Browse Publications Technical Papers 1999-01-0915
1999-03-01

Computational Model for Simulation of Diesel Injection Systems 1999-01-0915

Injection rate shaping is a powerful tool to control the combustion process and pollutants emission in DI Diesel engine. Recently, new injection systems that allow a more complete rate control have been developed.
This paper presents a model to simulate the hydrodynamics of these injection systems with two main objectives:
  • To determine the influence of the different injection system geometrical parameters and to explore different configurations to optimise the injection rate shape.
  • To determine the origin of the pressure perturbations that may appear in the system, due for example to interactions between injectors, and to quantify them.
This model has been developed with a modular approach that allows the simulation of very different injection system arrangements: classical pump-line-injector systems, common-rail system, and others. The paper describes:
  • The model structure and the physical hypotheses compared with those of the bibliography.
  • The methodology to characterise experimentally the main elements of the system.
  • The methodology to adjust and validate the model with experimental data.

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