The present disclosure provides an aerosol delivery device and a cartridge for an aerosol delivery device. In various implementations, the aerosol delivery device comprises a control device that includes an outer housing defining a cartridge receiving chamber, and further includes a power source and a control component, and a cartridge that includes a mouthpiece, a tank, a heating assembly, and a bottom cap. The mouthpiece defines an exit portal in an end thereof, and the tank is configured to contain a liquid composition therein. The cartridge is configured to be removably coupled with the receiving chamber of the control device, and the heating assembly defines a vaporization chamber and is configured to heat the liquid composition to generate an aerosol. The heating assembly comprises a substantially planar heating member and a liquid transport element, wherein the heating member is installed in a bowed orientation.

A heating system includes a voltage source, a heating circuit, and a current sensor. The voltage source is configured to provide a current. The heater circuit is electrically coupled to the voltage source. The heater circuit includes a heater array and a compensation circuit. The heater array is configured to provide heat to a region using the current. The compensation circuit is electrically coupled to the voltage source in parallel with the heater array. The compensation circuit is configured to maintain the current above a threshold current level when the heater array is operable. The current sensor is configured to measure a level of the current to the heater circuit and output an alert in response to the current falling below the threshold current level.

The present disclosure relates to aerosol delivery devices and cartridges for aerosol delivery devices. The cartridge comprises a mouthpiece having a proximal end and a distal end, the proximal end of the mouthpiece having an exit portal defined therethrough, a tank defining a proximal end and a closed distal end, the tank being configured to contain a liquid composition that includes a distinctive characteristic, and a heater configured to heat the liquid composition. The distal end of the mouthpiece is configured to engage the proximal end of the tank, and when the cartridge is coupled with the aerosol delivery device at least one feature of the cartridge, or at least one feature of the control device, or at least one feature of both the cartridge and the control device, provides a visual indication of a color associated with the distinctive characteristic.

A control system for use in a fluid flow application includes a heater and a control device. The heater has at least one resistive heating element and the heater is operable to heat fluid. The control device determines at least one flow characteristic of a fluid flow based on a heat loss of the at least one resistive heating element and determines a mass flow rate of the fluid based on the at least one flow characteristic and a property of the at least one resistive heating element. And the property of the at least one resistive heating element includes a change in resistance of the at least one resistive heating element under a given heat flux density.

The present disclosure relates to aerosol delivery devices, methods of forming such devices, and elements of such devices. In some embodiments, the present disclosure provides devices configured for vaporization of an aerosol precursor composition through radiant heating. The radiant heat source may be a laser diode or further element suitable for providing electromagnetic radiation, and heating may be carried out within an optional chamber, which can be a radiation-trapping chamber. In some embodiments, an interior of such chamber may be configured as a black body or as a white body.

An exhaust system is provided that includes an exhaust aftertreatment unit, first and second exhaust pathway in communication with and upstream of the exhaust aftertreatment unit, a thermally activated flow control device operable in a first and second mode, and a thermal storage device. In the first mode, the flow control device permits exhaust to flow to the aftertreatment unit through the first pathway and inhibits flow through the second pathway. In the second mode, the flow control device permits exhaust flow to the aftertreatment unit through the second pathway and inhibits flow through the first pathway. The flow control device may switch between the first and second modes based on a change of temperature. The thermal storage device is within the second pathway, stores thermal mass, and provides thermal insulation to enable a catalyst of the aftertreatment unit to maintain a predetermined temperature for a predetermined time.

Methods and systems for predicting at least one temperature along a fluid flow path of a fluid flow system having a heater disposed in the fluid flow path are provided. In one example, a method includes: obtaining at least one input, wherein the at least one input includes a setpoint, a mass flow rate, an inlet temperature, or a combination thereof; calculating a temperature associated with the heater based on a predefined model and the at least one input; and setting a value of the at least one temperature along the fluid flow path to the temperature of the heater.

The present invention involves calibrating a control system to enable resistance-based control of a heat tracing circuit, that includes characterizing a piece of heat trace to determine a relationship between resistance and temperature, allowing for more precise control. Also described are different methods for practical resistance-based control of a heat trace system. Further described are several methods to monitor heat trace: including methods to enhance monitoring capabilities using a system operating model; comparison to historical operating data; and inclusion of information from external sources. Also provided is a method by which a piece of heat trace of unknown length and power factor can be controlled using the resistance-based method when other system information is available.

The present invention discloses an electronic smoking device, comprising a power supply, a controller and a heater, wherein the heater is a cylindrical shape having in the middle a heating chamber into which a cigarette is inserted, and the heater comprises at least one heating unit comprising an electronic switch and an annular electric heating element; and the electric heating element is connected to the power supply by the electronic switch, and a control terminal of the electronic switch is connected to a control signal output terminal of the controller. In the present invention, tobacco in a cigarette is heated by an electric heater so that a smoker can just smoke nicotine produced by heating the tobacco. The electric heater will not produce naked flame and therefore the heated tobacco will not produce tar and carbon monoxide, so that the harm of the tobacco to the smoker can be reduced.

A control system for use in a fluid flow application includes a heater and a control device. The heater includes at least one resistive heating element having a relationship between resistance and temperature defining a non-monotonic curve. The heater is to heat fluid flow. The control device is to determine a flow characteristic of the fluid flow and a temperature of the at least one resistive heating element along the non-monotonic curve between resistance and temperature based on a change in resistance of the at least one resistive heating element.