VTI National Transport Research Database

Energieffektiva mobila hydraulsystem (EMHY) (Energy efficient mobile fluid power systems (EMHY))

  • Volvo Construction Equipment AB, Svenskt företag eller organisation, 556021-9338
Sponsors, duration, budget: Energimyndigheten, Volvo Construction Equipment AB ; 2009-05-01 -- 2012-06-30 ; 5700000 kronorRegistration number:
  • Energimyndigheten 2009000907
Subject(s): Abstract: Målet i projektet är att reducera förlusterna i mobila hydraulsystem med 30 %, vilket i många entreprenadmaskiner motsvarar en bränslereduktion på runt 15 %. Det som möjliggör förbättringen är bl.a. nya ventiltekniker och styrstrategier. I projektet kombineras lösningarna med elektrisk samt hydraulisk energilagring och utvärderas även i ett flertal applikationer utöver arbetshydrauliken. Dessa innefattar parallell-hybridlösningar och drivlinor inkluderande framtida transmissionskoncept.Abstract: In this project the aim is to reduce the energy losses in mobile hydraulic systems by means of introducing new technology and more sophisticated control methods. It will involve recovery of the potential energy stored in elevated loads, reduction of throttling losses and recovery of braking energy. The primary application for this project is construction machinery, especially wheel loaders and excavators. In a wheel loader the hydraulics often stand for more than 50% of the total fuel consumption, with an average energy efficiency as low as about 40%. A specific aim is to reduce the fuel consumption of a wheel loader by 10-15% depending on the size of machine and driving cycle. The aim is also to distinguish whether recovered energy should be stored hydraulically or electrically in systems where both options are available. The result is also applicable to future transmission development in connection to hybrid technology.
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