초록 ▼

A vehicle having a sun gear, a carrier, and a ring gear of a planetary gear mechanism respectively connected to a first motor, an engine, and a drive shaft and second motor. When the combination of measured accelerator opening and measured vehicle speed is in an ordinary acceleration area, the vehic

A vehicle having a sun gear, a carrier, and a ring gear of a planetary gear mechanism respectively connected to a first motor, an engine, and a drive shaft and second motor. When the combination of measured accelerator opening and measured vehicle speed is in an ordinary acceleration area, the vehicle sets a torque demand to decrease with an increase in measured vehicle speed at a specific reduction rate that ensures substantially constant output power to the drive shaft corresponding to the accelerator opening. When the combination of the measured accelerator opening and the measured vehicle speed is in an acceleration feel improvement area, on the other hand, the vehicle sets the torque demand to an extent of or below a maximum allowable value of the torque demand to decrease with an increase in measured vehicle speed at a lower reduction rate than the specific reduction rate.

대표청구항 ▼

The invention claimed is: 1. A vehicle driven with output power of a power output apparatus, said vehicle comprising: an accelerator depression amount measurement unit that measures a driver's depression amount of an accelerator pedal or an accelerator depression amount; a vehicle speed measurement

The invention claimed is: 1. A vehicle driven with output power of a power output apparatus, said vehicle comprising: an accelerator depression amount measurement unit that measures a driver's depression amount of an accelerator pedal or an accelerator depression amount; a vehicle speed measurement unit that measures a speed of said vehicle or a vehicle speed; a first driving torque demand setting module that sets a driving torque demand required for said vehicle to decrease at a first reduction rate with an increase in measured vehicle speed against the measured accelerator depression amount; a second driving torque demand setting module that is activated, instead of said first driving torque demand setting module, at least when the measured accelerator depression amount is in a preset accelerator depression range of less than a maximum accelerator depression amount, said second driving torque demand setting module setting the driving torque demand to decrease at a second reduction rate, which is at least lower than the first reduction rate, with an increase in measured vehicle speed to an extent of or below a maximum allowable torque output from said power output apparatus; and a drive control module that drives and controls said power output apparatus to drive said vehicle with a torque equivalent to the set driving torque demand. 2. A vehicle in accordance with claim 1, wherein said second driving torque demand setting module sets the driving demand to ensure a greater output power of said power output apparatus with an increase in measured vehicle speed against the measured accelerator depression amount, compared with said first driving torque setting module. 3. A vehicle in accordance with claim 1, wherein said second driving torque demand setting module sets the lower driving torque demand at the second reduction rate, which decreases against the measured accelerator depression amount closer to a specific depression level in the preset accelerator depression range. 4. A vehicle in accordance with claim 1, wherein said second driving torque demand setting module sets the driving torque demand to increase with an increase in measured vehicle speed, at least when the measured accelerator depression amount is substantially equal to a specific depression level in the preset accelerator depression range. 5. A vehicle in accordance with claim 1, wherein said second driving torque demand setting module sets the driving torque demand to accelerate said vehicle at a substantially constant acceleration against the measured accelerator depression amount regardless of the measured vehicle speed in a preset vehicle speed range, at least when the measured accelerator depression amount is substantially equal to a specific depression level in the preset accelerator depression range. 6. A vehicle in accordance with claim 1, wherein said second driving torque demand setting module corrects the driving torque demand set by said first driving demand setting module to an increased value and sets the increased value to the driving torque demand. 7. A vehicle in accordance with claim 6, wherein said second driving torque demand setting module corrects the driving torque demand set by said first driving torque demand setting module to the increased value, based on a reduction of the driving torque demand set by said first driving torque demand setting module under acceleration of said vehicle for a time period between a start of acceleration and a present moment. 8. A vehicle in accordance with claim 7, wherein said second driving torque demand setting module corrects the driving torque demand set by said first driving torque demand setting module to the increased value, which becomes greater with an increase in reduction of the driving torque demand set by said first driving torque demand setting module. 9. A vehicle in accordance with claim 6, said vehicle further comprising: a driving resistance measurement unit that measures a driving resistance, wherein said second driving torque demand setting module corrects the driving torque demand set by said first driving torque demand setting module, to the increased value, based on the measured driving resistance. 10. A vehicle in accordance with claim 9, wherein said second driving torque demand setting module corrects the driving torque demand set by said first driving torque demand setting module to the increased value, which becomes greater with an increase in measured driving resistance. 