Measurement of Cycle-by-Cycle AFR using a Fast Response NDIR Analyzer for Cold Start Fuelling Calibration Applications Cambustion Limited

Format:

Conference/Event

Author/Creator:

Davis, P. W., author.

Conference Name:

SAE 2006 World Congress & Exhibition (2006-04-03 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2006

Summary:

This paper examines cold start of a gasoline PFI engine using a fast λ (normalised AFR) measurement technique. The technique uses established fast gas sensing equipment and post-processing calculations to obtain λ with a response time T90-10% of 8ms.The fast λ is compared with UEGO data. Known characteristics of the UEGO include slower T90-10% and output errors when subjected to high quantities of HC; the new technique is shown to avoid these issues.Five cold starts are performed. Fast λ can resolve each cycle. Differences were seen between the UEGO and fast λ and these are attributed to the characteristics mentioned above. Good repeatability was seen over the starts and the fast λ was similarly repeatable.This data will be of importance to reduce emissions over this critical part of the drive cycle

Notes:

Vendor supplied data

Publisher Number:

2006-01-1515

Access Restriction:

Restricted for use by site license