SHIFT CONTROL DEVICE
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United States of America Patent
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Issued Date -
May 28, 2020
app pub date -
Oct 14, 2019
filing date -
Nov 26, 2018
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Abstract
A shift control device has stepless and stepped shift modes in which a transmission gear ratio of a continuously variable transmission is controlled in stepless and stepwise fashions, respectively, and includes a shift controller that switches the shift mode to the stepless shift mode by executing shift control of the transmission if an accelerator-pedal operated amount falls below a switch threshold during the stepped shift mode, a minimum value detector that detects an operated-amount minimum value in a shift process of switching the shift mode to the stepless shift mode, and an upper-limit-value setting unit that sets an upper limit value for engine rotational acceleration based on a difference between the operated amount and the minimum value in the shift process. In the shift process, the shift controller limits the rotational acceleration to the upper limit value or lower by limiting a shift rate when the transmission is downshifted.
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