Die-cast liquid cooled cylinder and method of making

Details Die-cast liquid cooled cylinder and method of making Die-cast liquid cooled cylinder and method of making

1989-06-09

1991-06-25

Dolinar, Andrew M.

Internal-combustion engines

Two-cycle

Rear compression

123 65A, F02B 3300

Patent

active

050257609

ABSTRACT:
A unique method of manufacturing a liquid cooled cylinder block by means of a die-casting process is disclosed. The cylinder block (12) has a bore (15) with a plurality of apertures. There is an intake passage (24) through the cylinder block (12) which terminates in an intake port (25) in the bore (15), and an exhaust passage (29) that extends from an exhaust port (31). There are also a plurality of scavenge passages (27) which terminate in scavenge ports (28). The scavenge passages (27) interconnect the bore (15) and the combustion chamber (18). The scavenge passages (27) are formed by means of a pair of side covers (37) which are attached to the cylinder block (12) by means of a plurality of fasteners and a gasket (43). Suitable coolant enters via coolant passageway (44) and circulates through coolant passageways (33, 38, 50, 60).

REFERENCES:
patent: 4306522 (1981-12-01), Fotsch
patent: 4373475 (1983-02-01), Kirk
patent: 4549507 (1985-10-01), Baumhardt
patent: 4598673 (1986-07-01), Poehlman
patent: 4736716 (1988-04-01), Ohyama
patent: 4802447 (1989-02-01), Corbett
patent: 4809648 (1989-03-01), Luo

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