INTERNAL COMBUSTION ENGINE - TOYOTA MOTOR CO LTD

Title:

INTERNAL COMBUSTION ENGINE

Document Type and Number:

WIPO Patent Application WO/2014/006721

Kind Code:

A1

Abstract:

An internal combustion engine equipped with a supercharger, a variable valve device, an air-fuel ratio sensor provided in the exhaust passage, an air-fuel ratio feedback control means, and a scavenging air-fuel ratio control means. The variable valve device drives an intake valve and an exhaust valve, and is capable of driving with a valve opening characteristic provided with a valve overlap. The air-fuel ratio feedback control means provides feedback correction of the fuel injection amount on the basis of the output from the air-fuel ratio sensor, and obtains a learning value for information pertaining to air-fuel ratio control from the correction amount in the feedback correction. When the variable valve device is operated with a scavenging valve open characteristic, the scavenging air-fuel ratio control means executes air-fuel ratio control using a learning value learned when the internal combustion engine is operating with a valve open characteristic which is not the scavenging valve open characteristic. The scavenging valve open characteristic is a valve open characteristic having a valve overlap amount such that blow-by of the intake air occurs in the intake stroke during operation of the supercharger.

Inventors:

KONDO TETSUO (JP)

Application Number:

PCT/JP2012/067208

Publication Date:

January 09, 2014

Filing Date:

July 05, 2012

Export Citation:

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Assignee:

TOYOTA MOTOR CO LTD (JP)
KONDO TETSUO (JP)

International Classes:

F02D13/02; F02D23/00; F02D41/14; F02D45/00

Domestic Patent References:

WO2012059953A1

2012-05-10

Foreign References:

JPH02241941A	1990-09-26
JPH0481533A	1992-03-16
JPH04325748A	1992-11-16
JP2008157057A	2008-07-10
JP2006194112A	2006-07-27
JP2008175201A	2008-07-31
JP2006250115A	2006-09-21

Other References: