Fuel supply arrangement

A locomotive system comprising:

• an engine car;
• a tender car linked by a mechanical coupler to the engine car;
• and
• a fuel supply arrangement for transferring a fuel from the tender car to the engine car, the fuel system arrangement including:
• a flow line to supply the fuel from the tender car to the engine car;
• a quick disconnect coupling provided on the flow line, the quick disconnect coupling including a first poppet and a second poppet, the second poppet disposed downstream of the first poppet, the first poppet moveable between a first poppet open position and a first poppet closed position that blocks a pressure feedback line, the second poppet moveable between a second poppet open position and a second poppet closed position that blocks the flow of fuel out of the quick disconnect coupling;
• a first control system provided on the flow line configured to stop the supply of the fuel in an event of breaking of the flow line, the first control system disposed upstream of the quick disconnect coupling, the first control system including an excess flow valve having an open position and a closed position;
• and
• the pressure feedback line interconnecting the quick disconnect coupling and the excess flow valve,
• wherein the excess flow valve, the flow line and the quick disconnect coupling collectively define a portion of a fuel flow path between the tender car and the engine car, and the first and second poppets are entirely disposed in the portion of the fuel flow path,
• wherein further, the excess flow valve is in the closed position when the second poppet is in the second poppet closed position and the pressure feedback line is blocked by the first poppet.

A tender car system for a locomotive system, the tender car system comprising:

• a tank;
• a flow line fluidically connected to the tank;
• a quick disconnect coupling provided on the flow line, the quick disconnect coupling including a first poppet and a second poppet, the second poppet disposed downstream of the first poppet, the first poppet moveable between a first poppet open position and a first poppet closed position that blocks a pressure feedback line, the second poppet moveable between a second poppet open position and a second poppet closed position that blocks the flow of fuel out of the quick disconnect coupling;
• an excess flow valve provided on the flow line configured to stop the supply of the fuel in an event of breaking of the flow line, the excess flow valve having an open position and a closed position;
• and
• the pressure feedback line interconnecting the quick disconnect coupling and the excess flow valve,
• wherein the excess flow valve, the flow line and the quick disconnect coupling collectively define a portion of a fuel flow path, and the first and second poppets are entirely disposed in the portion of the fuel flow path,
• wherein further, the excess flow valve is in the closed position when the second poppet is in the second poppet closed position and the pressure feedback line is blocked by the first poppet.