Hybrid vehicle

A hybrid vehicle, comprising an engine;

• a first motor;
• a planetary gear including three rotational elements that are respectively connected with the engine, the first motor and a driveshaft which is linked with an axle;
• a second motor configured to input and output power from and to the driveshaft;
• a power storage device configured to transmit electric power to and from the first motor and the second motor;
• and a control device, wherein
• the control device is programmed to:
• set a required driving force that is required for the driveshaft, based on an operation amount of an accelerator and a vehicle speed;
• set a gear ratio, based on the operation amount of the accelerator and the vehicle speed;
• set a target rotation speed of the engine, based on the vehicle speed and the gear ratio;
• set an upper limit power of the engine when the engine is driven at the target rotation speed;
• set a first upper limit driving force of the driveshaft when the upper limit power is output from the engine;
• set a target driving force of the driveshaft, based on a magnitude relationship between the required driving force and the first upper limit driving force;
• and
• control the engine, the first motor and the second motor, such that the engine is driven at the target rotation speed and that the hybrid vehicle is driven with the target driving force, wherein
• when the required driving force is equal to or smaller than the first upper limit driving force,
• the control device is programmed to set the target driving force to the required driving force, and
• when the required driving force is larger than the first upper limit driving force,
• the control device is programmed to set a target compensation power of the power storage device, based on a difference between the required driving force and the first upper limit driving force,
• the control device is programmed to set a second upper limit driving force of the driveshaft when the upper limit power is output from the engine and power storage device power compensation is performed to charge or discharge the power storage device based on a power corresponding to the target compensation power, and
• the control device is programmed to set the target driving force to the smaller between the required driving force and the second upper limit driving force, and wherein
• when a first type gear shift line is used as a gear shift line to change the gear ratio, and a predetermined condition including a condition that a state of charge of the power storage device is equal to or lower than a first ratio is satisfied,
• the control device is programmed to change the gear shift line to a second type gear shift line that recommends a lower speed gear ratio than the first type gear shift line.