INTERNAL COMBUSTION ENGINE COMPONENT

• Main Authors: SHIOIRI MOTOYUKI, SHIN TOSHIYUKI
• Format: Patent
• Language: English
• Published: 22.08.2000
• Edition: 7
• Subjects: ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES; BLASTING; CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; COMBUSTION ENGINES; COOLING OF INTERNAL-COMBUSTION ENGINES; COOLING OF MACHINES OR ENGINES IN GENERAL; CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ENGINE PLANTS IN GENERAL; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; POWDER METALLURGY; STEAM ENGINES; TRANSPORTING; WEAPONS

PROBLEM TO BE SOLVED: To improve productivity for highly accurate hollow component parts, enabling a core with a small surface roughness of the inside surface of the hollow portion, by forming by die casting a cylinder block and other component members and by providing by enveloping a hollow insert member during forging. SOLUTION: A cylinder block 1 is, for example, an aluminum high pressure die cast product. For making it, a hollow insert member 5 (set core) coaxial with a liner surface 3 on a thick portion that surrounds the cylindrical liner surface 3 facing a combustion chamber 2 so that the insert member is integrally enveloped during forging. The liner surface 3 is made of a hard chilled layer of fine structure formed by contact of molten metal to a cold metal die. The liner surface 3 is formed so that it can therefore withstand sliding motions of a piston for a long time by means of insertion of the cast iron sleeve or hardening of the liner surface. The hollow space of the insert member 5 forms a coolant chamber 12 that is connected to the discharge port of the coolant pump via an inlet 13.