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Title:
AIR-FUEL RATIO CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/105820
Kind Code:
A1
Abstract:
Provided is an air-fuel ratio control device that makes it possible to avoid the occurrence of over-lean states in cylinders. This air-fuel ratio control device comprises: a directionality verification unit (37) that verifies whether the open-close direction of a throttle valve (3) and the fluctuation direction of torque generated by an internal combustion engine have the same directionality of change; and an air-fuel ratio feedback restriction unit (38) that, if it has been verified that the directionalities of change have a different relationship, restricts changes in an air-fuel ratio feedback coefficient K (MHG) to the same side as the direction in which the generated torque is changing.

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Inventors:
IKEDA YURIE (JP)
YONEMARU TOMOMI (JP)
Application Number:
PCT/JP2022/022494
Publication Date:
June 15, 2023
Filing Date:
June 02, 2022
Export Citation:
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Assignee:
HITACHI ASTEMO LTD (JP)
International Classes:
F02D41/04; F02D41/14
Foreign References:
JPS6338643A1988-02-19
JP2011252483A2011-12-15
JPH1047127A1998-02-17
JP2001071789A2001-03-21
JPH08254141A1996-10-01
Attorney, Agent or Firm:
SATO & ASSOCIATES (JP)
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