| 摘要 |
A regenerative power steering system 10 for a vehicle, alternatively operable in an unassisted, straight steering mode, a powered assist mode which provides a powered assist to entry of the vehicle into a turn and an energy regeneration mode which recovers energy while the vehicle exits a turn. The system comprises a motor pump 24 connected to a fluid delivery line 20 and a reservoir structure 76, in turn connected to a closed-center control valve assembly 38 for actuating a power cylinder 18 connected to the vehicle wheels. The pump 24 is connected to the delivery line 20 and the reservoir structure 76 by a four-way cross-over valve 30.
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