194003081 - E5030 PETROL ENGINE ELECTRONIC MANAGEMENT - DESCRIPTION

An electronic control system supervises and governs all engine parameters to optimise performance and fuel consumption by means of a real-time response to different service conditions.The system is managed by a single SIMTEC 75.9 control unit which controls both the ignition and the sequential, phased injection.Depending on the signals received from numerous sensors, the control unit controls the injectors connected to it managing the following systems:- fuel supply;- air supply;- accelerator pedal;- engine cooling;- control of combustion - Lambda sensors;- control of exhaust with catalytic converter.- fuel vapour recirculation.The motorised Drive By Wire throttle body is also controlled electronically by the control unit: throttle opening is calculated in accordance with specific software mapped inside the engine control unit. This system does away with the need for a mechanical link between accelerator pedal and throttle body.The intake air is then directed to a modular intake manifold controlled by the engine management control unit by means of an electropneumatic valve.The control unit controls the engine phasing by means of a pair of phase transformers, one on the inlet shaft and one on the exhaust shaft; this solution allows optimum phasing, managing the inlet and exhaust separately, if necessary. Two timing sensors allow the solution set to be continuously monitored.The engine ignition is managed by the engine management control unit and there is a single coil for each spark plug with a built-in power stage.The electronic management system described above ensures that this engine meets the very latest EOBD (European On Board Diagnogis) system emission control and monitoring requirements (EURO 4). This system allows continous diagnosis of emission-related car components and notifies the driver if any of the components should deteriorate by turning on a warning light in the instrument panel.For more details,    See descriptions 1056 PETROL INJECTION SYSTEMThe system is also controlled by dedicated relays in the engine compartment junction control unit. Lines supplying the control unit and various system components (sensors and actuators) are protected by dedicated fuses that are also located inside the engine compartment junction unit.