摘要
缸内直喷汽油机,即GDI(Gasoline Direct Injection)汽油机,相对于传统PFI(Port Fuel Injection)发动机具有动力性能好,燃油经济性好,低排放等优点,轨压控制是GDI汽油机的控制的重要一环。本文提出了一种前馈控制与PI反馈控制结合的复合控制策略,采用Matlab/Simulink与GT-FUEL联合仿真的方式验证该控制策略的可行性。联合仿真中,进行了轨压阶跃信号跟踪仿真,复合控制策略达到了理想的效果。
Compared with PFI（Port Fuel Injection） engine, GDI（Gasoline Direct Injection） engine has advantages on dynamic performance, fuel economy performance and emission performance. The control of rail pressure is one of the most crucial parts for GDI engine. A composite control strategy that consists of a feed-forward control strategy and PI close-loop control strategy has been put forward and tested through the co-simulation between Matlab/Simulink and GT-FUEL. In the co-simulation, step signal tracking simulation were conducted and the results reached the expectation.
出处
《汽车科技》
2017年第5期32-38,共7页
Auto Sci-Tech
