Heat-insulating engine structure

专利名称：Heat-insulating engine structure发明人：Hideo Kawamura,Hiroshi Matsuoka申请号：US07/544095申请日：19900626公开号：US05033427A公开日：19910723

摘要：In order to improve the suction efficiency and the cycle efficiency, a heat-insulating engine structure of the invention has a planar and thin- walled piston headsurface portion of a ceramics material to be exposed to combustion gases. A combustionchamber is formed not on the side of the piston head but on the side of a cylinder head.Namely, the piston head is defined by the cooperation of a cylinder head bottom wallportion having a lowered central portion and a raised outer peripheral portion and acylinder liner upper portion including an upper tubular part of a substantially squarecross-section and a lower cylindrical part. The cylinder head bottom wall portion has aninclined surface radially upwardly extending from the central portion to the outerperipheral portion. Intake and exhaust valves are associated with valve seats formed inthe inclined surface. A fuel injection nozzle is disposed substantially centrally of thecylinder head bottom wall portion. The sides of the square tubular part are operative toagitate a swirl to facilitate uniform mixture of fuel and air thereby assuring that the fueland air are mixed instantaneously in a zone adjacent to the top dead center of the piston.

申请人：ISUZU MOTORS LIMITED

代理机构：Browdy and Neimark

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