This study presents estimates for measurement uncertainties for a Homogenous Charge Compression Ignition (HCCI)/Low-Temperature Gasoline Combustion (LTGC) engine testing facility. A previously presented framework for quantifying those uncertainties developed uncertainty estimates based on the transducers manufacturers’ published tolerances. The present work utilizes the framework with improved uncertainty estimates in order to more accurately represent the actual uncertainties of the data acquired in the HCCI/LTGC laboratory, which ultimately results in a reduction in the uncertainty from 30 to less than 1 kPa during the intake and exhaust strokes. Details of laboratory calibration techniques and commissioning runs are used to constrain the sensitivities of the transducers relative to manufacturer supplied values. The uncertainty framework is also extended to consider additional sources of uncertainty, including non-ideal engine volume history due to kinematic effects on the effective connecting rod length. Finally, the uncertainty propagation chain is analyzed to determine primary uncertainty sources, and mitigations are discussed.
Refining Measurement Uncertainties in HCCI/LTGC Engine Experiments
Sae Technical Papers
WCX World Congress Experience ; 2018
2018-04-03
Conference paper
English
SAE Technical Papers | 2017
|HCCI in the DI gasoline engine: experiments and modelling
Automotive engineering | 2002
|HCCI in a CFR engine: experiments and detailed kinetic modeling
Automotive engineering | 2000
|SAE Technical Papers | 2007
|Automotive engineering | 2007
|