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US 5,329,905 AGranted
Fuel injection type internal combustion engine
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsYuji Kawaguchi, Makoto Kishida
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AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsYuji Kawaguchi, Makoto Kishida
Estimating the term…
A fuel injection type internal combustion engine includes a cylinder head which is provided with a pair of intake valve bores facing a combustion chamber, a single intake passage, and a pair of intake ports between which a partition wall is interposed and which connect the intake passage and the intake valve bores to each other, and a fuel injection valve with a fuel ejection port disposed to be directed from the single intake passage toward the intake valve bores. Air assist ejection ports are disposed near the fuel ejection port for finely atomizing the fuel and are disposed at opposite sides of the fuel ejection port on a plane substantially including the fuel ejection port and that end edge of the partition wall which is closer to the intake passage, so that the air assist injection directions intersect each other and the fuel jet. This ensures that the fuel jet is narrowed in width at a portion corresponding to the partition wall by air flows from opposite sides, so that the entire fuel jet is flattened. Therefore, the narrowing of the width of the fuel jet at the portion corresponding to the partition wall makes it possible to suppress the deposition of the fuel on the partition wall and to suppress the deposition of the fuel on inner surfaces of the intake ports in the vicinity of their connections with the partition wall.
A fuel injection type internal combustion engine having a cylinder head which is provided with a pair of intake valve bores facing a combustion chamber, a single intake passage, and a pair of intake ports which are separated by a partition wall and which connect the intake passage to both the intake valve bores, and a fuel injection valve having a single fuel ejection port disposed to be directed from the intake passage toward the two intake valve bores, a pair of air assist ejection ports being disposed in the vicinity of the fuel ejection port for finely atomizing fuel from the fuel ejection port, said air assist ejection ports are disposed at opposite sides of said fuel ejection port to lie on a first plane that extends substantially perpendicular to a second plane on which the pair of intake ports lie, said fuel ejection port and an end edge of said partition wall which is closer to said intake passage being substantially included in said first plane, a pair of assist air flows from the pair of air assist ejection ports being directed to intersect each other at such a specific angle that intersection of the assist air flows controls the fuel ejected from the fuel ejection port so as to be atomized and change the shape of the pattern of fuel ejected from the fuel ejection port to flow into a cocoon shape substantially conforming to the shape of the pari of intake ports.
Dependencies are inferred from the claim text.