IGNITION DEVICE FOR INTERNAL COMBUSTION ENGINES

摘要

An ignition device for engine according to the present invention performs continuous spark discharge of an ignition plug by using a multiplex signal, an integration signal or a control signal. In the multiplex signal, discharge continuous signals IGW#1 to 4 for cylinders of the engine have been multiplexed. In the integration signal, a discharge continuous signal IGW and a secondary current instruction signal IGA have been added to an ignition signal IGT. In the control signal, the secondary current instruction signal IGA has been added into the multiplex signal or the integration signal. This structure can reduce the total number of signal lines connected between an ECU and a controller, and further reduce a signal line to transmit the secondary current instruction signal IGA.

主权项

1. An ignition device for internal combustion engines comprising:
a main ignition circuit performing power supply control of a primary coil in an ignition coil to generate spark discharge in a corresponding ignition plug, the ignition coil being arranged in a cylinder of a multi-cylinder internal combustion engine; an energy supply circuit supplying electric energy to the primary coil during the spark discharge started by the operation of main ignition circuit in order to supply a secondary current to a secondary coil of the ignition coil, and to maintain continuously the spark discharge initiated by the operation of the main ignition circuit; a multiplex signal transmission section generating a multiplex signal in which at least two cylinder discharge continuous signals have been multiplexed, and transmitting the generated multiplex signal; and a cylinder signal extraction section receiving the multiplex signal and extracting the cylinder discharge continuous signals from the received multiplex signal, wherein the ignition device performs the spark discharge of the ignition plug continuously on the basis of the cylinder discharge continuous signals.