过膨胀循环发动机配气相位偏差对充气模型精度的影响
Effect of Over-Expansion Cycle Engine Valve Phase Deviation on Air Charge Model Accuracy
张文韬 1冯朋朋 1郝伟 1徐宁宁 1周天鹏 1闫涛1
作者信息
- 1. 中国第一汽车股份有限公司研发总院,长春 130013
- 折叠
摘要
为提高过膨胀循环发动机充气模型精度,改善发动机性能及提高整车动态工况混合气控制,需精确控制发动机进气凸轮轴的相位.本文分析了进气凸轮轴的开启时刻与关闭时刻对充气模型的影响原理,从理论上分析了相位偏差对充气模型精度的影响,并通过试验验证不同相位偏差对充气模型精度的影响情况,为满足充气模型的偏差不超过±5%的精度需求,进气相位偏差需要控制在±1.5 °CA范围内.提出了通过控制装配机械相位精度及增加ECU相位偏差自学习模型的方式,修正进气相位偏差对充气模型的影响,经过试验验证了相位偏差控制的效果.
Abstract
In order to improve the accuracy of the over-expansion cycle engine air charge model,improve engine performance and improve the dynamic condition mixture control of the vehicle,it is necessary to accurately control the phase of the engine's intake valve.In this paper,the influence of the Intake Valve Open(IVO)timing and Intake Valve Close(IVC)timing on air charge model is analyzed,the influence of valve phase deviation on the accuracy of the air charge model is analyzed theoretically,and the influence of different valve phase deviations on the accuracy of the air charge model is verified by experiments,in order to meet the accuracy requirements of the air charge model deviation of no more than±5%,the intake valve phase deviation needs to be controlled within the range of±1.5 °CA.The influence of the intake phase deviation on the air charge model is corrected by controlling the phase accuracy of the assembly machinery and adding the Electronic Control Unit(ECU)phase deviation adaptive model,and the effect of phase deviation control is verified by experiments.
关键词
过膨胀循环/相位偏差/模型精度/相位修正Key words
Over-Expansion cycle/Phase deviation/Model accuracy/Phase correction引用本文复制引用
出版年
2025
NETL
NSTL
万方数据