2889378 - E5030 PETROL ENGINE ELECTRONIC MANAGEMENT - Description (Euro 3)

Description

An electronic management system supervises and governs all engine parameters. It optimises performance and fuel consumption by responding in real time to different service conditions.The system is managed by a single control unit which controls both the ignition and the injection.

The system uses signals received from numerous sensors to control actuators. It is connected to the following systems:

• fuel supply;
• air supply:
• engine cooling system;
• fuel vapour recirculation.:
• control of combustion - Lambda sensors
• control of exhaust with catalytic silencer.

This version of the system also includes the EOBD (European On Board Diagnosis) system - conforming to Directive 98/69/CE (EURO 3) - permits continuous diagnosis of the car's components relating to emissions, and by the warning light coming on, indicates any deterioration of these components.

Among other things, the system diagnoses:

• the catalytic converter, which in the case of a malfunction does not convert the pollutants produced by the engine;
• the Lambda sensors (oxygen sensors);
• the lack of combustion, so unburnt fuel reaches the catalyzer where the thermal conversion reactions cause a sudden increase in temperature, damaging the catalyzer.

For greater detail, see  see DESCRIPTION AND OPERATION: 1056  PETROL INJECTION SYSTEM . The system is also controlled by means of two relays located in the fuse and relay box in the engine compartment near the actual control unit. The supply lines for the control unit and the various system components (sensors and actuators) are protected by a special maxifuse and three other fuses also located in the above mentioned box.