Alfa Romeo Auto S.p.a.

Alfo Romeo Auto S.p.a.

Renato Saglimbeni

Giancarlo De Angelis

Riccardo Mainardi

Aldo Bassi

Dario Radaelli

Daniele Casagrande

A self-diagnosis device and process are proposed for a micro-computer control system for an internal combustion engine, particularly studied to display the functional state of preselected components of the same system, when this is in its operating configuration, the test program being executed by the same control system's micro-computer.

Self-diagnosis device and process for a micro-computer control system

The invention relates to an ignition control device of the microcomputer type in which a programmed microprocessor calculates the non-conduction time of the coil in order to attain a desired time for which the coil remains at maximum charge, and also calculates the time corresponding to the end of coil charge as a function of the spark advance suitable for the various engine operating conditions; the microprocessor also causes activation of the ignition coil, whereas the deactivation of the coil is controlled by a timer which counts the time corresponding to the end of coil charge on receiving reference pulses.

Ignition control device for an internal combustion engine

The invention relates to an injection control device for an internal combustion engine, in which a programmed microprocessor calculates the open time of a plurality of electrically operated injectors as a function of prechosen engine parameters, and determines the activation of said injectors into their open state and their deactivation into their closed state with the aid of a single timer, which counts-out the calculated open time. If a second injector is opened while a first injector is still delivering the fuel, the microprocessor calculates the difference between the open time of the second injector and the remaining open time of the first injector, so as to be able to count-out the open time of the two injectors on the single timer.

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Bollate, Italy

Renato Saglimbeni