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160 ELECTRIC/ELECTRONIC SYSTEM D AILY Base - May 2004 known. The designer has therefore included special instructions in the control unit to avoid it. De-rating decreasing the delivery to a varying degree, in proportion to the temperature reached by the coolant. Turbine rpm setting (.15 - .17) (for the variable geometry turbo-compressor) monitored by the electronic centre via an electrical signal feeding the compressed air actuator electro valve. Based on signals from the accelerator pedal position and suction manifold air temperature/pressure engine rpm sensors, the electronic centre processes the field-back signal to properly modulate turbine actuator pilot electro valve opening. Injection timing electronic test different from one injection to the next, also differentiated from one cylinder to another. It is calculated, similarly to the delivery, in relation to the engine load (accelerator position, engine speed and air introduced). The advance is appropriately corrected: the water temperature. Feedback from the start of delivery is supplied by the change in impedance of the injector solenoid valve. Speed governor governors: governors are imprecise. Engine starting cylinder no. 1 recognition signals (flywheel sensor and camshaft sensor) are synchronized. The accelerator pedal signal is ignored on starting. Starting delivery is set only according to water temperature, by a special map. When the control unit detects such speed and acceleration of the flywheel as to be able to consider the engine started up and no longer driven by the starter motor, it re-enables the accelerator pedal. Cold starting or diesel) records a temperature lower than 10°C, pre-post heating is activated. On inserting the key contact, the pre-heating indicator goes on and remains on for a period varying depending on temperature (air is heated by the pre-heating glow plugs that are located on cylinder head for F1 engines), then it blinks. Thereafter, the engine can be started up. When the motor is running this indicator light goes out, while the glow plugs continue to be powered for a certain length of time (variable) for post-heating. If, with the indicator light flashing, the engine is not started up within 20-25 seconds (inattention time), the operation is cancelled so as not to run down the batteries pointlessly. The pre-heating curve is also variable in relation to the battery voltage. Warm starting makes contact the indicator light comes on for approximately 2 sec., for a short test, and then goes out. It is now possible to start up the engine. Run up information stored in memory when the engine was last stopped into the main memory (see After Run) and makes a diagnosis of the system. After run control unit stays powered for a few seconds by the main relay. This makes it possible for the microprocessor to transfer some data from the main memory (volatile) to a non-volatile memory, which can be erased and written over (EEPROM), so as to make it available at the next start up (see Run Up). |