基于变海拔功率恢复的增压系统匹配计算研究

doi:10.3969/j.issn.1001-2222.2017.03.015

车用发动机 ›› 2017, Vol. 0 ›› Issue (3) : 82-87. DOI: 10.3969/j.issn.1001-2222.2017.03.015

栏目

基于变海拔功率恢复的增压系统匹配计算研究

谢海江1，李华雷2，邢卫东3

作者信息 +

Matching Calculation of Turbocharging System Based on Power Recovery at Different Altitudes

XIE Haijiang1, LI Hualei2, XING Weidong3

Author information +

文章历史 +

摘要

针对柴油机的变海拔功率恢复目标，进行了以增压压力恢复为目标的废气放气式增压系统匹配计算，确定了压气机和涡轮特性。在该匹配方案的基础上进行了柴油机变海拔运行范围的性能计算，得到了不同海拔高度的增压压力MAP图，并以目标增压压力为基准，根据放气阀的切换边界线确定了放气阀变海拔控制策略。研究结果表明：采用该匹配方案可以在海拔3 000 m和平原工况实现增压压力恢复，但在高海拔高转速工况下可能超速；随着海拔高度的降低，柴油机外特性扭矩值逐渐减小，而废气放气阀关闭状态的运行区域逐渐减小，废气放气阀调节状态的运行区域逐渐增大。

Abstract

For the power recovery of diesel engine, the matching
calculation of wastegate turbocharging system was carried out with the
purpose of boost pressure recovery and the compressor and turbine
characteristic were determined. The performance calculation was carried out
within the operating range of diesel engine at different altitudes and the
boost pressure MAP diagrams were achieved. The control strategies of wastegate valve were determined according to the switching boundary
linesbased on the target boost pressure. The research result show that the
matching scheme can recover the boost pressure at 3
000 m and 0 m, but may overspeed at high altitude and
high speed conditions. With the decrease of altitude, the full torque value of
diesel engine for every speed decreases. In addition, the operating zone of
wastegate valve closing state reduces and that of
wastegate adjusting state increases with the increase
of altitude.

导出引用

谢海江，李华雷，邢卫东. 基于变海拔功率恢复的增压系统匹配计算研究[J]. 车用发动机. 2017, 0(3): 82-87 https://doi.org/10.3969/j.issn.1001-2222.2017.03.015

XIE Haijiang1 LI Hualei, XING Weidong. Matching Calculation of Turbocharging System Based on Power Recovery at Different Altitudes[J]. Vehicle Engine. 2017, 0(3): 82-87 https://doi.org/10.3969/j.issn.1001-2222.2017.03.015