New Volvo XC90 debuts enhanced multi-filter that improves interior air quality

13 November 2014

Volvo is introducing a larger, more efficient multi-filter in its cabins as part of its CleanZone initiative. CleanZone is an approach to controlling interior air quality and providing a better driving environment through innovative solutions for enhanced wellbeing and health. Drivers can breathe easier because most microscopic, hazardous “fine dust” particles will now be prevented from entering the car.

The multi-filter was designed especially for the SPA platform and will first appear in the all-new XC90 in the beginning of 2015. It features a larger design that intercepts more particulates and pollen, as well as a layer of active charcoal that effectively removes a range of contaminants that can impact the health of drivers.

<!——>

In a car equipped with the new improved multi-filter, the amount of “fine dust” particles smaller than 0,4 μm can be as much as 70% less than in a car without the filter, according to a standardized component test. This is a significant improvement as studies have shown that dust particles smaller than 10 µm can cause a number of health problems, including difficulty breathing and lung infections.

A new filter prevents the most microscopic, hazardous “fine dust” particles from entering the car while a sensor monitors the incoming air for noxious substances. If the outside air becomes too toxic, the vents automatically close. Click to enlarge.

Up to 45 per cent of the industrialized world’s population is now suffering from some form of allergy or hypersensitivity. Over 10 per cent has asthma. At Volvo, our commitment to safety goes well beyond safety belts and air bags. It’s about making sure that every minute you and your family spend in a Volvo is as safe as it can possibly be. That includes breathing. With this filter we are now at the forefront of the industry in terms of particle separation.

The filter is one element of Volvo’s advanced Interior Air Quality System (IAQS). Another element is a sensor that monitors the incoming air for noxious substances. If the level of harmful substances becomes too high (such as when driving through a tunnel), the car’s air intakes will automatically close. Together, the multi-filter and sensor keep out a number of harmful and irritating pollutants, including:

• NO_x
• Hydrocarbons
• Ground-level ozone
• Gases and unpleasant odors

Filtering outside air accounts for only half of CleanZone’s holistic approach to improving the driver’s environment; the other half is minimizing harmful emissions within the car.

When drivers unlock their cars by remote control, the remote cabin ventilation system automatically vents out the interior air within one minute, getting rid of odors and emissions before drivers enter.

The work to minimize interior emissions begins long before the cars are even built, with strict controls on the substances that may be used inside the cars. Volvo Cars says it is leading the industry in switching to new, less toxic materials with fewer harmful additives.

Volvo Cars has also implemented a test program to monitor and control emissions. This program includes evaluations by the Volvo Cars Nose Team, whose members smell different objects to determine if the odor is acceptable or too strong. What is known as the new car smell is actually low levels of emissions from materials. The levels do not present a danger but on hot days, concentrations that irritate hypersensitive people may occur.

Another aspect of the program is the sun simulator test, in which the car is heated until the interior reaches a temperature of 65 ˚C, simulating parking in the sun on a hot summer’s day. The emissions of Total Volatile Organic Compounds (TVOCs) and aldehydes are then measured. Volvo has a very strict limit for TVOCs, since high levels in interior air can cause headaches, nausea and dizziness, and can trigger asthma. Aldehydes are also limited because they, especially formaldehyde, can cause both respiratory and contact allergies. Nickel, another source of contact allergies when released from metallic surfaces, is also minimized.