fuel pressure LAMBORGHINI MURCIÉLAGO 2009 Service Repair Manual
[x] Cancel search | Manufacturer: LAMBORGHINI, Model Year: 2009, Model line: MURCIÉLAGO, Model: LAMBORGHINI MURCIÉLAGO 2009Pages: 1173, PDF Size: 98.14 MB
Page 283 of 1173
![LAMBORGHINI MURCIÉLAGO 2009 Service Repair Manual 1
L824 01 27 00
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® Automobili Lamborghini S.p.A.
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L824 01 27 00
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® Automobili Lamborghini S.p.A.
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Fig.1
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Z U L W W H Q D X W K R U L ] D W L R Q I U R P $ X W R P R E L O L / D P E R U J K L Q L 6 S $
Fuel supply system The fuel supply system is divided into two parts and consists of the following: •
A tank;
• 7 Z R L Q G H S H Q G H Q W G H O L Y H U \ O L Q H V H D F K Z L W K S U H ¿ O W H U H O H F W U L F S X P S D Q G I X H O ¿ O W H U
• 7 Z R L Q G H S H Q G H Q W P D Q L I R O G V H D F K L Q F O X G L Q J I X H O S U H V V X U H U H J X O D W R U D Q G V L [ L Q M H F W R U V
• A return line in common.
Fuel System diagram (Fig.1)
A. Tank
B. Pumps in the tank
C. Filter
D. Fuel Manifold
E. Pressure regulator F. Immobilizer MED valves
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Fig.2
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/ D P E R U J K L Q L 6 S $ E D V H G R Q F R S \ U L J K W O D Z $ O O R I W K H 3 ' ) F K D S W H U V L Q W K H : ( % Z R U N V K R S P D Q X D O V G H V F U L E H G E H O R Z D U H E D V H G R Q L Q I R U P D W L R Q D Y D L O D E O H D W W K H W L P H R I S X E O L F D W L R Q 7 K H F R P S D Q \ U H V H U Y H V
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Z U L W W H Q D X W K R U L ] D W L R Q I U R P $ X W R P R E L O L / D P E R U J K L Q L 6 S $
Fuel pump
The two fuel pumps are supplied by a relay controlled by LIE control unit. For safety reasons the pump relevant to
cylinder bank 1-6 is controlled by LIE control unit of cylinder bank 7-12 and vice versa. They are roller type positive displacement pumps with permanent magnet energizing.
, Q V L G H W K H S X P S W K H U H L V D S U H V V X U H U H O L H I Y D O Y H W K D W V K R U W V W K H L Q W D N H Z L W K W K H G H O L Y H U \ L I W K H S U H V V X U H H [ F H H G V bars.
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with the pump at a standstill. This valve is especially important since by holding the system pressure it prevents fuel vapor from forming (vapor-lock) that causes damage when starting up with a warm engine.
7 K H L Q W D N H S L S H R I H D F K S X P S L V H T X L S S H G Z L W K D S U R W H F W L R Q S U H ¿ O W H U L Q V L G H W K H W D Q N
Fuel Filter
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It consists of an aluminum foil wrapping and an internal polyurethane support around which is wound a powerful
¿ O W H U L Q J H O H P H Q W
The arrow indicates the assembly direction (Fig.2).
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Fig.1
A
B
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® Automobili Lamborghini S.p.A.
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/ D P E R U J K L Q L 6 S $ E D V H G R Q F R S \ U L J K W O D Z $ O O R I W K H 3 ' ) F K D S W H U V L Q W K H : ( % Z R U N V K R S P D Q X D O V G H V F U L E H G E H O R Z D U H E D V H G R Q L Q I R U P D W L R Q D Y D L O D E O H D W W K H W L P H R I S X E O L F D W L R Q 7 K H F R P S D Q \ U H V H U Y H V
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) X H O V X S S O \ V \ V W H P S U H V V X U H F K H F N •
Disassemble the engine hood support pistons (082703).
• Position the block for supporting the hood (082703).
• Remove the silencer safety grid (025103).
• Disassemble the right side carbon bulkhead (081303).
• Remove the two clamps that secure the air pipes to the engine.
• ' L V D V V H P E O H W K H ¿ O W H U F R Y H U
• Loosen the radiator expansion tank.
1. Connect to the measurement instrumentation ( A-Fig.1) by inserting the latter between the fuel pump ( B-Fig.1)
and the coupling ( C-Fig.1).
The pressure must be measured while the engine is at idle speed.
7 K H Y D O X H R Q W K H P H D V X U H P H Q W L Q V W U X P H Q W D W L R Q P X V W E H E H W Z H H Q D Q G E D U
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( Q J L Q H F R Q W U R O V \ V W H P I X Q F W L R Q O D \ R X W
1. Front relay/fuse box
2. Engine speed and TDC sensor
3.
