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EFI기관에서 초음파에너지 부가 연료의 무화특성에 관한 연구(Ⅱ)- 연료의 분자 구조 및 물리적 특성 분석-
윤면근(M.K. Yoon),안순혁(S.H. An),최정원(J.W.Choi),류정인(J.I. Ryu) 한국자동차공학회 1995 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1995 No.6_1
This experimental study was performed by the reflection object and the variation of injection pressure with the conventional injector and the ultrasonic fuel adding injector in order to improve the characteristics of the fuel injector for EFI type.<br/> The cause and effect of the characteristic improvement of the ultrasonic adding fuel was found out by the chemical structure analysis(NMR, IR) and the physical test(viscosity, distillation).<br/> The results are obtained as follows;<br/> 1. The SMD by the conventional injector and the ultrasonic fuel adding injector are much smaller as injection pressure increase. Also, the SMD and distribution of the particle by the ultrasonic fuel adding injector is better than those by the conventional injector.<br/> 2. The chemical property of fuel was changed by ultrasonic energy. Bl was increased, percent of aromatics volume was reduced by ultrasonic energy.<br/> 3. The physical characteristics(viscosity, distillation) of fuel were improved by ultrasonic energy; Viscosity was decreased, ultrasonic energy added fuel was improved cold starting & acceleration properties.<br/>
EFI 기관에서 초음파에너지 부가 연료의 무화특성에 관한 연구-연료의 분자 구조 분석
윤면근(M.K.Yoon),최관호(K.H.Choi),최장원(J.W.Choi),류정인(Jeong-In Ryu) 한국자동차공학회 1994 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1994 No.11_1
This experimental study was performed by the reflection object and the variation of injection pressure with the conventional injector and the ultrasonic fuel adding injector in order to improve the characteristics of the fuel injector for EFI type<br/> The cause and effect of the characteristic improvement of the ultrasonic adding fuel was fo und out by the chamical structure analysis.<br/> The results are obtained as follows;<br/> 1. The SMD by the conventional injector and the ultrasonic fuel adding injector are much s-maller as injection pressure increase. Also, the SMD and distribution of the particle by the ultrasonic fuel adding injector is better than those by the conventional injector.<br/> 2. The chamical property of fuel was changed by ultrasonic energy.<br/>
[가솔린엔진] 초음파 연료 공급장치가 가솔린 엔진의 연비 및 배기가스에 미치는 영향
윤면근(M.K. Yoon),방효민(H.M. Bang),김진구(J.G. Kim),이홍섭(H.S. Lee),류정인(J.I. Ryu) 한국자동차공학회 1999 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This study investigated engine performance and exhaust gas by comparing ultrasonic energy added gasoline fuel used ultrasonic energy fuel feeding system with the conventional gasoline fuel<br/> This results are obtained as follow<br/> 1. In engine performance, it was found that specific fuel consumption, brake power, and brake thermal efficiency was improved more 3.5%, 4.73%, 3.63% respectively in case of ultrasonic energy added gasoline fuel than in case of conventional gasoline fuel.<br/> 2. We knew that ultrasonic energy decreases HC and CO, decreases NOx at low load but increases at high load
초음파연료공급장치를 이용한 MPI 인젝터의 성능에 관한 연구
윤면근(M.K.Yoon),안순혁(S.H.Ahn),류정인(J.I Ryu) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.6_2
This experiment was undertaken to investigate spray characteristics of the conventional injection system and the ultrasonic energy added injection system.<br/> Sauter mean diameter was measured under the variation of injection pressure and the spray distance. To measure the droplet size, we used the Malvern system 2600C. The spray angle and mass distribution were analyzed to the CCD camera and the patternater.<br/> After experiment, it was found that the ultrasonic energy added injection system had smaller Sauter mean diameter of droplet, wider mass distribution and wider spray angle than the conventional injection system had.<br/>
W/O type 유화연료제조 및 연속분사노즐의 분무특성에 관한 연구
윤면근(M.K.Yoon),김용국(Y.K.Kim),이승진(S.J.Lee),류정인(J.I.Ryu) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.5_1
To investigate spray of emulsified fuel of W/O type, we mixed water with diesel oil by using ultrasonic energy adding system. We measured the SMD of sprayed droplet to find atomization characteristics of emulsified fuel by using the Malvern 2600D system. The main results are as follows; 1) The more water content increased, the more SMD increased. 2) The more measuring distance increased between one hole nozzle tip and analyser beam, the more SMD increased. These conditions are the amount of water content, 0~30% by 5% in emulsified fuel, and the distance, 10 ~100mm by 10mm. between nozzle tip and analyser beam.<br/>
6 hole 가솔린 인젝터의 분무특성에 관한 실험적 연구
윤면근(M.K Yoon),이재성(J.S Lee),류정인(J.I Ryu) 한국자동차공학회 2001 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2001 No.5_1
This experimental study was to investigate the characteristics of spray for an intermittent injection using 6 hole gasoline injector. 2-D patternator and Image processing system was utilized for the spray mass distribution and the visualization of spray. And the equivalent spray cone angle was estimated using the result of mass distribution<br/> Also, the measuring droplet size was carried out by using the Malvern system.<br/> Fuel injection duration was fixed with 2.5ms and The important experimental parameters were the injection pressure and the spray axis distance. The injection pressure was varied from 2kg/㎠ to 6kg/㎠ increments of 1kg/㎠, and the spray axis distance was varied from 60mm to 120 mm by increments of 2Omm.<br/>