【発明の名称】点火時期制御方法

Japanese Patent JPS592794

B2

PURPOSE:To ensure optimum ignition time control at any time by a method wherein during the time when a power supply decreases at start-up an engine or a revolving rate is low, ignition is controlled by a fixed ignition signal froma rotary sensor instead of a computing ignition signal in a normal operation. CONSTITUTION:A computing device 1 receiving an engine rotation signa I from a rotary sensor 2 and signals from various sensors 3 detecting other parameters relating to an engine operation state. At the device 1, an optimum ignition time is computed in accordance with a fixed program. A computing ignition signal is generated from a computing ignition signal set-up circuit 4 based on the above computed results. Further, a fixed ignition signal generating circuit 5 is incorportated to generate a fixed ignition signal commanding supply and interruption of a current from the output of the rotary sensor 2 to an ignition coil of an ignition device 8. Ignition signals from both generating circuits 4 and 5 are selected by a duplexer 7 and fed to the ignition device 8. For example, in case a rotating speed of an engine is low, a fixed ignition signal is selected and fed into the ignition device 8.

SHIRASAKI SHINJI
MASHIMA YOZO
OOYAMA HIDEO
MORI HIDETO

JP12298880A

January 20, 1984

September 05, 1980

Click for automatic bibliography generation  

NIPPON DENSO CO

F02P11/00; F02P3/045; F02P5/15; (IPC1-7): F02P5/04; F02P3/04; F02P11/00

Asamura Akira

Next Patent: PROPELLED SHIP