Electricity: motive power systems – Limitation of motor load – current – torque or force
Patent
1995-05-18
1996-05-14
Ip, Paul
Electricity: motive power systems
Limitation of motor load, current, torque or force
318430, 318473, 180132, 180 791, 180142, 180143, B62D 5083
Patent
active
055170960
ABSTRACT:
A power steering system includes a housing and a first member supported by the housing for movement relative to the housing. A second member is supported by the housing for movement relative to the housing and the first member. Steerable vehicle wheels are moved in response to relative movement between the first and second members. A power steering resistance control system resists relative movement between the first and second members with a force which varies as a function of variations in vehicle speed. Material is located in a chamber circumscribing the first member. The material has a viscosity which varies as a function of the magnitude of an energy field acting thereon to vary the resistance to relative movement between the first and second members. The energy field is applied to act on the material with a magnitude that varies as a function of the vehicle speed.
REFERENCES:
patent: 4034825 (1977-07-01), Adams
patent: 4759420 (1988-07-01), Schipper, Jr. et al.
patent: 4765427 (1988-08-01), Yonker
patent: 5086862 (1992-02-01), Graber et al.
SAE Technical Paper Series, 940867, International Congress & Exposition, Detroit, Michigan Feb. 28-Mar. 3, 1994, "Magnetic Power Steering Assist System-MAGNASTEER", (pp. 57-62) A. Pawlak, D. Graber, D. Eckhardt.
Colletti John B.
Shtarkman Emil M.
Ip Paul
TRW Inc.
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