发动机启动过程的性能研究  

The Performance of The Engine Starting Process Research

作　　者：李永锋[1] 陈国华[1] 黄永军[1] 魏冰[1] 

机构地区：[1]华中科技大学

出　　处：《内燃机与配件》2015年第5期6-9,共4页Internal Combustion Engine & Parts

摘　　要：本文在博世ME7电控系统的基础上研究了汽油机启动过程中的控制逻辑,具体分析了发动机冷启动和热启动过程中的喷油量衰减特性,以及启动过程中空燃比和点火提前角的变化规律,然后将启动过程的控制算法烧写到自主开发的ECU中。台架测试结果表明,自主研发的ECU能够快速启动发动机,各种启动工况下喷油量的衰减特性以及空燃比和点火提前角的变化规律均在理想范围之内。In the paper, based on BOSCH ME7 electric control system, we studied the control strategy in the process of gasoline engine start, mainly analyzed the injection volume attenuation characteristies in the process of cold start and hot start, the air/oil ratio and ignition advance angle change rule, then downloaded the control algorithm in independent development ECU. The bench test results show that, ECU can quickly start the engine, various startup conditions attenuation characteristics of fuel injection quantity and the changing role of the air - fuel ratio and ignition advance angle were within the ideal range.

关 键 词：冷启动 热启动 喷油脉宽 空燃比 点火角 

分 类 号：U464[机械工程—车辆工程]