Equipment World Digital Magazine
Issue link: http://read.dmtmag.com/i/946503
EquipmentWorld.com | February 2018 23 machine matters | continued The newest model of Case D Series excavators, the 245D minimum-swing model shares the Case Intelli- gent Hydraulic System with its other D Series siblings. A compact counterweight and modifi ed boom placement increase digging and lifting capacities while minimizing the machine's footprint. A Free Swing feature improves craning, laying or lifting of offset loads. IMUs are placed in strategic locations on equipment to detect movement. Information gathered is then used by the machine's master electronic control unit to manage machine operation. The name comes from Newton's fi rst law of motion, also known as the law of inertia: An object at rest tends to stay at rest and an object in mo- tion tends to stay in motion in a straight line and a constant speed unless acted upon by an external force. IMUs measure and report changes in inertia at specifi c points, typically the boom, stick, bucket and body on an excavator. Inertial measurement units (IMUs) The net effect is big gains in several categories: up to 45 per- cent increased efficiency, up to 25 percent reduced fuel con- sumption and up to 15 percent lower maintenance costs. Doosan Smart Power Control (SPC) is the feature cited by Aaron Kleingart- ner, marketing manager, Doosan Infracore North America. SPC was designed during the development of dash-5 Tier 4 Doosan excavators to reduce fuel consumption up to 7 percent. SPC monitors demand, and when demand is low, such as dur- ing the swing portion of a dig cycle, SPC lowers engine speed. SPC is the third iteration of tech- nology designed to reduce fuel con- sumption. Each refi nement builds on the previous program. The fi rst was introduced in Tier 3 machines, the second in Tier 4 Interim models, and now this third package comes on the current dash-5 models. Each of the four power modes will function with SPC on or off; SPC is active only in the digging work mode. Operators will likely just leave SPC on except during lifting. At those times, operators will want the greater precision and control afforded by the traditional means of running the engine at a constant speed while using the hydraulic system to modulate lifting performance. Gradall "Because they have fewer resourc- es, it takes longer for small-volume OEMs to design, develop and