Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
ENGINE VEHICLE, INTER-GEAR TEETH ERROR REMOVAL METHOD FOR CRANK PULSAR ROTOR, AND DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/179340
Kind Code:
A1
Abstract:
The present invention aims to: remove crank pulsar rotor inter-gear teeth errors from misfire parameters, even in an engine with uneven firing intervals or a single-cylinder engine; and enable accurate identification of misfires. A crank angle speed measurement unit (5) detects the angle speed at each crank angle. A relative angle speed calculation unit (7) 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 for the engine. A cumulative angle speed calculation unit (8) cumulates the relative angle speed within a prescribed crank angle range and calculates the cumulative angle speed. An inertia torque component removal unit (9) and a pumping torque component removal unit (11) remove the inertia torque component and the pumping torque component from the cumulative angle speed and calculate a post-removal cumulative angle speed. An inter-gear teeth error coefficient learning unit (10) calculates and learns an inter-gear teeth error coefficient from the post-removal cumulative angle speed. An inter-gear teeth error component removal unit (12) uses the inter-gear teeth error coefficient, calculates an inter-gear teeth error component at each engine speed, and removes the inter-gear teeth error component from the post-removal cumulative angle speed.

Inventors:
KISHI NOBUYUKI (JP)
TOMODA AKIHIKO (JP)
SASAKI TOMIYUKI (JP)
Application Number:
PCT/JP2017/013611
Publication Date:
October 04, 2018
Filing Date:
March 31, 2017
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
HONDA MOTOR CO LTD (JP)
International Classes:
F02D45/00; G01P3/44
Foreign References:
JP2016070255A2016-05-09
JP2004536993A2004-12-09
JPH10176590A1998-06-30
JP2014199040A2014-10-23
JPH10231749A1998-09-02
JP2008111354A2008-05-15
Other References:
See also references of EP 3604779A4
Attorney, Agent or Firm:
SAKAMOTO Kiyotaka et al. (JP)
Download PDF: