The X15 for Stage V applications will retain the same DPF-SCR aftertreatment system in order to provide ongoing installation continuity for OEMs in higher-output, more specialised machines.
The EGR-free X15 lowers heat rejection by over 40 percent compared with that of engines using cooled EGR. The X15 carries forward to Stage V certification with no modification required to the existing engine architecture – leading the way for other Stage V designs.
QSL9 (Tier 4 Final/Stage IV)
QSL9 engines are rated at 250-400 hp (186-298 kW) for Tier 4 Final. It has the same heat rejection as the Tier 4 Interim engines, so there is minimal, if any, impact on the cooling package. The QSL9 combines very high strength with a compact footprint, for one of the best power-to-weight ratios in its class.
This engine is used in every type of construction equipment, including excavators, cranes, wheel loaders, compactors, air compressors and material-handling equipment such as heavy forklifts and container-handling trucks. All of the performance upgrades from Tier 4 Interim have been incorporated into the Tier 4 Final engines, and we’re maximizing torque output, reaching 1200 lb-ft (1627 N•m) for the QSL9.