Thanks to a clever, fully electric swing system and “boom up” power assist features, the big PC365-11 hybrid excavator from Komatsu promises better performance and serious fuel savings compared to conventional diesel machines.
Komatsu says its PC365-11 hybrid excavator uses a “boom-up” power assist feature that captures and stores kinetic energy during different operation cycles, then taps into that power to provide an extra energy boost when needed. The result is 15% more productivity and a 20% improvement in fuel efficiency when compared to non-hybrid excavators in ~40 ton class.
“The PC365LC-11 was engineered for excellence in multifunction applications by leveraging its innovative electric powertrain system to boost job site productivity while reducing fuel consumption,” says Matthew Moen, Komatsu’s product manager. “To highlight these performance enhancements, we’re emphasizing the concept of ‘multifunction plus’ as the defining feature of this machine.”
How it works
Komatsu’s hybrid system replaces the conventional hydraulic swing function with a fully electric swing motor that draws power from an ultracapacitor (as opposed to a battery) energy storage unit. As excavator slows or stops swinging, something like a regenerative braking system captures the kinetic energy that would normally be lost as heat and stores it in the capacitor. Once there, the stored energy can be quickly released to power the swing motor or assist the engine, delivering up to an extra 70 hp when needed to support heavy lifting or digging cycles.
And, thanks to Komatsu’s proprietary software, all of this energy capture and reuse happens automagically during normal work, without the need for external charging. The fuel savings happen because removing the hydraulic load from the ICE engine allows it to run at an ultra-low idle, while the productivity comes from the greater power and overall speed of the electric operations vs. conventional hydraulics.
Electrek’s Take
Trust me when I tell you that Komatsu didn’t wake up one day and decide to build a capacitor-based hybrid crane. One of their customers had the idea and came to them, promising orders. That’s what Komatsu does – from undersea remote control dozers to lunar mining rigs (above), if you bring Komatsu an order, they will absolutely find a way to fill it.
As for PC365-11 hybrid excavator, it’s packed with clever tech, overall – offering significant fuel, emissions, and TCO reductions without dramatically changing the operational logistics of an existing fleet’s operations. That’s all the sales pitch it needs.
SOURCE: Komatsu, via Equipment World.
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