Patent ID: 9429064
Filing Date: 2016-08-30
CPC Classification: F01P

Claim Text:
1. A coolant control valve apparatus comprising: a main valve that controls the flow rate of coolant in a main channel of an engine cooling system circulating the coolant between an engine and a radiator; a detour channel diverging from the main channel as a detour for the coolant from the valve to flow away from the main channel; a secondary valve moved independently from the main valve to open and close the detour channel; and a temperature detection medium that drives movement of the secondary valve to open and close the detour channel, and can open and close the secondary valve according to a temperature of the coolant, wherein the temperature detection medium is disposed in a diverging part between the detour channel and a bypass channel of the engine cooling system directing the coolant leaving the engine to bypass the radiator and return to the engine, wherein the coolant is regularly flown out of the engine, and the temperature detection medium is in the bypass channel, wherein the coolant that is flown in the bypass channel is regularly in contact with the temperature detection medium, wherein the main valve is a rotary valve provided with a rotor and includes a controlling means that controls a rotation angle of the rotor, wherein the controlling means includes a power transmission mechanism having a gear train, and wherein the secondary valve is a fail-safe valve that is driven by the temperature detection medium to be opened from a closed state according to a change of a detected temperature, and to be opened when the temperature of the coolant becomes a predetermined temperature or higher.