Machine element or mechanism – Gearing – In series plural interchangeably locked nonplanetary units
Patent
1987-11-16
1989-04-04
Wright, Dirk
Machine element or mechanism
Gearing
In series plural interchangeably locked nonplanetary units
74762, F16H 3700, F16H 5710
Patent
active
048174629
ABSTRACT:
A planet wheel speed change transmission for motor vehicles arrayed in groups with one basic drive and one group drive associated therewith in series, where the basic drive consists of a speed change transmission with fixedly coupled partial drive and a sequence of gear ratios decreasing in principle from first to highest gear, and the group drive is shifted only once during the entire shift sequence and the number of gears in the basic drive is increased by a single gear, with shift clutches, brakes and free-wheel mechanisms for the automatic shifting of at least four forward speeds, where the shifting of the group drive occurs between two of the gears of the basic drive, or where the group drive is speed-reducing and then shifting occurs also ahead of the first gear of the basic drive and the transmission ratio of the group drive, when it is shifted, is created in dependence upon the gear ratios in the adjacent gears of the basic drive.
REFERENCES:
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patent: 3209618 (1965-10-01), Schwab
patent: 4007648 (1977-02-01), Bookout
patent: 4043223 (1977-08-01), Ohnuma et al.
patent: 4241622 (1980-12-01), Kubo et al.
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patent: 4512212 (1985-04-01), Ishikawa
patent: 4582159 (1986-04-01), Suzuki
patent: 4602522 (1986-07-01), Dorpmund
ATZ Automobiltechnische Zeitschrift 85 (1983) 6 The Development of ZF's HP 22 Four-Speed Automatic Transmission-Hansjorg Dach.
SAE Technical Paper Series 820740, Toyota Computer Controlled Four-Speed Automatic Transmission, SAE-The Engineering Resource for Advancing Mobility Passenger Car Meeting, Troy, Michigan, Jun. 7-10, 1982.
Dach Hans-Jurgen
Ott Anton
Dubno Herbert
Wright Dirk
Zahnradfabrik Friedrichshafen AG
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