Abstract: A liquid filter heat exchanger unit has a heat exchanger having an inlet through which a liquid is supplied to the heat exchanger and a drain through which the liquid exits after having passed through the heat exchanger. The unit also has a liquid filter with a filter housing and a filter element exchangeably arranged in a receiving chamber, wherein the liquid is supplied through the drain of the heat exchanger to an unfiltered side of the filter element. A bypass connects an inlet passage for supplying the liquid to be filtered to the receiving chamber in the filter housing. A switching member opens and closes the bypass. The switching member is formed by the filter element such that the bypass is closed when the filter element is inserted in the filter housing and is opened when the filter element is removed from the filter housing.

Abstract: A coolant circulation circuit for an engine includes a first coolant line through which coolant heated in an engine and circulated in a radiator passes, a second coolant line through which coolant heated in the engine and circulated in additional elements passes, a bypass coolant line through which coolant heated in the engine passes, a coolant outlet where the coolant flows into the engine, a first chamber where the coolant having passed through the bypass coolant line flows in, a second chamber where the coolant having passed through the second coolant line flows in, a partition formed between the first chamber and the second chamber and a thermostat selectively blocking the first chamber from the second chamber.

Abstract: A thermally responsive valve is installed in a coolant circuit of an engine 1, and is provided with an operating member 7 containing a thermal expansion element 15 which expands and contracts according to a temperature change of coolant to change a longitudinal length of the operating member 7 due to thermal expansion and contraction thereof so as to open and close a valve in the coolant circuit. The thermal expansion element 15 includes a first thermal expansion element 15a with lower thermal expansion start temperature and a lower thermal expansion response speed, and a second thermal expansion element 15b with a higher thermal expansion start temperature and a higher expansion response speed.

Abstract: Provided is a thermostat device which improves the assembling work, reduces the manufacturing cost, and transfers heat to a temperature sensing/operating part more efficiently.

Abstract: A heat transfer controlling mechanism and a fuel cell system, which allow working fluid to flow in a predetermined direction in a loop-shaped flow path without a back flow, having a simple structure independent of the orientation during use, low power consumption, and efficient heat transfer and size reduction. The mechanism includes a vaporizing portion, a condensing portion, and a loop-shaped flow path connecting the vaporizing and the condensing portions so as to seal working fluid. The mechanism transports heat by vaporizing the fluid in the vaporizing portion and condensing the fluid in the condensing portion to control heat transfer. The mechanism further includes a gas passage suppressing portion on one side in the flow path, for allowing liquid, but not gas, to pass therethrough and a liquid passage suppressing portion on the other side in the flow path, for allowing gas, but not liquid, to pass therethrough.

Abstract: A bypass valve for a cooler connected downstream from a hydraulic aggregate. The bypass valve includes a housing with ports for connection to the hydraulic aggregate and the cooler. A closure element is located in the housing for closing and opening a bypass. A spring pushes the closure element into a closing position, and thermo-sensitive means causes the closure element to open if the temperature of the hydraulic fluid is below a threshold temperature. The thermo-sensitive means are formed by the valve spring, which is made of a memory-metal alloy with a transition point close to the threshold temperature such that below the threshold temperature it no longer exerts a force and allows the closure element to open.

Abstract: An apparatus for controlling a temperature for an engine by controlling a flow of a liquid engine coolant through a coolant conduit, the apparatus including a thermostat having a temperature responsive valve for substantially blocking and substantially unblocking the flow of the liquid coolant to a radiator. The valve opens as the temperature of the liquid coolant rises and a spring urges the valve to a closed position as the temperature of the fluid falls. An electromechanical actuator is provided outside of the conduit and is controlled by an engine control system in response to engine conditions.

Abstract: A bypass valve for blocking oil flow through a radiator from a transmission with low oil temperatures includes an oil supply from the radiator, an oil supply, via a bypass line, an oil outlet and a valve unit arranged inside the valve housing. The valve unit includes a compression spring and a heat sensitive element, which move depending on the oil temperature such that when the temperature falls below a threshold value, the oil supply from the radiator is closed and the supply, via a bypass line, is opened. When the oil temperature rises above the threshold value, the oil supply from the radiator is opened and the supply, via the bypass line, is closed. The valve unit can be axially moved against the force of the compression spring, when a predefined oil pressure is reached, thus opening the supply, via the bypass line.

