Control of Mixture Formation by Gas Flow and Combustion Chamber Shape in Fan Spray Direct-Injection Gasoline Engines-Investigation by Three-Dimensional Numerical Simulation:-Investigation by Three-Dimensional Numerical Simulation

概要

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A physical model for a fan spray from a slit injector is proposed. The behavior of a fan spray in a constant volume vessel, and in a direct-injection gasoline engine, has been numerically analyzed by means of the authors' GTT code. By comparing these calculated results with the experimental results, the spray model's validity has been confirmed. Three-dimensional numerical simulation using the GTT code has shown that mixing of air and fuel which has been injected early during the compression stroke progresses better in the case of the inclined swirl flow than in the case of the tumble flow. Furthermore, a modification to the piston head shape can improve the stratified mixture formation.
社団法人日本マリンエンジニアリング学会の論文