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Fuel feed system in
petrol enigine
Presentation
by
G. JAGADEESKUMAR
JTO/MMV GOVT ITI
DHARMAPURI
 The main purpose of the fuel feed system is
to control the fuel supply to the engine.
 To supply the fuel from the fuel tank to the
engine cylinders.
 Gravity fuel Feed system
 AIR Pressurized fuel Feed system
 Vacuum fuel Feed system
 Pump fuel Feed system
 Fuel injection fuel Feed system
 The ‘gravity system’ is confined to smaller
vehicles such as entry-level two-wheelers,
bikes, and quads only. In this design, the
engineers mount the fuel tank at the highest
position.
 It feeds the fuel into the carburetor float
chamber by gravity. This system has a very
simple design and hence, cheaper to produce
and maintain. However, the disadvantage is
that you need to place the fuel tank over the
carburetor for this system to work correctly.
Fuel feed system in petrol engine ppt
 In this system, an airtight fuel tank is used
and is placed under the seat or near the
engine.
 the hand operated a pump or mechanically
operated pump supplies the high-pressure
air to the fuel tank for supply the fuel to the
carburetor.
Fuel feed system in petrol engine ppt
 This system uses engine suction pressure to
suck the fuel from the main tank to an
auxiliary tank
 The fuel flows to the carburetor float
chamber by gravity.
 This system is now obsolete.
 Most present-day cars use this system. This
system uses a steel pipe to supply the petrol to
the fuel pump which then pumps it into
the carburetor float chamber thru’ flexible pipe.
 If it is a mechanical fuel pump, then it gets the
drive from the engine camshaft. Hence, it is
attached to the engine. On the other hand,
electrically operated fuel pumps can be placed
anywhere. So, manufacturers place it inside the
fuel tank to reduce the chance of vapor-lock.
Fuel feed system in petrol engine ppt
 Modern/present-day vehicles use petrol
injection system which replaced the
carburetor. The injector nozzle atomizes the
fuel and forces it into the air stream. Newer
generation engines use separate injector for
each cylinder. The air-fuel mixture for
different load and speed conditions is
controlled either mechanically or
electronically. Hence, this makes the fuel
system more accurate. For more information,
read about the EFI, MPFI & GDi.
 Modern/present-day vehicles use petrol
injection system which replaced the
carburetor. The injector nozzle atomizes the
fuel and forces it into the air stream. Newer
generation engines use separate injector for
each cylinder. The air-fuel mixture for
different load and speed conditions is
controlled either mechanically or
electronically. Hence, this makes the fuel
system more accurate. For more information,
read about the EFI, MPFI & GDi.
 Fuel tank
 Filters
 Fuel pump
 Fuel lines
 Carburetor or injectors
 Engine-management system
 Fuel gauge
 The fuel tank holds the fuel for the engine its imade up of stee or
aluminium or synthetic rubber components and fibre reinforced
plastics which are flame resistant
 The tank are coated with lead-tin alloy to protect the tank from the
corrosion effect
Filter made up of paper
or ceramic element
 Fuel filter is placed
between petrol feed
pump and carburettor
 A fuel filter is a filter
in the fuel line that
screens out dirt and
rust particles from the
fuel, normally made
into cartridges
containing a filter
paper
Fuel feed system in petrol engine ppt
Fuel feed system in petrol engine ppt
Fuel feed system in petrol engine ppt
 A fuel line is a hose used to bring fuel from
one point in a vehicle to another or from a
storage tank to a vehicle. It is
commonly made of reinforced rubber to
prevent splitting and kinking.
 The main function of carburetors to mix air
and gasoline and provides a high combustion
mixture.
 It controls the engine speed. It also regulates
the air-fuel ratio.
 Increase or decrease the amount of mixture
according to the engine speed and load
changing
Fuel feed system in petrol engine ppt
Fuel feed system in petrol engine ppt
 The function of a carburetor is to vaporize the
petrol (gasoline) by means of engine suction and
to supply the required air and fuel (petrol)
mixture to the engine cylinder.
 During the suction stroke, air flows from
atmosphere into the cylinder. As the air passes
through the venturi, velocity of air increases and
its pressure falls below the atmosphere.
 The pressure at the nozzle tip is also below the
atmospheric pressure. The pressure on the fuel
surface of the fuel tank is atmospheric. .
 Due to which a pressure difference is created,
which causes the flow of fuel through the fuel
jet into the air stream.
 As the fuel and air pass ahead of the venturi,
the fuel gets vaporized and required uniform
mixture is supplied to the engine
 Note
◦ Automization
◦ Evaporation
◦ Carburation (homogeneous mixture)
◦ Carburettor popping due to back fire of lean mixing
Fuel feed system in petrol engine ppt
 Float circuit
 Starting circuit
 Idling circuit and slow speed
circuit
 Main/high speed circuit
 Acceleration pump circuit
 Econostat circuit
Fuel feed system in petrol engine ppt
 Separate circuit for different, scanario like
starting circuit, idling,acceleration..
