eaton as well with regeneration http://www.mathershydraulics.com.au/static/gallery/products There was a aussie company , permo drive I have mentioned before as well from 10 years ago . Front page of the Australian back in 2008 with 30% fuel savings on bus and city trucks http://www.permo-drive.com/tech/index.htm Now these days it could be done with electric motor and capacitors like in cars I guess. /Hydraulic_Power_Regeneration_System_20121123013001.pdf Not sure permodrive is installed in anything ????
