Internal-combustion engines – Particular piston and enclosing cylinder construction – Cylinder detail
Patent
1990-08-23
1991-05-28
Dolinar, Andrew M.
Internal-combustion engines
Particular piston and enclosing cylinder construction
Cylinder detail
92212, 92213, F02F 300
Patent
active
050184890
ABSTRACT:
In a heat-insulating piston comprising a ceramic cylindrical member having the lower end surface thereof in contact with the outer peripheral upper end surface of a piston skirt member, a head base member having the peripheral portion thereof in contact with an inner peripheral step portion of the cylindrical member and fixed to the piston skirt member, a heat-insulating member disposed on the head base member and a ceramic thin film member disposed on the heat-insulating member and having the peripheral portion thereof bonded to the cylindrical member, this invention relates to a heat-insulating piston which inserts metallic heat-resistant members between the inner peripheral step portion of the cylindrical member and the peripheral portion of the head base member in order to prevent the occurrence of a gap between the thin film member and the heat-insulating member. To insert the metallic heat-resistant members between the inner peripheral step portion and the peripheral portion described above, the cylindrical member and the thin film member are first bonded and then the metallic heat-resistant members are softened and pushed into a groove defined between the inner peripheral step portion of the cylindrical member and the peripheral portion of the head base member, or pushed between the inner peripheral step portion of the cylindrical member and the peripheral portion of the head base portion.
REFERENCES:
patent: 4552057 (1985-11-01), Mizuhara
patent: 4592268 (1986-06-01), Hartsock
patent: 4648308 (1987-03-01), Matsui et al.
patent: 4735128 (1988-05-01), Mahrus et al.
patent: 4838149 (1989-06-01), Donnison et al.
patent: 4848291 (1989-07-01), Kawamura et al.
Patent Abstracts of Japan, (unexamined applications) M field, vol. 13, No. 133, 04/4/1989, The Patent Office Japanese Government, p. 132 M 809, Koaki-No. 63-302 125, Isuzu Motors, Ltd.
Dolinar Andrew M.
Isuzu Motors Limited
Macy M.
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