ELECTRONIC CONTROL APPARATUS FOR ELECTRICALLY-DRIVEN VEHICLE

• US 20150221145A1
• Filed: 11/10/2014
• Published: 08/06/2015
• Est. Priority Date: 01/31/2014
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: NOMURA, Syunsuke
• Granted Patent: US 9,533,579 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 15/2009 for braking
• CPC Class Codes: B60L 2210/14 Boost converters
• CPC Class Codes: B60L 2220/14 Synchronous machines
• CPC Class Codes: B60L 2240/12 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 2250/26 by pedal actuation
• CPC Class Codes: B60L 3/0046 relating to electric energy storage systems, e.g. batteries or capacitors
• CPC Class Codes: B60L 3/0053 relating to fuel cells
• CPC Class Codes: B60L 3/0061 relating to electrical machines
• CPC Class Codes: B60L 3/12 Recording operating variables ; Monitoring of operating variables
• CPC Class Codes: B60L 58/12 responding to state of charge [SoC]
• CPC Class Codes: B60L 58/32 for controlling the temperature of fuel cells, e.g. by controlling the electric load
• CPC Class Codes: B60L 58/40 for controlling a combination of batteries and fuel cells
• CPC Class Codes: B60L 7/14 for vehicles propelled by ac motors
• CPC Class Codes: G07C 5/085 using electronic data carriers
• 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
• CPC Class Codes: Y02T 90/40 : Application of hydrogen technology to transportation, e.g. using fuel cells

Abstract

An electronic control apparatus controls am electrically-driven vehicle, which has no engine but has only a motor supplied with electric power from an electric power supply source. The electronic control apparatus has a self-diagnosis function for storing an abnormality code corresponding to a diagnosis object when abnormality of the diagnosis object is detected. The electronic control apparatus checks whether the motor and the electric power supply source are operating normally when a power control switch is turned on under a state that the abnormality code is stored in a memory. The electronic control apparatus checks whether abnormality is detected again in the diagnosis object, the abnormality code of which has already been stored, when the motor and the electric power supply source are operating normally. The electronic control unit erases the abnormality code when no abnormality is detected again.

Claims

1. An electronic control apparatus for controlling an electrically-driven vehicle, which has, as a drive power source for vehicle travel, a motor supplied with electric power from an electric power supply source without an engine, and having a self-diagnosis function for storing an abnormality code corresponding to a diagnosis object when abnormality of the diagnosis object is detected, the electronic control apparatus comprising:

a memory for storing the abnormality code indicative of the abnormality of the diagnosis object;

an operation check part for checking whether the motor and the electric power supply source are operating normally when a power control switch is turned on to supply electric power from the electric power supply source under a state that the abnormality code is stored in the memory;

an abnormality check part for checking whether abnormality is detected again in the diagnosis object, the abnormality code of which has already been stored in the memory, when the operation check part determines that both the motor and the electric power supply source are operating normally; and

an erasure part for erasing the abnormality code stored in the memory when the abnormality check part determines that no abnormality is detected again.

2. The electronic control apparatus according to claim 1, wherein:

the erasure part erases the abnormality code stored in the memory when the abnormality check part determines that no abnormality is detected again during a period, in which the power control switch is turned on a predetermined number of times.

3. The electronic control apparatus according to claim 1, wherein:

the vehicle is an electric vehicle having a battery, which is chargeable and dischargeable, as the electric power supply source.

4. The electronic control apparatus according to claim 1, wherein:

the vehicle is a fuel cell vehicle having a fuel cell and a battery, which is chargeable and dischargeable, as the electric power supply source.

5. The electronic control apparatus according to claim 4, wherein:

the operation check part checks whether the fuel cell is operating normally based on either one of a temperature of the fuel cell, a temperature rise of the fuel cell after the power control switch is turned on, and an integration value of a discharge quantity of the fuel cell.

6. The electronic control apparatus according to claim 3, wherein:

the operation check part checks whether the motor is operating normally based on either one of a temperature of the motor, a temperature rise of the motor after the power control switch is turned on, a drive torque required for the motor, and an integration value of power generated by regenerative braking of the motor.

7. The electronic control apparatus according to claim 3, wherein:

the operation check part checks whether the battery is operating normally based on either one of a temperature of the battery, a temperature rise of the battery after the power control switch is turned on, and an integration value of electric charging and discharging amount of the battery.

8. The electronic control apparatus according to claim 4, wherein:

the operation check part checks whether the motor is operating normally based on either one of a temperature of the motor, a temperature rise of the motor after the power control switch is turned on, a drive torque required for the motor, and an integration value of power generated by regenerative braking of the motor.

9. The electronic control apparatus according to claim 4, wherein:

the operation check part checks whether the battery is operating normally based on either one of a temperature of the battery, a temperature rise of the battery after the power control switch is turned on, and an integration value of electric charging and discharging amount of the battery.