Browse Publications Technical Papers 2007-01-4197
2007-10-30

Electrically Powered Hydraulic Steering Systems for Light Commercial Vehicles 2007-01-4197

Electrically Powered Hydraulic Steering (EPHS) was developed in the early 90s and previously applied to vehicle segments B and C (small and medium-sized passenger cars). Till now more than 10 million vehicles are in the field. The advantages consist of the well known power density coming along with the flexible package. Value is added due to the consequent development and usage of electronic control realized in compact physical units. As a result key features for chassis control systems like controllability, high dynamic performance, and low energy consumption are achieved while maintaining mature and robust hydraulic components. Recent market requirements in other segments, e.g. Sport Utility Vehicles (SUV) and Light Commercial Vehicles (LCV) require higher powered motor pump units and lead to the decision to develop products in this direction. Increasing requirements for CO2 reduction and the development of Hybrid Electric Vehicles (HEV) push the usage of electro-hydraulic steering systems ahead. This paper grants an overview of the existing steering systems and shows the performance on a LCV.

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