11. A vehicle in accordance with claim 6, wherein said second driving torque demand setting module corrects the driving torque demand set by said first driving torque demand setting module to the increased value, based on the measured accelerator depression amount. 12. A vehicle in accordance with claim 11, wherein said second driving torque demand setting module corrects the driving torque demand set by said first driving torque demand setting module to the increased value, which becomes greater against the measured accelerator depression amount closer to a specific depression level in the preset accelerator depression range. 13. A vehicle in accordance with claim 1, wherein said power output apparatus comprises: an internal combustion engine; and a continuously variable transmission mechanism that converts power of the internal combustion engine by continuously variable torque conversion and outputs the converted power. 14. A vehicle in accordance with claim 1, wherein said power output apparatus comprises: an internal combustion engine; an electric power-mechanical power input output mechanism that is connected to an output shaft of the internal combustion engine and to a drive shaft linked with drive wheels of said vehicle and outputs at least part of output power of the internal combustion engine to the drive shaft; and a motor that is capable of inputting and outputting power from and to the drive shaft. 15. A vehicle in accordance with claim 14, wherein the electric power-mechanical power input output mechanism comprises: a three shaft-type power input output module that is linked to three shafts, the output shaft of the internal combustion engine, the drive shaft, and a third rotating shaft, and automatically determines power input from and output to a residual one shaft based on powers input from and output to any two shafts among the three shafts; and a generator that is capable of inputting and outputting power from and to the third rotating shaft. 16. A vehicle in accordance with claim 14, wherein the electric power-mechanical power input output mechanism comprises a pair-rotor motor that has a first rotor connected to the output shaft of the internal combustion engine and a second rotor connected to the drive shaft, and outputs at least part of the output power of the internal combustion engine to the drive shaft with input and output of electric power and mechanical power by electromagnetic function of the first rotor relative to the second rotor. 17. A control method of a vehicle that is driven with output power of a power output apparatus, said control method comprising the steps of: (a) setting a driving torque demand required for said vehicle to decrease at a first reduction rate with an increase in measured vehicle speed against a driver's depression amount of an accelerator pedal or accelerator depression amount; (b) at least when the accelerator depression amount is in a preset accelerator depression range of less than a maximum accelerator depression amount, instead of said step (a), setting the driving torque demand to decrease at a second reduction rate, which is at least lower than the first reduction rate, with an increase in measured vehicle speed to an extent of or below a maximum allowable torque output from said power output apparatus; and (c) driving and controlling said power output apparatus to drive said vehicle with a torque equivalent to the set driving torque demand. 18. A vehicle driven with output power of a power output apparatus, the vehicle comprising: An accelerator depression amount measurement unit that measures a driver's depression amount of an accelerator pedal or an accelerator depression amount; a vehicle speed measurement unit that measures a speed of the vehicle or a vehicle speed; a driving torque demand setting module that sets a driving torque demand required for the vehicle to have a decreasing tendency with an increase in measured vehicle speed against the measured accelerator depression amount; a driving torque demand correction module that, at least when the measured accelerator depression amount is in a preset accelerator depression range of less than a maximum accelerator depression amount, corrects the set driving torque demand by addition of a supplementary torque corresponding to the measured accelerator depression amount in a specific range that does not exceed a maximum possible driving torque output from the power output apparatus; and a drive control module that drives and controls the power output apparatus to drive the vehicle with a torque equivalent to the set or corrected driving torque demand. 19. The vehicle in accordance with claim 18, wherein additionally, when the measured vehicle speed is in a range between a preset first vehicle speed and a preset second vehicle speed, the driving torque demand correction module corrects the set driving torque demand by addition of the supplementary torque corresponding to the measured accelerator depression amount. 20. A control method of a vehicle that is driven with output power of a power output apparatus, the control method comprising: (a) setting a driving torque demand required for the vehicle to have a decreasing tendency with an increase in vehicle speed against a driver's depression amount of an accelerator pedal or accelerator depression amount; (b) at least when the accelerator depression amount is in a preset accelerator depression range of less than a maximum accelerator depression amount, correcting the set driving torque demand by addition of a supplementary torque corresponding to the accelerator depression amount in a specific range that does not exceed a maximum possible torque output from the power output apparatus; and (c) driving and controlling the power output apparatus to drive the vehicle with a torque equivalent to the set or corrected driving torque demand.