A method for determining a vehicle heating, ventilation, and air conditioning (HVAC) passenger cabin air filter filtration performance includes determining a vehicle-exterior atmospheric particulate contaminant concentration, a passenger cabin air filter efficiency, and an HVAC airflow rate. The passenger cabin particulate contaminant concentration is calculated from the determined atmospheric particulate contaminant concentration, passenger cabin air filter efficiency, and HVAC airflow rate.

Methods and apparatus are provided for controlling an air quality within a passenger cabin. The method includes outputting one or more control signals, by a processor, to activate a motor to generate an airflow stream for observation by a fine particulate matter sensor, the fine particulate matter sensor generating sensor signals based on the observation; determining a concentration level of fine particulate matter in the airflow based on the sensor signals; and outputting one or more control signals to an air quality system associated with the passenger cabin to generate an airflow into the passenger cabin based on the determined concentration level, the airflow into the passenger cabin flowing through a fine particulate matter filter.

An air quality system includes an air precleaner, a filter identification component, and a control module. The air precleaner has a precleaner housing and a filter disposed inside the precleaner housing. The filter identification component is positioned within the precleaner housing at a first position and is mounted on the filter. The control module is positioned within the precleaner housing at a second position and is configured to emit an electrical field and communicate with the filter identification component via the emitted electrical field.

Disclosed is a system for use with a vehicle ventilation system having a fluid channel, the system configured to determine a loading status associated with a filter element comprising, a dosing module configured to provide a fluid having a pre-determined concentration of a first component into the fluid channel; the filter element arranged in fluid communication with the dosing module to filter the pre-determined concentration of the first component in the fluid channel, to provide a filtered fluid comprising a modified concentration of the first component; one or more sensors arranged in fluid communication with the filter element, and arranged to measure a value indicative of the modified concentration of the first component in the filtered fluid; and a processor operable to determine the loading status associated with the filter element.

A system for cleaning environmental air, including a receptable for receive a filter, the filter when installed in the receptacle being instream with a heat radiator of a vehicle in an airstream when air is flowing, the heat radiator for cooling coolant fluid, the coolant fluid for transporting heat from a part of the vehicle to be cooled to the heat radiator. The system includes a controlling circuit for controlling a fan placeable in relation to the radiator so that at least part of the air flow is produced by the fan, when the fan is operating, and to determine if environmental air requires cleaning, and further to, when operate the fan when a vehicle speed is within a speed range of fan influence. The controlling circuit may be configured to not operate the fan when a vehicle speed is out of the speed range of fan influence.

A smart multi-modal vehicular air filtration management system including a first filter element and a second filter element disposed in a fresh air housing, wherein the fresh air housing has an inlet and an outlet. Additionally, a third filter element is provided which is disposed in a cabin housing, the cabin housing having one or more inlet. A fluid channel arranged between the fresh air and cabin housing. Finally, a diverter is included which is disposed near an outlet of the fresh air housing, wherein the diverter is configured to cause air to flow through the fresh air housing selectively through one or both of the first filter element and the second filter element.

A climate control system includes a cabin air filter and a blower assembly having a motor and a fan rotated by the motor. The fan is configured to circulate air through the cabin air filter when the motor is energized. A controller is programmed to issue a message to change the cabin air filter in response to a revolution count of the motor exceeding a predefined threshold.

A ventilation system for a mobile structure, in particular a motor vehicle, includes: a variably adjustable filter device including at least one controllable, variable filter characteristic with regard to a pollutant class; means for collecting information about the air quality in the surroundings of the mobile structure and in particular information about the air quality in an interior of the mobile structure; and a control unit for varying filter characteristics of the filter device in a variable, in particular continuous, manner, on the basis of the information about the air quality.

A method is specified for determining information concerning a particle load of an airflow flowing into a vehicle interior. That method includes determining the initial mass of a filter at the start of a time interval, by means of strain gauges, passing an airflow through the filter for a time interval, determining the end mass of the filter at the end of the time interval, by means of strain gauges, ascertaining the mass difference between the end mass and the initial mass of the filter and outputting of information, based on the ascertained mass difference, concerning the particle load of the airflow. An apparatus for ascertaining information concerning a particle load of an airflow flowing into a vehicle interior is also disclosed.

Methods, systems, and devices for an automotive vehicle air cleaning system are provided which may be configured to operate in at least an adsorption mode and an in-situ regeneration mode are disclosed. The system includes at least one type of sorbent material configured to remove CO.sub.2 from a cabin of an automotive vehicle according to a repeated adsorption-desorption swing cycle, a first inlet configured to supply a first airflow of air from the cabin to the system during an adsorption mode, and a first outlet configured to return the first airflow after passing over and/or through the sorbent material during the adsorption mode. The system includes a second inlet configured to supply a second airflow of outside air to the system during a regeneration mode, a second outlet to return the second airflow after passing over and/or through the sorbent material during the regeneration mode.