Opel Vectra B

Since 1995 of release

Repair and car operation

5.1.8.2. Multidot system of injection of fuel Multec-S of engine DOCH of 1,6 l

THE GENERAL DATA

Multidot system of injection of fuel Multec-S engine DOCH of 1,6 l

1. The gauge of position of a cranked shaft 2. The detonation gauge 3. System of repeated burning of the fulfilled gases 4. A throttle potentiometer 5. The step-by-step engine of management of idling turns 6. МАРдатчик

7. System of catching of steams of fuel 8. The ignition block 9. The oxygen gauge 10. The gauge of temperature of a cooling liquid 11. The gauge of temperature of air arriving in the engine 12. The camshaft gauge

System Multec – incorporated system of ignition and fuel injection, also includes the catalyst, a control system of allocation of steams of fuel and system of repeated burning of the fulfilled gases.

The fuel pump shipped in a fuel tank, submits fuel from a tank to a fuel atomizer through the filter. Pressure of fuel in system copes a pressure regulator. The regulator allows surplus of fuel to come back in a fuel tank at pressure excess in fuel system.

The electric control system consists of block ECU together with following gauges:

 – The potentiometer throttle заслонки informs block ECU position of opening or closing throttle заслонки;
 – The gauge of temperature of a cooling liquid informs block ECU engine temperature;
 – The gauge of temperature of air arriving in the engine informs block ECU temperature of air arriving in the engine;
 – The oxygen gauge informs block ECU the oxygen maintenance in exhaust gases;
 – The gauge of position of a cranked shaft informs block ECU frequency of rotation of the engine and position of a cranked shaft;
 – The gauge of a detonation established in the block of cylinders is used for detection of the beginning of a detonation or early ignition;
 – The gauge of position of a camshaft informs block ECU camshaft position;
 – The gauge of absolute pressure in a collector informs block ECU depression in an inlet collector;
 – Block ABS gauge informs block ECU relative speed of the car;
 – The switch of the compressor of a central air of air informs block ECU on central air inclusion.

All information from gauges is analyzed by block ECU and on this basis the block defines a corresponding corner of an advancing of ignition and structure of a fuel mix. Block ECU operates fuel atomizers, defining width of an impulse, that is an interval of time, when the atomizer is opened to provide richer or poorer fuel mix. Multec-S – the consecutive system of injection of fuel, that is each of four fuel atomizers opens before opening of the inlet valve.

Block ECU also supervises idling turns. For this purpose there is the step-by-step engine operating position throttle заслонки.

Block ECU also operates structure of exhaust gases and a control system of allocation of steams of fuel.

If there is an error in any of the data received from gauges, ECU enters into a way of the doubler. In this case block ECU ignores a wrong signal of the gauge and accepts preliminary programmed value which allows the engine to continue work, though and with smaller efficiency. If ECU enters into a way of the doubler the alarm system lamp on combinations of devices and damage will light up it will be written down in memory ECU. After that it is necessary to conduct full test of a control system by the engine, using the special electronic diagnostic test bed which simply joins in a diagnostic socket of system. The socket is located behind the central console. Thus for access to it it is necessary to remove decorative furnish in front of the lever of a manual brake.