US5072392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suspension control system for automotive vehicle with feature of discrimination of vehicular driving condition on the basis of variation of lateral acceleration
Assignee: Hitachi Ltd
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Filing: 1989-12-19
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Granted: 1991-12-10
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Expires: 2009-12-19
Abstract
Abstract A suspension control system monitors a lateral acceleration exerted on a vehicular body. Based on the lateral acceleration, discrimination of mode of vibration of a vehicular body is performed by deriving variation rate of magnitude of lateral acceleration. The variation rate of lateral acceleration is then compared with a reference value so that suspension characteristics can be controlled on the basis of the variation rate of the lateral acceleration.
Inventors
- 👤 Minoru Taniguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:59
CPC Classifications
B; B60; B60G; B60G17/00; B60G17/015; B60G17/018; B60G2202/00; B60G2202/10; B60G2202/15; B60G2202/152; B60G2202/40; B60G2202/41; B60G2400/00; B60G2400/10; B60G2400/104; B60G2400/20; B60G2400/204; B60G2400/50; B60G2400/51; B60G2400/90; B60G2400/91; B60G2500/00; B60G2500/10; B60G2500/20; B60G2500/22; B60G2600/00; B60G2600/12; B60G2600/14; B60G2600/70; B60G2600/90; B60G2800/00; B60G2800/01; B60G2800/012
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
124 words
A suspension control system for an automotive vehicle comprising: means for adjusting suspension characteristics of a suspension system disposed between a vehicle body and a suspension member on which a vehicular wheel is supported; means for monitoring lateral acceleration exerted on the vehicular body and for producing a lateral acceleration indicative signal; means for deriving a variation rate of lateral acceleration on the basis of said lateral acceleration indicative signal; means for detecting a vibration mode of the vehicular body on the basis of the variation rate of lateral acceleration, for producing a suspension control signal representative of one of a plurality of suspension characteristics on the basis of the detected vibration mode of the vehicular body, for controlling said suspension characteristics adjusting means.
Claim 2
Dependent Claim
124 words
A suspension control system for an automotive vehicle comprising: means for adjusting suspension characteristics of a suspension system disposed between a vehicle body and a suspension member on which a vehicular wheel is supported; means for monitoring lateral acceleration exerted on the vehicular body and for producing a lateral acceleration indicative signal; means for deriving a variation rate of lateral acceleration on the basis of said lateral acceleration indicative signal; means for detecting a vibration mode of the vehicular body on the basis of the variation rate of lateral acceleration, for producing a suspension control signal representative of one of a plurality of suspension characteristics on the basis of the detected vibration mode of the vehicular body, for controlling said suspension characteristics adjusting means.
Claim 3
Dependent Claim
50 words
A suspension control system as set forth in claim 1, wherein said detecting means compares said variation rate of the lateral acceleration with a predetermined first threshold value representative of a criterion between vehicular bouncing and vehicular rolling for deriving suspension characteristics on the basis of the result of comparison.
Claim 4
Dependent Claim
53 words
A suspension control system as set forth in claim 2, wherein said detecting means further compares said variation rate of the lateral acceleration with a second threshold value representative of a criterion between vehicular rolling and steady traveling state so as to derive suspension characteristics on the basis of the result of comparison.
Claim 5
Dependent Claim
32 words
A suspension control system as set forth in claim 2, wherein said detecting means determines said control signal ordering a harder suspension characteristics when the vehicular vibration mode in rolling is detected.
Claim 6
Dependent Claim
62 words
A suspension control system as set forth in claim 2, wherein said variation rate deriving means derives a first variation rate over a first longer time interval and a second variation rate over a second shorter time interval, and said detecting means compares said first variation rate with said first threshold for discriminating vehicular vibration mode between bouncing mode and rolling mode.
Claim 7
Dependent Claim
41 words
A suspension control system as set forth in claim 5, wherein said detecting means compares said second variation rate with a second threshold defining a criterion between vehicular rolling mode and steady traveling state for discriminating rolling state and steady state.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-12-09 | 1995-06-10 | 1995-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-09 | 1999-06-10 | 1999-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-09 | 2003-06-10 | 2003-12-10 | $7700.00 | Window Closed / Lapsed |