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QSG12 (Tier 4 Final/Stage IV)

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QSG12 (Tier 4 Final/Stage IV) Diesel Engines

The new QSG12 brings a major advantage for Tier 4 Final and Stage IV equipment installations by restoring the envelope size of the QSM11 predecessor, used for Tier 3 and Stage IIIA applications. Higher efficiency air handling and advanced combustion enable the QSG12 to return to the simplicity of a wastegated turbocharger and achieve near-zero emissions without the need for a cooled Exhaust Gas Recirculation (EGR) system. As a result, internal loads on the QSG12 are reduced to free up extra power potential, while heat rejection is lowered by over 40 percent compared with engines using cooled EGR.


Key Specifications
Certification Level Tier 4 Final / Stage IV
Power 335 - 512 hp / 250 - 382 kW
Torque 1700 lb-ft / 2305 N•m

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