Dynamic Analysis of Common Rail Injection System for Diesel Engine based on AMESim/Simulink Co-Simulation

Abstract

In common rail diesel engine, the characteristics of fuel injection is concerned both the structure parameters of injector and control strategy of control system (ECU). Thus, fuel injection system, engine performance system and ECU constitute an interactive feedback system. In this paper, first of all, using the AMESim/Simulink co-model for the common rail diesel engine prepared in the previous work, simulation and verification are performed in the AMESim/Simulink co-model based on the initial values of the diesel engine used in the case. Then it is done Simulation and Validation on the AMESim/Simulink co-mode. The engine dynamometer and injection rate test rig makes it possible to take measurements of the engine performance and injection rate in order to compare with the modelling results. This allows the obtained co-model to be validated. Validated model is very effective in describing and analyzing the transient behavior connections among injectors, high-pressure pump, and controller and engine parameters. This co-model was then used to analyze the effects of various structural parameters of injector on the response characteristics of the fuel injection system and engine operation.