Fuel dilution ratio estimating method for diesel type internal combustion engine, involves reducing dilution ratio having threshold value, which is fraction of dilution ratio estimated at end of regeneration phase

摘要

The method involves estimating dilution ratio of a fuel in a diesel type internal combustion engine (1) of a motorization system by dilution variation based on a functioning mode of an internal combustion engine using a sensor (24), and reducing dilution ratio having a threshold value. The threshold value is a fraction of another dilution ratio estimated at an end of a regeneration phase required by a catalytic particle filter (3). The fraction is determined based on instantaneous engine speed, oil temperature, fuel flow or average actual pressure.