OVERBASED METALLIC SALT DIESEL FUEL ADDITIVE COMPOSITIONS FOR IMPROVEMENT OF PARTICULATE TRAPS

摘要

PURPOSE: A metal salt additive composition is provided which has been found highly effective in improving the quality of emissions from the combustion of diesel fuels. CONSTITUTION: In a fuel additive metallic salt composition effective in improving the operation of diesel engine particulate traps when added to a diesel fuel so as to provide 1-25 ppm metal in the fuel which comprises at least one oil soluble or oil dispersible overbased metal salt of an acidic organic compound, the salt composition contains 5-85 wt.% of a stoichiometric excess of metal over that required to neutralize the anionic portion of the salt, wherein the metal is selected from the group consisting of Ca, Fe, Mg, Sr, Na, Ti, Zr, Mn, Zn and Ce.