Skip to main content

FUEL FILTER ( PETROL ) AND ITS WORKING TECHNOLOGY

 Dirt in fuel causes poor engine performance and prevents normal operation of fuel pump and carburetor. The fuel is filtered when it enters the fuel tank. In some cases, it is again filtered in fuel pump. A separate fuel filter is also connected between the fuel pump and carburetor. It serves to catch any water or unit. The fuel will enter the glass bowl from the inlet and passes through the ceramic filter. It separates the foreign particles. The water and sediments are collected in the bowl and removed during cleaning.

 



DIESEL FUEL FILTERS :

Fuel filters are used before the fuel enters the fuel injection pump and injectors. The plungers and barrels of the injection pump , needles and nozzles of the injectors are made with close tolerance. Even a very minute dust will wear these parts. It is , therefore , quite essential that the fuel should be well filtered before it is fed to injector pump and injectors. Hence two filters are used for filtering diesel. They are primary filter and secondary filter.


i) Primary Filter ( Pre Filter ) : 

The primary fuel filter removes water and coarse dust. Generally, sedimentation type is used. It has conical diffuser and sediment chamber. 

The fuel enters the filter and flows around the conical diffuser funnel to accelerate downwards to the sediment chamber.

As the impurities are heavier, they move downwards and settle down due to slow movement of fuel in the chamber. Then the settled impurities are drained off periodically. 

ii) Secondary Filter :

The secondary filter is fitted after the feed pump and it separates out abrasive particle and any water in the fuel. These filters have elements of  impregnated paper, ceramic metal disc and fiber . The fine pores of the filter element retain the minute particles except water droplets which are forced through element.

However, as they have passes the element , electrostatic attraction produced by the resin impregnated element causes the droplets to be pulled towards each other and continues to form larger droplets. Since the droplets are heavier, they are settled down in the chamber.


Labels:

Comments

Post a Comment

Popular posts from this blog

SIMPLE CARBURETOR - CONSTRUCTION AND WORKING

CONSTRUCTION OF SIMPLE CARBURETOR :  The main Components of Simple Carburetor are : Float Chamber, float, nozzle, venturi, throttle valve, inlet valve, and metering jet . In the float chamber, a constant level of petrol is maintained by the float and a needle valve.  The float chamber is ventilated to atmosphere.  This is used to maintain atmospheric pressure inside the chamber. The float which is normally a metallic hollow cylinder rises and closes the inlet valve as the fuel level in the float chamber increases to certain level. The mixing chamber contains venturi, nozzle and throttle valve. The venturi tube is fitted with the inlet  manifold. This tube has a narrow opening called venturi. A nozzle is provided just below the centre of this venturi. The nozzle keeps the same level of petrol as that of the level in the float chamber. The mixing chamber has two butterfly valves.  One is to allow air into the mixing chamber known as choke valve. The other is to al...
Post a Comment
Read more

MELTING FURNACES FOR FERROUS METALS : CUPOLA AND ITS WORKING

Various types of melting furnaces are used in different foundry shops, depending upon the quantity of metal to be melted at a time, and the nature of work that is carried out in the shop.  The primary objective in cupola is to produce iron of desired composition, temperature and properties at the required rate in the most economical manner. Besides, this furnace has many distinct advantages over the other types, e.g., simplicity of operation, continuity of production, and increased output coupled with a high degree of efficiency.  Description Of a Cupola : The Cupola Furnace consists of a vertical, cylindrical steel sheet, 6 to 12 mm thick, and lined inside with acid refractory bricks or acid tamping clay. The refractory bricks or the tamping clay used consist of  silicon oxide acid (SiO2) and alumina (Al2O3). The lining is generally thicker in the lower where the temperatures encountered are higher than in the upper region. The shell is mounted either on a brick work fo...
Post a Comment
Read more

Advantages And Disadvantages Of Air Refrigeration System :

 Advantages Of  Air Refrigeration : 1. The refrigerant used namely air is cheap and easily available. 2. There is no danger of fire or toxic effects due to leakages. 3. The weight to ton of refrigeration ratio is less as compared to other systems. Disadvantages Of Air Refrigeration : 1. The quantity of  Refrigerant used per ton of refrigeration is high as compared to other systems. 2. The COP of the system is very low. Therefore running cost is high. 3. The danger of frosting at the expander valves is more as the air contains moisture content. 
Post a Comment
Read more