| 摘要 |
<p>A method of controlling a downshift in a transmission (10) having a main box (12) and a compounder (14) that has at least one gearset (36) and at least one friction element (38,40) separate from the main box (12) includes initiating an upshift in the compounder (14) including application of at least one friction element (e.g. a clutch) (38,40) in the compounder (14), and releasing a friction element (e.g. a clutch) (22,24,26,28,30) in the main box (12) providing a swap shift. The speed phase in the compounder (14) may trigger the speed phase in the main box (12), and vice versa. Target fluid volumes in one or both of a clutch (22,24,26,28,30) being released in the main box (12) and a clutch (38,40) being applied in the compounder (14) may be controlled and adjusted, if necessary, as a function of specific event timing in prior shifts.</p> |
