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1.6L 가솔린엔진에서 엔진 오일 상태에 따른 OCV 특성
신윤섭(Yunsub Sin),박상훈(Sanghoon Park),이경우(Kyungwoo Lee),손출배(Chulbea Son) 한국자동차공학회 2018 한국자동차공학회 부문종합 학술대회 Vol.2018 No.6
Currently, the automobile industry prefers high fuel consumption vehicles due to depletion of petroleum resources. In order to cope with increasing exhaust gas regulations, it is required to improve or develop various technologies such as supercharger application, light weight of vehicles, installation of aftertreatment device, downsizing of engine, And the like. Recently, gasoline vehicles have been adopting a CVVT (Continuously Variable Valve Timing) system that freely adjusts valve opening and closing times and periods according to the rotation range of the engine. The CVVT optimizes the valve timing in all operating ranges to improve output and torque and adjust valve overlap to reduce NOx and HC emissions, which are hazardous emissions, using internal EGR. Since the CVVT system is operated by oil, a device that can control the oil is needed. Its component is the oil control valve (OCV). The OCV adjusts the valve overlap by adjusting the opening and closing timing and duration of the valve by sending and exhausting engine oil to the crankcase and advance chamber of the CVVT system. In this paper, to evaluate the characteristics of OCV (Oil Control Valve), which is a core part of CVVT system, the response test and the stability test of valve according to the temperature and viscosity of engine oil were carried out in motoring engine condition. Test results show that the valve response is lower when the oil temperature is lower than when the temperature is higher. The lower the viscosity of the engine oil at lower temperatures, the better the response.
신윤섭(Yunsub Sin),서현규(Hyun Kyu Suh),이기수(Geesoo Lee),김현철(Hyunchul Kim),곽상신(Sangshin Kwak),신석신(Suk Shin Shin) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
In this work, the evaluation of swirl nozzle injection characteristics was performed by investigating effective area (Aeff), injection mass (minj), injection rate (Qinj), and injection delay (tdelay) under various test conditions in fuel injection characteristics measuring system. It was revealed that the difference of injection mass (minj) increased as the injection pressure (Pinj) and energizing duration (teng) decreased in the same test conditions. The maximum injection rate (Qinj) of swirl nozzle injector was higher than base nozzle injector about 2 ~ 5 %. At the same time, the injection performance of swirl type nozzle was better than base type nozzle at low injection pressure and short energizing duration conditions.
1.6L 가솔린엔진의 시제품 OCV 성능 평가 및 OCV 교체에 따른 연비 및 배출가스 비교
신윤섭(Yunsub Sin),박상훈(Sanghoon Park),이경우(Kyungwoo Lee),손출배(Chulbea Son) 한국자동차공학회 2017 한국자동차공학회 학술대회 및 전시회 Vol.2017 No.11
Currently, the automobile industry is developing or improving various technologies in order to cope with exhaust emission regulations and depletion of petroleum resources. These technologies include lighter cars, supercharger installation, after-treatment installation, engine downsizing, and variable valve timing. Recently, CVVT (Continuously Variable Valve Timing) system, which is a technology applied to gasoline vehicles, is used to freely adjust valve opening and closing times and periods according to the engine rotation range of the vehicle. This system, also referred to as variable valve timing, optimizes the valve timing in all operating areas of the engine to improve output and torque and adjust valve overlap to reduce harmful emissions using internal EGR and improve fuel economy. Since such a CVVT system is operated by engine oil, a device that can control the oil is needed. The component is an oil control valve (OCV). The OCV is a key part of the CVVT system, which regulates the opening and closing times of the valves by injecting oil into and out of the crankcase and advance chamber in the CVVT system. In this paper, we compare and evaluate the performance of the existing OCV and the prototype OCV under development, and compare the fuel consumption and exhaust gas amount by replacing the OCV.
2L 급 가솔린엔진에서 엔진인캡슐레이션 적용에 따른 엔진 냉각수 및 오일 온도 특성
신윤섭 ( Yunsub Sin ),한상욱 ( Sangwook Han ),김충희 ( Chunghui Kim ),김현철 ( Hyunchul Kim ),이기동 ( Kidong Lee ) 한국액체미립화학회 2016 한국액체미립화학회 학술강연회 논문집 Vol.2016 No.-
In this paper, an experiment was conducted in order to understand the coolant and oil temperature characteristics with engine encapsulation in a 2L-class gasoline engine. The test condition was general operating condition for 2L-class gasoline vehicle. The results showed that warm-up characteristics of coolant and engine oil temperature were similar between the base engine and encapsulation applied engine. On the other hand, the coolant and engine oil temperature of the encapsulation applied engine were higher at the cool down condition.