Hybird vehicle drive control apparatus, hybird vehicle drive control method, and program thereof

• US 20040235613A1
• Filed: 01/23/2004
• Published: 11/25/2004
• Est. Priority Date: 12/26/2001
• Status: Active Grant

• Current Assignee: Aisin AW Company Limited (Aisin Corp.)
• Original Assignee: Aisin AW Company Limited (Aisin Corp.)
• Inventors: Aoki, Kazuo, Okoshi, Toshio
• Granted Patent: US 6,960,152 B2
• Time in Patent Office: Days
• US Class Current: 477/3
• CPC Class Codes: B60K 1/02 comprising more than one electric motor
• CPC Class Codes: B60K 2006/268 Electric drive motor starts the engine, i.e. used as starter motor
• CPC Class Codes: B60K 2006/381 characterized by driveline brakes
• CPC Class Codes: B60K 6/383 One-way clutches or freewheel devices
• CPC Class Codes: B60K 6/445 Differential gearing distribution type
• CPC Class Codes: B60L 15/20 for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
• CPC Class Codes: B60L 2240/421 Speed
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60L 2240/425 Temperature
• CPC Class Codes: B60L 2240/525 Temperature of converter or components thereof
• CPC Class Codes: B60L 2250/26 by pedal actuation
• CPC Class Codes: B60L 50/15 with additional electric power supply with capacitors charged by engine-driven generators B60L50/40; with batteries charged by engine-driven generators B60L50/61
• 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 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 20/10 Controlling the power contribution of each of the prime movers to meet required power demand
• CPC Class Codes: B60W 2510/081 Speed
• CPC Class Codes: B60W 2510/083 Torque
• CPC Class Codes: B60W 2510/087 Temperature
• CPC Class Codes: B60W 2710/0666 Engine torque
• CPC Class Codes: B60W 2710/083 : Torque
• CPC Class Codes: Y02T 10/62 : Hybrid vehicles
• CPC Class Codes: Y02T 10/64 : Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/7072 : Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/72 : Electric energy management in electromobility

Abstract

A hybrid control device including a drive motor that compensates for an excessive or a deficient amount of engine torque with respect to a vehicle requirement torque and a controller that detects a torque limit index, which is an index that limits a drive motor torque, determines whether the torque limit index has exceeded a threshold value, limits the drive motor torque when the torque limit index has exceeded the threshold value, and adjusts the engine torque in accordance with a limiting of the drive motor torque.

Claims

1. A hybrid vehicle control device, comprising:

a drive motor that compensates for an excessive or a deficient amount of engine torque with respect to a vehicle requirement torque; and

a controller that;

detects a torque limit index, which is an index that limits a drive motor torque;

determines whether the torque limit index has exceeded a threshold value;

limits the drive motor torque when the torque limit index has exceeded the threshold value; and

adjusts the engine torque, in accordance with a limiting of the drive motor torque.

2. The hybrid vehicle control device according to claim 1, wherein the torque limit index is a temperature of a drive motor drive portion.

3. The hybrid vehicle drive control device according to claim 1, wherein the torque limit index is an electrical variable of a motor drive portion.

4. The hybrid vehicle control device according to claim 1, wherein the controller limits a regenerative torque during regeneration of the drive motor, the regeneration of the drive motor for absorbing the excessive amount of the engine torque with respect to the vehicle requirement torque.

5. The hybrid vehicle control device according to claim 2, wherein the controller limits a regenerative torque during regeneration of the drive motor, the regeneration of the motor for absorbing an excessive amount of the engine torque with respect to the vehicle requirement torque.

6. The hybrid vehicle control device according to claim 3, wherein the controller limits a regenerative torque during regeneration of the drive motor, the regeneration of the drive motor being for absorbing the excessive amount of the engine torque with respect to the vehicle requirement torque.

7. The hybrid vehicle control device according to claim 1, wherein the controller limits a powering torque during powering of the drive motor, the powering of the drive motor being for compensating for the deficient amount of the engine torque with respect to the vehicle requirement torque.

8. The hybrid vehicle control device according to claim 2, wherein the controller limits a powering torque during powering of the drive motor, the powering of the drive motor being for compensating for the deficient amount of the engine torque with respect to the vehicle requirement torque.

9. The hybrid vehicle control device according to claim 3, wherein the controller limits a powering torque during powering of the drive motor, the powering of the drive motor being for compensating for the deficient amount of the engine torque with respect to the vehicle requirement torque by the motor.

10. The hybrid vehicle control device according to claim 1, wherein the controller limits the drive motor torque that is required to move the hybrid vehicle backward when a reverse range is selected.

11. The hybrid vehicle control device according to claim 2, wherein the controller limits the drive motor torque that is required to move the hybrid vehicle backward when a reverse range is selected.

12. The hybrid vehicle control device according to claim 3, wherein the controller limits the drive motor torque that is required to move the hybrid vehicle backward when a reverse range is selected.

13. The hybrid vehicle control device according to claim 1, wherein the controller adjusts the engine torque equivalent to the limited drive motor torque amount.

14. The hybrid vehicle control device according to claim 10, wherein the controller stops the engine when the reverse range is selected.

15. The hybrid vehicle control device according to claim 11, wherein the controller stops the engine when the reverse range is selected.

16. The hybrid vehicle control device according to claim 12, wherein the controller stops the engine when the reverse range is selected.

17. The hybrid vehicle control device according to claim 1, wherein the hybrid vehicle includes:

an engine;

the drive motor;

a generator;

an output shaft connected to a drive wheel; and

a differential gear unit having three gear elements, each gear element being connected to the engine, the generator, and the output shaft, and the drive motor being connected to the output shaft.

18. A hybrid vehicle control method, comprising

detecting a torque limit index, which is an index that limits a drive motor torque of a drive motor that compensates for an excessive or a deficient amount of engine torque with respect to a vehicle requirement torque vehicle;

determining whether the torque limit index has exceeded a threshold value;

limiting the drive motor torque when the torque limit index has exceeded the threshold value; and

adjusting the engine torque in accordance with the limiting of the drive motor torque.

19. A program of a hybrid vehicle drive control as apparatus, comprising:

a routine that determines whether a torque limit index has exceeded a threshold value,

a routine that limits a drive motor torque when the torque limit index has exceeded the threshold value; and

a routine that adjusts an engine torque in accordance with the limiting of the drive motor torque.

20. A hybrid vehicle control device, comprising:

a drive motor that compensates for an excessive or a deficient amount of engine torque with respect to a vehicle requirement torque; and

a controller that;

determines whether a torque limit index has exceeded a threshold value,

limits a drive motor torque when the torque limit index has exceeded the threshold value; and

adjusts an engine torque in accordance with the limiting of the drive motor torque.