Rock Products

OCT 2018

Rock Products is the aggregates industry's leading source for market analysis and technology solutions, delivering critical content focusing on aggregates-processing equipment; operational efficiencies; management best practices; comprehensive market

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www.rockproducts.com ROCK products • October 2018 • 25 The base machine for the EX1 is a Volvo EC750 model that has been upgraded to incorporate an electric motor in addi- tion to the diesel engine. "To fit the new components in the machine without increas- ing its size required a significant amount of repackaging work," Müller explained. "However, in terms of the operator interface and controls, nothing has changed – it's operated in exactly the same way as a conventional Volvo excavator. If the cable is connected, the machine will automatically start in electric mode. If it's not, it will start in diesel mode." "Because the machine will be relatively static – only moving a few meters once or twice a day as the excavator works its way through the blasted rock – it's ideally suited as a fully electric machine on a cable. This has allowed us to make it a zero-emission excavator when it's plugged into the grid. However, we've designed it with flexibility in mind, so that we have the option of using the diesel engine when it's needed, for example, to reposition the machine or quickly move it prior to blasting," he continued. Strong and Silent The piles of material on the site are organized by the LX1, Volvo CE's prototype electric hybrid wheel loader. The machine can deliver up to a 50 percent improvement in fuel efficiency, as well as significant reductions in emissions and noise pollution compared to its conventional counterparts. The LX1 is a "series hybrid" that incorporates a driveline that consists of electric drive motors mounted at the wheels, electric-driven hydraulics, an energy storage system, a signifi- cantly smaller diesel engine and new machine architecture, including a new design of the lifting unit. It is this combina- tion that enables the substantial gain in fuel efficiency. The prototype – which has 98 percent new parts and a fun- damentally new machine design – can do the work of a wheel loader that is one size larger. Milestone Inauguration Senior executives from Volvo CE and Skanska celebrated the start of the test period alongside other important dig - nitaries at an official inauguration ceremony. Among the attendees were Martin Lundstedt, president and CEO of the Volvo Group; Melker Jernberg, president of Volvo CE; Anders Overview of the Electric Site. Prototype LX1 electric hybrid wheel loader.

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