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허동한(Donghan Hur),정지훈(Jihoon Jung),이정준(Jungjun Lee),김석(Seok Kim),이준규(Joonkyu Lee),이주헌(JooHun Lee) 한국자동차공학회 2020 한국자동차공학회 학술대회 및 전시회 Vol.2020 No.11
The advanced method of temperature control by physical model has been developed to achieve more stable temperature control while DPF regeneration mode is active. To apply this new control strategy, the exhaust gas temperature has to be precisely modeled at first On the engine side, the combustion efficiency model was constructed using experimental study so that the unburned fuel in cylinder could be estimated under the various conditions. On the catalyst side, the thermodynamic law helped to calculate the exothermic energy from the unburned fuel. And heat transfer and energy equation determined the temperature behavior at both slice and gas side in the channels of the catalyst. Lastly, temperature loss in the pipe between LNT and DPF was modeled by heat equivalent equation. The model based temperature control can be realized by the reverse of the temperature model. The demanded post fuel quantity was calculated from demanded temperature profile inside the catalyst. The accuracy of the new control method was fully validated in various vehicles which are driven in real road.
빌트인 캠 시스템 충격감지성능 인자 분석을 통한 주차 충격 감지 로직 최적화
최재룡(Jaeryong Choi),전성환(Sunghwan Jun),김경준(Kyoungjun Kim),손정덕(Jungduck Son),노승엽(Seungyeop Noh),이정준(Jungjun Lee) 한국자동차공학회 2023 한국자동차공학회 부문종합 학술대회 Vol.2023 No.5
Since the HMC first built-in Cam 1, was first applied in 2019, many improvements (improved camera quality and “Voice recording assistance”..) have been made, and a built-in Cam 2 with these improvements is under development. However, regarding the “parking impact detection performance” that is part of the VOC , the problem is not simply solved by adding or improving functions like previous improvements. In detail, some of the VOCs may express complaints due to frequent impact detection among the parking recording functions, and others may express complaints due to “undetected impact which should be detected”. In order to simultaneously resolve complaints of false detection and non-detection with such trade-off attributes, fundamental improvement should be made through factor analysis and result comparison of the logic. This paper is a study to analyze control factors for the corresponding functional logic and find an optimal combination in order to fundamentally improve the impact detection performance.