Title:
ENGINE PREIGNITION DETECTION DEVICE
Document Type and Number:
Japanese Patent JP2016113949
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a device which can accurately detect signed preignition even if detecting the signed preignition on the basis of the duration of discharge.SOLUTION: An engine preignition detection device comprises: a secondary current detection circuit (63) which detects a current flowing through a secondary-side coil (15b) of an ignition coil at ignition at which discharge is performed between electrodes of an ignition plug (14) by blocking a current flowing through a primary-side coil (15a) of the ignition coil at prescribed timing; discharge duration detection means (41) which detects the duration of the discharge from the detected current which flows through the secondary-side coil (15b) at each cycle; moving average processing means (41) which acquires a moving average by applying moving average processing to time-series data of the duration of the discharge which is detected at each cycle; and signed preignition determination means (41) which determines whether or not the preignition occurs on the basis of the moving average.SELECTED DRAWING: Figure 2
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Inventors:
AMAUCHI OSAMU
Application Number:
JP2014252700A
Publication Date:
June 23, 2016
Filing Date:
December 15, 2014
Export Citation:
Assignee:
NISSAN MOTOR
International Classes:
F02D45/00; F02P17/00; F02P17/12
Domestic Patent References:
| JP2010242702A | 2010-10-28 | |||
| JPH08261129A | 1996-10-08 | |||
| JP2011174382A | 2011-09-08 | |||
| JP2009085173A | 2009-04-23 | |||
| JPH1113615A | 1999-01-19 |
Attorney, Agent or Firm:
Masaki Goto
Masaaki Iida
Kenji Murase
Masaaki Iida
Kenji Murase
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