3026220 - E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT - Functional description
Functional description
The engine control unit
M10
monitors
and controls the entire electronic injection system.
The system is supplied directly by the battery
via a line protected by the maxifuse CVM located on the battery,
connector
B99
.
The supply controlled by the ignition (15/54)
reaches pin 28 of connector A of
M10 from the line protected
by fuse F16 of the engine compartment unit B1.The main injection relay T9 of B1
controls the entire system; the supply line is protected by fuse
F18 of B1; it is energized by a control signal (earth) coming from
pin 72 of the control unit M10, and thus sends a supply:
- to pin 1 of connector A of the actual control unit, via
the line from fuse F17 of B1;
- to pin 5 of connector A of the actual control unit, via
the line from fuse F22 of B1;
- to the air flow meter K41, to the solenoid valves L30,
L36; L62, to the control unit M15 , via the line from
fuse F11 of B1
The fuel pump relay T10 of
B1
is
supplied by the line of the fuse F21 of
B1
.
It is energized by a control signal (earth)
from pin 91 of connector A of control unit
M10 and supplies power
to fuel pump N40, which is earthed through the inertia switch I50, which
cuts off the circuit in the case of a crash and so prevents the
dangerous spilling of fuel.
Pins 2, 4 and 6 of connector A of
M10
are earthed.
The diesel pre-heating relay T19 of
B1
is
supplied by the line for fuse F20 of
B1
.
It is energized by a control signal (earth)
coming from pin 68 of connector A of the control unit
M10 and
supplies power to the diesel heating resistance O20.
Control unit
M15, which manages preheating
of spark plugs A40, is supplied directly from the battery via a
lline protected by fuse F1 of B1. It is supplied, connector C, by
the line for fuse F11 of B1 and exchanges command and control signals
with pins 52 and 93 of M10 which controls the timing.
Connector
B is connected to the heater plugs
A40.
The engine control unit
M10
receives
signals from the various sensors in order to monitor all engine
service conditions.
Rpm sensor
K46 supplies information on
engine speed via a frequency signal sent to pins 12 and 27 of connector
B of control unit M10.
Timing sensor
K47 is supplied from pin
11 of connector B of control unit M10.
It receives a reference
earth from pin 20 of connector B of control unit
M10 and sends
it a signal of frequency corresponding to the timing of pin 50 of
the same connector.
The engine temperature sensor
K45, receives
a reference earth from pin 41 of the control unit M10 and supplies
a signal proportional to the temperature of the engine coolant to
pin 58 of connector B.
The air flow meter
K41 receives a general
supply from the line for fuse F11 of B1 and a reference earth from
pin 44 of connector B of M10.
It is supplied by the control
unit from pin 29 of connector B of
M10, and sends pin 42 of connector
B a signal proportional to the air flow.
There is also an air
temperature sensor inside
K41 which sends an air temperature
signal to pin 37 of connector B of M10.
Accelerator pedal K55 is fitted with two
built-in potentiometers (a main one and a safety back-up). The former
receives power and earth from pins 30 and 45, respectively of connector
A of
M10 and sends a corresponding signal to pin 9.
The
latter receives power and earth from pins 46 and 8, respectively
of connector A of
M10 and sends a signal to pin 31.
The fuel temperature sensor
K81
measures the temperature of the diesel entering. It receives a reference
earth from pin 10 of connector A of
M10 and sends the fuel temperature
signal to pin 11.
The supercharging sensor
K82 measures
the pressure and temperature in the intake chamber, downstream of
the turbocharger.
It is supplied from pin 13 of connector B
of
M10 and receives a reference earth from pin 23 of connector
B.
The signal corresponding to the pressure value is sent to
pin 40 of connector B of the control unit. There is also an air
temperature sensor inside
K82 which sends a signal to pin 53
of connector B of M10.
The fuel pressure sensor
K83
is
responsible for providing the injection control unit with a feedback
signal for governing pressure and injection duration. It receives
power and a reference earth from pins 28 and 8 respectively of connector
B of
M10;
it then sends the pressure signal to pin 43.
The fuel pressure regulator
N77
has the task of keeping the value of the fuel pressure in the accumulator
constant. The two control signals come from pins 4 and 34 of connector B
of the control unit
M10.
The EGR solenoid
L30
controls exhaust
gas recirculation. it is supplied by the line for fuse F11 of
B1
and is controlled by a signal for pin 60 of connector B of M10.
The variable geometry solenoid valve
L36
regulates the operation of the turbine according to the engine load:
it is supplied by the line for fuse F11 of B1 and is controlled
by a signal for pin 15 of connector B of M10.
The solenoid valve on the throttle casing
L62
shutters and closes the throttle, for example when the engine is
switched off;
it is supplied by the line for fuse F11 of
B1
and is controlled by a signal for pin 59 of connector B of M10.
Pin 17 of connector A of
M10 receives
the signal coming from the brake lights switch I30, with the supply
controlled by the ignition (INT) from fuse F37 of the junction unit
B2.
Pin 79 of connector A of
M10 receives
the signal coming from the clutch switch I31.
The injectors
N70
receive the opening
go ahead supply from pins 117 (cylinders 1 and 2) and 118 (cylinders
3 and 4) of
M10
.
The engine management control unit sends
the command to the injectors
N70 from pins 16-47, 2-31, 1-46,
17-33 of connector B of M10 for cylinders 1, 2, 3 and 4, respectively.
The control unit
M10 receives the signal
for the minimum engine oil pressure sensor K30 at pin 35 of connector
B.
The water in diesel filter sensor
K31
;
is supplied by the line controlled by the ignition (INT) for fuse
F51 of
B2 and sends the corresponding signal to pin 74 of connector
A of M10.The control unit M10 is connected
via the CAN network to the Body Computer M1 and the other nodes
on the network: through this connection, it sends information concerning:
- system self-test, which can be used by connecting to connector
G of M1 .
- engine water temperature, which is sent to the instrument
panel E50 which manages the relevant gauge and warning light;
- rpm, which is sent to the rev counter of the instrument
panel E50 ;
- engine oil minimum pressure, which is sent to instrument
panel E50 which manages the relevant warning light;
- heater plugs pre-heating, which is sent to the instrument
panel E50 which manages the appropriate warning light;
- water in diesel filter, which is sent to the instrument
panel E50 which manages the display.
It receives, via CAN, the speedometer signal
generated by the ABS control unit
M50
The self-test system of the control unit
M10
also generates a signal - which comes from pin 71 of connector A
- which is connected directly to the 'EOBD' warning light located in
the instrument panel E50.
The self-test data can be read by con| ... DATA ERROR - CROPPED TEXT | Ошибка данных - Текст обрезан ... |
|---|