Provided herein is a system on a vehicle, the system comprising one or more sensors configured to monitor concentrations of each of one or more chemicals in an interior of a vehicle, one or more processors, and a memory storing instructions that, when executed by the one or more processors, causes the system to perform: one or both of ventilating the interior of the vehicle and applying heat in the interior of the vehicle in response to one or more of the concentrations being higher than respective thresholds; in response to the performing one or both of ventilating and applying the heat in the interior of the vehicle, cleaning the interior of the vehicle in response to determining that any of the one or more of the concentrations remain higher than the respective thresholds.

An air purge method in a vehicle is provided. The air purge method comprises starting a vehicle ventilation device in response to ventilation instruction; determining a current air purge status based on an operation time of the ventilation device; and indicating the current air purge status via an air purge indication device.

Disclosed is a hybrid electric vehicle and method of controlling operation of engine of the vehicle. The hybrid electric vehicle switches its drive mode in consideration of air pollution and pedestrians around the vehicle. A method of controlling a drive mode of a hybrid electric vehicle includes recognizing at least one of a pedestrian and an air pollution level around the hybrid electric vehicle, determining whether each of the recognized pedestrian and the recognized air pollution level meets a corresponding prescribed exhaust gas reduction mode request condition, and determining an exhaust gas reduction mode drive according to a result of the determination.

An air conditioning system includes: an air conditioner to regulate a state of air in a room; a sensor device including at least one detector to detect an amount of an odor-causing substance included in the air in the room; and a control device to control operation of the air conditioner. The control device includes: a first acquisition unit to acquire a detected value of each of the at least one detector at a first timing when a person is present in the room; a second acquisition unit to acquire a detected value of each of the at least one detector at a second timing later than the first timing; a difference calculator to calculate a difference between the detected value at the first timing and the detected value at the second timing; and an instruction unit to control operation of the air conditioner based on the difference.

A control method of an air conditioning system for a vehicle includes a process A of determining whether arrival at a destination is imminent based on data detected from a data detecting unit by a controller and comparing a target temperature of an evaporator with an actual temperature of the evaporator in a state of cooling a vehicle interior while the vehicle is running. A process B includes controlling a blow motor, a compressor, and a vent discharge control unit by determining whether the evaporator is cleaned by the controller through process A, and controlling an outdoor air/indoor air mode operation unit by detecting external humidity and internal humidity. A process C includes controlling the blow motor and the outdoor air/indoor air mode operation unit by comparing an external temperature with the temperature of the evaporator.

A travel sickness estimation system includes an estimation unit and an output unit. The estimation unit is configured to perform estimation processing of estimating, based on person information indicating conditions of a person who is on board a moving vehicle, whether or not the person is in circumstances that would cause travel sickness for him or her. The output unit is configured to output a result of the estimation processing performed by the estimation unit.

An air purification device includes: a carbon dioxide removal device configured to sorb and remove carbon dioxide contained in air; an air supply duct connected to a first outlet of the carbon dioxide removal device and having a blowing opening 17a for flowing out purified air from which carbon dioxide has been removed by the carbon dioxide removal device 12 into a vehicle cabin; and an exhaust duct connected to a second outlet of the carbon dioxide removal device and having an exhaust opening 18a for discharging the carbon dioxide sorbed by the carbon dioxide removal device to outside of the vehicle cabin 3, wherein the air supply duct is mounted to a front seat of the vehicle so as to be movable vertically with the blowing opening facing forward.

A system and method for robust automatic control of an air-conditioning system in a vehicle includes at least one sensor configured to continuously capture technical driving parameters of the vehicle. The system has a computing unit configured to determine a current air quality from the captured technical driving parameters by way of a suitable algorithm. The system has a control unit configured to control the air-conditioning system in the vehicle, wherein the control of the air-conditioning system includes activating the recirculation circuit of the air-conditioning system and/or activating the fresh-air circuit of the air-conditioning system with reference to the determined air quality.

A freshening composition and method of jetting a freshening composition from a microfluidic device are provided. The composition includes greater than 5 wt. % of solubilizing materials that are liquid at 20 C. Each of the solubilizing materials have a Hansen polarity parameter (p) of greater than 5 MPa0.5; a Hansen hydrogen-bonding parameter (h) of greater than 9 MPa0.5; and a vapor pressure of less than 267 Pa. The method includes heating the freshening composition with a thermal actuator and atomizing the heated composition from a nozzle in a direction that is from 0 degrees to 90 degrees from the direction of gravitational force.

Methods and systems may provide for technology to initiate an injection of ozone for a predetermined cycle time into a cabin of a vehicle via a heating ventilation and air conditioning (HVAC) subsystem of the vehicle only when the vehicle is in a locked state and a window-closed state, the vehicle cabin is vacant, and the vehicle is in park. The technology may also cease the injection of the ozone into the cabin in response to an override request detected before expiration of the predetermined cycle time and maintains the vehicle in the locked state for a predetermined wait time after the injection of the ozone into the cabin is ceased.