Patent ID: 7073525

Claim:
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.