In the iterative race of power system in the field of construction machinery, Cummins QSB4.5 engine quietly rewrites the industry standard of power equipment in the 4-5 liter displacement segment with subversive technological innovation.This seemingly conventional medium-sized engine is leading the new direction of power system evolution with "subtractive design philosophy".
QSB4.5 adopts a modular integrated design and achieves a 23% increase in power density through the synergistic optimization of the high-pressure common rail fuel system and intelligent turbocharging technology while maintaining the standard 4.5L displacement.Its maximum output power breaks through 173kW, the torque reserve coefficient reaches 1.34, and the transient response speed shown in the hydraulic pump set matching test is 0.8 seconds shorter than that of similar products.This "small volume, big energy" feature enables the fuel efficiency of 20-ton excavators to rise to a new benchmark of 41.2g/kWh.
The value innovation of this engine is essentially a precise correction of the status quo of "excess performance" in the field of engineering power.It proves that under the background of dual-carbon strategy, the evolution direction of power equipment is not simple parameter stacking, but to realize the precise balance of performance, cost and environmental protection through systematic innovation.When the industry is still chasing for larger displacement and higher power, QSB4.5 has quietly completed the reconstruction of the value system of medium-sized power equipment, and this kind of "downsizing innovation" may trigger a paradigm shift in the development of power technology.
To learn more, please visit QSB4.5...