| 摘要 |
992,837. Rotary piston internal combustion engines. DAIMLER-BENZ A.G. Dec. 18, 1963 [Dec. 21, 1962], No. 50058/63. Heading F1F. In a rotary piston I.C. engine of trochoidal type in which a three or more-sided piston 3, Fig. 1, rotating on an eccentric 1 slides by radial seals (not shown) disposed at its corners over the peripheral surface 4 of the housing 5 and by axial seals at its ends 6 over the side-walls 7 of the housing, each axial seal, besides the gas seal (not shown), includes two concentric oil-sealing rings 8, 9 fixed in the piston with an annular space 10 therebetween divided by radial ribs 11, Fig. 2, into a number of separate chambers 12. The relatively small diameter of the inner ring 8, permits of a low level 16 of the oil thrown outwardly by centrifugal force, with the oil passing out through an opening 13 in the housing side-wall. Any oil that passes the lip of the ring 8 is received in the chambers 12 and the level of this oil never extends beyond the lip 14 of the outer ring 9. This oil is carried round in the chambers until on reaching the side remote from the eccentric the oil passes in the direction of the arrows 18 through the opening 13. Alternatively this oil may pass through passages 20 into compartments 19 of the piston containing the cooling oil. |
