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전자제어식 냉각시스템이 연비에 미치는 영향에 관한 연구
인병덕(Byungdeok In),이기형(Kihyung Lee) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
Recently, the internal combustion engines have focused on reducing both the CO2 emissions in order to cope with severe regulations for greenhouse effect. Therefore, various new technologies have been developed in many countries. Among them, the cooling system is spotlighted because it has great effect on fuel efficiency. However, the present engine cooling system is almost same as one of the 50 years ago. The needs for high performance and compact size make it important to improve engine cooling system, down-sizing and control method of coolant flow. Thus, low fuel consumption technology such as control and synthetic management of cooling system was necessary to satisfy with these needs. In this study, we applied electric thermostat to improve the fuel economy. The fuel consumption was compared after driving FTP-75 mode on both conditions which were with a conventional wax thermostat and with a electric thermostat. The coolant temperature of opening the electric thermostat is higher
열전소자의 발전 특성을 위한 엔진 배기가스의 조건 변화에 따른 수치해석 연구
인병덕(Byungdeok In),박상기(Sangki Park),이기형(Kihyung Lee) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
Internal combustion engines rejects 30-40% of the energy supplied by fuel to the environment through exhaust gas. thus, there is a possibility for further significant improvement of efficiency with the utilization of exhaust gas energy and its conversion to mechanical energy or electrical energy. The Thermo-Electric Generator (TEG) will be located in the exhaust system and will make use of an energy flow between the warmer exhaust gas and the external environment. Predict to th optimum position of temperature distribution and the performance of TEG through numerical analysis. The experimental results obtained show that the power output significantly increases with the temperature difference between cold and hot sides of thermoelectric generator.
GDI 엔진에서 EGR 적용에 따른 연소 및 배기특성에 관한 연구
김민호(Minho Kim),인병덕(Byungdeok In),이기형(Kihyung Lee) 한국연소학회 2014 KOSCOSYMPOSIUM논문집 Vol.2014 No.5
In a gasoline direct injection engine, the use of MBT (maximum brake-torque timing) is limited in the mid/high load condition because of knocking at high temperatures as the amount of load increases, just as in the case of port fuel injection gasoline engines, and this leads to a reduction of the engine’s thermal efficiency. This study aims to adopt the cooled EGR system to GDI engines for the reduction of pumping loss and NOx.As a gasoline engine controls air volume, it unavoidably involves a higher pumping loss. Pumping loss can be reduced, however, by adopting a cooled EGR system.
엔진 배기가스의 열적조건 변화에 따른 열전소자의 발전 특성 연구
박상기(Sangki Park),인병덕(Byungdeok In),이기형(Kihyung Lee) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
Internal combustion engines rejects 30-40% of the energy supplied by fuel to the environment through exhaust gas. thus, there is a possibility for further significant improvement of efficiency with the utilization of exhaust gas energy and its conversion to mechanical energy or electrical energy. The Thermo-Electric Generator (TEG) will be located in the exhaust system and will make use of an energy flow between the warmer exhaust gas and the external environment. Experiments are performed to investigate the key parameters determing the performance of thermoelectric power generation. The experimental results obtained show that the power output significantly increases with the temperature difference between cold and hot sides of thermoelectric generator. The conversion efficiency defined as the ratio of the power generated to the heat absorbed at the hot side increases with the temperature difference. The maximum conversion efficiency is linearly increased with the temperature difference.