Driver of electric automobile

• US 20050252701A1
• Filed: 06/04/2003
• Published: 11/17/2005
• Est. Priority Date: 09/24/2002
• Status: Active Grant

• Current Assignee: Japan Science And Technology Agency
• Original Assignee: Japan Science And Technology Agency
• Inventors: Shimizu, Hiroshi
• Granted Patent: US 7,255,185 B2
• Time in Patent Office: Days
• US Class Current: 180/65.100
• CPC Class Codes: B60K 17/356 having fluid or electric motor, for driving one or more wheels disposition of motor in, or adjacent to, traction wheel B60K7/00
• CPC Class Codes: B60K 23/0808 for varying torque distribution between driven axles, e.g. by transfer clutch
• CPC Class Codes: B60K 7/0007 the motor being electric
• CPC Class Codes: B60L 15/2009 for braking
• CPC Class Codes: B60L 2240/24 Steering angle
• CPC Class Codes: B60L 2240/642 Slope of road
• CPC Class Codes: B60W 2040/1307 Load distribution on each wheel suspension
• CPC Class Codes: B60W 2510/20 Steering systems
• CPC Class Codes: B60W 2540/18 Steering angle
• CPC Class Codes: B60W 2552/15 Road slope, i.e. the inclination of a road segment in the longitudinal direction
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles

Abstract

There is provided a driving device of an electric car, exactly selecting drive wheels of the electric car in accordance with road circumstances. In the electric car having four or more wheels, all wheels (1 to 4) have driving motors (5 to 8) placed therein, capable of driving and regenerative braking, and a plurality of the wheels (1 to 4) are selected so as to serve as drive wheels or regenerative brake wheels in accordance with traveling circumstances of the car.

Claims

1. A driving device of an electric car having four or more wheels, all wheels having driving motors capable of driving and regenerative braking, placed therein, wherein a plurality of the wheels are selected so as to serve as drive wheels or regenerative brake wheels in accordance with traveling circumstances of the car, and wherein the rear wheels or a group of the rear wheels are selected so as to serve as the drive wheels upon traveling on a level road and an upslope, and the front wheels or a group of the front wheels are selected so as to serve as the drive wheels upon traveling on a downslope.

3. The driving device of an electric car according to claim 1, wherein the radially outer wheels are selected so as to serve as the drive wheels upon turning.

4. The driving device of an electric car according to claim 1, wherein all wheels are selected so as to serve as the regenerative brake wheels upon braking.

2. (canceled)

5. A driving device of an electric car having four or more wheels, all wheels having driving motors capable of driving and regenerative braking, placed therein, wherein a plurality of the wheels are selected so as to serve as drive wheels or regenerative brake wheels in accordance with traveling circumstances of the car, and wherein the radially outer wheels are selected so as to serve as the drive wheels and the radially inner wheels are selected so as to serve as the regenerative brake wheels upon turning.

6. A driving device of an electric car having four or more wheels, all wheels having driving motors capable of driving and regenerative braking, placed therein, wherein a plurality of the wheels are selected so as to serve as drive wheels or regenerative brake wheels in accordance with traveling circumstances of the car, and wherein strokes of suspensions are used as determining information of the traveling circumstances for selecting the drive wheels.

8. The driving device of an electric car according to claim 6, wherein, upon traveling on a level road and an upslope, the rear wheels or a group of the rear wheels are selected so as to serve as the drive wheels, and, upon traveling on a downslope, the front wheels or a group of the front wheels are selected so as to serve as the drive wheels.

7. (canceled)