Dual tank simultaneous fill system

A fuel supply system for an automotive vehicle of the type having an internal combustion engine, comprising:

• a fluid inlet line configured to receive fuel from a vehicle refueling station;
• a manifolded Y-connector comprising an inlet port at an upper end of the Y-connector and in fluid communication with the fluid inlet line,
• a lower wall having an elliptical cross section,
• a manifolded section extending from the inlet port to the elliptical lower wall, and
• a first and a second outlet port having substantially equal circular cross sections and each having a straight portion extending perpendicularly from the lower wall, wherein the size of the lower wall is minimized to accommodate the depending first and second outlet ports, and
• wherein a height of the manifolded section from the upper end to the lower wall is approximately four to five times a diameter of one of the first and second outlet ports;
• a first fuel tank;
• a first branch line fluidly connected to the first outlet port of the manifolded Y-connector and to the first fuel tank;
• a second fuel tank;
• a second branch line fluidly connected to the second outlet port of the manifolded Y-connector and to the second fuel tank;
• whereupon filling the fuel supply system, the manifolded Y-connector operates to deliver fuel to the first fuel tank first and the second fuel tank second and accommodates any filling turbulence.