Coin insert for the firing deck in an internal combustion engine

Details Coin insert for the firing deck in an internal combustion engine Coin insert for the firing deck in an internal combustion engine

1992-10-16

1994-03-22

Kamen, Noah P.

Internal-combustion engines

Particular piston and enclosing cylinder construction

Cylinder head

123 4182A, F02F 118

Patent

active

052954625

ABSTRACT:
An internal combustion engine cylinder assembly includes a coin insert disposed at the top end of the cylinder acting as a firing deck. The coin insert is formed of a super alloy material and is situated within a recess defined in the cylinder head. A radial clearance is provided between the cylinder head and the coin insert to allow for thermal expansion during engine combustion. In one embodiment, the coin insert is welded to the cylinder head at a location immediately adjacent the fuel injector to directly transfer injector and combustion loads through the insert into the cylinder head. In a second embodiment, a coin insert is welded to an injector sleeve which is disposed within the injector bore of the cylinder head between the cylinder head and the fuel injector. The injector sleeve includes an upper ledge disposed from the injector opening through which loads are transmitted from the coin insert into the upper part of the cylinder head. In a third embodiment, a much thicker coin insert is mechanically constrained between the cylinder head and the cylinder liner. In a further aspect of each of the embodiments of the coin insert, notches are defined in the face of the coin insert disposed against the cylinder head for receiving a C-seal. The C-seal is a compliant gas seal which expands to tighten the seal between the cylinder head and the coin insert, as combustion gases enter the opening of the seal.

REFERENCES:
patent: 1479129 (1924-01-01), Feilner
patent: 3115127 (1963-12-01), Spencer et al.
patent: 4034723 (1977-07-01), Hamparian
patent: 4112906 (1978-09-01), Spencer
patent: 4328772 (1982-05-01), Heydrich et al.
patent: 4344390 (1982-08-01), Heydrich et al.
patent: 4524732 (1985-06-01), Dworak et al.

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