Diagnostics of Individual Air Fuel Ratio Cylinder Imbalance 2017-01-1684
Air Fuel Ratio (AFR) imbalance between engine cylinders remains one of the most challenging problems in powertrain systems diagnostics. California Air Resources Board(CARB) has started imposing specific requirements on automotive companies since 2011 that required the integration of on-board diagnostics (OBD) monitor for the detection and reporting of this type of powertrain malfunction. In this paper, some methodologies of AFR cylinder imbalance monitoring are investigated and a novel approach is proposed that shows reliable detection capability compared to the other methods. The proposed method requires certain conditions during deceleration fuel shutoff events to intrusively reactivate the cylinders and determine the imbalance condition. The method was evaluated on a V6 3.7L engine in an experimental Lincoln MKZ vehicle. Vehicle results are shown and discussed.
Citation: Jammoussi, H., Makki, I., Kluzner, M., and Jentz, R., "Diagnostics of Individual Air Fuel Ratio Cylinder Imbalance," SAE Int. J. Passeng. Cars – Electron. Electr. Syst. 10(2):400-404, 2017, https://doi.org/10.4271/2017-01-1684. Download Citation
Author(s):
Hassene Jammoussi, Imad Makki, Michael Kluzner, Robert Jentz
Affiliated:
Ford Motor Company
Pages: 5
Event:
WCX™ 17: SAE World Congress Experience
ISSN:
1946-4614
e-ISSN:
1946-4622
Also in:
SAE International Journal of Passenger Cars - Electronic and Electrical Systems-V126-7EJ, SAE International Journal of Passenger Cars - Electronic and Electrical Systems-V126-7
Related Topics:
Air / fuel ratio
Engine cylinders
Powertrains
On-board diagnostics (OBD)
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