Movable fulcrum for differential and variable-stroke cycle engines
AssigneeYan Engines, Inc.
InventorsHailuat D. Yan, Ming Jeng Yan
Life of this patent
Estimating the term…
Abstract
An engine includes an engine shaft configured to rotate and cause one or more pistons to reciprocate within a cylinder chamber along an axis, each piston having a first piston part and piston stem to move in unison with or separately from a second piston part to define piston strokes for different thermal functions of the engine. The engine further includes a piston lever having a first end coupled to a movable fulcrum point and a second end coupled at a copy point to the piston stem, an actuation mechanism configured to move the piston lever and thereby the copy point, and a guide apparatus configured to dictate movement of the copy point in a direction substantially parallel to the cylinder axis.
Claims12
An engine having an engine shaft configured to rotate and cause one or more pistons to reciprocate within a cylinder chamber along an axis, each piston having a first piston part and piston stem to move in unison with or separately from a second piston part to define piston strokes for different thermal functions of the engine, the engine comprising:
- a piston lever having a first end coupled to a movable fulcrum point and a second end coupled at a copy point to the piston stem;
- an actuation mechanism configured to move the piston lever and thereby the copy point;
- and
- a guide apparatus configured to dictate movement of the copy point in a direction substantially parallel to the cylinder axis,
- wherein the movable fulcrum comprises a roller or a slider moveable within the guide apparatus such that the movable fulcrum point is configured to move in a direction substantially perpendicular with the cylinder axis.
Dependencies are inferred from the claim text.