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Air-fuel ratio controlling system for internal combustion engine — Harley-Davidson patent US5575268A (1996)

PatentUS5575268A
TypeUtility patent
Filed1995-11-22
Granted1996-11-19
InventorKenichi Hirano
SystemFuel & air

“An air-fuel ratio control system for an internal combustion engine including a carburetor having a main fuel system, a slow fuel system, a main bleed air passage leading to the main fuel system a main bleed air control passage leading to the main fuel system, a slow bleed air passage leading to…”

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Drawings (15 sheets)

Air-fuel ratio controlling system for internal combustion engine — sheet 1Air-fuel ratio controlling system for internal combustion engine — sheet 2Air-fuel ratio controlling system for internal combustion engine — sheet 3Air-fuel ratio controlling system for internal combustion engine — sheet 4Air-fuel ratio controlling system for internal combustion engine — sheet 5Air-fuel ratio controlling system for internal combustion engine — sheet 6Air-fuel ratio controlling system for internal combustion engine — sheet 7Air-fuel ratio controlling system for internal combustion engine — sheet 8Air-fuel ratio controlling system for internal combustion engine — sheet 9Air-fuel ratio controlling system for internal combustion engine — sheet 10Air-fuel ratio controlling system for internal combustion engine — sheet 11Air-fuel ratio controlling system for internal combustion engine — sheet 12Air-fuel ratio controlling system for internal combustion engine — sheet 13Air-fuel ratio controlling system for internal combustion engine — sheet 14Air-fuel ratio controlling system for internal combustion engine — sheet 15

Parts for this system

37-2165
Ultima Air Cleaner Outer Cover Mounting Screw Set
$6.35
34-2120
Ultima Air Cleaner Backing Plate Adapter
$7.02
35-1259
Carburetor Fuel Inlet
$8.24
14-0505
Carburetor Adapter O-Ring
$8.48

Check fitment first — add your bike and we flag what fits.

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Drawing from the US patent record (via Google Patents). A patent shows the invention as filed, not necessarily the production part on your motorcycle — confirm fitment for your model and year. Independent aftermarket retailer, not affiliated with Harley-Davidson, Inc.