Detection of Deteriorated Catalyst on Vehicle under Actual Operation Conditions: Application of FFT Analysis to Signal Wave by the Dual Oxygen Sensors Method National Traffic Safety and Environment Laboratory

Format:

Conference/Event

Author/Creator:

Yamamoto, Toshiro, author.

Conference Name:

JSAE/SAE International Fuels & Lubricants Meeting (2007-07-23 : Kyoto, Japan)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2007

Summary:

The object of this study is to investigate an on-board diagnostic method to detect the deterioration of a three-way catalyst (TWC) under actual vehicle operating conditions, including the acceleration state. The signal data of two oxygen sensors were processed by the fast Fourier transformation (FFT) method. As a result, we found that the power spectrum of the signal waves can be the index of catalyst deterioration degree. Furthermore, it was confirmed that the difference between the power spectrum of the upstream oxygen sensor signal and one of the downstream oxygen sensor signal named ΔPower is effective index for detection of deteriorated catalyst under acceleration conditions

Notes:

Vendor supplied data

Publisher Number:

2007-01-1927

Access Restriction:

Restricted for use by site license