Sensor- Less Individual Cylinder Pressure Estimation and Closed Loop Control for Cold Start and Torque Balancing

Event
SAE 2010 World Congress & Exhibition
Authors Abstract
Content
The current paper presents a by cylinder IMEP estimator which operates completely free of direct cylinder pressure sensor measurement and which, when coupled with associated closed loop torque controller and commonly used engine control hardware, can provide significant improvement in the reduction to fuel sensitivity over conventional systems at minimal or no cost. Applications of the by cylinder estimator and closed loop torque/IMEP control are described including the use of the estimator during cold start before the O2 sensor is active. The application of the IMEP estimator and controller to cold start can provide significantly improved idle quality as well as enhanced robustness to degraded fuel quality. Closed loop combustion strategies using spark and fuel are described and experimental data from V6 engine testing are presented for the estimator and available closed loop controllers.
Meta TagsDetails
DOI
https://doi.org/10.4271/2010-01-1269
Pages
11
Citation
Rackmil, C., and McKay, D., "Sensor- Less Individual Cylinder Pressure Estimation and Closed Loop Control for Cold Start and Torque Balancing," Engines 3(1):1042-1052, 2010, https://doi.org/10.4271/2010-01-1269.
Additional Details
Publisher
Published
Apr 12, 2010
Product Code
2010-01-1269
Content Type
Journal Article
Language
English