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DME-LPG HCCI 엔진에서 LPG 조성과 분사량이 연소에 미치는 영향
오창훈(Changhoon Oh),장진영(Jinyoung Jang),배충식(Choongsik Bae) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
The effect of the composition(propane(C₃H?), butane(C₄H?)) and injection quantity of liquefied petroleum gas (LPG) was investigated in a di-methyl ether (DME)-LPG dual-fuel homogeneous charge compression ignition (HCCI) engine. The composition of LPG and injection quantity affects DME-LPG dual fuel HCCI combustion because LPG suppresses low temperature reaction of DME which results retardation of high temperature reaction. It was found that ignition delay was prolonged as injection quantity of LPG increased. Ignition delay was more prolonged when propane was used due to better anti-knock property compared to butane. Thus, high load operating regime was extended by addition of LPG, and further expanded when propane was used. However, at the same condition, amount of heat release rate per heating value of injected fuel was decreased because of suppression of low temperature reaction of DME, which affects heat release amount of entire combustion reaction. In terms of emissions, carbon monoxide (CO) and nitrogen oxide (NOx) emissions were strongly dependent on combustion temperature while hydrocarbon(HC) emission was proportional to amount of LPG injected compared to injected DME. In case that injected quantity of LPG was equal, there were disadvantages of HC and NOx emissions and advantage in CO emission when propane was used.
한덕수,장영민,전봉준,김성준 강원대학교 산업기술연구소 2006 産業技術硏究 Vol.26 No.B
As an automobile fuel, LPG has many environmental advantages compared to gasoline or diesel. However, current LPG engine which is provided with LPG fuel as gas form has lower power and worse fuel efficiency than gasoline engine. These problems of low power and bad fuel efficiency come from lower volumetric efficiency. Also there is a new rising problem of high failure ratio in an engine emission test. Although there are many factors which affect engine performance of exhaust gas emission, one believes that the fact that ECM of gasoline engine is used for LPG engine when retrofitting gasoline engine to LPG engine is one of the main problems, which lower engine power and emit more noxious gas due to wrong ignition timing. To solve these problems, one studied the effects ignition timing on the exhaust gas to find out the optimum condition of ignition timing. The experimental results show that noxious exhaust gas is reduced and engine power is increased if the optimum control of ignition timing is applied in accordance to the revolution speed of engine.
한덕수,장영민,전봉준,김성준 강원대학교 산업기술연구소 2006 産業技術硏究 Vol.26 No.A
As an automobile fuel, LPG has many environmental advantages compared to gasoline or diesel. However, current LPG engine which is provided with LPG fuel as gas form has lower power and worse fuel efficiency than gasoline engine. These problems of low power and bad fuel efficiency come from lower volumetric efficiency. Also there is a new rising problem of high failure ratio in an engine emission test. Although there are many factors which affect engine performance of exhaust gas emission, one believes that the fact that ECM of gasoline engine is used for LPG engine when retrofitting gasoline engine to LPG engine is one of the main problems, which lower engine power and emit more noxious gas due to wrong ignition timing. To solve these problems, one studied the effects of ignition timing on the exhaust gas to find out the optimum condition of ignition timing. The experimental results show that noxious exhaust gas is reduced and engine power is increased if the optimum control of ignition timing is applied in accordance to the revolution speed of engine.
외장형 연료펌프를 사용한 LPLi 연료공급시스템에서의 연료상태량 변화 예측
김재형(Jaehyung Kim),윤여빈(Yubin Yoon),송춘섭(Chunsub Song),박영준(Youngjoon Park),이성욱(Seangwock Lee),조용석(Yongseok Cho) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
The LPG(Liquefied Petroleum Gas) fuel attracts attention as a clean alternative fuel. In order to further reduce the exhaust emission and improve performance in LPG engines, the LPLi(Liquid Phase LPG Injection) system is used. In LPLi system, the fuel pump performance is important for keeping the LPG over it"s saturated vapor pressure. An external fuel pump is needed to improve the durability and the ease of maintenance for LPG engines. This paper predicted the variation of fuel properties on the LPLi system with an external fuel pump. From each component"s thermodynamic model, an 1-D simulation is developed for LPLi systerm with an external fuel pump. Then the 1-D simulation data analyzed and compared with the rig-test and chassis dynamometer test. The 1-D simulation, the rig-test and the chassis dynamometer test produced similar results.
이태연(Taeyeon Lee),심한섭(Hansub Sim) 한국공작기계학회 1999 한국공작기계학회지 Vol.8 No.5
Since LPG has a higher octane number and a lower maximum combustion temperature than gasoline, it is getting more popular for reducing emissions from the vehicle. This paper, when an LPG engine works in the range of idle, analyzed the operating range preciously and provides reducing method of emissions for the LPG engine. An electronic control unit(ECU) for the LPG engine using a feedback mixer is presented. The ECU is built by using a microcontroller MC68HC05. A PI-controller is implemented in the ECU in order to handle Air-Fuel ratio control. The experimental results exhibit that the required engine performance are satisfied at idle.
과급 1.6L LPG 직접분사식(LPDI) 엔진의 입자상물질 배출 특성과 분사시기 변화에 따른 배출가스 특성 및 엔진 거동에 관한 연구
진동영(Dong Young Jin),장원욱(Wonwook Jang),최관희(Kwanhee Choi),고아현(Ahyun Ko),박심수(Simsoo Park),송진오(Song Jinoh),육철수(Yook Chulsoo) 한국자동차공학회 2013 한국자동차공학회 부문종합 학술대회 Vol.2013 No.5
This study investigates characteristic of THC and NOx emission and engine behavior with the change of injection timing in turbo-charged direct injection engine fueled with LPG (T-LPDI). THC emission varies depends on engine speed and load, however injection timing has no effect to THC emission. LPG has fine characterisric of atomization, so combustion efficiency is increased. Injection timing has effect to NOx emission as premixed rate and intake air mass is changed. As a result bTDC 310˚CA is compromised injection timing. Particulate number varies depends on engine speed and load because of combustion period and intensity of air flow.