Zagazig UniversityZagazig UniversityFaculty of EngineeringFaculty of EngineeringMechanical power DeptMechanical power Dept . .

DEISEL INJECTION SYSTEMDEISEL INJECTION SYSTEM

Prof.Dr/ Saad Abdel Prof.Dr/ Saad Abdel HameedHameed

Group WorkGroup Work

11 - -Ashraf Abd el Rsheed BarghotAshraf Abd el Rsheed Barghot 22 - -Mahmoud Mohamed Awad GoudaMahmoud Mohamed Awad Gouda

33 - -Ismail Ahmad Abd el RahmanIsmail Ahmad Abd el Rahman 44 - -Waled Rezk Mohamed ElfgalWaled Rezk Mohamed Elfgal 55 - -Mahmoud Gouda Abd el BakyMahmoud Gouda Abd el Baky

66 - -Mohamed Abd el Asalam OmarMohamed Abd el Asalam Omar 77--Mahmoud Ahmad MostafaaMahmoud Ahmad Mostafaa

Fourth year Mech.Power Fourth year Mech.Power 20102010

Fuel Tank DescriptionFuel Tank Description

As your car or trucks fuel tank ages, it becomes that As your car or trucks fuel tank ages, it becomes that much more important to make regular inspection of much more important to make regular inspection of its condition a part of your usual maintenance routine. its condition a part of your usual maintenance routine. While, obviously, an accident or other driving mishap While, obviously, an accident or other driving mishap in which your gas tank takes a direct hit can lead to in which your gas tank takes a direct hit can lead to the need to replace it due to fuel leakage, it is far the need to replace it due to fuel leakage, it is far more common to have to change your fuel tank more common to have to change your fuel tank because of leaking caused by corrosion. While the because of leaking caused by corrosion. While the rust resistant coating that your fuel tank came with is rust resistant coating that your fuel tank came with is able to offer protection for a good long time, it cannot able to offer protection for a good long time, it cannot

do it foreverdo it forever . .

Theory of operation of Gear PumpTheory of operation of Gear Pump

As the gears rotate they separate on the intake As the gears rotate they separate on the intake side of the pump, creating a void and suction side of the pump, creating a void and suction which is filled by which is filled by fluidfluid. The fluid is carried by the . The fluid is carried by the gears to the discharge side of the pump, where the gears to the discharge side of the pump, where the meshing of the gears displaces the fluid. The meshing of the gears displaces the fluid. The mechanical clearances are small—on the order of mechanical clearances are small—on the order of a thousandth of an inch (micrometers). The tight a thousandth of an inch (micrometers). The tight clearances, along with the speed of rotation, clearances, along with the speed of rotation, effectively prevent the fluid from leaking effectively prevent the fluid from leaking backwards.backwards.

The rigid design of the gears and housing allow for The rigid design of the gears and housing allow for very high pressures and the ability to pump highly very high pressures and the ability to pump highly viscousviscous fluids fluids..

Gear pumpGear pump

Fuel filterFuel filter A A Fuel filterFuel filter which is placed within the fuel pipes which is placed within the fuel pipes

or hoses coming from the or hoses coming from the Fuel tankFuel tank or or Fuel pumpFuel pump. . It is made of pleated paper or nylon mesh and It is made of pleated paper or nylon mesh and encased in a transparent plastic or glass housing. encased in a transparent plastic or glass housing. To install it, a segment of the fuel line is cut and To install it, a segment of the fuel line is cut and removed. The filter is inserted to replace the removed. The filter is inserted to replace the

removed segment of the fuel lineremoved segment of the fuel line . .

Filter insideFilter inside

Oil filterOil filter

The oil filter used to the remove a segment of the The oil filter used to the remove a segment of the fuel and change the oil of colourfuel and change the oil of colour..

Problem of the Oil FilterProblem of the Oil Filter

high temperaturehigh temperature Increase the noise in the engineIncrease the noise in the engine

Injector OperationInjector Operation

Injectors include a precision-ground needle valve Injectors include a precision-ground needle valve and are controlled by an electro-magnetic solenoid and are controlled by an electro-magnetic solenoid that is turned on and off by an electric control that is turned on and off by an electric control unit. Fuel is injected only during the "on" time unit. Fuel is injected only during the "on" time and is metered by the size of the opening, duration and is metered by the size of the opening, duration of "on" time, and fuel pressure.of "on" time, and fuel pressure.

Types of injectorTypes of injector..

Denso side feed (Toyota MR2 Turbo)