US5648902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for measuring a damping force of a shock absorber in a suspension system for a motor vehicle and a measuring system thereof
Assignee: HND Co Ltd
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Filing: 1995-06-28
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Granted: 1997-07-15
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Expires: 2015-06-28
Abstract
Abstract A method is provided for individually measuring a damping force of a shock absorber provided in a suspension system of a motor vehicle. A body of the motor vehicle is vibrated in a vertical direction. A vibrating acceleration of the body, and a load transmitted to a wheel of the vehicle are detected. The vibrating acceleration is integrated to produce a speed. A displacement of the body is obtained by integrating the speed. A reaction force of the spring is calculated by multiplying the displacement and a spring constant of the spring. A damping force is calculated by subtracting the spring reaction force from the transmitted load.
Inventors
- 👤 Hiromoto Honda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:47
CPC Classifications
B; B60; B60G; B60G17/00; B60G17/015; B60G17/016; B60G17/0165; G; G01; G01M; G01M17/00; G01M17/007; G01M17/04; B60G2400/00; B60G2400/10; B60G2400/102; B60G2400/20; B60G2400/206; B60G2400/50; B60G2400/51; B60G2400/518; B60G2400/60; B60G2400/61; B60G2800/00; B60G2800/16; B60G2800/162; B60G2800/70; B60G2800/702; B60G2800/90; B60G2800/91; B60G2800/916
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
116 words
A method for individually measuring a damping force of a shock absorber provided in a suspension system corresponding to a spring provided for each of wheels of a motor vehicle, said method comprising the steps of: vibrating a body of the motor vehicle in a vertical direction; detecting vibrating acceleration of the body; detecting load transmitted to the wheel; integrating the vibrating acceleration to produce a speed; calculating displacement of the body by integrating the speed; calculating a spring constant from the transmitted load; calculating reaction force of the spring by multiplying the displacement and the spring constant of the spring; and calculating the damping force by subtracting the spring reaction force from the transmitted load.
Claim 2
Independent Claim
116 words
A method for individually measuring a damping force of a shock absorber provided in a suspension system corresponding to a spring provided for each of wheels of a motor vehicle, said method comprising the steps of: vibrating a body of the motor vehicle in a vertical direction; detecting vibrating acceleration of the body; detecting load transmitted to the wheel; integrating the vibrating acceleration to produce a speed; calculating displacement of the body by integrating the speed; calculating a spring constant from the transmitted load; calculating reaction force of the spring by multiplying the displacement and the spring constant of the spring; and calculating the damping force by subtracting the spring reaction force from the transmitted load.
Claim 3
Dependent Claim
21 words
The method according to claim 1 wherein the spring constant is calculated from the transmitted load at maximum and minimum displacements.
Claim 4
Dependent Claim
18 words
The method according to claim 1 wherein the damping force is calculated at the maximum and minimum speeds.
Claim 5
Independent Claim
167 words
A system for individually measuring a damping force of a shock absorber provided in a suspension system corresponding to a spring provided for each of wheels of a motor vehicle, said system comprising: vibrator means mounted on a body of the motor vehicle for vibrating the body in a vertical direction; acceleration detector means mounted on the body for detecting vibrating acceleration of the body; load detector means disposed under the wheel for detecting load transmitted to the wheel; and calculator means for calculating a damping force of the shock absorber responsive to signals from the vibrator means and the detector means, the calculator means comprising a displacement calculator for calculating a displacement of the body responsive to the vibrating acceleration; a spring reaction force calculator for calculating a spring reaction force of the spring in accordance with the displacement and a spring constant of the spring; and a damping force calculator for calculating the damping force in accordance with the load and the spring reaction force.
Claim 6
Independent Claim
167 words
A system for individually measuring a damping force of a shock absorber provided in a suspension system corresponding to a spring provided for each of wheels of a motor vehicle, said system comprising: vibrator means mounted on a body of the motor vehicle for vibrating the body in a vertical direction; acceleration detector means mounted on the body for detecting vibrating acceleration of the body; load detector means disposed under the wheel for detecting load transmitted to the wheel; and calculator means for calculating a damping force of the shock absorber responsive to signals from the vibrator means and the detector means, the calculator means comprising a displacement calculator for calculating a displacement of the body responsive to the vibrating acceleration; a spring reaction force calculator for calculating a spring reaction force of the spring in accordance with the displacement and a spring constant of the spring; and a damping force calculator for calculating the damping force in accordance with the load and the spring reaction force.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2000-07-14 | 2001-01-13 | 2001-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-07-14 | 2005-01-13 | 2005-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-07-14 | 2009-01-13 | 2009-07-15 | $7700.00 | Window Closed / Lapsed |