US5088759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle suspension system
Assignee: Mazda Motor Corp
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Filing: 1990-05-14
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Granted: 1992-02-18
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Expires: 2010-05-14
Abstract
Abstract A vehicle suspension system of the disclosure is provided with a cylinder device between a vehicle body member and a vehicle wheel member for the vehicle body member by which suspension characteristics are changed. The suspension characteristics are changed by controlling hydraulic fluid supply for the cylinder device, a vehicle height detecting device for detecting a vehicle height displacement, a vehicle height change rate detecting device for detecting a change rate of the vehicle height displacement, and a control device for receiving signals from both the vehicle height displacement detecting device and the vehicle height change rate detecting device to control the hydraulic fluid supply for the cylinder device. This hydraulic fluid supply is controlled in accordance with a vehicle height change rate gain in a manner that the change rate of the vehicle height displacement is suppressed a gain change device is also provided for changing the vehicle height change rate gain in accordance with a predetermined condition so as to change the control of the hydraulic fluid for the cylinder device. A desirable vehicle height displacement control can therefore, be accomplished.
Inventors
- 👤 Shin Takehara
- 👤 Toshiki Morita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:19
CPC Classifications
B; B60; B60G; B60G17/00; B60G17/015; B60G17/016; B60G2202/00; B60G2202/10; B60G2202/15; B60G2202/154; B60G2204/00; B60G2204/80; B60G2400/00; B60G2400/10; B60G2400/102; B60G2400/20; B60G2400/204; B60G2400/25; B60G2400/252; B60G2400/40; B60G2400/41; B60G2400/50; B60G2400/51; B60G2400/512; B60G2400/5122; B60G2500/00; B60G2500/30; B60G2600/00; B60G2600/12; B60G2600/14; B60G2800/00; B60G2800/01; B60G2800/012; B60G2800/014; Y; Y10; Y10S; Y10S280/00; Y10S280/01
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
183 words
A vehicle suspension system comprising: a cylinder device provided between a vehicle body member and a vehicle wheel member for the vehicle body member in which suspension characteristics are changed by controlling hydraulic fluid supplied to the cylinder device, vehicle height detecting means for detecting a vehicle height displacement, vehicle height change rate detecting means for detecting a rate at which the vehicle height displacement changes, and control means for receiving signals from both the vehicle height detecting means and the vehicle height change rate detecting means to determine vehicle height change rate gain coefficients and control the hydraulic fluid supplied tot he cylinder device in accordance with said vehicle height change rate gain coefficients so that the rate at which the vehicle height displacement is changed is suppressed, said control means changing the vehicle height change rate gain coefficients in accordance with a vehicle operating condition so as to change the control of the hydraulic fluid supplied to the cylinder device by increasing at least one of said vehicle height change rate gain coefficients when the vehicle is stopped and starts running.
Claim 2
Dependent Claim
183 words
A vehicle suspension system comprising: a cylinder device provided between a vehicle body member and a vehicle wheel member for the vehicle body member in which suspension characteristics are changed by controlling hydraulic fluid supplied to the cylinder device, vehicle height detecting means for detecting a vehicle height displacement, vehicle height change rate detecting means for detecting a rate at which the vehicle height displacement changes, and control means for receiving signals from both the vehicle height detecting means and the vehicle height change rate detecting means to determine vehicle height change rate gain coefficients and control the hydraulic fluid supplied tot he cylinder device in accordance with said vehicle height change rate gain coefficients so that the rate at which the vehicle height displacement is changed is suppressed, said control means changing the vehicle height change rate gain coefficients in accordance with a vehicle operating condition so as to change the control of the hydraulic fluid supplied to the cylinder device by increasing at least one of said vehicle height change rate gain coefficients when the vehicle is stopped and starts running.
Claim 3
Dependent Claim
24 words
A vehicle suspension system according to claim 1, wherein said control means changes a pitch component of the vehicle height change rate gain coefficients.
Claim 4
Dependent Claim
183 words
A vehicle suspension system comprising: a cylinder device provided between a vehicle body member and a vehicle wheel member for the vehicle body member in which suspension characteristics are changed by controlling hydraulic fluid supplied to the cylinder device, vehicle height detecting means for detecting a vehicle height displacement, vehicle height change rate detecting means for detecting a rate at which the vehicle height displacement changes, and control means for receiving signals from both the vehicle height detecting means and the vehicle height change rate detecting means to determine vehicle height change rate gain coefficients and control the hydraulic fluid supplied to the cylinder device in accordance with said vehicle height change rate gain coefficients so that the rate at which the vehicle height displacement is changed is suppressed, said control means changing the vehicle height change rate gain coefficients in accordance with a vehicle operating condition so as to change the control of the hydraulic fluid supplied to the cylinder device by increasing at least one of said vehicle height change rate gain coefficients when the vehicle is in a braking condition.
Claim 5
Dependent Claim
183 words
A vehicle suspension system comprising: a cylinder device provided between a vehicle body member and a vehicle wheel member for the vehicle body member in which suspension characteristics are changed by controlling hydraulic fluid supplied to the cylinder device, vehicle height detecting means for detecting a vehicle height displacement, vehicle height change rate detecting means for detecting a rate at which the vehicle height displacement changes, and control means for receiving signals from both the vehicle height detecting means and the vehicle height change rate detecting means to determine vehicle height change rate gain coefficients and control the hydraulic fluid supplied to the cylinder device in accordance with said vehicle height change rate gain coefficients so that the rate at which the vehicle height displacement is changed is suppressed, said control means changing the vehicle height change rate gain coefficients in accordance with a vehicle operating condition so as to change the control of the hydraulic fluid supplied to the cylinder device by increasing at least one of said vehicle height change rate gain coefficients when the vehicle is in a braking condition.
