抄録
To design diesel engines adapted to future exhaust gas regulations, it would be advantageout to have a driving mode simulator for vehicle performance and exhaust emissions, including after-treatment systems. A driving mode simulator with simple and high-speed calculation characteristics was developed with a diesel combustion model based on the Hiroyasu model. In the air entrainment model this report adds the effect of the air entrainment due to turbulent flow in a cylinder, and in the ignition delay model we considered the partial pressure of oxygen for better fitting the EGR effect. To simulate premixed compression ignition engines, the Schreiber's reduced kinetic model for ignition and combustion was also included. Arrhenius parameters for the rate constants were modified to fit the ignition delay. As a result it was possible to simulate low-temperature oxidation and the main combustion. The paper details the modifications and demonstrates the usefulness of the modified model by comparisons with experimental results.
