14th IFAC Symposium on System Identification, SYSID 2006

SYSID-2006 Paper Abstract


Paper FrB6.1

Hashimoto, Seiji (Gunma Univ.), Okada, Yasushi (Utsunomiya Univ.), Okuda, Hiroyuki (Utsunomiya Univ.), Adachi, Shuichi (Utsunomiya Univ.), Niwa, Shinji (Daihatsu Motor Co., Ltd.), Kajitani, Mitsunobu (Daihatsu Motor Co., Ltd.)

Modeling and Deterioration Diagnosis of Catalyst on Vehicle by Variable Forgetting Factor-Based On-Line Identification Method

Scheduled for presentation during the Regular Session "Identification in Automotive Systems" (FrB6), Friday, March 31, 2006, 15:30−15:50, Newcastle Room

14th IFAC Symposium on System Identification, March 29 - 31, 2006, Newcastle, Australia

This information is tentative and subject to change. Compiled on September 24, 2018

Keywords Mechanical and Aerospace, Recursive Identification


The majority of the conventional system purifying exhaust gas is composed of a three-way catalyst and an electronic fuel injection. However, harmful pollutants are increasingly emitted when the catalyst becomes aged. Therefore, it is necessary to detect the deterioration of the catalyst by means of on board diagnosis. In this paper, we propose a diagnosis method of the aged catalyst using recursive system identification method with variable forgetting factor. We focus on the parameter of identified model which represents characteristics of the catalyst, and possibility to describe the diagnosis of the aged catalyst.