KR101188980B1 - Method for modeling of combination ratio of LPG fuel - Google Patents
Method for modeling of combination ratio of LPG fuel Download PDFInfo
- Publication number
- KR101188980B1 KR101188980B1 KR1020090114947A KR20090114947A KR101188980B1 KR 101188980 B1 KR101188980 B1 KR 101188980B1 KR 1020090114947 A KR1020090114947 A KR 1020090114947A KR 20090114947 A KR20090114947 A KR 20090114947A KR 101188980 B1 KR101188980 B1 KR 101188980B1
- Authority
- KR
- South Korea
- Prior art keywords
- fuel
- composition ratio
- fuel ratio
- ratio
- difference
- Prior art date
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/02—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with gaseous fuels
- F02D19/026—Measuring or estimating parameters related to the fuel supply system
- F02D19/029—Determining density, viscosity, concentration or composition
-
- 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
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
- F02D41/0295—Control according to the amount of oxygen that is stored on the exhaust gas treating apparatus
-
- 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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
- F02D41/2454—Learning of the air-fuel ratio control
-
- 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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2477—Methods of calibrating or learning characterised by the method used for learning
- F02D41/248—Methods of calibrating or learning characterised by the method used for learning using a plurality of learned values
-
- 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
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- 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)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
본 발명은 엘피지 연료의 조성비 모델링 방법에 관한 것으로, 보다 상세하게는, LPG차량의 연료 조성비를 제어함에 있어, 설정된 조건에 의한 조성비 검출이 완료되기 전까지, 간접적으로 모델링하여 근사된 조성비를 산출하고, 이에 따라 분사연료량을 보정하도록 한 것이다. 본 발명에 따르면, LPG차량의 연료탱크 내 온도센서가 정상적으로 작동하지 않는 경우 또는 연료탱크 내 온도센서가 없는 경우에도, 연료가 충전될 때마다 목표로 하는 연료분사량의 보정이 정확히 이루어지도록, 공급되는 연료의 조성비를 간접적으로 모델링함으로써, 긴급한 연료의 조성비 변경에 신속한 대응이 가능하도록 하는 효과가 있다. 또한, 배출되는 배기가스에 의한 공연비를 일정하게 제어할 수 있어, 유해한 배기가스의 증가를 줄일 수 있음은 물론, LPG차량 및 엔진제어 등에 대한 신뢰성을 향상시켜, 해당 제품의 경쟁력을 향상시키는 효과가 있다.The present invention relates to a composition ratio modeling method of the LPG fuel, and more particularly, in controlling the fuel composition ratio of the LPG vehicle, until the composition ratio detection under the set conditions is completed, indirectly modeled to calculate the approximate composition ratio, Accordingly, the amount of injected fuel is to be corrected. According to the present invention, even when the temperature sensor in the fuel tank of the LPG vehicle does not operate normally or there is no temperature sensor in the fuel tank, it is supplied to correct the target fuel injection amount every time the fuel is charged. By indirectly modeling the composition ratio of the fuel, there is an effect of enabling a quick response to an urgent fuel composition ratio change. In addition, since the air-fuel ratio by the exhaust gas can be controlled constantly, it is possible to reduce the increase of harmful exhaust gas, as well as to improve the reliability of LPG vehicles and engine control, thereby improving the competitiveness of the product. have.
LPG, 공연비, 모델링, 조성비, 학습, 보정 LPG, performance ratio, modeling, composition ratio, learning, correction
Description
본 발명은 엘피지 연료의 조성비 모델링 방법에 관한 것으로서, 보다 상세하게는 LPG차량의 연료 조성비를 제어함에 있어, 연료탱크 내에 설치된 온도센서가 정상적으로 작동되지 못하는 경우 또는 연료 탱크 내 온도센서가 설치되지 않는 경우, 설정된 조건에 의한 조성비 검출이 완료되기 전까지 간접적으로 모델링하여 근사된 조성비를 산출하고, 이에 따라 분사연료량을 보정함으로써, 공연비를 제어할 수 있는 엘피지 연료의 조성비 모델링 방법에 관한 것이다.The present invention relates to a composition ratio modeling method of the LPG fuel, and more particularly in controlling the fuel composition ratio of the LPG vehicle, when the temperature sensor installed in the fuel tank does not operate normally or the temperature sensor in the fuel tank is not installed In addition, the present invention relates to a composition ratio modeling method of the LLP fuel which can control the air-fuel ratio by calculating an approximate composition ratio by indirectly modeling until the composition ratio detection under the set conditions is completed and correcting the injection fuel amount.
