Engine calibrations are inexpensive methods for reducing exhaust emissions since only software modifications are required. The California Air Resources Board staff conducted a test program to investigate the effectiveness of engine calibration techniques to reduce the newly regulated aggressive driving exhaust emissions or 'off-cycle' emissions. Consisting of stoichiometric and rich 'bias' calibration, these engine calibration techniques were applied to fourteen late-model vehicles. The engine calibration techniques reduced the off-cycle emissions substantially on most vehicles. To comply with the proposed off-cycle standards for California low-emission vehicles and ultra-low-emission vehicles, these techniques will be a cost-effective method to reduce off-cycle emissions.
Effectiveness of engine calibration techniques to reduce off-cycle emissions
Wirksamkeit von Motorkalibrierungsverfahren für die Minderung der Fahr-Abgasemissionen
1997
9 Seiten, 5 Bilder, 6 Tabellen, 4 Quellen
Conference paper
English
Effectiveness of Engine Calibration Techniques to Reduce Off-Cycle Emissions
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