A physics-based approach to the control of homogeneous charge compression ignition engines with variable valve actuation
A physics-based approach to the control of homogeneous charge compression ignition engines with variable valve actuation
复制标题
基于物理的方法来控制具有可变气门驱动的均质充量压燃式发动机
DOI：
--
复制
发表时间：
2005
期刊：
影响因子：
--
通讯作者：
J. Gerdes
中科院分区：
文献类型：
--
作者：
G. Shaver;M. Roelle;P. Caton;N. Kaahaaina;N. Ravi;J. Hathout;Jasim Ahmed;A. Kojic;Sungbaek Park;C. F. Edwards;J. Gerdes
摘要均质充量压燃（HCCI）是一种很有前途的降低NOx排放和提高内燃机效率的低温燃烧策略。然而，HCCI没有直接燃烧引发器，并且当通过用可变气门致动（VVA）系统再引导或捕集残余排气来实现时，由于残余气体的温度将一个循环耦合到下一个循环，所以HCCI变成动态过程。这些受残余物影响的HCCI特性对控制工程师提出了挑战，也是在生产发动机中实施HCCI的障碍。为了解决这些挑战，本文概述了VVA系统和HCCI燃烧过程的基于物理的控制策略。结果表明，VVA系统控制可以提供任意的阀门定时的循环到循环的基础上，使HCCI的严格控制。通过将这些气门正时进一步抽象为引入的气体成分和有效压缩比，可以开发基于模型的控制器以同时控制HCCI发动机中的负载和燃烧正时。
Abstract Homogeneous charge compression ignition (HCCI) is a promising low-temperature combustion strategy for reducing NOx emissions and increasing efficiency in internal combustion engines. However, HCCI has no direct combustion initiator and, when achieved by reinducting or trapping residual exhaust gas with a variable valve actuation (VVA) system, becomes a dynamic process as the temperature of the residual gas couples one cycle to the next. These characteristics of residual-affected HCCI present a challenge for control engineers and a barrier to implementing HCCI in a production engine. In order to address these challenges, this paper outlines physics-based control strategies for both the VVA system and the HCCI combustion process. The results show that VVA system control can provide arbitrary valve timings on a cycle-to-cycle basis, enabling tight control of HCCI. By abstracting these valve timings further into an inducted gas composition and an effective compression ratio, model-based controllers can be developed to control simultaneously load and combustion timing in an HCCI engine.