초록 ▼

An automatic shut off device for preventing air from entering the fuel system of an internal combustion engine when the fuel supply becomes low. The device provides a fuel chamber having an inlet connected to a fuel supply line, a float switch and an outlet connected to the engine fuel pump or fuel

An automatic shut off device for preventing air from entering the fuel system of an internal combustion engine when the fuel supply becomes low. The device provides a fuel chamber having an inlet connected to a fuel supply line, a float switch and an outlet connected to the engine fuel pump or fuel system. When the fuel supply falls below a preselected low level, but before the level reaches a lower inlet to a standpipe, the float switch is actuated to shut down the engine before air can enter the engine fuel system, thereby eliminating the necessity of bleeding the fuel system when the fuel supply is restored. A bleed orifice at the top of the fuel chamber allows trapped air to escape and return to the fuel tank when fuel is restored to the device.

대표청구항 ▼

In a fuel system for an internal combustion engine having fuel injection means with cutoff means, relay means connectable to one or more engine sensors and to said cutoff means, a fuel supply tank, an automatic engine air removal and a shut off device located outside said fuel supply tank and compri

In a fuel system for an internal combustion engine having fuel injection means with cutoff means, relay means connectable to one or more engine sensors and to said cutoff means, a fuel supply tank, an automatic engine air removal and a shut off device located outside said fuel supply tank and comprising: housing means forming a fuel chamber having an inlet passage adapted to be connected to said fuel supply having an outlet passage adapted to be connected to said engine fuel injection means; conduit means connected to said outlet passage and extending downwardly therefrom within said fuel chamber, said conduit means having an inlet at its lower end located below said inlet passage and; means within said chamber for sensing the level of fuel therein and for providing a signal to said relay means for stopping the engine when the fuel in said tank becomes exhausted but before the fuel in said chamber reaches a predetermined lower level within said chamber, thereby preventing air from entering said fuel injection means of the engine fuel system and; fluid retainer means at the lower end of said conduit means within said chamber for holding a quantity of fuel and thereby preventing air from entering said conduit means even if the level of fuel in said chamber should fall below the end of said conduit means.