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 control unit that controls the twin ignition (static with lost spark) and the injection (phased).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;
exhaust with catalytic preconverter and converter controlled by four lambda sensors;
fuel vapour recirculation.
The 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 control unit also controls the hydraulic variable valve timing system, an exclusive device that allows optimisation of intake timing.This version also features a variable geometry intake system that is controlled by the injection control unit according to engine service conditions.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. 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 and showing a message on the instrument panel matrix display.The system is also controlled by dedicated relays in the engine bay 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 bay.