New Doosan Tier 4 Wheel Excavators
Doosan added two new wheel models to its Tier 4 line up. The DX140W-5 and DX190W-5 models feature improved fuel efficiency from a new Smart Power Control (SPC) selectable engine mode and multiple product enhancements.
The 132 HP DX140W-5 and 168 HP DX190W-5 wheel excavators are popular applications where the machines typically drive on finished concrete or asphalt surfaces, often used in highwayand street development, building, manufacturing operations, site development and land improvement.
A new selectable feature, SPC engine mode, is standard, consisting of a Variable Speed Control and Pump Torque Control, working together to improve machine efficiency while maintaining productivity and reducing fuel consumption. The engine control unit automatically manages SPC when SPC is engaged. Each of the four power modes will function with SPC engaged or disengaged; however, SPC can be active only in the Digging work mode.
Variable Speed Control reduces engine rpm during low workload requirements such as during the swing portion of a dig cycle. This reduces the total energy required to perform a task and improves fuel efficiency by up to 3 to 7 percent.
- Pump Torque Control efficiently matches hydraulic pump torque and engine response to the task, preventing engine overload and excess fuel consumption, improving efficiency.
Other updates include:
- Ergonomic joystick: improves operator comfort and ease of use
- Relocated rear camera: enhances rear visibility
- Camera monitor: allows operators to monitor machine information while camera is on
- Floor pedal: adds optional way for operators to activate two-way auxiliary hydraulics
- Alternator upgrade: provides 80 amps for improved performance
- Emergency stop relocated: makes it easier for operators to reach on the seat base
Both models are fitted with Doosan DL06 diesel engines and aftertreatment technologies, and do not require a diesel particulate filter (DPF). The engines are optimized for use with a high-pressure common-rail fuel delivery system and a cooled exhaust gas recirculation (CEGR) system. They use a diesel oxidation catalyst (DOC) to reduce particulate matter and selective catalyst reduction (SCR) aftertreatment to reduce nitrogen oxides. Additionally, a variety of aftertreatment systems have been implemented as part of the Tier 4 compliance, such as diesel exhaust fluid, which is used with SCR technology.
Doosan excavators come with a standard three-year subscription to Doosan Telematics, which allows equipment owners and fleet managers to remotely monitor machine location, hours, fuel usage, engine idle versus work time and error codes, as well as engine and hydraulic temperatures.
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