Big Diesels Prepare for Finals--EPA Tier 4 Final emissions standards won't apply to mining diesels until 2015, but engine builders aren't waiting until the 11th hour to offer models that can pass the test

摘要

The leading suppliers of large diesel engines for mining—Caterpillar, Cummins and MTU—are jockeying for market share in an industry that steadily demands more power. However, brute horsepower doesn't provide a total solution to rising customer expectations that also include better fuel economy, longer service life and simplified maintenance, to name just a few. Each vendor is picking its own path into the future, selecting the particular air management, combustion and exhaust control technologies they believe will satisfy both market and regulatory requirements.With an eye toward meeting these future propulsion needs, Cummins Inc. recently unveiled its latest solution for high-output diesel applications—an engine capable of producing more than 4,000 hp (2,983 kW) and staking claim as the world's most powerful high-speed diesel.