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Liquefied propane carburetor modification system

  • US 4,369,751 A
  • Filed: 08/13/1980
  • Issued: 01/25/1983
  • Est. Priority Date: 08/13/1980
  • Status: Expired due to Term
First Claim
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1. In an internal combustion engine having an engine block, at least one combustion chamber, an intake manifold for channeling fuel to said combustion chamber and a carburetor mounted on said intake manifold, the improvement comprising a storage tank for storing liquefied gaseous fuel;

  • a regulator and vaporizer means for vaporizing said liquefied gaseous fuel and regulating the flow of said liquefied gaseous fuel, said vaporizer and regulator means including a first chamber for receiving said liquefied gaseous fuel from said tank, said first chamber having a first outlet port containing a gaseous fuel flow regulator, said first outlet port being connected to said intake manifold, and a second chamber containing a second outlet port, said second chamber being divided into upper and lower portions by a diaphragm, valve means actuated by said diaphragm for selectively communicating said second chamber with said first chamber; and

    mixer means connected to said carburetor, said mixer means having an inlet port connected to said second outlet port for receiving gaseous fuel therefrom and mixing said gaseous fuel with combustion air, said mixer means defining a venturi structure including large cross sectional area inlet and outlet ends and a smaller cross sectional area midportion intermediate said large cross sectional area ends and further defining a gas receiving chamber disposed substantially entirely about said venturi passage and with which said inlet port is communicated, said smaller cross sectional area midportion of said venturi structure including at least a substantially continuously peripheral slot formed therein opening outwardly from the outer periphery of said smaller cross sectional area midportion into the immediately surrounding portions of said gas receiving chamber and communicating the latter with the outer periphery of the smaller cross sectional area venturi midportion, said large cross-sectional area outlet end being communicated with said intake manifold and said large cross sectional area inlet end being adapted to receive filtered induction air.

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