Please download the dossier by clicking on the dossier button x
×

Method for reducing the risk of rollover of an automotive vehicle provided with a controllable suspension system

  • US 9,849,747 B2
  • Filed: 03/26/2014
  • Issued: 12/26/2017
  • Est. Priority Date: 03/26/2013
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method for reducing the rollover risk of an automotive vehicle (10) including a controllable suspension system (24-27), which comprises:

  • a first step of calculating, on the basis of a plurality of signals delivered by sensors (28, 29) of the controllable suspension system, a measured quantity (TCm) as an active value (TC) of a load transfer;

    a second step of calculating an estimated quantity (TCe), on the basis of signals delivered by kinematic sensors (50-58) placed onboard the vehicle (10) and a dynamic model (M) of the vehicle, said estimated quantity being taken as an active value of the load transfer when the measured quantity is not available;

    a step of evaluating the rollover risk on the basis of the active value (TC) of the load transfer; and

    , in the event of increased rollover risk, anda step of the emitting a safety signal (S), the safety signal (S) being taken into account in i) an actuating step of a controllable attitude correction system or ii) a step for regulating the propulsion and/or steering means of the vehicle, so as to avoid rollover of the vehicle,wherein, when the measured quantity (TCm) is available, the method includes a recalibration step for recalibrating at least one parameter (H, G) of the dynamic model (M) of the vehicle used in the second calculation step, said recalibration step comprising;

    evaluating a deviation between the measured quantity (TCm) and the estimated quantity (Tce), and, when said deviation exceeds a threshold value (e0),developing a law of evolution over time of said at least one parameter, the time evolution law tending to reduce the deviation; and

    , when the measured quantity (TCm) is available, andmodifying, upon each iteration of the second calculation step, the parameter of the dynamic model of the vehicle by using the time evolution law.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×