Electronically controlled thermostat

Abstract

An electronically controlled thermostat is obtained enabling stable valve body actuation, preventing overshooting and hunting, and with a reduced overall device size and simplified construction. An electronically controlled thermostat 1 capable of arbitrary variable control of cooling water temperature comprises a thermo-element 4 having a piston which actuates the opening and closing within a housing of a first valve body 11 and a second valve body 18 to perform switching of the flow path of cooling water by sensing the cooling water temperature, and an element guide member 25 which holds the thermo-element within the above housing 10. A temperature-sensing chamber is provided, formed by isolation by the element guide member from the flow path in which cooling water on the radiator exit side flows; the temperature-sensing portion of the element 4 is disposed so as to face this [chamber]vii. A linking hole 25a is provided as a heat transmission means to transmit the temperature of cooling water on the radiator exit side from within the flow path to the element temperature-sensing portion within the temperature-sensing chamber.

Dependencies are inferred from the claim text.