Development of Baseline and Controlled Exhaust Emission Rates for Off-HighwayVehicle Engines

摘要

The objective of this project was to develop baseline exhaust emission rates forCalifornia off-highway vehicle engines in order to provide reliable data for the development of exhaust emission standards and regulations for the off-highway vehicle category. Ten off-highway vehicle category engines were tested to determine baseline emissions. Various emission reduction strategies applicable to the category were evaluated. Evaluation of emission reduction strategies applicable to spark-ignited engines included alternate fuels, exhaust gas recirculation (EGR), oxidation catalyst, and three-way catalyst, in conjunction with closed-loop control. Diesel engine emission reduction strategies included retarded injection timing and turbo-charging.