Electric vehicle

• US 5,166,584 A
• Filed: 06/28/1991
• Issued: 11/24/1992
• Est. Priority Date: 07/05/1990
• Status: Expired due to Term

• Current Assignee: Nissan Motor Co., Ltd.
• Original Assignee: Nissan Motor Co., Ltd.
• Inventors: Origuchi, Masato, Fukino, Masato, Irie, Namio, Horie, Hideaki
• Primary Examiner(s): Ro, Bentsu
• Application Number:
  US07/723,019
• Time in Patent Office: 515 Days
• Field of Search: 318/139, 361/78, 361/79, 361/86, 361/87, 180/65.1, 180/65.2, 180/65.3, 180/65.4, 180/65.8
• US Class Current: 318/139
• CPC Class Codes: B60L 1/003 to auxiliary motors, e.g. for pumps, compressors
• CPC Class Codes: B60L 1/02 to electric heating circuits
• CPC Class Codes: B60L 1/14 to electric lighting circuits
• 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 2210/10 DC to DC converters
• CPC Class Codes: B60L 2240/12 Speed
• CPC Class Codes: B60L 2260/167 of motors or generators
• CPC Class Codes: B60L 3/06 Limiting the traction current under mechanical overload conditions
• CPC Class Codes: B60L 58/20 having different nominal voltages
• CPC Class Codes: B60L 7/18 Controlling the braking effect B60L7/12, B60L7/14, B60L7/16 take precedence
• CPC Class Codes: B60L 8/003 Converting light into electric energy, e.g. by using photo-voltaic systems
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• 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
• CPC Class Codes: Y02T 10/92 Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles

Abstract

In an electric vehicle driven by an electric motor, a battery accumulator supplies electricity to the electric motor and a plurality of auxiliaries. A generating unit generates electricity in order to charge the battery accumulator. A detector unit detects at least one of various running conditions of the vehicle. A control unit supplies the electricity from the generating unit directly to the electric motor when the detected running condition indicates an overload condition, and gradually reduces the electricity supplied to the auxiliaries.

Claims

1. An electric vehicle comprising:

an electric motor for driving the vehicle;

a plurality of auxiliaries mounted on the vehicle;

a battery accumulator for supplying electricity to said electric motor and said auxiliaries;

generating means for generating electricity in order to charge said battery accumulator;

detector means for detecting at least one of running conditions of the vehicle, including a speed sensor for detecting a speed of the vehicle and an accelerator opening sensor for detecting opening of an accelerator; and

control means for controlling the supply of the electricity from said generating means directly to said electric motor and for gradually reducing the electricity supplied to said auxiliaries when the detected running condition indicates the opening of said accelerator indicative of acceleration and/or overload caused by a high-grade incline climbing.

2. An electric vehicle according to claim 1, wherein said auxiliaries include an air conditioner, a defroster and a plurality of lamps.

3. An electric vehicle according to claim 1, wherein said generating means includes a generator mounted on the vehicle.

4. An electric vehicle according to claim 3, wherein said generating means includes a solar battery and a regenerative brake in addition to said generator.

5. An electric vehicle according to claim 1, wherein said control means is arranged so that an increasing rate of an amount of generated output by said generating means and a reducing rate of current supplied from said generating means to said auxiliaries are changed in accordance with a magnitude of an amount of load on said electric motor.