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An electronic control system supervises and manages all engine parameters to optimise performance and fuel consumption by means of a real-time response to different operating conditions. The system is managed by a single control unit which controls both ignition and injection. This version is equipped with a FIRE Turbo engine, derived from the aspirated FIRE 1.4 16V engine. Turbocharging is provided by a fixed geometry turbocharger and is managed by the Powertrain Control Module through a turbo pressure solenoid valve that regulates the wastegate and a shut-off solenoid valve. Depending on the signals received from numerous sensors, the control unit manages the injectors connected to it, handling the following systems:
The throttle body is also controlled electronically by the control unit: the throttle opening is calculated according to a specific logic inside the Powertrain Control Module; the mechanical connection between the accelerator pedal and the throttle body is thereby eliminated. Due to the electronic management described above, this engine conforms to the most recent emission control regulations (EURO 4). For more details See descriptions 1056 PETROL INJECTION SYSTEM The system is also controlled by dedicated relay switches in the engine compartment junction unit. Lines supplying the control unit and various system components (sensors and actuators) are protected by dedicated fuses that are also located in the engine compartment junction unit. |
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Powertrain Control Module M010 controls and governs the entire electronic ignition and injection system. The control unit M010 receives a direct supply from the battery at pin 70 of connector A through the line protected by fuse F18 of control unit B001. The ignition-operated power supply (15/54) arrives via a line protected by fuse F16 of the engine compartment junction unit B001 at pin 6 of connector A of M010. Pins 1, 2 and 4 of connector A of M010 are earthed. The main injection relay switch T09 of B001 controls the entire system: it is energised by an earth signal from pin 72 of connector A of control unit M010 and then forwards a power supply: - to pins 5 and 3 of connector A of the control unit itself, via the line protected by fuse F17 of B001; - to fuel vapour recovery solenoids L010, wastegate L037 and turbocharger by-pass L102, as well as oxygen sensors K015 and K017 (all these lines are protected by fuse F11 of B001); - to coils A030 and injectors N070 through a line protected by fuse F22 of B001. The fuel pump relay switch T17 of B001 is supplied by the line for fuse F21 of B001. This is energised by a control signal from pin 68 of connector A control unit M010 and supplies power to electric fuel pump N040. The Powertrain Control Module M010 receives signals from the various sensors, thereby keeping all the engine operating parameters under control. The rpm sensor K046 provides engine rpm information through a frequency signal sent to pins 37 and 38 of connector B of control unit M010. Timing sensor K047 is supplied from pin 11 of connector B of control unit M010; it receives a reference earth from pin 28 of connector B, and sends a frequency signal corresponding to the phase to pin 12 of connector B of the control unit. Integrated air temperature sensor K043 receives a reference earth from pin 44 of connector B; it sends a signal corresponding to the intake air temperature to pin 24 of the control unit. Pin 9 of connector B of M010 sends a power supply to sensor K043, which returns a signal proportional to intake air pressure to pin 25. Supercharging sensor K082 receives a reference earth from pin 44 of connector B and a power supply from pin 9 of connector B of M010 and returns a signal proportional to supercharging pressure to pin 21. Engine temperature sender unit K036 receives a reference earth from pin 29 of connector B of control unit M010 and provides a signal proportional to the temperature of the engine coolant to pin 43 of connector B of the control unit. The oxygen sensor on the pre-catalytic converter K015 and the one on converter K017 provide the control unit M010 with information concerning the correct composition of the air-fuel mixture Sensor K015 sends a signal to pin 55 of connector B of the control unit, while pin 52 provides a reference earth: these two signals are very low intensity and are therefore appropriately shielded. Sensor K015 is heated by a coil to ensure correct operation even when cold; the coil is supplied by the main relay switch T09; pin 16 of connector B of M010 provides the reference earth. Sensor K017 sends a signal to pin 53 of connector B of the control unit, while pin 54 provides a reference earth: these two signals are very low intensity and are therefore appropriately shielded. Sensor K017 is heated by a coil to ensure correct operation even when cold; the coil is supplied by the main relay switch T09; pin 1 of connector B of M010 provides the reference earth. The detonation sensor K050 provides information, by means of frequency signals, concerning the onset of detonation in the combustion chamber: it sends two signals to pins 36 and 51 of connector B of M010; these signals are also appropriately shielded. Accelerator pedal K055 contains two built-in potentiometers (a main one and a safety one). The former receives power and earth signals from pins 27 and 29 of connector A of M010 and sends a corresponding signal to pin 55 of the same connector. The latter receives power and earth signals from pins 49 and 30 of connector A of M010 and sends a corresponding signal to pin 79 of the same connector. The control unit M010 receives - at pin 35 of connector B - a signal from the minimum engine oil pressure sensor K030. Pin 87 of connector A of M010 receives a signal from brake light switch I030 - N.O. contact - with an ignition-operated power supply from fuse F37 of Body Computer M001. Through the CAN, it receives a signal - N.C. contact - from brake light switch I030, with an ignition-operated power supply from fuse F51 of Body Computer M001 Pin 61 of connector A of M010 receives the signal coming from the clutch switch I031. Pin 84 of connector A of M010 receives the signal coming from the clutch switch I020. Control unit M010 controls the opening of the injectors N070 by means of special signals sent from pins 17, 14, 2 and 19 of connector B of M010. The injectors N070 receive a power supply to enable main relay switch T09 of B001 to open. Control unit M010 also controls the coils A030 via control signals for the primary winding of the coil, while the secondary winding sends an impulse to the spark plugs: from pins 31, 48, 46 and 47 of connector B of M010. The primary windings of coils A030 receive power supply to enable opening of main relay switch T09 of B001. Throttle body actuator N075 has two built-in potentiometers connected in parallel: this controls the throttle opening by means of a step motor. The motor receives a power supply from pins 49 and 50 of connector B of M010. Pin 10 of connector B sends power to both potentiometers, while pin 13 sends an earth signal to the potentiometers; pins 42 and 22 of the same connector receive signals that reach throttle body actuator N075. Fuel vapour recovery solenoid valve L010 allows fuel vapours to flow through toward the engine intake, where they join the mixture that is entering the combustion chamber. Valve L010, supplied by the main relay switch T09 of B001, is opened by the control unit when the engine is operating under load by means of a signal from pin 3 of connector B of M010. The turbo pressure solenoid valve regulates the turbocharger's mechanical wastegate valve; solenoid valve L037 is supplied by the main relay switch T09 of B001 and is controlled by the control unit via a signal from pin 19 of connector A of M010. The turbocharger by-pass solenoid L102, connected to the intake pipe near the throttle body, allows the excess pressure to be discharged during the release stage in order to prevent excessive increases in pressure which could damage the inlet pipes and upset the operation of the turbine. It is supplied by the main relay switch T09 of B001 and is controlled by the control unit via a signal from pin 5 of connector B of M010. The control unit M010 is then connected through the CAN to the Body Computer M001 and to the other network nodes: information on the following is sent through this connection - self-diagnosis of the system that also produces a signal for the EOBD warning light, located on the instrument panel E0050 and that is connected to the connector R010; - engine coolant temperature, which is sent to the instrument panel E050 which manages the gauge and the warning light; - engine rpm, which is sent to the instrument panel E050 rev counter; - minimum engine oil pressure, which is sent to the instrument panel E050 that controls the warning light; It receives the speedometer signal, through the CAN, produced by the ABS control unit M050 |
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