Abstract: A vehicle cooling system comprises a vehicle unit, a heat exchanger, a cooling fan, a coolant pump, a three-way valve, and a control unit. The heat exchanger is arranged in the coolant route to selectively receive a coolant from the coolant outlet of the vehicle unit. The cooling fan is arranged to blow cooling air to the heat exchanger. The coolant pump is arranged to circulate the coolant through the coolant route. The three-way valve is arranged to switch the coolant route between a heat exchanger route that passes through the heat exchanger and a bypass route that bypasses the heat exchanger. The control unit is configured to control operation of at least one of the cooling fan, the three-way valve and the coolant pump based on a temperature of the coolant at the heat exchanger and a temperature of the coolant at the coolant outlet of the vehicle unit.

Abstract: A water outlet chamber-type regulating device includes a chamber component having an inlet and an outlet for a fluid to be regulated, and including a member for regulating the flow, the member having a valve component translatingly movable and configured to close a passage cross-section between the inlet and the outlet, and is rigidly fixed to a control shaft. The chamber component includes at least one opening formed in its lateral wall, and the control shaft carries a second closing component, which is integral in translation with the shaft and is positioned on the shaft and has a shape that is configured to regulate the flow of water passing through the opening as a function of the regulation of the flow in the region of the passage cross-section.

Abstract: A by-pass valve for a heat exchanger circuit includes a chamber, a fixed surface secured against movement relative to the chamber, a by-pass port including a valve seat located in the chamber, an actuator located in the chamber and that moves relative to the valve seat in response to a temperature of the actuator, a valve member, a spring contacting the surface and the valve seat and producing a force urging the valve member to engage the valve seat and to close the by-pass port, the spring having no structural connection to the actuator, and a return spring secured to the actuator and contacting the valve member for urging the actuator to retract and the valve member to open the by-pass port.

Abstract: A coolant controller for a coolant circuit of an internal combustion engine has a housing and a thermostat valve arranged therein. The thermostat valve has at least one valve closing member loadable by a working element as a function of a temperature value, a temperature sensor as well as a heating element for the working element. The housing is provided with at least one plug from which connecting lines extend to the temperature sensor. A current supply for the heating element is present. The plug, the temperature sensor, the connecting lines and the current supply for the heating element are provided as a pre-manufactured assembly and this assembly is integrated into the housing.

Abstract: A valve comprising a body and a plug is disclosed. The body has a pair of ports and a tubular structure having a side wall and an open end and defining interiorly a first subchamber communicating with one port. The wall has an opening. The body defines a second subchamber communicating with the other port, extending around the wall and beyond the end to communicate with the end and the opening. The plug has an opening, is mounted to the structure and telescopes between first and second positions. At the second position, the plug is disposed at least partly in the second subchamber and the valve defines, between the ports: a first flow path through the wall opening; and a second flow path through the open end of the structure, via the plug opening. At the first position, the plug and structure restrict flow through the first and second paths.

Abstract: A cooling system for an engine is disclosed. The cooling system may have a pump driven by the engine to pressurize coolant, a single heat exchanger configured to cool pressurized coolant, and an aftercooler configured to transfer heat from air entering the engine to pressurized coolant. The cooling system may also have a multi-thermostat arrangement configured to always direct at least a portion of the pressurized coolant from the pump through the aftercooler, and selectively direct pressurized coolant from the pump through the single heat exchanger. The multi-thermostat arrangement may also be configured to selectively mix pressurized coolant from the aftercooler with a remaining portion of the pressurized coolant from the pump to form a coolant mixture, and to selectively direct the coolant mixture through the engine or around the engine.

