Technical Paper
Potentialities of Direct Injection in Spark Ignition Engines - from Gasoline to Ethanol
2000-12-01
2000-01-3270
The advantages of internal mixture formation regarding the important reduction of fuel consumption, respectively of the pollutant emission determined in the last years an intensive development of direct injection concepts. Superimposing the potential of direct injection with the advantages of ethanol concerning the availability and partial CO2 re-circulation, there appears to be an advantageous scenario for the future of SI engines. The paper presents a direct injection system with high pressure modulation which is able to operate with different ratios of gasoline/ethanol mixture. The paper presents furthermore a concept for modeling and optimization of the mixture formation process in the case of gasoline / ethanol direct injection.