초록 ▼

The present invention provides a hybrid vehicle driving system in which quick response and improvement in fuel economy are compatible. A hybrid vehicle driving system 1 of the invention includes a cylinder deactivated operation necessity determination unit for determining the necessity of a cylinder

The present invention provides a hybrid vehicle driving system in which quick response and improvement in fuel economy are compatible. A hybrid vehicle driving system 1 of the invention includes a cylinder deactivated operation necessity determination unit for determining the necessity of a cylinder deactivated operation of an engine 6 when a required driving force required on a vehicle is smaller than a driving force of the engine 6 that runs in the cylinder deactivated operation. When the cylinder deactivated operation is determined to be unnecessary by the cylinder deactivated operation necessity determination unit, the vehicle can be driven in an EV driving by disengaging a first clutch 41 and a second clutch 42, whereas when the cylinder deactivated operation is determined to be necessary by the cylinder deactivated operation necessity determination unit, the engine 6 runs in the cylinder deactivated operation and at least one of the first clutch 42 and the second clutch 42 is engaged.

대표청구항 ▼

1. A hybrid vehicle including an internal combustion engine that, can be switched to an all cylinder activated operation where all cylinders are activated for operation and a cylinder deactivated operation where at least part of the cylinders is deactivated for rest, and an electric motor, as drive