일반적으로, 자동차(이하, 차량과 혼용함)라 함은 원동기를 사용하여 궤조 또는 가선에 의하지 않고 운전되는 운송기계로서, 그 구성으로는 엔진, 연료공급장치, 동력전달장치, 현가 및 조향장치, 제동장치, 배출장치, 공조장치, 냉각 및 윤활장치 등이 있으며, 주로 승객이나 화물의 운송을 위하여 사용되고 있다.In general, a vehicle (hereinafter referred to as a vehicle) refers to a transport machine that is driven by a prime mover without a railroad track or railroad line, and includes an engine, a fuel supply device, a power transmission device, a suspension and steering device, Braking system, exhaust system, air conditioning system, cooling and lubrication system, etc., are mainly used for the transportation of passengers or cargo.
그리고, 차량은 그 연료의 종류에 따라 디젤차량, 가솔린차량, LPG차량 등으로 구분되며, 최근에는 환경문제 등으로 인하여 LPG차량이 증가되고 있는 추세이다.The vehicle is classified into a diesel vehicle, a gasoline vehicle, an LPG vehicle, and the like according to the type of fuel. Recently, LPG vehicles are increasing due to environmental problems.
이러한 LPG차량에는 LPI(LPG Injection)라고 하는 시스템이 탑재되는데, LPI는 봄베(연료탱크) 내에 장착된 연료펌프를 이용하여 기체연료를 액상으로 가압하여 이를 인젝터를 통해 각 실린더에 분사하도록 되어 있다.The LPG vehicle is equipped with a system called LPI (LPG Injection), which uses a fuel pump mounted in a cylinder (fuel tank) to pressurize gaseous fuel into a liquid phase and inject it into each cylinder through an injector.
이때, 봄베에 충전된 LPG의 조성비에 따라 LPG 연료의 밀도가 변화하게 되고 실제 연료 분사량이 달라지게 되는데 이를 분사량에 보정해 주지 않으면 목표 공기와 연료의 혼합비가 틀어져 시동성 및 가속성이 저하되고 유해 배기가스가 증가하게 되는 문제점이 있다. At this time, the density of LPG fuel is changed according to the composition ratio of LPG filled in the cylinder and the actual fuel injection amount is changed. If this is not corrected, the mixing ratio of the target air and fuel is changed so that the startability and acceleration are deteriorated, and the harmful exhaust gas is reduced. There is a problem that is increased.
따라서, 대부분의 LPG 차량(LPI 시스템)은 연료탱크에 설치된 온도센서를 통해 연료 온도를 감지하여 LPG 연료 조성비를 검출하거나 또는 온도센서가 없는 경우, 특정 조건에서 LPG연료의 조성비를 검출하여 목표로 하는 흡입공기에 대한 분사연료의 조성비를 제어하도록 분사연료를 보정하게 된다.Therefore, most LPG vehicles (LPI systems) detect the fuel temperature through the temperature sensor installed in the fuel tank to detect the LPG fuel composition ratio or, if there is no temperature sensor, to detect the LPG fuel composition ratio under specific conditions The injection fuel is corrected to control the composition ratio of the injection fuel to the intake air.
만약, 연료탱크내 온도센서가 정상적으로 작동하지 않는 경우나 온도센서가 없는 경우에는 먼저 차량의 시동이 꺼진 상태에서 일정시간이상 주차조건을 만족하여 흡기온도, 냉각수온도, 연료레일온도가 일정하게 유지된 조건에서 시동이 이루어져야만 한다.If the temperature sensor in the fuel tank does not operate normally or there is no temperature sensor, the intake temperature, the coolant temperature, and the fuel rail temperature are kept constant by satisfying the parking conditions for a certain time while the vehicle is turned off. A start must be made under the conditions.
그러나, 상기와 같은 조건에서 시동이 이루어져, 해당 차량이 주행하게 되면, 요구되는 조성비를 만족하는 조건으로 진입하기 전까지는 해당 조성비를 검출하지 못하기 때문에, 목표로 하는 연료분사량 보정이 정확히 이루어지지 못하게 되어, 배기가스가 증가되는 등의 문제점이 있었다.However, if the vehicle is started under the above conditions and the vehicle is driven, the target composition ratio cannot be detected until the vehicle reaches the condition that satisfies the required composition ratio, so that the target fuel injection amount cannot be corrected accurately. There is a problem that the exhaust gas is increased.
