Hybrid vehicle and control method of hybrid vehicle

A control method of a hybrid vehicle, the hybrid vehicle including:

• an internal combustion engine that outputs power to a driveshaft linked with an axle of the vehicle;
• a motoring assembly that is connected to an output shaft of the internal combustion engine via a gear mechanism and motors the internal combustion engine with input and output of torques from and to the driveshaft;
• and a motor that inputs and outputs power from and to the driveshaft,
• (a) when a start command of the internal combustion engine is given in absence of a driver's power demand in a rotating state of the driveshaft, the control method controlling the internal combustion engine, the motoring assembly, and the motor to bring the internal combustion engine into a state of complete explosion and combustion with setting a starting torque of the internal combustion engine to a preset level of sufficiently small torque in motoring the internal combustion engine by the motoring assembly and to terminate the motoring of the internal combustion engine by the motoring assembly after the complete explosion and combustion in the internal combustion engine, and
• (b) when the start command of the internal combustion engine is given in the absence of the driver's power demand in a rotation stop state of the driveshaft, the control method controlling the internal combustion engine, the motoring assembly, and the motor to bring the internal combustion engine into the state of complete explosion and combustion with setting the starting torque of the internal combustion engine to a chattering control torque, which is greater than the sufficiently small torque, in motoring the internal combustion engine by the motoring assembly and to terminate the motoring of the internal combustion engine by the motoring assembly after the complete explosion and combustion in the internal combustion engine.

A hybrid vehicle, comprising:

• an internal combustion engine that outputs power to a driveshaft linked with an axle of the vehicle;
• a motoring assembly that is connected to an output shaft of the internal combustion engine via a gear mechanism and motors the internal combustion engine with input and output of torques from and to the driveshaft;
• a motor that inputs and outputs power from and to the driveshaft;
• a driveshaft rotation status detector that detects a rotation status of the driveshaft;
• a power demand detector that detects presence or absence of a driver's power demand;
• and
• a start controller that, when a start command of the internal combustion engine is given in the absence of the driver's power demand in a rotation stop state of the driveshaft, controls the internal combustion engine, the motoring assembly, and the motor to bring the internal combustion engine into a state of complete explosion and combustion with setting a starting torque of the internal combustion engine to a preset level of chattering control torque in motoring the internal combustion engine by the motoring assembly and to terminate the motoring of the internal combustion engine by the motoring assembly after the complete explosion and combustion in the internal combustion engine.

A hybrid vehicle, comprising:

• an internal combustion engine that outputs power to a driveshaft linked with an axle of the vehicle;
• a motoring assembly that is connected to an output shaft of the internal combustion engine via a gear mechanism and motors the internal combustion engine with input and output of torques from and to the driveshaft;
• a motor that inputs and outputs power from and to the driveshaft;
• a driveshaft rotation status detector that detects a rotation status of the driveshaft;
• a power demand detector that detects presence or absence of a driver's power demand;
• and
• a start controller, when a start command of the internal combustion engine is given in the absence of the driver's power demand in a rotating state of the driveshaft, controls the internal combustion engine, the motoring assembly, and the motor to bring the internal combustion engine into a state of complete explosion and combustion with setting a starting torque of the internal combustion engine to a preset level of sufficiently small torque in motoring the internal combustion engine by the motoring assembly and to terminate the motoring of the internal combustion engine by the motoring assembly after the complete explosion and combustion in the internal combustion engine,
• when the start command of the internal combustion engine is given in the absence of the driver's power demand in a rotation stop state of the driveshaft, the start controller controlling the internal combustion engine, the motoring assembly, and the motor to bring the internal combustion engine into the state of complete explosion and combustion with setting the starting torque of the internal combustion engine to a chattering control torque, which is greater than the sufficiently small torque, in motoring the internal combustion engine by the motoring assembly and to terminate the motoring of the internal combustion engine by the motoring assembly after the complete explosion and combustion in the internal combustion engine.