Prediction of Oil Dilution by Post-injection in DPF Regeneration Mode (First Report)

- Prediction of Fuel Adhesion Amount Based on 1-D Spray Development Model -

Abstract

A simplified model for estimation of fuel adhesion amount by post-injection in the DPF regeneration mode was developed in order to predict the engine oil dilution. Spray development process before the impingement on the cylinder wall was modeled based on 1-D spray development model considering the breakup and evaporation processes of fuel droplets. Fuel adhesion amount was estimated by judging the impingement of fuel droplets using physical values such as droplet diameter and velocity in the spray model.