Automobile electronic control modules communicating by pulse wid

Internal-combustion engines – Charge forming device – Fuel injection system

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36443104, 36443112, F02P 515

Patent

active

049228749

ABSTRACT:
A distributed processing system in an automotive environment achieves enhanced noise immunity and reduces the processing burden and background loop time of the master controller by providing for communication of signals between a master controller and a slave controller by pulse width modulated communication signals. In a preferred embodiment, the communicated signal is a spark advance which is transmitted to an ignition module for implementing spark events in an internal combustion engine. The spark advance pulse width is a linearly decreasing function of spark advance value since increased spark advance is associated with an increase in engine speed. The spark advance is encoded into a pulse width signal according to a method which simplifies decoding of the spark advance information in the ignition module.

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