Diesel engine control optimization for transient operation with lean/rich switches

Abstract

Transient operation of a direct injection heavy duty (DI HD) diesel engine equipped with an NO_x storage catalyst (NSC) was simulated using a ‘virtual powerplant’ simulation code with a zero-dimensional multizone combustion model. For the regeneration of the NSC the engine is required to work with lean/rich operation switches, which necessitates advanced engine management schemes for the fuelling, throttle and turbocharger wastegate. An optimization procedure, using the simulation model, resulted in a proposed schedule for the control of the various engine components involved in such engine operation.

Keywords

transient engine simulation multizone combustion model emissions engine control optimization methodology

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