调制多脉冲喷油策略的实现及对HCCI燃烧过程影响的研究  

A Study of Realization of Modulated Multi-Pulse Injection Mode and Its Effects on HCCI Combustion

作　　者：王辉[1] 苏万华[1] 刘斌[1] 林铁坚[1] 

机构地区：[1]天津大学内燃机燃烧学国家重点实验室,天津300072

出　　处：《内燃机学报》2005年第5期385-391,共7页Transactions of Csice

基　　金：国家重点基础研究发展规划资助项目(2001CB209202)

摘　　要：基于减少燃油在气缸壁面的黏附,促进混合气的温度和浓度分层的思想,开发了一套基于PC机的调制多脉冲燃油喷射电控开发系统,通过系统硬件的抗干扰和可靠性设计,以及综合运用中断技术、直接存储器存取(DMA)技术和扩充内存规范(EMS),可以实时、独立的对多脉冲控制参数如脉冲次数、脉冲宽度和脉冲间隔进行调制,形成调制的多脉冲喷油模式。在此基础上,进行4次脉冲喷射交错式(SM)和驼峰式(HM)喷油模式的对比试验,结果表明喷油模式HM更有利于HCCI燃烧。喷油定时为90°CA BTDC,喷油模式HM的当量平均指示压力为6.43 kPa/mg,比模式SM提高28.6%;而NOx和烟度排放分别为0.16 g/(kW.h)(7×10-6)和0.5 BSU。Based on the idea of decreasing cylinder wall wetting and improving mixture distribution, a multi-pulse injection system was developed on a PC. Through reliability and anti-jamming designing of the hardware and the combination PC interruption, DMA with EMS memory extending technique in the software, the pulse width, dwell time and the number of multi-pulse injection could be adjusted individually and flexibly in real time. Through varying electronic control signals such as pulse width and dwell time for each individual pulse, the so-called staggered mode （SM） and hump mode （HM） with four pulses were designed. The experimental results showed that HCCI combustion was sensitive to injection mode. At injection starting timing of 90°CA BTDC, the equivalent indicated mean effective pressure of HM was 6.43 kPa/mg, 28.6% higher than that of SM, where NOx emissions were 0.16 g/（kW·h） （7×10^-6） and smoke emission was 0.5 BSU.

关 键 词：多脉冲喷射 电控开发系统 喷油模式 均质压燃 柴油机 

分 类 号：TK421.4[动力工程及工程热物理—动力机械及工程]