Boots – shoes – and leggings
Patent
1988-02-19
1990-10-30
Chin, Gary
Boots, shoes, and leggings
280707, B60G 1708
Patent
active
049673599
ABSTRACT:
A suspension control system for automotive vehicles automatically adjusts the damping strength of variable shock absorbers or other dampers in accordance with road surface conditions as recognized by frequency analysis of a vehicle height or vibration sensor signal. The sensor signal reflects vertical displacement of the vehicle body from the road surface and includes high-frequency components due solely to displacement of the wheels of unsprung mass relative to the road surface and low-frequency components due to displacement of the vehicle body or sprung mass. The sensor signal is filtered into these separate frequency bands, the amplitude of each of which is compared to a corresponding reference level. The results of comparison give an indication of the degree and scale of irregularities in the road surface; specifically, a high-amplitude low-frequency component indicates larger-scale bumps and dips capable of bouncing the vehicle whereas a strong high-frequency component reflects a rough-textured road surface, such as a gravel. The comparison information is sent to a suspension system controller which causes actuation of the shock abosrbers to a stiffer mode of operation when the low-frequency sensor signal components are relatively strong.
REFERENCES:
patent: 4600215 (1986-07-01), Kuroki et al.
patent: 4616848 (1986-10-01), Sugasawa et al.
patent: 4639014 (1987-01-01), Tanaka et al.
patent: 4674767 (1987-06-01), Kuroki et al.
patent: 4696489 (1987-09-01), Fujishiro et al.
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patent: 4741554 (1988-05-01), Okamoto
patent: 4770438 (1988-09-01), Sugasawa
Fujishiro Takashi
Ito Ken
Sugasawa Fukashi
Takahashi Tohru
Takakashi Sadahiro
Chin Gary
Nissan Motor Co,. Ltd.
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