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Liquid fuel carburetion system

  • US 4,329,964 A
  • Filed: 11/25/1980
  • Issued: 05/18/1982
  • Est. Priority Date: 03/17/1978
  • Status: Expired due to Term
First Claim
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1. A carburetion system for an internal combustion engine comprising:

  • air inlet means of fixed configuration having upstream and downstream ends;

    a fuel reservoir adapted to contain an essentially constant level of fuel therein;

    first passageway means of predetermined fluid flowing capacity, for flowing air out of said air inlet means and fuel into said air inlet means, extending between said air inlet means proximate the upstream end thereof and said fuel reservoir below the level of fuel therein;

    throttle valve means disposed in said air inlet means downstream from said first conduit means;

    second passageway means of predetermined fluid flowing capacity for flowing air and fuel from said first passageway means to said air inlet means at a location downstream from said throttle valve means;

    said second passageway means connected to said first passageway means at a location such that air flows from said air inlet means through said first passageway means into said second passageway means when the engine is at idle load conditions;

    air flow from said first passageway means into said second passageway means causing a pressure reduction of predetermined magnitude in said first passageway means;

    said predetermined fluid flowing capacity of said first passageway means being specifically proportioned to said predetermined fluid flowing capacity of said second passageway means so as to determine said magnitude of said pressure reduction; and

    said magnitude being determined such that an essentially correct amount of fuel is metered to the engine for engine operation at all speeds and loads.

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