1. A hybrid vehicle including an internal combustion engine that, can be switched to an all cylinder activated operation where all cylinders are activated for operation and a cylinder deactivated operation where at least part of the cylinders is deactivated for rest, and an electric motor, as drive sources, the hybrid vehicle comprising: a battery that supplies electric power to the electric motor;a change-speed mechanism that transmits mechanical power from an output shaft of the internal combustion engine and the electric motor in a state that the output shaft is selectively connected with the electric motor by a first engaging and disengaging portion; anda cylinder deactivated operation necessity determination unit for determining on the necessity of the cylinder deactivated operation based on a required driving force required on the vehicle, wherein:when the cylinder deactivated operation is determined to be unnecessary, the vehicle is driven in an EV mode, only by a driving force of the electric motor, by disengaging the first engaging and disengaging portion;when the cylinder deactivated operation is determined to be necessary, the cylinder deactivated operation is performed and the first engaging and disengaging portion is engaged; andthe cylinder deactivated operation necessity determination unit determines if the hybrid vehicle is coasting down and when the cylinder deactivated operation necessity determination unit determines that the hybrid vehicle is coasting down the cylinder deactivated operation necessity determination unit determines that the cylinder deactivated operation is necessary. 2. The hybrid vehicle according to claim 1, further comprising: an electronic control throttle that can control the amount of induction air induced into the internal combustion engine, wherein:when the required driving force is smaller than the driving force corresponding to the cylinder deactivated operation, a control is made so that the cylinder deactivated operation is performed and that an opening of the electronic control throttle is increased as the required driving force is increased;when the required driving force is larger than the driving force corresponding to the cylinder deactivated operation and is smaller than a sum of the driving force corresponding to the cylinder deactivated operation and a driving force that can be outputted by the electric motor, a control is made so that the cylinder deactivated operation is performed and that the electric motor is made to output a difference between the required driving force and the driving force corresponding to the cylinder deactivated operation; andwhen the required driving force is larger than the sum of the driving force corresponding to the cylinder deactivated operation and the driving force that can be outputted by the electric motor, a control is made so that the cylinder deactivated operation is switched to the all cylinder activated operation and that the opening of the electronic control throttle is changed to an opening that corresponds to the all cylinder activated operation. 3. The hybrid vehicle according to claim 1, wherein the cylinder deactivated operation includes a partial cylinder deactivated operation where the engine runs with only part of the cylinders deactivated for rest and an all cylinder deactivated operation where the engine runs with all the cylinders deactivated;when the required driving force is smaller than a driving force of the internal combustion engine that runs in the all cylinder activated operation and a BSFC bottom operation is enabled by the internal combustion engine that runs in the partial cylinder deactivated operation, a control is made so that the internal combustion engine runs in the partial cylinder deactivated operation; andwhen the required driving force is smaller than the driving force of the internal combustion engine that runs in the all cylinder activated operation and a difference therebetween is equal to or larger than a predetermined value, a control is made so that the vehicle is driven in the EV mode or the internal combustion engine runs in the all cylinder deactivated operation in accordance with a state of charge of the battery and the required driving force. 4. A hybrid vehicle including an internal combustion engine that can be switched to an all cylinder activated operation where all cylinders are activated for operation and a cylinder deactivated operation where at least part of the cylinders is deactivated for rest, and an electric motor, as drive sources, the hybrid vehicle comprising: a battery that supplies electric power to the electric motor;a change-speed mechanism that transmits mechanical power from an output shaft of the internal combustion engine and the electric motor in a state that the output shaft is selectivelyconnected with the electric motor by a first engaging and disengaging portion; anda cylinder deactivated operation necessity determination unit for determining on the necessity of the cylinder deactivated operation based on a required driving force required on the vehicle, wherein:when the cylinder deactivated operation is determined to be unnecessary, the vehicle is driven in an EV mode, only by a driving force of the electric motor, by disengaging the first engaging and disengaging portion;when the cylinder deactivated operation is determined to be necessary, the cylinder deactivated operation is performed and the first engaging and disengaging portion is engaged; andthe cylinder deactivated operation necessity determination unit determines if a paddle shift is selected, and when the cylinder deactivated operation necessity determination unit determines that the paddle shift is selected the cylinder deactivated operation necessity determination unit determines that the cylinder deactivated operation is necessary. 5. The hybrid vehicle according to claim 4, further comprising: an electronic control throttle that can control the amount of induction air induced into the internal combustion engine, wherein:when the required driving force is smaller than the driving force corresponding to the cylinder deactivated operation, a control is made so that the cylinder deactivated operation is performed and that an opening of the electronic control throttle is increased as the required driving force is increased;when the required driving force is larger than the driving force corresponding to the cylinder deactivated operation and is smaller than a sum of the driving force corresponding to the cylinder deactivated operation and a driving force that can be outputted by the electric motor, a control is made so that the cylinder deactivated operation is performed and that the electric motor is made to output a difference between the required driving force and the driving force corresponding to the cylinder deactivated operation; andwhen the required driving force is larger than the sum of the driving force corresponding to the cylinder deactivated operation and the driving force that can be outputted by the electric motor, a control is made so that the cylinder deactivated operation is switched to the all cylinder activated operation and that the opening of the electronic control throttle is changed to an opening that corresponds to the all cylinder activated operation. 6. The hybrid vehicle according to claim 4, wherein the cylinder deactivated operation includes a partial cylinder deactivated operation where the engine runs with only part of the cylinders deactivated for rest and an all cylinder deactivated operation where the engine runs with all the cylinders deactivated;when the required driving force is smaller than a driving force of the internal combustion engine that runs in the all cylinder activated operation and a BSFC bottom operation is enabled by the internal combustion engine that runs in the partial cylinder deactivated operation, a control is made so that the internal combustion engine runs in the partial cylinder deactivated operation; andwhen the required driving force is smaller than the driving force of the internal combustion engine that runs in the all cylinder activated operation and a difference therebetween is equal to or larger than a predetermined value, a control is made so that the vehicle is driven in the EV mode or the internal combustion engine runs in the all cylinder deactivated operation in accordance with a state of charge of the battery and the required driving force. 7. A hybrid vehicle including an internal combustion engine that can be switched to an all cylinder activated operation where all cylinders are activated for operation and a cylinder deactivated operation where at least part of the cylinders is deactivated for rest, and an electric motor, as drive sources, the hybrid vehicle comprising; a battery that supplies electric power to the electric motor;a change-speed mechanism that transmits mechanical power from an output shaft of the internal combustion engine and the electric motor in a state that the output shaft is selectively connected with the electric motor by a first engaging and disengaging portion; anda cylinder deactivated operation necessity determination unit for determining on the necessity of the cylinder deactivated operation based on a required driving force required on the vehicle, wherein:when the cylinder deactivated operation is determined to be unnecessary, the vehicle is driven in an EV mode, only by a driving force of the electric motor, by disengaging the first engaging and disengaging portion;when the cylinder deactivated operation is determined to be necessary, the cylinder deactivated operation is performed and the first engaging and disengaging portion is engaged;the hybrid vehicle driving system is characterized by further comprising a driving state predicting unit that liaise with a car navigation system; andthe cylinder deactivated operation necessity determination unit determines if a switching from the EV mode to a different driving mode is predicted by the driving state predicting unit, and when the cylinder deactivated operation necessity determination unit determines that the switching from the EV mode to the different driving mode is predicted by the driving state predicting unit, the cylinder deactivated operation necessity determination unit determines that the cylinder deactivated operation is necessary. 