Abstract: A tire pressure and temperature measurement system (100) includes an oxygen sensing subsystem (140) that detects the oxygen concentration in the tire and presents an alarm condition (152) indicative of a potentially hazardous inflation gas mixture. The. oxygen sensing subsystem is mounted on or within the tire and may be implemented standalone or as a part of the temperature and pressure system. A “go no-go” indication is telemetered to the truck operator or to a remote measurement system (80) for monitoring and initiation of corrective action.

Abstract: A tire pressure and temperature measurement system adapts a Y-block (30) to an existing valve stem (20). One branch (44) of the Y-block accepts a conventional valve core (42) and another branch (38) accepts a flexible tubular temperature sensor (36) that leads “down the throat” of the existing valve stem and into the interior of a tire (14, 18). A second embodiment is adapted for use on inside dual tires (18). Making a measurement entails attaching a pressure sensor (40) to the valve stem and attaching a hand-held processor (112) to the sensors. The hand-held processor reads the current tire pressure and temperature; executes a program (Eqs. 1-6) that accounts for measured and target temperatures, vapor pressures, and gas compressibility; aid indicates how much pressure to add or subtract to the tire to achieve an accurate final tire operating pressure.

Abstract: A tire pressure and temperature measurement system adapts a Y-block (30) to an existing valve stem (20). One branch (44) of the Y-block accepts a conventional valve core (42) and another branch (38) accepts a flexible tubular temperature sensor (36) that leads "down the throat" of the existing valve stem and into the interior of a tire (14, 18). Another embodiment is adapted for use on inside dual tires (18). Making a measurement entails attaching a pressure sensor (40) to the valve stem and attaching a hand-held processor (112) to the sensors. The hand-held processor reads the current tire pressure and temperature; executes a program (Eqs. 1-6) that accounts for measured and target temperatures, vapor pressures, and gas compressibility; and indicates how much pressure to add or subtract to the tire to achieve an accurate final tire operating pressure.