"The major problem in diesel combustion chamber design is achieving rapid mixing between the injected fuel and the air in the cylinder to complete combusion in the appropriate crank angle interval close to top center"
- J. Heywood, MIT, 'Internal Combustion Engines', 1988
"Conventional diesel engines inject fuel late in the compression stroke into hot, compressed air, resulting in auto-ingnition. The rate of combustion is controlled by the rate at which the fuel can mix the air."
- T. Cackette, CARB, "Air and Waste Management", 2001