Demonstration of Caterpillar C-10 Dual-Fuel Engines in MCI 102DL3 Commuter Buses

NREL, Paul Norton (NREL Technical Monitor)

Research output: NRELSubcontract Report


The purpose of this program was to demonstrate the Caterpillar C-10 Dual-Fuel Natural Gas (DFNG) engine in an over-the-road bus application. Three new Motor Coach Industries (MCI) 102DL3 buses, equipped with Caterpillar C-10 DFNG engines, and one bus, equipped with a Caterpillar C-10 diesel engine, were operated side by side on similar fixed-route revenue service for a 12-month demonstrationperiod (February 1998 to January 1999). The buses were used as part of the Clean Air Express Commuter Bus Program in Santa Barbara County, California. The performance and reliability of the DFNG engines were similar to that of the diesel engine, but the emissions results were mixed.
Original languageAmerican English
Number of pages53
StatePublished - 2000

Bibliographical note

Work performed by California Energy Commission, Sacramento, California and Santa Barbara County Air Pollution Control District, Goleta, California

NREL Publication Number

  • NREL/SR-540-26758


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