Abstract: A heat exchanger structure of an automatic transmission stabilizing a temperature of oil is provided. A heat exchanger structure of an automatic transmission includes an automatic transmission, a first heat exchanger provided on an upstream side and a second heat exchanger provided on a downstream side, each capable of cooling oil ejected from the automatic transmission, and a thermo valve capable of supplying oil subject to heat exchange by at least one of first and second heat exchangers to the automatic transmission. When a temperature of the oil is relatively low, the thermo valve supplies oil passed through the first heat exchanger to the automatic transmission and shuts off a flow of oil from the second heat exchanger to the automatic transmission. When a temperature of the oil is relatively high, the thermo valve supplies oil passed through first and second heat exchangers to the automatic transmission.

Abstract: An air conditioner control method may entail measuring an evaporator first temperature at an exit side of the evaporator, maintaining the evaporator first temperature, measuring a length of time that the evaporator maintains the evaporator first temperature, providing a user-set evaporator target temperature; and reducing a rate of refrigerant compressed by a compressor based on a relationship between the length of time that the evaporator maintains the evaporator first temperature and the evaporator target temperature. Furthermore, an air conditioner control method utilizing a condenser and a cold storage unit may entail turning off an air conditioner compressor, maintaining operation of a condenser cooling fan, closing a thermostatic expansion valve, opening a bleed port to bypass the thermostatic expansion valve, and receiving a liquid refrigerant into the cold storage unit from the condenser after the refrigerant passes through a thermostatic expansion valve bleed port and the evaporator.

Abstract: The thermostat device is installed in a coolant circuit of an engine 1, and is provide with an operating member 7 containing a thermal expansion element 15 which expands and contracts according to a temperature change of coolant to change a longitudinal length of the operating member 15 due to thermal expansion and contraction thereof so as to open and close a valve in the coolant circuit. The thermal expansion element 15 includes a first thermal expansion element 15a with a lower thermal expansion start temperature and a lower thermal expansion response speed, and a second thermal expansion element 15b with a higher thermal expansion start temperature and a higher thermal expansion response speed.

Abstract: A valve that includes a housing defining first and second bores having a central axis, and a peripheral valve seat. An actuator is located in the first bore and has a reciprocating seal disposed for movement along the central axis for engaging the valve seat and closing the valve. A coiled return spring is mounted in the housing for urging the reciprocating seal towards the chamber to open the valve, the return spring having a first end connected to the reciprocating seal and a second end engaging a spring support in the housing facing the first bore. The return spring may have a larger diameter at its second end than its first end. The housing may include a third bore in communication with the second bore and having a different cross-sectional area than the second bore. A closure cap formed from moldable material may close an opening in the housing, the closure cap being sealably joined to the housing by a welded joint.

Abstract: A transmission thermostat device includes a body having first and second input ports and first and second output ports. A first fluid path extends between the first input port and the first output port. A second fluid path extends between the second input port and the second output port. A bypass port is disposed between the first fluid path and the second fluid path. A temperature sensing mechanism is disposed within the housing. The temperature sensing mechanism element is operative in a first mode to close the bypass port and in a second mode to open the bypass port. The temperature sensing mechanism includes a bimetal element responsive to a change in temperature.

Abstract: A flow control valve for selectively routing a coolant in a dual-zone heater system is provided. The flow control valve includes a housing and a flow control device. The housing includes an inlet port, a bypass outlet, a front heater outlet, and a rear heater outlet communicating through an internal cavity. The flow control device, which can be a cylinder, sphere, etc., is rotatably positioned in the internal cavity. The flow control device has an axial channel and generally radial aperture. The axial channel transports the coolant received from the inlet port through the flow control device, and the aperture delivers the coolant to one or more of the bypass outlet, the front heater outlet, and the rear heater outlet as the flow control device is rotated. In this way the circuit is not deadheaded.

Abstract: A thermostat for an internal combustion engine. The thermostat includes a tube type bypass valve member; a spring to keep said valve member in a closed position and a temperature sensitive actuator to move said valve member to an open position. A flow control element is provided to control a flow of fluid past said valve member as said valve member opens to prevent a sudden cooling of the engine after the engine has already reached an initial warm condition. In one embodiment a safety catch is also provided to prevent the valve from closing even if an over-temperature event damages it.

