Development of an Ultra-Safe, Ultra-Low Emissions Natural Gas Fueled School Bus: Final Report

This report documents Phase III - Integration and Phase - IV Demonstration and serves as the final report of this project. This report covers several significant areas of work. Integration of the engine technologies developed under Phase II into a production compressed natural gas engine is detailed, including information on the engine and control system modifications that were made. Ademonstration of the emissions performance and durability of the integrated vehicle was also conducted, and emissions performance was quantified through emissions test conducted while operating on a chassis dynamomoter. Federal Test Procedure emissions results verifying the ultra-low emissions output of this engine are also included.