| 摘要 |
<p>1535699 Change-speed gear TOYOTA JIDOSHA KOGYO KK 25 Aug 1977 [28 April 1977] 35694/77 Heading F2D An automatic transmission which comprises a torque converter 1, an overdrive 2 and a three forward speed and reverse portion 3 has a breathing system with passages l in a part 21 of an oil pump 20, 21 leading from the transmission interior to an arcuate passage m in the pump. From passage m an upper passage b leads through part of the wall of the overdrive 2 to a passage 62 leading to atmosphere and a lower passage i leads from arcuate passage m through the wall of the overdrive housing and is joined to passage b by a passage j (see Fig. 5, a section along V-V of Fig. 1). The arrangement of parallel upper and lower passages b and i prevents blocking of the breather passages with oil. The epicyclic overdrive 2 has an input planet carrier 10, an output ring gear 15 and a sun gear 11 which can be held by a brake 19 or clutched to the carrier by a clutch 12. A oneway clutch 13 is also provided between the sun gear 10 and a carrier 10. The three speed and reverse gear box 3 comprises a two-train Simpson gearset in which multiplate clutches 24, 25 and brakes 26, 60, 27 along with one-way clutches 28, 61 effect gear changes.</p> |
