这维基的东西有时候让人摸不着头脑。。。

http://en.wikipedia.org/wiki/H_engine -
"An H engine can be viewed as two flat engines, one atop or beside the other. The "two engines" each have their own crankshaft, which are then geared together at one end for power-take-off. "

http://en.wikipedia.org/wiki/Boxer_engine -
"A flat engine is an internal combustion engine with multiple pistons that all move in the horizontal plane. The most popular and significant layout has cylinders arranged in two banks on either side of a single crankshaft, generally known as "boxers". "

所以我的理解是，flat engine 是 H engine 的特例，boxer engine 又是 flat engine 的特例。

所有跟帖： 

• 这么说来，它说H4也没有错。更精确地说应该是B4（大概没有这个说法吧） -陡然- ♂ (0 bytes) () 08/01/2010 postreply 14:31:25

• No, H engine是2个flat engines。boxer engine是flat engine的主要形式 -330xi- ♀ (462 bytes) () 08/02/2010 postreply 23:08:18