| 摘要 |
<p>A coupling arrangement for interconnecting a piston gudgeon pin (6) and a crankshaft journal (4) of a reciprocating piston engine, said crankshaft journal (4) being connected to a crankshaft (3) by at least one crankshaft arm, the arrangement comprising: a connecting rod (20) having a first end pivotally connected to the crankshaft journal, a connection member (21) pivotally connectable at a first pivot point to a second end of the connecting rod, and pivotally connectable to the gudgeon pin at a second pivot point distal from the first pivot point, and rotational synchronisation means (24, 25) for synchronising the rotational movement of the first pivot point about the gudgeon pin and the rotational movement of the crankshaft journal about the crankshaft, wherein at least the initial relative angular positions of the crankshaft arm and the connection member, and the relative dimensions of the crankshaft arm, connection member and connecting rod, are selected so as to cause the stroke length to alternate between a first and a second value.</p> |
