PHF series Diesel Engine is a four-stroke direct-injection type high-speed diesel engine. Based on the former PHFZ4G series diesel engine, this series adopts new electronic unit pump technology and enables itself to meet the Stage-3 rd emission standard for NRMM diesel engine. Power HF makes a matching design considering the characteristics of construction machines. By making corresponding changes in some components and parts of the engine, it makes this series an ideal supporting power for small- and medium power construction machines in China. It is strongly universal with large inventory commercially available, rugged and durable, having plenty of accessories. Its reliability and service life have reached the advanced level among those of the like products in China and the top overhaul period is as long as 8000 hours.
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It adopts a new electronic unit pump fuel system with high injection pressure and precise control over fuel-injection quantity and injection timing. It has features of P-type injector without pressure chamber, complete combustion, enough power, low fuel consumption, low emission, intelligent control of electronic control system, warning of abnormity in water temperature, oil temperature and air inlet temperature and pressure, safer automatic alarm on potential failures, intelligent fault self-diagnosis and control, and protection strategies against abnormity in water temperature, oil temperature and air inlet temperature and pressure which protects the engine better.
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