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가솔린 기관의 희박연소를 위한 기화 혼합장치내의 혼합기 유동 특성에 관한 연구
장종관 陸軍士官學校 1990 한국군사학논집 Vol.38 No.-
혼합기의 유동 속도 및 온도를 측정함으로써 혼합기의 기화 특성을 밝힐 수 있었다. 중요한 결과들을 열거하면 다음과 같다. (1) 기화 혼합 장치의 최적 가열 온도는 75℃~80℃이다. (2) 혼합기의 가열에 의한 희박 한계는 공기 연료비 21:1이다. (3) 혼합기의 흡기관내 유동은 층상적인 분포 유동을 한다. (4) 기화기에서 연료의 분무시 기화율 및 액적율 그리고 액막율은 공기 연료비와 흡입 공기 온도에 따라 다르지만 29℃의 흡입 공기 온도에서 각각 41~30%, 37~50%, 22~10%이다.
자동차용 토크 컨버터의 성능에 미치는 순환 작동오일의 온도 및 압력 영향에 관한 실험적 연구
장종관 영남이공대학 산업기술연구소 2000 産業技術硏究 Vol.12 No.-
The torque converter, a main part of automatic transmission for passenger car, is so useful to be handled, but specially in rage of low speed ratio it has many problems such as low power transmission efficiency. These are mainly caused by the slip of working fluid oil between impeller and turbine. Because of this slip, the temperature of working fluid oil is increased too high to be used long at stall status. So the theoretical analysis about them has been done but there have been still so much difficulties due to complex of internal geometry and various operation conditions of the torque converter. Therefore in this paper, the experimental analysis is carried out to observe the influences of temperature and pressure of working fluid oil upon the performance of torque converter. The effects of operating temperature and pressure on performance characteristics of torque converter are introduced for optimum operation.
SI 기관의 노크 발생시 말단 가스의 거동에 관한 연구
張鍾寬 영남이공대학 산업기술연구소 1996 産業技術硏究 Vol.9 No.-
A serious damages and power decrease of engine are generally caused by on-set of knock, which is spontaneous combustion of end gas. The basic behavior of end gas has to be detailly studied for the control and restriction of knock. In this paper, pressure sensor was installed to measure the pressure behavior in the end gas region and calculated chain carrier as well as increased rate of mass burned to analysis the end gas behaviors. At on-set of knock the pressure frequency of end gas was measured 2-10 ㎑. The main results are as followings. (1) The concentration of chain carrier and pressure increased rate of end gas were rapidly rised when knock was occured. (2) Although the ignition delay time of end gas needed to be some times, necessary time of autoignition of end gas was zero("O") on knocking. (3) The Knock amplitude was increased in proportion to the mass of end gas (4) To be knock occured with pressure oscillation, there was above 18% of end gas at this experiment. Therefore minimum end gas needs to be continuousely studied about other engines when engine knocked. In conclusion the chain carrier reaction in the end gas region must be restricted within the narrow limits to control or prevent the engine from knock. And alternative-fuel including the new fuel-additives has to be delveloped.
완전혼합에 의한 희박 연소기관이 배기성능과 연료경제성 향상에 관한 연구
장종관 陸軍士官學校 1989 한국군사학논집 Vol.36 No.-
The exhaust emission, fuel economy and the power must be considered as performance of an automobile gasoline engine. But it may be very difficult for these three problems to be satisfied simultaneously. Assuming that the emission and fuel economy will be able to be improved at any way, the power may be controlled to some extent by means of the larger displacement engine, turbo-charged engine or a Variable Displacement engine(V.D.E). Therefore this paper was studied on a Lean Burn Spark Ignited Engine that is useful for exhaust emission and fuel economy. The main results are (1) that the Lean Burn Limit is expanded to 21:1 by means of heating the inlet manifold over 75℃, (2) that the exhaust emission(CO, HC, NOx) is highly decreased and (3) that 18 percentage of fuel consumption rate is decreased as the thermal dfficiency is increased.