Abstract: A heat exchanger including an inlet port, an outlet port, a header, a plurality of cooling tubes, and a thermal bypass valve integrated therein. The thermal bypass valve is located in the header and is configured to restrict the flow of fluid through the cooling tubes of the heat exchanger below a target fluid temperature. The thermal bypass valve includes a valve body that is movable between first and second operational modes to restrict and not restrict the flow of fluid.

Abstract: The invention relates to a circulation system with at least one first partial flow which can flow through a first heat exchanger and a second partial flow of a first medium. According to the invention, said system comprise also at least one second heat exchanger, in particular a charge air cooler, which can be penetrated by a first media flow, and at least one adjustable mixing element which can be penetrated, on the inflow side, by a first partial flow and/or a second partial flow and, on the outflow side, generates the media flow with a target temperature.

Abstract: The object of the present invention is to obtain a thermostat device capable of improving the workability and assemblability, reducing costs, and downsizing the entire device with a minimum number of components. This thermostat device has a first valve disc 22 for opening and closing a first fluid passage 3b, and a second valve disc 23 for opening and closing a second fluid passage 3d, and constituted so as to open either the first fluid channel or second fluid channel and close the other by making the valve discs move integrally in conjunction with the operation of an operating member 21 in accordance with the temperature change of the fluid. The operating member has a case 31 which seals in one end side thereof a thermal expansion body 32 having a property of expanding and contracting in accordance with a temperature change, and retains a piston 33 from the opening of the other end side thereof in a freely reciprocable manner.

Abstract: A fluid valve for use in proportioning/mixing fluid between at least one input and at least one output. The fluid valve including a rotary actuated diverter for controlling fluid flow between the inlet(s) and outlet(s). The fluid valve may be configured to support proportioning any number of fluids, including liquids and gases, for any number of applications, including automotive and industrial applications.

Abstract: A cooling apparatus includes a thermostat that adjusts a feed rate of coolant to a radiator, estimating means that estimates a coolant temperature simulated value at least based on the detection value of an intake-air temperature sensor, and diagnosis means that diagnoses an operating state of the thermostat by comparing the detection value of a coolant temperature sensor, and the coolant temperature simulated value when a diagnosis condition is established. When a ratio of an integrated value of the simulated water temperature variation in an idle state to the integrated value of the simulated water temperature variation in a normal driving state is equal to or greater than an upper limit ratio XP, the diagnosis of the operating state of the thermostat is prohibited.

Abstract: Thermostat valve arrangement for the cooling circuit of an internal combustion engine in which a main valve member of a main valve is movably mounted in a housing which may be pressed against a main valve seat by a spring, in which a bypass valve member of a bypass valve is further provided which co-operates with a bypass valve seat in the housing and in which a first section of an expansion element (DWE) co-operates with an abutment fixed to the housing and a second section co-operates with the main valve member and the bypass valve member such that the main valve or bypass valve is selectively closed and/or opened, in order to produce the cooling circuit of the internal combustion engine by means of a radiator or a bypass, the main valve seat being formed by a conical seat surface in the housing, the main valve member forming a valve unit with an axially spaced piston-shaped bypass valve member, which valve unit receives the expansion element in an axial recess in one direction in an axially secure manner,

Abstract: An electronically controlled thermostat control method is obtained which makes it possible to eliminate the response delay from the time that the required cooling water temperature is set to the time that the actual cooling water temperature reaches the set water temperature by controlling the flow rate, and to realize high cooling water temperature tracking characteristics with a high degree of precision at a low cost.

Abstract: A thermostat for an internal combustion engine. The thermostat includes a tube type bypass valve member; a spring to keep said valve member in a closed position and a temperature sensitive actuator to move said valve member to an open position. A flow control element is provided to control a flow of fluid past said valve member as said valve member opens to prevent a sudden cooling of the engine after the engine has already reached an initial warm condition. In one embodiment a safety catch is also provided to prevent the valve from closing even if an over-temperature event damages it.