상기와 같은 문제점을 해결하기 위해서, 본 발명은 LPG차량의 연료탱크 내에 설치된 온도센서가 정상적으로 작동되지 못하는 경우나 온도센서가 장착되지 않는 경우에, 설정된 조건에 의한 조성비 검출이 완료되기 전까지 일시적으로 조성비를 모델링하여 근사된 조성비를 산출하고, 이에 따라 분사연료량을 보정함으로써, 목표로 하는 흡입공기에 대한 분사연료의 비율로 보정할 수 있는 엘피지 연료의 조성비 모델링 방법을 제공하는데 목적이 있다.In order to solve the above problems, the present invention is a temporary composition ratio until the composition ratio detection under the set conditions is completed, when the temperature sensor installed in the fuel tank of the LPG vehicle does not operate normally or the temperature sensor is not mounted It is an object of the present invention to provide a composition ratio modeling method of the LPG fuel that can be corrected by the ratio of the injection fuel to the target intake air by calculating the approximate composition ratio by modeling, and correcting the injection fuel amount accordingly.
상기와 같은 목적을 달성하기 위해서, 본 발명에 따른 엘피지 연료의 조성비 모델링 방법은, 이그니션키 오프(Off)시의 연료레벨, 엘피지 연료 조성비, 목표 공연비와의 차이에 대한 학습값을 저장하는 단계, 이그니션키가 온(On)되면, 온도센서의 상태를 확인하여 정상이 아님을 감지하는 단계, 저장된 연료레벨과 현재 연료레벨을 비교하여 연료의 재충전 여부를 판단하는 단계, 연료가 재충전된 경우, 배출되는 산소량을 감지하여 목표 공연비와의 차이를 학습하여 상기 목표 공연비와의 차이에 대한 학습결과를 생성하는 단계, 상기 목표 공연비와의 차이에 대한 학습결과와 저장된 상기 목표 공연비와의 차이에 대한 학습값의 차이가, 설정된 제한치를 초과하는지 판단하는 단계, 상기 판단결과 제한치를 초과하는 경우, 상기 목표 공연비와의 차이에 대한 학습결과에 기초하여 조성비를 모델링하는 단계 및 상기 모델링된 조성비에 따라 분사연료량을 보정하는 단계로 이루어진 것을 특징으로 한다.In order to achieve the above object, the composition ratio modeling method of the LLP fuel in accordance with the present invention, the step of storing the learning value for the difference between the fuel level, the lpgi fuel composition ratio, the target air-fuel ratio at the time of the ignition key Off (Off), When the ignition key is turned on, detecting the abnormal state by checking the state of the temperature sensor, comparing the stored fuel level with the current fuel level, determining whether the fuel is recharged, and when the fuel is recharged, Generating a learning result of the difference between the target air-fuel ratio by sensing a difference of the target air-fuel ratio by sensing the amount of oxygen, and a learning value of the difference between the learning result of the difference from the target air-fuel ratio and the stored target air-fuel ratio Determining whether the difference is greater than the set limit value, and if the difference exceeds the limit value, And that on the basis of the learning result consisting of a step for correcting the amount of fuel injection in accordance with the steps and the modeled compositions for modeling composition characterized.
또한, 상기 온도센서의 상태를 확인하여 정상이 아님을 감지하는 단계는, 상기 온도센서가 없는지 여부를 감지하는 것을 특징으로 한다.In addition, the step of detecting the non-normal by checking the state of the temperature sensor, characterized in that it detects whether there is no temperature sensor.
그리고, 상기 연료가 재충전된 경우, 기 설정된 저온 시동 조건을 만족하지 않으면, 상기 학습하는 단계를 수행하는 것을 특징으로 한다.When the fuel is recharged, the learning step is performed when the preset low temperature start condition is not satisfied.
바람직하게는, 상기 판단결과 제한치를 초과하지 않는 경우, 상기 목표 공연비와의 차이에 대한 학습결과를, 저장된 상기 목표 공연비와의 차이에 대한 학습값에 누적저장하는 단계를 더 포함하는 것을 특징으로 한다.The method may further include accumulating and storing the learning result of the difference with the target air-fuel ratio in a learning value of the difference with the stored target air-fuel ratio when the determination result is not exceeded. .
