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AssigneeToyota Jidosha Kabushiki Kaisha
InventorsTadashi Tamura, Hideki Yasue, Katsumi Kono, Daisuke Inoue, Yoshiaki Yamamoto, Hiroki Kondo, Hiroji Taniguchi, Kenji Matsuo, Yuji Hattori
Estimating the term…
When the temperature of operating fluid of an actuator is low, a target input rotation speed lower limit value (NinL) is set. The lower limit value (NinL) is greater than a lower limit value set for a normal temperature of operating fluid. A target input rotation speed (Nint) is calculated from the state of running of a vehicle, such as the amount of operation of an accelerator, the vehicle speed, etc. If the target input rotation speed is lower than the lower limit value (NinL), the target input rotation speed is reset to the lower limit value (NinL). As a result of a control that includes the above-described steps, the speed ratio γ becomes relatively high before the vehicle stops. Therefore, even if the speed ratio-changing rate is low, the speed ratio (γ) can be brought to or near a maximum value (γmax) before the vehicle stops. Thus, reductions in the speed ratio-changing rate caused by low temperature of the operating fluid of the actuator can be curbed.
A continuously variable transmission shift control apparatus comprising:
A shift control method of a continuously variable transmission provided with an actuator, that performs a speed shift operation by an operating fluid being supplied to and discharged from the actuator, comprising:
Dependencies are inferred from the claim text.