PROJECT REPORTPROJECT REPORT
FUEL INJECTION SYSTEMFUEL INJECTION SYSTEMOF DIESEL ENGINESOF DIESEL ENGINES
PROJECT GUIDE : PROJECT GUIDE : Mrs. PRATIBHA KUMARIMrs. PRATIBHA KUMARI
PRESENTED BYPRESENTED BYMohd.ShoebMohd.Shoeb
Anupam MunjalAnupam MunjalRadhika YadavRadhika Yadav
NEED AND SCOPENEED AND SCOPE
To provide a working model To provide a working model ofof
FUEL INJECTION SYSTEM FUEL INJECTION SYSTEM FOR DIESEL ENGINEFOR DIESEL ENGINE
for the automobile lab of for the automobile lab of mechanical engineering mechanical engineering
department,KIET.department,KIET.This model will help the This model will help the
students to gain a practical students to gain a practical knowledge about actual knowledge about actual working process of a fuel working process of a fuel injection system in diesel injection system in diesel
engine.engine.
INTRODUCTIONINTRODUCTION
THE INJECTION SYSTEM IN DIESELTHE INJECTION SYSTEM IN DIESEL ENGINES CAN BE OF TWO TYPES:ENGINES CAN BE OF TWO TYPES: 1. AIR INJECTION.1. AIR INJECTION. 2. AIRLESS INJECTION.2. AIRLESS INJECTION. IN IN AIR INJECTION SYSTEMAIR INJECTION SYSTEM THE DIESEL IS THE DIESEL IS
INJECTED ALONG WITH THE COMPRESSED INJECTED ALONG WITH THE COMPRESSED AIR WHEREAS INAIR WHEREAS IN
AIRLESS INJECTION SYSTEMAIRLESS INJECTION SYSTEM ONLY ONLY THE LIQUID DIESEL IS INJECTED INTOTHE LIQUID DIESEL IS INJECTED INTO THE CYLINDER.THE CYLINDER.
MAIN COMPONENTSMAIN COMPONENTS THE MAIN COMPONENTS USED IN THETHE MAIN COMPONENTS USED IN THE MODEL ARE:MODEL ARE: FUEL TANKFUEL TANK FEED VALVEFEED VALVE PLUNGER TYPE PUMPPLUNGER TYPE PUMP PRESSURE GUAGEPRESSURE GUAGE FUEL INJECTORFUEL INJECTOR NOZZLENOZZLE
BLOCK DIAGRAMBLOCK DIAGRAM
FUELTANK
FUELPUMP
FEED VALVE
PRESSUREGUAGE
PLUNGER TYPE
NOZZLE
FUEL SPRAY
INTO
CYLINDER
Maruti 800Maruti 800 28 28 litersliters
Skoda Skoda lauralaura
55 55 litersliters
Mercedes Mercedes c-classc-class
62 62 litersliters
Tata indicaTata indica 37 37 litersliters
FUEL TANK CAPACITYFUEL TANK CAPACITY
FUEL INJECTION PUMPFUEL INJECTION PUMP
A FUEL INJECTION PUMP IS USED TOA FUEL INJECTION PUMP IS USED TO TO SUPPLY PRECISELY METERED TO SUPPLY PRECISELY METERED
QUANTITY OF DIESEL UNDER HIGH QUANTITY OF DIESEL UNDER HIGH PRESSURE TO THE INJECTORS AT WELL PRESSURE TO THE INJECTORS AT WELL
TIMED INSTANTS. TIMED INSTANTS.
TYPES OF FUEL INJECTION TYPES OF FUEL INJECTION PUMPSPUMPS
1.VARIABLE SPILL AND VARIABLE 1.VARIABLE SPILL AND VARIABLE STOKE TYPESSTOKE TYPES
2.SINGLE CYLINDER(PLUNGER) AND 2.SINGLE CYLINDER(PLUNGER) AND MULTI CYLINDER(PLUNGER) TYPESMULTI CYLINDER(PLUNGER) TYPES3.JERK PUMP TYPE AND DISTRIBUTOR 3.JERK PUMP TYPE AND DISTRIBUTOR TYPETYPE4.CAM OPERATED IN LINE PLUNGER 4.CAM OPERATED IN LINE PLUNGER
TYPE AND ROTARY DISTRIBUTOR TYPE AND ROTARY DISTRIBUTOR TYPETYPE
FUEL INJECTION PUMPFUEL INJECTION PUMP(MULTI CYLINDER)(MULTI CYLINDER)
(courtesy of “www.alibaba.com”)(courtesy of “www.alibaba.com”)
FUEL INJECTORFUEL INJECTOR A FUEL INJECTOR IS USED TO INJECT A FUEL INJECTOR IS USED TO INJECT
THE FUEL IN THE CYLINDER IN ATOMISED THE FUEL IN THE CYLINDER IN ATOMISED FORM AND IN PROPER QUANTITY. FUEL FORM AND IN PROPER QUANTITY. FUEL INJECTORS ARE AVAILABLE IN SEVERAL INJECTORS ARE AVAILABLE IN SEVERAL DESIGNS.MAIN COMPONENTS OF FUEL DESIGNS.MAIN COMPONENTS OF FUEL INJECTORS ARE : NOZZLE INJECTORS ARE : NOZZLE
VALVEVALVE BODYBODY SPRING SPRING The nozzle is its main part which is The nozzle is its main part which is
attached to the nozzle holder. Entry of fuel in attached to the nozzle holder. Entry of fuel in the injector is from the fuel injection pump. the injector is from the fuel injection pump.
FUEL INJECTION FUEL INJECTION LOCATIONLOCATION
FIRING FUEL INJECTORFIRING FUEL INJECTOR
INJECTION NOZZLESINJECTION NOZZLES The nozzle is the main part of injector The nozzle is the main part of injector
which is attached to the nozzle holder. which is attached to the nozzle holder. There are two types of nozzle:There are two types of nozzle:
1. Closed 1. Closed 2. Open 2. Open
The distinction being according to whether The distinction being according to whether the injection pressure is controlled by a the injection pressure is controlled by a spring loaded needle valve or whether spring loaded needle valve or whether valve is dispensed with. Open nozzles valve is dispensed with. Open nozzles
are not much used these days.are not much used these days.
TYPES OF NOZZLETYPES OF NOZZLE The closed type injection nozzles may be The closed type injection nozzles may be
classified into following types:classified into following types:1.1. Hole type: single hole type and multiple Hole type: single hole type and multiple
hole typehole type2.2. Pintle typePintle type3.3. Pintaux typePintaux type4.4. Long stem typeLong stem type5.5. Delayed action typeDelayed action type6.6. Throttle typeThrottle type
VCOVCO FUEL INJECTION FUEL INJECTION NOZZLENOZZLE
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