Abstract: A computer based system for adjusting the pressure in pneumatic tires prompts the operator for pressure and vehicle type information. Comparison of vehicle type with predetermined pressure ranges is used to detect erroneously entered pressure values. A remote pressure sensor is used together with a intermittent inflation/deflation schedule to permit equalization of the hose and tire pressure without metering valves. The sampling rate of pressure in the schedule is based on total tire volume input by the user or deduced from the inflation rate.

Abstract: A computer based system for adjusting the pressure in pneumatic tires prompts the operator for pressure and vehicle type information. Comparison of vehicle type with predetermined pressure ranges is used to detect erroneously entered pressure values. A display device visually indicates the operation sequence along with displaying pressure and system error and operator error messages. A remote pressure sensor is used together with a intermittent inflation/deflation schedule to permit equalization of the hose and tire pressure without metering valves. Monitoring historical hose pressure is used to detect a number of failure modes.

Abstract: A system for shifting gears in an auxiliary transmission is provided. The system enables shifting between gears of an auxiliary transmission without stopping the vehicle and without requiring a clutch between drive-line components. The system is activated by the operator while the vehicle is moving and includes safety features that preclude downshifting when the vehicle is traveling above a predetermined speed. The system is fully compatible with automatic main transmissions. An electronic control system monitors the rotational velocities or frequencies of the input and output shafts for clutchless shifting while the vehicle is moving.

Abstract: An all wheel steering system for heavy vehicles such as airport and municipal service vehicles. A rear wheel lockout is provided to ensure safe operation by preventing rear steering above a pre-set vehicle speed. The system can be adjusted so that rear steering range angles can be varied to fit particular applications. The steering control involves the use of a closed loop position feedback circuit in which a change in the relative polarity of the command and feedback RVITs results in switching of the system between various modes.

Abstract: An all wheel steering system for heavy vehicles such as airport and municipal service vehicles. The system includes several display devices to inform the operator of the operational status of various components of the system. A rear wheel lock-out is provided to ensure safe operation by preventing rear steering above a pre-set vehicle speed. The system can be adjusted so that rear steering response timing and front and rear steering range angles can be varied to fit particular applications.