| 摘要 |
An engine mechanism (10) has an output member (16) rotatable on a main axis (A) in a cylinder block (12). A wobble member (30) defines a part spherical surface (34) having a centre of curvature on axis (A), and arms (28) in a plane (X) inclined to axis (A). Each arm (28) has a piston (26) reciprocable on an axis (P) in a respective cylinder (24) parallel to axis (A). A bearing member (36) defines a part spherical surface (38) complementary to, and in sliding contact with, surface (34). A coupling (66) pivotally inter-connects member (30) and member (16) at respective first and second locations spaced laterally from axis (A). The first location at member (30) is able to orbit around axis (A) and is on a line (B) which is perpendicular to plane (X) and passes through the centres of curvature of surfaces (34 and 38). Member (30) is constrained by coupling (66) against rotation on axis (A), while allowing its arms (28) to traverse a lemniscate path dictated by the inclination of plane (X) to axis (A), with orbital movement of the first location about axis (A) and rotation of member (16). |
