Elements of a Proper Retrofit Control Program Size –Properly Sized Control Technologies Ensure Low Backpressure and Maximum Performance Vehicle Integration –An Important Aspect of Control Technology Retrofit, but Has Been Successfully Accomplished on Both On- and Off-Road Vehicles (muffler replacement or in-line installation) Fuel Quality –For PM Control, <10 ppm Allows for Maximum Emission Control Performance and Best Filter Regeneration Characteristics –Oxidation Catalysts Can Be Formulated to Minimize Sulfation, but at the Expense of Some Reduced Emission Control Performance –Some Technologies Can Be Applied to Certain Applications Using Fuels with Higher Sulfur Levels
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