| 摘要 |
A vehicle ( 21 ) comprises a drive source E that drives the wheels L via a transmission system T<SUB>2</SUB>. The transmission system T<SUB>2 </SUB>has an epicyclic gearing P with three rotational members s, a, c of which a first rotational member a is connected to the drive source E, a second rotational member c is connected to the wheels L, via a first reduction R<SUB>1</SUB>, and a final reduction R<SUB>2</SUB>, and a third rotational member s is connected to a brake B. The brake B constitutes reaction means for balancing torque. The transmission system T<SUB>2 </SUB>furthermore comprises a transmission A<SUB>1 </SUB>which is parallel to the epicyclic gearing P and a transmission A<SUB>2 </SUB>which is series with the epicyclic gearing P. Moreover, the transmission system has a lock-up clutch K which can connect the first rotational member a to the second rotational member c. This transmission system T<SUB>2 </SUB>enables shifting between the various transmission ratios without torque interruption, using only one brake. The transmission A<SUB>2 </SUB>can directly be connected to the load L via the lock-up clutch K. Besides, transmission A<SUB>2 </SUB>can be connected to the load L by means of the 'braked ' planetary set P.
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