US 11,892,077 B2
Vehicle gear-shifting control apparatus
Makoto Yamada, Aki-gun (JP); Yasunari Nakayama, Aki-gun (JP); Yusuke Moriyama, Aki-gun (JP); and Wataru Sakamoto, Aki-gun (JP)
Assigned to Mazda Motor Corporation, Hiroshima (JP)
Filed by Mazda Motor Corporation, Hiroshima (JP)
Filed on Mar. 27, 2023, as Appl. No. 18/190,342.
Claims priority of application No. 2022-063120 (JP), filed on Apr. 5, 2022.
Prior Publication US 2023/0313883 A1, Oct. 5, 2023
Int. Cl. F16H 59/74 (2006.01); F16H 61/16 (2006.01); F16H 59/42 (2006.01); F16H 59/14 (2006.01); F16H 61/28 (2006.01)
CPC F16H 61/16 (2013.01) [F16H 59/42 (2013.01); F16H 59/74 (2013.01); F16H 2059/147 (2013.01); F16H 2059/743 (2013.01); F16H 2061/163 (2013.01); F16H 2061/2892 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A vehicle gear-shifting control apparatus, comprising:
an engine which is mounted to a vehicle and which generates a travel drive force of the vehicle;
a hydraulically controlled automatic transmission which has an input shaft connected to the engine and an output shaft connected to a drive wheel of the vehicle and which subjects an input rotation to gear-shifting at a transmission gear ratio corresponding to a selected shift stage and outputs the gear-shifted input rotation; and
a controller which changes the shift stage of the automatic transmission by outputting a gear-shifting signal in accordance with a rotation speed of the input shaft to the automatic transmission, wherein
the controller executes a torque-regulating control in which, during a shift-change of the shift stage, an input torque input to the input shaft is temporarily increased or decreased as compared to during a non-shift-change, and
when executing the torque-regulating control, the controller is configured to:
determine whether or not a target increase/decrease amount of the input torque can be realized under a present state of the engine based on calculation results according to the shift stage of a target value of an output torque which is output from the output shaft and a target value of a gear-shifting time which is required for the shift-change,
execute the torque-regulating control so as to realize the target increase/decrease amount when it is determined that the target increase/decrease amount can be realized, and
execute the torque-regulating control based on an allowable gear-shifting time set in advance to be longer than the target value of the gear-shifting time instead of based on the target value when it is determined that the target increase/decrease amount cannot be realized.