Freescale Semiconductor,inc.

Mark Layne Shaw

Richard J August

Xavier Lhuillier

A pump system for inflating a tire of a motorized vehicle, comprises a pump unit. The pump unit has an outlet connectable to an inlet of the tire, for providing a fluid to the inside of the tire. A communication interface is communicatively connectable to a tire pressure monitoring system, TPMS, in the vehicle, for receiving from the TPMS data representing information for controlling the providing of fluid to the tire. A pump controller is connected to the pump unit and to the communication interface and can control the pump unit based on at least the information.

Pump system and motorized vehicle

A system () and method manages battery () power in a wheel module () for indicating when air pressure in a tire falls below a recommended value. Tire air pressure is sensed with a pressure sensor (). Tire air temperature is sensed with a temperature sensor (). A determination is made whether the air pressure is increasing or decreasing with respect to time. Based upon whether a ratio of the air pressure and the air temperature is increasing, decreasing or remaining constant with respect to time, tire motion is inferred without directly sensing acceleration or movement of the tire. Power management circuitry () controls battery power to enable sensing of air pressure and air temperature at measurement intervals that are longer in time when the tire is not in motion.

Apparatus and method for power management in a tire pressure monitoring system

A motion sensor system for a tire pressure monitoring system (TPMS) that uses a piezoelectric sensor to sense vibration as an indication of wheel motion. The TPMS uses the detected vibration to transition between operation modes. In one embodiment, the TPMS has a motion mode and a park mode, wherein the TPMS has increased activity (e.g. sampling tire pressure at a higher rate and transmitting tire pressure at a higher rate) during the motion mode than in the park mode.

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Casa Grande, AZ, United States of America

Mark Layne Shaw