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Chapter 3 Fuel Injection Equipment
12. Fuel Injection Nozzle
, 4LHA Series
12. Fuel Injection Nozzle
When fuel oil pumped by the fuel injection pump reaches
the injection nozzle, it pushes up the nozzle valve (held
down by spring), and is injected into the combustion
chamber at high pressure.
The fuel is atomized by the nozzle to mix uniformly with the
air in the combustion chamber. How well the fuel is mixed
with high temperature air directly affects combustion effi-
ciency, engine performance and fuel economy.
Accordingly, the fuel injection nozzles must be kept in top.
condition to maintain performance and operating efficien-
cy.
12-1 Functioning of fuel injection nozzle
Fuel from the fuel injection pump passes through the oil
port in the nozzle holder, and enters the nozzle body
reservoir.
When oil reaches the specified pressure, it pushes up the
nozzle valve (held by the nozzle spring), and is injected
through the small hole on the tip of the nozzle body.
The nozzle valve is automatically pushed down by the
nozzle spring and closed after fuel is injected.
Oil that leaks from between the nozzle valve and nozzle
body goes from the hole on top of the nozzle spring
through the oil leakage fitting and back into the fuel tank.
Adjustment of injection starting pressure is effected with
the adjusting shims.
(1) Hole type fuel injection nozzle
Applicable engine model-
I. D. mark
F.O. return pipe joint
- Nozzle cover mounting groove
Nozzle holder
- Fuel starting pressure adjusting shim
Positioning pin-
- Nozzle spring
- Nozzle spring seat
-Stop plate
izzle valve
— Nozzle
Nozzle holder
Fuel starting pressure
Adjusting shim
Nozzle spring
Nozzle spring seat
Nozzle valve
Nozzle body
Hole
F.O. reservoir
:zlebodyJ
Nozzle clamp nut
F.O. return pipe joint
Nozzle cover
Positioning pin
Stop plate
Nozzle clamp nut
Nozzle valve
Nozzle body
Injection hole
Spray angle
3-1-59
Summary of Contents for 4LHA-DTP
Page 79: ...Y00R4782 2 Fig fc GEAR HOUSING REFER TO F i g l REFER TO F i g 2 8 2 9 7 EFER TO Fi g 5 ...
Page 81: ...Y00R4782 FLYWHEEL HOUSING 4LHA STZE P 4LHA DTZE P 4LHA HTZE P 13 1 4 ...
Page 87: ...Y00R4782 LUB OIL S U M P 9 7 7 7 7 o 1 01 21 2 N 4LHA HTE P 4LHA HTZE P OPTIONAL 12 ...
Page 89: ...Y0OR4782 OIL SEAL HOUSING REFER TO Fig 1 ...
Page 101: ...Y00R4782 Fig j 2 RåV Tfc JI K S U C T I O N M A N I F O L D ...
Page 107: ...Y00R4782 Fig CAMSHAFT DRIVING GEAR ...
Page 109: ...Y00R4782 Fig 1 C e 4LHA ST Z E P I O TURBOCHARGER 4LHA ST Z E P REFER TO F i g 1 3 ...
Page 111: ...Y00R4782 r 1 ft t y 4LHA DT Z E P F i g l O TURBOCHARGER 4LHA DT Z E P REFER TO F i g 1 3 ...
Page 113: ...Y00R4782 1 7 fcf 4LHA HT Z E P Fig I I T U R B O C H A R G E R 4LHA HT Z E P ...
Page 115: ...Y00R4782 Fig 18 ftiB M I X I N G E L B O W E X H A U S T B E N D 5 ...
Page 117: ...Y00R4782 Fig 18 1 5 E W K M I X I N G E L B O W E X H A U S T B E N D 5 ...
Page 121: ...Y00R4782 Fig I W AIR COOLER 4 L H A H T E P 4 L H A H T Z E P REFER TO F i g 24 ...
Page 127: ...Y00R4782 F i g t C LUB OIL COOLER REFER TO F i g 1 9 FLYWHEEL SIDE ...
Page 131: ...Y00R4782 Fig 24 LUB OIL SYSTEM REFER TO Fi g 2 4LHA STZE P 4LHA DTZE P REFER TO Fi g 6 ...
Page 135: ...Y00R4782 Fig C O LUB OIL PIPE TURBOCHARGER REFER TO F i g 1 5 1 6 1 7 ...
Page 137: ...Y00R4782 Fig 27 MMM V LUB OIL PIPE COOLER REFER TO F i g 22 a 7 f O U T L O STRAINER OUT ...
Page 139: ...Y00R4782 Q Q m y7 m 4LHA ST DT Z E P Fi g O C S W P U M P 4LHA ST DT Z E P ...
Page 141: ...Y00R4782 OQ ymxy 4LHA HT Z E P Fi g fc 57 C S W P U M P 4LHA HT Z E P ...
Page 143: ...Y00R4782 Fig COOLING FRESH W A T E R P U M P REFER TO F i g 62 ...
Page 145: ...Y00R4782 Fig 31 mo z 4LHA ST DT Z E P C F W COOLER 4LHA ST DT Z E P 5 f fc f ui FLYWHEEL SIDE ...