Intake manifold solenoid valves andsecondary
air valves
4. Single ignition coil
5. Fuel vapor pressure sensor
6. throttle bodies
7. Fuel Pump
8. Exhaust gas pressure sensors
9. TMAP
10. Cylinder bank 1-6 catalyst upstream oxygen
sensor
(linear)
11. Air vent regulating actuators
12. Vacuum system tanks
13. Cylinder bank 1-6 catalytic converter
14.
Cylinder bank 1-6 catalyst downstream oxygen sensor
15. ENCS solenoid valve
16. Right radiator fan
17. Cylinder bank 1-6 valve timing solenoid valve
18. Spoiler actuators
19. Cylinder bank 1-6 fuel pressure regulator
20. Cylinder bank 1-6 post catalyst (USA)
21. ENCS valve 22. Cylinder bank 7-12 post catalyst (USA)
23. Cylinder bank 7-12 fuel pressure regulator
24. Cylinder bank 7-12 valve timing solenoid valve
25. Left radiator fan
26. Cylinder bank 7-12 catalyst upstream oxygen
sensor
27. Cylinder bank 7-12 catalytic converter
28. Cylinder bank 7-12 catalyst downstream oxygen
sensor
(linear)
29. Battery
30.
Cylinder bank 1-6 camshaft seat position
sensor
31. Canister
32.
Cylinder bank 7-12 camshaft seat position
sensor
33. Engine control unit (ECU)
34. Front relay/fuse box
35. Instrument board
36. GFA control unit
37. PCM control unit
38. Ignition switch
39. Conditioning system ECU
40. Cylinder bank 7-12 injectors 41. Oil pressure sensor
42. Knock sensors
43. Throttle position sensor
44. Engine oil tank
45. Oil temperature sensor
46. E-gear oil tank
47. MED ECU
48. MED valves
49. Arrows and taillights diagnosis ECU
50. ETB ECU
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/ D P E R U J K L Q L 6 S $ E D V H G R Q F R S \ U L J K W O D Z $ O O R I W K H 3 ' ) F K D S W H U V L Q W K H : ( % Z R U N V K R S P D Q X D O V G H V F U L E H G E H O R Z D U H E D V H G R Q L Q I R U P D W L R Q D Y D L O D E O H D W W K H W L P H R I S X E O L F D W L R Q 7 K H F R P S D Q \ U H V H U Y H V
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2 S H U D W L Q J 3 U L Q F L S O H
Any operating point of the engine is found by two parameters: • Rotation Speed;
• Engine Load.
Having found these parameters through relevant processing, it is possible to calculate and obtain the injection (delivered fuel amount and relevant timing in relation to bursting TDC), the ignition (correct spark advance) and any
other function for each engine operating point.
The rotation speed is measured directly through the relevant sensor.
The engine load is determined indirectly trough a “density” parameter (representing the engine load) according to
the absolute pressure in the intake manifold and the intake air temperature.
The engine load is continuously detected from the LIEs and elaborated according to the user’s requirements (accelerator pedal): through the & $ 1line the / , ( Vsend the signal to the ETBs that control the throttle bodies
allowing the air in the intake manifold to reach a determined density (engine load).
: K H Q W H V W L Q J W K H H Q J L Q H ± D Q G D I W H U Z D U G V W K H F D U ± V S H F L ¿ F P D S V D U H S U H S D U H G L Q Z K L F K I R U D F H U W D L Q Q X P E H U R I
speed-load parameter pairs, the time/ injection timing values and ignition spark advance required for correct engine
operation are stored.
These injection time values are further corrected according to the signal coming from the oxygen sensor that, based R Q F H U W D L Q R S H U D W L R Q V W U D W H J L H V G H W H U P L Q H V D F R Q W L Q X R X V À X F W X D W L R Q R I W K H P L [ W X U H V W U H Q J W K D U R X Q G D W D U J H W Y D O X H
7 K H V \ V W H P L V W K H U H I R U H G H ¿ Q H G D V ³ V S H H G G H Q V L W \ O D P E G D ´ W \ S H V L Q F H W K H L Q M H F W L R Q W L P H L V I X Q G D P H Q W D O O \ G H W H U P L Q H G
by these three parameters.
All operation situations that require special adaptation of the calculated time/injection timing values, spark advance
and throttle bodies position are managed by the engine control unit, correcting the calculated base values through
suitable strategies according to the signals coming from the system sensors.
Page 298 of 1173
L824 01 28 00
Fig.2
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5 7 $ B 5 ( $ ' 5 7 $ B 5 ( $ '
A
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Fuel Manifold
Each cylinder bank is equipped with a fuel manifold that distributes the fuel to the injectors.
