Internal combustion engines

Details Internal combustion engines Internal combustion engines

1987-07-27

1989-05-30

Miller, Carl Stuart

Internal-combustion engines

Two-cycle

Rear compression

123 73A, 123 65R, F02B 3304

Patent

active

048340340

ABSTRACT:
The present invention relates to an internal combustion engine cylinder assembly comprising a cylinder having substantially vertically disposed interior walls defining a firing chamber therein; piston means housed within the firing chamber and adapted for vertical reciprocation within the firing chamber; gas inlet channels in the lower portion of the firing chamber; a crankcase housing having a gas compression chamber disposed therein; valve means adapted for passing air into the gas compression chamber upon the depressuring thereof; cylinder closure means positioned at the upper end of the cylinder defining the upper end of the firing chamber and being provided with exhaust gas valve means, adapted for cyclic opening and closing to alternatively permit the removal of exhaust gases from the firing chamber and the pressuring of fresh fuel/air mixtures in the firing chamber; fuel introduction means for introducing fuel into the upper portion of the firing chamber; fuel ignition means for igniting a compressed fuel/air mixture in the firing chamber; at least a portion of the cylinder inner walls extending downwardly into the gas compression chamber and adapted to house at least a portion of the piston means therein during the full downstroke of the piston means; the upper portion of the crankcase housing having inwardly converging walls to define a converging gas space in the upper portion of the gas compression chamber annularly about the downwardly extending cylinder portion.

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patent: 4395978 (1983-08-01), Boyesen
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