车用CNG 发动机电控系统的开发.pdf

39 3 V o . 39 No. 3 2010 6 SMALL INTERNA L COMBU ST ION ENG INE AND MOTORCYCLE Jun. 2010 * 车用 CNG发动机电控系统的开发 ( 100124) : 针对车用天然气发动机, 笔者自主开发了一套新型电控系统该系统采用多片式 ECU 设计, 中怠速控制系统采用 P ID策略通过控制步进电机动作来进行怠速闭环控制, 并通过串口和 I2C 分 别与实验监控系统和 他子系统通信; 点火系统分别通过控制初级点火线圈的闭合( 通电) 时间断 电时刻来主动控制点火能量和点火提前角; 天然气喷射系统通过控制燃料喷射阀的通电时间来达到 控制燃料喷射量的目的同时, 开发了一套实验监控系统, 对发动机电控系统的工作参数实时监控 将该电控系统应用于 JL4 65Q5车用天然气发动机, 台架试验结果表明: 电控系统运行可靠, 满足设计 要求 : CNG : TK431 : A : 1671- 0630 ( 2010) 0 3- 0029- 04 Development ofElectronic Control System for AutomotiveCNG Engines WangDaojing, ZhangHongguang, Liu ai, ZhengGuoyong, BaiXiaole,i LiangHong, WuDi Co ege o f Env ironm enta and Energy Eng ineering, Be ijing University o f T echno ogy ( Be ijing, 100124, Ch ina) Abstract: A new type of e ectronic contro system w as deve oped for automo tive eng ines fue ed w ith com pressed natura gas ( CNG). A m u t im icrocontro er strategy w as u sed for ECU design. T he id e speed contro subsys tem contro ed the id e speed in c osedoop by stepperm oto rw ith P ID a gorithm. It w as a so u sed for commun i cating w ith the tun ing up and monitoring system through 12C and comm unicating w ith other subsystem s by seria interface. For the ignition contro subsystem, the spark ignit ion energy w as contro ed by adjust ing the charg ing tmi e o f the prmi ary ignition co i, and the spark advance ang e w as regu ated by the pow eroff t mi e. T he natura gas in ject ion quant ity was regu ated by the turnon tmi e of the fue inject ion no