LAMBORGHINI MURCIÉLAGO 2009 Service Repair Manual
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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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® 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 $
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.
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® 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 System
The aim of the injection management strategies is to supply the engine with the correct amount of fuel at the required
moment according to the engine operating conditions.
The injection management is essentially the calculation of the injection time, the determination of the injection timingand the subsequent actuation through the injector control.
The “basic” injection time is calculated by a mathematical interpolation of the speed-load map: The values contained
L Q W K H P D S R E W D L Q H G H [ S H U L P H Q W D O O \ D O V R G H S H Q G R Q W K H L Q M H F W R U V S H F L ¿ F D W L R Q V
7 K H ³ ¿ Q D O ´ L Q M H F W L R Q W L P H L V R E W D L Q H G E \ D F D O F X O D W L R Q D O J R U L W K P L Q Z K L F K W K H ³ E D V L F ´ W L P H L V F R U U H F W H G E \ F R H I ¿ F L H Q W V
that take into account the different engine operating conditions both at sea level and at altitude, which are indicated by the various sensors installed in the system.
0 L [ W 0 L [ W X U X U X U H H 6 6 W U W U W U H Q J W K H Q J W K & K H F N F K H F N L Q I I H H G E H H G E H H G E D F N D F N F O R F O R V H G H G O R R S O R R S
7 K L V V W U D W H J \ F R U U H F W V W K H L Q M H F W L R Q W L P H V V R W K D W W K H P L [ W X U H V W U H Q J W K À X F W X D W H V F R Q W L Q X D O O \ 7 K H I U H T X H Q F \ R I W K H À X F W X D W L R Q F K D Q J H V D F F R U G L Q J W R W K H H Q J L Q H O R D G D Q G V S H H G
The ratio below is the mixture ratio and is indicated with the Greek letter á (alpha): Quantity of air taken in by the engine
Quantity of injected fuel
The ratio below is the stoichiometric mixture ratio and is indicated with a st: Theoretical quantity of air to burn - All the injected fuelQuantity of injected fuel
The ratio below is the mixture titration and is indicated with the Greek letter ë (lambda): Quantity of air taken in by the engine
.
Theoretical quantity of air to burn - All the injected fuel
The stoichiometric ratio depends on the type of fuel: For current unleaded petrol it is equivalent to approx. 14.7, that corresponds to a lambda titration = 1.
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® 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 $
A rich mixture is when the air quantity is less than the stoichiometric quantity and in this case we have Ilios lambda <1;
A weak mixture is when the air quantity is greater than the stoichiometric quantity and in this case we have Ilios
lambda >1;
7 K H I H H G E D F N R S H U D W L R Q F O R V H G O R R S S H U P L W V W K H F D W D O \ W L F F R Q Y H U W H U V W R R S H U D W H H I ¿ F L H Q W O \ 7 K L V R S H U D W L Q J F R Q G L W L R Q
also enables the engine control
unit to run its self-learning function.
The pre-catalytic oxygen sensors are linear and allow the engine to continuously operate under strengthcontrol; even in the WOT condition, the strength is guaranteed by the control system.
Cold Start and Running
The injection time during the starter motor actuation is determined by a special mapping according to the coolant and oil temperatures: After ignition has taken place the system passes over to the standard speed-load mapping.
When there is a cold start, since there is a natural impoverishment of the mixture due to reduced evaporation and heavy condensation on the inner walls of the fuel intake manifold, the “basic” injection time is increased by a
P X O W L S O \ L Q J F R H I ¿ F L H Q W D F F R U G L Q J W R W K H H Q J L Q H W H P S H U D W X U H $ F F H O H U D W L R Q D Q G ' H F H O H U D W L R Q
Acceleration and deceleration are interpreted by the system as transient stages between two stationary conditions:
This may be positive (acceleration) or negative (deceleration).
The transient strategy is very complicated since many factors have to be taken into consideration.
Usually the injection time is increased for positive transients and decreased for negative transients.
