Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Electro-hydraulic power steering question

Peter7307 · 09-05-2009, 05:17 AM

Not sure about the later Astra models but the '97 version has "on demand" power for the steering controlled from a torsion bar within the steering valve ass'y and regulated by electronic parameters.

Electric / hydraulic systems use around 20% of the power needed for a full (engine driven pump type) hydraulic systems.
Makers tend to keep the details a closely kept secret but the real world cost for a full hydraulic power steering is about 0.5 l/100 klm.according to ZF who are main players in that area.

Full electric systems (Opel Corsa etc) is around 105A at 12V at maximum demand.
Packaging and costs are the other attractions for full electric systems,

Pete.

09-05-2009, 05:17 AM	#7 (permalink)
Peter7307 Master EcoModder Join Date: Jan 2008 Location: Victoria , Australia. Posts: 499 Thanks: 20 Thanked 46 Times in 33 Posts	Not sure about the later Astra models but the '97 version has "on demand" power for the steering controlled from a torsion bar within the steering valve ass'y and regulated by electronic parameters. Electric / hydraulic systems use around 20% of the power needed for a full (engine driven pump type) hydraulic systems. Makers tend to keep the details a closely kept secret but the real world cost for a full hydraulic power steering is about 0.5 l/100 klm.according to ZF who are main players in that area. Full electric systems (Opel Corsa etc) is around 105A at 12V at maximum demand. Packaging and costs are the other attractions for full electric systems, Pete.