscillation, it causes the carbon contamination on the intake manifold and the throttle body. Of the total number of people.

본 발명은 위와 같은 문제점을 해결하기 위하여 안출된 것으로, 본 발명의 목적은 연료 휘발성에 따른 시동 지연 및 불량 문제점을 해결하기 위해 연료 휘발성 편차 감지 방법, 이를 이용한 연료 휘발성 학습 방법 및 공연비 제어 보상 방법을 제공하는데 있다.SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a fuel volatility deviation detection method, a fuel volatility learning method and an air- .

위와 같은 과제를 해결하기 위한 본 발명에 따른 연료 휘발성 편차 감지 방법은 상온 시동 조건에서 차량 시동 시에 일정시간 동안 공연비 제어 보정계수의 거동을 계측함으로써 주유에 의해 변화된 연료의 휘발성 편차를 계산하는 것을 특징으로 한다.The method for detecting fuel volatility deviation according to the present invention for solving the above problems is characterized in that the volatility deviation of the fuel changed by gasoline is calculated by measuring the behavior of the air-fuel ratio control correction coefficient for a certain period of time at the start of the vehicle under the normal- .

바람직하게, 상기 일정시간은 공연비 제어가 오픈 루프 제어에서 클로즈드 루프 제어로 전환된 직후부터 상기 보정계수의 변화에 처음으로 변곡이 생기는 시점까지일 수 있다.Preferably, the predetermined time may be from immediately after the air-fuel ratio control is switched from the open-loop control to the closed-loop control to the time when the first-time inflection occurs in the change of the correction coefficient.

바람직하게, 상기 연료의 휘발성 편차는 상기 보정계수의 최대값 및 최소값을 이용하여 계산될 수 있다.Preferably, the volatility deviation of the fuel can be calculated using the maximum and minimum values of the correction coefficient.

바람직하게, 상기 연료의 휘발성 편차는 상기 보정계수의 변화 기울기를 이용하여 계산될 수 있다.Preferably, the volatility deviation of the fuel can be calculated using the slope of the change of the correction coefficient.

바람직하게, 상기 연료의 휘발성 편차는 상기 보정계수의 거동과 기준 연료에 대해 모델링된 기준 보정계수 거동과의 차이를 이용하여 계산될 수 있다.Preferably, the volatility deviation of the fuel can be calculated using the difference between the behavior of the correction coefficient and the reference correction coefficient behavior modeled for the reference fuel.

한편, 위와 같은 과제를 해결하기 위한 본 발명에 따른 연료 휘발성 편차 학습 방법은 상온 시동 조건에서 차량 시동 시 연료 휘발성 학습 가능 조건을 만족하면, 상기 연료 휘발성 편차 감지 방법에 따라 연료 휘발성 편차를 계산하고, 상기 계산된 연료 휘발성 편차를 주유된 새로운 연료의 휘발성 학습치로 저장하는 것을 특징으로 한다.According to another aspect of the present invention, there is provided a fuel volatility deviation learning method for calculating fuel volatility deviation according to the fuel volatility deviation detection method, And the calculated fuel volatility deviation is stored as the volatility learning value of the new fuel injected.

바람직하게, 상기 연료 휘발성 학습 가능 조건은 주유 정보 갱신 여부, 공연비 클로즈드 루프 제어 진입 여부, 냉시동 여부 및 시동 후 아이들 상태 유지 여부로 결정될 수 있다.Preferably, the fuel volatility learning condition may be determined by whether the fueling information is updated, whether the air-fuel ratio is closed loop control, whether the engine is cold, or whether the idle state is maintained after startup.

다른 한편, 위와 같은 과제를 해결하기 위한 본 발명에 따른 연료 휘발성 편차에 따른 공연비 제어 보상 방법은 상기 연료 휘발성 편차 학습 방법에 의하여 저장된 학습치에 따라 공연비 제어 보정계수를 보상하여, 차기 차량 시동 시부터 시동 연료량과 시동 직후 및 웜업 연료량을 증량 및 감량 보정하도록 하는 것을 특징으로 한다.According to another aspect of the present invention, there is provided a method for compensating for air-fuel ratio control according to a fuel volatility deviation, comprising the steps of compensating an air-fuel ratio control correction coefficient according to a learning value stored by the fuel volatility deviation learning method, The startup fuel amount, the immediately after startup, and the warm-up fuel amount are corrected to be increased and decreased.

