Patent ID: 6820817
Filing Date: 2004-11-23
Classification: F01P,G05D

Abstract:
An adjustable electronic thermostat valve capable of controlling displacement of a valve plate, the adjustable electronic thermostat valve comprising:a rod inserted into a chamber enclosing an expandable thermal element, said rod having screw threads partially formed at a surface of the rod; an operating means that transfers an expansion force of the expandable thermal element to a valve plate, wherein the operating means comprises: a case configured to accommodate the chamber of the thermal element; a diaphragm closing the chamber; a power-delivering liquid that transfers movement of the diaphragm a piston linearly moving in response to movement of the power-delivering liquid; and a moveable case that opens or closes a passage by moving a valve plate in response to the movement of the piston; and an actuating means coupled with said rod and configured to rotate said rod such that said rod is moved linearly in response to activating signals from an ECU based on driving conditions, whereby the volume of the chamber is changed, and wherein the actuating means is provided with an elastic element for returning the rod to an initial position in case of electric power failure.