Patents Assigned to RTK Technologies Limited
  • Chipped engine control unit system having copy protected and selectable multiple control programs
    Patent number: 7236877
    Abstract: The present invention discloses a method for preventing a control program written in a first engine control unit (ECU) from running in a second ECU, comprising obtaining an ID number from the first ECU; encrypting the ID number; writing the encrypted ID number into a flash memory of the first ECU; encrypting the ID number again and writing the encrypted ID number into an EEPROM of the first ECU; and requiring the control program to match the encrypted ID number placed in the flash memory and the EEPROM before running the program, and if the match fails, terminating the control program from running further.
    Type: Grant
    Filed: October 27, 2004
    Date of Patent: June 26, 2007
    Assignee: RTK Technologies Limited
    Inventors: Frank Dudel, Mitchell W. Simmons, Todd G. Williams
  • Chipped engine control unit system having copy protected and selectable multiple control programs
    Patent number: 7047128
    Abstract: The present invention discloses a method for preventing a control program written in a first engine control unit (ECU) from running in a second ECU, comprising obtaining an ID number from the first ECU; encrypting the ID number; writing the encrypted ID number into a flash memory of the first ECU; encrypting the ID number again and writing the encrypted ID number into an EEPROM of the first ECU; and requiring the control program to match the encrypted ID number placed in the flash memory and the EEPROM before running the program, and if the match fails, terminating the control program from running further.
    Type: Grant
    Filed: December 12, 2002
    Date of Patent: May 16, 2006
    Assignees: RTK Technologies Limited
    Inventors: Frank Dudel, Mitchell W. Simmons, Todd G. Williams