the Ideal Gas Law is an equation you may or may not remember from high school chemistry.
PV = nRT
- P = Pressure (must be an Absolute Pressure scale)
- V = Volume
- n = number of moles (number of atoms) gas
- R = ideal gas constant = 8.3145 J/mol K
- T = temperature (always in degrees Kelvin for this calculation - absolute scale)
The form of the ideal gas law most applicable to engine management is n = PV / RT By solving for n, we are solving for the actual airflow into the motor as estimated by pressure, temperature and volume factors measured elsewhere.
One random googled writeup from a college class: http://www.chm.davidson.edu/ChemistryApplets/GasLaws/GasConstant.html
|
Copyright © 2002-present by the contributing authors. All material on this collaboration platform is the property of the
contributing authors, and is covered by the Non-Commercial Share-Alike License unless explicitly stated otherwise. |
|