Air-to-Fuel and Dual-Fuel Ratio Control of an Internal Combustion Engine

Event
SAE 2009 Powertrains Fuels and Lubricants Meeting
Authors Abstract
Content
Air-to-fuel (A/F) ratio is the mass ratio of the air-to-fuel mixture trapped inside a cylinder before combustion begins, and it affects engine emissions, fuel economy, and other performances. Using an A/F ratio and dual-fuel ratio control oriented engine model, a multi-input-multi-output (MIMO) sliding mode control scheme is used to simultaneously control the mass flow rate of both port fuel injection (PFI) and direct injection (DI) systems. The control target is to regulate the A/F ratio at a desired level (e.g., at stoichiometric) and fuel ratio (ratio of PFI fueling vs. total fueling) to any desired level between zero and one. A MIMO sliding mode controller was designed with guaranteed stability to drive the system A/F and fuel ratios to the desired target under various air flow disturbances. The performance of the sliding mode controller was compared with a baseline multi-loop PID (Proportional-Integral-Derivative) controller through simulations and showed improvements over the baseline controller. Finally, the engine model and proposed sliding mode controller are implemented into a Hardware-In-the-Loop (HIL) simulator and a target engine control module, and HIL simulation is conducted to validate the developed controller for potential implementation in an automotive engine.
Meta TagsDetails
DOI
https://doi.org/10.4271/2009-01-2749
Pages
9
Citation
Pace, S., and Zhu, G., "Air-to-Fuel and Dual-Fuel Ratio Control of an Internal Combustion Engine," SAE Int. J. Engines. 2(2):245-253, 2010, https://doi.org/10.4271/2009-01-2749.
Additional Details
Publisher
Published
Nov 2, 2009
Product Code
2009-01-2749
Content Type
Journal Article
Language
English