Procedure for Uncertainty of Measurement Determination of Spark Ignition Engine Emission Tests Petroleo Brasileiro S.A. - Cenpes

Format:

Conference/Event

Author/Creator:

de Melo, de Melo, author.

Contributor:

de Brito, Marcos Fernando Mendes

Machado, Guilherme Bastos

Paiva, Carlos Eduardo Fernandes

Conference Name:

21st SAE Brasil International Congress and Exhibition (2012-10-02 : Sao Paulo, Brazil)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2012

Summary:

Experiments in engine test cells are under the influence of several parameters and types of equipment, which may impact the test results. Many variables of interest are derived from the combination of more than one quantity, increasing the results uncertainty of the final reported value. This paper describes a detailed procedure to calculate uncertainty of measurement of emission tests using a FTIR (Fourrier Transformed Infrared) emission analyzer.A Flex-Fuel engine using gasoline and ethanol was tested under different operating conditions on an engine dynamometer equipped with automation system. For each operating condition at least four different measurements were taken.The expanded uncertainty was calculated by the combination of Type A (due to repeatability) and Type B (due to calibration, sensor resolution and others)

Notes:

Vendor supplied data

Publisher Number:

2012-36-0488

Access Restriction:

Restricted for use by site license