Variable stroke piston type engine

Details Variable stroke piston type engine Variable stroke piston type engine

1977-04-07

1979-03-20

Wyche, Benjamin W.

Machine element or mechanism

Mechanical movements

Rotary to or from reciprocating or oscillating

123 78E, F16H 2300

Patent

active

041447719

ABSTRACT:
A piston type energy conversion machine in which the thrust of one or more reciprocating pistons is transmitted to a nutating tubular member having longitudinally spaced journal surfaces of revolution about a nutating axis adjustably inclined with respect to a primary engine axis. The journal surfaces on the nutating member are engaged by a crank member rotatable on the primary engine axis and carrying adjustably eccentric bearings to engage the journal surfaces of the nutating member. Angular adjustment of the axis of nutation effects a variable piston stroke distance as a result of a connection of the pistons to the nutating members at points spaced radially from the nutating axis. Compression ratio is adjusted independently by shifting the point of piston connection with the nutating member along the nutating axis. The nutating member is tubular to establish interior traction surfaces engagable with oppositely converging cone-like surfaces carried by an output shaft so that speed ratio of the output shaft may be varied simultaneously with changes in the angle of nutation and piston stroke length.

REFERENCES:
patent: 2577675 (1951-12-01), Burkland
patent: 2947182 (1960-08-01), Wahlmark
patent: 2957462 (1960-10-01), Clark
patent: 3911791 (1975-10-01), Clark

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