公开(公告)号：KR1020040107684A

公开(公告)日：2004-12-23

申请号：KR1020030036722

申请日：2003-06-09

Applicant: 현대자동차주식회사

Inventor： 김덕렬

IPC: B60K15/077

Abstract: PURPOSE: A fuel-return noise prevention device of a bombe of an LPI(Liquefied Petroleum Gas Injection) vehicle is provided to prevent noise caused by bubble floatation or fluid drop by separating over-supplied fuel returned into the bombe into liquid and gaseous fuel, diffusing the gaseous fuel into a space, and flowing the liquid fuel into pre-filled liquid fuel. CONSTITUTION: A fuel-return noise prevention device of a bombe(1) of an LPI vehicle is composed of a return pipe(2) inserted and mounted in the bombe; a box-shaped reservoir(7) having an upside connected to the return pipe and a plurality of vent holes(7a) on the upside; and a discharge pipe(8) of which an upper end is coupled to the lower side of the reservoir and a lower end is extended adjacently to the bottom surface of the bombe. The lower end of the discharge pipe is positioned in the depth that the fuel is filled in 10% of the fuel tank.

Abstract translation: 目的：提供LPI（液化石油气注射）车辆的燃料回收噪声防止装置，以通过将返回到炸弹中的过量供应的燃料分成液体和气体燃料来防止由气泡漂浮或液体流失引起的噪声， 将气体燃料扩散到空间中，并将液体燃料流入预填充的液体燃料中。 构成：LPI车辆的轰炸机（1）的燃油返回防噪装置由插入并安装在炸弹中的回流管（2）组成; 具有连接到所述返回管的上侧的箱形容器（7）和在所述上侧上的多个通气孔（7a）; 和排出管（8），其上端与贮存器的下侧相连，下端与炸弹的底面相邻延伸。 排放管的下端定位在燃料填充在燃料箱的10％的深度。

公开(公告)号：KR100952009B1

公开(公告)日：2010-04-08

申请号：KR1020080034281

申请日：2008-04-14

Applicant: 현대자동차주식회사

Inventor： 김덕렬

IPC: F02M21/02 ,  F02M37/04 ,  B60W20/00

CPC classification number: Y02T10/32

Abstract: 본 발명은 엘피아이(LPI) 하이브리드 차량의 연료펌프 제어방법에 관한 것으로, 모터 구동상태에서도 연료펌프가 작동되어 연료의 공급이 이루어지고, 또한 연료압력이 목표압력범위(LPG 연료가 항상 액상을 유지함과 더불어 연료펌프의 작동 반복 시간이 적절한 간격을 유지하도록 설정됨) 내에서 유지되도록 제어되는 것을 특징으로 한다.
따라서, 모터 구동상태에서 엔진 구동상태로 전환 시 충분한 농도의 연료가 안정적으로 공급됨으로써 안정된 시동 및 구동상태 유지가 가능한 효과가 있다.
엘피아이 엔진, 엘피아이 하이브리드 차량, 모드 전환, 연료공급

公开(公告)号：KR1020100028368A

公开(公告)日：2010-03-12

申请号：KR1020080087375

申请日：2008-09-04

Applicant: 현대자동차주식회사

Inventor： 김덕렬

IPC: F02D41/04 ,  F02D41/30

CPC classification number: F02D41/0045 ,  F02D41/0025 ,  F02D41/30 ,  Y02T10/32 ,  Y02T10/44

Abstract: PURPOSE: A method for calculating ethanol content of fuel in an engine is provided to calculate the ethanol content and control the fuel injection amount only when fuel amount is changed, thereby reducing the load of the ECU. CONSTITUTION: A method for calculating ethanol content of fuel in an engine comprises a step of calculating the ethanol content of fuel from a signal of an ethanol sensor when ignition is on(S305,S307), and a step of controlling the fuel injection amount of the engine according to the calculated ethanol content(S309). The fuel level sensor measures the fuel amount in a fuel tank during the operation of the engine.

