| 摘要 |
An automatic powershift vehicle transmission comprising: an input shaft (18): an output shaft (22) parallel to and alongside the input shaft; first and second intermediate shafts (28,31) each being parallel to and alongside the input shaft; a lay shaft (40) parallel to and alongside the output shaft; gearing provided on the input, output, intermediate, and lay shafts, the gearing providing first, second, third and fourth forward driving paths from the input shaft to the output shaft, with a gear ratio between the input shaft and output shaft increasing from the first to the fourth forward driving path; a first clutch (73) between the ends of the input shaft and which is operable to establish a driving connection between the input shaft and output shaft along the first or third forward driving paths, through the first intermediate shaft and gearing carried on the lay shaft; and a second clutch (72) between the ends of the input shaft which is operable to establish a driving connection between one of the input shaft and output shaft along the second forward driving path through the second intermediate shaft and gearing carried on the lay shaft, and the fourth forward driving path, a third clutch (50) for establishing the first or third forward driving path when the first clutch is operative, and a fourth clutch (30) for establishing the second or fourth forward driving path when the second clutch is operative. |
