WAERMEISOLIERENDE MOTORSTRUKTUR UND VERFAHREN ZU DEREN HERSTELLUNG.

摘要

The heat-insulating engine structure (10) according to the invention comprises fitting a ceramic head liner (1) for which a cylinder liner top (3) and a head lower surface portion (2) are unified structurally in a cylinder head, coating an outer surface of the cylinder liner top of the head liner with a heat insulating laminate (4) with a metallic sheet and a heat insulating material (19) with potassium titanate as a principal component wound up spirally by turns with a compressive force exerted thereon, thus enhancing strength or pressure resistance, forming a wall of the head liner as thin as possible to minimize a thermal capacity of the head liner, thereby enhancing suction efficiency and cycle efficiency. Further, heat insulation efficiency is enhanced all the more by disposing the heat insulating laminate having air layers between the head liner and the cylinder head. Then, the manufacturing method for the heat insulating engine structure according to the invention comprises heating the metallic sheet for thermal expansion, placing the heat insulating material on the metallic sheet, winding up spirally the metallic sheet on which the heat insulating material is placed to an outer peripheral surface of the cylinder liner top of the ceramic head liner, exerting a compressive force on the cylinder liner top by contraction of the metallic sheet thereafter, thereby ensuring the structure that withstands high pressures despite the thin-walled head liner.