상기와 같은 해결수단에 의해, 본 발명은 LPG차량의 연료탱크내 온도센서가 정상적으로 작동하지 않거나 온도센서가 없는 경우에도, 목표로 하는 연료분사량 보정이 정확히 이루어지도록 할 수 있는 장점이 있다.By the above solution, the present invention has the advantage that even if the temperature sensor in the fuel tank of the LPG vehicle does not operate normally or there is no temperature sensor, the target fuel injection amount correction can be made accurately.
특히, 연료가 충전될 때마다, 공급되는 연료의 조성비를 간접적으로 모델링함으로써, 긴급한 연료의 조성비 변경에 신속한 대응이 가능하도록 하는 효과가 있다.In particular, each time the fuel is filled, by indirectly modeling the composition ratio of the supplied fuel, there is an effect to enable a quick response to the urgent fuel composition ratio change.
따라서, 배출되는 배기가스에 의한 공연비를 일정하게 제어할 수 있어, 유해한 배기가스의 증가를 줄일 수 있음은 물론, LPG차량 및 엔진제어 등에 대한 신뢰 성을 향상시켜, 해당 제품의 경쟁력을 향상시키는 효과가 있다.Therefore, it is possible to control the air-fuel ratio by the exhaust gas discharged constantly, to reduce the increase of harmful exhaust gas, and to improve the reliability of LPG vehicles and engine control, etc., improving the competitiveness of the product. There is.
본 발명에 따른 엘피지 연료의 조성비 모델링 방법에 대한 예는 다양하게 적용할 수 있으며, 이하에서는 첨부된 도면을 참조하여 가장 바람직한 실시 예에 대해 설명하기로 한다.Examples of the composition ratio modeling method of the LLP fuel according to the present invention can be applied in various ways, hereinafter with reference to the accompanying drawings will be described the most preferred embodiment.
먼저, 본 발명을 설명함에 있어, 연료레일 내부의 연료압력을 측정하기 위한 압력센서, 연료레일 내부의 온도를 측정하기 위한 온도센서, 연료레일로 연료를 공급하기 위한 유량 가변형 펌프, 배기가스 공연비를 측정하기 위한 산소센서, 연료탱크 내의 연료 레벨을 측정하기 위한 연료레벨센서, 엔진상태를 알기 위한 크랭크각센서, 캠센서 및 이그니션키신호, 그리고 상기 구성들을 제어하기 위한 ECU(Electronic Control Unit) 등은 당업자의 요구에 따라 다양한 변경이 가능하므로, 특정한 것에 한정하지 않음은 당연하다.First, in describing the present invention, a pressure sensor for measuring the fuel pressure inside the fuel rail, a temperature sensor for measuring the temperature inside the fuel rail, a variable flow rate pump for supplying fuel to the fuel rail, the exhaust gas air-fuel ratio Oxygen sensor for measuring, fuel level sensor for measuring fuel level in fuel tank, crank angle sensor for knowing engine status, cam sensor and ignition key signal, and ECU (Electronic Control Unit) for controlling the above components Various modifications are possible in accordance with the needs of those skilled in the art, so it is obvious that the present invention is not limited thereto.
도 1은 본 발명에 의한 엘피지 연료의 조성비 모델링 방법의 예를 나타낸 흐름도이다.1 is a flowchart showing an example of the composition ratio modeling method of the LLP fuel according to the present invention.
먼저, 차량의 주행이 완료되고 이그니션키가 오프(Off)되면, 이그니션키가 오프되는 순간 연료레벨, 엘피지 연료 조성비와 목표 공연비와의 차이에 대한 학습값을 저장한다(S10).First, when driving of the vehicle is completed and the ignition key is turned off, the learning value for the difference between the fuel level, the fuel oil composition ratio, and the target air fuel ratio is stored at the moment when the ignition key is turned off (S10).
여기서, 학습이라 함은, 주어지는 자료를 기초로 하여 필요한 정보를 산출 및 저장하는 것으로, 목표 공연비와의 차이 학습값은 이그니션키의 오프(Off)때 마 다, 운전 중에 발생한 목표 공연비와의 차이를 기초로 하여 누적하여 산출되는 값이다.Here, learning means calculating and storing necessary information on the basis of the given data, and the difference from the target air-fuel ratio. The learning value is a value calculated by accumulating on the basis of the difference from the target air-fuel ratio generated during operation, each time the ignition key is off.
