3315716 - E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT - Functional description

Functional description

The engine control unit M10 monitors and controls the entire electronic ignition and injection system. The supply controlled by the ignition (15/54) reaches pin 58 of M10 from the line protected by fuse F16 of junction unit B2.

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 13 of the control unit M10, and thus sends a supply:

  • to pin 4 of the actual control unit, via the line from fuse F17 of B1;
  • to pin 5 of the actual control unit, via the line from fuse F22 of B1;
  • to the heater K100, 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 from the line of fuse F21 of B1. It is energized by a control signal (earth) from pin 24 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 1, 2 and 3 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 111 of the control unit M10 and supplies power to the diesel heating resistance inside sensor K100. Control unit M15, responsible for controlling preheating of heater plugs A40, is supplied at connector C directly by the battery via a line protected by fuse F1 of B1. It is supplied, connector A, by the line for fuse F11 of B1 and exchanges command and control signals with pins 22 and 62 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. The rpm sensor K46 provides information concerning the engine speed through a frequency signal sent to pin 100 of the control unit M10 . It receives an earth signal from pin 99 of the control unit. Both signals are weak and are therefore suitably shielded by pin 101. Timing sensor K47 is supplied by pin 102 of M10 . It receives a reference earth from pin 104 of the control unit M10 and sends a frequency signal corresponding to the timing to pin 103. The engine temperature sensor K36 , receives a reference earth from pin 85 of the control unit M10 and supplies a signal proportional to the temperature of the engine coolant to pin 84. The same sender unit also supplies information to the temperature gauge and warning light  See E4010  INSTRUMENT PANEL . The air flow meter K41 receives a general supply from the line for fuse 11 of B1 and a reference voltage from pin 88 of M10 . It is supplied by the control unit from pin 97 of M10 , and sends to pin 89 a signal proportional to the air flow. K41 also contains an air temperature sensor which sends an air temperature signal to pin 86 of M10 . Accelerator pedal K55 is fitted with two built-in potentiometers (a main one and a safety back-up). The first receives power and earth from pins 78 and 76 respectively of M10 and sends a corresponding signal to pin 77. The second receives power and earth from pins 81 and 79 respectively of M10 and sends a signal to pin 80. The fuel temperature sensor K100 measures the temperature of the diesel entering. It receives a reference earth from pin 83 of M10 and sends the fuel temperature signal to pin 82. The supercharging sensor K82 measures the turbocharger pressure. It is supplied by pin 93 of M10 and receives a reference earth from pin 95. The signal is sent to in 94 of the control unit. 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 the power and reference earth from pins 90 and 92 of M10 ; it then sends the pressure signal to pin 91. The switch I30 N.A. contact is supplied when the ignition is turned on (15/54) from fuse line F1 of junction unit B2:when the brake pedal is pressed, the switch closes and sends the operation signal to pin 53 of M10. The same signal for the brake pedal I30 is also used for operating the brake lights See E2021 BRAKE LIGHTS .
the second contact for the brake pedal I30, N.C. contact, receives an ignition-controlled supply (15/54) from the line prote
... DATA ERROR - CROPPED TEXT | Ошибка данных - Текст обрезан ...