Method for assisting high-performance driving of a vehicle

• US 20100164703A1
• Filed: 12/18/2009
• Published: 07/01/2010
• Est. Priority Date: 12/22/2008
• Status: Active Grant

• Current Assignee: Ferrari SPA (Stellantis NV)
• Original Assignee: Ferrari SPA (Stellantis NV)
• Inventors: Visconti, Amedeo, Cavanna, Martino
• Granted Patent: US 8,400,287 B2
• Time in Patent Office: Days
• US Class Current: 340/438
• CPC Class Codes: B60W 40/09 Driving style or behaviour
• CPC Class Codes: B60W 50/14 Means for informing the driver, warning the driver or prompting a driver intervention
• CPC Class Codes: B62D 15/029 Steering assistants using warnings or proposing actions to the driver without influencing the steering system

Abstract

An assistance method for performance driving of a vehicle; the assistance method includes the steps of: identifying a route used by the vehicle; on each section of the route, identifying the optimum point for the operation of an accelerator command, a brake command, a steering command and/or a gearbox command; identifying the current position of the vehicle along the route; identifying the next optimum point for the operation of a command; identifying a warning advance in accordance with an estimate of the reaction time of the driver and in accordance with the current speed and acceleration of the vehicle; and signalling to the driver to operate the command using the previously identified warning advance so that the driver actually operates the command at the optimum point of operation.

Claims

1. Assistance method for performance driving of a vehicle (1);

the assistance method comprises the following steps;

identifying a route (P) used by the vehicle (1);

identifying on each section of the route (P) the optimum point (P_O) for the operation of an accelerator command, a brake command, a steering command and/or a gearbox command;

identifying the current position of the vehicle (1) along the route (P);

identifying the next optimum point (P_O) for the operation of a command;

identifying a warning advance (A) in accordance with an estimate of the reaction time of the driver and in accordance with the current speed and acceleration of the vehicle (1); and

signalling to the driver to operate the command using the previously identified warning advance (A) so that the driver actually operates the command at the optimum point (P_O) of operation.

2. Assistance method according to claim 1 and comprising the further step of:

estimating the reaction time of the driver in accordance with the driving characteristics of the driver.

3. Assistance method according to claim 2 and comprising the further steps of:

identifying a difference (S) in operation between the optimum point (P_O) of operation for a command and the actual point (P_E) of operation of a command; and

updating the estimate of the reaction time of the driver in accordance with the difference (S) in operation.

4. Assistance method according to claim 3 and comprising the further steps of:

improving the estimate of the reaction time of the driver when the difference (S) in operation indicates that the actual point (P_E) of operation of the command is before the optimum point (P_S) of operation; and

worsening the estimate of the reaction time of the driver when the difference (S) in operation indicates that the actual point (P_E) of operation of the command is after the optimum point (P_O) of operation.

5. Assistance method according to claim 1 and comprising the further steps of:

using a first estimate of the reaction time of the driver to operate the accelerator command;

using a second estimate of the reaction time of the driver to operate the brake command;

using a third estimate of the reaction time of the driver to operate the steering command; and

using a fourth estimate of the reaction time of the driver to operate the gearbox command.

6. Assistance method according to claim 1 and comprising the further steps of:

determining, during a design stage, a model of the vehicle (1) which provides an estimate of the dynamic operation of the vehicle (1) along the route (P);

estimating the current value for a number of dynamic parameters on the vehicle (1); and

identifying on a section of the route (P) the optimum point (P_O) of operation for a command using the model of the vehicle (1) and supplying as an input to the model the current value of the dynamic parameters for the vehicle (1).

7. Assistance method according to claim 1 and comprising the further steps of:

identifying the optimum points (P_O) of operation of the commands before the vehicle (1) starts the route (P); and

transferring the optimum points (P_O) of operation of the commands into a memory on the vehicle (1) before the vehicle (1) starts the route (P).

8. Assistance method according to claim 7 and comprising the further steps of:

identifying the optimum points (P_O) of operation of the commands in parametric mode in accordance with the speed and acceleration of the vehicle (1); and

updating from time to time each optimum point (P_O) of operation of a command in accordance with the instantaneous speed and acceleration of the vehicle (1).

9. Assistance method according to claim 1 and comprising the further steps of:

estimating the actual value of grip of a road surface of the route (P); and

using the actual value of grip to identify the optimum points (P_O) of operation of the commands.

10. Assistance method according to claim 9 and comprising the further steps of:

performing at least one running test on a section of the route (P) to estimate beforehand the actual value of grip before starting to drive at the limit; and

requesting the driver to perform several test manoeuvres to test the grip of the road surface during driving on the test section.

11. Assistance method according to claim 1 and comprising the further steps of:

identifying a margin of safety required by the driver in respect of a physical limit of the vehicle (1); and

using the safety margin to identify the optimum points (P_O) of operation of the commands.

12. Assistance method according to claim 11 and comprising the further steps of:

estimating the reaction time of the driver and/or the driving ability in accordance with the driving characteristics of the driver; and

increasing automatically and regardless of the wishes of the driver the margin of safety when the reaction time and/or the driving ability of the driver is/are less than a first preset threshold value.

13. Assistance method according to claim 11 and comprising the further steps of:

estimating the reaction time and/or the driving ability of the driver in accordance with the driving characteristics of the driver; and

allowing a reduction in the margin of safety below a second preset threshold value only when the reaction time and/or the driving ability of the driver are greater than a third preset threshold value.