Cummins Launches New 12 L Diesel At Bauma
On the opening day of bauma 2013, Cummins unveiled a new 12 L diesel designed for heavy-duty off-road applications such as wheel loaders, excavators, cranes, material handling equipment, road building equipment, compressors, screening and crushing machines. The new six-cylinder, 12 L displacement QSM12 diesel will be available in ratings from 335 hp to 512 hp (250 to 382 kW) and is purpose-designed to meet EPA Tier 4 final and EU Stage 4 near-zero emissions regulations, Cummins said, while offering a more compact envelope and over 30% higher power-to-weight ratio than the class average for engines with a similar power range.
Cummins said the new QSM12 maintains the envelope size of its QSM11 predecessor used for Tier 3 and Stage 3a applications. Higher efficiency air-handling and advanced combustion enable the engine to use a simpler wastegated turbocharger and eliminate the need for cooled exhaust gas recirculation (EGR). Cummins said that as a result, internal loads on the QSM12 are reduced to free up extra power potential, while heat rejection is lowered by over 40% compared with engines using cooled EGR.
With a sculptured block and composite material for the oil pan and valve cover, the QSM12 weighs 1900 lb (862 kg) to provide a top rating power-to-weight of 0.27 hp per lb. (0.44 kW per kg), while retaining the structural strength and durability required for heavy-duty engine, Cummins said.
“For Tier 4 Final, the QSM12 sets a new benchmark for heavy-duty engines with its ability to outperform any comparable engine, yet provides a smaller, lighter and simpler engine package to install,” said Hugh Foden, executive director – Cummins Off-Highway Business. “The new QSM12 provides an ideal opportunity for equipment manufacturers to downsize to a far more productive and economic 12 L engine, with all the heavy-duty durability and performance they need.”
The QSM12 also incorporates a fully integrated air intake to exhaust aftertreatment package designed and manufactured for the engine by Cummins Emission Solutions (CES). The aftertreatment combines a diesel particulate filter (DPF) with selective catalytic reduction (SCR).