Vehicle thermal management system applying an integrated thermal management valve and a cooling circuit control method thereof

A cooling circuit control method of a vehicle thermal management system, the cooling circuit control method comprising:

• distributing a coolant flowing out toward a radiator through a radiator outlet flow path of a coolant outlet flow path to a heat exchange system comprising at least one among a heater core, an Exhaust Gas Recirculation (EGR) cooler, an oil warmer, an Auto Transmission Fluid (ATF) warmer, and an Exhaust Heat Recovery System (EHRS) by flowing the coolant of an engine circulated to a water pump and a radiator from an Integrated Thermal Management Valve (ITM) into an engine head coolant inlet and an engine block coolant inlet, and joining the coolant having passed through the EHRS in a coolant branch flow path branched from the water pump side to be connected to the coolant outlet flow path;
• adjusting a coolant flow of the coolant branch flow path connected to a second distribution flow path of the coolant outlet flow path connected to the oil warmer or the ATF warmer;
• and
• performing any one among a STATE 1, a STATE 2, a STATE 3, a STATE 4, a STATE 5, a STATE 6, a STATE 7, and a STATE 8 as an engine coolant control mode of a vehicle thermal management system under a valve opening control of the ITM by a valve controller,
• wherein the EHRS is installed at the coolant branch flow path, and
• wherein the coolant outlet flow path comprises the radiator outlet flow path connected to the radiator, a first distribution flow path connected to the heater core or the EGR cooler, and the second distribution flow path connected to the oil warmer or the ATF warmer.