Patent ID: 9020678
Filing Date: 2015-04-28
Classification: B60K,B60W,F02D,Y02T,Y10S

Abstract:
1. A drive control device for a hybrid vehicle provided with: a differential device which includes a first differential mechanism and a second differential mechanism and which has four rotary elements; and an engine, a first electric motor, a second electric motor and an output rotary member which are respectively connected to said four rotary elements, and wherein one of said four rotary elements is constituted by a rotary component of said first differential mechanism and a rotary component of said second differential mechanism which are selectively connected to each other through a clutch, and one of the rotary components of said first and second differential mechanisms which are selectively connected to each other through said clutch is selectively fixed to a stationary member through a brake, said drive control device comprising a mode selecting operation device selecting an acceleration drive mode oriented to vehicle acceleration and a fuel efficiency drive mode oriented to fuel efficiency, when the acceleration drive mode is selected at the start of the vehicle, the vehicle starting in motor running or engine running in which a drive force is generated by operating the first electric motor and the second electric motor, when the fuel efficiency drive mode associated with a requirement for fuel efficiency is selected, the vehicle starting in motor running or engine running in which a drive force is generated by operating the first electric motor or the second electric motor, the drive control device having a first motor drive mode in which the second electric motor is used for running with the brake placed in an engaged state; a first engine drive mode in which the first electric motor is caused to generate a reaction torque while the second electric motor is caused to generate a drive force with the brake placed in an engaged state; a second motor drive mode in which the first electric motor and the second electric motor are used for running with the brake and the clutch placed in an engaged state; and a second engine drive mode in which the first electric motor and the second electric motor are caused to generate a reaction torque with the clutch placed in an engaged state, when the fuel efficiency drive mode is selected and the motor running is requested, the first motor drive mode being selected, when the fuel efficiency drive mode is selected and the engine running is requested, the first engine drive mode being selected, when the acceleration drive mode is selected and the motor running is requested, the second motor drive mode being selected, and when the acceleration drive mode is selected and the engine running is requested, the second engine drive mode being selected.