FIELD: engines and pumps.
SUBSTANCE: invention is related to the field of propulsion engineering. Method for variation of software (SW) in control unit (CU) of internal combustion engine (ICE) of transport vehicle (TV) is realised so that CU is connected to computer, using password access is opened to data stored in memory device of TV ICE CU, and changes are introduced in mentioned data with further recording of coded message on legitimacy of conducted data variation. Memory device used is power-independent electrically erasable programmable read-only memory (EEPROM). During the first record of SW in EEPROM of ICE CU, program is also recorded in EEPROM for recognition of TV ICE CU command for changeover of TV ICE CU to mode of varied SW downloading and program of decoding. Varied SW is developed and coded. In order to change SW, command is sent for changeover of TV ICE CU into mode of changed SW downloading. By means of TV ICE CU, mentioned command is recognized, and TV ICE CU is changed over to mode of varied SW downloading. Coded SW is recorded into RAM of TV ICE CU and is decoded by means of decoding program. Decoded SW is recorded into EEPROM of TV ICE CU, afterwards EEPROM of TV ICE CU is closed for reading, and TV ICE CU is changed over to working mode.
EFFECT: increased extent of software protection against unauthorised replication and variation.
1 dwg