여기서, 누적 산출된 학습값은 기존 엘피지 연료 조성비가 정확히 판단되었을 때, 조성비에 대한 연료 분사 결과를 제외한 연료 시스템 계의 편차에 대한 정보로 판단한다.Here, the cumulative calculated learning value is determined as information on the deviation of the fuel system system excluding the fuel injection result with respect to the composition ratio when the existing LLP fuel composition ratio is correctly determined.
이후, 재주행을 위하여 해당 차량의 이그니션키 신호가 온(On)되면, 도 2에 나타난 바와 같이, 연료탱크의 온도센서의 정상 여부를 확인한 후(S11), 온도센서가 정상이면 연료레일의 압력 및 연료의 온도에 기초하여 연료의 조성비를 지속적으로 검출하고(S12), 이를 기초로 하여 엘피지 연료 모델 조성비에 대응하여 분사되는 연료량을 보정한다(S60).Then, when the ignition key signal of the vehicle for re-driving (On), as shown in Figure 2, after checking whether the temperature sensor of the fuel tank is normal (S11), if the temperature sensor is normal, the pressure of the fuel rail And continuously detecting the composition ratio of the fuel based on the temperature of the fuel (S12), and correcting the amount of fuel injected in correspondence with the LPG fuel model composition ratio based on this (S60).
여기서, 연료탱크의 온도센서의 정상 여부를 확인하는 단계(S11)는 온도센서가 장착되지 않은 경우를 포함하며, 온도센서가 장착되지 않은 경우는 온도센서가 정상이 아닌 경우와 동일한 판단 결과를 갖는다.Here, the step (S11) of checking whether the temperature sensor of the fuel tank is normal includes a case in which the temperature sensor is not mounted, and the case in which the temperature sensor is not mounted has the same determination result as the case in which the temperature sensor is not normal. .
만일, 본 발명의 목적에서 밝힌 바와 같이, 연료탱크의 온도센서가 정상이 아닌 경우(S11), 저장된 연료레벨(주행이 완료된 직후의 연료량)과 현재의 연료레벨(예를 들어, 연료충전이 이루어진 후의 연료량)을 비교하여 연료의 재충전 여부를 판단한다(S20).If the temperature sensor of the fuel tank is not normal (S11), as indicated in the object of the present invention, the stored fuel level (amount of fuel immediately after the driving is completed) and the current fuel level (for example, fuel filling is made). It is determined whether or not the fuel is recharged by comparing the amount (fuel later) (S20).
연료의 재충전 확인 결과, 재충전이 이루어지지 않은 경우에는 'S10' 과정에 서 저장된 연료 조성비에 대응하여 분사되는 연료량을 보정한다(S60).As a result of confirming the recharging of the fuel, when the recharging is not performed, the amount of fuel injected is corrected in response to the fuel composition ratio stored in the process 'S10' (S60).
한편, 연료가 재충전된 경우, 도 2에 나타난 바와 같이 저온시동 및 조성비 모델 조건의 만족 여부를 확인한다(S21).On the other hand, when the fuel is recharged, it is checked whether the low-temperature start and composition ratio model conditions as shown in Figure 2 (S21).
여기서, 저온시동 조건의 경계온도 및 모델 조건 등은 당업자의 요구에 따라 다양한 것으로 적용될 수 있으므로, 특정한 것에 한정하지 않음은 당연하다.Here, the boundary temperature and model conditions of the cold start condition may be applied to various ones according to the needs of those skilled in the art, and therefore it is not limited to the specific one.
그리고, 조건을 만족하면(S21), 연료레일의 압력 및 연료의 온도에 기초하여 연료의 조성비를 검출하고(S22), LPG연료 모델 조성비에 따라 분사 연료량을 보정한다(S60).When the condition is satisfied (S21), the fuel composition ratio is detected based on the pressure of the fuel rail and the temperature of the fuel (S22), and the injection fuel amount is corrected according to the LPG fuel model composition ratio (S60).
만약, 조건을 만족하지 않으면(S21), 산소센서에 의해 배출되는 산소량을 감지하여 저장된 학습 영역에서 목표 공연비와의 차이를 학습한다(S30).If the condition is not satisfied (S21), the amount of oxygen discharged by the oxygen sensor is sensed to learn a difference from the target air-fuel ratio in the stored learning area (S30).
