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Active Air Flap과 전동 냉각부품을 이용한 차량열관리
이용규(Yongkyu Lee),박진일(Jinil Park),이종화(Jonghwa Lee),박경석(Kyoungseok Park),김광연(Kwangyeon Kim),이준호(Junho Lee) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
VTMS(Vehicle Thermal Management System) reduces heat loss of internal combustion engine by using active control cooling system. For VTMS control, Some mechanical cooling parts are necessary to change electric cooling parts. Because mechanical cooling parts can not control actively. Changing cooling parts for the active control are electric thermo-stat, electric water pump, electric cooling fan, AAF and etc. Of these Items, AAF is a device which decreases the aerodynamics of the vehicle by changing the shape of the front of the vehicle. It has a significant effect to decrease the aerodynamics of the vehicle. But it reduces cooling effect due to reducing the flow of air which supplied to the radiator. For this reason, VTMS algorithm which control cooling parts includes AAF control algorithm. In this study, AAF, electric water pump and electric thermo-stat are installed at test vehicle to configure the VTMS. And VTMS algorithm which control cooling parts is constructed. It is analyzed to confirm the operation through the experimental results. Also fuel economy improvement is confirmed.
생육 정보 수집을 위한 딥러닝 기반의 관측 오차 영역 추정 및 장애물에 가려진 객체 인식
박진성(Jin-Seong Park),김상철(Sang-Cheol Kim) 제어로봇시스템학회 2021 제어·로봇·시스템학회 논문지 Vol.27 No.12
Growth information in smart farms is essential to optimize the farm environment for crops and livestock. In this study, we verified the performance of a system for the collection of paprika growth information using semantic segmentation. Although most current deep learning methods recognize objects along the outline, this study investigated the recognition of objects hidden by obstacles during the growth investigation process. In addition, the ability of the artificial intelligence method to recognize only the stems necessary for growth investigation among several stems of paprika was investigated. Furthermore, the application of the deep learning method to areas where errors may occur depending on the observer was examined. The experimental results revealed that the deep learning models recognized and estimated objects covered by obstacles, and only objects necessary for growth investigation were recognized within a certain error. For practical use, an optimized model was proposed, and the model exhibited an mIoU of 0.7369.
2.0 Turbo-GDI 차량의 수랭식 인터쿨러 적용 및 평가
이용규(Yongkyu Lee),박진일(Jinil Park),이종화(Jonghwa Lee),박경석(Kyoungseok Park),김광연(Kwangyeon Kim),이준호(Junho Lee) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
There are two types of cooler for cooling charged air. Air cooled air cooler and water cooled air cooler are those. Air cooled air cooler has simple installation and low price. So it is widely used. But it has low cooling efficiency at repeated rapid acceleration driving. Because it is cooled by air which has lower Specific-Heat than water. And cause of long path, it doesnt have good turbo lag. Water cooled air cooler has complicated installation and high price. However it has high cooling efficiency at repeated rapid acceleration driving. Because it is cooled by water which has higher Specific-Heat than air. Also, it has good turbo lag. Because it has shorter path than air cooled air cooler. In this study, confirm the cooling efficiency and improvement of turbo lag on the turbo system which Intercooler system is changed air cooled air cooler to water cooled air cooler.
박상준(Sangjoon Park),이난규(Nankyu Lee),이용규(Yongkyu Lee),박진일(Jinil Park),이종화(Jonghwa Lee) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
Although effects of mechanical friction loss by Transmission is too small than other factors on FTP75 mode, because of heavy regulation about CO₂ and Fuel-economy, most of company try to improve fuel economy for transmission 워머-up using ATF 워머. The transmission friction loss that occur from process of delivery power from engine to wheels is affected by mechanical friction from rotation of gear and temperature of transmission oil. This effect is caused because the oil"s viscosity is influenced by temperature and the mechanical friction of transmission is drop down if the temperature is increased. In this study, the test is processed by the way of comprehending each gear stage"s characteristics by variable oil temperature. The characteristic is tested on a vehicle and the result is compared with theoretical value of kinematic viscosity.
박재형 ( Jaehyeong Park ),박미화 ( Meehwa Park ),이용규 ( Yongkyu Lee ) 한국정보처리학회 2008 한국정보처리학회 학술대회논문집 Vol.15 No.1
본 논문에서는 주문형 데이터 방송 환경에서 다양한 정보를 요청하는 클라이언트에게 원하는 정보를 보다 빠르게 제공하며, 우수 사용자 그룹이 일반 사용자 그룹보다 신속하게 서비스를 제공받을 수 있도록 하는 멀티채널 스케줄링 알고리즘을 제시하였다. 제안하는 스케줄링 방법은 클라이언트의 요청 데이터를 요청 빈도와 클라이언트의 우선순위에 따라 등급별 큐에 적재하고 채널 할당 알고리즘에 따라 채널을 할당한 후 주기적으로 방송하는 것이다. 우선순위 큐를 이용함으로써 일반 클라이언트 그룹과 우선순위 클라이언트 그룹에 대한 차별화된 서비스를 제공할 수 있었으며, 동적인 채널 할당 비율 실험을 통해 각 사용자 그룹에 대한 평균 접근 시간의 변화를 비교 분석할 수 있었다.
연소제어 전략 및 분사기 위치 변경에 따른 직접분사식 초희박 LPG 엔진의 연소특성 연구
박철웅(Cheolwoong Park),박윤서(Yunseo Park),이용규(Yonggyu Lee),오승묵(Seungmook Oh),김태영(Taeyoung Kim) 한국자동차공학회 2014 한국 자동차공학회논문집 Vol.22 No.4
The technologies employing spray-guided type combustion system for ultra-lean combustion direct injection engine is focused as a promising technology for satisfying emission regulations and improving fuel economy. In the present study, control and design optimization of lean-burn LPG direct injection engine was carried out with control strategy and injection position changes. Inter-injection spark ignition strategy was applied and the effect of the strategy was assessed at relatively higher load operation condition than previous researches. In order to create richer mixture in the vicinity of spark plug electrode, relative distance between the dead-end of injector and the electrode of spark plug was changed.