Device for controlling over-rolling of vehicle body

• US 6,843,538 B1
• Filed: 11/09/1999
• Issued: 01/18/2005
• Est. Priority Date: 12/07/1998
• Status: Expired due to Term

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Nagae, Akira, Yamada, Noritaka
• Primary Examiner(s): NGUYEN, XUAN LAN T
• Application Number:
  US09/436,219
• Time in Patent Office: 1,897 Days
• Field of Search: 303/191, 303/146, 303/149, 701 82- 84, 701/89, 701/70, 280/5.51, 280/5.502, 340/429, 340/440, 180/282
• US Class Current: 303/146
• 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

Abstract

A device for controlling an over-rolling of a vehicle estimates a first parameter indicative of a rolling amount of the vehicle body, and a second parameter indicative of a change rate of the rolling amount the vehicle body. The device controls the brake system such that the brake system is actuated to accomplish a target deceleration of the vehicle when the first parameter quantity exceeds a predetermined threshold value. The target deceleration is increased from a predetermined minimum value to a predetermined maximum value according to an increase of the second parameter quantity.

Claims

1. A device for controlling an over-rolling of a vehicle having a vehicle body, wheels, a steering system, and a brake system, the device comprising:

means for providing a rolling amount of the vehicle body,

means for providing a change rate of the rolling amount of the vehicle body,

means for calculating a target deceleration of the vehicle based upon the change rate of the rolling amount so as to increase the target deceleration from a predetermined minimum value to a predetermined maximum value along with an increase of the change rate of the rolling amount, and

means for controlling of the brake system such that the brake system is actuated to accomplish the target deceleration of the vehicle when the rolling amount exceeds a threshold value predetermined therefor.

2. A device according to claim 1, wherein the first rolling amount is estimated to be substantially proportional to lateral acceleration of the vehicle body.

3. A device according to claim 1, wherein the rolling amount is estimated to be substantially proportional to a weighted sum of lateral acceleration and roll rate of the vehicle body.

4. A device according to claim 1, wherein the change rate of the rolling amount is estimated to be substantially proportional to a change rate of steering angle effected by the steering system of the vehicle.

5. A device according to claim 1, wherein the change rate of the rolling amount is estimated to be substantially proportional to a change rate of lateral acceleration of the vehicle body.

6. A device according to claim 1, wherein the means for providing the change rate of the rolling amount provides a first phase change rate of the rolling amount at a first time responsiveness and a second phase change rate of the rolling amount at a second time responsiveness slower than the first time responsiveness, and the means for controlling the brake system controls the brake system such that the target deceleration is increased from the predetermined minimum value to the predetermined maximum value according to an increase of a larger one of the first and second phase change rate of the rolling amount at each moment.