The novel Common Pressure Rail Hybrid system applied to excavators, resulting in radical improvements in energy-efficiency, has received the Volvo Technology Award 2021.

Breaking new grounds for hydraulic efficiency in excavators, the Common Pressure Rail Hybrid system by Volvo Construction Equipment (Volvo CE), is yet another innovation improving performance while reducing CO2 emissions in line with Volvo Group’s net zero value ambitions by 2040.

Volvo Technology Award

The Volvo CE team from Sweden and South Korea has worked closely with Finnish company Norrhydro in the research project, leveraging an idea initially born out of academic collaborations. Today, the innovation has matured into a real-world solution with ongoing customer trials in the field and it is expected to accelerate the introduction of e-mobility across Volvo CE’s larger excavator platform.

The company anticipates the new technology to be available in the excavator market in a near future.

“This innovation enables Volvo CE to offer its customers a truly unique electro-hydraulic solution, pushing fuel efficiency to new levels. It’s demonstrating the passion of our engineers to bring forward customer-oriented solutions and systems that will drive the transformation towards net-zero emissions operations.”, says Lars Stenqvist, CTO Volvo Group.

How it works

The innovation enables new ways to reduce energy losses in hydraulics. In the new system architecture all the machine’s work functions are connected to a hydraulic energy storage via a common pressure rail, comprised by two or more pressure lines. The energy storage enables energy-efficient recovery of kinetic energy and peak power supply.

The system also allows energy recovery and performance increase of the machine’s rotating loads, such as the swing function through the introduction of variable hydraulic machines and thanks to greatly reduced energy losses and the power contribution from hydraulic accumulators, a smaller power source can be used and the need for cooling is reduced.

“We are really proud of this recognition, which we share with our collaboration partners. The potential in the innovation has been a strong driver for us in the project, making it an exciting journey to be part of, as we see the significant benefits it will offer for our customers and help build the world we want to live in.”, says Kim Heybroek, Volvo CE Emerging Technologies Research Engineer and a member of the winning team.

The winners of the Volvo Technology Award 2021 are: Kim Heybroek, Sangki Bae, Junwoo Kim, Byeongmo Ko, Donghun Oh, Wonkil Choe, Wontaek Oh and Namgyu Kim.

Read more about the partnership with Norrhydro here.

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