Apparatus and method for controlling damping force characteristi

Details Apparatus and method for controlling damping force characteristi Apparatus and method for controlling damping force characteristi

1995-09-29

1998-09-15

Park, Collin W.

Boots, shoes, and leggings

280707, B60G 17015

Patent

active

058088903

ABSTRACT:
In apparatus and method for controlling a damping force characteristic for a vehicular suspension system, a relative velocity between a sprung mass and an unsprung mass is calculated using a predetermined transfer function from a sprung mass vertical velocity derived on the basis of a sprung mass acceleration signal. The predetermined transfer function is, in a embodiment, expressed as G.sub.U(S) =(QS.sup.2 +RS)/(FS.sup.2 +DS +E), wherein Q=-m.sub.1 .multidot.c.sub.2, R=-m.sub.1 .multidot.k.sub.2, F=c.sub.1 .multidot.c.sub.2, D=c.sub.1 .multidot.k.sub.2, E=k.sub.1 .multidot.k.sub.2, S denotes a Laplace operator, c.sub.1 denotes an attenuation constant of each shock absorber, c.sub.2 denotes an attenuation constant of the corresponding one of road wheels, k.sub.1 denotes a spring constant of the shock absorber. k.sub.2 denotes a spring constant of the corresponding one of the road wheels, m.sub.1 denotes the sprung mass, and m.sub.2 denotes the unsprung mass.

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