) X H O P D Q L I R O G ) L J
A. Cylinder bank 7-12 fuel manifold
% Cylinder bank 7-12 pressure regulator
C. Injector
' Cylinder bank 1-6 fuel manifold
( Cylinder bank 1-6 pressure regulator
In the throttle body pcodes, the positioning of the body depending on the cylinder bank and its position is
displayed: FrontandRear I U R Q W L V W K H W K U R W W O H E R G \ R Q W K H À \ Z K H H O V L G H D Q G U H D U L V W K H W K U R W W O H E R G \ R Q W K H
exhaust side).
F ly : e ll
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Fig.3
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This is a differential device with a diaphragm, located in the front part of each fuel manifold and set by the manufacturerto a pressure of 4.00 ± 0.05 bars.
The fuel under pressure coming from the pump pushes onto the diaphragm ( C-Fig.3 R I W K H G R Z Q À R Z Y D O Y H '
Fig.3 ), opposed by the calibrated spring ( % ) L J ).
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Furthermore, through the pressure tap ( A-Fig.3), the vacuum in the intake manifold (where the injector shutter is
also located), operating on the regulator diaphragm, proportionally reduces the load from the calibrated spring.
In this way the pressure difference is kept constant between the fuel and the environment in which the injector is located (intake manifold) under all engine operating conditions.
7 K H I X H O S U H V V X U H L V W D N H Q D V D ¿ [ H G S D U D P H W H U L H Q R W F K H F N H G E \ W K H F R Q W U R O X Q L W Z K H Q F D O F X O D W L Q J W K H D P R X Q W R I L Q M H F W H G I X H O 7 K H U H I R U H W K H U H J X O D W R U P X V W Q R W E H W D P S H U H G Z L W K W R D Y R L G D O W H U L Q J W K H engine metering.
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A. Vacuum signal tap
% Calibrated spring
C. Diaphragm
' ' R Z Q À R Z Y D O Y H
( Fuel return
F. Fuel inlet
Page 300 of 1173
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L824 01 28 00
Fig.4A
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A
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Injectors
The task of the injector is to deliver the amount of fuel required for the engine operation: The fuel is injected into theintake duct, immediately upstream of the intake valves.
As the pressure differential is constant between inside and outside the injector (due to the regulator), the quantity of
fuel delivered, with the same electric power depends only on the opening time, established by the control unit.
The injector is the “top-feed” type with the fuel supplied from the rear of the body ( H-Fig.4), where the electric
winding ( ' ) L J ) is also located, connected to connector ( ( ) L J ). The needle ( % ) L J ), integral with the anchor
( C-Fig.4 ), is thrust against the seal seat by a spring ( I-Fig.4).
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consequence the needle ( % ) L J R S H Q V W K H L Q M H F W R U D Q G W K H I X H O À R Z V W K U R X J K
When the current ceases, the shutter is called back into position by the spring ( I-Fig.4).
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1. Snug
2. Needle
3. Magnetic anchor
4. Winding
5. Connector
6. Filter
7. Spring thruster
8. Body
9. Return spring
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L824 01 28 01
® Automobili Lamborghini S.p.A. 7 K H L Q I R U P D W L R Q D Q G S U R F H G X U H V S X E O L V K H G E H O R Z D U H V W U L F W O \ F R Q ¿ G H Q W L D O D Q G H [ F O X V L Y H O \ I R U W K H / D P E R U J K L Q L ' H D O H U 1 H W Z R U N D Q G $ X W K R U L ] H G 6 H U Y L F H 3 R L Q W V $ O O F R S \ U L J K W V D U H S U R S H U W \ R I $ X W R P R E L O L
/ D P E R U J K L Q L 6 S $ E D V H G R Q F R S \ U L J K W O D Z $ O O R I W K H 3 ' ) F K D S W H U V L Q W K H : ( % Z R U N V K R S P D Q X D O V G H V F U L E H G E H O R Z D U H E D V H G R Q L Q I R U P D W L R Q D Y D L O D E O H D W W K H W L P H R I S X E O L F D W L R Q 7 K H F R P S D Q \ U H V H U Y H V
W K H U L J K W W R P D N H X S G D W H V D Q G P R G L ¿ F D W L R Q V 7 K H I R O O R Z L Q J D U H S U R K L E L W H G U H S U L Q W L Q J U H S U R G X F W L R Q I R U Z D U G L Q J W R X Q D X W K R U L ] H G S H R S O H D Q G R U W K L U G S D U W L H V D Q G W U D Q V O D W L R Q L Q F O X G L Q J S D U W L D O Z L W K R X W
Z U L W W H Q D X W K R U L ] D W L R Q I U R P $ X W R P R E L O L / D P E R U J K L Q L 6 S $
, Q M H F W L R Q V \ V W H P F K H F N
& D U U \ R X W W K H W H V W L Q D J R R G Y H Q W L O D W H G D Q G I U H H R I Q D N H G À D P H V D U H D
' R Q R W V P R N H
3 U H O L P L Q D U \ F K H F N V Start the engine and: • Check pipe and clamp condition;
• Check for pipe and regulator leakage;
• Replace any component that presents visible leakage.
