실차 실험을 통한 승용 디젤엔진의 Urea-SCR을 위한 암모니아 흡장률 피드백 제어 분사전략 검증

국문 초록 (Abstract)

본 논문에서는 연비손실 없이 높은 NOX 저감성능을 보이는 승용 디젤 엔진의 SCR 시스템을 위한 요소수의 분사전략을 제시하였다. 배출되는 NOX량 대비 요소수가 화학량론적 1:1인 피드포워드 분사전략과 함께 모델기반의 촉매 내 NH3 흡장률 추정 기법을 통하여 피드백 분사 제어전략을 함께 사용함으로써 과도상태에서 NOX 저감성능과 NH3 슬립 성능을 모두 만족시키고자 하였다. 제안된 분사전략을 적용하여 디젤산화촉매기와, 미립자필터가 장착된 2.2L 디젤 엔진을 갖춘 실제 차량에서의 실험을 통하여 제어기의 높은 NOX 저감률과 낮은 NH3 슬립 성능을 검증하였다.

다국어 초록 (Multilingual Abstract)

In this study, a SCR system is employed to selectively reduce NOX, which is a major cause of environmental pollution and issues in diesel engines. In particular, this paper focuses on the combination of feedforward injection strategies, depending on the NO/NOX ratio, and feedback injection control, using NH3 coverage ratio, based on a SCR model. A 2.2 L passenger diesel engine, which is equipped with a diesel oxidation catalyst (DOC) and a diesel particle filter (DPF), was used in the experiments. The developed control algorithm is implemented on a real-time computer with injection control algorithm. By analyzing the NOX emission measurement, the performance of the proposed injection control algorithm is verified.

목차 (Table of Contents)

• 초록
• Abstract
• 1. 서론
• 2. DeNOX SCR 시스템 모델링
• 3. SCR 실험장치 구성
• 4. 요소수 수용액 분사 전략
• 5. 결론
• 참고문헌

참고문헌 (Reference)

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