| 摘要 |
The gearbox comprises a primary (112) and secondary shafts (114,116). The primary shaft carries pinions (118,120) that rotate with the engine. These mesh with secondary pinions (122,124,128,130,132) that are carried by the secondary shafts that rotate with a differential crown gear to establish different gear ratios. The secondary pinions idle integrally with on another on the shafts. The secondary pinions can be selectively connected by pawls (154,156,158) whilst two independent clutches (150,152) engage and disengage the primary shaft to establish gear ratios. The two clutches can be engaged and disengaged alternately so as to change gear ratios without any discontinuity to the wheels.
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