3234556 - E5030 PETROL ENGINE ELECTRONIC MANAGEMENT - Description

Description

The 2.0 JTS engine fuel system is fitted with a high pressure pump for direct injection. 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 Bosch Motronic MED7.1.1 control unit with motorised throttle which controls both the ignition and the injection (sequential phased type).

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

• fuel supply;
• control of high-pressure fuel pump;
• air supply:
• accelerator pedal;
• engine cooling system;
• exhaust with catalytic converters controlled by four lambda sensors;
• fuel vapour recirculation.

The control unit of this JTS engine manages high pressure fuel pump operation by controlling an electric pressure regulator and pressure sensor.The throttle body is also controlled electronically by the control unit; special software in the engine management control unit computes throttle opening; this dispenses with the need for a mechanical connection between the accelerator pedal and the throttle body.The control unit also controls the hydraulic variable valve timing, an exclusive device which allows the intake timing to be optimised.The variable geometry intake system is also managed by the injection system on the basis of engine service conditions.Thanks to a specific sensor, the control unit also detects drops in the brake servo vacuum, and intervenes by reducing the load as appropriate so as to restore more efficient braking.Thanks to the electronic management described above, this engine conforms to the latest anti-pollution and continuous control regulations in accordance with the EOBD (European On Board Diagnosis) system. For more details  Characteristic of working principle 1056  PETROL INJECTION SYSTEM . The system is also controlled by means of special relays located in the engine compartment near the battery.The supply lines to the control unit and the various system components (sensors and actuators) are protected by a specific maxifuse and other fuses, located alongside in the additional fusebox.