1.Air filter's function:
    In order for the engine to normal operation, there must be plenty of pure air. If there are harmful substances in the engine air (dust, resin, aluminum oxide, acidification, such as iron) is inhaled, cylinder, piston components will increase the burden, and cylinder, piston abnormal component wear, as well as
mixing with engine oil, more substantial wear, causing deterioration of engine performance, reduced engine life, prevent engine wear. Meanwhile the air filter also have sound attenuation function. Air filters generally need to be changed when 10,000 km once, to achieve the best results.


     Type of air filter :In accordance with the principle of filter, air filter can be divided into filter type, centrifugal type, oil bath type and composite type.At present, the air filter can divided into used in oil bath air filters, dry paper air filters,
polyurethane element air filter. Inertia oil bath air filter filters three grade,it's inertia filtering,oil bath filtering and cleaning filtering.The latter two air filter are element filter. Inertia oil bath air filter's advantage is :air resistance is small, also can adapt to the dusy and sandy working environment, long lifeandsoon.Previously it is used in a variety of models of automobile and tractor engines.But this air filter's filter performance is low,heavy,cost and Maintenance of inconvenience. It is Eliminated slowly in the automobile engine. Dry paper air filter's element is used in micro-porous filter paper made of resin, porous, loose paper, folded, a certain mechanical strength and water resistance, with high filtration efficiency, simple structure, light weight, low cost, easy to maintain, and other advantages.It is used mostly in the automotive air filter.Polyurethane element air filter's eco is made of soft, porous, sponge-like polyurethane, strong adsorption capacity, this Air Purifier has the advantage of dry paper air filters, But the mechanical strength is low.It is used in car engines broadly.The latter two air filter's disadvantage is that the life is short, It isn't reliable when works under the conditions of harsh environment.

      Each air filter has it's own advantages and disadvantages, but inevitably there is contradiction between the intake and air filter efficiency. As an in-depth study of air filter, air filter demands more and more.Ther e are some new type of air filters there years.Such as Fiber element air filter, Duplex material air filter, muffler air filter, thermostatic air filter etc, to meet the needs of engine working.

     2. Cabin air filter's function:
     It is used to filter the air inside of the car compartment and compartment air circulation inside or outside . Removing in the air or dropping the car into the bus in the air of dust, odour, pollen, and other impurities, smoke to ensure the health of passengers and drop the car smell and air filter also has a difficult to spray the windshield. General requirements for cabin air filter replaced 10,000 km, to achieve the best results. Error: most people will believe that cabin air filter only works in the summer.It is used to filter into the car's air all the year round. In order to protect the health of your body, don't
overlook this small filter effects!

       Germany Hannover medical school researchers study discoveries, car air conditioning systems can be removed from outside the vehicle by more than 80% bacteria, fungal spores, and particulate matter.It is good for people with respiratory diseases and allergies. But the researchers also stressed that the subjects always has been reasonable maintenance, maintenance of the air conditioning system, air filter must bereplaced on a regular basis, (where the air filter, refers to the automobile air conditioning with air filter, which is what we usually say, car air conditioning filters, cabin air filters, air conditioning filters, cooling air filter and other popular names). They recommended that owners check the air condition system when smell a suspicious odor as soon as possible.

      Cabin air filter's cleaning method:

       If the filter is dirty, using compressed air from down to up to clean, make guns with filters to keep 5cm, and with 500kPa (kPa) after about 2 minutes.If it is still dirty,you can ask your dealer to clean.

     
     Check the time interval:

     According to the maintenance plan check and replace the air filter. In dust or heavy traffic areas may need to be replaced in advance.If the Airflow decreased significantly,filter may be blocked. Check the filter and replace if necessary. Check the filter and replace if necessary. Use air conditioning systems without filters may cause damage to your system. Do not clean with water.When you clean or replace the air filter, you must first turn off the air conditioning system.

    3. Oil filter

     As a part of the internal combustion engine, plays a very important role in the lubrication system, engine can be produced in the combustion process and metal debris, mixed with engine oil and oil gradually produce glial and other impurities in carbon to filter out. These impurities is accelerated wear of the moving parts, causing oil circuit plug, oil filters ensure the normal operation of internal combustion engine, internal combustion engine's service life significantly increased can also extend the life of other parts.

    Oil filter's filtering principle can divided into three types: Mechanicalcentrifugal separation and magnetic separation, adsorptionOil filter’s Properties:Oil filters must not only have the ability to exclude harmful impurities, but also as a lubrication system parts,must meet the requirements of the host operating, so the oil filter has its own characteristics.

    1).Flow resistance characteristics, the filter will produce different pressure before and after the certainflow, the pressure is the filter’s resistance, also is the pressure loss value, its ammount should be as small as possible. General requirements for full-flow filter in through the rated flow of the original resistance should not be greater than 0.5 kg/cm 2 or bypass valve opening pressure value of 30%.Flowresistance characteristics of filters can be tested in determination of test bench.

    2). Initial efficiency characteristics of filter must be able to filter the impurity particles of a certain number of a certain size. On the determination of its new filter efficiency, known as the original filter efficiency, (generally, in using since gradually accumulate on the surface of the filter impurities, increasingly high filtration efficiency. Thus, filter elements used throughout the lifetime of the average efficiency than original high efficiency). Determination of when the initial efficiency, particles of oil contains a certain amount of a certain size, a certain flow rate through the filter at a time, after analysis of filtering impurities in the oil, it can
calculate the original filter efficiency, if testing with various sizes of particles, it can reach different efficiency data.

     3).Life property, A new filter from the start useing to block, that is, before and after the filter differential pressure reaches filter bypass valve opening pressure values, or the number of engine operating hours or vehicle mileage, called a filter life, (a life). Determination of the characteristics of the test bench, need to continue to join clogging impurities in testing oil, clogging the filters under actual use conditions faster. During the test, timed record before and after the filter differential pressure, when the differential pressure
reaches the bypass valve opening pressure value, test is terminated. To then weizhi of hours number or has joined of test impurities total, is as evaluation filter device life of index, in life test in the, also can scheduled
determination filter device of filter efficiency, called cumulative filter efficiency, representative filter device in plug process in the filter efficiency of changes, in rated of flow Xia, filter device of life is as follows: ideal of oil filter device should is flow large, resistance small, filter efficiency high, life long. But in fact, is the interaction of individual characteristics, as the flow resistance will go up; Filters fast is quite often accompanied by increased resistance, short life disadvantages

4. Fuel filter(Gasoline filter,diesel filter)Function:

    Fuel filter is to filter fuel (petrol, diesel) that engine needs to Combuste, preventing fuel from foreign bodies such as dust, metal powder, water organisms into the engine to prevent engine wear, as well as for oil system of blocking oil filter.