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SI-HCCI Mode Transitions without Open-Loop Sequence Scheduling: Online Parameter Adaptation

[+] Author and Article Information
Patrick Gorzelic

Department of Mechanical Engineering University of Michigan Ann Arbor, MI 48109
pgoz@umich.edu

Anna G. Stefanopoulou

Department of Mechanical Engineering University of Michigan Ann Arbor, MI 48109
annastef@umich.edu

Jeff Sterniak

Robert Bosch LLC Farmington Hills, MI 48331
jeff.sterniak@us.bosch.com

1Corresponding author.

ASME doi:10.1115/1.4036407 History: Received September 29, 2015; Revised February 16, 2017

Abstract

A parameter adaptation method for a previously developed spark ignition (SI) to homogeneous charge compression ignition (HCCI) combustion mode transition control architecture is described. The goal of the adaptive method is to use transient SI-HCCI transition data gathered in online operation to tune the controller model parameters on a cylinder individual basis, in order to improve the accuracy of the controller's model-based calculations and account for cylinder to cylinder variability and drifts over time. The parameter adaptation is implemented on an experimental engine in an indirect adaptive control structure where the model parameters of the SI-HCCI transition controller are updated based on real-time measurements and used in subsequent model-based calculations. Comparison of SI-HCCI transition responses before and after adaptation at a single operating condition shows notable benefits from use of the adaptive method. When tested at differing operating points, the performance of the adapted controller remains overwhelmingly favorable to that of the baseline controller even when conditioned on data from only a single operating point.

Copyright (c) 2017 by ASME
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