Internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsJun Kawakami, Koji Kitano
Life of this patent
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Abstract
A compressed self-ignition type internal combustion engine includes a fuel injection nozzle provided such that a plurality of injection holes are exposed from a cylinder head of the internal combustion engine to a combustion chamber, and a plurality of hollow ducts configured such that an inlet and an outlet are exposed to the combustion chamber. The plurality of ducts are configured such that each fuel spray injected from the plurality of injection holes of the fuel injection nozzle passes from the inlet to the outlet. The internal combustion engine includes a heating device for heating at least one of the plurality of ducts.
Claims4
A compressed self-ignition type internal combustion engine configured to perform combustion by injecting fuel into a compressed combustion chamber, the internal combustion engine comprising:
- a fuel injection nozzle having a plurality of injection holes for injecting fuel, the plurality of injection holes being provided so as to be exposed from a cylinder head of the internal combustion engine to the combustion chamber;
- and
- a hollow duct provided so that an inlet and an outlet are exposed to the combustion chamber and fuel spray injected from one of the injection holes of the fuel injection nozzle passes from the inlet to the outlet,
- wherein the plurality of injection holes are provided so that each fuel spray is injected radially toward a bore wall surface of the combustion chamber,
- wherein the duct is disposed corresponding to one of the plurality of injection holes, and
- wherein the internal combustion engine includes a heating device for heating a fuel spray injected from an injection hole in which the duct is not arranged among the plurality of injection holes.
A compressed self-ignition type internal combustion engine configured to perform combustion by injecting fuel into a compressed combustion chamber, the internal combustion engine comprising:
- a fuel injection nozzle having a plurality of injection holes for injecting fuel, the plurality of injection holes being provided so as to be exposed from a cylinder head of the internal combustion engine to the combustion chamber;
- and
- a plurality of hollow ducts configured so that inlets and outlets are exposed to the combustion chamber,
- wherein the plurality of ducts are configured such that each fuel spray injected from the plurality of injection holes of the fuel injection nozzle passes from the inlet to the outlet, and
- wherein the internal combustion engine comprises a heating device for heating at least one of the plurality of ducts, without heating at least another one of the plurality of ducts,
- wherein the plurality of hollow ducts are inside the cylinder head,
- wherein the plurality of ducts includes:
- a low thermal conductivity duct, and
- a high thermal conductivity duct having a higher thermal conductivity than the low thermal conductivity duct, and
- wherein the heating device is configured to heat the high thermal conductivity duct, without heating the low thermal conductivity duct,
- wherein the cylinder head comprises:
- first and second surface portions where the outlet and inlet of the low thermal conductivity duct are located, and
- third and fourth surface portions where the outlet and inlet of the high thermal conductivity duct are located, and
- wherein a surface treatment layer covers the first and second surface portions, without covering the third and fourth surface portions.
Dependencies are inferred from the claim text.