Komatsu’s Hybrid Excavator

Komatsu's new 36-ton hybrid excavator.

Komatsu America Corp. introduced the new HB365LC-3 hybrid excavator at ConExpo-Con/AGG.

The 36-ton excavator incorporates improved hybrid and total-vehicle-control systems, to help reduce fuel consumption by up to 20% depending on the application, while maintaining or exceeding operating performance, compared to 36-ton, non-hybrid excavators, Komatsu said.

“The new 36-ton-class HB365LC-3 excavator is built for power and production first, with the considerable fuel savings an added benefit,” said Kurt Moncini, Komatsu America senior product manager. “We applied everything we learned when we debuted the HB215LC-1, the world’s first fully-electric hybrid excavator in 2011. Now, we have the perfect balance of performance and fuel efficiency.”

Komatsu’s fully-electric hybrid system uses an electric swing motor, which captures swing deceleration energy that would normally go unused, and makes it available to do work. The energy captured during each swing cycle is stored in an ultra capacitor, which provides energy for the swing system.  The diesel engine also has a motor/generator for fast charging the capacitor when required, and to rapidly increase engine RPM from an ultra-low idle, for quick hydraulic response when boom, arm and bucket controls are activated, the company said.

What makes the Komatsu system unique is the 100% electric swing system. The hydraulic power normally needed by the swing system is now completely available for boom, arm and bucket power, helping to improve digging cycle time and production, the company said.

To meet EPA Tier 4 final-certified requirements, the 8.85 L Komatsu SAA6D114E-6, 269 hp engine combines a Komatsu Diesel Particulate Filter (KDPF) and selective catalyst reduction (SCR) system with diesel exhaust fluid (DEF).