Sunday, July 27, 2008

Air Filters


What is Air Filter?
It is a device to which Filters solid particles like dust, pollen, mold and bacteria from air. it is a device which been used in engines and in other machine that need to produce clean air.

What is the purpose of Air Filter in our Cars?
Gasoline Engine needs air to burn fuel and Diesel Engine need air to compress air to produce heat.

Cabin Air filter
A typical pleated paper filter that is placed in the outside air intake of the cars. Clogged or dirty air filters can significantly reduce air flow from the cabin vents as well as introduce allergens into the cabin air system.


Internal Combustion Air filters
A filter which prevents abrasive particle matter from entering the engine's cylinders, where it would cause mechanical wear and oil contamination.

For Fuel injected vehicle:A pleated paper filter element in the form of a flat panel which is placed inside the plastic box connected to the throttle body with an intake tube.

For Carburetors
Used an cylindrical or round air filters. This is position in top of the carburetors and usually it is made of metal or plastic container.

Types of Air filter materials

Paper
Paper filter elements are nearly exclusive choice for engine air filters, because they are efficient, easy to change and cost effective.

Foam
Oil based polyurethane foam elements are used in some after market air filters. Foam was widely used filter in small engines and other equipment. Foam filter can offer minimal airflow restriction and very high in dirt capacity, but a popular choice for motor sport and off road rally where high level dust will encounter.

Cotton
Oil cotton gauze are small number of after market air filters as high performance items.

Oil bath
It is a round base bowl containing a pool of oil and round insert which is filled of fiber, mesh, foam and another coarse filter media. oil bath air filters are very used in small engines application. but the maintenance of the air filter is messy due to oil and dirt.










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