Abstract: A valve actuating mechanism for a transmission/engine fluid cooler bypass valve of the type in which a responsive element expands to urge a valve member against a valve seat and thereby causes transmission fluid to flow through an oil fluid cooler. A cast valve housing is utilized which is interposed between the cooler and the oil source. The valve actuating mechanism is designed to allow fluid to pass through the valve once the fluid has reached an elevated pressure level.

Abstract: A water out-let box comprising a regulating thermostat principally made up of a valve to block an opening of a passage emerging in the box, the valve being stressed against its seat, formed by the peripheral edge of the above-mentioned opening, by an elastic loading means and moved away from the seat by a pressure means that reacts to heat, the means with opposed actions resting, directly or indirectly, on a stress-absorbing clamp which also ensures that the thermostat is mounted and positioned in cooperation with an opposed bearing. Box is produced in a thermoplastic material and comprises, on the internal face of its constitutive wall (1?), at least two internal protrusions (10, 10?) providing permanent support surfaces (10?) for the clamp (9) of the thermostat (2), before and after installation of the box (1).

Abstract: A thermostat housing assembly (10, 100) includes a housing (12, 102) having a flange (16, 106) for mounting the housing (12, 102) on a support structure and a tubular spout (18, 108) extending from the flange (16, 106) and defining a passageway (20, 110). The flange (16, 106) presents a mounting face (26, 112) defining a seal groove (28, 114) extending annularly about the flange (16, 106) opening and having opposing side walls (32, 34, 116, 118). A seal (36, 124) is disposed in the seal groove (28, 114) for sealing the flange (16, 106) to the support structure. The seal (36, 124) has annular rings (42, 44, 126, 128). The opposing side walls (32, 34, 116, 118) include opposing channels (38, 40, 120, 122) defined therein to mechanically engage the annular rings (42, 44, 126, 128) extending radially into the opposing channels (38, 40, 120, 122) for retaining the seal (36, 124) in the seal groove (28, 114).

Abstract: A thermostat independently controlling cooling water passages of two circuits, including a first valve body having first and second passages in constant communication. A third passage is selectively connected to those passages. Communication of the third passage is disconnected when the cooling water temperature is below a prescribed temperature, and the valve is opened when the cooling water temperature is equal to or higher than the prescribed temperature. A second valve body, having fourth and fifth passages selectively in communication, closes the valve to disconnect those passages when the cooling water temperature is below the prescribed temperature, and opens the valve by operating the first valve body to link the passages when the cooling water temperature is equal to or higher than the prescribed temperature. A tubular sleeve prevents first and second control chambers, respectively including the first and second valve bodies, from communicating with each other.

Abstract: Expansion or elastic material working element, particularly for operating a thermostatic valve, having a housing and a movable working pin led out of the housing, the housing containing expansion material and a heating device with an electrical resistance element applied to a support. More particularly for increasing the response speed of such a device, according to the invention the support has a cavity and the resistance heating element is a heating conductor wound around the support.

Abstract: The invention relates to the control of the temperature of recirculated exhaust gas and oil, by means of the placement of a thermostat between an oil/water heat exchanger and a water/exhaust gas exchanger. The thermostat comprises a multifaceted casing (1), in which there is a tubular portion (2) having access to a chamber (7); and, at the bottom of the chamber (7), there is a smaller diameter by-pass passage (11), through which the chamber is linked to a connection duct (12) having access to the output channel (13) that is projected along the tubular projection (14), wherein the thermostatic valve is integrated to the casing (1) by being placed inside the chamber (7), along the tubular portion (2).

Abstract: Circulation system for the coolant in an oil cooler (13) adapted to cool down the oil of the automatic transmission (2) of a motor vehicle in which the drain conduit (15) for the coolant from the oil cooler (13) of the transmission (2) is connected to said return conduit from the radiator, and that the exit mouth (16), of said drain conduit is inserted in the return conduit forming an angle A, said angle being more than 0° and less than 90°.

