Multi-tank connecting device for liquefied petroleum injection vehicle

A multi-tank connecting device for an LPI vehicle, comprising:

• a main tank having a fuel pump therein;
• one or more auxiliary tanks;
• a fuel pipe connecting said main tank and said auxiliary tank that allows fuel to flow between said main tank and said auxiliary tank;
• and
• a fuel isolating device closing said fuel pipe when the vehicle ascends or descends on a slope and said auxiliary tank is disposed lower than said main tank, wherein said fuel isolating device comprises:
• a housing containing a passage slanted at a certain degree;
• a ball placed inside said passage;
• a panel slidably installed in said passage and attached at the rear to a rod;
• a spring returning said panel toward said ball;
• a switch that, when contacting said rod, due to said ball's rolling onto and applying pressure on said panel when the vehicle ascends a slope, turns on;
• a throttle valve configured to open and close said fuel pipe;
• and
• a throttle valve actuator closing said fuel pipe by activating said throttle valve when said switch is turned on.