EXHAUST SYSTEM STATE DETECTION DEVICE

Title:

EXHAUST SYSTEM STATE DETECTION DEVICE

Document Type and Number:

WIPO Patent Application WO/2015/016305

Kind Code:

A1

Abstract:

In order to provide an exhaust system state detection device with which the exhaust temperature can be detected effectively using a simple configuration, an exhaust system state detection device according to the present invention is equipped with: an intake air oxygen concentration sensor (32) that detects the intake air oxygen concentration in an engine (10); an engine rotation sensor (30) and an acceleration position sensor (31) that detect the operating state; an indicated thermal efficiency calculation unit (42) that calculates the amount of change in the indicated thermal efficiency of the engine (10) on the basis of the intake air concentration, the fuel injection start timing, and a previously stored first model equation defining the relationship between the intake air concentration, the injection start timing, and the amount of change in the indicated thermal efficiency; and an exhaust temperature calculation unit (43) that calculates the exhaust temperature of the engine (10) on the basis of the amount of change in the indicated thermal efficiency and a previously stored second model equation defining the relationship between the exhaust temperature and the amount of change in the indicated thermal efficiency.

Inventors:

HANAWA SATOSHI (JP)
IKAI YOSHIAKI (JP)

Application Number:

PCT/JP2014/070198

Publication Date:

February 05, 2015

Filing Date:

July 31, 2014

Export Citation:

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Assignee:

ISUZU MOTORS LTD (JP)
TRANSTRON INC (JP)

International Classes:

F02D21/08; F02D45/00; F02M25/07

Foreign References:

JPH03503196A	1991-07-18
JP2003065169A	2003-03-05
JP2013087673A	2013-05-13
JP2003286820A	2003-10-10
JPH11241820A	1999-09-07
JP2006266182A	2006-10-05
JP2011007131A	2011-01-13
JP2009114871A	2009-05-28

Other References: