Patent ID: 9623779
Date: 2017-04-18
CPC Classifications: B60G,B60P

Claim:
1. A bed height adjustment system for adjusting height of a bed of a vehicle comprising: an air spring supporting the bed; a valve unit connected to an air tank and configured to adjust the height of the bed by adjusting a height of the air spring by supplying and discharging air; an electric relay provided with a dump-signal line and a return-signal line each connected to the valve unit; a pressure switch configured to be switched between an ON state and an OFF state based on whether air is supplied from the valve unit; and an indicator that becomes illuminated state when powered when the pressure switch is in the ON state and becomes non-illuminated state when the pressure switch is in the OFF state, wherein the valve unit adjusts the height of the air spring into a dump mode by inputting a signal of the dump-signal line, returns the height of the air spring into a normal mode by inputting a signal of the return-signal line, and maintains the dump mode or the normal mode when no signal is input.