Power output apparatus and automobile

• US 20040006419A1
• Filed: 03/31/2003
• Published: 01/08/2004
• Est. Priority Date: 04/09/2002
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Kimura, Akihiro
• Granted Patent: US 6,816,759 B2
• Time in Patent Office: Days
• US Class Current: 701/101
• CPC Class Codes: B60K 6/445 Differential gearing distribution type
• CPC Class Codes: B60W 10/06 including control of combustion engines
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 10/26 for electrical energy, e.g. batteries or capacitors
• CPC Class Codes: B60W 10/30 including control of auxiliary equipment, e.g. air-conditioning compressors or oil pumps
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 2710/24 Energy storage means
• CPC Class Codes: Y02T 10/62 Hybrid vehicles

Abstract

In a motor drive mode of a hybrid vehicle where an engine is at a stop and the vehicle is driven with only the power from a motor, the motor is driven and controlled in a range up to a specific electric power, which is calculated by subtracting a starting electric power Ps required to start the engine from a maximum electric power Pmax output from a battery. At the time of starting the engine, the control stops the operations of auxiliary machinery, which is driven with the electric power from the battery, until completion of the start of the engine.

Claims

1. A power output apparatus that is capable of outputting power from an internal combustion engine and power from a driving motor to a drive shaft, said power output apparatus comprising:

a secondary battery that supplies electric power to said driving motor;

a starting module that starts said internal combustion engine with a supply of electric power from said secondary battery; and

a control module that drives and controls said driving motor to output a required power in a preset range of driving electric power to said drive shaft while said internal combustion engine is at a stop, where the range of driving electric power is set as a difference between a maximum electric power output from said secondary battery and a starting electric power required by said starting module to start said internal combustion engine.

2. A power output apparatus in accordance with claim 1, wherein said control module sets the starting electric power in such a manner as to be lowered with an increase in revolving speed of said drive shaft, calculates the driving electric power from the setting of the starting electric power to drive and control said driving motor with the calculated driving electric power.

3. A power output apparatus in accordance with claim 1, said power output apparatus further comprising:

a three-shaft power input and output module that has a first shaft linked with an output shaft of said internal combustion engine, a second shaft linked with said drive shaft, and a third shaft, where power input into and output from a residual one shaft among the three shafts is determined according to powers input into and output from any two shafts among the three shafts,

wherein said starting module comprises a starting motor that is linked with said third shaft and is capable of generating electric power, and

said driving motor is linked with said drive shaft.

4. A power output apparatus in accordance with claim 1, said power output apparatus further comprising:

at least one auxiliary machinery that is driven with a supply of electric power from said secondary battery;

wherein said control module drives and controls said at least one auxiliary machinery to stop its operation until completion of a start of said internal combustion engine, while controlling said starting module to start said internal combustion engine, in response to a starting requirement of said internal combustion engine that is at a stop.

5. A power output apparatus in accordance with claim 4, wherein said control module controls said starting module to start said internal combustion engine in a continuous driving state of said at least one auxiliary machinery, in response to the starting requirement of said internal combustion engine, when said driving motor is driven and controlled to output the required power to said drive shaft in a specific range of electric power calculated by subtracting electric power required for actuation of said at least one auxiliary machinery from the driving electric power.

6. A power output apparatus in accordance with claim 4, wherein said control module sets the starting electric power in such a manner as to be lowered with an increase in revolving speed of said drive shaft, calculates the driving electric power from the setting of the starting electric power to drive and control said driving motor with the calculated driving electric power, and controls said starting module to start said internal combustion engine with the setting of the starting electric power.

7. A power output apparatus in accordance with claim 4, said power output apparatus further comprising:

a three-shaft power input and output module that has a first shaft linked with an output shaft of said internal combustion engine, a second shaft linked with said drive shaft, and a third shaft, where power input into and output from a residual one shaft among the three shafts is determined according to powers input into and output from any two shafts among the three shafts,

wherein said starting module comprises a starting motor that is linked with said third shaft and is capable of generating electric power, and

said driving motor is linked with said drive shaft.

8. An automobile that is driven with power from the internal combustion engine and power from the driving motor, which are output to the drive shaft linked with an axle, said automobile comprising:

a secondary battery that supplies electric power to said driving motor;

a starting module that starts said internal combustion engine with a supply of electric power from said secondary battery; and

a control module that drives and controls said driving motor to output a required power in a preset range of driving electric power to said drive shaft while said internal combustion engine is at a stop, where the range of driving electric power is set as a difference between a maximum electric power output from said secondary battery and a starting electric power required by said starting module to start said internal combustion engine.

9. An automobile in accordance with claim 8, wherein said control module sets the starting electric power in such a manner as to be lowered with an increase in revolving speed of said drive shaft, calculates the driving electric power from the setting of the starting electric power to drive and control said driving motor with the calculated driving electric power.

