摘要 |
An open-loop clutch-to-clutch shift control system wherein the overlap between off-going and on-coming clutches in an upshift is regulated in accordance with a confidence term determined through a self-estimation by the control system of its ability to accurately determine the on-coming clutch fill time, and thus, its ability to effect a precise exchange of the off-going and on-coming clutches with little or no overlap. Under certain conditions, the confidence level is assumed to be low, and the clutches are controlled to result in a relatively high level of overlap. As the level of confidence improves, the timing of the clutch exchange is adjusted to reduce the level of overlap. When the level of confidence is high, the exchange of clutches is effected with almost no overlap. |
申请人 |
SATURN CORP., TROY, MICH., US |
发明人 |
NITZ, LARRY THEODORE, TROY, MICHIGAN 48098, US;MILUNAS, RIMAS STASYS, ROYAL OAK, MICHIGAN 48073, US |