Molecular diffuser assembly

Apparatus for delivering a fuel/air mixture to the induction system of a combustion chamber, said apparatus comprising;

• structure presenting a passageway adapted for communication with said induction system and having an air-receiving inlet;
• means for deriving information indicative of the mass flow rate of an airstream drawn through said passageway by said induction system upon demand therefor by said combustion chamber;
• evaporator means for vaporizing liquid fuel supplied thereto;
• conduit means extending from said evaporator means and communicating with said passageway at a region thereof adjacent said inlet for introducing vaporized fuel into said airstream for diffusion of the same to provide said fuel/air mixture;
• regulator means interposed in said conduit means and responsive to the mass flow rate information from said deriving means for controlling a flow of said vaporized fuel from said conduit means into the airstream in accordance with said demand;
• a valve body;
• means for defining a port through said valve body as presented by first and second valve members having channels in a preferred alignment therebetween;
• means for relatively moving said channels of said valve members from said preferrably aligned position whereby to adjust the size of said port through said valve body from said preferred position;
• means for positioning said valve body in said conduit means for flow of said vaporized fuel therethrough in an amount corresonding to said size of said port;
• and
• a first means for controlling said relative movement of at least one of said valve members in response to changes in the ambient air pressure surrounding said combustion chamber whereby said movement of said at least one valve member adjusts the size of said port formed by said first and second valve members.

In an internal combustion engine having a manifold, a venturi, a source of fuel, a first flow passage for fuel leading from the source of fuel to said venturi, and a second flow passage in fluid communication with the ambient air and said manifold, said second flow passage passing through said venturi, and a mixture control valve for regulating the flow of fuel along said first flow passage between said source of fuel and said venturi, said mixture control valve comprising:

• a valve body,
• means for defining a port through said valve body, said port defining means includes first and second members and means for mounting each of said members for movement relative to each other and said valve body, said first and second members having respective channels therethrough collectively defining said port wherein relative movement of said first and second members progressively adjusts the size of the port by aligning and progressively misaligning said channels,
• means for positioning said valve body in said fuel flow passage with said fuel flowing through said port,
• first means for automatically adjusting the size of said port in response to changes in the ambient air pressure adjacent the engine, and,
• second means for automatically adjusting the size of said port in reponse to changes in the manifold pressure of said engine.