Heavyweight Bulldozer Models Feature Refined Design, High Fuel Efficiency

摘要

Caterpillar has upgraded its popular Dll bulldozer models, first introduced in 1986. The new DHT and D11T CD versions offer design refinements that include Enhanced Auto Shift, Dynamic Inclination Monitor, automatic climate control and available automated ripper control. The D11T and D11T CD's 850-net-hp (634-kW) C32 engine, according to Cat, allows the machines to work fuel-efficiently anywhere in the world, with blades ranging in capacity up to 57 yd~3 (43.6 m~3) and operating weights up to 248,456 lb (112 698 kg). The engine is configured to meet U.S. EPA Tier 4 Final emissions standards for those geographical areas requiring a high degree of emissions control; for less-regulated areas, it will be configured to meet U.S. EPA Tier 2 equivalent emissions standards.