| 方烨，周文华，李哲帅.高压共轨柴油机轨压双闭环控制策略研究[J].内燃机工程,2017,38(6):106-110. |
| 高压共轨柴油机轨压双闭环控制策略研究 |
| Study on Double-Level Closed-Loop Rail Pressure Control Strategy for Common-Rail Diesel Engines |
| DOI： |
| 关键词:内燃机 高压共轨 压力控制 两级闭环控制 控制策略 |
| Key Words:IC engine high pressure common rail pressure control double level closed loop control control strategy |
| 基金项目: |
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| 摘要:为了改善共轨压力控制的精度和稳定，通过Matlab/Simulink完成高压共轨压力控制策略的建模和优化。针对执行器扰动带来的精度下降问题，设计了基于轨压和燃油计量阀驱动电流信号的两级闭环控制算法；针对闭环系统的时滞性，融合了前馈控制与反馈控制，提高了轨压控制精度与瞬态响应。最后在油泵台架与发动机台架上验证了该控制策略。试验结果表明，该策略的轨压稳态偏差在±0.5 MPa以内，瞬态偏差在±（2～5）MPa以内，满足车用柴油机的轨压控制需求。 |
| Abstract:In order to improve the accuracy and steadiness of rail pressure, modeling and optimizing of rail pressure control strategy were completed through the Matlab/Simulink. A double-level closed-loop control algorithm based on rail pressure signal and current signal of fuel meter valve was designed to enhance the control accuracy degenerated by actuators. A feed-forward control model was adopted to make transient response better. Finally the optimized control strategy was demonstrated with diesel fuel injection pump bench test and engine bench test. The result shows that the rail pressure deviation is within ±0.5 MPa at stable condition and within ±(2~5) MPa at transient condition, meeting the requirements of domestic common rail pressure control systems. |
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