Planetary gear transmission systems or components – With means to vary drive ratio or disconnect drive
Patent
1996-07-05
1998-12-29
Ta, Khoi Q
Planetary gear transmission systems or components
With means to vary drive ratio or disconnect drive
475282, 475283, F16H 344, F16H 366
Patent
active
058533443
ABSTRACT:
Smooth driving of a vehicle is achieved by eliminating busy shift by providing a small gear ratio step between the two highest gear ranges while maintaining structural compactness of the transmission. In the second highest gear range or state, a first pinion P1 has a diameter smaller than that of a second pinion P2, both pinions P1 and P2 being coupled integrally and at least partially determining the second highest gear ratio. The gear ratio .lambda..sub.2 in the second highest gear range is described as 1+(Z.sub.S2 /Z.sub.R1).times.(Z.sub.P1 /Z.sub.P2). Since (Z.sub.P1 /Z.sub.P2) is always equal to 1.0 or less, the gear ratio can be made smaller without enlarging the diameter of the ring gear R1 significantly to decrease the gear ratio step to the highest gear range.
REFERENCES:
patent: 2584468 (1952-10-01), Kelbel
patent: 2827805 (1958-03-01), Miller
patent: 5006102 (1991-04-01), Takase et al.
patent: 5133697 (1992-07-01), Hattori
patent: 5224908 (1993-07-01), Nishida et al.
Patent Abstracts of Japan, vol. 950, No. 1, 20 Jan 95.
Patent Abstracts of Japan, vol. 11, No. 302, 30 Apr. 87.
Hayabuchi Masahiro
Morimoto Takashi
Nishida Masaaki
Nomura Kengo
Tsukamoto Kazumasa
Aisin Aw Co. Ltd.
Ta Khoi Q
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