Abstract translation: 目的：提供一种计算发动机燃料乙醇含量的方法，以计算乙醇含量，仅在燃料量变化时控制燃料喷射量，从而降低ECU的负荷。 发明内容一种用于计算发动机中的燃料乙醇含量的方法，包括：当点火开启时从乙醇传感器的信号计算燃料的乙醇含量的步骤（S305，S307），以及控制燃料喷射量的步骤 发动机根据计算出的乙醇含量（S309）。 燃料液位传感器在发动机运转期间测量燃料箱中的燃料量。

公开(公告)号：KR100736999B1

公开(公告)日：2007-07-09

申请号：KR1020050080175

申请日：2005-08-30

Applicant: 현대자동차주식회사

Inventor： 김덕렬

IPC: F02D19/02 ,  F02D41/22 ,  F02M61/04

CPC classification number: F02D19/021 ,  F02D19/025 ,  F02D41/221 ,  F02M21/0212 ,  F02M21/0254 ,  Y02T10/32 ,  Y02T10/40

Abstract: 본 발명은 컷솔레노이드를 구비한 인젝터를 제어하는 제어회로와 상기 컷솔레노이드를 제어하는 제어방법 및 상기 컷솔레노이드의 고장여부를 판단하는 고장진단방법을 제공함으로써, 엘피아이 엔진의 정지시에 인젝터로부터 연료가 대기중으로 누출되는 것을 효과적으로 차단할 수 있도록 하여, 대기오염을 시키지 않고, 각종 관련법규의 내용을 충족시킬 수 있도록 한다.

公开(公告)号：KR1020070028668A

公开(公告)日：2007-03-13

申请号：KR1020050080177

申请日：2005-08-30

Applicant: 현대자동차주식회사

Inventor： 김덕렬

IPC: F02M21/02 ,  F02D45/00

CPC classification number: F02B43/12 ,  F02D19/024 ,  F02D19/025 ,  F02D19/027 ,  F02M21/0212 ,  F02M21/0242 ,  F02M21/0245 ,  F02M21/0254 ,  F02M21/026 ,  F02M51/061 ,  Y02T10/32

Abstract: An LPI(Liquefied Petroleum gas Injection) engine system is provided to prevent LPG from leaking through an intake system of an engine through an injector during ignition off, by opening/closing the LPG injection path in interlock with the starting of the engine. An LPI engine system comprises an injector(3) arranged in an intake system of an engine(1) so as to inject LPG; a fuel bombe(5) for storing LPG to be supplied to the injector; a supply line(7) and a return line(9) for interconnecting the injector and the fuel bombe and supplying and returning LPG; an engine control unit(11) for controlling the injection timing and injection amount of LPG in accordance with the travel status; and an LPI control unit(13) for detecting the variation of temperature and pressure of fuel in the fuel supply and return systems ranging from the fuel bombe to the injector. The engine control unit receives physical values varying during the operation of the engine from an intake air temperature sensor(101), an intake air flow sensor(102), a throttle position sensor(103), a crank position sensor(104), a coolant temperature sensor(105), an oxygen sensor(106), and a knock sensor(107).

Abstract translation: 提供LPI（液化石油气注射）发动机系统，通过与发动机起动联动地打开/关闭LPG喷射路径来防止LPG在点火期间通过喷射器从发动机的进气系统泄漏。 LPI发动机系统包括设置在发动机（1）的进气系统中以便喷射LPG的喷射器（3） 用于存储要供给到所述喷射器的LPG的燃料棒（5） 用于将喷射器和燃料轰炸机互连并供应和返回LPG的供应管线（7）和返回管线（9） 发动机控制单元（11），用于根据行驶状态控制液化石油气的喷射定时和喷射量; 以及LPI控制单元（13），用于检测燃料供给和返回系统中从燃料弹射器到喷射器的温度和压力的变化。 发动机控制单元接收从进气温度传感器（101），进气流量传感器（102），节气门位置传感器（103），曲柄位置传感器（104），发动机控制单元 冷却剂温度传感器（105），氧传感器（106）和爆震传感器（107）。

公开(公告)号：KR1020070027950A

公开(公告)日：2007-03-12

申请号：KR1020050079938

申请日：2005-08-30

Applicant: 현대자동차주식회사

Inventor： 김덕렬

IPC: F02M21/02 ,  F02D41/22

CPC classification number: Y02T10/32 ,  F02D41/22 ,  F02D2041/225 ,  F02M21/0236 ,  F02M21/0293

Abstract: A fuel system control method of an LPI engine vehicle is provided to turn off an engine by permitting an engine management system ECU to sense the deployment of an air bag and stop the operation of a fuel pump and an injector and shut off first and second cutoff solenoid valves upon occurrence of vehicle crash. A fuel system control method of an LPI engine vehicle comprises a step of opening a first cutoff solenoid valve and a second cutoff solenoid valve, operating a fuel pump, and judging whether fuel leakage has occurred prior to starting of an engine by monitoring the internal pressure of a fuel supply line; a step of turning off the fuel pump and shutting first and second cutoff solenoid valves, if it is judged that fuel leakage has occurred prior to starting of the engine; a step of operating an injector so that a normal fuel supply and injection operation is performed and judging whether fuel leakage has occurred after starting of the engine by monitoring the internal pressure of the fuel supply line, if it is judged in the previous step that no fuel leakage has occurred and engine has started; and a step of turning off the fuel pump and the injector and shutting first and second cutoff solenoid valves if it is judged that fuel leakage has occurred after starting of the engine.

