CUED Publications database

Diesel Cylinder Charge Properties: Feed-Forward Control and Cycle-by-Cycle Analysis Using an In-Cylinder Gas Sampling System

Darlington, A and Collings, N and Glover, K (2011) Diesel Cylinder Charge Properties: Feed-Forward Control and Cycle-by-Cycle Analysis Using an In-Cylinder Gas Sampling System. SAE International Journal of Engines, 4. pp. 861-873. ISSN 1946-3936

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Abstract

Common-rail fuel injection systems on modern light duty diesel engines are effectively able to respond instantaneously to changes in the demanded injection quantity. In contrast, the air-system is subject to significantly slower dynamics, primarily due to filling/emptying effects in the manifolds and turbocharger inertia. The behaviour of the air-path in a diesel engine is therefore the main limiting factor in terms of engine-out emissions during transient operation. This paper presents a simple mean-value model for the air-path during throttled operation, which is used to design a feed-forward controller that delivers very rapid changes in the in-cylinder charge properties. The feed-forward control action is validated using a state-of-the-art sampling system that allows true cycle-by-cycle measurement of the in-cylinder CO2 concentration. © 2011 SAE International.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div A > Energy
Div F > Control
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 12:02
Last Modified: 27 Nov 2014 19:19
DOI: 10.4271/2011-01-0709