10. An automobile in accordance with claim 8, said automobile further comprising:

a three-shaft power input and output module that has a first shaft linked with an output shaft of said internal combustion engine, a second shaft linked with said drive shaft, and a third shaft, where power input into and output from a residual one shaft among the three shafts is determined according to powers input into and output from any two shafts among the three shafts,

wherein said starting module comprises a starting motor that is linked with said third shaft and is capable of generating electric power, and

said driving motor is linked with said drive shaft.

11. An automobile in accordance with claim 8, said automobile further comprising:

at least one auxiliary machinery that is driven with a supply of electric power from said secondary battery;

wherein said control module drives and controls said at least one auxiliary machinery to stop its operation until completion of a start of said internal combustion engine, while controlling said starting module to start said internal combustion engine, in response to a starting requirement of said internal combustion engine that is at a stop.

12. An automobile in accordance with claim 11, wherein said control module controls said starting module to start said internal combustion engine in a continuous driving state of said at least one auxiliary machinery, in response to the starting requirement of said internal combustion engine, when said driving motor is driven and controlled to output the required power to said drive shaft in a specific range of electric power calculated by subtracting electric power required for actuation of said at least one auxiliary machinery from the driving electric power.

13. An automobile in accordance with claim 11, wherein said control module sets the starting electric power in such a manner as to be lowered with an increase in revolving speed of said drive shaft, calculates the driving electric power from the setting of the starting electric power to drive and control said driving motor with the calculated driving electric power, and controls said starting module to start said internal combustion engine with the setting of the starting electric power.

14. An automobile in accordance with claim 11, said automobile further comprising:

a three-shaft power input and output module that has a first shaft linked with an output shaft of said internal combustion engine, a second shaft linked with said drive shaft, and a third shaft, where power input into and output from a residual one shaft among the three shafts is determined according to powers input into and output from any two shafts among the three shafts,

wherein said starting module comprises a starting motor that is linked with said third shaft and is capable of generating electric power, and

said driving motor is linked with said drive shaft.

15. A control method of controlling a power output apparatus, which comprises an internal combustion engine that is capable of outputting power to a drive shaft, a driving motor that is capable of outputting power to said drive shaft, a secondary battery that supplies electric power to said driving motor, and a starting module that starts said internal combustion engine with a supply of electric power from said secondary battery,

said control method comprising the steps of:

driving and controlling said driving motor to output a required power in a preset range of driving electric power to said drive shaft while said internal combustion engine is at a stop, where the range of driving electric power is set as a difference between a maximum electric power output from said secondary battery and a starting electric power required by said starting module to start said internal combustion engine.

16. A control method in accordance with claim 15, further comprising the step of:

setting the starting electric power in such a manner as to be lowered with an increase in revolving speed of said drive shaft, calculating the driving electric power from the setting of the starting electric power to drive and control said driving motor with the calculated driving electric power.

17. A control method of controlling a power output apparatus, which comprises an internal combustion engine that is capable of outputting power to a drive shaft, a driving motor that is capable of outputting power to said drive shaft, a secondary battery that supplies electric power to said driving motor, a starting module that starts said internal combustion engine with a supply of electric power from said secondary battery, and at least one auxiliary machinery that is driven with a supply of electric power from said secondary battery,

said control method comprising the steps of:

driving and controlling said driving motor to output a required power in a preset range of driving electric power to said drive shaft while said internal combustion engine is at a stop, where the range of driving electric power is set as a difference between a maximum electric power output from said secondary battery and a starting electric power required by said starting module to start said internal combustion engine,

driving and controlling said at least one auxiliary machinery to stop its operation until completion of a start of said internal combustion engine, while controlling said starting module to start said internal combustion engine, in response to a starting requirement of said internal combustion engine that is at a stop.

18. A control method in accordance with claim 17, further comprising the step of:

controlling said starting module to start said internal combustion engine in a continuous driving state of said at least one auxiliary machinery, in response to the starting requirement of said internal combustion engine, when said driving motor is driven and controlled to output the required power to said drive shaft in a specific range of electric power calculated by subtracting electric power required for actuation of said at least one auxiliary machinery from the driving electric power.

19. A control method in accordance with claim 17, further comprising the step of:

setting the starting electric power in such a manner as to be lowered with an increase in revolving speed of said drive shaft, calculating the driving electric power from the setting of the starting electric power to drive and control said driving motor with the calculated driving electric power, and controlling said starting module to start said internal combustion engine with the setting of the starting electric power.

20. A power output apparatus that is capable of outputting power from an internal combustion engine and power from a driving motor to a drive shaft, said power output apparatus comprising:

chargeable dischargeable accumulator means for supplying electric power to said driving motor;

starting means for starting said internal combustion engine with a supply of electric power from said secondary battery; and

control means for driving and controlling said driving motor to output a required power in a preset range of driving electric power to said drive shaft while said internal combustion engine is at a stop, where the range of driving electric power is set as a difference between a maximum electric power output from said secondary battery and a starting electric power required by said starting module to start said internal combustion engine.