Closed-Centre Hydraulic Power Steering by Direct Pressure Control
2014 (English)In: The 9th JFPS International Symposium on Fluid Power : Matsue 2014 : Oct. 28-31, 2014, The Japan Fluid Power System Society , 2014, 332-339 p.Conference paper (Other academic)
An ongoing trend in the vehicle industry is the development of steering related active safety functions for increased road safety. For this to be a reality there must exist a steering system that allows to either change the road wheel angle or torque by means of an external signal, called active steering. Due to heavy vehicles’ high axle load, hydraulic power is needed to assist the driver in turning the wheels. This paper looks into a solution where self-regulated pressure control valves are used for electronic control of the assistance pressure in order to realise active steering. The valve has closed-centre for a high potential to reduce the energy consumption. A model based approach is used to analyse the system. A non-linear simulation environment is developed to compare the closed-centre system with the original system. A linear analysis is also performed to discover the influence of valve properties on steering system performance. Results have shown that a feasible solution exists and that there exists a relation between valve dynamics, boost gain and steering system loop stability.
Place, publisher, year, edition, pages
The Japan Fluid Power System Society , 2014. 332-339 p.
Active steering, hydraulic power steering, pressure control, closed-centre system
IdentifiersURN: urn:nbn:se:liu:diva-112979ISBN: 4-931070-10-8OAI: oai:DiVA.org:liu-112979DiVA: diva2:776290
The 9th Symposium on Fluid Power, Energy Saving and LCA in Smart Fluid Power System, Matsue, Japan, 28-31 October 2014