Electrical fuel injection system for internal combustion engines

Claim 2

In an electrical fuel injection system for internal combustion engines wherein the fuel requirement of an engine is electrically computed by an electronic computing circuit so that the regular electromagnetic injection valves are energized to inject the fuel by pulse signals the time width of which corresponds to the fuel requirement, and wherein a starting electromagnetic injection valve is provided to atomize and inject, independently and exclusively of the regular electromagnetic injection valves, an engine starting fuel when starting the engine, the combination comprising a start detector for detecting the start of the engine and for generating an output signal, and a circuit means connected with said start detector for receiving said output signal of said start detector for preventing the operation of the regular electromagnetic injection valves and for energizing only the starting electromagnetic injection valve to thereby provide an atomized fuel to said engine when said engine is starting.

Claim 3

In an electrical fuel injection system for internal combustion engines wherein the fuel requirement of an engine is electrically computed by an electronic computing circuit so that the regular electromagnetic injection valves are energized to inject the fuel by pulse signals the time width of which corresponds to the fuel requirement, and whereIn a starting electromagnetic injection valve is provided to atomize and inject, independently and exclusively of the regular electromagnetic injection valves, an engine starting fuel when starting the engine, the combination comprising a start detector for detecting the start of the engine and for generating an output signal when said engine is being started, a temperature detector for detecting the temperature of the engine, said detector generating an output signal when the engine temperature is lower than a preset value, and a circuit means connected with said start detector and said temperature detector for preventing the operation of the regular electromagnetic injection valves and for energizing only the starting electromagnetic injection valve when said output signals of said start detector and said temperature detector are simultaneously generated.

Claim 4

In an electrical fuel injection system for internal combustion engines wherein the fuel requirement of an engine is electrically computed by an electronic computing circuit so that the regular electromagnetic injection valves are energized to inject the fuel by pulse signals the time width of which corresponds to the fuel requirement, and whereIn a starting electromagnetic injection valve is provided to atomize and inject, independently and exclusively of the regular electromagnetic injection valves, an engine starting fuel when starting the engine, the combination comprising a start detector for detecting the start of the engine and for generating an output signal when said engine is being started, a temperature detector for detecting the temperature of the engine, said detector generating an output signal when the engine temperature is lower than a preset value, and a circuit means connected with said start detector and said temperature detector for preventing the operation of the regular electromagnetic injection valves and for energizing only the starting electromagnetic injection valve when said output signals of said start detector and said temperature detector are simultaneously generated.

Claim 5

An electrical fuel injection system according to claim 1, wherein said circuit comprises: a logic gate circuit having a first input terminal connected to said electronic computing circuit, a second input terminal connected to said start detector, and a first output terminal connected to said regular electromagnetic injection valves; and an inverter circuit having an input terminal connected to said start detector, and an output terminal connected to said starting electromagnetic injection valve.

Claim 6

The electrical fuel injection system of claim 1 wherein said circuit comprises: gating means coupling the output of said electronic computing circuit with said regular electromagnetic injection valve, means response to the output of said start detector for inhibiting said gating means when said internal combustion engine is being started and for enabling said gating means after said internal combustion engine is started, and gating means responsive to the output signal of said start detector for energizing the starting electromagnetic valve.

Claim 7

The electrical fuel injection system of claim 2 wherein said circuit comprises: a logic gating circuit having a first input terminal connected to said electronic computing circuit, an inverter having an input terminal connected to said start detector and an output terminal connected to the other input terminals of said logic gating circuit, said logic gating circuit having an output terminal connected to said regular electromagnetic injection valve wherein said logic gating circuits are inhibited when the output signals of said start detector and said temperature detector are simultaneously generated and wherein said logic gating circuits are enabled when said engine is started or said engine temperature goes above a preset level.

Claim 8

The electrical fuel injection system of claim 2 wherein said circuit comprises gating means coupling the output of said electronic computing circuit with said regular electromagnetic valve, means responsive to the output of said start detector and said temperature detector for inhibiting said gating means when said internal combustion engine is being started and the temperature of said engine is below a preset level, and for enabling said gating means after said engine is started or the temperature of said engine goes above said preset level, and means responsive to the output signal of said start detector and said temperature detector for energizing the starting electromagnetic valve when said engine is being started and when the temperature is below a preset level.