| 摘要 |
<p>A system (10) and method for decreasing the time required to complete a ratio change in an electronically enhanced powertrain system include independently controlling at least one engine-side retarding device (32) and at least one transmission-side retarding device (38). The retarding devices (32, 38) are selectively actuated to increase the decay rate of the engine speed and/or transmission input shaft speed during an upshift. Engine-side retarding devices may include an engine brake (32) or operation of various engine accessories (30, 34)to increase engine loading. Transmission-side retarding devices may include input shaft brake (38) or driveline retarder. <IMAGE></p> |
