Carburetor

Details Carburetor Carburetor

F - Mech Eng,Light,Heat,Weapons

02

M

123/69

F02M 7/18 (2006.01) F02D 35/00 (2006.01) F02M 3/09 (2006.01) F02M 7/20 (2006.01)

Patent

CA 1102192

C-2919 CARBURETOR Abstract of the Disclosure A carburetor main fuel passage receives fuel both through a primary metering orifice and through a supplementary metering orifice controlled by a pulse width modulated duty cycle operated metering valve. A rich adjusting needle limits fuel flow through the supplementary metering orifice and is set to establish the high fuel flow desired through the passage at one particular value of the duty cycle, and a lean adjusting needle limits fuel flow through the primary metering orifice and is set to establish the low fuel flow desired through the passage at another particular value of the duty cycle; with this carburetor, a desired fuel flow band width is achieved over a selected range of duty cycles.

317616

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