Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
RUNNING DISTANCE INTEGRATING METER FOR VEHICLE
Document Type and Number:
Japanese Patent JP2003302248
Kind Code:
A
Abstract:

To make difficult an illegal change of the stored running distance integrated value, in a running distance integrating meter having a non-volatile memory for storing a running distance integrated value.

This running distance integrating meter for a vehicle includes an ECU 16 for a meter for controlling the operation of a liquid crystal display panel 15 so that the running distance integrated value of the vehicle is displayed according to the storage content of an EEPROM 18. The ECU 16 for a meter is enciphers the running distance integrated value taking a combination of input levels to a plurality of ports P1 to Pn provided on a microcomputer 17 of the ECU 15 for the meter as a parameter, and the enciphered integrated value is stored in an EEPROM 18. In the case of displaying the integrated value, the enciphered integrated value taking a combination of the input levels to the plurality of ports P1 to Pn as a parameter is decoded, and a display is made according to the decoded integrated value.


Inventors:
IWASHIMA KEIICHI
Application Number:
JP2002105523A
Publication Date:
October 24, 2003
Filing Date:
April 08, 2002
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
DENSO CORP
International Classes:
G01C22/00; G06M3/00; G06M3/12; G07C5/00; (IPC1-7): G01C22/00; G06M3/00; G06M3/12; G07C5/00
Attorney, Agent or Firm:
Yoji Ito (2 outside)



 
Previous Patent: INERTIA DEVICE

Next Patent: CIRCUIT FOR DISPLACEMENT METER