Internal-combustion engines – Two-cycle – Combined pump and motor cylinder
Patent
1995-05-17
1996-04-23
Okonsky, David A.
Internal-combustion engines
Two-cycle
Combined pump and motor cylinder
123 71R, F02B 3310
Patent
active
055093825
ABSTRACT:
An internal-combustion engine having a main cylinder, a crosshead motor piston mounted on a piston rod, and a charger piston, which reciprocates below the motor piston and has a hole for the piston rod to slide through, is shown in full section in FIG. 1. The piston rod is connected through a motor connecting rod to a short-throw motor crankpin that separates a pair of long-throw charger crankpins that follow it by eight degrees and are connected through a pair of charger connecting rods to the charger piston. The pistons separate as they descend thereby opening a charger cavity wherein a fuel-air charge is drawn via intake ports through the main-cylinder wall. As the pistons rise, the intake ports are blocked; the charge is compressed and forced upward past the motor piston into a hot combustion chamber through transfer channels along the main-cylinder wall that remain blocked by the motor piston until it approaches its zenith. The charge is ignited and burns cursively while entering the hot combustion chamber. Charging is completed when the top of the charger piston contacts the bottom of the motor piston while the transfer channels are being closed by the motor piston as it descends. A piston valve, operated by a link rod attached to the motor connecting rod, opens and closes exhaust ports and primary intake ports. Insulated refractory materials are used for the head plate, motor-piston crown, and valve crown to conserve heat for ultra thermal efficiency.
REFERENCES:
patent: 1413541 (1922-04-01), Reed
patent: 2063817 (1936-12-01), Mallory
patent: 2545999 (1951-03-01), Hirschberg
patent: 3203263 (1965-08-01), Gaffney
patent: 3722482 (1973-03-01), Moore
patent: 5050570 (1991-09-01), Thring
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