Underground Utility Equipment Line has Tier 4F Engine Technology
The new M-Series offering is equipped with a Cummins QSB4.5 119-kW engine and the L-Series with a Cummins QSB6.7 168-kW engine. The exhaust after-treatment system uses exhaust gas recirculation (EGR), selective catalytic reduction (SCR) and diesel oxidation catalyst (DOC) technology with diesel exhaust fluid (DEF urea). The new engine technology requires the use of ultra-low sulphur diesel (ULSD).
Tier 4F engines produce fewer emissions and provide better fuel economy than older generation engines, said Normet, noting that emissions from one Tier 3 machine equal those from 10 Tier 4F machines. Tier 4F engines also consume 8% less fuel than Tier 3 engines. All the new equipment will be fitted with an engine brake and lockable turbine as standard in a Dana 24000 transmission for the M-Series and a Dana 32000 transmission for the L-Series. The engine brake provides fully controlled operations in a decline tunnel, eliminating any need to apply the service brake. In inclined tunnels, the lockup turbine transfers the power from the engine to the wheels with the highest possible efficiency and offers 2 km/h higher speed.
The automatic gear selector uses three
gears for the MC, MF and LC Series, and four
gears for LF Series transportation vehicles
like Utimec, Multimec and Variomec concrete
transporters, dumpers and service vehicles.
The LF Series’ maximum speed is up
77% from 18 km/h for the older offering to
32 km/h for the new offering.