DATA WRITE DEVICE AND DATA WRITE METHOD

• US 20110098904A1
• Filed: 10/22/2010
• Published: 04/28/2011
• Est. Priority Date: 10/28/2009
• Status: Active Grant

• Current Assignee: Fujitsu Ten Limited (DENSO Corporation)
• Original Assignee: Fujitsu Ten Limited (DENSO Corporation)
• Inventors: YAMAGUCHI, Kazuhi
• Granted Patent: US 8,606,481 B2
• Time in Patent Office: Days
• US Class Current: 701/99
• CPC Class Codes: F02N 11/0814 comprising means for controlling automatic idle-start-stop
• CPC Class Codes: F02N 11/0818 Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode
• CPC Class Codes: F02N 11/0829 related to special engine control, e.g. giving priority to engine warming-up or learning
• CPC Class Codes: G11C 16/102 External programming circuits, e.g. EPROM programmers; In-circuit programming or reprogramming; EPROM emulators
• CPC Class Codes: Y02T 10/40 Engine management systems

Abstract

A data write device receives power supply from a first system guided from a power source and writes data in a nonvolatile first storage unit. A request generation unit generates a write request to write data in the first storage unit under a predetermined condition. A receiving unit receives the write request from a user. A second storage unit receives power supply from a second system guided from the power source and is able to store data. A first write unit writes target data to be written, which is stored in the second storage unit, in the first storage unit in response to the write request. A second write unit writes the target data which is stored in the second storage unit, in the first storage unit if the power supply from the first system is stopped and then restarted at the time of writing by the first write unit. A display control unit causes a display device which carries out predetermined initial display when the power supply from the first system is stopped and then restarted, to display a write result of the target data in the first storage unit. The second write unit is activated when the request generation unit generates the write request and is not activated when receiving the write request from the user.

Claims

1. A data write device that receives power supply from a first system guided from a power source and writes data in a nonvolatile first storage unit, the data write device comprising:

a request generation unit that generates a write request to write data in the first storage unit under a predetermined condition;

a receiving unit that receives the write request from a user;

a second storage unit that receives power supply from a second system guided from the power source and is able to store data;

a first write unit that writes target data to be written, which is stored in the second storage unit, in the first storage unit in response to the write request;

a second write unit that writes the target data which is stored in the second storage unit, in the first storage unit if the power supply from the first system is stopped and then restarted at the time of writing by the first write unit; and

a display control unit that causes a display device which carries out predetermined initial display when the power supply from the first system is stopped and then restarted, to display a write result of the target data in the first storage unit,

wherein the second write unit is activated when the request generation unit generates the write request and is not activated when receiving the write request from the user.

2. The data write device as set forth in claim 1, wherein the display device is a portable device which is removably attached to the data write device.

3. The data write device as set forth in claim 2, wherein the receiving unit receives the write request from the user through the portable device.

4. The data write device as set forth in claim 1, wherein the display device is a display lamp which is fixedly arranged in a vehicle.

5. The data write device as set forth in claim 1, wherein the receiving unit receives the write request from the user through a user operation unit which is fixedly arranged in a vehicle.

6. The data write device as set forth in claim 1, further comprising a control unit that performs idling stop control to automatically stop and restart an engine of a vehicle,

wherein the target data is learning data regarding the idling stop control.

7. The data write device as set forth in claim 1, wherein the data write device is an electronic control device which is mounted in a vehicle.

8. A data write method of a data write device that receives power supply from a first system guided from a power source and writes data in a nonvolatile first storage unit, the data write method comprising:

a request generation step of generating a write request to write data in the first storage unit under a predetermined condition;

a receiving step of receiving the write request from a user;

a first write step of writing target data to be written, which is stored in a second storage unit that receives power from a second system guided from the power source and is able to store data, in the first storage unit in response to the write request;

a second write step of writing the target data which is stored in the second storage unit, in the first storage unit if the power supply from the first system is stopped and then restarted at the time of writing by the first write unit; and

a display control step of causing a display device which carries out predetermined initial display when the power supply from the first system is stopped and then restarted, to display a write result of the target data in the first storage unit,

wherein the second write step is carried out when the request generation unit generates the write request and is not carried out when receiving the write request from the user.