Countershaft manual transmission for motor vehicles

Details Countershaft manual transmission for motor vehicles Countershaft manual transmission for motor vehicles

1996-12-04

1998-06-09

Ta, Khoi Q.

Machine element or mechanism

Gearing

Interchangeably locked

74325, 74720, 74331, B60K 1708, B60K 2302

Patent

active

057619611

ABSTRACT:
A countershaft transmission is provided for a motor vehicle having a prime mover. The transmission comprises a first input shaft carrying a first input gear, a second input shaft coaxial with the first input shaft carrying a second input gear, and a countershaft carrying a plurality of loose gearwheels, each of the loose gearwheels in meshing engagement with one of the input gears, respectively. A fixed gearwheel is carried by the countershaft in meshing engagement with the gearwheel on the first input shaft. A synchronizing clutch is carried by the countershaft for driving engaging one of the loose gearwheels carried by the countershaft to select a gear ratio. A first clutch is driven by the prime mover. The first clutch is releasably drivably connectable to the first transmission input shaft and the second transmission input shaft. A second clutch is interposed between the first clutch and the second input shaft for drivably connecting the first clutch and the second input shaft. A third clutch is interposed between the first clutch and the input shafts, said third clutch being drivably connectable between the first clutch and the first shaft and the second shaft, alternatively.

REFERENCES:
patent: 3802293 (1974-04-01), Winckler et al.
patent: 4594908 (1986-06-01), Akashi et al.
patent: 4641549 (1987-02-01), Muller
patent: 4823628 (1989-04-01), Hiraiwa
patent: 5259260 (1993-11-01), Schneider

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