IGNITION CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

Japanese Patent JP2017207012

A

PROBLEM TO BE SOLVED: To enable a control signal of a switching device that gradually decreases a primary side current of an ignition coil particularly in the event of abnormal electrification to be adjusted with a simpler configuration without having to change hardware in an ignition control device of an internal combustion engine.SOLUTION: Abnormal electrification of a switching device is monitored. In generating a control signal (soft shutoff waveform) of the switching device for gradually decreasing a primary side current of an ignition coil in the event of abnormal electrification so that an ignition plug causes no erroneous discharge due to a secondary side voltage of the ignition coil generated by cutting off the primary side current of the ignition coil, only the parameters having a large impact on a time for executing control to gradually decrease the secondary side voltage of the ignition coil and the primary side current of the ignition coil of the parameters that determine the shape of the soft shutoff waveform are made variable and selectable. The variable and selectable parameters can be set through an ignition control signal from an ECU.SELECTED DRAWING: Figure 1

SHIMA YASUO
KITA MASAHITO

JP2016100048A

November 24, 2017

May 19, 2016

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HITACHI AUTOMOTIVE SYSTEMS LTD

F02P3/05; F02P17/00; H01F38/12

JP2014238024A	2014-12-18
JP2004316469A	2004-11-11
JPS6477754A	1989-03-23
JPS62174565A	1987-07-31
JP2002004991A	2002-01-09
JP2008045514A	2008-02-28
JP2001248529A	2001-09-14
JPS62168968A	1987-07-25

WO2014162507A1

2014-10-09

Yuji Toda

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