EMISSIONS
Page 3C-4 90-857138R1 MAY 2000
STRATIFIED VS HOMOGENIZED CHARGE
At certain operating conditions, DFI engines use a stratified charge inside the combustion
chamber to aid in reducing emissions. All other models exclusively use a homogenized
charge. The difference between the two is:
Homogenized Charge
A homogenized charge has the air/fuel particles mixed evenly throughout the cylinder. This
mixing occurs inside the carburetor venturi, reed blocks, crankcase and/or combustion
chamber. Additional mixing occurs as the fuel is forced through the transfer system into the
cylinder. The homogenized charge has an air/fuel ratio of approximately 14.7:1 and is uni-
form throughout the cylinder.
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