그리고, 목표 공연비와의 차이에 대한 학습결과와 저장된 학습결과의 차이가, 설정된 제한치를 초과하는지 판단한다(S40).Then, it is determined whether the difference between the learning result and the stored learning result with respect to the difference with the target air-fuel ratio exceeds the set limit (S40).
여기서, 제한치는 목표 공연비와의 차이에 대한 학습결과와 저장된 학습결과의 최대허용값으로, 해당 차량의 구성 및 성능과 더불어 당업자의 요구에 따라 다양하게 적용될 수 있음은 당연하다.Here, the limit value is the maximum allowable value of the learning result and the stored learning result for the difference between the target air-fuel ratio, and it is natural that the configuration and performance of the vehicle may be variously applied according to the needs of those skilled in the art.
판단결과, 제한치 이하인 경우(S40), 목표 공연비와의 차이에 대한 학습결과를, 저장된 학습결과에 누적저장하고(S41), 엘피지 연료 모델 조성비에 따라 분사 연료량을 보정한다(S60).If the determination result is less than the limit value (S40), the learning result of the difference with the target air-fuel ratio is accumulated and stored in the stored learning result (S41), and the amount of injected fuel is corrected according to the LLP fuel model composition ratio (S60).
반면, 판단결과 제한치 초과한 경우(S40), 저장된 목표 공연비와의 차이 학습결과와, 목표 공연비와의 차이에 대한 학습결과에 기초하여 조성비를 모델링한 후(S50), 모델링된 조성비에 따라 분사연료량을 보정한다(S60).On the other hand, when the determination result exceeds the limit value (S40), after modeling the composition ratio based on the difference learning result and the learning result of the difference between the target air-fuel ratio (S50), the amount of injection fuel according to the modeled composition ratio Correct (S60).
따라서, LPG차량의 연료탱크내 온도센서가 정상적으로 작동하지 않는 경우나 온도센서가 없는 경우에도, 연료가 충전될 때마다 목표로 하는 연료분사량의 보정이 정확히 이루어지도록, 공급되는 연료의 조성비를 간접적으로 모델링함으로써, 긴급한 연료의 조성비 변경에 신속한 대응이 가능함은 물론, 배출되는 배기가스에 의한 공연비를 일정하게 제어할 수 있어, 유해한 배기가스의 증가를 줄일 수 있는 것이다.Therefore, even if the temperature sensor in the fuel tank of the LPG vehicle does not operate normally or there is no temperature sensor, the composition ratio of the supplied fuel is indirectly adjusted so that the target fuel injection amount is corrected every time the fuel is charged. By modeling, it is possible not only to respond quickly to the urgent fuel composition ratio change, but also to control the air-fuel ratio by the exhaust gas discharged constantly, and to reduce the increase of harmful exhaust gas.
이상에서 본 발명에 의한 엘피지 연료의 조성비 모델링 방법에 대하여 설명하였다. 이러한 본 발명의 기술적 구성은 본 발명이 속하는 기술분야의 당업자가 본 발명의 그 기술적 사상이나 필수적 특징을 변경하지 않고서 다른 구체적인 형태로 실시될 수 있다는 것을 이해할 수 있을 것이다.The composition ratio modeling method of the LLP fuel according to the present invention has been described above. It will be understood by those skilled in the art that the technical features of the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.
그러므로 이상에서 기술한 실시 예들은 모든 면에서 예시적인 것이며, 한정적인 것이 아닌 것으로서 이해되어야 하고, 본 발명의 범위는 전술한 상세한 설명보다는 후술하는 특허청구범위에 의하여 나타내어지며, 특허청구범위의 의미 및 범위 그리고 그 등가개념으로부터 도출되는 모든 변경 또는 변형된 형태가 본 발명의 범위에 포함되는 것으로 해석되어야 한다.Therefore, the above-described embodiments are to be understood in all respects as illustrative and not restrictive, and the scope of the present invention is indicated by the appended claims rather than the foregoing description, and the meanings of the claims and All changes or modifications derived from the scope and the equivalent concept should be construed as being included in the scope of the present invention.
도 1은 본 발명에 의한 엘피지 연료의 조성비 모델링 방법에 대한 동작 흐름을 도시한 흐름도이다.1 is a flowchart illustrating an operation flow of a method for modeling a composition ratio of LLP fuel according to the present invention.
