WHEEL LIFTED AND GROUNDED IDENTIFICATION FOR AN AUTOMOTIVE VEHICLE

• US 20090037050A1
• Filed: 01/27/2008
• Published: 02/05/2009
• Est. Priority Date: 09/25/2000
• Status: Active Grant

• Current Assignee: Jianbo Lu, Joseph Carr Meyers, Michael Edward Brewer, Todd Allen Brown
• Original Assignee: Jianbo Lu, Joseph Carr Meyers, Michael Edward Brewer, Todd Allen Brown
• Inventors: LU, JIANBO, Brewer, Michael Edward, Meyers, Joseph Carr, Brown, Todd Allen
• Granted Patent: US 7,688,191 B2
• Time in Patent Office: Days
• US Class Current: 701/38
• CPC Class Codes: B60R 2021/0018 Roll-over
• CPC Class Codes: B60T 2210/22 Banked curves
• CPC Class Codes: B60T 2240/06 Wheel load; Wheel lift
• CPC Class Codes: B60T 8/172 Determining control parameters used in the regulation, e.g. by calculations involving measured or detected parameters B60T8/17551 takes precedence
• CPC Class Codes: B60W 2040/1307 Load distribution on each wheel suspension
• CPC Class Codes: B60W 2520/14 Yaw
• CPC Class Codes: B60W 2520/16 Pitch
• CPC Class Codes: B60W 2520/18 Roll
• CPC Class Codes: B60W 2520/26 Wheel slip
• CPC Class Codes: B60W 30/045 Improving turning performance
• CPC Class Codes: B60W 40/103 Side slip angle of vehicle body
• CPC Class Codes: B60W 40/12 related to parameters of the vehicle itself , e.g. tyre models

Abstract

A control system (18) for an automotive vehicle (10) has a first roll condition detector (64A), a second roll condition detector (64B), a third roll condition detector (64C), and a controller (26) that uses the roll condition generated by the roll condition detectors (64A-C) to determine a wheel lift condition. Other roll condition detectors may also be used in the wheel lift determination. The wheel lift conditions may be active or passive or both.

Claims

1. A method of controlling an automotive vehicle having a wheel comprising:

determining an actual road torque applied to the wheel;

determining a calculated road torque; and

generating a wheel lift signal in response to the calculated road torque and the actual road torque.

2. A method as recited in claim 1 wherein determining an actual road torque comprises determining an actual road torque as a function of wheel acceleration.

3. A method as recited in claim 1 wherein determining an actual road torque comprises determining an actual road torque as a function of wheel acceleration and driving torque.

4. A method as recited in claim 1 wherein determining an actual road torque comprises determining an actual road torque as a function of wheel acceleration and braking torque.

5. A method as recited in claim 1 wherein determining an actual road torque comprises determining an actual road torque as a function of wheel acceleration, driving torque and braking torque.

6. A method as recited in claim 1 wherein determining a calculated road torque comprises determining a calculated road torque in response to normal loading.

7. A method as recited in claim 1 wherein determining a calculated road torque in response to normal loading comprises determining a heave normal load and a non-heave normal load, and determining a total normal load as a function of the heave normal load and non-heave normal load.

8. A method as recited in claim 1 wherein determining a calculated road torque comprises determining a calculated road torque in response to normal loading and longitudinal wheel slip.