Patent US3306630A successfully refreshed from Google Patents.
Patent US5183127A successfully refreshed from Google Patents.
US5183127A
Expired / Lapsed
US
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Suspension-traction total control system
Assignee: Mazda Motor Corp
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Filing: 1991-12-02
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Granted: 1993-02-02
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Expires: 2011-12-02
Abstract
Abstract A vehicle is provided with both a traction control system which reduces driving torque for driving wheels of the vehicle when the driving wheels slip, and an active suspension system which has a cylinder disposed between the vehicle body and each of the wheels of the vehicle and in which suspension properties can be changed by controlling feed and discharge of the hydraulic fluid to and from the cylinders. A control gain of the active suspension system is increased when the traction control system is operating.
Inventors
- 👤 Fumio Kageyama
- 👤 Hirotaka Kanazawa
- 👤 Shin Takahara
- 👤 Toshiki Morita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:57
CPC Classifications
B; B60; B60G; B60G17/00; B60G17/015; B60G17/0195; B60T; B60T8/00; B60T8/17; B60T8/175; B60T8/32; B60T8/34; B60T8/48; B60G2202/00; B60G2202/10; B60G2202/15; B60G2202/154; B60G2204/00; B60G2204/80; B60G2400/00; B60G2400/10; B60G2400/102; B60G2400/20; B60G2400/204; B60G2400/208; B60G2400/25; B60G2400/30; B60G2400/302; B60G2400/31; B60G2400/33; B60G2400/34; B60G2400/40; B60G2400/41; B60G2400/50; B60G2400/51; B60G2400/80; B60G2400/82; B60G2400/822; B60G2600/00; B60G2600/02; B60G2600/14; B60G2600/18; B60G2600/182; B60G2800/00; B60G2800/01; B60G2800/012; B60G2800/014; B60G2800/21; B60G2800/22
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
211 words
A suspension-traction total control system for a vehicle comprising a traction control system which reduces driving torque for driving wheels of the vehicle when the driving wheels slip, with said traction control system controlling at least one of the engine and brakes for the wheels of the vehicle in order to reduce the driving torque, an active suspension system which has a cylinder disposed between the vehicle body and each of the wheels of the vehicle and in which suspension properties can be changed, a control means for controlling feed and discharge of the hydraulic fluid to and from the cylinders, and a control gain changing means which increases a control gain of the active suspension system when the traction control system is operating so that a flow rate of the hydraulic fluid is altered, wherein said control means includes a control system which suppresses the vehicle level displacement speed on the basis of vehicle level displacement speed signals which are obtained by differentiating outputs of vehicle level sensors provided for the respective wheels, the control gain of the control system being increased when the traction control system is controlling both the engine and the brakes and the value of a brake control variable is not smaller than a predetermined value.
Claim 2
Dependent Claim
211 words
A suspension-traction total control system for a vehicle comprising a traction control system which reduces driving torque for driving wheels of the vehicle when the driving wheels slip, with said traction control system controlling at least one of the engine and brakes for the wheels of the vehicle in order to reduce the driving torque, an active suspension system which has a cylinder disposed between the vehicle body and each of the wheels of the vehicle and in which suspension properties can be changed, a control means for controlling feed and discharge of the hydraulic fluid to and from the cylinders, and a control gain changing means which increases a control gain of the active suspension system when the traction control system is operating so that a flow rate of the hydraulic fluid is altered, wherein said control means includes a control system which suppresses the vehicle level displacement speed on the basis of vehicle level displacement speed signals which are obtained by differentiating outputs of vehicle level sensors provided for the respective wheels, the control gain of the control system being increased when the traction control system is controlling both the engine and the brakes and the value of a brake control variable is not smaller than a predetermined value.
Claim 3
Dependent Claim
69 words
A suspension-traction total control system as defined in claim 1 in which said active suspension system includes a second control system which suppresses vertical vibrations of the vehicle body on the basis of detecting signals of vertical acceleration sensors which detect the vertical accelerations of the vehicle body on the wheels, and the control gain of the second control system is increased when said traction control system is operating.
Claim 4
Dependent Claim
62 words
A suspension-traction total control system as defined in claim 2 in which said traction control system controls at least one of the engine and brakes for the wheels of the vehicle in order to reduce the driving, torque, and the control gain of the second control system is increased when the traction control system is controlling both the engine and the brakes.
Claim 5
Dependent Claim
50 words
A suspension-traction total control system as defined in claim 3 in which only the control gain of the second control system is increased when the traction control system is controlling both the engine and the brakes and the value of the brake control variable is smaller than the predetermined value.
