Internal-combustion engines – Free piston – Single chamber; one piston
Patent
1982-09-09
1984-11-06
Feinberg, Craig R.
Internal-combustion engines
Free piston
Single chamber; one piston
123 46E, 123 51R, 123 56C, 123 23, 123668, F02B 7100, H02K 5700
Patent
active
044805993
ABSTRACT:
A free-piston engine formed by one or more units, each comprising a pair of opposed pistons connected to a common piston rod and movable within two opposed cylinders, with a load, such as the inductor of a linear alternator, connected to an intermediate point of the piston rod, and in which there is provided at least a cam controlled by an operatively independent motor and engaging at least a tappet connected to the piston rod of a unit of pistons. This cam is profiled and controlled in such a way as to substantially follow the movement of the tappets which is produced by the free-piston engine during normal operation, but to limit the travel of the piston units and provide the energy for the compression stroke, in case of anomalous operation. The cam serves also to start the engine, as well as to mutually synchronize the various units of pairs of pistons in engines having a plurality of units. The engine may also be in the form of an adiabatic engine fed by coal dust or other solid fuel.
REFERENCES:
patent: 1785643 (1930-12-01), Noack et al.
patent: 1844478 (1932-02-01), Omo
patent: 3675031 (1972-07-01), Lavigne
patent: 4240379 (1980-12-01), Armbruster
patent: 4419971 (1983-12-01), Nakamura et al.
Feinberg Craig R.
Okonsky David A.
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