Abstract: A constructive arrangement applied to an integrated thermostatic valve device has a tubular hollowed-out body (1), which allows it to have a chamber (2) and a flange (3) with holes (4) for screws for fixing to the engine housing and having a central opening (5), which determines the mouth of the chamber, alongside which there is a ring-shaped groove (6) for housing a sealing ring (7). An internal projection in the shape of an inverted “Y” (1) has a leg which is cross-shaped (11) and which extends to the level of the mouth of the body, and having on the point of the intersection of the converging part of the “Y” a fixing hole (12) for centralizing the thermostatic valve when it is being assembled. An upside down plate (3) is fixed to the end of the leg of the “Y”, between which and the converging parts of the “Y” there is a pressure spring. A pressed metal disc (17) supports the working element (16) of the thermostatic valve, with a central hole through with the terminal (18) moves.

Abstract: A cover is used to integrate two thermostat valves in a compact set, wherein the cover has a hollowed body (1) projected from a flange (2) converging to a center part in which a vertical tubular element (5) is fitted to interconnect with a radiator via a hose. In the interior of the hollowed body (1), there are two adjacent galleries (7) shaped with independent end entrances (8 and 9) that are open in the base of the flange (2), and which share a single exit (10) defined by the tubular element (5). The mouthpieces of the two independent entrances are surrounded by grooves (11) that receive sealing rings (12).

Abstract: A liquid filter/heat exchanger unit including a liquid filter and a heat exchanger, the liquid filter having a filter element in a filter housing. To bypass the heat exchanger, there is a bypass connecting the heat exchanger inlet directly to the unfiltered side of the filter element. A switching element is provided to control the liquid flow into the heat exchanger or into the bypass. The switching element is a bimetal element which is in a position directing the liquid flow into the bypass at a temperature below a switching temperature.

Abstract: The present invention has a by-pass thermostat assembly (1) that is connected to the oil circulation system of an automatic hydraulic transmission system of an internal combustion or other engine. The assembly includes a block or a case (4) with an inner housing (5) to locate a thermostatic valve within a casing (7) that acts as a piston sliding along the housing, and being biased by a spring. The housing (5) is covered by an end plug (11).

Abstract: A sealed flange includes a seal (203 or 901) and a flange (201 or 801). The outer perimeter of a flange (201 or 801) has tabs (303 or 803) interspaced with notches (601 or 805). The outer perimeter of a seal (203 or 901) has spacers (305 or 903) interspersed with gaps (501 or 909). When the seal (203 or 901) is disposed along the outer perimeter of the flange (201 or 801), the tabs (303 or 803) fit in the gaps (501 or 909) of the seal (203 or 901) while the spacers (305 or 903) fit in the notches (601 or 805) of the flange (201 or 801). The outer perimeter of the sealed flange comprises the outermost edges of the tabs (303 or 803) of the flange (201 or 801) and the outmost edges of the spacers (305 or 903) of the seal (203 or 901).

Abstract: A valve actuating mechanism for a transmission/engine fluid cooler bypass valve of the type in which a responsive element expands to urge a valve member against a valve seat and thereby causes transmission fluid to flow through an oil fluid cooler. A cast valve housing is utilized which is interposed between the cooler and the oil source. The valve actuating mechanism is designed to allow fluid to pass through the valve once the fluid has reached an elevated pressure level.

Abstract: A thermostat configured to control engine coolant temperature, a coolant temperature control method and system, includes a thermoelement, arranged to open a main valve upon reaching a predetermined temperature; a heating element arranged, based on an output signal from a controller, to heat said thermoelement, the coolant flowing through the thermostat being exclusively coolant from the radiator. Further, the controller may transmit an output signal to said heating element according to an engine signal received from an engine temperature sensor arranged near the engine block to close one or more coolant flow slots arranged at the thermostat exit until a certain predetermined temperature is sensed. The output signal may be transmitted upon the engine temperature sensor sensing a predetermined temperature.

