UST101202I4 - Carburetor idle system air/fuel ratio control - Google Patents

Carburetor idle system air/fuel ratio control Download PDF

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Publication number
UST101202I4
UST101202I4 US06/219,558 US21955880A UST101202I4 US T101202 I4 UST101202 I4 US T101202I4 US 21955880 A US21955880 A US 21955880A US T101202 I4 UST101202 I4 US T101202I4
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United States
Prior art keywords
idle
air
fuel
tube
size
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Pending
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US06/219,558
Inventor
John H. Furbacher
Edwin K. Ratledge
Richard A. Ullmann
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Individual
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Individual
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Priority to US06/219,558 priority Critical patent/UST101202I4/en
Application granted granted Critical
Publication of UST101202I4 publication Critical patent/UST101202I4/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M3/00—Idling devices for carburettors
    • F02M3/08—Other details of idling devices
    • F02M3/12—Passageway systems

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of The Air-Fuel Ratio Of Carburetors (AREA)

Abstract

A carburetor is provided with a separate idle air/fuel system containing an idle fuel metering jet or orifice; and an idle fuel tube connected to an induction passage discharge port downstream of the throttle valve, the idle fuel tube being surrounded or enclosed near the discharge end by an air well connected to a main air bleed, this portion of the idle tube having air bleed holes for mixing air with the fuel to provide acceptable driveability during idle speed operation, the diameter of the holes being mathematically calculatable to vary in a direct relation to the size of the idle metering jet and in an inverse relation to the diameter of the idle air well tube, to provide an essentially constant air/fuel ratio to the idle mixture flow upon changes in either the idle jet size or the idle tube size.
US06/219,558 1979-10-05 1980-12-23 Carburetor idle system air/fuel ratio control Pending UST101202I4 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US06/219,558 UST101202I4 (en) 1979-10-05 1980-12-23 Carburetor idle system air/fuel ratio control

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US8235179A 1979-10-05 1979-10-05
US06/219,558 UST101202I4 (en) 1979-10-05 1980-12-23 Carburetor idle system air/fuel ratio control

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US8235179A Continuation 1979-10-05 1979-10-05

Publications (1)

Publication Number Publication Date
UST101202I4 true UST101202I4 (en) 1981-11-03

Family

ID=22170656

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/219,558 Pending UST101202I4 (en) 1979-10-05 1980-12-23 Carburetor idle system air/fuel ratio control

Country Status (1)

Country Link
US (1) UST101202I4 (en)

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