Claim 6
Dependent Claim
24 words
A vehicle suspension system according to claim 3, wherein said control means changes a pitch component of the vehicle height change rate gain coefficients.
Claim 7
Dependent Claim
184 words
A vehicle suspension system comprising: a cylinder device provided between a vehicle body member and a vehicle wheel member for the vehicle body member in which suspension characteristics are changed by controlling hydraulic fluid supplied to the cylinder device, vehicle height detecting means for detecting a vehicle height displacement, vehicle height change rate detecting means for detecting a rate at which the vehicle height displacement changes, and control means for receiving signals from both the vehicle height detecting means and the vehicle height change rate detecting means to determine vehicle height change rate gain coefficients and control the hydraulic fluid supplied to the cylinder device in accordance with said vehicle height change rate gain coefficients so that the rate at which the vehicle height displacement is changed is suppressed, said control means changing the vehicle height change rate gain coefficients in accordance with a vehicle operating condition so as to change the control of the hydraulic fluid supplied to the cylinder device by increasing at least one of said vehicle height change rate gain coefficients when the vehicle is in a lateral acceleration condition.
Claim 8
Dependent Claim
184 words
A vehicle suspension system comprising: a cylinder device provided between a vehicle body member and a vehicle wheel member for the vehicle body member in which suspension characteristics are changed by controlling hydraulic fluid supplied to the cylinder device, vehicle height detecting means for detecting a vehicle height displacement, vehicle height change rate detecting means for detecting a rate at which the vehicle height displacement changes, and control means for receiving signals from both the vehicle height detecting means and the vehicle height change rate detecting means to determine vehicle height change rate gain coefficients and control the hydraulic fluid supplied to the cylinder device in accordance with said vehicle height change rate gain coefficients so that the rate at which the vehicle height displacement is changed is suppressed, said control means changing the vehicle height change rate gain coefficients in accordance with a vehicle operating condition so as to change the control of the hydraulic fluid supplied to the cylinder device by increasing at least one of said vehicle height change rate gain coefficients when the vehicle is in a lateral acceleration condition.
Claim 9
Dependent Claim
24 words
A vehicle suspension system according to claim 5, wherein said control means changes a roll component of the vehicle height change rate gain coefficients.
Claim 10
Dependent Claim
231 words
A vehicle suspension system comprising: a cylinder device provided between a vehicle body member and a vehicle wheel member for the vehicle body member in which suspension characteristics are changed by controlling hydraulic fluid supplied to the cylinder device, vehicle height detecting means for detecting a vehicle height displacement, vehicle height change rate detecting means for detecting a rate at which the vehicle height displacement changes, and control means for receiving signals from both the vehicle height detecting means and the vehicle height change rate detecting means to determine vehicle height change rate gain coefficients and control the hydraulic fluid supplied to the cylinder device in accordance with said vehicle height change rate gain coefficients so that the rate at which the vehicle height displacement is changed is suppressed, said control means changing the vehicle height change rate gain coefficients in accordance with a vehicle operating condition so as to change the control of the hydraulic fluid supplied to the cylinder device and being separately provided with a pitch control section and a roll control section, a pitch component for a pitch control of the vehicle height change rate gain coefficients being changed by the pitch control section, and a roll component for a roll control of the vehicle height change rate gain coefficients being changed by the roll control section, said pitch component and said roll component being changed independently.
Claim 11
Dependent Claim
231 words
A vehicle suspension system comprising: a cylinder device provided between a vehicle body member and a vehicle wheel member for the vehicle body member in which suspension characteristics are changed by controlling hydraulic fluid supplied to the cylinder device, vehicle height detecting means for detecting a vehicle height displacement, vehicle height change rate detecting means for detecting a rate at which the vehicle height displacement changes, and control means for receiving signals from both the vehicle height detecting means and the vehicle height change rate detecting means to determine vehicle height change rate gain coefficients and control the hydraulic fluid supplied to the cylinder device in accordance with said vehicle height change rate gain coefficients so that the rate at which the vehicle height displacement is changed is suppressed, said control means changing the vehicle height change rate gain coefficients in accordance with a vehicle operating condition so as to change the control of the hydraulic fluid supplied to the cylinder device and being separately provided with a pitch control section and a roll control section, a pitch component for a pitch control of the vehicle height change rate gain coefficients being changed by the pitch control section, and a roll component for a roll control of the vehicle height change rate gain coefficients being changed by the roll control section, said pitch component and said roll component being changed independently.
Claim 12
Dependent Claim
24 words
A vehicle suspension system according to claim 7, wherein said control means changes the pitch component of the vehicle height change rate gain coefficients.
Claim 13
Dependent Claim
24 words
A vehicle suspension system according to claim 7, wherein said control means changes the roll component of the vehicle height change rate gain coefficients.
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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) | 1995-02-17 | 1995-08-19 | 1996-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-02-17 | 1999-08-19 | 2000-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-02-17 | 2003-08-19 | 2004-02-18 | $7700.00 | Window Closed / Lapsed |