Title:
対向ピストンエンジンのシリンダボア表面構造
Document Type and Number:
Japanese Patent JP7264822
Kind Code:
B2
Abstract:
A cylinder for an internal combustion opposed-piston engine includes a bore, either as part of the cylinder directly or of a liner. The bore has a surface for guiding a pair of pistons disposed for opposing movement in the cylinder. The cylinder bore has three zones of surface finishes: an inner zone extending between and including exhaust and intake ports, where only piston compression rings travel on the bore surface; two instances of an outer zone where only piston oil control rings travel on the bore surface; and two instances of a port zone where both types of rings travel on overlapping paths in the same bore surface portion. Each zone may have a particular surface finish that is tailored to specific requirements including oil control, ring wear, and scuff resistance relevant to the zone.
Inventors:
Redon, Fabien, Gee.
Application Number:
JP2019552197A
Publication Date:
April 25, 2023
Filing Date:
March 16, 2018
Export Citation:
Assignee:
Achates Power, Ink.
International Classes:
F02B75/28; F02B77/02; F02F1/00; F02F1/08; F02F3/00
Domestic Patent References:
| JP2006161589A | ||||
| JP3623330B2 |
Foreign References:
| US20130199503 | ||||
| US7104240 | ||||
| US20120186561 |
Attorney, Agent or Firm:
Patent Attorney Corporation Hiroe Associates Patent Office
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