 Esee of starting the Bi starer helps to cold
starting of the vehicle
 Throttle responds increase
 Solex carburettor has an additional pump
circuit for suddern acceleration requirement
 Easily change flow rate of air fuel ratio.
Fuel feed system in petrol engine ppt
Fuel feed system in petrol engine ppt

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Fuel feed system in petrol engine ppt

  • 1. Fuel feed system in petrol enigine Presentation by G. JAGADEESKUMAR JTO/MMV GOVT ITI DHARMAPURI
  • 2.  The main purpose of the fuel feed system is to control the fuel supply to the engine.  To supply the fuel from the fuel tank to the engine cylinders.
  • 3.  Gravity fuel Feed system  AIR Pressurized fuel Feed system  Vacuum fuel Feed system  Pump fuel Feed system  Fuel injection fuel Feed system
  • 4.  The ‘gravity system’ is confined to smaller vehicles such as entry-level two-wheelers, bikes, and quads only. In this design, the engineers mount the fuel tank at the highest position.  It feeds the fuel into the carburetor float chamber by gravity. This system has a very simple design and hence, cheaper to produce and maintain. However, the disadvantage is that you need to place the fuel tank over the carburetor for this system to work correctly.
  • 6.  In this system, an airtight fuel tank is used and is placed under the seat or near the engine.  the hand operated a pump or mechanically operated pump supplies the high-pressure air to the fuel tank for supply the fuel to the carburetor.
  • 8.  This system uses engine suction pressure to suck the fuel from the main tank to an auxiliary tank  The fuel flows to the carburetor float chamber by gravity.  This system is now obsolete.
  • 9.  Most present-day cars use this system. This system uses a steel pipe to supply the petrol to the fuel pump which then pumps it into the carburetor float chamber thru’ flexible pipe.  If it is a mechanical fuel pump, then it gets the drive from the engine camshaft. Hence, it is attached to the engine. On the other hand, electrically operated fuel pumps can be placed anywhere. So, manufacturers place it inside the fuel tank to reduce the chance of vapor-lock.
  • 11.  Modern/present-day vehicles use petrol injection system which replaced the carburetor. The injector nozzle atomizes the fuel and forces it into the air stream. Newer generation engines use separate injector for each cylinder. The air-fuel mixture for different load and speed conditions is controlled either mechanically or electronically. Hence, this makes the fuel system more accurate. For more information, read about the EFI, MPFI & GDi.  Modern/present-day vehicles use petrol injection system which replaced the carburetor. The injector nozzle atomizes the fuel and forces it into the air stream. Newer generation engines use separate injector for each cylinder. The air-fuel mixture for different load and speed conditions is controlled either mechanically or electronically. Hence, this makes the fuel system more accurate. For more information, read about the EFI, MPFI & GDi.
  • 12.  Fuel tank  Filters  Fuel pump  Fuel lines  Carburetor or injectors  Engine-management system  Fuel gauge
  • 13.  The fuel tank holds the fuel for the engine its imade up of stee or aluminium or synthetic rubber components and fibre reinforced plastics which are flame resistant  The tank are coated with lead-tin alloy to protect the tank from the corrosion effect
  • 14. Filter made up of paper or ceramic element  Fuel filter is placed between petrol feed pump and carburettor  A fuel filter is a filter in the fuel line that screens out dirt and rust particles from the fuel, normally made into cartridges containing a filter paper
  • 18.  A fuel line is a hose used to bring fuel from one point in a vehicle to another or from a storage tank to a vehicle. It is commonly made of reinforced rubber to prevent splitting and kinking.
  • 19.  The main function of carburetors to mix air and gasoline and provides a high combustion mixture.  It controls the engine speed. It also regulates the air-fuel ratio.  Increase or decrease the amount of mixture according to the engine speed and load changing
  • 22.  The function of a carburetor is to vaporize the petrol (gasoline) by means of engine suction and to supply the required air and fuel (petrol) mixture to the engine cylinder.  During the suction stroke, air flows from atmosphere into the cylinder. As the air passes through the venturi, velocity of air increases and its pressure falls below the atmosphere.  The pressure at the nozzle tip is also below the atmospheric pressure. The pressure on the fuel surface of the fuel tank is atmospheric. .
  • 23.  Due to which a pressure difference is created, which causes the flow of fuel through the fuel jet into the air stream.  As the fuel and air pass ahead of the venturi, the fuel gets vaporized and required uniform mixture is supplied to the engine  Note ◦ Automization ◦ Evaporation ◦ Carburation (homogeneous mixture) ◦ Carburettor popping due to back fire of lean mixing
  • 25.  Float circuit  Starting circuit  Idling circuit and slow speed circuit  Main/high speed circuit  Acceleration pump circuit  Econostat circuit
  • 27.  Separate circuit for different, scanario like starting circuit, idling,acceleration..  Esee of starting the Bi starer helps to cold starting of the vehicle  Throttle responds increase  Solex carburettor has an additional pump circuit for suddern acceleration requirement  Easily change flow rate of air fuel ratio.