Objective Determination of Minimum Engine Mapping Requirements for Optimal SI DIVCP Engine Calibration

2009-01-0246

04/20/2009

Event
SAE World Congress & Exhibition
Authors Abstract
Content
In response to marketplace demand for increased engine performance and economy, spark-ignition (SI) engine applications with dual-independent variable cam-phaser actuators (DIVCP) are now commonplace.
In this paper, the minimum number of test measurements required to optimally calibrate the steady-state spark advance and cam-phaser settings of a SI DIVCP engine was determined, using a high-fidelity model of a 2.2L SI DIVCP engine with predictive combustion capability as a basis.
A calibration development process was designed to objectively determine the minimum number of torque vs. spark advance sweeps required for the SI DIVCP engine.
First, Torque production results from calibration tables based on cost-feasible sets of 52, 96, 173, 250, 329, and 406 sweeps were determined. Next, calibration reference tables were developed from an exhaustive data collection process based on 10,000 sweeps. Finally, torque results from the cost-feasible calibrations were compared to the torque results from the exhaustive reference calibrations tables to determine the minimum number of sweeps required to match the results of the exhaustive approach.
Meta TagsDetails
DOI
https://doi.org/10.4271/2009-01-0246
Pages
29
Citation
Maloney, P., "Objective Determination of Minimum Engine Mapping Requirements for Optimal SI DIVCP Engine Calibration," SAE Technical Paper 2009-01-0246, 2009, https://doi.org/10.4271/2009-01-0246.
Additional Details
Publisher
Published
Apr 20, 2009
Product Code
2009-01-0246
Content Type
Technical Paper
Language
English