| 摘要 |
A multi-link engine (10) has a piston (32) coupled to a crankshaft (33) to move inside an engine cylinder (31). A piston pin connects the piston (32) to an upper link (11), which is connected to a lower link (12) by an upper link pin. A crank pin of the crankshaft rotatably supports the lower link thereon. A control link pin (23) connects the lower link to one end of a control link (13), which is connected at another end to the engine block body by a control shaft (24). The upper link (11) has an upper link axis that forms an angle with the cylinder axis, as viewed along a crank axis direction of the crankshaft (33), such that the angle reaches a minimum when a crank angle of the engine is within a range where the bottom end of a piston skirt is positioned below a topmost part of the bottom end of the cylinder liner. |
