Octane Sensitivity in Gasoline Fuels Containing Nitro-Alkanes: A Possible Means of Controlling Combustion Phasing for HCCI

2009-01-0301

04/20/2009

Event
SAE World Congress & Exhibition
Authors Abstract
Content
Addition of nitroalkanes to gasoline is shown to reduce the octane quality. The reduction in the Motor Octane Number (MON) is greater than the reduction in the Research Octane Number (RON). In other words addition of nitroalkanes causes an increase in octane sensitivity.
The temperature of the compressed air/fuel mixture in the MON test is higher then in the RON test. Through chemical kinetic modelling, we are able to show how the temperature dependence of the reactions responsible for break-up of the nitroalkane molecule can lead to an increase in octane sensitivity.
Results are presented from an Homogenous Charge Compression Ignition (HCCI) engine with a homogeneous charge in which the air intake temperature was varied. When the engine was operated on gasoline-like fuels containing nitroalkanes, it was observed that the combustion phasing was much more sensitive to the air intake temperature. This suggests a possible means of controlling combustion phasing for HCCI.
Meta TagsDetails
DOI
https://doi.org/10.4271/2009-01-0301
Pages
7
Citation
Cracknell, R., Head, R., McAllister, L., and Andrae, J., "Octane Sensitivity in Gasoline Fuels Containing Nitro-Alkanes: A Possible Means of Controlling Combustion Phasing for HCCI," SAE Technical Paper 2009-01-0301, 2009, https://doi.org/10.4271/2009-01-0301.
Additional Details
Publisher
Published
Apr 20, 2009
Product Code
2009-01-0301
Content Type
Technical Paper
Language
English