8. The hybrid vehicle according to claim 7, further comprising: an electronic control throttle that can control the amount of induction air induced into the internal combustion engine, wherein:when the required driving force is smaller than the driving force corresponding to the cylinder deactivated operation, a control is made so that the cylinder deactivated operation is performed and that an opening of the electronic control throttle is increased as the required driving force is increased;when the required driving force is larger than the driving force corresponding to the cylinder deactivated operation and is smaller than a sum of the driving force corresponding to the cylinder deactivated operation and a driving force that can be outputted by the electric motor, a control is made so that the cylinder deactivated operation is performed and that the electric motor is made to output a difference between the required driving force and the driving force corresponding to the cylinder deactivated operation; andwhen the required driving force is larger than the sum of the driving force corresponding to the cylinder deactivated operation and the driving force that can be outputted by the electric motor, a control is made so that the cylinder deactivated operation is switched to the all cylinder activated operation and that the opening of the electronic control throttle is changed to an opening that corresponds to the all cylinder activated operation. 9. The hybrid vehicle according to claim 7, wherein the cylinder deactivated operation includes a partial cylinder deactivated operation where the engine runs with only part of the cylinders deactivated for rest and in all cylinder deactivated operation where the engine runs with all the cylinders deactivated;when the required driving force is smaller than a driving force of the internal combustion engine that runs in the all cylinder activated operation and a BSFC bottom operation is enabled by the internal combustion engine that runs in the partial cylinder deactivated operation, a control is made so that the internal combustion engine runs in the partial cylinder deactivated operation; andwhen the required driving force is smaller than the driving force of the internal combustion engine that runs in the all cylinder activated operation and a difference therebetween is equal to or larger than a predetermined value, a control is made so that the vehicle is driven in the EV mode or the internal combustion engine runs in the all cylinder deactivated operation in accordance with a state of charge of the battery and the required driving force. 10. A hybrid vehicle including an internal combustion engine that can be switched to an all cylinder activated operation where all cylinders are activated for operation and a cylinder deactivated operation where at least part of the cylinders is deactivated for rest, and an electric motor, as drive sources, the hybrid vehicle comprising: a battery that supplies electric power to the electric motor;a change-speed mechanism that transmits mechanical power from an output shaft of the internal combustion engine and the electric motor in a state that the output shaft is selectively connected with the electric motor by a first engaging and disengaging portion; anda cylinder deactivated operation necessity determination unit for determining on the necessity of the cylinder deactivated operation based on a required driving is force required on the vehicle, wherein:when the cylinder deactivated operation is determined to be unnecessary, the vehicle is driven in an EV mode, only by a driving force of the electric motor, by disengaging the first engaging and disengaging portion;when the cylinder deactivated operation is determined to be necessary, the cylinder deactivated operation is performed and the first engaging and disengaging portion is engaged; andthe cylinder deactivated operation necessity determination unit determines if a sport mode is selected, and when the cylinder deactivated operation necessity determination unit determines that the sport mode is selected, the cylinder deactivated operation necessity determination unit determines that the cylinder deactivated operation is necessary. 11. The hybrid vehicle according to claim 10, further comprising: an electronic control throttle that can control the amount of induction air induced into the internal combustion engine, wherein:when the required driving force is smaller than the driving force corresponding to the cylinder deactivated operation, a control is made so that the cylinder deactivated operation is performed and that an opening of the electronic control throttle is increased as the required driving force is increased;when the required driving force is larger than the driving force corresponding to the cylinder deactivated operation and is smaller than a sum of the driving force corresponding to the cylinder deactivated operation and a driving force that can be outputted by the electric motor, a control is made so that the cylinder deactivated operation is performed and that the electric motor is made to output a difference between the required driving force and the driving force corresponding to the cylinder deactivated operation; andwhen the required driving force is larger than the sum of the driving force corresponding to the cylinder deactivated operation and the driving force that can be outputted by the electric motor, a control is made so that the cylinder deactivated operation is switched to the all cylinder activated operation and that the opening of the electronic control throttle is changed to an opening that corresponds to the all cylinder activated operation. 12. The hybrid vehicle according to claim 10, wherein the cylinder deactivated operation includes a partial cylinder deactivated operation where the engine runs with only part of the cylinders deactivated for rest and an all cylinder deactivated operation where the engine runs with all the cylinders deactivated;when the required driving force is smaller than a driving force of the internal combustion engine that runs in the all cylinder activated operation and a BSFC bottom operation is enabled by the internal combustion engine that runs in the partial cylinder deactivated operation, a control is made so that the internal combustion engine runs in the partial cylinder deactivated operation; andwhen the required driving force is smaller than the driving force of the internal combustion engine that runs in the all cylinder activated operation and a difference therebetween is equal to or larger than a predetermined value, a control is made so that the vehicle is driven in the EV mode or the internal combustion engine runs in the all cylinder deactivated operation in accordance with a state of charge of the battery and the required driving force. 13. A hybrid vehicle including an internal combustion engine that, can be switched to an all cylinder activated operation where all cylinders are activated for operation and a cylinder deactivated operation where at least part of the cylinders is deactivated for rest, and an electric motor, as drive sources, the hybrid vehicle comprising: a battery that supplies electric power to the electric motor;a change-speed mechanism that transmits mechanical power from an output shaft of the internal combustion engine and the electric motor in a state that the output shaft is selectively connected with the electric motor by a first engaging and disengaging portion; anda cylinder deactivated operation necessity determination unit for determining on the necessity of the cylinder deactivated operation based on a required driving force required on the vehicle, wherein:when the cylinder deactivated operation is determined to be unnecessary, the vehicle is driven in an EV mode, only by a driving force of the electric motor, by disengaging the first engaging and disengaging portion;when the cylinder deactivated operation is determined to be necessary, the cylinder deactivated operation is performed and the first engaging and disengaging portion is engaged; andthe cylinder deactivated operation necessity determination unit determines if the vehicle is driven in a state where a constant pedal effort is being applied to an accelerator pedal, and when the cylinder deactivated operation necessity determination unit determines that the vehicle is driven in the state where the constant pedal effort is being applied to the accelerator pedal, the cylinder deactivated operation necessity determination unit determines that the cylinder deactivated operation is necessary.