高压共轨柴油机共轨压力阶跃响应控制策略研究  

The Study of Rail Pressure Step Response Control Strategy for Common Rail Diesel Engine

作　　者：王洪荣[1] 邓鹏毅[2] 张衡[1] 

机构地区：[1]中国汽车工程研究院股份有限公司,重庆401122 [2]西华大学,成都610039

出　　处：《内燃机工程》2017年第2期114-117,共4页Chinese Internal Combustion Engine Engineering

基　　金：国家"八六三"高技术研究发展计划项目(2012AA111708);重庆市应用开发计划重点项目(cstc2013yykfB0088);西华大学汽车工程四川省高校重点实验室开放基金项目(szjj2015-050)

摘　　要：基于自主研发的高压共轨柴油机电控系统和轨压控制模型,研究发动机在动态工况下目标共轨压力阶跃响应时的设定值控制策略。引入轨压变化率和变化梯度来跟踪控制MAP查询得到的目标轨压的变化及变化趋势,在目标压力值有阶跃响应时,不直接应用MAP查询得到的值作为目标控制值,而是采用步长逐步增大,多步逐渐逼近MAP查询得到的目标轨压值的控制方式,并在发动机台架上进行了测试验证。测试结果表明:该方法可有效滤除因抖动或外界扰动引起的目标值突变,减少轨压控制超调量,并加快达到稳定目标轨压,改善发动机动态工况下的轨压控制响应性和稳定性。Based on the self-developed high pressure common rail diesel engine electronic control unit （ECU） and the rail pressure control model, the setting value control strategy for the target rail pressure step response of the engine under dynamic conditions was studied. The changes and trends of the target rail pressure obtained by the ECU MAP query were tracked and controlled by introducing the change rate of rail pressure and the gradient. When the target rail pressure value had a step response, a control method of gradually increasing step size and multistep approach to the target rail pressure value was adopted instead of directly using the ECU MAP query value as target control value, which was verified on the engine test bench. Test results show that the method can effectively filter out the mutation of target value caused by jitter or external disturbance, reduce the control of rail pressure beyond the adjustment and speed up the stability of the target rail pressure value, which will improve the fast response and stability of rail pressure control of the engine under dynamic conditions.

关 键 词：内燃机 共轨柴油机 轨压控制 阶跃响应 控制策略 

分 类 号：TK421.44[动力工程及工程热物理—动力机械及工程]