Roll-over suppressing control apparatus for a vehicle

• US 20050110345A1
• Filed: 09/29/2004
• Published: 05/26/2005
• Est. Priority Date: 09/30/2003
• Status: Active Grant

• Current Assignee: Mitsubishi FUSO Truck & Bus Corporation (Daimler Truck Holding AG)
• Original Assignee: Mitsubishi FUSO Truck & Bus Corporation (Daimler Truck Holding AG)
• Inventors: Sakata, Kunio
• Granted Patent: US 7,463,965 B2
• Time in Patent Office: Days
• 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

The invention provides a roll-over suppressing control apparatus for a vehicle wherein appropriate braking force can be applied to a turning outer wheel in response to a situation and a rolling state of the vehicle to suppress otherwise possible roll-over of the vehicle while assuring the traveling performance. A roll parameter value detection section detects a parameter value corresponding to a rolling state of a vehicle, and a turning type decision section decides a type of turning of the vehicle. A roll-over suppressing control section controls a braking mechanism in a predetermined period so that, when the rolling state of the vehicle upon turning of the vehicle is excessive with respect to a first reference state, an amount of braking force corresponding to the magnitude of the roll parameter value and the type of turning. By the control, while the traveling performance of the vehicle is assured, roll-over of the vehicle can be suppressed effectively to assure the stability of the vehicle.

Claims

1. A roll-over suppressing control apparatus for a vehicle, comprising:

a braking mechanism capable of braking left and right wheels of said vehicle separately from each other;

roll parameter value detection means for detecting a parameter value corresponding to a rolling state of said vehicle;

turning type decision means for deciding a type of turning of said vehicle; and

roll-over suppressing control means for controlling said braking mechanism in a predetermined period so that, if the rolling state of said vehicle upon turning of said vehicle becomes greater than a first reference state, then an amount of braking force which depends upon the magnitude of the parameter value detected by said roll parameter value detection means and the type of turning of said vehicle decided by said turning type decision means is applied to the turning outer wheel.

2. The roll-over suppressing control apparatus for a vehicle as claimed in claim 1, wherein said roll-over suppressing control means ends the control for applying the braking force to the turning outer wheel when the rolling state of said vehicle upon turning of said vehicle becomes smaller than a second reference state on the rolling stability side with respect to the first reference state.

3. The roll-over suppressing control apparatus for a vehicle as claimed in claim 2, wherein one of types of turning of said vehicle is steering back turning wherein the turning direction is changed over halfway, and said roll-over suppressing control means sets the amount of braking force to be applied to the turning outer wheel to a maximum value to control said braking mechanism when the magnitude of the parameter value detected by said roll parameter value detection means upon the steering back turning is equal to or greater than a first threshold value.

4. The roll-over suppressing control apparatus for a vehicle as claimed in claim 3, wherein, when the magnitude of the parameter value detected by said roll parameter value detection means upon the steering back turning is equal to or higher than a second threshold value set in advance as a value lower than the first threshold value but is lower than the first threshold value, said roll-over suppressing control means sets the amount of braking force to be applied to the turning outer wheel to a positive fixed value set in advance to control said braking mechanism.

5. The roll-over suppressing control apparatus for a vehicle as claimed in claim 4, wherein, when the magnitude of the parameter value detected by said roll parameter value detection means upon the steering back turning is equal to or higher than a third threshold value set in advance as a value lower than the second threshold value but is lower than the second threshold value, said roll-over suppressing control means controls said braking mechanism to maintain the braking force to the turning outer wheel.

6. The roll-over suppressing control apparatus for a vehicle as claimed in claim 5, wherein, when the magnitude of the parameter value detected by said roll parameter value detection means upon the steering back turning is lower than the third threshold value, said roll-over suppressing control means sets the amount of braking force to be applied to the turning outer wheel to a negative fixed value set in advance to control said braking mechanism.

7. The roll-over suppressing control apparatus for a vehicle as claimed in claim 3, wherein one of the types of turning of said vehicle is one-directional turning wherein said vehicle turns only in one direction, and said roll-over suppressing control means performs PID control based on the parameter value detected by said roll parameter value detection means upon the one-directional turning or another parameter value corresponding to the parameter value to control the amount of braking force to be applied to the turning outer wheel.

8. The roll-over suppressing control apparatus for a vehicle as claimed in claim 1, wherein parameters indicative of the rolling state of said vehicle include a roll rate of said vehicle.

9. The roll-over suppressing control apparatus for a vehicle as claimed in claim 1, wherein parameters indicative of the rolling state of said vehicle include a lateral acceleration.

10. A roll-over suppressing control apparatus for a vehicle, comprising:

a braking mechanism capable of braking left and right wheels of said vehicle separately from each other;

a roll parameter value detection sensor for detecting a parameter value corresponding to a rolling state of said vehicle;

turning type decision means for deciding a type of turning of said vehicle; and

roll-over suppressing control means for controlling said braking mechanism in a predetermined period so that, if the rolling state of said vehicle upon turning of said vehicle becomes greater than a first reference state, then an amount of braking force which depends upon the magnitude of the parameter value detected by said roll parameter value detection sensor and the type of turning of said vehicle decided by said turning type decision means is applied to the turning outer wheel.