HEAT-INSULATING FILM MEMBER

• Main Authors: MAEHATA KIMIHIKO, TERAKADO TAKAYOSHI, BESSHO YUJI
• Format: Patent
• Language: English; Japanese
• Published: 09.09.2021
• Subjects: ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES; BLASTING; COMBUSTION ENGINES; CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; WEAPONS

To provide a heat-insulating film member capable of suppressing damage to a heat-insulating film and suppressing an increase in cost for maintaining the heat-insulating performance of a heat-insulating layer.SOLUTION: At least one heat-insulating film member 7 is installed to an inner wall surface 61 of a cylinder liner 6 that accommodates a piston 5 slidably along an axial direction, in which the inner wall surface faces a combustion chamber 10 of an engine 1A. The heat-insulating film member comprises a base layer 8 that is configured to be detachably fitted into a recess 62 formed in the inner wall surface 61 of the cylinder liner 6, and a heat-insulating film layer 9 that is deposited on a surface of the base layer 8, which is on the opposite side from the inner wall surface 61 of the cylinder liner 6. The heat-insulating film layer 9 is provided above a piston ring 12 that lies uppermost in the axial direction of the cylinder liner 6 at a point of time when the piston 5 reaches a top dead center.SELECTED DRAWING: Figure 2 【課題】遮熱膜の損傷を抑制し、遮熱層の遮熱性能の維持にかかるコストの増大化を抑制できる遮熱膜部材を提供する。【解決手段】ピストン５を軸方向に沿って摺動可能に収容するシリンダライナ６におけるエンジン１Ａの燃焼室１０に面する内壁面６１に装着される少なくとも一つの遮熱膜部材７であって、シリンダライナ６の内壁面６１に形成された凹部６２に対して脱着可能に嵌合するように構成された基盤層８と、基盤層８におけるシリンダライナ６の内壁面６１とは反対側の面に成膜される遮熱膜層９と、を備え、遮熱膜層９は、ピストン５が上死点に到達した時点におけるシリンダライナ６の軸方向の最も上側に位置するピストンリング１２よりも上方に設けられる。【選択図】図２