Abstract: A valve assembly for automatically and proportionally controlling the flow of coolant fluid between an engine and a radiator for cooling the fluid heated by the engine in response to changes in the fluid temperature within a predetermined temperature range. The valve assembly includes a housing having a fluid chamber extending between opposing first and second ends. A radiator port extends between the radiator and the first end of the chamber. A bypass port extends between the engine outlet and the chamber. An engine port extends between the engine inlet and the chamber. A main valve is slidably received within the chamber for movement in and out of engagement with the first end of the chamber for closing and opening fluid flow between the radiator and the chamber. A secondary valve is slidably received within the chamber for movement with the main valve in and out of engagement with the first end of the chamber for opening and closing fluid flow between the bypass port and the chamber.

Abstract: A water-cooled multi-cylinder internal-combustion engine having a crankcase and cooling ducts which surround the cylinders and which are acted upon by coolant by way of a pump in a small cooling circuit. For switching over to a large cooling circuit provided with a radiator, a thermostat is provided which is inserted in a thermostat housing. The thermostat housing has a top part provided with coolant connections and a bottom part preferably integrated in the crankcase. An insertion part is inserted in the bottom part of the thermostat housing, which insertion part has at least one opening which is controlled by the thermostatic valve for controlling the flow in the small and the large cooling circuit.

Abstract: A variable flow thermostat, as applied to an internal combustion engine, provides a means for allowing the flow of coolant fluid from the engine block to the radiator to vary in response to the temperature of the engine coolant sensed at the engine block. The thermostat includes a central control unit that responds to changes in engine coolant temperature by sending signals to one of a plurality of control heaters, each in contact with block of a controllably expandable medium. These blocks, when heated by the control heaters, will heat and expand, exerting a force that controls the degree to which a valve opens. The valve controls the flow of coolant fluid from the engine to either a radiator or a bypass conduit. By varying how many blocks of material are heated, the position of the valve, and thus the amount of coolant reaching the radiator, can be varied.

Abstract: A valve assembly for automatically and proportionally controlling the flow of coolant fluid between an engine and a radiator for cooling the fluid heated by the engine in response to changes in the fluid temperature within a predetermined temperature range. The valve assembly includes a housing having a fluid chamber extending between opposing first and second ends. A radiator port extends between the radiator and the first end of the chamber. A bypass port extends between the engine outlet and the chamber. An engine port extends between the engine inlet and the chamber. A main valve is slidably received within the chamber for movement in and out of engagement with the first end of the chamber for closing and opening fluid flow between the radiator and the chamber. A secondary valve is slidably received within the chamber for movement with the main valve in and out of engagement with the first end of the chamber for opening and closing fluid flow between the bypass port and the chamber.

Abstract: The present invention relates to a method of controlling an electronic thermostat valve that is based on the driving conditions. The method includes using controlling parameters memorized in an ECU (Electronic Control Unit). A power source to activate the thermostat valve is originated from an expanding force of a thermal element and a change of stroke of an actuating means. A cooling system of a vehicle can be maintained in an optimized state such that fuel consumption and exhaust pollutants are reduced.

Abstract: A thermostat configured to control engine coolant temperature, a coolant temperature control method and system, includes a thermoelement, arranged to open a main valve upon reaching a predetermined temperature; a heating element arranged, based on an output signal from a controller, to heat said thermoelement, the coolant flowing through the thermostat being exclusively coolant from the radiator. Further, the controller may transmit an output signal to said heating element according to an engine signal received from an engine temperature sensor arranged near the engine block to close one or more coolant flow slots arranged at the thermostat exit until a certain predetermined temperature is sensed. The output signal may be transmitted upon the engine temperature sensor sensing a predetermined temperature.

Abstract: A valve actuating mechanism for a transmission/engine fluid cooler bypass valve of the type in which a responsive element expands to urge a valve member against a valve seat and thereby causes transmission fluid to flow through an oil fluid cooler. A cast valve housing is utilized which is interposed between the cooler and the oil source. The valve actuating mechanism is designed to allow fluid to pass through the valve once the fluid has reached an elevated pressure level.