Abstract: A fuel injection valve for injecting fuel radially includes a valve housing and a valve member. The housing includes fuel nozzle holes arranged in a circumferential direction with a common pitch on a common imaginary circle. Each nozzle hole is inclined toward an outer peripheral side from a fuel inlet to outlet. The nozzle holes have a common shape around their hole axes. The nozzle holes are classified into any of nozzle hole groups. Each group includes at least two of the nozzle holes, which are arranged in a predetermined order with different inclination angles of their hole axes relative to the central axis of the housing. The order of the arrangement of the at least two of the nozzle holes is set at a common order toward one side in the circumferential direction, among the groups.

Abstract: A fuel injection valve for injecting fuel radially includes a valve housing and a valve member. The housing includes fuel nozzle holes arranged in a circumferential direction with a common pitch on a common imaginary circle. Each nozzle hole is inclined toward an outer peripheral side from a fuel inlet to outlet. The nozzle holes have a common shape around their hole axes. The nozzle holes are classified into any of nozzle hole groups. Each group includes at least two of the nozzle holes, which are arranged in a predetermined order with different inclination angles of their hole axes relative to the central axis of the housing. The order of the arrangement of the at least two of the nozzle holes is set at a common order toward one side in the circumferential direction, among the groups.

Abstract: A fuel injection system, and a structure for mounting a fuel injection valve to an internal combustion engine, that includes: a combustion chamber formed at an end surface of a piston that reciprocates in a cylinder; an intake port through which intake air drawn into the combustion chamber flows; and an intake valve that opens and closes a connection between the intake port and the combustion chamber, the fuel injection valve being placed to inject fuel into intake air in the intake port, wherein an end portion of the fuel injection valve located on a combustion chamber side thereof is placed at a location that overlaps with an imaginary plane perpendicular to a center axis of the cylinder and extends along a portion of a wall surface of the intake port where the intake valve protrudes, or is projected out from the imaginary plane toward the combustion chamber.

Abstract: An internal combustion engine has multiple cylinders each provided with multiple injectors. A fuel supply pipe device includes multiple fuel passages, which receive fuel through multiple fuel paths and supply the fuel correspondingly to the multiple injectors. The multiple fuel passages are separated respectively from the multiple fuel passages.

Abstract: A combustion chamber side end portion of a fuel injection valve is placed at a location that overlaps with an imaginary plane, which is perpendicular to a center axis of a cylinder and extends along a portion of a wall surface of an intake port where an intake valve protrudes, or is projected out from the imaginary plane toward a combustion chamber. Alternatively, a center of a fuel injecting side end port of the fuel injection valve, which injects fuel into intake air that flows in a branch port branched from the intake port, may be placed on the center axis side of the intake valve in a radial direction of the cylinder. Further alternatively, an upstream side fuel injection valve may inject fuel into intake air that flows in the intake port, and a downstream side fuel injection valve may inject fuel into intake air that flows in the branch port branched from the intake port.

Abstract: A fuel supply system supplies composite fuel containing alcohol and gasoline to multiple cylinders of an internal combustion engine. The composite fuel includes main-fuel and sub-fuel. The sub-fuel is lower than main-fuel in concentration of alcohol. Each of multiple first fuel injection valves is provided to each of the cylinders for injecting fuel. Each of multiple second fuel injection valves is provided to each of the cylinders for injecting fuel. A fuel inlet portion supplies at least sub-fuel to each of the first fuel injection valves and each of the second fuel injection valves. A selector control unit selects one of main-fuel and sub-fuel supplied through the fuel inlet portion to each of the first fuel injection valves.

Abstract: A cylinder of an internal combustion engine is communicated with intake ports. Each of intake valves and each of fuel injection valves are provided to a corresponding one of the intake ports to inject fuel into a combustion chamber through a curved portion and an opening of the corresponding intake port. An injection axis of each fuel injection valve intersects with a surface of the corresponding intake valve placed in a close position at an intersecting point that is located on an upstream side of a central axis of the corresponding intake valve.

Abstract: A nozzle device has a nozzle holes for injecting sprays grouped into spray groups respectively in injection directions. The nozzle device has an injection axis extending through the center in the thickness direction thereof. The injection axis perpendicularly intersects with an imaginary plane, which is at a predetermined distance from the nozzle device. The nozzle holes respectively have passage axes from which imaginary lines are respectively extended. The imaginary plane and the imaginary lines therebetween have intersections respectively defining outer intersections and an inner intersection in at least one of the spray groups. Each of the nozzle holes is inclined at an inclination angle being determined in such a manner that: the outer intersections exist in a polygon or a circle, and the inner intersection exists inside the outer intersections.

