2009 LAMBORGHINI MURCIÉLAGO sensor
[x] Cancel search: sensorPage 198 of 1173
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L824 01 00 03
Fig.2
® 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 $
36.Lower the car.
37. Remove the silencer loosening the lower mounting devices (not the bolts with bolts) (025103).
38. Loose the rear stabilizer bar and move it backwards (051103).
39. 5 H P R Y H W K H F D Q L V W H U K H D G S L S H
40. ' L V F R Q Q H F W W K H J U R X Q G F D E O H V I U R P W K H K H D G
41. ' L V F R Q Q H F W W K H Z K L W H F R Q Q H F W R U I U R P W K H H Q J L Q H À \ Z K H H O
42. Disconnect the alternator cables (090303).
43. Disconnect the injection (side) and the ignition (front) cables.
44. ' L V F R Q Q H F W W K H F D W D O \ V W W H P S H U D W X U H V H Q V R U V D Q G W K H W K H U P R F R X S O H D Q G R [ \ J H Q V H Q V R U F D E O H V (025303).
45. Disconnect the knock sensor (4) wiring harness, the phase transformers (2) (019003)and the MAPS (2).
46. Remove the crossbar.
47. Remove the power steering pipes (042303).
48. Remove the two silencer hood brackets.
49. Remove the air conditioning system compressor pipes (026003).
50. Lift the vehicle on the car lift 20 cm from the ground.
51. ) L [ W K H I R X U H Q J L Q H H [ W U D F W L R Q I U D P H K R R N V W R W K H H Q J L Q H V L G H H \ H V D Q G O L I W W K H Z K R O H H Q J L Q H G U L Y H D V V H P E O \ Y H U \
carefully directing it by hand to prevent it from knocking any vehicle part.
52. $ U U D Q J H W K H H Q J L Q H G U L Y H D V V H P E O \ R Q D S U R S H U V X S S R U W
, ) 7 + ( 5 ( , 6 $ 1 ( * ( $ 5 1 ( 9 ( 5 ' , 6 & 2 1 1 ( & 7 7 + ( 2 , / 3 , 3 ( 6 / ( $ 9 ( 7 + ( 2 , / 3 $ 1 & 2 1 1 ( & 7 ( '
7 2 7 + ( * ( $ 5
' , 6 & 2 1 1 ( & 7 $ / / 2 ) 7 + ( ( * ( $ 5 : , 5 ( 6
Page 199 of 1173
1
L824 01 00 05
Fig.1
® 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 D V V H P E O \
7 K L V R S H U D W L R Q U H T X L U H V D F D U O L I W D Q G D K R L V W Z L W K D U R F N L Q J O H Y H U D Q G F K D L Q V W R V O L Q J W K H H Q J L Q H W R E H ¿ [ H G R Q W K H H [ K D X V W P D Q L I R O G K R R N V
1. Lift the vehicle on the car lift 20 cm from the ground.
2. Fix the four engine extraction frame to the engine side eyes and lift the whole engine-drive assembly very
carefully directing it by hand to prevent it from hurting any vehicle part.
3. After the engine-drive assembly has been inserted, let the vehicle down the car lift.
4. Connect the air conditioning system compressor pipes (026005).
5. Insert the two silencer hood brackets.
6. Insert the power steering pipes (042305).
7. Connect the lower water pipe between the engine and radiator.
8. Fix the crossbar.
9. Connect the knock sensor (4) wiring harness, the phase transformers (2) (019005)and the MAPS (2).
10. Connect the catalyst temperature sensors (025405)and the thermocouple and oxygen sensor cables
(025305).
11. Connect the injection (side) and the ignition (front) cables.
12. Connect the alternator cables (090305).
13. & R Q Q H F W W K H Z K L W H F R Q Q H F W R U W R W K H H Q J L Q H À \ Z K H H O
14. Connect the ground cables from the head 7-12.
15. Insert the canister-head 1-6 pipe.
16. Fix the rear stabilizer bar and move it forwards (051105).
17. Assemble the silencer tightening the rear mounting devices (not the bolts with springs) (025105).
18. Lift the vehicle on the car lift.
19. Reattach the silencer mounting devices (025105).
Page 263 of 1173
1
L824 01 17 00
Fig.1
A
BCD
E
FGHILM
N
O
P
Q
RST
® 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 $
Oil cooler
Dry pan lubrication with gear pump in the crankcase controlled by independent chain. Oil cooling radiator. The pump is equipped with a pressure
regulator. Oil vapors from head and oil tank re-cycling.A. Tank
B. Oil dipstick
C. Oil vapors from RH head
D. Oil vapors from LH head
E. 2 L O ¿ O W H U
F. Pressure regulator
G. Oil pump
H. Pan-radiator pipe
I. Oil radiator
L. Oil tank drain plug
M. Oil temperature sensor
N. 6 L H Y H ¿ O W H U
O. Tank-pan pipe
P. Oil vapors to LH manifold re-cycling
Q. 2 L O Y D S R U V W R / + D L U ¿ O W H U U H F \ F O L Q J
R. Tank-radiator pipe
S. Oil pan
T. Oil aspirator
Page 272 of 1173
1
L824 01 21 00
Fig.1
A
B
C
D
E
FG
H
I
L
MN
O
P
Q
R
S
TU
VZXF
® 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 $
Closed loop cooling system with forced circulation by crankshaft belt-driven centrifugal pump. Thermostatic valve
and double rear radiator.A. Climate control system
B. 0 L Q L P X P À R Z U D W H V R O H Q R L G Y D O Y H
C. 0 L Q L P X P À R Z U D W H S X P S
D. Water outlet from heads
E. Radiator expansion tank
F. Bleed from heads
G. Breather pipe from radiator
H. 0 D Q L I R O G ¿ O O L Q J X S I U R P U D G L D W R U V
I. RH radiator
L. Manifold pipe from radiators
M. LH radiator
N. Tank bleed manifold
O. Manifold pipe to radiators
P. Belt tensioner
Q. Water pump belt
R. Water pump pulley
S. Water pump O-ring
T. Water pump
U. Water manifold from heads
V. Water temperature sensor
Z. Thermostatic valve
X. Thermostatic valve body
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L824 01 28 002
( 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
Page 292 of 1173
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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.
Page 294 of 1173
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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
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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