An electronic thermostat may include an internal housing including a partition defining a head chamber communicating with a cylinder head and a block chamber communicating with an engine block and the internal housing of which a head chamber hole and a block chamber hole are formed thereto, an external housing of which an outlet is formed thereto and the external housing covering the internal housing, a thermostat heater disposed to the partition, a first opening/closing portion including a first wax receiving heat from the thermostat heater and selectively closing or opening the head chamber hole and a second opening/closing portion including a second wax receiving heat from the thermostat heater and selectively closing or opening the block chamber hole.

A thermostat valve has a cylindrical valve housing formed as a single integrated unit out of synthetic resin material, having an annular body and a frame attached to one end of the annular body by a plurality of legs, a disk-shaped valve stem disposed in another end of the valve housing and movable along an axial direction, a spring seat that holds an opposite end of spring means away from the valve stem and locked and held in place by hooks at tips of locking arms extending from the valve housing, and a thermo-element fixedly mounted to an element guide provided in the frame of the valve housing that moves the valve stem in a valve opening direction in response to fluid temperature. An annular step having a top portion of predetermined width is formed adjacent to the rim of the opening in the one end of the valve housing.

A thermo valve is configured by coupling a valve body to a thermo actuator via a coupling part. The valve body has at least two recesses extending in a peripheral direction. The thermo actuator and the valve body overlap each other in a direction of an axial centerline to cover at least one of the recesses. The coupling part is formed by at least a certain section of the overlapping portion being depressed toward the axial centerline and another section of the thermo actuator fitting in the recesses. The depression of the coupling part has a shape elongated in a longitudinal direction along the axial centerline.

An electronic thermostat control system may include a control duty determination portion outputting PWM duty signal for controlling the coolant temperature according to a coolant temperature, a rising rate of the coolant temperature, an engine speed, a load and a vehicle speed, a driving portion applying a time condition to the PWM duty signal output by the control duty determination portion for controlling outputting interval, and a fault diagnosis portion diagnosing operations of the electronic thermostat by analyzing the signals output by the driving portion and changes of the coolant temperature.

Thermal management systems incorporating shape memory alloy (SMA) actuators and related methods. A thermal management system includes a heat transfer region, a process fluid conduit, a thermal management fluid conduit, and an SMA actuator assembly. The SMA actuator assembly includes an SMA element coupled to an actuation element, which is configured to assume a position among a plurality of positions defined between a restrictive position and an open position. The position of the actuation element is based, at least in part, on a conformation of the SMA element. A method of passively regulating a temperature of a process fluid includes conveying a process fluid stream in heat exchange relation with an SMA element, transitioning the SMA element to assume a conformation, flowing each of the process fluid stream and a thermal management fluid stream through a heat transfer region, and modulating a flow rate of the thermal management fluid stream.

An air flow controller for an air cleaner and an air cleaner are provided. The air flow controller may include a fan, and a housing, the fan being provided in the housing and the housing being movable from an initial horizontal position in which the air flow controller directs air flow in a vertical direction to an inclined position in which the air flow controller directs air flow in a diagonal direction.

A thermal bypass valve includes a housing defining a bore along a longitudinal axis and having two inlet ports and two outlet ports; a cap disposed within the bore; a shuttle disposed within the bore and reversibly translatable towards and away from the cap along the longitudinal axis between a first fill position, a cooling position, and a bypass position; and an actuator configured for translating the shuttle along the longitudinal axis between the cooling position and the bypass position. The actuator is formed from a shape memory alloy and is transitionable between a first state and a second state in response to a temperature of the fluid.

A thermostat device provided with a cylindrical boss protruding into a flow of fluid flowing in from a fluid inlet inside a device housing from a direction obstructing the flow of fluid, wherein a rectifying wall in the shape of a thin plate that protrudes toward an upstream side of the flow of fluid from the boss is provided as a rectifying means. The rectifying wall is formed in the shape of a plate that gradually increases in thickness from the fluid inlet side toward the boss. The leading edge along a direction of the flow of fluid is formed to have a tapered shape inclined from the tip of the boss toward the base of the boss. A side of the boss opposite the side facing the fluid inlet is provided with a rib.

A valve includes a housing which defines openings for the inlet and outlet of a fluid. The valve also includes a sleeve for controlling the circulation of the fluid through the housing. The movement of the sleeve along its axis is controlled by a thermostatic element. In order to improve the maximum flow of fluid that the valve can take in, the valve further includes a seat part, which is fixedly mounted in the housing and which includes a fluid-tight wall. One of the two opposite surfaces of the wall extends transversally to the axis of the sleeve and defines a seat bearing the sleeve. The other one of these two opposite surfaces defines, between it and a wall of the housing according to the direction of the axis of the sleeve, a free volume wherein exists one of the openings and via which the fluid flows, being distributed over the entire periphery of the sleeve when this sleeve is in its open position.

The disclosure relates to a tracking device configured to track an object in space, such as the sun, as the object moves across the sky. The tracking device may further be configured to direct a payload toward the object or toward an angle relative to the object. The tracking device may continuously or intermittently determine the location of the moving object, and adjust the position of the payload accordingly. The tracking device may calculate the position of the moving object based on GPS information, such as triangulated coordinates of the tracking device, date, and time. Generally, the tracking device may be capable of tracking an object such as the sun from anywhere on the earth's surface. The tracking device may employ one or more actuation assemblies to position the payload toward or relative to the moving object. The one or more actuation assemblies may operate through linear motion.