Electric vehicle control device

• US 7,973,505 B2
• Filed: 01/31/2008
• Issued: 07/05/2011
• Est. Priority Date: 02/13/2007
• Status: Expired due to Fees

• Current Assignee: Aisin AW Company Limited (Aisin Corp.), Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Aisin AW Company Limited (Aisin Corp.), Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Kioka, Hiroaki, Okamura, Masaki, Hanada, Hideto, Iwatsuki, Ken, Suhama, Masayoshi
• Primary Examiner(s): Leykin; Rita
• Application Number:
  US12/312,553
• Publication Number:
  US 20100045224A1
• Time in Patent Office: 1,251 Days
• Field of Search: 318/432, 318/434, 318/375, 318/376, 318/400.3, 318/798, 318/800, 318/801, 318/805, 180/65.1, 180/62.25, 180/65.29, 180/65.8, 180/65.31, 180/65.265, 701/22, 701/46, 701/59
• US Class Current: 318/432
• CPC Class Codes: B60K 6/20 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60L 15/2045 for optimising the use of energy
• CPC Class Codes: B60L 2240/423 Torque
• CPC Class Codes: B60L 2240/486 Operating parameters
• CPC Class Codes: B60L 2250/12 by confirmation, e.g. of the input
• CPC Class Codes: B60L 2250/24 by lever actuation
• CPC Class Codes: B60L 2260/26 Transition between different drive modes
• CPC Class Codes: B60L 50/51 characterised by AC-motors
• CPC Class Codes: B60L 7/14 for vehicles propelled by ac motors
• CPC Class Codes: B60L 7/16 for vehicles comprising converters between the power source and the motor
• CPC Class Codes: B60L 7/18 Controlling the braking effect B60L7/12, B60L7/14, B60L7/16 take precedence
• CPC Class Codes: B60W 10/08 including control of electric propulsion units, e.g. motors or generators
• CPC Class Codes: B60W 2510/1005 Transmission ratio engaged
• CPC Class Codes: B60W 2520/10 Longitudinal speed
• CPC Class Codes: B60W 2540/10 Accelerator pedal position
• CPC Class Codes: B60W 2540/12 Brake pedal position
• CPC Class Codes: B60W 2710/083 Torque
• CPC Class Codes: B60W 30/18127 Regenerative braking
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• 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 10/72 : Electric energy management in electromobility

Abstract

When an electric vehicle outputs a torque instruction, firstly, a request torque is acquired and a judged whether the acquired request torque is positive or negative (S10) Regardless of the sign of the request torque, it is judged whether the eco-switch is ON (S12, S14) If the request torque has a positive sign and the eco-switch is OFF, a map A is selected (S20). If the eco-switch is ON, a map B which limits the maximum torque to a low value for the map A is selected (S22). If the request torque has a negative sign, a map C is selected regardless of the eco-switch ON/OFF state and the maximum torque is not limited (S24).

Claims

1. An electric vehicle control apparatus, comprising:

a drive section including a rotary electric machine and a power source device connected to the rotary electric machine; and

a control section for controlling the drive section, wherein;

the control section is provided with;

a low-fuel-consumption instruction acquisition unit for acquiring a low-fuel-consumption drive instruction from a user;

a drive/regeneration judging unit for judging whether the rotary electric machine is in a power drive mode or a regenerative mode; and

an output unit that, when the low-fuel-consumption drive instruction is acquired and the drive/regeneration judging unit judges that the rotary electric machine is in the power drive mode, a torque instruction under a limit torque characteristic having limited the maximum power driving torque at the time of normal running free from the low-fuel-consumption drive instruction is output in response to a request torque, and if the drive/regeneration judging unit judges that the rotary electric machine is in a regenerative mode, a torque instruction under the same torque characteristic of the maximum regenerative torque as that of the normal running is output according to the request torque.

2. The electric vehicle control apparatus according to claim 1, wherein the output unit changes a voltage increase ratio of the power source device and outputs a torque instruction under the limit torque characteristic.