US6324446B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roll over stability control for an automotive vehicle
Assignee: Ford Motor Co
•
Filing: 1999-12-21
•
Granted: 2001-11-27
•
Expires: 2019-12-21
Abstract
Abstract A stability control system 24 for an automotive vehicle as includes a plurality of sensors 28-37 sensing the dynamic conditions of the vehicle and a controller 26 that controls a distributed brake pressure to reduce a tire moment so the net moment of the vehicle is counter to the roll direction. The sensors include a speed sensor 30, a lateral acceleration sensor 32, a roll rate sensor 34, and a yaw rate sensor 20. The controller 26 is coupled to the speed sensor 30, the lateral acceleration sensor 32, the roll rate sensor 34, the yaw rate sensor 28. The controller 26 determines a roll angle estimate in response to lateral acceleration, roll rate, vehicle speed, and yaw rate. The controller 26 changes a tire force vector using a steering angle change in response to the relative roll angle estimate.
Inventors
- 👤 Todd Allen Brown
- 👤 Douglas Scott Rhode
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:28
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/17; B60T8/1755; B60T8/17554; B60T7/00; B60T7/12; B60T8/172; B60T8/24; B60T8/241; B60T8/243; B60W; B60W10/00; B60W10/18; B60W10/184; B60W10/20; B60G; B60G2400/00; B60G2400/05; B60G2400/052; B60G2400/0521; B60G2400/0523; B60G2400/10; B60G2400/104; B60G2400/20; B60G2400/204; B60G2400/60; B60G2400/64; B60G2800/00; B60G2800/01; B60G2800/012; B60G2800/0124; B60G2800/21; B60G2800/215; B60G2800/90; B60G2800/92; B60G2800/922; B60T2230/00; B60T2230/03; B60T2250/00; B60T2250/06; B60W2520/00; B60W2520/18; B60W2552/00; B60W2556/00; B60W2556/45; B60W2556/50; B60W2720/00; B60W2720/18; B60W30/00; B60W30/02; B60W30/04
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
84 words
A stability control system for an automotive vehicle comprising: a speed sensor; a lateral acceleration sensor; a roll rate sensor; a yaw rate sensor; and a controller coupled to said speed sensor, said lateral acceleration sensor, said roll rate sensor, said yaw rate sensor, said controller determining a roll angle estimate in response to lateral acceleration, roll rate, vehicle speed, and yaw rate, and changing a tire force vector in response to the relative roll angle estimate by determining a steering angle change factor.
Claim 2
Dependent Claim
84 words
A stability control system for an automotive vehicle comprising: a speed sensor; a lateral acceleration sensor; a roll rate sensor; a yaw rate sensor; and a controller coupled to said speed sensor, said lateral acceleration sensor, said roll rate sensor, said yaw rate sensor, said controller determining a roll angle estimate in response to lateral acceleration, roll rate, vehicle speed, and yaw rate, and changing a tire force vector in response to the relative roll angle estimate by determining a steering angle change factor.
Claim 3
Dependent Claim
31 words
A stability control system as recited in claim 1 further comprising a sensor selected from the group of a steering angle sensor, a longitudinal acceleration sensor and a pitch rate sensor.
Claim 4
Dependent Claim
33 words
A stability control system as recited in claim 2 wherein said controller determines vehicle speed at a center of gravity of the vehicle in response to said steering angle and said steering sensor.
Claim 5
Dependent Claim
29 words
A stability control system as recited in claim 1 wherein said controller changes a tire force vector by determining a brake pressure distribution and said steering angle change factor.
Claim 6
Independent Claim
85 words
A method of controlling roll stability of a vehicle having a steering angle comprising: determining a yaw rate for the vehicle; determining a roll rate for the vehicle; determining a lateral acceleration for the vehicle; determining vehicle speed; and generating a tire moment by determining a steering angle change in response to yaw rate, roll rate, lateral acceleration and vehicle speed so that a net moment on the vehicle is counter to a roll direction; and changing the steering angle by the steering angle change.
Claim 7
Independent Claim
85 words
A method of controlling roll stability of a vehicle having a steering angle comprising: determining a yaw rate for the vehicle; determining a roll rate for the vehicle; determining a lateral acceleration for the vehicle; determining vehicle speed; and generating a tire moment by determining a steering angle change in response to yaw rate, roll rate, lateral acceleration and vehicle speed so that a net moment on the vehicle is counter to a roll direction; and changing the steering angle by the steering angle change.
Claim 8
Dependent Claim
22 words
A method as recited in claim 5 wherein said step of generating comprises generating a tire moment in response to roll angle.
Claim 9
Dependent Claim
22 words
A method as recited in claim 5 wherein said step of generating comprises generating a tire moment in response to roll acceleration.
Claim 10
Dependent Claim
45 words
A method as recited in claim 5 wherein the step of generating a tire moment comprises the step of determining a brake force distribution in combination with the steering angle change in response to an estimate of normal loads at each corner of the vehicle.
Claim 11
Dependent Claim
24 words
A method as recited in claim 8 wherein the step of determining brake force distribution comprises controlling front brake pressure and rear brake pressure.
Claim 12
Independent Claim
49 words
A method of controlling roll stability of a vehicle comprising the steps of: determining a roll angle estimate in response to lateral acceleration, roll rate, vehicle speed, and yaw rate; and effecting a tire force vector in response to the relative roll angle estimate by changing a steering angle.
Claim 13
Independent Claim
49 words
A method of controlling roll stability of a vehicle comprising the steps of: determining a roll angle estimate in response to lateral acceleration, roll rate, vehicle speed, and yaw rate; and effecting a tire force vector in response to the relative roll angle estimate by changing a steering angle.
Claim 14
Dependent Claim
35 words
A method of controlling roll stability of a vehicle as recited in claim 10 further comprising the step of determining roll rate in response to a raw roll rate signal and a roll rate offset.
Claim 15
Dependent Claim
34 words
A method of controlling roll stability of a vehicle as recited in claim 10 further comprising the step of determining roll rate in response to a yaw rate signal and a yaw rate offset.
Claim 16
Dependent Claim
59 words
A method of controlling roll stability of a vehicle as recited in claim 10 further comprising the step of determining vehicle speed at the center of gravity of the vehicle as a function of a front right wheel speed, a rear right wheel speed, a front left wheel speed, a rear left wheel speed, and a steering wheel angle.
Claim 17
Dependent Claim
37 words
A method of controlling roll stability of a vehicle as recited in claim 10 further comprising the step of determining vehicle speed at the center of gravity of the vehicle as a function of body slip angle.
Claim 18
Dependent Claim
56 words
A method of controlling roll stability of a vehicle as recited in claim 10 wherein the step of determining a tire force vector includes determining brake pressure distribution by determining right side braking effort and determining a right side brake force distribution by determining the amount of front right brake force and rear right brake force.
Claim 19
Dependent Claim
54 words
A method of controlling roll stability of a vehicle as recited in claim 15 wherein the step of determining a brake pressure distribution comprises the step of determining left side braking effort and determining a left side brake force distribution by determining the amount of front left brake force and rear right brake force.
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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) | 2004-11-26 | 2005-05-28 | 2005-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-11-26 | 2009-05-28 | 2009-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-11-26 | 2013-05-28 | 2013-11-27 | $7700.00 | Window Closed / Lapsed |