An air filtration system for a passenger compartment of a motor vehicle includes a filter bed positioned downstream from a blower motor and upstream from one or more vents. The air filtration system additionally includes a heater coupled to the filter bed, a sensor configured to measure a functional capacity of the filter bed, and a controller configured to regenerate the filter bed using the heater as initiated by the real-time sensor.

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 is configured calculate a filter load based on usage time, air quality data, and flow data.

A computer-implemented air quality amelioration method, computer program product, and system for a self-driving vehicle, the method including detecting a value of an air quality within a cabin of the self-driving vehicle and performing an amelioration action to improve the value of the air quality based on the detection of the value of the air quality being less than a predetermined value.

A controller of an airflow control system is configured to instruct a blower to output an airflow, to instruct an airflow control assembly to close a door upon detection of a first threshold pressure within the interior of the cab, and to measure a depressurization time between the detection of the first threshold pressure and detection of a second threshold pressure, less than the first threshold pressure, which is used to determine a restriction factor. The controller is configured to determine an airflow rate into the interior of the cab based at least in part on the restriction factor and a pressure within the interior of the cab. The controller is further configured to instruct the blower to adjust the airflow, instruct the airflow control assembly to adjust a position of the door, or a combination thereof based at least in part on the airflow rate.

There is described a HVAC pre-filter system for a vehicle. The pre-filter system acts to prevent relatively large or coarse debris from reaching a dedicated HVAC filter through the use of at least one pre-filter element, which is provided in at least one inlet/outlet connected to ambient air. The pre-filter system has an inlet to supply air to the HVAC system, and an outlet to allow for air to exit from a vehicle cab interior, and the inlet/outlet can be switched to be fluidly coupled with either the HVAC inlet or the cab outlet. Dependent on which inlet or outlet the inlet/outlet is coupled with, the flow direction in the inlet/outlet can be controlled. Accordingly, the pre-filter can be cleaned of accumulated dust and debris by reversing the direction of airflow through the inlet/outlet.

Disclosed is an air filtration system for filtering air of an enclosed volume comprising a channel for receiving external air; a recirculation channel for receiving recirculated air from the enclosed volume; an air filter device for filtering an air flow into the enclosed volume, the air flow comprising at least one of the external air and the recirculated air; and an electronic control unit for determining a loading status of at least one air filter of the air filter device, based on: a level of particulate pollution in the external air, a level of particulate pollution in the recirculated air, a flow of the external air in the channel, a flow of the recirculated air in the recirculation channel, and an efficiency of the at least one filter of the air filter device. Further disclosed is a control device for the system, and a method for operating the system.

A method for operating a cabin air filtration system of a vehicle includes A) providing system information, B) providing a required vehicle filtration efficiency, and C) determining, from the system information for the vehicle, speed and a current magnitude of an air flow, a recirculation ratio of fresh air and recirculated air, such that a global filtration efficiency corresponds to the required vehicle filtration efficiency provided in step B).

A method for operating a cabin air filtration system of a vehicle includes retrieving, from a storage of a filter element, data comprising information characterizing the filter element, providing system information for the filter element identified by the retrieved data, retrieving current air property data referring to an air property inside and/or outside a cabin, and determining a current air quality information about a current air quality inside the cabin, from the system information for a current magnitude of an air flow, a current recirculation ratio of fresh air and recirculated air and the current air property data.

A vehicle air conditioning system has an air filter, a moisture sensor, which is mounted on and/or at the air filter, and an electronic device, which is provided for controlling and/or regulating the air conditioning system of the vehicle. The electronic device is fed a signal, delivered by the moisture sensor. The moisture sensor is arranged upstream with respect to the air filter.

Cabin air treatment apparatus for an agricultural machine, comprising at least an external air inlet, a filtration system, an HVAC system, and a cabin air supply outlet. The apparatus further comprises a hermetically closed box inside which the HVAC system is housed, the box having a levelling opening for placing the box into communication with a cabin of the agricultural machine to level a pressure inside the box with a pressure inside the cabin. The filtration system comprises a filter for effecting a filtration of at least one among dust, aerosols and vapours, arranged at an external air inlet formed on the box, and an air inlet duct arranged downstream of the filter and provided with a selecting valve having a first outlet connected to the HVAC system, and a second outlet connected to a fan of a condensation system, through a cleaning duct.