The size of the correction depends basically on the engine load variation: However, also values such as throttle
movement speed (inside the throttle bodies), engine speed, engine temperature (coolant and intake air) are also involved. Injector Control
The injector control is a timed sequential type. Rotation Speed Limiting
The strategy limits the peak speed that can be reached by enabling the cut-off when the engine reaches this speed.
Peak speed = 8150 rpm
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® 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 $
) X H O 3 X P S & R Q W U R O
Due to security reasons concerning the presence of throttle bodies the fuel pumps and injectors of cylinder bank 1-6
are supplied by relays controlled by LIE 7- 12 control unit and vice versa.
The pumps are stopped:
• If the engine speed drops under 350 rpm approx.;
• After a certain time (about 3 seconds) with the key to MAR position without starting up (timed enable);
Self-learning strategy
Self-learning only affects the optimum air percentage for the idle speed (0 to 60 seconds). The strength is kept constant with the target strength (value requested by the system under that particular operation condition).
The range of operation of the pre-catalytic oxygen sensor (linear) is 0.8 to 1.20.
If the value is below 1.00, the system is RICH; otherwise, the system is POOR.
The self-learning values of the linear oxygen sensors are always saved in the control unit during normal
operation.
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® 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 $
& D Q L V W H U : D V K L Q J
This strategy checks the position of the canister washing solenoid valve in this way: • With the engine hot the control unit operates the solenoid valve so as to check the quantity of fuel vapors sent to
the intake (canister washing), according to the engine speed and load. The system alternates washing periods
with no washing periods: During the latter the self-adaptation strategy can be enabled, if these conditions
occur.
• During start-up the solenoid valve remains closed, preventing the fuel vapors from enriching the mixture;
•
7 K H Y D O Y H V F D Q E H R S H Q H G Z K H Q D ³ F O R V H G O R R S ´ L V Y H U L ¿ H G
• The valve, under certain engine operation conditions, can also operate at idle speed.
• new purge solenoid to be checked using the LDAS system, “Checklistn_LP640_MY09” screen .
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® 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 J L Q H , G O H 6 S H H G & R Q W U R O
The aim is to maintain the engine rpm at around the memorised value, depending on the start-up temperature andthe start-up time itself. A throttle value and an ideal advance value are associated with each target rpm (which forms
a set point around which the system works to maintain the pre-established rpm).
• Start-up with cold engine
During the ignition transient with cold engine an offset on throttle bodies opening is managed according to
engine coolant temperature/ignition seconds.
• : D U P H Q J L Q H
When starting with a warm engine, a throttle bodies opening offset is applied based on the engine coolant temperature / ignition seconds and engine oil temperature in order to bring the engine to at least 1,000 rpm
and prevent vapor-lock. Following these operations the system goes to idle conditions where the control unit
automatically maintains the target rpm by carrying out the necessary corrections on the advance and air.
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Fig.2
5 7 $ B 5 ( $ ' 5 7 $ B 5 ( $ '
5 7 $ B 5 ( $ ' 5 7 $ B 5 ( $ '
A
'
1-6
7-12C
%
(
® 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 $
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
A
A
%C ' (
F
(
F
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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
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 $
) X H O 3 U H V V X U H 5 H J X O D W R U
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 ).
: K H Q W K H S U H V V X U H H [ F H H G V W K H V H W S U H V V X U H W K H G R Z Q À R Z Y D O Y H R S H Q V D Q G W K H H [ F H V V I X H O U H W X U Q V W R W K H W D Q N
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.
3 U H V V X U H U H J X O D W R U ) L J
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
11
L824 01 28 00
Fig.4A
%C ' (
F
GH
I
A
(
H
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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
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 $
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).
: K H Q F X U U H Q W S D V V H V W K U R X J K W K H Z L Q G L Q J W K H P D J Q H W L F ¿ H O G F U H D W H G D W W U D F W V W K H D Q F K R U C-Fig.4) and as a
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).
, Q M H F W R U ) L J
1. Snug
2. Needle
3. Magnetic anchor
4. Winding
5. Connector
6. Filter
7. Spring thruster
8. Body
9. Return spring