A thermostatic element, a main seal, that can be moved axially relative to a fixed seat to open and close a main valve and linked to the movable part of the thermostatic element to open the main valve, the main seal and the thermostatic element assembled together and forming a first module. A spring biasing the movable part towards the fixed part of the thermostatic element, controlling the closing of the main valve. A bracket supporting the spring and interposed axially between the spring and a fixed casing. A support cradle supporting the first module, removably inserting the first module therein, by axially interposing the cradle between the first module and the spring, including a by-pass seal, that is axially movable relative to a fixed seat of the bracket so as to open/close a by-pass valve when the main valve is opened/closed, and linked to the bracket in an axially movable manner, with the spring interposed axially and held fixedly to the bracket to keep the spring in the compressed state between them.

A thermostatic working element may include a cup-shaped housing having a housing jacket and a housing base, the housing containing a working chamber in which an expansion material may be located. The working element may also include an axially adjustable working piston projecting into the working chamber through a piston opening in the housing base, a cover closing a housing opening lying axially opposite the housing base, an annular seal surrounding the working piston and lying radially thereagainst, and an axial guide in a region of the housing base and surrounding and axially guiding the working piston. The annular seal may be axially in contact on a rear end side of the annular seal facing away from the housing base with the expansion material. The annular seal may lie radially against the housing jacket.

A thermostatic working element may include a cup-shaped housing having a housing jacket and a housing base, the housing containing a working chamber in which an expansion material may be located. The working element may also include an axially adjustable working piston projecting into the working chamber through a piston opening in the housing base, a cover closing a housing opening lying axially opposite the housing base, an annular seal surrounding the working piston and lying radially thereagainst, and an axial guide in a region of the housing base and surrounding and axially guiding the working piston. The annular seal may be axially in contact on a rear end side of the annular seal facing away from the housing base with the expansion material. The annular seal may lie radially against the housing jacket.

An internal combustion engine cooling device includes a piston fixedly mounted within a device housing coupled to a plurality of flow paths through which cooling water flows, the piston disposed facing the interior of the device housing; a cylinder container that advances and retreats relative to the piston and has a flange valve that opens and closes a main flow path of the cooling water; a thermal expansion unit provided within the cylinder container that causes the cylinder container to advance and retreat due to volumetric changes attendant upon temperature changes; and a heat-emitting element provided within a piston casing that heats the thermal expansion unit when supplied with electricity. An insulating cover is provided to the exterior of the cylinder container at a portion of the cylinder container disposed facing the cooling water.

Thermostatic valve including a housing; a sleeve for regulating the circulation of a fluid in the housing, movable along its axis; a thermostatic element, the moving part of which is movable along the axis relative to its stationary part resulting from an expansion of the thermodilatable material of this element so as to move the sleeve; a compression spring for returning the stationary and moving parts toward one another; and a bracket supporting the spring, which supports a decompression thrust produced by the spring and is provided with both fasteners for fastening to a bearing portion of the housing transverse to the axis, these fasteners cooperating in a form-fitting manner with the bearing portion so as to be attached with the bearing portion along the axis resulting from a decompression thrust produced by the spring, and locking for locking the bracket in position while axially abutting against the bearing portion.

A valve for a vehicle provided between a transmission and an oil cooler for cooling transmission oil may include a valve housing in which a first inflow port connected to the transmission and an exhaust port connected to the oil cooler are formed on both sides facing each other and a bypass port connected to the transmission and a second inflow port connected to the oil cooler are formed at a position spaced apart from the first inflow port and the exhaust port along a length direction of the valve housing, and a control unit that is mounted inside the valve housing selectively connects the first inflow port to the exhaust port or the bypass port while expansion or contraction is performed depending on a temperature of the transmission oil, and selectively closes the exhaust port to control a flow stream of the transmission oil.

A system, in certain embodiments, includes an SMA thermostat. The SMA thermostat includes a body, a sleeve, a biasing spring and an SMA spring. Upon actuation of the SMA spring at a phase transition temperature, the sleeve is configured to shift and expose flow ports formed in the body.

A valve assembly is provided, including at least a first valve unit and a second valve unit. The first valve unit is movably mounted within the second valve unit, and includes a first valve housing defining a first valve volume. The second valve unit includes a second valve housing defining a second valve volume different from the first valve volume. The second valve housing includes at least one first port and at least one second port. The first valve unit includes a first valve element reciprocably movable with respect to the first valve seat to selectively open and close a first fluid path through the first valve volume, and a first mechanical biasing element. The second valve unit includes a second valve element reciprocably movable with respect to the second valve seat to selectively open and close a second fluid path through the second valve chamber, the second valve element being affixed to first valve housing for reciprocal movement therewith; and a second mechanical biasing element. The first valve unit is connectable to a reciprocable actuator element, the first valve element and the second valve elements being reciprocally movable responsive to reciprocal movement of the reciprocable actuator element to selectively open the first flow path and the second flow path, respectively.

A method for operating a device at a desired temperature is described. In one example, current supplied to a heater that melts a wax medium or material controlling flow through a valve is adjusted to reduce valve opening and closing delay. The method may improve device temperature control, thereby reducing device emissions, enhancing device performance, and improving device durability.

A wax motor thermostat for an engine cooling system. The thermostat includes a cylinder having at least a first wax portion and a second wax portion each configured to expand at different temperatures. A piston is movable in response to expansion of the first and second wax portions to move the wax motor thermostat from a closed position to a fully open position or a partially open position between the closed and fully open positions to allow coolant to flow through the wax motor thermostat.