Claim 6
Dependent Claim
82 words
A suspension-traction total control system as defined in claim 4 in which the control gain of the second control system is increased by a smaller value when the traction control system is controlling both the engine and the brakes and the value of the brake control variable is smaller than the predetermined value than when the traction control system is controlling both the engine and the brakes and the value of the brake control variable is not smaller than the predetermined value.
Claim 7
Dependent Claim
59 words
A suspension-traction total control system as defined in claim 3 in which the control gain of the second control system is increased to different values when the traction control system is controlling the brakes for one of the left and right wheels and when the traction control system is controlling the brakes for both the left and right wheels.
Claim 8
Dependent Claim
232 words
A suspension-traction total control system for a vehicle comprising a traction control system which reduces driving torque for driving wheels of the vehicle when the driving wheels slip, with said traction control system controlling at least one of the engine and brakes for the wheels of the vehicle in order to reduce the driving torque, an active suspension system which has a cylinder disposed between the vehicle body and each of the wheels of the vehicle and in which suspension properties can be changed by controlling feed and discharge of the hydraulic fluid to and from the cylinders, and a control gain changing means which increases a control gain of the active suspension system when the traction control system is operating, wherein said active suspension system includes a first control system which suppresses vertical vibrations of the vehicle body on the basis of detecting signals of vertical accelerations of the vehicle body of the wheels, and a second control system which suppresses the vehicle level displacement speed on the basis of vehicle level displacement speed signals which are obtained by differentiating outputs of vehicle level sensors provided for the respective wheels, both the control gains of the first and second control systems being increased when the traction control system is controlling both the engine and the brakes and the value of a brake control variable is not smaller than a predetermined value.
Claim 9
Dependent Claim
232 words
A suspension-traction total control system for a vehicle comprising a traction control system which reduces driving torque for driving wheels of the vehicle when the driving wheels slip, with said traction control system controlling at least one of the engine and brakes for the wheels of the vehicle in order to reduce the driving torque, an active suspension system which has a cylinder disposed between the vehicle body and each of the wheels of the vehicle and in which suspension properties can be changed by controlling feed and discharge of the hydraulic fluid to and from the cylinders, and a control gain changing means which increases a control gain of the active suspension system when the traction control system is operating, wherein said active suspension system includes a first control system which suppresses vertical vibrations of the vehicle body on the basis of detecting signals of vertical accelerations of the vehicle body of the wheels, and a second control system which suppresses the vehicle level displacement speed on the basis of vehicle level displacement speed signals which are obtained by differentiating outputs of vehicle level sensors provided for the respective wheels, both the control gains of the first and second control systems being increased when the traction control system is controlling both the engine and the brakes and the value of a brake control variable is not smaller than a predetermined value.
Claim 10
Dependent Claim
202 words
A suspension-traction total control system for a vehicle comprising a traction control system which reduces driving torque for driving wheels of the vehicle when the driving wheels slip, with said traction control system controlling at least one of the engine and brakes for the wheels of the vehicle in order to reduce the driving torque, an active suspension system which has a cylinder disposed between the vehicle body and each of the wheels of the vehicle and in which suspension properties can be changed by controlling feed and discharge of the hydraulic fluid to and from the cylinders, and a control gain changing means which increases a control gain of the active suspension system when the traction control system is operating, wherein said active suspension system includes a first control system which suppresses vertical vibrations of the vehicle body on the basis of detecting signals of vertical accelerations of the vehicle body on the wheels, the control gain of the first control system is increased to different values when the traction control system is controlling the brakes for one of the left and right wheels and when the traction control system is controlling the brakes for both the left and right wheels.
Claim 11
Dependent Claim
202 words
A suspension-traction total control system for a vehicle comprising a traction control system which reduces driving torque for driving wheels of the vehicle when the driving wheels slip, with said traction control system controlling at least one of the engine and brakes for the wheels of the vehicle in order to reduce the driving torque, an active suspension system which has a cylinder disposed between the vehicle body and each of the wheels of the vehicle and in which suspension properties can be changed by controlling feed and discharge of the hydraulic fluid to and from the cylinders, and a control gain changing means which increases a control gain of the active suspension system when the traction control system is operating, wherein said active suspension system includes a first control system which suppresses vertical vibrations of the vehicle body on the basis of detecting signals of vertical accelerations of the vehicle body on the wheels, the control gain of the first control system is increased to different values when the traction control system is controlling the brakes for one of the left and right wheels and when the traction control system is controlling the brakes for both the left and right wheels.
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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) | 1996-02-02 | 1996-08-03 | 1997-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-02-02 | 2000-08-03 | 2001-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-02-02 | 2004-08-03 | 2005-02-02 | $7700.00 | Window Closed / Lapsed |