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Title:
CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JP2007162615
Kind Code:
A
Abstract:

To detect air-fuel ratios which are dispersed by those causes other than the operating characteristics of an intake valve.

An ECU performs the program including the step (S110) of controlling the motor of a VVL mechanism so that the intake valve of each of cylinders is closed at the bottom dead center, the step (S120) of detecting the rotational speed of a crankshaft based on the signals transmitted from a crank angle sensor, and the step (S130) of calculating the air-fuel ratio of each of the cylinders based on the rotational speed of the crankshaft at the crank angle corresponding to the expansion stroke of each of the cylinders.


Inventors:
Hamada, Takashi
Application Number:
JP2005000361738
Publication Date:
June 28, 2007
Filing Date:
December 15, 2005
Export Citation:
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Assignee:
TOYOTA MOTOR CORP
DENSO CORP
International Classes:
F02D13/02; F02D41/02; F02D45/00
Domestic Patent References:
JP2002371891A
JP2002303187A
Attorney, Agent or Firm:
深見 久郎
森田 俊雄
武藤 正



 
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