Abstract translation: 提供一种LPI发动机车辆的燃料系统控制方法，通过允许发动机管理系统ECU感测气囊的展开并停止燃料泵和喷射器的操作并关闭第一和第二截止来关闭发动机 发生车辆碰撞时的电磁阀。 LPI发动机车辆的燃料系统控制方法包括打开第一截止电磁阀和第二截止电磁阀的步骤，操作燃料泵，以及通过监测内部压力来判断发动机起动之前是否已经发生燃料泄漏 燃料供应线; 如果在发动机起动之前判断出已经发生燃料泄漏，则关闭燃料泵并关闭第一和第二截止电磁阀的步骤; 操作喷射器以使得正常的燃料供给和喷射操作被执行的步骤，并且通过监视燃料供应管线的内部压力来判断发动机起动之后是否已经发生燃料泄漏的步骤，如果在上一步骤中判断为没有 发生燃油泄漏，发动机已经启动; 以及如果在发动机起动之后判断出已经发生燃料泄漏，则关闭燃料泵和喷射器并关闭第一和第二截止电磁阀的步骤。

公开(公告)号：KR100579968B1

公开(公告)日：2006-05-12

申请号：KR1020030051261

申请日：2003-07-25

Applicant: 현대자동차주식회사

Inventor： 김덕렬

IPC: F02M37/00

CPC classification number: Y02T10/123 ,  Y02T10/32

Abstract: 본 발명은 LPI 차량용 리턴리스 연료시스템에 관한 것으로서, 분사되지 않은 연료가 압력조정기를 통해 연료탱크로 리턴되도록 되어 있는 기존 LPI 차량용 연료시스템의 문제점을 해결하기 위하여, 연료 리턴을 위한 구성요소를 삭제하는 대신 시동 후 연료라인의 맥동 감쇄를 위한 댐퍼와 시동 오프 후 온도상승에 따른 연료압 상승을 방지하는 리저버 탱크 및 솔레노이드를 설치하여 구성한 LPI 차량용 리턴리스 연료시스템에 관한 것이다.
이러한 본 발명의 연료시스템에서는 엔진룸쪽 연료가 연료탱크로 리턴되지 않기 때문에 연료탱크 내 온도 및 압력 상승을 막을 수 있고, 이에 엔진룸쪽 연료라인에서의 압력 상승을 방지할 수 있게 된다. 또한, 연료압 상승에 따른 연료라인의 누설을 줄일 수 있고, 연료분사제어가 용이해지며, 배기가스를 줄일 수 있게 된다. 아울러, 연료가 연료탱크로 리턴되지 않기 때문에 연료탱크 내 소음이 없고, 연료탱크 내 연료가 안정화가 될 수 있다는 장점이 있다.
LPI, 리턴리스, 연료시스템, 댐퍼, 리저버 탱크, 솔레노이드 밸브, 맥동

公开(公告)号：KR1020050092810A

公开(公告)日：2005-09-23

申请号：KR1020040017902

申请日：2004-03-17

Applicant: 현대자동차주식회사

Inventor： 김덕렬

IPC: F02D19/02

CPC classification number: Y02T10/32 ,  F02D19/025 ,  F02M21/0245

Abstract: 본 발명은 LPI 엔진의 소음저감 및 내구성 향상용 연료시스템에 관한 것으로서, LPG스위치의 위치를, 연료펌프 릴레이를 작동시키기 위한 ECU 제어라인에 직접 적용하여 비상시 운전자에 의한 LPG스위치의 전원차단과 동시에 ECU에 관계없이 연료펌프의 작동을 순간적으로 멈추도록 하여 과부하에 따른 소음의 발생을 억제하는 동시에 내구성의 저하를 개선하며, 상기와 같이 전원차단에 따른 연료펌프의 미작동 또는 배선의 단선인 경우, ECU가 자기진단하여 연료펌프 릴레이 고장코드로 저장하고 이를 통해 연료펌프의 고장진단을 저지함에 따라 클러스터의 연료펌프 경고등이 점등되지 않도록 하여 운전자가 연료펌프의 고장으로 오인할 수 없도록 하는 한편, LPG스위치의 순간적인 전원차단에 따른 과전류 및 역기전력은 연료펌프 릴레이의 내부저항에 의 해 소모되도록 하여 별도의 다이오드 사용을 억제할 수 있는 LPI 엔진의 소음저감 및 내구성 향상용 연료시스템에 관한 것이다.

