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US 12,221,937 B2Granted
Engine structure
AssigneeIsuzu Motors Limited
InventorsMisao Goto, Kazunari Yamamoto, Takumi Komiyama
Life of this patent
Estimating the term…
Abstract
This engine structure includes: a cylinder block in which a cylinder bore is formed; a piston provided in the cylinder bore; a cylinder head provided to an upper portion of the cylinder block in a manner to seal the cylinder bore; and a ring that is inserted in the upper end portion of the cylinder bore and has an inner diameter that is smaller than the diameter of the cylinder. A first abradable layer that is worn down by contact with an outer peripheral surface of the piston is formed on an inner peripheral surface of the ring.
Claims6
An engine structure comprising:
- a cylinder block in which a cylinder bore is formed;
- a piston provided in the cylinder bore;
- a cylinder head provided to an upper portion of the cylinder block in a manner to seal the cylinder bore;
- and
- a ring that is inserted in an upper end portion of the cylinder bore and has an inner diameter that is smaller than a diameter of the cylinder bore, wherein
- a first abradable layer that is worn down by contact with an outer peripheral surface of the piston is formed on an inner peripheral surface of the ring, wherein
- an upper abradable layer is formed on at least a part of a circular region of the cylinder head that covers the cylinder bore.
4 more elements
An engine structure comprising:
- a cylinder block in which a cylinder bore is formed;
- a piston provided in the cylinder bore;
- and
- a cylinder head provided to an upper portion of the cylinder block in a manner to seal the cylinder bore, wherein
- a portion of the cylinder bore on an upper end side has a smaller diameter than a portion of the cylinder bore on a lower end side,
- the cylinder bore has an abradable layer having hardness that is lower than hardness of the piston, on an inner peripheral surface of the portion of the cylinder bore on the upper end side, and
- an upper abradable layer is formed on at least a part of a circular region of the cylinder head that covers the cylinder bore.
4 more elements
Dependencies are inferred from the claim text.