METHOD OF ADJUSTING A MOTOR VEHICLE ELECTRONIC STABILITY PROGRAM

• US 20070265737A1
• Filed: 05/10/2007
• Published: 11/15/2007
• Est. Priority Date: 05/10/2006
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Bouchard, Christophe, Sautereau, Richard
• Granted Patent: US 7,418,333 B2
• Time in Patent Office: Days
• US Class Current: 701/1
• 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 17/018 characterised by the use of a specific signal treatment or control method
• 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 2400/0513 Yaw angle
• CPC Class Codes: B60G 2400/0523 Yaw rate
• CPC Class Codes: B60G 2600/02 Retarders, delaying means, dead zones, threshold values, cut-off frequency, timer interruption
• CPC Class Codes: B60G 2600/124 Error signal
• CPC Class Codes: B60G 2600/70 Computer memory; Data storage, e.g. maps for adaptive control
• CPC Class Codes: B60G 2800/016 Yawing condition
• CPC Class Codes: B60G 2800/164 Heaving; Squatting
• CPC Class Codes: B60G 2800/212 Transversal; Side-slip during cornering
• CPC Class Codes: B60G 2800/702 Improving accuracy of a sensor signal
• CPC Class Codes: B60G 2800/91 Suspension Control
• CPC Class Codes: B60G 2800/92 ABS - Brake Control
• CPC Class Codes: B60G 2800/93 Skid or slide control [ASR]
• CPC Class Codes: B60G 2800/94 Electronic Stability Program (ESP, i.e. ABS+ASC+EMS)
• CPC Class Codes: B60T 2260/06 Active Suspension System
• CPC Class Codes: B60T 8/1755 Brake regulation specially adapted to control the stability of the vehicle, e.g. taking into account yaw rate or transverse acceleration in a curve road vehicle drive control systems for control of driving stability otherwise than by controlling a particular sub-unit B60W30/02
• CPC Class Codes: B60W 10/04 including control of propulsion units
• CPC Class Codes: B60W 10/18 including control of braking systems
• CPC Class Codes: B60W 10/22 : including control of suspension systems
• CPC Class Codes: B60W 2520/14 : Yaw
• CPC Class Codes: B60W 2520/20 : Sideslip angle
• CPC Class Codes: B60W 30/045 : Improving turning performance
• CPC Class Codes: B60W 40/12 : related to parameters of the vehicle itself , e.g. tyre models

Abstract

The invention relates to a method of adjusting an electronic stability program (ESP) for a motor vehicle. This method comprises various steps, including in particular: establishing the curve of the consumption values (Cesp) as a function of time, said curve being representative of the differences (dCM) of the measured yaw angles and the setpoint yaw angles (dCM=LM−LC) versus the measured triggering threshold values (St), modifying the nominal threshold values (Sv) by a percentage that is proportional to the consumption values (Cesp).

Claims

1. Method of adjusting an electronic stability program for a motor vehicle, characterized in that it comprises the following steps:

step a;

equipping a vehicle with an ESP system having nominal threshold values (Sv) for triggering the ESP system at different known speeds,

step b;

acquiring in real time, on said vehicle in a rolling situation, at various moments, setpoint yaw angles (LC),

step c;

acquiring in real time, in a rolling situation, at the same moments, the yaw angles measured on the vehicle (LM),

step d;

measuring the ESP triggering threshold (St) at these various moments,

step e;

establishing the curve of the consumption values (Cesp) as a function of time, said curve being representative of the differences (dCM) of the measured yaw angles and the setpoint yaw angles (dCM=LM−

LC) versus the measured triggering threshold values (St),

step f;

modifying the nominal threshold values (Sv) by a percentage that is proportional to the consumption values (Cesp).

4. Method according to claim 1, characterized in that said method is a method of dynamically adjusting and debugging the electronic stability program (ESP) of a vehicle.

2. Method of selecting the tire characteristics of a vehicle, characterized in that it comprises the following steps:

step a;

equipping a vehicle with an ESP system having nominal threshold values (Sv) for triggering the ESP system at different known speeds,

step b;

acquiring in real time, on said vehicle in a rolling situation, at various moments, setpoint yaw angles (LC),

step c;

acquiring in real time, in a rolling situation, at the same moments, the yaw angles measured on the vehicle (LM),

step d;

measuring the ESP triggering threshold (St) at these various moments,

step e;

establishing the curve of the consumption values (Cesp) as a function of time, said curve being representative of the differences (dCM) of the measured yaw angles and setpoint yaw angles (dCM=LM−

LC) versus the measured triggering threshold values (St),

step f;

modifying the nominal threshold values (Sv) by a percentage that is proportional to the consumption values (Cesp).

3. Method of adjusting the suspension of a vehicle, characterized in that it comprises the following steps:

step a;

equipping a vehicle with an ESP system having nominal threshold values (Sv) for triggering the ESP system at different known speeds,

step b;

acquiring in real time, on said vehicle in a rolling situation, at various moments, setpoint yaw angles (LC),

step c;

acquiring in real time, in a rolling situation, at the same moments, the yaw angles measured on the vehicle (LM),

step d;

measuring the ESP triggering threshold (St) at these various moments,

step e;

establishing the curve of the consumption values (Cesp) as a function of time, said curve being representative of the differences (dCM) of the measured yaw angles and setpoint yaw angles (dCM=LM−

LC) versus the measured triggering threshold values (St),

step f;

modifying the nominal threshold values (Sv) by a percentage that is proportional to the consumption values (Cesp).