基于增益调度的高压共轨柴油机轨压控制研究及验证

于正同; 王骥超; 韩冰洁; 付立斌

doi:10.3969/j.issn.1001-2222.2020.06.010

车用发动机 ›› 2020, Vol. 0 ›› Issue (6) : 60-64. DOI: 10.3969/j.issn.1001-2222.2020.06.010

栏目

基于增益调度的高压共轨柴油机轨压控制研究及验证

于正同¹，王骥超¹，韩冰洁¹，付立斌²

作者信息 +

Research and Verification on Rail Pressure Control of High-Pressure Common Rail Diesel Engine Based on Gain Scheduling

YU Zhengtong¹,WANG Jichao¹,HAN Bingjie¹,FU Libin²

Author information +

文章历史 +

摘要

柴油机运行过程中，因工况切换及高压油泵和喷油器的工作特性易导致轨压控制滞后和异常波动，影响喷油控制精度，降低发动机的工作性能。设计了一种高压共轨柴油发动机轨压控制算法，该控制算法以共轨管燃油流量守恒为基础，采用基于增益调度的PID控制算法对发动机全工况下轨压统一处理控制。利用Matlab/Simulink对轨压控制算法建模仿真并生成代码，集成下载到自主研制的高压共轨发动机控制器中，完成了发动机台架试验。台架试验结果表明：在起动和稳态工况下，轨压波动差值控制在±2.0 MPa以内；在动态工况下，轨压波动差值控制在±3.0 MPa以内。该轨压控制算法具有良好的跟随性和响应速度，提高了轨压控制精度，能够满足高压共轨发动机轨压控制要求。

Abstract

The lag and abnormal fluctuation of rail pressure control occur due to the switching of working conditions and the working characteristics of highpressure fuel pump and injector during the operation of diesel engine, which affects the precision of fuel injection control and deteriorates the working performance of engine. Therefore, a rail pressure control algorithm for high-pressure common rail diesel engine was designed based on the principle of fuel flow conservation of common rail pipe and the PID control algorithm of gain scheduling was used to calculate and control the whole engine working condition. Simulink was then used to model and generate code for rail pressure control algorithm, which was integrated into the selfdeveloped controller of high pressure common rail engine, and the engine bench test was completed. The test results show that the rail pressure fluctuation is within ±1.5 MPa under steady-state conditions and within ±2.0 MPa under dynamic conditions. Accordingly, the rail pressure control algorithm has good following performance and response speed, improves the rail pressure control accuracy, and can meet the rail pressure control requirements of highpressure common rail engine.

导出引用

于正同，王骥超，韩冰洁，付立斌. 基于增益调度的高压共轨柴油机轨压控制研究及验证[J]. 车用发动机. 2020, 0(6): 60-64 https://doi.org/10.3969/j.issn.1001-2222.2020.06.010

YU Zhengtong,WANG Jichao,HAN Bingjie,FU Libin. Research and Verification on Rail Pressure Control of High-Pressure Common Rail Diesel Engine Based on Gain Scheduling[J]. Vehicle Engine. 2020, 0(6): 60-64 https://doi.org/10.3969/j.issn.1001-2222.2020.06.010