Controlling the start of combustion on an HCCI diesel engine

In this paper we propose a control strategy to improve stability of the combustion of HCCI engines during sharp transients. This approach complements existing airpath and fuelpath controllers, and aims at accurately controlling the start of combustion (
soc
). For that purpose, injection time is adjusted based on a simple Knock Integral Model and real time intake manifold signals. Experimental results are presented, which stress the relevance of the approach.