Search International and National Patent Collections

1. (WO2018180814) STROKE DETERMINATION DEVICE FOR 4-STROKE ENGINE

Pub. No.:    WO/2018/180814    International Application No.:    PCT/JP2018/011180
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Wed Mar 21 00:59:59 CET 2018
IPC: F02P 17/00
F02D 45/00
Applicants: MAHLE ELECTRIC DRIVES JAPAN CORPORATION
マーレエレクトリックドライブズジャパン株式会社
Inventors: AYUZAWA, Takuma
鮎沢 琢麿
SUGIYAMA, Masayuki
杉山 正幸
SUZUKI, Yushi
鈴木 雄姿
TAKAMURA, Naoya
高村 直也
Title: STROKE DETERMINATION DEVICE FOR 4-STROKE ENGINE
Abstract:
Provided is a stroke determination device which detects a secondary output from an ignition coil without using a high breakdown voltage element, and on the basis of the waveform of the detected secondary output, is capable of accurately determining the stroke being completed during the ignition operation of a 4-stroke engine. The present invention configures a secondary coil of an ignition coil from a first coil section and a second coil section which is connected in series to the first coil section and is wound so as to have fewer windings than does the first coil section. A tap is drawn from the boundary between the two coil sections, the voltage at both ends of the second coil section or the current flowing through the second coil section is detected via the tap, and a parameter to be used in stroke determination is detected on the basis of the waveform of the detected voltage or current.