US5131676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suspension control system with monitoring of inertia force with high precision
Assignee: Nissan Motor Co Ltd
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Filing: 1990-08-31
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Granted: 1992-07-21
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Expires: 2010-08-31
Abstract
Abstract A suspension control system employs an acceleration sensor for monitoring an inertial force affecting for vehicular attitude. A control system coacting therewith includes a mechanism for lowering the level of an output signal of the acceleration sensor to eliminate therefrom any error corresponding a resonance frequency of the acceleration sensor for obtaining higher accuracy inertially indicative data.
Inventors
- 👤 Katsuya Kii
- 👤 Yuji Okuyama
- 👤 Kazuo Mori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:15
CPC Classifications
B; B60; B60G; B60G17/00; B60G17/015; B60G17/016; B60G2400/00; B60G2400/10; B60G2400/104; B60G2400/106; B60G2400/20; B60G2400/206; B60G2400/60; B60G2400/90; B60G2400/91; B60G2500/00; B60G2500/10; B60G2500/20; B60G2500/30; B60G2600/00; B60G2600/12; B60G2600/22; B60G2600/24; B60G2600/26; B60G2600/70; B60G2600/90; B60G2800/00; B60G2800/01; B60G2800/012; B60G2800/014
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
156 words
A suspension control system for a automotive vehicle, comprising: a plurality of suspension systems, each respectively disposed between a vehicular body and a road wheel for damping a relative displacement between said vehicular body and each respective road wheel, said suspension system having variable suspension characteristics depending upon a respective suspension control command; a sensor means, having a known resonance frequency, for monitoring an inertial force causing a vehicular attitude change on the vehicular body, to provide a sensor signal representative of the monitored magnitude of the inertial force; first means for modifying a value of said sensor signal for eliminating an error component induced therein by said known resonance frequency of said sensor means, to provide a modified sensor signal excluding said error component; and second means for receiving said modified sensor signal from said first means for deriving a suspension control command on the basis of said sensor signal modified by said first means.
Claim 2
Dependent Claim
156 words
A suspension control system for a automotive vehicle, comprising: a plurality of suspension systems, each respectively disposed between a vehicular body and a road wheel for damping a relative displacement between said vehicular body and each respective road wheel, said suspension system having variable suspension characteristics depending upon a respective suspension control command; a sensor means, having a known resonance frequency, for monitoring an inertial force causing a vehicular attitude change on the vehicular body, to provide a sensor signal representative of the monitored magnitude of the inertial force; first means for modifying a value of said sensor signal for eliminating an error component induced therein by said known resonance frequency of said sensor means, to provide a modified sensor signal excluding said error component; and second means for receiving said modified sensor signal from said first means for deriving a suspension control command on the basis of said sensor signal modified by said first means.
Claim 3
Dependent Claim
22 words
A suspension control system as set forth in claim 1, wherein said sensor means monitors an acceleration experienced by the vehicular body.
Claim 4
Dependent Claim
39 words
A suspension control system as set forth in claim 2, wherein: said first means averages said sensor signals over a predetermined period related to said known resonance frequency of the sensor means for thereby deriving the modified sensor signal.
Claim 5
Dependent Claim
28 words
A suspension control system as set forth in claim 3, wherein: said averaging period substantially corresponds to one cycle of said known resonance frequency of the sensor means.
Claim 6
Dependent Claim
176 words
A suspension control system for an automotive vehicle, comprising: a plurality of suspension systems, each disposed between a vehicular body and road wheels thereof for damping a relative displacement between said vehicular body and each respective road wheel, said suspension systems having variable suspension characteristics depending upon a respective suspension control command; a sensor means, having a known resonance frequency, for monitoring an inertial force causing a vehicular attitude change on the vehicular body, to provide a sensor signal representative of the monitored magnitude of the inertial force, said sensor means being responsive to vibrations transmitted from a road surface corresponding to a resonance frequency of said sensor means to provide the sensor signal including a resonance frequency component; first means for averaging values of the sensor signal for a period of time substantially corresponding to at least one cycle of the resonance frequency to eliminate the resonance frequency component and providing a signal indicative of the averaged value; and second means responsive to the signal from said first means to provide said suspension control command.
Claim 7
Dependent Claim
176 words
A suspension control system for an automotive vehicle, comprising: a plurality of suspension systems, each disposed between a vehicular body and road wheels thereof for damping a relative displacement between said vehicular body and each respective road wheel, said suspension systems having variable suspension characteristics depending upon a respective suspension control command; a sensor means, having a known resonance frequency, for monitoring an inertial force causing a vehicular attitude change on the vehicular body, to provide a sensor signal representative of the monitored magnitude of the inertial force, said sensor means being responsive to vibrations transmitted from a road surface corresponding to a resonance frequency of said sensor means to provide the sensor signal including a resonance frequency component; first means for averaging values of the sensor signal for a period of time substantially corresponding to at least one cycle of the resonance frequency to eliminate the resonance frequency component and providing a signal indicative of the averaged value; and second means responsive to the signal from said first means to provide said suspension control command.
Claim 8
Dependent Claim
63 words
A system as set forth in claim 5, wherein: said known resonance frequency of the sensor means is substantially equal to 38 Hz and the sensor means monitors a lateral acceleration acting on the vehicle body, with said first means sampling values of the monitored lateral acceleration substantially every 2 msec. for 13 cycles to provide a corresponding averaged value of lateral acceleration.
Claim 9
Dependent Claim
47 words
A system as set forth in claim 5, wherein: said sensor means monitors a longitudinal acceleration acting on the vehicle body, said first means sampling values of the monitored longitudinal acceleration substantially every 5 msec. for 5 cycles to provide a corresponding averaged value of longitudinal acceleration.
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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) | 1995-07-21 | 1996-01-20 | 1996-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-21 | 2000-01-20 | 2000-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-21 | 2004-01-20 | 2004-07-21 | $7700.00 | Window Closed / Lapsed |