VEHICLE DRIVING APPARATUS

• US 20190329658A1
• Filed: 04/19/2019
• Published: 10/31/2019
• Est. Priority Date: 04/26/2018
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho (Toyota Motor Corporation)
• Original Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho (Toyota Motor Corporation)
• Inventors: NAKAZAWA, Teruhiko, HIBINO, Ryoichi, KUSAKABE, Makoto, OSADA, Yasumitsu, NAKAHARA, Shoji, NISHIZAWA, Hiroyuki, TORII, Yasuhiro
• Granted Patent: US 10,926,647 B2
• Time in Patent Office: Days
• CPC Class Codes: B60K 1/02 comprising more than one electric motor
• CPC Class Codes: B60K 17/04 characterised by arrangement, location, or kind of gearing electric equipment or propulsion of electrically-propelled vehicles B60L
• CPC Class Codes: B60L 15/38 with automatic control
• CPC Class Codes: B60L 2220/42 with use of more than one motor
• CPC Class Codes: B60L 2220/50 Structural details of electrical machines
• CPC Class Codes: B60L 2270/14 of noise
• CPC Class Codes: B60L 2270/142 acoustic
• CPC Class Codes: B60L 2270/145 Structure borne vibrations
• CPC Class Codes: B60Y 2400/73 Planetary gearings
• CPC Class Codes: F16H 3/724 using external powered electric machines
• CPC Class Codes: F16H 3/727 with at least two dynamo electric machines for creating an electric power path inside the gearing, e.g. using generator and motor for a variable power torque path special adapted for a hybrid electric vehicle B60K6/20
• CPC Class Codes: F16H 57/0006 Vibration-damping or noise reducing means specially adapted for gearings devices for varying tension of belts, ropes or chains with damping means F16H7/0829; toothed members with construction providing vibration damping F16H55/14; reducing vibrations or noise of the gearbox casing F16H57/028; suppression of vibrations or noise of gear selectors F16H59/0208; control of hydrostatic fluid gearing preventing or reducing vibrations or noise F16H61/4183
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility

Abstract

A vehicle driving apparatus includes a first motor, a second motor, and a planetary mechanism, and obtains a driving force by combining motive forces obtained from the first motor and the second motor by a planetary gear of the planetary mechanism. The vehicle driving apparatus includes at least one of a design value and a control quantity in which a frequency ratio between a sound generated by a rotation of the first motor and a sound generated by a rotation of the second motor satisfies a reduction condition of dissonance.

Claims

1. A vehicle driving apparatus which obtains a driving force by combining a motive force of a first motor and a motive force of a second motor by a planetary mechanism, the vehicle driving apparatus comprising:

at least one of a design value and a control quantity in which a frequency ratio between a sound generated by a rotation of the first motor and a sound generated by a rotation of the second motor satisfies a reduction condition of dissonance.

2. The vehicle driving apparatus according to claim 1, wherein

a design item included in at least one of the first motor, tire second motor, and the planetary mechanism is set to a design value which satisfies the reduction condition of the dissonance.

3. The vehicle driving apparatus according to claim 2, wherein

at least one gear included in the planetary mechanism has a number of teeth which satisfies the reduction condition of the dissonance.

4. The vehicle driving apparatus according to claim 1, wherein

at least one of the first motor and the second motor is controlled to a number of rotations which satisfies the reduction condition of the dissonance.

5. The vehicle driving apparatus according to claim 4, wherein

at least one of the first motor and the second motor is controlled such that a difference in the number of rotations between the first motor and the second motor satisfies the reduction condition of the dissonance.

6. The vehicle driving apparatus according to claim 2, wherein

at least one of the first motor and the second motor is controlled to a number of rotations which satisfies the reduction condition of the dissonance.

7. The vehicle driving apparatus according to claim 6, wherein

at least one of the first motor and the second motor is controlled such that a difference in the number of rotations between the first motor and the second motor satisfies the reduction condition of the dissonance.

8. The vehicle driving apparatus according to claim 3, wherein

at least one of the first motor and the second motor is controlled to a number of rotations which satisfies the reduction condition of the dissonance.

9. The vehicle driving apparatus according to claim 8, wherein

at least one of the first motor and the second motor is controlled such that a difference in the number of rotations between the first motor and the second motor satisfies the reduction condition of the dissonance.

