Cummins said that Conexpo 2014 represents the biggest ever presence by the company at a construction equipment show, with over 29,828kW installed in more than 180 machines at the show. Its Tier 4 line-up on show extends from some of the smallest – the 55kW QSF2.8 installed in a carry crane from Manitex – up to the most powerful Tier 4i kit, that of a 738kW cold milling machine from Wirtgen which uses a twin-engine installation comprising QSL9 and QSX15 engines.
Its Tier 4 line-up on show extends from some of the smallest – the 55kW QSF2.8 installed in a carry crane from Manitex – up to the most powerful Tier 4i kit, that of a 738kW cold milling machine from
Conexpo revealed the first installed appearance of the latest QSG12 heavy-duty engine. Installed in a crawler crane, the Tier 4 Final compliant engine achieves a 380kW output.
Cummins’ QSG12 does not use cooled exhaust gas recirculation (EGR) to meet Tier 4 Final emissions, so its cooling requirements remain similar to those of a Tier 3 engine. The engine is also said to be 300-400kg lighter than other engines in its class from the use of composite materials and a sculpted block.
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