Abstract: A cold start fuel control system is disclosed for use with an internal combustion engine having at least one combustion chamber, a source of fuel and a primary intake manifold having an inlet and an outlet and fluidly connected between the fuel source and the combustion chamber. The system includes a cold start fuel injector assembly having an inlet and an outlet with the inlet being fluidly connected to the fuel source. An auxiliary intake manifold has an interior chamber which is fluidly connected with each combustion chamber. The outlet from the cold start fuel injector is then fluidly connected to the auxiliary intake manifold so that, upon activation of the cold start fuel injector assembly, a fuel/air is inducted from the cold start fuel injector, through the auxiliary intake manifold and into the engine combustion chambers.

Abstract: In a fuel injection apparatus of an internal combustion engine comprising a fuel injector, an intake valve device for opening and closing an intake port, and an intake air flow control device arranged in an upstream side of the intake valve device, a fuel injection is synchronized with an intake stroke of the engine. A fuel spray is oriented to an inner wall face which is positioned in an opposite side to an inner wall face of a cylinder heads in a fuel injector side and the fuel spray is transported by an air flow having a strong fluidization which is entered from the intake air control device. In a port injection lean burn engine, an adhesion to the wall face according to the fuel spray can be reduced, and a quality and a formation state of an air-fuel mixture in a cylinder can be improved.

Abstract: To realize spraying that is asymmetrical in the flow rate distribution of a sprayed fuel in order to improve the homogeneity of air-fuel mixture density during the air intake stroke injection for homogeneous combustion in an in-cylinder injection engine. By providing the exit portion of the fuel injection hole with the wall surfaces 204a, 204b, 205a, and 205b that are parallel to the central axis of the injection hole, further providing the periphery of the injection hole with an plurality of areas in which the flow of the fuel in the radial direction of the injection hole will be restrained, and an plurality of areas in which the flow of the fuel in the radial direction of the injection hole will not be restrained, and assigning a different size to each non-restraint area.

Abstract: A main passage mounting a throttle valve and an air bypass flow passage for reducing HC emission by promoting atomization of the fuel spray injected from the assembly pipe fuel injector are integrated in a body of an intake air control device arranged upstream of an assembly pipe in a one-piece structure to form a unit. Thereby, the intake air control device can be easily manufactured and easily mounted on and dismounted from the intake air system. The amount of HC emitted during warming-up operation of an internal combustion engine is reduced by efficiently supplying fuel spray injected from an assembly pipe fuel injector at the time of starting and warming-up operations for the internal combustion engine.

Abstract: In a multi-port fuel injection system for a lean burn engine, the attaching of fuel particles from the fuel spray onto a wall surface, which is a problem in atomizing injected fuel, is reduced, and the quality and shape of the mixed gas in the cylinders of the engine is improved. The engine has a fuel injector 1; an intake valve 6 for opening and closing an intake port; and an intake air flow control device 10. The injected fuel is shaped to provide a low penetration fuel spray when the engine is operated in a low load state and at a low rotation speed, and the injected fuel is shaped to provide a high penetration fuel spray when the engine is operated in a high load state and at a high rotation speed. The fuel is injected in synchronism with the intake stroke of the engine, and it is transported by the air flow flowing through the intake air flow control device 10 to suppress the attaching of fuel particles from the fuel spray onto a wall surface of the intake manifold.

Abstract: Atomizing air flowing in an atomizing gas passage is merged with a fuel spray to promote atomization of the fuel, and carrier air flowing in a carrier gas passage is merged with the fuel spray at a further downstream position so as to surround the fuel spray. By doing so, the atomized fuel spray is carried to the downstream side so as to prevent the fuel spray from adhering onto the wall surface. The starting-up performance, fuel consumption and exhaust gas cleaning of an internal combustion engine are improved in this way.

Abstract: At an outlet portion of an injection hole (8) of a fuel injection valve (1), through removal of a part (A1, 7B) of a wall forming the injection hole (8), a restriction to a spray flow is released, thereby, a deflection spray is formed in which the spray is rich at the side of restriction released and is learn at the side of restricted, accordingly, ignition property of an internal combustion engine is improved, and an optimum spray is realized which reduces exhaust amount of unburnt gas components.

Abstract: At an outlet portion of an injection hole (8) of a fuel injection valve (1), through removal of a part (A1, 7B) of a wall forming the injection hole (8), a restriction to a spray flow is eliminated, thereby, a deflection of the spray occurs in which the spray is rich at the side where this restriction is released and is lean at the side that is restricted. Thus, the ignition property of an internal combustion engine is improved, and an optimum spray is realized which reduces the amount of unburnt gas components being exhausted.

