Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1998-11-18
2000-03-14
Lopez, F. Daniel
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
13762523, F15B 910
Patent
active
060357606
ABSTRACT:
A power steering system with which no deterioration in steering feeling occurs when a control flow of working fluid changes. A valve mechanism V is made up of a power cylinder control valve CV for controlling a control flow Q and distributively supplying it to a power cylinder C and a bypass control valve BV connected in parallel with the cylinder control valve CV. The bypass control valve BV is normally closed, but while the control flow Q is increasing over a range of from a minimum flow Q.sub.1 to a maximum flow Q.sub.2 available for generating assist force the bypass control valve opens and returns a part of the control flow Q to a tank so that the pressure difference between the pressure chambers of the power cylinder C rises gently and the driver does not experience a disconcerting feeling such as one of the steering wheel suddenly being taken over.
REFERENCES:
patent: 4470432 (1984-09-01), Kervagoret
patent: 4570736 (1986-02-01), Waldorf
patent: 4594936 (1986-06-01), Bacardit
patent: 5092418 (1992-03-01), Suzuki et al.
patent: 5253729 (1993-10-01), Suzuki
Chiba Tatsuo
Hagidaira Shinichi
Nagasaka Ryouichi
Suzuki Katsuhiro
Takai Masashi
Kayaba Industry Co. Ltd.
Lopez F. Daniel
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