基于油压策略的柴油机瞬变过程烟度优化研究-中国电机工程学报.PDF

第36 卷 第16 期 中 国 电 机 工 程 学 报 Vol.36 No.16 Aug. 20, 2016 4490 2016 年8 月20 日 Proceedings of the CSEE ©2016 Chin.Soc.for Elec.Eng. DOI ：10.13334/j.0258-8013.pcsee.160381 文章编号：0258-8013 (2016) 16-4490-07 中图分类号：TK 421 基于油压策略的柴油机瞬变过程烟度优化研究 刘忠长，于凯波，田径，许允，亓升林，腾鹏坤 (吉林大学汽车仿真与控制国家重点实验室，吉林省 长春市 130022) Study on Soot Optimization in Diesel Transient Process Based on Fuel Injection Strategies LIU Zhongchang, YU Kaibo, TIAN Jing, XU Yun, QI Shenglin, TENG Pengkun (State Key Laboratory of Automobile Simulation and Control, Jilin University, Changchun 130022, Jilin Province, China) ABSTRACT: Aimed at reduction of smoke emission, the 燃油经济性恶化，而采用分段增油压策略能够有效抑制这一 influence of fuel injection strategies on combustion and soot 恶化趋势。 emission was conducted in two-stage turbocharged diesel 关键词：柴油机；二级增压；瞬变工况；喷油压力；微粒排放 engine with a by-pass valve under typical 5s transient process of constant speed and increase toque. The test results show 0 引言 that: two-stage turbocharger can be allowed to improve intake 根据国内主要城市汽车道路行驶工况的调查 air supply, and provide significant soot reduction as the valve was closed under full-stage rail pressure augment strategy, but 统计，在怠速、加速、减速和匀速四种汽车行驶过 soot deterioration happened once valve opening got larger; with 程中，瞬变工况行驶时间占54.8%，而匀速行驶时 small valve opening, sectional-stage fuel injection augment 间的比例不超过30%[1]，表明车用发动机大部分时 strategy can be provided to improve in-cylinder 间运行在瞬变工况，油气供给瞬时变化也造成发动 thermodynamics conditions during early transient process, and 机工况特性与稳态工况差异较大，微粒排放、工作 then enhance air-fuel mixture much more better