MONITORING SYSTEM FOR CONTROLLING LIFTABLE AND STEER AXLES ON TRUCKS OR TRACTOR TRAILERS

摘要

This invention provides a monitoring system to control litable or steer axles on a truck or tractor-trailer by monitoring one or more input data types selected from the group consisting of speed and direction data, load data, turn signal data, engine data and emergency signal data. After processing the input data, a control module may control the lift axle electrical valving to lift one or more liftable axles, and may also lock the steerable axle in a straight position at a predetermined forward speed or adjust the pressure on the air suspension of a steer axle to equalize axle bearing weight.