도 2는 도 1에 대한 구체적인 동작 흐름을 나타낸 순서도이다.2 is a flowchart illustrating a specific operation flow of FIG. 1.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020090114947A KR101188980B1 (en) | 2009-11-26 | 2009-11-26 | Method for modeling of combination ratio of LPG fuel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020090114947A KR101188980B1 (en) | 2009-11-26 | 2009-11-26 | Method for modeling of combination ratio of LPG fuel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20110058234A KR20110058234A (en) | 2011-06-01 |
| KR101188980B1 true KR101188980B1 (en) | 2012-10-08 |
Family
ID=44393757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020090114947A KR101188980B1 (en) | 2009-11-26 | 2009-11-26 | Method for modeling of combination ratio of LPG fuel |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR101188980B1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003090237A (en) | 2001-09-17 | 2003-03-28 | Toyota Motor Corp | Fuel supplier for internal combustion engine |
| KR100719755B1 (en) | 2005-12-19 | 2007-05-17 | 지멘스 오토모티브 주식회사 | Method for driving engine using mixing fuel |
| JP2009250206A (en) | 2008-04-10 | 2009-10-29 | Aisan Ind Co Ltd | Liquefied gas fuel supply device |
-
2009
- 2009-11-26 KR KR1020090114947A patent/KR101188980B1/en active IP Right Grant
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003090237A (en) | 2001-09-17 | 2003-03-28 | Toyota Motor Corp | Fuel supplier for internal combustion engine |
| KR100719755B1 (en) | 2005-12-19 | 2007-05-17 | 지멘스 오토모티브 주식회사 | Method for driving engine using mixing fuel |
| JP2009250206A (en) | 2008-04-10 | 2009-10-29 | Aisan Ind Co Ltd | Liquefied gas fuel supply device |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20110058234A (en) | 2011-06-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2714215C2 (en) | Method of vehicle fuelling | |
| US8108094B2 (en) | Diagnosis device for energy transfer in vehicle | |
| CN103306831B (en) | Estimate the method and system of fuel element | |
| US8751135B2 (en) | Method to diagnose a fault in a fuel injection system of an internal combustion engine | |
| US9436916B2 (en) | Method for determining a correction characteristic curve | |
| US9051893B2 (en) | Method for detecting a malfunction in an electronically regulated fuel injection system of an internal combustion engine | |
| CN105649805A (en) | Identification of fuel system degradation | |
| US8725391B2 (en) | Method for identifying an error function and in particular a drift of a rail pressure sensor in a common rail injection system | |
| US20130080032A1 (en) | Pressure sensor diagnosing method and common rail fuel injection control apparatus | |
| US20130118456A1 (en) | Optimization of tank venting of a fuel tank | |
| JP6359122B2 (en) | Method and apparatus for calibrating post-injection of an internal combustion engine | |
| CN106401765B (en) | Method for determining the charge of a reservoir for hydrocarbons | |
| KR101188980B1 (en) | Method for modeling of combination ratio of LPG fuel | |
| US6829555B2 (en) | Method and arrangement for monitoring the emissions during operation of a supply vessel for supplying a volatile medium including a fuel supply tank of a motor vehicle | |
| KR101755933B1 (en) | A method for deterioration of pressure sensor for common rail and an apparatus the same | |
| EP1555413B1 (en) | Fuel injection system of internal combustion engine | |
| KR101068610B1 (en) | Method for aging judgment of flexible fuel system | |
| JP6010380B2 (en) | Fuel consumption calculation system | |
| JP5862511B2 (en) | Vehicle learning data reuse determination device | |
| US8851052B2 (en) | Method and control device for operating an internal combustion engine | |
| US20220082058A1 (en) | Method and evaluation unit for detecting a malfunction of a fuel system of an internal-combustion engine | |
| CN113077564A (en) | Vehicle early warning method and device | |
| JP2010038142A (en) | Injection amount control device for internal combustion engine | |
| JP6511787B2 (en) | Control device for hybrid vehicle | |
| JP2006316635A (en) | Fuel injection control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E701 | Decision to grant or registration of patent right | ||
| GRNT | Written decision to grant | ||
| FPAY | Annual fee payment |
Payment date: 20150629 Year of fee payment: 6 |
|
| FPAY | Annual fee payment |
Payment date: 20180702 Year of fee payment: 9 |