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1. 发明授权

US4627509A Power assistance steering systems for vehicles 失效
标题翻译：车辆动力辅助转向系统
公开(公告)号：US4627509A
公开(公告)日：1986-12-09
申请号：US727822
申请日：1985-04-26
申请人： Frederick J. Adams , Kenneth J. D. Heap
发明人： Frederick J. Adams , Kenneth J. D. Heap
IPC分类号： B62D5/07 , B62D5/06
CPC分类号： B62D5/06
摘要： A power assistance steering system 10 for a vehicle comprises steering gear 12 having an internal hydraulic ram supplied with hydraulic fluid by a pump 14 from a reservoir 16 via a solenoid valve 18 controlled by a micro-processor 20 which also controls an electric motor 22 for driving pump 14. Steering input torque is sensed by a torque sensor 36 and steering direction is sensed by a direction switch 34. Output signals from these devices are fed to micro-processor 20 which controls solenoid valve 18 and pump motor 22 accordingly, varying the motor speed in accordance with the pressure requirements of the steering ram as sensed by the torque sensor. In a further embodiment the pump is driven at a constant speed and a proportional control valve 74 is controlled by a micro-processor 78 to vary the fluid pressure supply.
摘要翻译：用于车辆的动力辅助转向系统10包括转向齿轮12，转向齿轮12具有由泵14从泵14经由电控阀18经由微处理器20控制的电磁阀18从储液器16供给液压流体的内部液压油缸，该控制器也控制电动机22，驱动泵14.由转矩传感器36检测转向输入转矩，并通过方向开关34检测转向方向。这些装置的输出信号被馈送到微处理器20，微处理器20相应地控制电磁阀18和泵马达22，电机转速根据扭矩传感器感应到的转向柱塞的压力要求而定。在另一实施例中，泵以恒定速度驱动，并且比例控制阀74由微处理器78控制以改变流体压力供应。

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