Engine cylinder head having induction hardened surfaces resistan

Details Engine cylinder head having induction hardened surfaces resistan Engine cylinder head having induction hardened surfaces resistan

1998-12-28

2000-01-25

McMahon, Marguerite

Internal-combustion engines

Particular piston and enclosing cylinder construction

Cylinder head

F01L 104

Patent

active

060167831

ABSTRACT:
An engine cylinder head can be induction hardened in surface areas contacted by the heads of fastener bolts that are use to fasten the cylinder head to the cylinder block. The hardened surface areas, surrounding the bolt holes, are resistant to fatigue cracking that can otherwise result from thermal and mechanical stresses imposed by the fastener bolt head surfaces.

REFERENCES:
patent: 4823747 (1989-04-01), Wagner et al.
patent: 5704315 (1998-01-01), Tsuchida et al.
patent: 5873331 (1999-02-01), Jutz
Author: The ASM Committee on Induction Hardening Title: "Induction Hardening and Tempering".

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