Abstract: A combustion chamber side end portion of a fuel injection valve is placed at a location that overlaps with an imaginary plane, which is perpendicular to a center axis of a cylinder and extends along a portion of a wall surface of an intake port where an intake valve protrudes, or is projected out from the imaginary plane toward a combustion chamber. Alternatively, a center of a fuel injecting side end port of the fuel injection valve, which injects fuel into intake air that flows in a branch port branched from the intake port, may be placed on the center axis side of the intake valve in a radial direction of the cylinder. Further alternatively, an upstream side fuel injection valve may inject fuel into intake air that flows in the intake port, and a downstream side fuel injection valve may inject fuel into intake air that flows in the branch port branched from the intake port.

Abstract: A combustion chamber side end portion of a fuel injection valve is placed at a location that overlaps with an imaginary plane, which is perpendicular to a center axis of a cylinder and extends along a portion of a wall surface of an intake port where an intake valve protrudes, or is projected out from the imaginary plane toward a combustion chamber. Alternatively, a center of a fuel injecting side end port of the fuel injection valve, which injects fuel into intake air that flows in a branch port branched from the intake port, may be placed on the center axis side of the intake valve in a radial direction of the cylinder. Further alternatively, an upstream side fuel injection valve may inject fuel into intake air that flows in the intake port, and a downstream side fuel injection valve may inject fuel into intake air that flows in the branch port branched from the intake port.

Abstract: A fuel supply system supplies composite fuel containing alcohol and gasoline to multiple cylinders of an internal combustion engine. The composite fuel includes main-fuel and sub-fuel. The sub-fuel is lower than main-fuel in concentration of alcohol. Each of multiple first fuel injection valves is provided to each of the cylinders for injecting fuel. Each of multiple second fuel injection valves is provided to each of the cylinders for injecting fuel. A fuel inlet portion supplies at least sub-fuel to each of the first fuel injection valves and each of the second fuel injection valves. A selector control unit selects one of main-fuel and sub-fuel supplied through the fuel inlet portion to each of the first fuel injection valves.

Abstract: An internal combustion engine has multiple cylinders each provided with multiple injectors. A fuel supply pipe device includes multiple fuel passages, which receive fuel through multiple fuel paths and supply the fuel correspondingly to the multiple injectors. The multiple fuel passages are separated respectively from the multiple fuel passages.

Abstract: A cylinder of an internal combustion engine is communicated with intake ports. Each of intake valves and each of fuel injection valves are provided to a corresponding one of the intake ports to inject fuel into a combustion chamber through a curved portion and an opening of the corresponding intake port. An injection axis of each fuel injection valve intersects with a surface of the corresponding intake valve placed in a close position at an intersecting point that is located on an upstream side of a central axis of the corresponding intake valve.

Abstract: A nozzle device has a nozzle holes for injecting sprays grouped into spray groups respectively in injection directions. The nozzle device has an injection axis extending through the center in the thickness direction thereof. The injection axis perpendicularly intersects with an imaginary plane, which is at a predetermined distance from the nozzle device. The nozzle holes respectively have passage axes from which imaginary lines are respectively extended. The imaginary plane and the imaginary lines therebetween have intersections respectively defining outer intersections and an inner intersection in at least one of the spray groups. Each of the nozzle holes is inclined at an inclination angle being determined in such a manner that: the outer intersections exist in a polygon or a circle, and the inner intersection exists inside the outer intersections.

Abstract: A fluid injection nozzle has an injection port plate, an injection port and a protruding portion. The injection port plate is to be mounted on a downstream end of a fluid injection valve so that a center axis thereof is coaxial to the fluid injection valve. The injection port penetrates the injection port plate between an inlet and an outlet. The protruding portion protrudes from an inner surface of the injection port to shift a direction of at least a part of a fluid flow passing through the injection port to flow in a circumferential direction of the inner surface.

Abstract: A fluid injection nozzle has an injection port plate, an injection port and a protruding portion. The injection port plate is to be mounted on a downstream end of a fluid injection valve so that a center axis thereof is coaxial to the fluid injection valve. The injection port penetrates the injection port plate between an inlet and an outlet. The protruding portion protrudes from an inner surface of the injection port to shift a direction of at least a part of a fluid flow passing through the injection port to flow in a circumferential direction of the inner surface.