Australia’s first low-emission mining truck commissioned by Komatsu

Komatsu has commissioned the first Tier 4 Final version of its 930E-5 ultra-class mining truck in Australia

In an Australian first, Komatsu has commissioned the first Tier 4 Final version of its 930E-5 ultra-class mining truck in Australia as part of its commitment to designing and manufacturing mining equipment that advances its corporate social responsibility aims while embracing UN Sustainable Development Goals.

This latest factory-designed emission control technology solution, which meets the most stringent North American and EU emissions regulations, has been adopted by Komatsu Australia to meet a client’s specific operational needs.

"Komatsu has a strong commitment to environmental best practice, with a continuous focus on reducing our environmental impacts and our carbon footprint," says Jason Arthur, Komatsu’s national product manager—mining.

Komatsu’s Tier 4 Final compliant 930E-5 incorporates on-board after-treatment system that significantly reduces the Scope 1 emissions produced during the haulage process at mines.

"To achieve this, Komatsu worked with our large horsepower engine partner Cummins to provide a simple, low maintenance solution to meet Tier 4 Final emissions requirements," says Jason.

The Komatsu 930E-5 (cap <300 metric tonnes) is powered by a high-performance Cummins QSK60 dual-stage turbocharged engine rated at 2700hp via a fully solid state AC electric drive system
The Komatsu 930E-5 

The Cummins-sourced engine treats particulate matter in the engine cylinders through an advanced high-pressure fuel injection control system to reduce PM 2.5 by 80% (compared with Tier 2 engine levels).

In turn, the nitrogen oxide (NOx) greenhouse gas emissions are treated out of cylinder through a selective catalytic reduction (SCR) after-treatment process.

This modular SCR system consists of an airless diesel exhaust fluid (DEF) dosing system and features an integrated decomposition chamber with a maintenance strategy that aligns with the life of the engine. These SCR units are contained within the truck’s rear-exiting exhaust system.

Komatsu’s use of the flow-through exhaust after-treatment​​ system delivers ultra-low emissions while increasing fuel efficiency without increasing backpressure.

In addition to meeting the technology challenges in developing a Tier 4 Final compliant version of the 930E-5, the customer also requested Komatsu to provide a truck with significantly lower noise emission levels.

"These factory-designed sound treatments more than halved the standard truck’s emitted sound power levels, resulting in a target sound power level of less than 113dBA," says Jason.

"Successfully achieving these sound levels was a challenging undertaking for a large mining truck powered by an engine with an output of 2700hp (2014kW)."

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