Page 149: ...Y00R4782 Q Q mMW 4LHA STE DTE P Fi g O O C S W PIPE 4LHA STE DTE P REFER TO F i g 3 1 ...
Page 155: ...Y00R4782 g g nm uy m 4LHA HT Z E P C S W PIPE 4LHA HT Z E P REFER TO F i g 32 11 12 SIED PART ...
Page 157: ...Y00R4782 Fig o e nmiuy 4LHA ST DT Z E P O D C F W PI PE 4LHA ST DT Z E P ...
Page 159: ...Y00R4782 Fig Q 7 JMP W7 I 4LHA HT Z E P O f C F W PIPE 4LHA HT Z E P REFER TO F i g 2 3 ...
Page 161: ...Y00R4782 Fi g Q O C S W STRAINER OPTIONAL c s w PUMP KINGSTON C O C K ...
Page 167: ...Y00R4782 4 1 mmxyy 4LHA ST DT Z E P I FUEL INJECTION P U M P 4LHA ST DT Z E P ...
Page 173: ...Y00R4782 ...
Page 175: ...Y00R4782 ...
Page 177: ...Y00R4782 43 M t GOVERNOR ...
Page 179: ...Y00R4782 Å A JWD f Ktfxr Fig F U E L F E E D P U M P REFER TO Fig 41 ...
Page 187: ...Y00R4782 Fig A O rø W7 4LHA ST DT Z E P H O FUEL PIPE 4LHA ST DT Z E P ...
Page 189: ...Y00R4782 Fig A Q miUy 4LHA ST DT Z E P f O FUEL PI PE 4LHA ST DT Z E P ...
Page 193: ...Y00R4782 Fig C n B7 f 4LHA ST DT Z E P U U FUEL STRAINER 4LHA ST DT Z E P ...
Page 195: ...Y00R4782 Fig K 1 TO7 i 4LHA HT Z E P w I FUEL STRAINER 4LHA HT Z E P REFER TO F i g 12 ...
Page 197: ...Y00R4782 Fig 52 OIL WATER SEPARATER OPTIONAL 19 mv t 9 14 F R O M FUEL TANK ...
Page 203: ...Y00R4782 F i g O O P O W E R STEERING P U M P C F W P U M P ...
Page 205: ...Y00R4782 Fig UU P O W E R S T E E R I N G C O O L E R T A N K 1 6 ...
Page 207: ...Y00R4782 57 ATFA f Fig O I ATF PIPE REFER TO F i g 5 6 FER TO F i g 5 5 ...
Page 211: ...Y00R4782 Fifl W O STARTING MOTOR REFER TO F i g 3 ...
Page 213: ...Y00R4782 GENERATOR REFER TO Fig 2 ...
Page 215: ...Y00R4782 Fig D I GENERATOR OPTIONAL REFER TO F i g 30 REFER TO F i g 60 ...
Page 221: ...Y00R4782 Fl g O O SENSOR MOUNT ...
Page 223: ...Y00R4782 H E A T E R P L U G O P T I O N A L 4 L H A H T E P 4 L H A H T Z E P ...
Page 225: ...Y00R4782 Fig OO I N S T R U M E N T P A N E L B T Y P E O P T I O N A L ...
Page 227: ...Y00R4782 Fig NSTRUMENT PANEL C TYPE OPTIONAL ...
Page 229: ...Y00R4782 66 Fig OO I N S T R U M E N T P A N E L C T Y P E O P T I O N A L ...
Page 231: ...Y00R4782 Fig 67 4 0 INSTRUMENT PANEL D TYPE OPTIONAL ...
Page 233: ...Y00R4782 Fig 67 N S T R U M E N T P A N E L D T Y P E O P T I O N A L ...
Page 235: ...Y00R4782 Fig 6 8 T O O L ...
Page 237: ...Y00R4782 Fig D Ø GASKET SET OPTIONAL 1 A ...
Page 302: ...Example of setup with HSW630A1 Hurth marine gear WATER INLET IS M l o 3 0 WATER INLET 2 3 ...
Page 303: ...Chapter 1 General 5 Dimensions i4LHA Series 4LHA STZE STZP 9 96 XVW 9 06 um 1 18 ...
Page 305: ...Chapter 1 General 5 Dimensions 4LHA Series 4LHA DTZE DTZP 9 96 XVW g oe nm 1 20 ...
Page 307: ...Chapter 1 General 5 Dimensions i4LHA Series 4LHA HTZE HTZP g 96 xvw S06NIW 1 22 ...
Page 317: ...Chapter 1 General 7 Electrical Diagrams m4LHA Series 4LHA STZE 1 30 ...
Page 318: ...Chapter 1 General 7 Electrical Diagrams 4LHA Series 4LHA DTZE 1 32 ...
Page 319: ...Chapter 1 General 7 Electrical Diagrams 4LHA Series 4LHA HTE HTZE Eng stop solenoid 1 33 ...
Page 473: ...Chapter 3 Fuel Injection Equipment 9 Tools 4LHA Serie t 3 2 51 ...
Page 507: ...Chapter 5 Lubrication System 1 Lubrication System 4LHA Serie 1 1 Construction ...
Page 519: ...Chapter 6 Cooling Water System 1 Cooling Water System 4LHA Series Cylinder block ...