Knoxville Locomotive Works opts for Rolls-Royce T4 power
Written by David Briginshaw, Consulting Editor, International Railway JournalRolls-Royce has won a contract from Knoxville Locomotive Works (KLW), United States, to supply two types of EPA Tier-4-compliant MTU diesel engines to power switching locomotives.
Knoxville says it is the only freight diesel locomotive manufacturer to achieve Tier 4 switch and line-haul certifications with single-engine prime-movers rated at 783-2400kW.Diesel engines used by KLW comply with EPA Tier 3 emission regulations with no after treatment and require only minimal exhaust gas after treatment to comply with the EPA Tier 4 limits. As a result, KLW says the consumption of diesel exhaust fluid (DEF) for further nitrogen oxide reduction is correspondingly low, and the consumption for MTU’s series 4000 and 2000 engines is less than 2.5% per gallon of diesel fuel, whereas other engines require 6-8% in order to meet EPA Tier 4 levels.