Variable displacement piston engine

Details Variable displacement piston engine Variable displacement piston engine

1976-11-22

1978-07-18

Wyche, Benjamin W.

Machine element or mechanism

Mechanical movements

Rotary to or from reciprocating or oscillating

F16H 2360

Patent

active

041008154

ABSTRACT:
A variable stroke piston engine in which power developed by piston reciprocation is transmitted to a cylindrical nutating member journaled on its exterior to a rotatable support connected to a second shaft concentric with the first shaft, the nutating member having an internal surface in frictional engagement with a pair of oppositely convergent cone-like members keyed for rotation with the first shaft. The nutating member is disposed on an axis inclined with respect to the axis of the first shaft at an angle which may be adjusted to vary simultaneously piston stroke distance and rotational speed of the first shaft without changing the rotational speed of the second shaft for a given frequency of piston reciprocation. The first and second shafts are connected respectively to each of two inputs of an epicyclic gear train having an output planet gear carrier connected to an engine output shaft. The geometry of the engine enables operation by which output shaft speed varies inversely with piston stroke length or engine displacement.

REFERENCES:
patent: 3418941 (1968-12-01), Mowbray

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