본 발명은 주유할 때마다 연료 휘발성 학습을 통해 해당 연료의 휘발성 편차에 대한 연료 보정량을 차기 시동 시부터 곧바로 적용시킬 수 있어 저휘발성 및 고휘발성 연료가 연소에 너무 농후하거나 희박하여 발생할 수 있는 시동 지연, 시동 완료 후 아이들 안정성 불량 및 가속 불량 등 엔진 연소실에서의 연소 불안정으로 악화될 수 있는 차량의 운전성을 개선할 수 있다.The present invention can apply the fuel correction amount for the volatility deviation of the fuel immediately after starting from the start by learning the fuel volatility every time the fuel is injected so that the startup delay which is caused by the low volatility and the high volatile fuel becoming too rich or lean to the combustion It is possible to improve the drivability of the vehicle which can be exacerbated by unstable combustion in the engine combustion chamber, such as malfunction of the idle stability after completion of starting and acceleration failure.

도 1은 본 발명의 순서도이다.1 is a flowchart of the present invention.

아래에서는 본 발명을 첨부된 도면을 참조하여 상세히 설명한다. 다만, 본 발명의 요지를 불필요하게 흐릴 수 있는 공지 기능 및 구성에 대한 상세한 설명은 생략한다.BRIEF DESCRIPTION OF THE DRAWINGS The invention will be described in detail below with reference to the accompanying drawings. However, the detailed description of known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

도 1은 본 발명의 순서도이다. 본 발명은 먼저 차량의 연료 탱크에 새로운 연료를 일정량 이상 주유했을 경우, 연료 휘발성 편차 학습 필요 조건으로서 엔진 제어부에 주유 정보를 저장한다. 예를 들어, 상기 주유 정보는 시동 오프시 엔진 제어부의 NVRAM에 저장될 수 있다.1 is a flowchart of the present invention. The present invention first stores gasoline information in the engine control unit as a fuel volatility deviation learning requirement when a new fuel is injected into the fuel tank of the vehicle over a predetermined amount. For example, the fueling information may be stored in the NVRAM of the engine control unit at startup.

이후 다음 시동시(S10)에 주유 정보가 갱신된 것으로 확인되면(S20), 연료 휘발성 학습치를 초기화하고(S30), 연료 휘발성 학습 가능 조건이 만족되는지 판단한다(S40).If it is confirmed that fuel oil information has been updated at the next startup (S10), the fuel volatility learning value is initialized (S30), and it is determined whether the fuel volatility learning enabling condition is satisfied (S40).

상기 연료 휘발성 학습 가능 조건은 주유 정보 갱신 여부, 공연비 클로즈드 루프 제어 진입 여부, 냉시동 여부, 시동 후 아이들 상태 유지 여부, 관련 신호의 정상 여부(고장 유무) 등으로 결정될 수 있다.The fuel volatility learning condition may be determined by whether or not the fueling information is updated, whether the air-fuel ratio is closed loop control, whether the engine is cold or not, whether the idle state is maintained after startup, whether the related signal is normal or not.

예를 들어, 주유 정보 갱신 여부는 상기 엔진 제어부의 NVRAM에 저장된 값을 센싱하여 확인할 수 있으며, 주유 정보가 갱신되었으면 연료 휘발성 학습이 가능한 것으로 판단한다.For example, whether to update the fueling information can be confirmed by sensing the value stored in the NVRAM of the engine control unit. If the fueling information is updated, it is determined that the fuel volatility learning is possible.

또한, 공연비 클로즈드 루프 제어 진입 여부는 산소센서의 작동 여부를 센싱하여 확인할 수 있으며, 공연비 클로즈드 루프 제어에 진입되었으면 연료 휘발성 학습이 가능한 것으로 판단한다.Further, whether or not the air-fuel ratio closed loop control is entered can be confirmed by sensing whether the oxygen sensor is operating or not, and it is determined that fuel volatility learning is possible when the air-fuel ratio closed loop control is entered.

또한, 냉시동 여부는 냉각수온, 흡기온, 외기온, 속타임(Soak Time) 등의 정보를 센싱하여 확인할 수 있으며, 냉시동 조건을 만족하면 연료 휘발성 학습이 가능한 것으로 판단한다.In addition, the cold start can be confirmed by sensing information such as coolant temperature, intake air temperature, outside temperature, soak time, etc., and it is judged that fuel volatility learning is possible if the cold start condition is satisfied.

또한, 시동 후 아이들 상태 유지 여부는 전기부하, 변속, 엔진회전수 등의 정보를 센싱하여 확인할 수 있으며, 시동 후 아이들 상태가 유지되고 있으면 연료 휘발성 학습이 가능한 것으로 판단한다.In addition, whether or not the idle state is maintained after starting can be confirmed by sensing information such as electric load, speed change, engine speed, and the like, and it is determined that fuel volatility learning is possible if the idle state is maintained after starting.

이때, 상기 연료 휘발성 학습 조건들 중 어느 하나라도 만족되지 않으면, 연료 휘발성 학습이 가능하지 않은 것으로 판단한다.At this time, if any of the fuel volatility learning conditions is not satisfied, it is determined that fuel volatility learning is not possible.

