Optimal design of rail pressure control for ultra high pressure common rail system based on ISIGHT and AMESim

DOI:	10.11809/bqzbgcxb2023.10.033
Keywords:	ultra high pressure common rail system; common rail tube; ISIGHT; PID control; AMESim; simulation; optimization
Abstract:	In order to improve the common rail tube sensitivity and reduce the rail pressure fluctuation under a specific fuel supply and injection law, the geometry of the common rail tube and the parameters of the PID rail pressure controller of the UHV system are optimized while avoiding substantial modification of the common rail system of the diesel engine.With reference to the diesel engine UHP common rail system experimental rig, the UHP common rail system is simulated using AMESim to simulate the generation of pressure fluctuations under real conditions.The ISIGHT optimization software is used to analyze the parameter sensitivity of the influence law of the common rail pipe geometric parameters, and the NSGA Ⅱ algorithm is used to optimize the design of the common rail pipe geometric parameters and PID controller parameters.The rail pressure sensitivity and stability of the common rail pipe are improved after optimization, in which the rail pressure stability performance is significantly improved by 9.13%, and the rail pressure reaction time is shortened by 1.06%.Then the same method is used to optimize the PID rail pressure control parameters, and the optimization effect is obvious.
Issue:	Vol. 44 No. 10 (2023)
Published:	2023-10-28
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