US 12,221,937 B2
Engine structure
Misao Goto, Fujisawa (JP); Kazunari Yamamoto, Fujisawa (JP); and Takumi Komiyama, Fujisawa (JP)
Assigned to ISUZU MOTORS LIMITED, Kanagawa (JP)
Filed by ISUZU MOTORS LIMITED, Yokohama (JP)
Filed on Mar. 1, 2024, as Appl. No. 18/593,531.
Claims priority of application No. 2023-036278 (JP), filed on Mar. 9, 2023.
Prior Publication US 2024/0301838 A1, Sep. 12, 2024
Int. Cl. F02F 1/00 (2006.01)
CPC F02F 1/004 (2013.01) 6 Claims
OG exemplary drawing
 
1. 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.