System and method for desensitizing the activation criteria of a rollover control system

• US 7,277,787 B2
• Filed: 05/24/2005
• Issued: 10/02/2007
• Est. Priority Date: 08/05/2002
• Status: Active Grant

• Current Assignee: Ford Motor Company
• Original Assignee: Ford Motor Company
• Inventors: Lu, Jianbo, Salib, Albert Chenouda
• Primary Examiner(s): ARTHUR JEANGLAUDE, GERTRUDE
• Application Number:
  US11/136,172
• Publication Number:
  US 20050217917A1
• Time in Patent Office: 861 Days
• Field of Search: 701 36- 38, 701 70- 72, 280/5.502, 280/5.506, 280/5.5, 280/5.501, 280/5.504, 280/5.514, 280/6.15
• US Class Current: 701/70
• CPC Class Codes: B60G 17/0162 mainly during a motion involving steering operation, e.g. cornering, overtaking B60G17/0164 takes precedence
• CPC Class Codes: B60G 17/0195 characterised by the regulation being combined with other vehicle control systems conjoint control of vehicle sub-units including control of suspension systems B60W10/22
• CPC Class Codes: B60G 2800/012 Rolling condition
• CPC Class Codes: B60G 2800/0194 transversal with regard to vehicle
• CPC Class Codes: B60G 2800/9124 Roll-over protection systems, e.g. for warning or control
• CPC Class Codes: B60T 2201/122 Pre-actuation in case of ESP control
• CPC Class Codes: B60T 2210/22 Banked curves
• CPC Class Codes: B60T 2230/03 Overturn, rollover
• CPC Class Codes: B60T 8/17554 specially adapted for enhancing stability around the vehicles longitudinal axle, i.e. roll-over prevention road vehicle drive control systems for roll-over prevention otherwise than by controlling a particular sub-unit B60W30/04
• CPC Class Codes: B60T 8/17555 specially adapted for enhancing driver or passenger comfort, e.g. soft intervention or pre-actuation strategies
• CPC Class Codes: B60T 8/18 responsive to vehicle weight or load, e.g. load distribution using electrical circuitry on regulation means B60T8/17; B60T8/30 takes precedence; responsive to weight and speed condition B60T8/58
• CPC Class Codes: B60T 8/243 for roll-over protection

Abstract

A method of densensitizing includes determining a relative roll angle, determining when the vehicle is in a transitional maneuver, and when the vehicle is in a transitional maneuver, setting a roll signal for control to the relative roll angle, reducing control effort and controlling a safety system (38) correspondingly.

Claims

1. A method of controlling a vehicle with roll stability control comprising:

entering roll stability control;

determining a relative roll angle, said relative roll angle being an angle between the vehicle body and a wheel axis;

determining a wheel lifted or grounded state for each vehicle wheel; and

when the two inside wheels are grounded, adjusting a roll signal for control to the relative roll angle; and

exiting roll stability control when the roll signal for control is equal to the relative roll angle.

2. A method as recited in claim 1 further comprising operating a safety system in response to the roll signal for control.

3. A method as recited in claim 1 further comprising a vehicle rollover in response to the roll signal for control.

4. A method of controlling a vehicle comprising:

determining a relative roll angle, said relative roll angle being an angle between the vehicle body and a wheel axis;

determining a wheel lift status;

when the vehicle is not in a transition and the wheel lift status is grounded, adjusting a roll signal for control to be equal to the relative roll angle.

5. A method of controlling a vehicle comprising:

entering roll stability control when a roll signal for control is above a threshold;

determining a relative roll angle, said relative roll angle being an angle between the vehicle body and a wheel axis;

determining when the vehicle is in a transitional maneuver;

determining a wheel lifted or grounded state for each vehicle wheel; and

when the vehicle is in a transitional maneuver and two inside wheels are grounded, adjusting the roll signal for control to the relative roll angle; and

exiting roll stability control when the roll signal for control is less than a threshold.

6. A method as recited in claim 5 wherein the transitonal maneuver is a right to left maneuver.

7. A mehtod as recited in claim 5 wherein the transitional maneuver is a left to right maneuver.