A coolant control valve unit includes a valve housing including at least a first passage and a second passage in which coolant flows and disposed at a predetermined position, a first valve and a second valve provided to open and close the first and second passages, a first stem and a second stem respectively connected with the first valve and the second valve and extending to movement directions of the first valve and the second valve, a driving plate of which one surface is connected with end portions of the first stem and the second stem, and an actuator pushing and pulling the driving plate to allow the first valve and the second valve to open and close the first passage and the second passage.

There is provided a control valve including a cylindrical casing having an inlet port and a first outlet port for a fluid, and a valve accommodated in the casing to be rotatable around an axis extending in an axial direction of the casing and having a flow path communicating with the inlet port to allow the fluid to flow therethrough, wherein a first communication port communicating with the flow path and the first outlet port according to a rotational position of the valve is formed in the valve, and a fail opening configured to be opened and closed by a thermostat is formed in a portion of the casing facing the inlet port in an opening direction of the inlet port.

A cooling circuit for internal combustion engines includes an internal combustion engine, a pressure-feeding unit for feeding coolant, which cools the internal combustion engine under pressure, a valve unit having a plurality of heat exchangers connected in parallel thereto, an exhaust heat recovery system for recovering heat from exhaust air of the internal combustion engine by the coolant, a first circulation circuit including the pressure-feeding unit, the valve unit and the exhaust heat recovery system, and a second circulation circuit including the pressure-feeding unit and the exhaust heat recovery system.

A cylinder block assembly may include a cylinder block, a cylinder body disposed in the cylinder block, with a plurality of cylinder bores formed in the cylinder body, a fluid jacket, which is formed between an inner circumferential surface of the cylinder block and an outer circumferential surface of the cylinder body, and through which coolant flows, and a block insert disposed in the water jacket and configured to guide a flow of coolant, wherein the cylinder block may include a second block coolant outlet, which is formed at a second side in a surface of an exhaust side of the cylinder block, and through which the coolant in the water jacket is discharged, and wherein the exhaust side may include a side at which combustion gas is exhausted out of the cylinder body.

A portable efficient heater management system includes an external heat source, a circulation pump that provides the circulation of the water taken from the external heat source, a heat sensor measuring the temperature of the water coming from the heat source, water transfer pipes, a two-section heat exchanger in which the waters in them do not mix with each other, but heat transfer can be made, a pressure gauge, a processor, a heat sensor placed on a generator, a generator circulation pump, a three-way valve. It also provides the engine blocks of diesel-powered generators to be heated with the heat obtained from an external heat source, as long as the heat in the external source is sufficient.

A rotor is configured to be movable among a heater water flow mode in which an air-conditioning outflow port communicates with the inside of a casing through an air-conditioning communication port, a heater cut mode in which communication between the air-conditioning outflow port and the inside of the casing through the air-conditioning communication port is cut off, and a switching mode in which a communicating area with the air-conditioning communication port in the air-conditioning outflow port varies in the process that the rotor shifts between the heater water flow mode and the heater cut mode, and the radiator outflow port communicates with the inside of the casing through the radiator communication port in the switching mode.

A control apparatus in a cooling system has an opening schedule of a degree of opening of each of a plurality of outflow ports in a control valve including at least a heater cut mode, a heater passing water mode, a fully closed mode, and a switching mode in which the opening and closing of an air conditioning outflow port is switched in a state in which at least one outflow port of a radiator outflow port and a bypass outflow port is opened and switches the heater cut mode and the heater passing water mode via the switching mode.

A temperature control apparatus of a vehicle according to the invention stops activating a heat pump and supplies heat exchanging liquid from an engine passage to a battery passage when a warming of the battery is requested and a temperature of the heat exchanging liquid flowing out of the engine passage is equal to or lower than a permitted upper limit temperature. On the other hand, the apparatus activates the heat pump to cool the heat exchanging liquid and supplies the cooled heat exchanging liquid from the engine passage to the battery passage when the warming of the battery is requested and the temperature of the heat exchanging liquid flowing out of the engine passage is higher than the permitted upper limit temperature.

To provide a construction machine including a novel preheating unit that can efficiently preheat entire circulation channel where fluid flows, and a preheating method of the construction machine. A bypass channel is arranged in a circulation channel through which the fluid is circulated, this bypass channel is provided with the preheating unit that is formed of a heater and a bypass pump. According to such configuration, even in a state circulation of the fluid may stop in the circulation channel, the fluid can be heated while the fluid is circulated through the bypass channel, and therefore the entire circulation channel can be efficiently preheated. Moreover, since retrofitting to the existing circulation channel is possible, sound versatility can be exerted.

A thermal management device for use in a vehicular or other thermal management circuit utilizes a pump, one or more valves, and one or more pressure/temperature sensors to route coolant through different desired flow paths and maintain components within the thermal circuit at appropriate temperatures.