US5142476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suspension system for a vehicle
Assignee: Mazda Motor Corp
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Filing: 1990-05-14
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Granted: 1992-08-25
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Expires: 2010-05-14
Abstract
Abstract A suspension system for a vehicle has cylinder devices in which suspension characteristics are changed by controlling fluid supply/discharge to/from the cylinder devices. The fluid pressure in the cylinder devices is sensed, and warping of the vehicle body is computed based on the sensed pressures. Then the fluid supply/discharge to/from the cylinder devices is controlled so as to suppress the warping of the vehicle body by a warp control unit. The warp control unit is provided so as to change the ratio of the fluid supply/discharge to/from the cylinder devices of the front wheels to the fluid supply/discharge to/from the cylinder devices of the rear wheels.
Inventors
- 👤 Mineharu Shibata
- 👤 Shin Tkkehara
- 👤 Toshiki Morita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:15
CPC Classifications
B; B60; B60G; B60G17/00; B60G17/015; B60G17/016; B60G17/0162; B60G2202/00; B60G2202/10; B60G2202/15; B60G2202/154; B60G2400/00; B60G2400/10; B60G2400/102; B60G2400/104; B60G2400/20; B60G2400/204; B60G2400/25; B60G2400/252; B60G2400/30; B60G2400/50; B60G2600/00; B60G2600/14; B60G2600/22; B60G2600/26; B60G2800/00; B60G2800/01; B60G2800/012; B60G2800/014
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
139 words
A suspension system for a vehicle, comprising a plurality of cylinder devices each provided between a vehicle body member and a vehicle wheel member for the vehicle body, in which suspension characteristics are changed by controlling fluid supply to and discharge from said cylinder devices, pressure sensor means for sensing fluid pressure in said cylinder devices, and warp control means for computing warping of said vehicle based on fluid pressure signals from said pressure sensor means and controlling the fluid supply/discharge to/from said cylinder devices so as to suppress said warping of the vehicle, said warp control means being provided so as to change a ratio of the fluid supply to or discharge from the cylinder devices of front wheels to the fluid supply to or discharge from the cylinder devices of rear wheels based on the computed warping.
Claim 2
Dependent Claim
139 words
A suspension system for a vehicle, comprising a plurality of cylinder devices each provided between a vehicle body member and a vehicle wheel member for the vehicle body, in which suspension characteristics are changed by controlling fluid supply to and discharge from said cylinder devices, pressure sensor means for sensing fluid pressure in said cylinder devices, and warp control means for computing warping of said vehicle based on fluid pressure signals from said pressure sensor means and controlling the fluid supply/discharge to/from said cylinder devices so as to suppress said warping of the vehicle, said warp control means being provided so as to change a ratio of the fluid supply to or discharge from the cylinder devices of front wheels to the fluid supply to or discharge from the cylinder devices of rear wheels based on the computed warping.
Claim 3
Dependent Claim
45 words
The suspension system according to claim 1 wherein said warp control means controls the fluid supply to and discharge from the cylinder devices of the front wheels to be less than the fluid supply to and discharge from the cylinder devices of the rear wheels.
Claim 4
Dependent Claim
26 words
The suspension system according to claim 1 wherein said warp control means changes said ratio so as to be decreased according to increase in lateral acceleration.
Claim 5
Dependent Claim
24 words
The suspension system according to claim 1 wherein said warp control means changes said ratio accroding to weight balance of the vehicle body member.
Claim 6
Dependent Claim
46 words
The suspension system accroding to claim 1 wherein under normal conditions said warp control means changes said ratio according to the weight balance of the vehicle body member, and further changes said ratio so as to be decreased accroding to the increase in the lateral 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) | 1995-08-25 | 1996-02-24 | 1996-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-25 | 2000-02-24 | 2000-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-25 | 2004-02-24 | 2004-08-25 | $7700.00 | Window Closed / Lapsed |