Arrangement for controlling fuel flow to an internal-combustion engine

Abstract

An arrangement for controlling fuel flow to an internal combustion engine includes a fuel-injection pump, a fuel tank, and a mechanically driven pre-supply pump for supplying fuel from the fuel tank to the suction space of the fuel injection pump. An electromagnetic control valve located downstream of the pre-supply pump and upstream of the suction space of the fuel injection pump moves between a supply position in which fuel flows from the pre-supply pump into the suction space, and a disconnect position. A mechanically driven additional suction supply pump communicates the suction space with the fuel tank in the disconnect position of the electromagnetic control valve. The electromagnetic control valve has throttle means for communicating the suction space of the fuel injection pump with the inlet of the additional suction supply pump in the disconnect position of the electromagnetic control valve.

Dependencies are inferred from the claim text.