Patent Number: 6,332,354

Title: Method and apparatus for determining vehicle brake effectiveness

Abstract: This invention relates to a method and apparatus for determining theeffectiveness of a vehicle braking system and for measuring changes in themass of a wheeled vehicle. The method and apparatus include manually orautomatically measuring and inputting vehicle mass to a computer,measuring and inputting brake system pressure during deceleration of thevehicle in a normal operating mode, measuring and inputting road slope,measuring and inputting air friction and engine friction of the vehicle,determining a predicted deceleration of the vehicle, measuring actualdeceleration of the vehicle, and providing and using a computer tocalculate the effectiveness of the vehicle braking system from datarepresenting actual deceleration of the vehicle, road slope, air friction,engine friction, brake system pressure, vehicle mass, and predicteddeceleration for the vehicle under comparable circumstances, andgenerating a signal representative of the effectiveness of the vehiclebraking system. The invention also includes a mechanism to record andstore data.

Inventors: Lalor; Tom (West Vancouver, British Columbia, CA), Luker; Craig (Kamloops, CA), Loam; John (San Diego, CA)


International Classification: B60T 8/00 (20060101); B60T 17/18 (20060101); B60T 17/22 (20060101); G01L 5/28 (20060101); G01L 005/28 ()

Expiration Date: 12/25/2014