SAE J1829_201503

1. SCOPE
2. REFERENCES
3. EQUIVALENCE RATIOS
4. ATOMIC WEIGHTS AND COMPOSITION OF FUELS
    AND AIR
5. CALCULATION OF STOICHIOMETRIC AIR-FUEL RATIOS
    OF HYDROCARBONS
6. CALCULATION OF STOICHIOMETRIC AIR-FUEL RATIOS
    OF OXYGENATES
7. CALCULATION OF STOICHIOMETRIC AIR-FUEL RATIOS
    OF FUELS CONTAINING SULFUR
8. CALCULATION OF STOICHIOMETRIC AIR-FUEL RATIOS
    OF FUELS CONTAINING NITROGEN
9. CALCULATION OF STOICHIOMETRIC AIR-FUEL RATIOS
    OF FUELS CONTAINING WATER
10. FUELS WITHOUT CARBON ATOMS
11. EFFECT OF HUMIDITY IN AIR
12. NOTES
APPENDIX A

Specifies the computation of stoichiometric air-fuel ratios from a knowledge of a composition of air and the elemental composition of the fuel without a need for any information on the molecular weight of the fuel.

The mass of air required to burn a unit mass of fuel with no excess of oxygen or fuel left over is known as the stoichiometric air-fuel ratio. This ratio varies appreciably over the wide range of fuels - gasolines, diesel fuels, and alternative fuels - that might be considered for use in automotive engines.Although performance of engines operating on different fuels may be compared at the same air-fuel ratio or same fuel-air ratio, it is more appropriate to compare operation at the same equivalence ratio, for which a knowledge of stoichiometric air-fuel ratio is a prerequisite.This SAE Recommended Practice summarizes the computation of stoichiometric air-fuel ratios from a knowledge of a composition of air and the elemental composition of the fuel without a need for any information on the molecular weight of the fuel.