公开(公告)号：KR1020040102890A

公开(公告)日：2004-12-08

申请号：KR1020030034721

申请日：2003-05-30

Applicant: 현대자동차주식회사

Inventor： 김덕렬

IPC: F02D41/06

CPC classification number: F02D41/062 ,  F02M21/0212 ,  F02M21/0221 ,  F02M21/0239 ,  F02M21/0245 ,  F02M21/0248 ,  Y02T10/32

Abstract: PURPOSE: An improving device of an ignition performance in an LPI(Liquefied Petroleum Injection) vehicle and a method thereof are provided to prevent the fuel rarefaction by raising the fuel pressure and preventing the gasification of fuel. CONSTITUTION: A fuel tank(5) embeds a fuel pump in a fuel system to supply fuel to an injector(9) in a combustion chamber of an engine(2) to be connected with an intake system(1). A supply line(6) supplies the pumped fuel to the combustion chamber by connecting the fuel tank with the injector. A return line(7) returns the remaining fuel from the injector to the fuel tank after stopping the engine. A regulator(8) controls the fuel pressure at the supply or the returning of the fuel through an ECU(Electronic Control Unit)(4) at on/off of an ignition switch(3) by installing in the lines(6,7). A solenoid valve(10) raises the fuel pressure on the lines by installing in the return line and isolating the returning passage at the fuel supply through the ECU. Thereby, the reduction of the ignition performance by the fuel rarefaction is prevented by preventing the gasification of remaining fuel.

Abstract translation: 目的：提供LPI（液化石油气注射）车辆的点火性能的改进装置及其方法，以通过提高燃料压力并防止燃料气化来防止燃料稀释。 构成：燃料箱（5）将燃料泵嵌入燃料系统中以将燃料供给到与进气系统（1）连接的发动机（2）的燃烧室中的喷射器（9）。 供应管线（6）通过将燃料箱与喷射器连接来将泵送的燃料供应到燃烧室。 停止发动机后，返回管线（7）将剩余的燃料从注射器返回到燃料箱。 调节器（8）通过安装在管线（6,7）中来控制通过ECU（电子控制单元）（4）在点火开关（3）的开/关处供应或返回燃料时的燃料压力， 。 电磁阀（10）通过安装在返回管线中而使燃料供给管路上的燃料压力升高，并通过ECU隔离燃料供给口的返回通路。 因此，通过防止残留燃料的气化来防止燃料稀释引起的点火性能的降低。

公开(公告)号：KR1020040045742A

公开(公告)日：2004-06-02

申请号：KR1020020073596

申请日：2002-11-25

Applicant: 현대자동차주식회사

Inventor： 김덕렬

IPC: F02D41/14

CPC classification number: F02D41/14 ,  F02D13/0203

Abstract: PURPOSE: A control method of a variable intake system for reducing emission is provided to improve the performance by reducing emission at the initial stage, and to accelerate easily by improving the performance of the engine. CONSTITUTION: A solenoid valve at a manifold valve is turned on(110), and a timer is operated by comparing time with the reference time(120). The solenoid valve at the manifold valve is off(130) if measured time is over 20 seconds. Rpm of the engine is compared with the first reference value of 3200 rpm(140). A solenoid valve at an intake valve is on if rpm of the engine is over 3200 rpm(150). Rpm of the engine is compared with the first reference rpm(160). Rpm of the engine is compared with the second reference value of 5100 rpm(170), and the solenoid valve at the manifold valve is turned on(180).

Abstract translation: 目的：提供一种用于减少排放的可变进气系统的控制方法，以通过减少初始阶段的排放来提高性能，并通过提高发动机的性能来轻松加速。 构成：歧管阀门上的电磁阀打开（110），并通过将时间与参考时间（120）进行比较来操作定时器。 如果测量时间超过20秒，歧管阀门上的电磁阀关闭（130）。 将发动机的Rpm与3200rpm的第一参考值（140）进行比较。 如果发动机的转速超过3200rpm（150），则进气门处的电磁阀打开。 将发动机的Rpm与第一参考转速（160）进行比较。 将发动机的Rpm与5100rpm（170）的第二参考值进行比较，并且歧管阀处的电磁阀接通（180）。