Patent ID: 6948721

Claim:
A variable leveling valve apparatus for a vehicle, comprising: a housing defining an inlet and an outlet connected by a flow path through which compressed air flows into and out of said housing; a connecting path defined by said housing and branched from the flow path and configured for connecting left and right air springs; a flow amount control means installed at the flow path for respectively controlling the amount of compressed air per unit hour flowing into the flow path through the inlet and the amount of compressed air per unit hour flowing outside through the connecting path to the outlet; a plunger linearly moveable to operate the flow amount control means wherein said plunger is linearly moveable and housed in the flow path; a rotor configured to linearly move said plunger; and a lever with one end coupled to said rotor for rotatably moving said rotor in response to a change in distance between a vehicle axle and a vehicle body, wherein the flow amount control means comprises: a first fixing plate defining a plurality of first through holes for passing compressed air flown from the inlet wherein said first fixing plate is located within said housing; a second fixing plate configured to face said first fixing plate wherein said second fixing plate defines a plurality of second through holes; a plurality of valve members, each having a head portion to block the plurality of second through holes and a leg portion slidingly inserted into the second through holes wherein the head portion is arranged to face the first fixing plate; a plurality of auxiliary return springs for elastically supporting the head portion to block the second throwholes; a valve member opening and closing means for pushing the leg portion of the plurality of valve members with a linear moving force transmitted from the plunger to make the head portion sequentially open the second through holes and switch the communication status of the flow path and the connecting path; and a flow-out amount control means for varying the communication between the flow path and the connecting path according to the linearly movable force of the plunger.