Patent ID: 9260109
Filing Date: 2016-02-16
CPC Classification: B60K,B60W,B60Y,F16H,Y02T,Y10S,Y10T

Claim Text:
1. A control device for a hybrid vehicle, the hybrid vehicle including an internal combustion engine, a dual-clutch transmission, a first electric motor, and a second electric motor, the dual-clutch transmission including a first input shaft, a second input shaft, an output system, a plurality of gear trains, a first transmission mechanism, and a second transmission mechanism, the first input shaft connected to the internal combustion engine via a first clutch, the second input shaft connected to the internal combustion engine via a second clutch, the output system connected to a drive wheel, the plurality of gear trains including a first gear train which is interposed between the first input shaft and the output system and a second gear train which is interposed between the second input shaft and the output system, the first gear train and the second gear train mutually having different speed ratios, the first transmission mechanism configured to be switched between an engaged state where power transmission between the first input shaft and the output system is established by one of the gear trains interposed between the first input shaft and the output system and a neutral state where power transmission between the first input shaft and the output system is interrupted, the second transmission mechanism configured to be switched between an engaged state where power transmission between the second input shaft and the output system is established by one of the gear trains interposed between the second input shaft and the output system and a neutral state where power transmission between the second input shaft and the output system is interrupted, the first electric motor connected to the first input shaft, the second electric motor connected to the second input shaft, the control device comprising: control the one of the first transmission mechanism and the second transmission mechanism to the engaged state such that power transmission between the output system and the other one of the first input shaft and the second input shaft is established by the gear train having a speed ratio larger than the speed ratio of the gear train that is being used for power transmission between the internal combustion engine and the output system, the computer configured to determine when a speed of the hybrid vehicle falls within a predetermined downshift range in which a downshift for changing from a current speed position to a speed position lower than the current speed position is required when a brake pedal is depressed, and the computer configured to, when the speed of the hybrid vehicle falls within the predetermined downshift range and depression of the accelerator pedal is released while the hybrid vehicle is travelling with the use of the internal combustion engine, control the one of the first transmission mechanism and the second transmission mechanism to the engaged state such that power transmission between the output system and the other one of the first input shaft and the second input shaft is established by the gear train having a speed ratio larger than the speed ratio of the gear train that is being used for power transmission between the internal combustion engine and the output system.