3 U H V V X U H U H J X O D W R U F K H F N
To check the operation of the pressure regulator proceed as follows: • Connect a precision pressure gauge to the shut off tap, inserting it between the injector holder manifold and the
delivery coupling; check that the tap is open;
• Start up the engine and check that pressure p is within the prescribed values:
3.5 < p < 4.2 bar
If the pressure is above 4.2 bar: replace the pressure regulator.
If the pressure is below 3.5 bar: Check the fuel pump delivery pressure: If the delivery pressure is correct replace the pressure regulator (5 bars).
• Check that the pressure inside the system does not fall below 1 bar for at least 1 hour. If there are no visible
leakages, check the regulator and injectors.
) X H O S X P S G H O L Y H U \ S U H V V X U H F K H F N
Close the tool tap to cut off the fuel pump delivery. Check that the pressure is above 4.5 bars. If the pressure is lower:• Check the MED valve condition;
• & K H F N I R U ¿ O W H U R E V W U X F W L R Q
• Check the pump delivery pressure upstream of the MED valve.
Page 302 of 1173
![LAMBORGHINI MURCIÉLAGO 2009 Service Repair Manual 1
L824 01 28 03
Fig.1 Fig.2
A
D
C
B
® Automobili Lamborghini S.p.A.
7 K H L Q I R U P D W L R Q D Q G S U R F H G X U H V S X E O L V K H G E H O R Z D U H V W U L F W O \](/img/62/57187/w960_57187-301.png "LAMBORGHINI MURCIÉLAGO 2009 Service Repair Manual 1
L824 01 28 03
Fig.1 Fig.2
A
D
C
B
® Automobili Lamborghini S.p.A.
7 K H L Q I R U P D W L R Q D Q G S U R F H G X U H V S X E O L V K H G E H O R Z D U H V W U L F W O \")
1
L824 01 28 03
Fig.1 Fig.2
A
D
C
B
® Automobili Lamborghini S.p.A.
7 K H L Q I R U P D W L R Q D Q G S U R F H G X U H V S X E O L V K H G E H O R Z D U H V W U L F W O \ F R Q ¿ G H Q W L D O D Q G H [ F O X V L Y H O \ I R U W K H / D P E R U J K L Q L ' H D O H U 1 H W Z R U N D Q G $ X W K R U L ] H G 6 H U Y L F H 3 R L Q W V $ O O F R S \ U L J K W V D U H S U R S H U W \ R I $ X W R P R E L O L
/ D P E R U J K L Q L 6 S $ E D V H G R Q F R S \ U L J K W O D Z $ O O R I W K H 3 ' ) F K D S W H U V L Q W K H : ( % Z R U N V K R S P D Q X D O V G H V F U L E H G E H O R Z D U H E D V H G R Q L Q I R U P D W L R Q D Y D L O D E O H D W W K H W L P H R I S X E O L F D W L R Q 7 K H F R P S D Q \ U H V H U Y H V
W K H U L J K W W R P D N H X S G D W H V D Q G P R G L ¿ F D W L R Q V 7 K H I R O O R Z L Q J D U H S U R K L E L W H G U H S U L Q W L Q J U H S U R G X F W L R Q I R U Z D U G L Q J W R X Q D X W K R U L ] H G S H R S O H D Q G R U W K L U G S D U W L H V D Q G W U D Q V O D W L R Q L Q F O X G L Q J S D U W L D O Z L W K R X W
Z U L W W H Q D X W K R U L ] D W L R Q I U R P $ X W R P R E L O L / D P E R U J K L Q L 6 S $
Injection rail disassembly 3 U H O L P L Q D U \ R S H U D W L R Q V •
Remove the carbon bulkhead above the manifold (081303).
Injection rail disassembly
1. Unscrew the three screws ( A-Fig.1) that secure the injection rail to the engine.
2. Disconnect the injection rail from the front pipe ( B-Fig.2).
3. Disconnect the pressure regulator’s pipe ( C-Fig.1).
4. Disconnect the regulator’s fuel delivery pipe ( D-Fig.1).
5. Extract the injection rail.
: K H Q I U H H L Q J W K H Y D U L R X V S L S H V E H Y H U \ F D U H I X O R I D Q \ I X H O U H V L G X H V V W L O O L Q V L G H W K H P Z K L F K F R X O G spill onto parts that are still hot inside the engine hood.
7 K H V H R S H U D W L R Q V V K R X O G W K H U H I R U H D O Z D \ V E H F D U U L H G R X W Z L W K W K H H Q J L Q H F R O G D Q G L Q D Q \ F D V H using a pan for collecting fuel that spills out of the pipes.