Journal Article
Fuel Injector Optimization for Diesel Aftertreatment Systems Coupled with Exhaust Aftertreatment System Performance on a Heavy-Duty Diesel Engine Powered Vehicle
2010-10-05
2010-01-1940
Exhaust system fuel injection is required for many diesel engine aftertreatment systems including diesel particulate filter (DPF) systems, fuel reforming systems and lean NOx trap (LNT) systems. The design objective of this work was to develop exhaust system fuel injectors that promoted high aftertreatment conversion efficiencies with low fuel usage. A fuel injection system utilizing a pulse-width modulated (PWM) pressure swirl atomizer was first evaluated in a spray laboratory using drop size and spray patternation diagnostic equipment. The fuel system was later evaluated as part of an aftertreatment system consisting of fuel reformer, LNT, DPF and selective catalytic reduction (SCR) catalysts. Three system fuel injectors with high turndown ratios (16.5:1 to 25:1) were developed to provide fuel flow ranges of 10 to 250 grams per minute, 30 to 500 grams per minute and 50 to 1000 grams per minute.
