| 摘要 |
<p>PCT No. PCT/GB86/00620 Sec. 371 Date Jun. 9, 1987 Sec. 102(e) Date Jun. 9, 1987 PCT Filed Oct. 13, 1986 PCT Pub. No. WO87/02416 PCT Pub. Date Apr. 23, 1987.An internal combustion engine has a pair of stepped cylinders (14,15) in which stepped pistons (P1,P2) are received, each cylinder (14,15) and piston (P1,P2) having a pumping part of larger diameter and a working part of smaller diameter transfer paths from each of the pumping parts of each cylinder to the working part of the other comprising first passage parts (27,27') extending from the pumping parts (15a,14a) to second passage parts (28,28') and third passage parts comprising at least two branches (29,29') connecting the second passage parts (28,28') and the working parts (16a,16b) of the cylinder, the first (27,27') and third (29,29') passage parts each crossing an interface (1) between the crankcase 12 and cylinder block (11) via aligned parts, and the second passage parts (28,28') being wholly contained in the crankcase (12).</p> |
