Suspension apparatus for a vehicle

Details Suspension apparatus for a vehicle Suspension apparatus for a vehicle

1993-01-22

1994-04-05

Chin, Gary

Boots, shoes, and leggings

280707, B60G 17015

Patent

active

053011112

ABSTRACT:
An improved support apparatus such as a suspension apparatus for a vehicle is disclosed which has excellent response characteristics, can save power consumption and has excellent vibration-isolating capacity for isolating the transmission of high-frequency vibrations from a support member such as a road wheel to an object such as the body of a vehicle. To these end, in one embodiment, a linear motor is disposed between the object and the support member for telescopically supporting the object under magnetic effects. A position sensor senses the position of the object relative to a reference position. A low-pass filter filters high-frequency components of the output signal of the position sensor above a prescribed upper frequency limit. Based on the output signals of the position sensor and the low-pass filter, the current supply to the linear motor is controlled in such a manner as to offset a change in the output signal of the low-pass filter. In another embodiment, an elastic member is further disposed between the object and the support member in parallel with the linear motor for elastically supporting the object on the support member. A high-pass filter filters low-frequency components of the output signal of the position sensor below a prescribed lower frequency limit. Based on the output signal of the high-pass filter, a correction is calculated for offsetting a change in the operating force of the elastic member. The current supply to the linear motor is controlled based on a change in the output signal of the low-pass filter and the correction thus calculated.

REFERENCES:
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patent: 4900054 (1990-02-01), Kessler
patent: 4934731 (1990-06-01), Hiwatashi et al.
patent: 4981309 (1991-01-01), Froeschle et al.
patent: 5028073 (1991-07-01), Harms et al.
patent: 5044455 (1991-09-01), Tecco et al.
patent: 5060959 (1991-10-01), Davis et al.
patent: 5071159 (1991-12-01), Kamimira et al.
patent: 5083275 (1992-01-01), Kawagoe et al.

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