연료 휘발성 학습이 가능한 것으로 판단되면, 일정시간 동안 공연비 제어 보정계수의 거동을 계측함으로써 연료 휘발성 편차를 계산하고 이를 학습치로 저장한다(S50). 공연비 제어 보정계수는 산소센서의 신호를 피드백하여 이론 공연비로 제어되도록 연료량을 보정하는 계수이다.If it is determined that the fuel volatility learning is possible, the fuel volatility deviation is calculated by measuring the behavior of the air-fuel ratio control correction coefficient for a predetermined period of time and stored as a learning value (S50). The air-fuel ratio control correction coefficient is a coefficient for correcting the amount of fuel so that the signal of the oxygen sensor is fed back to be controlled to the stoichiometric air-fuel ratio.

여기서, 일정시간은 공연비 제어가 오픈 루프 제어에서 클로즈드 루프 제어로 전환된 직후부터 상기 보정계수의 변화에 처음으로 변곡이 생기는 시점까지일 수 있다.Here, the predetermined time may be from immediately after the air-fuel ratio control is switched from the open-loop control to the closed-loop control to the time when the first-time inflection occurs in the change of the correction coefficient.

이때, 연료의 휘발성 편차는 상기 보정계수의 최대값 및 최소값, 또는 상기 보정계수의 변화 기울기를 이용하여 계산될 수 있다.At this time, the volatility deviation of the fuel can be calculated using the maximum value and the minimum value of the correction coefficient, or the change gradient of the correction coefficient.

또한, 상기 연료의 휘발성 편차는 상기 보정계수의 거동과 기준 연료에 대해 모델링된 기준 보정계수 거동과의 차이를 이용하여 계산될 수도 있다.Further, the volatility deviation of the fuel may be calculated using the difference between the behavior of the correction coefficient and the reference correction coefficient behavior modeled for the reference fuel.

한편, 연료 휘발성 편차 학습 수행 시 연료 휘발성 학습 가능 조건이 만족되지 않으면, 예를 들어 아이들 공회전 운전이 아닌 차량이 급격한 전기부하 및 변속, 운전자의 가속 페달 조작이 있을 경우에는, 해당 취득 휘발성 편차 학습치는 사용하지 않으며, 특정 연료량 소모 전까지는 상기 휘발성 편차 학습 필요 및 학습 가능 조건이 만족될 때 재학습을 시도하도록 한다.On the other hand, if the fuel volatility learning enabling condition is not satisfied when performing the fuel volatility deviation learning, for example, when there is a sudden electric load and a shift, or an accelerator pedal operation of the driver, rather than an idle idling operation, And re-learning is attempted when the volatile deviation learning necessity and learning condition are satisfied before the specific fuel amount is consumed.

취득한 휘발성 편차 학습치는 연료 RVP 특성 및 차량 시동성 시험 결과에 따른 특성 커브를 매핑하여 차기 시동 시부터 시동 연료량과 시동 직후 및 웜업 연료량의 증량 및 감량 보정에 사용한다(S60, S70).The obtained learned value of the volatility deviation is used for the correction of the increase and decrease of the starting fuel amount, the immediately after starting, and the warming up fuel amount at the next starting by mapping the characteristic curve according to the fuel RVP characteristic and the vehicle starting ability test result at steps S60 and S70.

본 명세서와 첨부된 도면에 개시된 실시예들은 본 발명의 기술적 사상을 쉽게 설명하기 위한 목적으로 사용된 것일 뿐, 특허청구범위에 기재된 본 발명의 범위를 제한하기 위하여 사용된 것은 아니다. 따라서, 본 기술분야의 통상의 지식을 가진 자라면 이로부터 다양한 변형 및 균등한 타 실시예가 가능하다는 점을 이해할 것이다.The embodiments disclosed in the present specification and the accompanying drawings are only used for the purpose of easily explaining the technical idea of the present invention and are not used to limit the scope of the present invention described in claims. Therefore, those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention.

S10: 차량 시동 단계
S20: 주유정보 갱신 확인 단계
S30: 연료 휘발성 학습치 초기화 단계
S40: 연료 휘발성 학습 가능 조건 판단 단계
S50: 연료 휘발성 편차 계산 및 학습치 저장 단계
S60: 시동 연료량 보정 단계
S70: 시동 직후 및 웜업 연료량 보정 단계S10: Vehicle startup phase
S20: Step of confirming renewal of gasoline information
S30: Fuel volatility learning value initialization step
S40: Fuel volatility learning condition determination step
S50: Fuel volatility deviation calculation and learning value storage step
S60: Starting fuel amount correction step
S70: Immediately after startup and in the warm-up fuel amount correction step

Claims (8)

