The deterioration factors are comparable to values obtained with current conventional engines. ... The effects of modifications in cylinder head and prechamber geometry, fuel-air ratio control, combustion duration, and EGR are being examined. ... At low mileage, a Honda Civic car with manual transmission and an improved engine without EGR showed about a factor of two reduction in NO compared to xanbsp;...
|Title||:||Automotive Spark Ignition Engine Emission Control Systems|
|Author||:||National Academy of Sciences (U.S.). Emission Control Systems Panel|
|Publisher||:||National Academies - 1973|