Rollover suppression control apparatus and rollover suppression control method

• US 8,554,414 B2
• Filed: 09/08/2011
• Issued: 10/08/2013
• Est. Priority Date: 09/09/2010
• Status: Active Grant

• Current Assignee: Advics Company Limited (Aisin Corp.)
• Original Assignee: Advics Company Limited (Aisin Corp.)
• Inventors: Koto, Hideaki, Kato, Toshihisa
• Primary Examiner(s): NGUYEN, TAN QUANG
• Application Number:
  US13/227,819
• Publication Number:
  US 20120065859A1
• Time in Patent Office: 761 Days
• Field of Search: 701/41, 701/43, 701/46, 701/38, 701/70, 701/72, 701/78, 701/83, 701/91, 180/422, 180/197, 280/5.5, 280/755, 280/5.502
• US Class Current: 701/41
• 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 8/243 for roll-over protection
• CPC Class Codes: B60T 8/4872 pump-back systems

Abstract

A rollover suppression control apparatus and method are provided. The apparatus includes a rollover state value detection unit which detects a rollover state value indicating that a vehicle is under rollover tendency, a braking force applying unit which performs a rollover suppression control of applying braking force to a wheel of the vehicle to suppress the rollover thereof when the detected rollover state value is greater than the control threshold value, a understeer state detection unit which detects whether a traveling state of the vehicle is a understeer state or a non-understeer state, and a setting unit which sets a first control threshold value as the control threshold value when the traveling state is detected as the non-understeer state, and which sets a second control threshold value greater than the first control threshold value as the control threshold value when the traveling state is detected as the understeer state.

Claims

1. A rollover suppression control apparatus comprising:

a rollover state value detection unit which detects a rollover state value indicating that a vehicle is under rollover tendency;

a comparison unit which compares the detected rollover state value with a control threshold value;

a braking force applying unit which performs a rollover suppression control of applying braking force to a wheel of the vehicle to suppress the rollover of the vehicle when the detected rollover state value is greater than the control threshold value;

a understeer state detection unit which detects whether a traveling state of the vehicle is a understeer state or a non-understeer state; and

a control threshold value setting unit which sets a first control threshold value as the control threshold value when the traveling state is detected as the non-understeer state, and which sets a second control threshold value greater than the first control threshold value as the control threshold value when the traveling state is detected as the understeer state.

2. The rollover suppression control apparatus according to claim 1,

wherein the second control threshold value is set according to a degree of the understeer state of the vehicle.

3. The rollover suppression control apparatus according to claim 1, further comprising:

a braking amount setting unit which sets a first braking amount as an amount of the braking force when the traveling state is detected as the non-understeer state, and which sets a second braking amount smaller than the first braking amount as the amount of the braking force when the traveling state is detected as the understeer state.

4. A rollover suppression control method comprising:

detecting whether a traveling state of a vehicle is a understeer state or a non-understeer state;

setting a first control threshold value as a control threshold value when the traveling state is detected as the non-understeer state, and setting a second control threshold value greater than the first control threshold value when the traveling state is detected as the understeer state;

detecting a rollover state value indicating that the vehicle is under rollover tendency;

comparing the detected rollover state value with the set control threshold value; and

performing a rollover suppression control of applying braking force to a wheel of the vehicle to suppress rollover of the vehicle when the detected rollover state value is greater than the control threshold value.