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With four suction/exhaust valves, central combustion chamber and large turbocharger with intercooler, the engine delivers big power. What’s more, the HIOS hydraulic system, designed for optimal hydraulic energy control responding to engine speed, saves fuel consumption. The auto acceleration (A/A) mode can automatically control engine speed according to control lever stroke to reduce fuel consumption greatly in light-duty operations, such as grading and finishing. Furthermore, in the auto acceleration mode, the auto idle (A/I) decreases engine speed to save fuel consumption, when waiting a dump truck to arrive, with the control lever in neutral.