Page 115 - Mechanic Diesel - TT

MECHANIC DIESEL - CITS

Introduction: In I.C (Internal Combustion) engine use a petrol engine for light motor vehicle. There are also use
combustion due to the compact size of petrol engine there are also some different type use supply system of fuel
in engine. Petrol fuel supply system typically consists of such kind a different types of components like fuel tank,
fuel pump, fuel filter, fuel injector (in fuel-injected engines), spark plug and fuel lines. The pump drawn fuel from
the tank and sends it to the engine, where it mixes with air and is ignited for combustion. The system ensures the
proper amount of fuel is delivered to the engine at all times for optimal performance.
The fuel supply system in a petrol engine comprises various components that work together to transfer set
amount of fuel from a car fuel tank to it is engine for combustion.
Petrol fuel supply system componentes
Air cleaner

Air cleaner cleans the air as we know that air contain lot of minor particles of dust and dirt so if these entre in the
engine having contents of mud and sand etc. It will work as emery when entre in cylinder piston, piston rings etc.
thus wear parts faster and make the life of engine shorter. Air filter traps the dust from incoming air and does not
allow it to go to cylinder so parts of engine do not wear fast. It also reduces the hissing sound produced by fasting
moving of air to intake pipe. In petrol vehicles, it does not allow the fine ball (flame) caused due to back-firing to
come out of intake system and save from fire.
Fuel tank

It is a type of tank made of iron sheet which is fixed with chassis of motor vehicles with the help of nuts and bolts.
From where the connection of petrol pipe is taken, many time a brass mesh in glass shape is fitted inside the tank
so that petrol can be purified before going to pump through pipe. A small pit is designed below the tank to fix a plug
inside it so that to transfer petrol as and when required and during cold season air inside the tank become water
after condensing. Thus water assemble in this pit so water should be removed by opening the plug.
There are one or two compartments inside of the tank and these are connected with each other by holes. These
are so fixed that are running of vehicle petrol tank should not strike with each other.
A mouth type shape is made over the tank by which an air is entered in that space thus a vent pipe is attached by
which an air enters in the tank. Many vehicles have it is provision inside the tank cap.

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CITS : Automotive - Mechanic Diesel - Lesson 29 & 30