125002409 - E5030 PETROL ENGINE ELECTRONIC MANAGEMENT - DESCRIPTION

Description

The 2.0 JTS engine features a fuel feed system with a high pressure pump for direct injection.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 - a Bosch Motronic MED7.1.1 with motorised throttle - 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;
  • high pressure fuel pump control;
  • air supply;
  • accelerator pedal;
  • engine cooling;
  • exhaust with catalytic converters controlled by four lambda sensors;
  • fuel vapour recirculation.
The control unit of this JTS engine manages the operation of th high pressure fuel pump by controlling an electric pressure regulator and an associated pressure sensor.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.The variable geometry intake system is managed by the injection control unit according to the engine operating conditions.The control unit also detects brake servo pressure drops via a specific sensor and acts to reduce load in order to restore more efficient braking.The electronic management system described above ensures that this engine complies with the toughest emission control regulations and acts as a continuous EOBD monitoring system.For more details    Characteristic of working principle 1056 PETROL INJECTION SYSTEMThe 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.