THERMO BYPASS VALVE AND METHOD FOR DETECTING FAILURE OF THE SAME

摘要

Disclosed are a thermo bypass valve and a method for detecting a failure of the thermo bypass valve. The thermo bypass valve is configured to include a valve body configured to make an outlet passage and a bypass passage communicate with an inlet passage within an inner space of the valve body, a piston assembly disposed in the inner space of the valve body and have a thermal expansion material received in the piston assembly, and an elastic member disposed between the piston assembly and an inner surface of the valve body. Thus, the thermo bypass valve and the method of the present invention are capable of radically preventing oil from overheating at the time of the failure of a valve due to the leak of the thermal expansion material.

主权项

1. A thermo bypass valve, comprising:
a valve body configured to make an outlet passage and a bypass passage communicate with an inlet passage within an inner space thereof so that a fluid introduced from an outside is selectively discharged or bypassed via the inner space thereof; a piston assembly disposed in the inner space of the valve body and have a thermal expansion material received therein to make the inlet passage selectively communicate with the outlet passage or the bypass passage at a time of substantially linearly moving the piston assembly by expanding or contracting the thermal expansion material depending on a temperature of the fluid; and an elastic member disposed between the piston assembly and an inner surface of the valve body and providing an elastic repulsive force to the piston assembly in a direction in which the piston assembly moves at the time of contracting or leaking the thermal expansion material to make the inlet passage communicate with the bypass passage.