Patent ID: 9327720
Filing Date: 2016-05-03
CPC Classification: B60W,F16H,Y02T,Y10T

Claim Text:
1. A control device for controlling a hybrid vehicle drive system, said hybrid vehicle drive system including: (1) a motor generator including a rotor and a stator, the motor generator configured to drive a vehicle and configured to produce electric power when a rotation speed of the rotor of the motor generator is reduced to apply a regenerative braking force to the vehicle, (2) a selectively engageable front clutch configured to rotatably connect the rotor and an engine output shaft of an engine, and (3) a multi-stage automatic transmission having (1) an input shaft rotatably connected to the rotor, (2) a transmission output shaft rotatably connected to driving wheels, and (3) a plurality of frictional engagement elements selectively engaged and disengaged for switching a plurality of gear shift stages having gear ratios different from one another, each of said gear ratios being obtained by dividing a rotation speed of the input shaft by a rotation speed of the transmission output shaft, the control device configured to control switching operations of an engaged state and a disengaged state of the front clutch and configured to control gear shifting operation of the multi-stage automatic transmission, said control device configured to: perform a rotation speed control of the engine in a manner in which a rotation speed of the engine output shaft is set to be equal to a next gear shift stage input shaft rotation speed, said next gear shift stage input shaft rotation speed being obtained by multiplying the rotation speed of the transmission output shaft by the gear ratio of the next gear shift stage, when an operation amount of an accelerator pedal increases from an operation amount smaller than a first predetermined amount, at which the engaged state and the disengaged state of the front clutch is switched, to an operation amount greater than a second predetermined amount, at which the gear stages are switched from the current gear shift stage currently established by the multi-stage automatic transmission to the next gear shift stage whose gear ratio is greater than the current gear shift stage, within a priority determining time; output an engaging command for switching the front clutch from the disengaged state to the engaged state on the basis of a relationship between the rotation speed of the engine output shaft increased by the rotation speed control of the engine and the rotation speed of the rotor of the motor generator; switch the front clutch from the disengaged state to the engaged state in accordance with the engaging command; disengage a release side frictional engagement element, which is configured to be engaged when the current gear shift stage is established and configured to be disengaged when the next gear shift stage is established among the plurality of frictional engagement elements, when the operation amount of the accelerator pedal exceeds the second predetermined amount; perform a rotation speed control of the motor generator to make the rotation speed of the rotor of the motor generator be equal to the next gear shift stage input shaft rotation speed when the release side frictional engagement element is disengaged; and establish an engaged state of an engagement side frictional engagement element, which is configured to be in a disengaged state when the current gear shift stage is established and is configured to be in the engaged state when the next gear shift stage is established among the plurality of the frictional engagement elements, on the basis of a relationship between the rotation speed of the rotor of the motor generator increased by the rotation speed control of the motor generator and the next gearshift stage input shaft rotation speed.