939004902 - E5030 PETROL ENGINE ELECTRONIC MANAGEMENT - DESCRIPTION

DESCRIPTION

The JTS engine features a fuel supply 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 BOSCH MED7.6.1 control unit with a motorized throttle that controls both the ignition and the phased, sequential 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 the 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 controls the engine timing by means of a pair of electrohydraulic phase transformers - one on the inlet shaft and one on the exhaust shaft - for each bank; this solution makes it possible to ensure optimum timing managing the inlet and the exhaust separately; four timing sensors allows the continuous control of the solution set.The fuel shut-off solenoid valve, which cuts off the return flow of fuel to the tank is located on the fuel return pipe to the tank; this solenoid valve - only operated with the engine started - has the function of preventing the high pressure pump from draining thereby facilitating engine starting.Thanks to the electronic management described above, this engine conforms to the most recent pollution control standards (EURO 4).For more details    See descriptions 1056 PETROL INJECTION SYSTEM The system is also controlled by dedicated relays in the engine compartment 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.