CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE

Title:

CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE

Document Type and Number:

WIPO Patent Application WO/2012/049734

Kind Code:

A1

Abstract:

This control device of an internal combustion engine is a control device capable of satisfying both the requirement related to emission performance of an internal combustion engine and the requirement related to running performance by suitably adjusting the change rate of a required air-fuel ratio in the internal combustion engine where torque and an air-fuel ratio is used as the amount of control. The control device receives the requirement related to the emission performance of the internal combustion engine and calculates an air-fuel ratio satisfying the requirement as the required air-fuel ratio. If a predetermined relaxed condition is not met, the original required air-fuel ratio is determined as a final required air-fuel ratio with no change. However, if the relaxed condition is met, a signal of the original required air-fuel ratio is processed to relax the change rate, and the required air-fuel ratio where the change rate is relaxed is determined as the final required air-fuel ratio. The relaxed condition includes that the amount of change of the original required air-fuel ratio, specifically the amount of change every calculation period is larger than a predetermined air-fuel ratio change determination value.

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Inventors:

OKAZAKI SHUNTARO (JP)
YOSHIZAKI SATOSHI (JP)
SHIBAYAMA MASASHI (JP)
SHOKATSU KAORU (JP)
KAWAKAMI HAJIME (JP)

Application Number:

PCT/JP2010/067882

Publication Date:

April 19, 2012

Filing Date:

October 12, 2010

Export Citation:

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Assignee:

TOYOTA MOTOR CO LTD (JP)
OKAZAKI SHUNTARO (JP)
YOSHIZAKI SATOSHI (JP)
SHIBAYAMA MASASHI (JP)
SHOKATSU KAORU (JP)
KAWAKAMI HAJIME (JP)

International Classes:

F02D41/04; F02D43/00; F02D45/00; F02P5/15

Foreign References:

JP2003328809A	2003-11-19
JPH06264785A	1994-09-20
JPH1122505A	1999-01-26
JPH06213039A	1994-08-02
JPS62165549A	1987-07-22

Attorney, Agent or Firm:

TAKAHASHI, Hideki et al. (JP)
Hideki Takahashi (JP)

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