共轨柴油机轨压控制研究

研究高压共轨柴油机共轨压力的控制策略及其控制参数优化.分析了调压阀特性及其控制参数,研究了调压阀控制频率、共轨压力采样周期和压力闭环调节周期对压力控制的影响及共轨压力对发动机性能的影响,确立了发动机全工况目标轨压控制策略.发动机台架试验表明,选取的调压阀控制频率、轨压采样周期、压力闭环控制周期及轨压的发动机匹配、修正策略可满足共轨柴油机的要求.

Pressure Controll of High PressureCommon Rail Diesel Engine

Studies the rail pressure controll strategy and control parameters optimization of high pressure common rail diesel engine.Pressure control valve's specialities and control parameters are analyzed.Influences of the single control frequency,pressure sampling period and the loop control interval period for rail pressure control are studied.Control strategies of target set-point rail pressure value and corrections at different working conditions are designed.And the rail pressure sampling,controlling and corrections strategies are tested on engine test bench.It was proved that the pressure sampling,controll strategies could control the rail pressure at any value on any engine working conditions,and fulfill the needs of the common rail diesel engine.