Prediction of research octane number using a constant volume combustion chamber

A device comprising:

• a memory storing instructions;
• and
• a processor configured to execute the instructions to:
• obtain a research octane number for a sample;
• perform a combustion test for the sample in a constant volume combustion chamber;
• record, at a plurality of time points during the combustion test, a plurality of pressure values;
• calculate one or more values for one or more pressure parameters for the sample based on the plurality of pressure values and the plurality of time points;
• generate a research octane number mathematical function for the constant volume combustion chamber based on the determined research octane number and the calculated one or more values for the one or more pressure parameters;
• and
• use the generated research octane number mathematical function to determine a research octane number for a second sample,
• wherein, when using the generated research octane number mathematical function to determine a research octane number for the second sample, the processor is further configured to:
• perform a combustion test for the second sample in the constant volume combustion chamber,
• calculate a second set of one or more values for the one or more pressure parameters for the second sample based on the combustion test performed for the second sample, and
• determine a research octane number for the second sample based on the generated research octane number mathematical function and the calculated second set of one or more values for the one or more pressure parameters for the second sample.

A system comprising:

• a constant volume combustion chamber comprising:
• a pressure sensor configured to record a pressure inside the constant volume combustion chamber, wherein the pressure sensor includes a cooling jacket;
• and
• a controller configured to:
• perform a combustion test for a sample in the constant volume combustion chamber;
• record, at a plurality of time points during the combustion test, a plurality of pressure values using the pressure sensor;
• calculate one or more values for one or more pressure parameters based on the recorded plurality of pressure values;
• and
• determine a research octane number for the sample using a research octane number mathematical function and the calculated one or more values for the one or more pressure parameters.