发动机冷起动污染控制技术研究

发动机在冷起动阶段由于空气温度低、燃油雾化不好、催化剂未能达到起燃温度,因而HC和CO污染严重。研究冷起动污染控制技术对发动机适应越来越严格的排放法规和改善环境污染具有重大意义。对目前国内外冷起动排放控制方面的最新技术和方案进行了阐述和研究,并提出了今后的发展方向。

Study on Control Technology for Engine Cold Starting Emissions

In the cold starting phase,because of the lower air temperature ,the worse fuel atomization,and the cata-lyst temperature being below initiat ion temperature,HC and CO emissions are high.It is of significance to study co ntrol techn ology for engine cold starting emissions for engine adaptation to th e more strict emissions regulations and environ-ment improvement.The newest t echnology and concept of cold starting emission control inside in both domestic and abroad are expanded and studied,and the developing direction is pointed ou t.