10. The vehicle driving apparatus according to claim 1, wherein

as the reduction condition of the dissonance, a condition is set in which a frequency ratio f_M1/f_M2 between a frequency f_M1 of the sound generated by the rotation of the first motor and a frequency f_M2 of the sound generated by the rotation of the second motor satisfies one of:

f_M1/f_M2<

0.87;

 

 

(condition

     1)

0.9943<

f_M1/f_M2<

1.0057; and

 

 

(condition

     2)

1.14<

f_M1/f_M2. 

 

(condition

     3)

11. The vehicle driving apparatus according to claim 2, wherein

as the reduction condition of the dissonance, a condition is set in which a frequency ratio f_M1/f_M2 between a frequency f_M1 of the sound generated by the rotation of the first motor and a frequency f_M2 of the sound generated by the rotation of the second motor satisfies one of:

f_M1/f_M2<

0.87;

 

 

(condition

     1)

0.9943<

f_M1/f_M2<

1.0057; and

 

 

(condition

     2)

1.14<

f_M1/f_M2. 

 

(condition

     3)

12. The vehicle driving apparatus according to claim 3, wherein

as the reduction condition of the dissonance, a condition is set in which a frequency ratio f_M1/f_M2 between a frequency f_M1 of the sound generated by the rotation of the first motor and a frequency f_M2 of the sound generated by the rotation of the second motor satisfies one of:

f_M1/f_M2<

0.87;

 

 

(condition

     1)

0.9943<

f_M1/f_M2<

1.0057; and

 

 

(condition

     2)

1.14<

f_M1/f_M2. 

 

(condition

     3)

13. The vehicle driving apparatus according to claim 4, wherein

as the reduction condition of the dissonance, a condition is set in which a frequency ratio f_M1/f_M2 between a frequency f_M1 of the sound generated by the rotation of the first motor and a frequency f_M2 of the sound generated by the rotation of the second motor satisfies one of:

f_M1/f_M2<

0.87;

 

 

(condition

     1)

0.9943<

f_M1/f_M2<

1.0057; and

 

 

(condition

     2)

1.14<

f_M1/f_M2. 

 

(condition

     3)

14. The vehicle driving apparatus according to claim 5, wherein

as the reduction condition of the dissonance, a condition is set in which a frequency ratio f_M1/f_M2 between a frequency f_M1 of the sound generated by the rotation of the first motor and a frequency f_M2 of the sound generated by the rotation of the second motor satisfies one of:

f_M1/f_M2<

0.87;

 

 

(condition

     1)

0.9943<

f_M1/f_M2<

1.0057; and

 

 

(condition

     2)

1.14<

f_M1/f_M2. 

 

(condition

     3)

15. The vehicle driving apparatus according to claim 6, wherein

as the reduction condition of the dissonance, a condition is set in which a frequency ratio f_M1/f_M2 between a frequency f_M1 of the sound generated by the rotation of the first motor and a frequency f_M2 of the sound generated by the rotation of the second motor satisfies one of:

f_M1/f_M2<

0.87;

 

 

(condition

     1)

0.9943<

f_M1/f_M2<

1.0057; and

 

 

(condition

     2)

1.14<

f_M1/f_M2. 

 

(condition

     3)

16. The vehicle driving apparatus according to claim 7, wherein

as the reduction condition of the dissonance, a condition is set in which a frequency ratio f_M1/f_M2 between a frequency f_M1 of the sound generated by the rotation of the first motor and a frequency f_M2 of the sound generated by the rotation of the second motor satisfies one of:

f_M1/f_M2<

0.87;

 

 

(condition

     1)

0.9943<

f_M1/f_M2<

1.0057; and

 

 

(condition

     2)

1.14<

f_M1/f_M2. 

 

(condition

     3)

17. The vehicle driving apparatus according to claim 8, wherein

as the reduction condition of the dissonance, a condition is set in which a frequency ratio f_M1/f_M2 between a frequency f_M1 of the sound generated by the rotation of the first motor and a frequency f_M2 of the sound generated by the rotation of the second motor satisfies one of:

f_M1/f_M2<

0.87;

 

 

(condition

     1)

0.9943<

f_M1/f_M2<

1.0057; and

 

 

(condition

     2)

1.14<

f_M1/f_M2. 

 

(condition

     3)

18. The vehicle driving apparatus according to claim 9, wherein

as the reduction condition of the dissonance, a condition is set in which a frequency ratio f_M1/f_M2 between a frequency f_M1 of the sound generated by the rotation of the first motor and a frequency f_M2 of the sound generated by the rotation of the second motor satisfies one of:

f_M1/f_M2<

0.87;

 

 

(condition

     1)

0.9943<

f_M1/f_M2<

1.0057; and

 

 

(condition

     2)

1.14<

f_M1/f_M2. 

 

(condition

     3)