| 摘要 |
<p>The method is for controlling torque during a ratio change in a vehicular drive train, the drive train including an engine having an output member drivingly coupled to an input member of a multi-ratio transmission for providing an input torque to it, the ratio change including transfer of a shift torque to an on-coming friction element of the transmission, and the shift torque comprising the input torque and an inertia torque. The method involves the steps of calculating an uncorrected shift torque, calculating the transmission input torque, determining a shift torque reduction required to establish a predetermined target shift torque when applied to the uncorrected shift torque, and calculating a percent engine torque reduction as the ratio of the shift torque reduction to the transmission input torque. The engine torque is reduced by the percent engine torque reduction to thereby establish a corrected shift torque equivalent to the target shift torque.</p> |
