AUTOMATICALLY DEPLOYING LIFT AXLE CONTROL SYSTEM

摘要

The present invention provides various devices and systems comprising a controller in connection with a first deployment mechanism to raise and lower a first lift axle on a wheeled vehicle, and in some cases a second deployment mechanism in connection with the controller for raising and lowering a second lift axle. A fail-safe mechanism is provided that automatically lowers the lift axle(s) if the controller is not receiving any electrical power.

主权项

1. A lift axle control system for a wheeled vehicle, the vehicle comprising a plurality of fixed axles with wheels in contact with a ground surface and a first lift axle with wheels operably moveable between a raised position and a lowered position, the control system comprising:a first deployment mechanism comprising:
at least one lift bag in operational communication with the first lift axle; at least one ride bag in operational communication with the first lift axle; a lift bag valve in operational communication with the at least one lift bag; a ride bag valve in operational communication with the at least one ride bag; an air source in operational communication with the at least one lift bag, the lift bag valve, the at least one ride bag, and the at least one ride bag valve;a main valve in operational communication with the first deployment mechanism;a controller in operational communication with the first deployment mechanism and the main valve and comprising:
a HCV check valve in operational communication with the at least one lift bag and the at least one ride bag; a first pressure switch comprising a predetermined pressure level in operational communication with the HCV check valve; a first solenoid valve in communication with the first pressure switch; a second pressure switch comprising a predetermined pressure level in operational communication with the HCV check valve; a second solenoid valve in communication with the second pressure switch; a third pressure switch comprising a predetermined pressure level and in operational communication with the lift bag; an annunciator in operational communication with the third pressure switch; a power source in communication with the controller; and a fail-safe solenoid valve adapted to lower the first lift axle when no power is received at the controller.