Fuel injection apparatus for internal combustion engines

Claim 2

A multi-outlet fuel injection nozzle formed from an elongate metal tube having a continuous circumferential wall, said tube comprising a plain tubular portion and an integral end portion extending from said plain portion in the longitudinal direction thereof, at which said end portion said circumferential wall has integral inwardly deformed portions which are compressed into contact one with another and divide the interior of said end portion into a plurality of parallel, elongated passages which extend longitudinally of said end portion and form tubular injection outlets of the nozzle extending from the interior of said plain tubular portion, said outlets being of substantially constant cross-section along their lengths, and the cross-section of each said outlet tapering laterally of said tube towards said inwardly deformed portions.

Claim 3

A multi-outlet fuel injection nozzle according to claim 1 in which each said outlet has a length of the order of three-sixteenths to one-fourth inches.

Claim 4

A multi-outlet fuel injection nozzle according to claim 1 in which said tube has a bore of not less than one-fourth inch in diameter.

Claim 5

A multi-outlet fuel injection nozzle according to claim 1 in which said tube has a wall thickness of the order of 0.020 to 0.030 inches.

Claim 6

A multi-outlet injection nozzle formed from an elongate metal tube having a continuous circumferential wall, said tube comprising a plain tubular portion and an integral end portion extending from said plain portion in the longitudinal direction thereof, at which said end portion said circumferential wall has integral inwardly deformed wall portions which are compressed into contact one against another and divide the interior of said end portion into a plurality of parallel, elongated passages which extend longitudinally of said end portion and are disposed side-by-side to one another in a row, said passages forming tubular injection outlets of the nozzle which extend from the interior of said plain tubular portion and are of substantially constant croSs-section along their lengths, said cross-section of each said nozzle tapering laterally of said tube, and said cross-section of each of said outlets at the ends of said row being of tear-drop shape.

Claim 7

A multi-outlet injection nozzle formed from an elongate metal tube having a continuous circumferential wall, said tube comprising a plain tubular portion and an integral end portion extending from said plain portion in the longitudinal direction thereof, at which said end portion said circumferential wall has integral inwardly deformed wall portions which are compressed into contact one against another and divide the interior of said end portion into a plurality of parallel, elongated passages which extend longitudinally of said end portion and are disposed side-by-side to one another in a row, said passages forming tubular injection outlets of the nozzle which extend from the interior of said plain tubular portion and are of substantially constant croSs-section along their lengths, said cross-section of each said nozzle tapering laterally of said tube, and said cross-section of each of said outlets at the ends of said row being of tear-drop shape.

Claim 8

A multi-outlet fuel injection nozzle according to claim 5 in which there are at least three of said outlets, an intermediate one of said outlets disposed between said end outlets of the row being of substantially oval shape in cross-section with the ends of said oval shape tapering to shape points.

Claim 9

A multi-outlet fuel injection nozzle formed from an elongate metal tube having a continuous circumferential wall, said tube comprising a plain tubular portion and an integral end portion extending from said plain portion in the longitudinal direction thereof, at which said end portion said circumferential wall has integral inwardly deformed wall portions which are compressed into contact one against another and divide the interior of said end portion into at least three parallel, elongated passages which are angularly disposed about the main, longitudinal, axis of said tube, said passages forming tubular injection outlets of the nozzle which extend from the interior of said plain tubular portion and are of substantially constant cross-section along their lengths, said cross-section of each said outlet being of tear-drop shape, tapering laterally of said tube towards said main axis of said tube.

Claim 10

A multi-outlet fuel injection nozzle formed from an elongate metal tube having a continuous circumferential wall, said tube comprising a plain tubular portion and an integral end portion extending from said plain portion in the longitudinal direction thereof, at which said end portion said circumferential wall has integral inwardly deformed wall portions which are compressed into contact one against another and divide the interior of said end portion into at least three parallel, elongated passages which are angularly disposed about the main, longitudinal, axis of said tube, said passages forming tubular injection outlets of the nozzle which extend from the interior of said plain tubular portion and are of substantially constant cross-section along their lengths, said cross-section of each said outlet being of tear-drop shape, tapering laterally of said tube towards said main axis of said tube.

Claim 11

A multi-outlet fuel injection nozzle according to claim 7 in which said inwardly deformed wall portions make contact one with another at a distance from said main axis and the center of said end portion is left open and forms an additional injection outlet extending from the interior of said plain tubular portion parallel to said angularly disposed outlets.