상온 시동 조건에서 차량 시동 시에 일정시간 동안 공연비 제어 보정계수의 거동을 계측함으로써 주유에 의해 변화된 연료의 휘발성 편차를 계산하는 것을 특징으로 하는 연료 휘발성 편차 감지 방법.And calculating the volatility deviation of the fuel changed by the fuel injection by measuring the behavior of the air-fuel ratio control correction coefficient for a certain period of time at the start of the vehicle under normal temperature starting conditions. 청구항 1에 있어서,
상기 일정시간은 공연비 제어가 오픈 루프 제어에서 클로즈드 루프 제어로 전환된 직후부터 상기 보정계수의 변화에 처음으로 변곡이 생기는 시점까지인 것을 특징으로 하는 연료 휘발성 편차 감지 방법.The method according to claim 1,
Wherein the predetermined time is from the time immediately after the air-fuel ratio control is switched from the open-loop control to the closed-loop control until the first time the air-fuel ratio control is changed to the change of the correction coefficient. 청구항 2에 있어서,
상기 연료의 휘발성 편차는 상기 보정계수의 최대값 및 최소값을 이용하여 계산되는 것을 특징으로 하는 연료 휘발성 편차 감지 방법.The method of claim 2,
Wherein the volatile deviation of the fuel is calculated using the maximum value and the minimum value of the correction coefficient. 청구항 2에 있어서,
상기 연료의 휘발성 편차는 상기 보정계수의 변화 기울기를 이용하여 계산되는 것을 특징으로 하는 연료 휘발성 편차 감지 방법.The method of claim 2,
Wherein the volatile deviation of the fuel is calculated using the slope of the correction coefficient. 청구항 2에 있어서,
상기 연료의 휘발성 편차는 상기 보정계수의 거동과 기준 연료에 대해 모델링된 기준 보정계수 거동과의 차이를 이용하여 계산되는 것을 특징으로 하는 연료 휘발성 편차 감지 방법.The method of claim 2,
Wherein the volatility deviation of the fuel is calculated using the difference between the behavior of the correction factor and the reference correction coefficient behavior modeled for the reference fuel. 상온 시동 조건에서 차량 시동 시 연료 휘발성 학습 가능 조건을 만족하면, 청구항 1 내지 5 중 어느 한 항의 연료 휘발성 편차 감지 방법에 따라 연료 휘발성 편차를 계산하고,
상기 계산된 연료 휘발성 편차를 주유된 새로운 연료의 휘발성 학습치로 저장하는 것을 특징으로 하는 연료 휘발성 편차 학습 방법.Calculating the fuel volatility deviation according to the fuel volatility deviation detection method according to any one of claims 1 to 5 when the fuel volatility learning condition is satisfied at the vehicle start in the room temperature starting condition,
And storing the calculated fuel volatility deviation as a volatility learning value of new fuel injected. 청구항 6에 있어서,
상기 연료 휘발성 학습 가능 조건은 주유 정보 갱신 여부, 공연비 클로즈드 루프 제어 진입 여부, 냉시동 여부 및 시동 후 아이들 상태 유지 여부로 결정되는 것을 특징으로 하는 연료 휘발성 편차 학습 방법.The method of claim 6,
Wherein the fuel volatility learning condition is determined by whether or not the fueling information is updated, whether the air-fuel ratio is closed loop control, whether the engine is cold or not, and whether the idle state is maintained after starting. 청구항 6에 따른 연료 휘발성 편차 학습 방법에 의하여 저장된 학습치에 따라 공연비 제어 보정계수를 보상하여, 차기 차량 시동 시부터 시동 연료량과 시동 직후 및 웜업 연료량을 증량 및 감량 보정하도록 하는 것을 특징으로 하는 연료 휘발성 편차에 따른 공연비 제어 보상 방법.Fuel ratio control correction coefficient is compensated in accordance with the learning value stored by the fuel volatility deviation learning method according to claim 6 so that the starting fuel amount, the immediately after starting, and the warming up fuel amount are increased and decreased in amount from the start of the next vehicle. Fuel Fuel Control Compensation Method Based on Deviation.
KR1020170149649A 2017-11-10 2017-11-10 Method for Sensing Fuel Volatility Deviation, Method for Learning Fuel Volatility and Method for Compensating Air-Fuel Ratio Control Thereof KR102383261B1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0326841A (en) * 1989-06-23 1991-02-05 Nissan Motor Co Ltd Fuel injector for engine
JP2887056B2 (en) * 1993-11-12 1999-04-26 三菱電機株式会社 Fuel property determination device for internal combustion engine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0326841A (en) * 1989-06-23 1991-02-05 Nissan Motor Co Ltd Fuel injector for engine
JP2887056B2 (en) * 1993-11-12 1999-04-26 三菱電機株式会社 Fuel property determination device for internal combustion engine

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