DIFFUSION DEFLATION DETECTION USING WHEEL SPEED SIGNALS

摘要

For increased safety and economic reasons in the world, motor vehicle manufacturers are beginning to install TPMS (Tire Pressure Monitoring System). There are two types of TPMS in the market; one is a direct TPMS using pressure sensor, the other is an indirect TPMS using the wheel speed sensor signals from ABS. Most indirect TPMS are unable to detect a 4-tire simultaneous deflation condition because indirect TPMS are based on the principle that the 4-tire speed signals are compared with each other. However, the SRI Group (Sumitomo Rubber Industries, Ltd.) has developed an indirect TPMS which can detect a 4-tire simultaneous deflation based on a newly developed principle using wheel speed signals from the ABS.