초록 ▼

A no-return system for supplying fuel from a tank to a fuel injected internal combustion engine of an automotive vehicle in response to the fuel demand of the engine. The pump supplies more fuel than that required by the operating engine and the excess fuel is diverted from the engine by a bypass fu

A no-return system for supplying fuel from a tank to a fuel injected internal combustion engine of an automotive vehicle in response to the fuel demand of the engine. The pump supplies more fuel than that required by the operating engine and the excess fuel is diverted from the engine by a bypass fuel pressure regulator and returned to the tank through a fluid-activatable switch movable to electrically open and closed states in response to the rate of flow of excess fuel through the switch. An electric control circuit is responsive to the state of the switch to change the magnitude of the power applied to the electric motor to change its operating speed and thereby modulate the output fuel flow rate of the pump in response to the fuel demand of the engine.

대표청구항 ▼

[ We claim:] [1.]1. An apparatus for supplying fuel in a fuel system to an internal combustion engine comprising:an electric motor for driving a fuel pump;a fuel pump having an outlet configured to deliver fuel to the engine;a bypass fuel pressure regulator communicating with the pump outlet to regu

[ We claim:] [1.]1. An apparatus for supplying fuel in a fuel system to an internal combustion engine comprising:an electric motor for driving a fuel pump;a fuel pump having an outlet configured to deliver fuel to the engine;a bypass fuel pressure regulator communicating with the pump outlet to regulate the pressure of fuel supplied to the engine and configured to divert excess fuel flow from the engine in response to the fuel demand of the engine;a fluid-activatable switch communicating with the pressure regulator and receiving the excess fuel from the pressure regulator and returning the excess fuel to a fuel tank; andan electric control circuit electrically connected to the switch, capable of being electrically connected to an electric voltage power source and to the electric motor for supplying an electric current to the electric motor;wherein said switch is manipulable into an electrically open position and an electrically closed position as determined by the rate of flow of excess fuel from the pressure regulator; andwherein said control circuit is capable of adjusting the magnitude of the power of the current supplied to the electric motor as dictated by the position of the switch such that the speed of said electric fuel pump motor is modulated in accordance with changes in the rate of flow of excess fuel and the position of the switch.