Device and method for monitoring the turn command to a steered rear wheel

• US 8,165,755 B2
• Filed: 05/16/2007
• Issued: 04/24/2012
• Est. Priority Date: 07/21/2006
• Status: Expired due to Fees

• Current Assignee: Renault Sas (Renault)
• Original Assignee: Renault Sas (Renault)
• Inventors: Garcia Estebanez, Pablo, Guegan, Stephane
• Primary Examiner(s): Nguyen, Tan Q
• Application Number:
  US12/374,122
• Publication Number:
  US 20090326762A1
• Time in Patent Office: 1,805 Days
• Field of Search: 701/42, 701/41, 701/69, 701/89, 701/88, 701/94, 280/5.504, 280/5.51, 180/408, 180/412, 180/413, 180/415
• US Class Current: 701/42
• CPC Class Codes: B62D 7/159 characterised by computing methods or stabilisation processes or systems, e.g. responding to yaw rate, lateral wind, load, road condition

Abstract

A device and method for monitoring a turn command to a steered rear wheel of a vehicle with at least three steered wheels, in which a steering angle datum value for the steered rear wheel is compared against a template, the comparison being made by a computer that generates the datum value.

Claims

1. A method for monitoring control of steered rear wheel deflection for a vehicle with at least three steered wheels, comprising:

comparing a steered rear wheel deflection setpoint with a template, the comparing being performed by a computer generating the setpoint, and the template being a function of an angle of deflection of front wheels or of an angle of a steering wheel.

2. The method as claimed in claim 1, in which a static steered rear wheel deflection setpoint is compared with a template.

3. The method as claimed in claim 1, in which the template comprises a lower bound and an upper bound.

4. The method as claimed in claim 3, in which the upper bound has a zero value up to a first threshold, is linearly increasing between the first threshold and a second threshold, and has a constant value beyond the second threshold.

5. The method as claimed in claim 4, in which the first threshold has a zero value.

6. The method as claimed in claim 4, in which the first threshold has a value greater than zero.

7. The method as claimed in claim 3, in which the lower bound has a zero value.

8. The method as claimed in claim 3, in which the lower bound has a zero value up to a third threshold, is linearly increasing between the third threshold and a fourth threshold, and has a constant value beyond the fourth threshold.

9. The method as claimed in claim 3, further comprising:

signaling an error when the steered wheel deflection setpoint is determined to be outside the template defined by the upper and lower bound.

10. The method as claimed in claim 1, further comprising:

estimating the states of the vehicle and disturbances which act on the vehicle.

11. A system for monitoring control of a steered rear wheel deflection for a vehicle with at least three steered wheels, comprising:

a comparison unit configured to compare a steered rear wheel deflection setpoint with a template, the comparison being performed by a computer generating the setpoint, and the template being a function of an angle of deflection of front wheels or of an angle of a steering wheel.

12. The system as claimed in claim 11, in which the template is stored in a nonvolatile memory.

13. The system as claimed in claim 11, in which a state observation unit is configured to estimate the states of the vehicle and disturbances which act on the vehicle.