Abstract: A valve structure which works easily, does not increase production cost, can reduce dispersion in a side gap by restricting eccentricity and incline of a valve body and can maintain highly accurate injection. An electromagnetic fuel injection valve is required which is easy to manufacture even in a narrow valve structure. A guide portion is provided having one end fixed to an injection valve main body for guiding the valve member. A nozzle guide body constituting a magnetic passage portion to surround a magnetic member connected and fixed to one end of the valve member by the same material is provided. Accordingly, it is possible to reduce dispersion of a side gap constituting the magnetic passage, and it is also possible to stabilize an axial motion of the valve member, whereby high injection accuracy is maintained and an inexpensive injection valve is obtained.

Abstract: Using a cycling type fuel injection valve, form a concentrated spray area and a thin spray area, adjust the position of those, and conform the spray to the geometric shape of engine and mounting position of the fuel injection valve so as to reduce the fuel consumption and control the unburnt component in exhaust gas. The fuel injection valve is so constructed to form a step on the injection hole opening of the fuel injection valve, to have two or more edge transition portions of the injection hole opening, resulting from the step, and to cause the line connecting the edge transition portions to form an oblique angle against the wall formed by the step perpendicular to the injection hole center axis and the angled wall.

Abstract: A fuel spray is directed toward an ignition plug. To a L shape fuel injection hole outlet portion of a swirl type fuel injector L shape cut out is provided and the fuel spray is formed with a deflection fuel spray which has a strong swirl component and can inject with much quantity. Accordingly, a reduction in the discharge HC amount and the improvement in the fuel consumption can be attained.

Abstract: In an internal combustion engine, an amount of spray attaching onto an inner wall surface of an intake pipe is reduced by forming two-directional spray of highly atomized fuel. The highly atomized two-directional spray can be obtained by a spray forming means which is constructed by piling a fuel in-plate 13 forming fuel passages, a swirl plate 14 forming fuel passage for adding swirl forces to the fuel, and an injection plate 15 for determining injection directions of the fuel. Further, penetrations of the sprays injected toward two directions are made different from each other.

Abstract: There is required a valve structure which can be easily worked, does not increase a producing cost, can reduce a dispersion in a side gap by restricting an eccentricity and an incline of a valve body and can maintain an injection accuracy high. In particular, there is required an electromagnetic fuel injection valve which is advantageous in view of production even in a narrow valve structure. In the electromagnetic fuel injection valve, at least one guide portion having one end fixed to an injection valve main body and guiding an axial sliding motion of the valve member in the inner portion is provided, and a nozzle guide body constituting a magnetic passage portion formed so as to surround a magnetic member connected and fixed to one end of the valve member by the same material is provided.

Abstract: In a spray characteristic in a direct injection system gasoline engine use electromagnetic system fuel injector, to a piston cavity a mixture of fuel and air having a combustible concentration is converged and making rich the mixture having the combustible concentration at a side of ignition plug, then an ignition performance is improved and making thin the mixture of fuel and air to a piston direction a combustion performance is improved, namely it is necessary to generate a flat inclined spray. A part of a wall face for forming the injection hole at an outlet portion of the injector is formed with V groove according to two inclination faces with optional angles against a center axial line of the injection hole or a substantially recess shape step-wise rectangular groove having different cut-off depths.

Abstract: A main passage mounting a throttle valve and an air bypass flow passage for reducing HC emission by promoting atomization of the fuel spray injected from the assembly pipe fuel injector are integrated in a body of an intake air control device arranged upstream of an assembly pipe in one-piece structure to form a unit. Thereby, the intake air control device can be easily manufactured, and easily mounted on and dismounted from the intake air system. An amount of HC emitted at warming-up operation of an internal combustion engine is reduced by efficiently supplying fuel spray injected from an assembly pipe fuel injector at starting and warming-up operations to the internal combustion engine.

Abstract: Atomizing air flowing in an atomizing gas passage is merged with fuel spray to promote atomization of the fuel, and carrier air flowing in a carrier gas passage is merged with the fuel spray at a further downstream position so as to surround around the fuel spray. By doing so, the atomized fuel spray is carried to the downstream side so as to prevent the fuel spray from adhering onto the wall surface. Starting-up performance, fuel consumption and exhaust gas cleaning of an internal combustion engine are improved.

Abstract: In a port fuel injection lean burn engine, attaching of fuel spray onto a wall surface, which is a problem at atomizing injected fuel, is reduced, and the quality and shaping state of the mixed gas in cylinders of the engine is improved.

Abstract: In a fuel injection apparatus of an internal combustion engine comprising a fuel injector, an intake valve device for opening and closing an intake port, and an intake air flow control device arranged in an upstream side of the intake valve device, a fuel injection is synchronized with an intake stroke of the engine. A fuel spray is oriented to an inner wall face which is positioned in an opposite side to an inner wall face of a cylinder heads in a fuel injector side and the fuel spray is transported by an air flow having a strong fluidization which is entered from the intake air control device. In a port injection lean burn engine, an adhesion to the wall face according to the fuel spray can be reduced, and a quality and a formation state of an air-fuel mixture in a cylinder can be improved.