A temperature control system for a vehicle, comprising a main circuit comprising a tubing in which there is provided a coolant, a main circuit pump configured to pump said coolant through the tubing of the main circuit in a first direction. Connected in parallel to the main circuit are a first and second sub-circuit for cooling or heating of components connected thereto. In the sub-circuits there are provided first and second pumps that pump coolant through said sub-circuits from a first end to second end at which the respective sub-circuit is connected the main circuit. The first end is downstream the second end as seen in the first direction in the first circuit.

An internal combustion system capable of exactly determining timing of exchanging a coolant of an engine. The internal combustion system includes an engine, cooling circulation mechanism circulating the coolant containing ethylene glycol to the engine while cooling it, temperature sensor measuring the temperature of the coolant having passed through the engine, and control device. The control device includes a number of cold starts counting unit determining engine cold start and counting the number of cold starts before coolant exchange, an accumulated amount of time measuring unit measuring an accumulated amount of time when the coolant temperature measured by the temperature sensor is a defined temperature or higher before the coolant exchange, and an exchange determination unit determining the need for coolant exchange, when the accumulated amount of time is a defined amount of time or greater and the number of cold starts is a defined number of times or greater.

A thermal management system and method for a vehicle can include providing an engine, a transmission, a radiator, and a thermostat. A first heat exchanger can be in fluid communication with the transmission to heat or cool transmission fluid. A hot branch line can extend from the engine to the first heat exchanger to supply engine coolant to the first heat exchanger. The hot branch line can be in fluid communication with each of the engine and the first heat exchanger. A heat exchanger return line can be in fluid communication with each of the first heat exchanger and an inlet of the thermostat.

A combustion machine comprising an internal combustion engine and a cooling system that has a coolant pump, a main cooler, a heating heat exchanger, a bypass which bypasses the heating heat exchanger, coolant ducts in the internal combustion engine, and a regulating device with an actuator which serves for the regulated distribution of a coolant as a function of at least one local coolant temperature. The invention is characterized in that, when the actuator is actuated in one direction, the regulating device —when it is in a first position, allows coolant flow through the internal combustion engine and the heating heat exchanger, and prevents coolant from flowing through the bypass and the main cooler; —when it is in a second position, additionally allows coolant to flow through the bypass; and —when it is in a third position, additionally allows coolant to flow through the main cooler.

A fluid flow control device controls flow of coolant in a motor vehicle motor cooling system. The flow control device includes first and second coolant inlets and first and second coolant outlets. The flow control device is operable selectively to direct coolant flowing into the device to flow out from the flow device through one or both of the first and second outlets in dependence on a temperature of fluid flowing through the device.

A valve device includes: a casing having an outflow port in which a fluid outlet opening is formed; a joint joined to an opening end surface of the outlet opening; a valve accommodated in the casing so as to be rotatable or slidable and in which a communication port that can communicate with the outlet opening is formed; and a sliding ring with a sliding surface for sliding on an outer surface of the valve while being accommodated in the outflow port and communicates the outlet and the communication port based upon a position of the valve. At least the outer surface of the valve includes a first resin material that contains a first resin, at least the sliding surface of the sliding ring includes a second resin material that contains a second resin, and the first resin and the second resin are the same type of resin.

A vehicle heating/cooling system for a vehicle comprises an internal combustion engine coupled to a closed engine coolant circuit to recirculate engine coolant therethrough; a refrigerant compressor coupled to a closed refrigerant circuit to recirculate refrigerant therethrough, wherein the refrigerant compressor is coupled to the internal combustion engine to be driven thereby; a closed thermally regulated fluid circuit to recirculate thermally regulated fluid therethrough; and a consolidated heating/cooling core coupled to the closed engine coolant circuit, to the closed refrigerant circuit and to the closed thermally regulated fluid circuit.

A method for preventing an engine overheat based on a coolant temperature applied to an engine system 1 is provided, in which a controller 50 checks if a coolant coming from an engine 10 is distributed to any one of a heater core 25B and an ATF warmer 25A as a radiator 23 is switched from a distribution blocking state (i.e., radiator closed) at a diagnosis start to a distribution state (i.e., radiator open) during the diagnosis under the control of an opening degree of an ITM valve 40, diagnoses lack of a coolant amount using factors B determined by an inlet/outlet coolant temperature difference T of the engine 10 through first and second water temperature sensors 30A and 30B as a factor cumulative value A, and then controls the ITM valve 40 to a full open state in a state where a coolant temperature increase is predicted.

A thermal management system for a vehicle may be selectively controlled to supply heat from any one of a plurality of different heat sources, to any one of a plurality of different heat sinks. The heat sources may include: an internal combustion engine, a cylinder head, an exhaust gas heat recovery system, an exhaust gas recirculation system, or a turbocharging system. The heat sinks may include: the internal combustion engine, the cylinder heat, an engine oil cooler, a transmission oil cooler, and a heating core. Each of an engine oil cooler control valve, a transmission oil cooler control valve, a heating core control valve, an engine block control valve, a cylinder head control valve, a bypass control valve, and a heat transfer control valve are controlled to effectuate a desired operating mode for the thermal management system.

A heat medium circulation equipment, a first pump, and a second pump are connected to a first switching valve and a second switching valve. A heater core is connected to at least one of the first switching valve and the second switching valve, and connected to a heat medium circuit. A state, in which the heat medium discharged by a third pump flows into the heater core, is selected by switching of a switching device.