Method of detecting a deflated tyre on a vehicle

Details Method of detecting a deflated tyre on a vehicle Method of detecting a deflated tyre on a vehicle

B - Operations, Transporting

60

C

B60C 23/06 (2006.01)

Patent

CA 2136072

A method of detecting a deflated tyre on a vehicle by comparing the rolling radii of the tyres by means of comparing angular velocity speed signals from wheel speed sensors one at each whee1 (1; 2, 3, 4), charac terised by calculating an error value DEL' where DEL' =[(C1+G4)/2-(C2+C3)/2] x 100 / (C1+C2+C3+C4)/4 wherein C1, C2, C3 and C4 are angular velocity val- ues for left-hand front (1), right hand front(2), left-hand rear(3) and right hand rear (4) wheels of the vehicle re- spectively, determining a correction factor LAT, calcu- lating a corrected error value DEL when DEL = DEL'- DELCOR wherein DELCOR=(LAT x A) + (B x LAT2) wherein A and B are vehicle related constants, and op- erating a tyre warning indicator provided in the vehicle to indicate that at least one tyre is deflated when it is sensed drat the magnitude of the corrected error value DEL is in the range 0.05 to 0.5.

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