Methods to improve fuel combustion efficiency and lower exhaust pollution in spark ignited internal combustion engines

Abstract

Methods of using mixtures containing gasoline type fuels composed primarily of hydrocarbon volatiles falling in a C4-C10 range in a spark ignited internal combustion engine are described.

1 . A method to achieve reliable high air-to-fuel ignition of combustion mixtures in spark ignited internal combustion engines by using mixtures containing gasoline type fuels composed primarily of hydrocarbon volatiles falling in a C4-C10 range. 
     
     
         2 . A method to improve the fuel combustion efficiency of spark ignited internal combustion engines by using the method of  claim 1  and regulating the air-to-fuel ratio based on power required. 
     
     
         3 . A method to achieve a high reduction of exhaust pollutants from spark ignited internal combustion engines by using a gasoline type fuel composed primarily of hydrocarbon volatiles falling in a C4-C10 range. 
     
     
         4 . A method to achieve a lower engine RPM at idle in a vehicle powered by a spark ignited internal combustion engine by using as the engine fuel, a gasoline type fuel composed primarily of C4-C10 hydrocarbon volatiles falling within a C4-C10 range. 
     
     
         5 . A method to conserve energy in a spark ignited internal combustion engine by retarding the spark advance or lowering the engine compression when using a gasoline comprised primarily of hydrocarbon volatiles falling within a range of C4-C10.