Cylinder block for a two-cycle combustion engine
AssigneeKawasaki Jukogyo Kabushiki Kaisha
InventorsTsuneyoshi Yuasa, Masanori Kobayashi
Life of this patent
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Abstract
A cylinder block includes a scavenging passage, which extends between a combustion chamber and a crankcase chamber to communicate them together and has a scavenging port defined in the cylinder block so as to open at an inner peripheral surface of the cylinder block. An intake passage or exhaust passage, the scavenging passage including the scavenging port and a throughhole defined therebetween are formed by the use of a molding piece movable in a direction towards the fuel intake passage or exhaust passage and the throughhole is closed by a lid.
Claims9
A cylinder block for a two-cycle combustion engine comprising:
- a cylinder bore;
- a combustion chamber defined in the cylinder bore;
- an intake passage for charging an intake gas;
- an exhaust passage for discharging an exhaust gas from the combustion chamber;
- a scavenging passage extending between the combustion chamber and a crankcase chamber below the cylinder bore to communicate them together, and having a scavenging port defined in the cylinder bore so as to open at an inner peripheral surface forming the cylinder bore, the scavenging passage being delimited by a first side wall adjacent the intake passage, a rear wall away from the scavenging port and a second side wall adjacent the exhaust passage;
- a throughhole defined in the first or second side wall of the scavenging passage on one side adjacent the intake passage or the exhaust passage and communicating an upper portion of the scavenging passage, including the scavenging port, with the intake passage or outside of the cylinder bore;
- and
- a lid affixed to an external surface of the scavenging passage such that the throughhole is permanently sealed.
Dependencies are inferred from the claim text.