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| DX350LC excavator is more than just interim Tier 4 compliant  The Doosan DX350LC excavator is more than just interim Tier 4 (iT4) compliant. Improvements span from more engine horsepower and torque to a turbocharger, upgraded cooling system and new hydraulic system. The DX350LC is powered by a 281-horsepower, 6-cylinder DL08K water-cooled diesel engine that has been optimized for use with cooled exhaust gas recirculation (CEGR) system, diesel oxidation catalyst (DOC) and diesel particulate filter (DPF). The engines in this configuration are optimized to reduce nitrogen oxides and after treatment is needed to reduce particulate matter, to comply with iT4 emission regulations. The turbocharged 466-cubic-inch engine features a common rail design with direct fuel injection, electronic control and four valves per cylinder.The high-pressure common-rail (HPCR) system increases the efficiency of fuel delivery by increasing the pressure to 26,100 psi. The increased pressure allows the injector to inject a finer mist into the engine, which results in a more efficient combustion as required by the lower combustion chamber temperature due to the CEGR system. Cooling system upgrades include two variable-speed hydraulic fans. This allows the engine and oil cooling systems to be controlled independently, improving fuel efficiency and provides a quieter operator environment. The new cooling system on average has a 10 - 15 percent greater cooling capacity. write your comments about the article :: © 2012 Construction News :: home page |