Patent ID: 7395177

Claim:
A method for monitoring tire pressure variation of automobile tire, comprising steps of: (1) obtaining rotation speeds of individual automobile tires, and creating rotation speed reference values Vr for comparison and judgment based on the obtained rotation speeds; (2) obtaining and calculating current rotation speeds of individual automobile tires, and calculating: reference rotation speed difference Vd=|(Vtlf−Vtrf)−(Vtlb−Vtrb)|; measured and calculated rotation speed difference Vc=|(Vclf−Vcrf)−(Vclb−Vcrb)|; and, regarding Vres=|Vd−Vc| as the compared result; wherein, Vtlf, Vtrf, Vtlb and Vtrb represent the teaching values of the measured rotation speeds of the left front tire, the right front tire, the left rear tire and the right rear tire, respectively, and Vclf, Vcrf, Vclb and Vcrb represent the current measured rotation speeds of the left front tire, the right front tire, the left rear tire and the right rear tire, respectively; (3) judging the compared result Vres and raising alarms if the compared result Vres exceeds a preset value; or else, turning to step (2).