Arrangement and process for communication between an ignition module and control unit in a combustion engine's ignition system
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United States of America Patent
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-
Sep 26, 2000
Grant Date -
N/A
app pub date -
Jul 20, 1998
filing date -
Nov 18, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An arrangement and a process for communication between an ignition module (ICM) mounted on an engine and a control unit (ECM). The ignition module includes detection circuits and signal processing stages in order to determine at least one combustion related parameter from detected ionization currents in the combustion chamber (22). The control unit (ECM) communicates with the ignition module via at least one bi-directional communication wire (K.sub.CQ or K.sub.KI). Via the communication wire the control unit activates the detection in the ignition module, and the ignition module sends a signal corresponding to the magnitude of the detected parameter to the control unit on the same communication wire. Activation and transfer of parameter data is conducted sequentially over the communication wire.
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