Patent ID: 8047551
Filing Date: 2011-11-01
Classification: B60G,Y10T

Abstract:
1. A multi-stage height control valve for a pneumatic control system of a vehicle, said height control valve being mounted on said vehicle and comprising: a) an air reservoir port being in fluid communication with a compressed air source; b) an air spring port being in fluid communication with at least one air spring of said vehicle; c) an exhaust port being in fluid communication with atmosphere; d) a pilot port being in fluid communication with a control/warning device and with a selected one or more of said air reservoir port, said air spring port or said exhaust port; and e) a flow control means being in fluid communication with said air reservoir port, said air spring port, said exhaust port and said pilot port, said flow control means being operatively attached to said vehicle for regulating fluid flow through said air reservoir port, said air spring port, said exhaust port, and said pilot port during operation of said vehicle, whereby said height control valve provides a signal via said pilot port when a secondary ride height has been reached.