A vehicle heating, ventilation, and air conditioning (HVAC) system including a cabin air filter, a sensor for providing a sensor reading, and a controller for determining a feedback signal from the sensor reading, wherein the feedback signal relates to a usage modifier of the cabin air filter.

A vehicle includes a vehicle cabin, a filter configured to allow air blown toward the vehicle cabin to pass through the filter while adsorbing at least a portion of a substance contained in the air, a sensor configured to detect the state of the air passing through the filter, and a control device configured to output information relating to maintenance of the filter based on the result of detection performed by the sensor.

An air purification system includes a housing having an air inlet and an air outlet, an air circulation unit disposed between the air inlet and the air outlet, and an air purification assembly disposed adjacent the air circulation unit. The air circulation unit may be configured to circulate air from the air inlet to the air outlet. The air purification assembly includes a UV-A light source, a UV-C light source, and a photocatalytic filter configured to activate responsive to light produced by each of the UV-A and UV-C light sources. The UV-A light source and the UV-C light source may be oriented to illuminate the photocatalytic filter and the air purification assembly is configured to purify the air circulated by the air circulation unit.

In a vehicle, a first gas sensor detects a hydrogen gas concentration of a vehicle interior front zone. Air-conditioning corresponding to an operation of a suction air switching button or the like is performed until the hydrogen gas concentration of the vehicle interior front zone reaches a predetermined second reference concentration, and any one of interior air mode switching control of an interior/exterior air switching mechanism and stop control of a blower is performed regardless of the operation of the suction air switching button or the like when the hydrogen gas concentration reaches the second predetermined reference concentration.

For the purpose of gas quality monitoring, a spectroscopic examination of a gas sample from a space (10) to be monitored is carried out, e.g. by Raman spectroscopy. The spectroscopic examination yields a measurement spectrum extending over a wavelength range. A deviation of the measurement spectrum from at least one comparison sample (160) is then detected. Depending on the detected deviation, a gas quality warning (QW) is produced.

The present disclosure discloses an infrared sensor, an infrared gas detector and an air quality detection device. The infrared sensor includes electrodes, a substrate, an isolation layer and a graphene film. The graphene film has a periodical nanostructure. The infrared sensor enhances the absorption of infrared light, and is capable of only absorbing specific infrared wavelengths, thus improving the selective performance of the infrared gas detector.

Methods and systems for mitigating irritants during travel in a vehicle. The method includes determining, at a remote server, an airborne irritant is present external to the vehicle, which may involve data from the vehicle or from other nearby vehicles. The data may be direct irritant measurements by sensors or may be indirect data indicative of possible irritants. Based on the determination that the airborne irritant is likely present external to the vehicle, an irritant mitigation action is caused within the vehicle. The irritant mitigation action may include displaying a notification signaling presence of the airborne irritant, outputting an audio notification signaling presence of the airborne irritant, closing a window of the vehicle, or closing an air vent of the vehicle.

An in-vehicle system and method are disclosed for identifying changes in the scene inside the cabin of the vehicle before and after usage thereof. The in-vehicle system includes a plurality of sensors that measure, capture, and/or receive data relating to attributes the interior of the cabin. The in-vehicle system includes a scene estimator that determines and/or estimates one or more attributes of the interior of the cabin based on individual sensor signals received from the sensors. The scene estimator determines additional attributes based on combinations of one or more of the attributes determined based on the sensor signals individually. The attributes determined by the scene estimator collectively comprise an estimation of the scene inside the cabin of the vehicle. The scene estimator determines changes in the scene inside the cabin based on changes in the scene estimation before and after usage thereof.

An exhaust intrusion mitigation system for a vehicle includes one or more processors and a memory communicably coupled to the one or more processors. The memory stores an enclosure detection module which determines if a vehicle is parked within an enclosure with the engine running. An exhaust module determines a point in time at which one or more vehicle vents should be closed if the vehicle remains in the enclosure and the engine remains on. A mitigation module controls operation of the vehicle to close the one or more vents at the point in time when the vent(s) should be closed.

A vehicle air control system includes a vehicle body that defines an interior. A first particulate matter sensor is coupled to an exterior of the vehicle body. A second particulate matter sensor is disposed within the interior of the vehicle body. A temperature sensor is coupled to the exterior of the vehicle body. A vehicle speed sensor is coupled to the vehicle body. A heat, ventilation, and air condition (HVAC) system is disposed within the interior of the vehicle body. The HVAC system includes an inlet door rotatable between a first position, a second position, and a third position therebetween. A controller is configured to receive a signal from at least one of the first and second particulate matter sensors, the temperature sensors, and the vehicle speed sensor. The controller is configured to rotate the inlet door in response to the signal.