Automotive diesel fuel emissions durability trends

Regional mandates for reduced exhaust emissions, sustainable over the useful lives of vehicles or equipment, are influencing diesel fuel compositions and engine designs. Laboratory and real-world examples are provided to illustrate that both fuel composition and engine design can impact injector deposit formation and injector spray-hole corrosion rates, with associated potentials for deterioration of emissions compliance. Potential impacts of poor lubricity fuels are also discussed. A field test in California of a deposit control additive in trucks with Cummins L10 engines is detailed, including measurements of transient cycle emissions performance using conventional and reformulated fuels.