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AssigneeMitsubishi Jidosha Kogyo Kabushiki Kaisha
InventorsTakeshi Moriyasu, Jun Isomoto, Tatsuro Nakagami, Hiroo Takahashi, Takuo Maeda
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In a combustion chamber structure in a direct injection type diesel engine, in order to prevent flames from flowing out to a quench zone Q from a combustion chamber (32) which opens to a top part (30a) of a piston (30) to thereby prevent cooling of the flames and also in order to prevent a fuel spray from being concentrated on a lower portion of the combustion chamber (32), the fuel spray should be reflected in the combustion chamber (32) effectively according to displacement of the piston (30) to allow it to be mixed with air sufficiently in the combustion chamber (32) or in a cylinder (28), and to this end there are provided a guide wall (34) which becomes larger in inside diameter downwardly from an opening edge portion (33) of the combustion chamber (32), as well as fuel reflection walls (36, 38) which project below the guide wall (34) toward a central axis (lo) of the combustion chamber (32) and divide the combustion chamber vertically into a first combustion chamber (44) and a second combustion chamber (48).
A combustion chamber structure in a diesel engine of a direct injection type having a cylinder block (20), a cylinder head (22) disposed above the cylinder block (20), a piston (30) fitted in a cylinder (28) of the cylinder block (20), a combustion chamber (32) which is formed as a recess in a top part (30a) of the piston (30) and whose upper surface is covered with the cylinder head (22), and a fuel injection nozzle (26) disposed in the cylinder head (22) for injecting fuel into the combustion chamber (32), characterized in that the combustion (32) is formed in the shape of a geometrical rotating body;
A diesel engine of the direct injection type comprising:
Dependencies are inferred from the claim text.