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엔진룸에서 복사되는 전자파와 스파크 플러그의 관계에 대한 실험적 연구
문진성(Jinsung Moon),김진겸(Jingyeom Kim),조시기(Shigie Jho),이신희(Shinhee Lee),김인석(Inseok Kim),이명숙(Myoungsook Lee),최광제(Gwangje Choe) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This paper presents the experimental data on the strength of the radiated electro-magnetic wave in the engine room of automobile with spark ignition system. Measured frequency range is from 110㎒ to 610㎒. We measured the radiated power of the frequency spectrum for above mentioned frequency band. The results show that each manufacturer's spark plug gives the different magnitude of strength and bandwidth of the radiated electro-magnetic wave which may be due to the different characteristics of RLC of the spark plug and the bandwidth is proportional to the resistor of the circuit. But the spectrum wave form and center frequency are almost identical since both spark plugs have the same multiplier of inductor and capacitor of the circuit in the resonance circuit. This study concludes that the RLC characteristics of the spark plug has an important role on the strength and bandwidth of the radiated electro-magnetic wave.
비선형 스프링을 이용한 토크 컨버터 록업 스프링의 해석
문진성(Jinsung Moon),권기억(Ki Eak Kwon),조성욱(Seongwook Cho),이규봉(Guybong Lee),홍종해(Jonghae Hong) 한국자동차공학회 2002 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2002 No.5_2
자동 변속기 차량에 사용되는 토크 컨버터 내의 록업 스프링은 록업시 엔진의 불안정한 토크가 변속기로 직접 전달 되는 것을 막아 차량 동력 전달 시스템을 보다 안정화 시키는 역할을 하며, 차량 동력 전달계를 구성하는 요소들 중 상대적으로 설계 변경의 폭이 커 록업 스프링의 특성을 향상시킴으로써 차량 전체 시스템의 성질을 개선할 수 있다. 본 연구에서는 이러한 록업 스프링의 특성을 분석하여 작동 성능을 향상시키고, 등피치스프링으로 이루어진 록업 스프링에 부등 피치 스프링과 같은 비선형 스프링을 적용해 보고자 한다.
정규상(Gyusang Jeong),원삼용(Samyong Won),문진성(Jinsung Moon) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.5
The majority of fly ash pipes in thermal power stations use steel pipes. This makes frequent replacement inevitable due to severe abrasion near the hot and curved section of pipes. Recently, there have been efforts to prevent this abrasion with lining techniques using ceramic or basalt on the inner wall of the pipe. This study uses composite and anti-wear material to maximize the anti-abrasion effects on the hot section of the pipe. The thickness of the abrasion layer was determined by the abrasion ratio of material found through the experiment; the thickness of the reinforcement layer was determined by micromechanics. Experiments were conducted on epoxy resins to test for heat and abrasion. Anti-abrasion test using particle impingement was intended to recreate realistic conditions when abrasion occurs within the hot section of an actual pipe. This study analyzes the abrasion ratio obtained from both the specimen experiment and from on-site measurement and provides evidence that a combination of composites and anti-wear agent can be used to create a fly ash pipe that is lower in costs and higher in quality than what is used currently.