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US 2006/0137666 A1Published application
Combustion chamber structure of an internal combustion engine
AssigneeMitsubishi Jidosha Kogyo Kabushiki Kaisha
InventorsDaisuke Kitada, Toshinobu Natori, Kunio Hatada, Haruaki Yoneda, Kenzo Kubo
Life of this patent
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Abstract
A squish surface having the shape of a plane surface orthogonal to the axis of a piston is formed on the intake side of the piston top surface. A squish area is formed between the squish surface and a plane surface-shaped squish surface on the cylinder head side, and at the same time, a squish guide surface is formed in the piston top surface so as to be continuously ridged from the squish surface toward the vicinity of a spark plug.
Claims7
A combustion chamber structure of an internal combustion engine comprising:
- a plane surface portion formed in at least either one of a region stretching from an intake-side edge of a top surface of a piston to the vicinity of a position corresponding to an intake port and a region stretching from an exhaust-side edge of said top surface of the piston to the vicinity of a position corresponding to an exhaust port so as to be orthogonal to an axis of the piston, said plane surface portion forming a squish area in consort with a flat portion formed in a lower surface of a cylinder head at around the compression top dead center of said piston so as to sandwich said squish area therebetween;
- a conical tapered portion formed in a rim of said top surface of the piston except for said plane surface portion;
- a ridge portion that is continuously ridged from said plane surface portion toward the vicinity of a spark plug disposed in a combustion chamber;
- and
- a recessed portion formed to be surrounded by said tapered portion and said ridge portion.
2 more elements
Dependencies are inferred from the claim text.