Method of joining cylinder bore liners to an engine block

Details Method of joining cylinder bore liners to an engine block Method of joining cylinder bore liners to an engine block

1989-12-27

1991-01-22

Dolinar, Andrew M.

Internal-combustion engines

Particular piston and enclosing cylinder construction

Cylinder detail

123668, 123669, 29888061, F02F 100

Patent

active

049862308

ABSTRACT:
Method of bonding cylinder liners to cylinder bore walls, comprising: (a) inserting a cylindrical work hardenable liner into a complementary sized cylindrical bore wall of the block, with a uniform annular radial spacing therebetween of about 0.005 inch; and (b) forcing a nondeformable mandrel throughout the interior length of the cylindrical liner to uniformly circumferentially expand the radially outer surface of the liner into full annular surface-to-surface heat exchange relationship with the interior surface of the bore wall, the mandrel having a cross-sectional radius greater than the interior radius of the liner by a dimension which is at least 0.001 inch in excess of such radial spacing. Preferably, the cylindrical liner is comprised of steel having a ductility of at least 30%, a hardness of at least 35 HRB, and a wall thickness in the range of 0.050-0.250. The mandrel is preferably formed as a spherical element by a process of pressing and sintering followed by precise grinding to shape, and has a hardness greater than either the liner or bore wall.

REFERENCES:
patent: 1402508 (1922-01-01), Lathrop
patent: 1722389 (1929-07-01), Opie et al.
patent: 2353774 (1944-07-01), Wagner
patent: 2435837 (1948-02-01), Larson
patent: 2613431 (1952-10-01), McGee
patent: 3372452 (1968-03-01), Firth et al.
patent: 4221196 (1980-09-01), Castarede
patent: 4370788 (1983-02-01), Baker
patent: 4700444 (1987-10-01), Yamagata

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