Abstract: A tire pressure monitoring system includes plurality of sensor modules having respective motion switches and pressure sensors respectively attached to the tires of a vehicle. The sensor modules communicate, by RF broadcast transmission, tire pressure messages at staggered times so that the transmitted messages to a passenger compartment monitor do not interfere with each other for improve reliable reception of the messages.

Abstract: A tire pressure monitor method enables the reassignment of tire pressure sensors to respective tire locations on the vehicle in the event that the sensors are lost or replaced with new sensors having differing identification codes. A passenger compartment monitors, that normally monitor tire pressures through broadcast transmission from the sensors, is manually put into an identification entry mode selecting a desired tire location, and when the vehicle begins travel, a motion switch in the new sensor detects vehicular motion and activates the transmission of the new identification code that is received by the monitor that then assigns the presently selected tire location to received identification code.

Abstract: A tire pressure monitoring system includes plurality of sensor modules having respective motion switches and pressure sensors respectively attached to the tires of a vehicle. The sensor modules communicate, by RF broadcast transmission, tire pressure messages at staggered times so that the transmitted messages to a passenger compartment monitor do not interfere with each other for improve reliable reception of the messages.

Abstract: A tire pressure monitor method enables the reassignment of tire pressure sensors to respective tire locations on the vehicle in the event that the sensors are lost or replaced with new sensors having differing identification codes. A passenger compartment monitor, that normally monitor tire pressures through broadcast transmission from the sensors, is manually into a identification entry mode selecting a desired tire location, and when the vehicle begins travel, a motion switch in the new sensor detects vehicular motion and activates the transmission of the new identification code that is received by the monitor that then assigns the presently selected tire location to received identification code.

Abstract: A vehicular tire air pressurization system having an intelligent controller for macro control is connected to one or more intelligent manifolds for micro control so as to distributively process air pressurization functions, with the controller having non volatile memory which is field programmable and alterable for storing current operating conditions, functions and parameters for communicating desired air pressures to the manifolds each connected to at least one set of tires and each including non volatile memory for storing pressurization parameters used to control inflation and deflation of the sets of tires to the desired pressures subject to the pressurization parameters which are also field programmable and alterable and which are updated after periodic pressure adjustment cycles, so that, the tires are efficiently pressurized and maintained at the desired pressures even during changing performance characteristics.

Abstract: A vehicular tire air pressurization system having an intelligent controller is connected to one or more manifolds each connected to at least one set of tires with the controller for selecting current operation conditions and controlling the manifolds to maintain tire pressure at desire air pressures, the controller having non volatile memory for storing dynamic parameters used to control manifolds having inflation and deflation valves for pressurizing the sets of tires to the desired pressures subject to dynamic parameters which are field programmable and which may be updated after each pressure adjustment cycle so that the tires are efficiently pressurized to the desired pressures even during changing dynamic characteristics caused by changing conditions such as temperature, altitude and tire wear, the non volatile memory is also for storing operational data after installation to reselect operating functions and to reset operating parameters.

Abstract: A system for inflating and deflating pneumatic tires of a vehicle through pneumatically actuated tire isolating valves is disclosed which isolates air under pressure in the tires from the system and which utilizes electronically controlled valves for achieving opening of the tire isolating alves and inflating, deflating or checking the pressure. The system is improved by incorporation of a dump valve at each tire which permits rapid deflation of the tire pressure upon demand. The dump valve is tire and system pressure responsive and is integrated into the system in a manner to be responsive to any number of deflated tire pressures. The dump valve comprises a movable piston with two positions wherein the piston is releasably held in the second position by a mechanical detent until a suitable pressure differential occurs across the axial surfaces of the piston to cause the piston to be released from the detent and to move back to the first position.

Abstract: A system for inflating and deflating pneumatic tires of a vehicle through pneumatically actuated tire isolating valves is disclosed which isolates air under pressure in the tires from the system and which utilizes electronically controlled valves for achieving opening of the tire isolating valves and inflating, deflating or eluding the pressure. The system is improved by incorporation of a dump valve at each tire which permits rapid deflation of the tire pressure upon demand. The dump valve is tire and system pressure responsive and is integrated into the system in a manner to be responsive to any number of deflated tire pressures.

Abstract: A system for inflating and deflating pneumatic tires of a vehicle through pneumatically actuated tire isolating valves which isolate air under pressure in the tires from the system comprises electronically controlled valves for achieving opening of the tire isolating valves, inflating or deflating of the vehicle tires and the quick exhausting of air under pressure from the system when the desired tire pressure is reached so as to immediately enable closure of the tire isolating valves to assure obtaining the desired pressure in the tires. Optimum rates of inflating and deflating together with accuracy in obtaining a desired tire pressure are achieved through a unique tire isolating valve construction and electronic controlled circuitry by which signals corresponding to desired and existing tire pressures are electronically compared to provide output signals by which the inflating, deflating and exhaust functions are controlled.

Abstract: A system for precise positioning of a fluid control valve including a reciprocating piston at each end of a worm shaft, each to rotate the worm shaft in one direction only, through a scotch yoke and a rotary drive transmission. Selection of a valve determines which rotary drive is operated and a hydraulic piston clutch is engaged each time a particular drive is activated and remains engaged to hold a selected position.