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1. (WO2017150164) MALFUNCTION DIAGNOSIS DEVICE FOR IGNITION CIRCUIT

Pub. No.:    WO/2017/150164    International Application No.:    PCT/JP2017/005188
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Tue Feb 14 00:59:59 CET 2017
IPC: F02P 17/00
F02P 3/01
Applicants: DENSO CORPORATION
株式会社デンソー
Inventors: MORITSUGU, Michiyasu
森次 通泰
TAKEDA, Shunichi
竹田 俊一
Title: MALFUNCTION DIAGNOSIS DEVICE FOR IGNITION CIRCUIT
Abstract:
Provided is a malfunction diagnosis device for an ignition circuit, the malfunction diagnosis device being provided with a sparkplug (30), an ignition coil (19), a serial connection body (14) of a capacitor configured from a high-side capacitor (14A) and a low-side capacitor (14B), a serial connection body (13) of a switching element configured from a high-side switching element (13A) and a low-side switching element (13B), a both-end voltage detector (22) for detecting voltages at both ends of the serial connection body of the capacitor, a midpoint voltage detector (22) for detecting a midpoint voltage at a connection point between the high-side capacitor and the low-side capacitor, and a determination unit (40) for determining the location of a malfunction in the ignition circuit on the basis of at least one voltage among the both-end voltages and the midpoint voltage.