Title:
SINGLE CYLINDER ENGINE MISFIRE DETECTION DEVICE, METHOD, AND VEHICLE
Document Type and Number:
WIPO Patent Application WO/2018/179341
Kind Code:
A1
Abstract:
The present invention aims to enable accurate misfire determination in a single cylinder engine without measuring inter-gear teeth errors in a crank pulsar rotor. A crank angle speed measurement unit (5b) measures the angle speed for each crank angle. A 720° filter treatment unit (6b) removes load change and friction change components. A relative angle speed calculation unit (7b) calculates the relative angle speed for each crank angle, relative to a reference angle speed detected in the vicinity of the compression top dead center and exhaust top dead center of the engine. A cumulative angle speed calculation unit (8b) cumulates the relative angle speed within a prescribed crank angle range and calculates the cumulative angle speed for the expansion stroke and the intake stroke, respectively. A misfire parameter calculation unit (10b) calculates misfire parameters from the cumulative angle speed, the reference angle speed, and a pumping torque component preset in an ECU. A misfire determination unit (11b) determines the presence of a misfire, on the basis of these misfire parameters.
Inventors:
KISHI NOBUYUKI (JP)
TOMODA AKIHIKO (JP)
NISHIDA KENJI (JP)
TOMODA AKIHIKO (JP)
NISHIDA KENJI (JP)
Application Number:
PCT/JP2017/013612
Publication Date:
October 04, 2018
Filing Date:
March 31, 2017
Export Citation:
Assignee:
HONDA MOTOR CO LTD (JP)
International Classes:
F02D45/00; G01P3/44
Foreign References:
| JP2016070255A | 2016-05-09 | |||
| JP2007170262A | 2007-07-05 | |||
| JP2004536993A | 2004-12-09 | |||
| JP2006183644A | 2006-07-13 | |||
| JPH09264183A | 1997-10-07 |
Attorney, Agent or Firm:
SAKAMOTO Kiyotaka et al. (JP)
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