IN-VEHICLE PROGRAM UPDATE APPARATUS

摘要

A gateway ECU includes an update condition table that indicates a vehicle load state capable of updating an ECU program corresponding to each of several ECUs. The gateway ECU wirelessly communicates with an external center apparatus to receive an update file. The gateway ECU uses the update condition table to determine whether the current vehicle load state equals a lightly loaded state capable of updating an ECU program or a heavily loaded state incapable of updating an ECU program. If the current vehicle load state is determined to equal the lightly loaded state, the gateway ECU updates an ECU program using the update file received from the center apparatus. If the current vehicle load state is determined to equal the heavily loaded state, the gateway ECU performs environment improvement control based on the update condition table to change the current vehicle load state to the lightly loaded state.

主权项

1. An in-vehicle program update apparatus mounted to a vehicle, comprising:
a storage portion to store an update condition table that indicates a vehicle load state capable of updating a program installed in each of a plurality of electronic control units included in an in-vehicle network system; an update file reception portion that wirelessly communicates with an external center apparatus and receives from the center apparatus an update file to update the program; an update determination section to determine, based on the update condition table stored in the storage portion, whether a current vehicle load state equals a lightly loaded state capable of updating a program corresponding to the update file or a heavily loaded state incapable of updating the program when the update file reception portion receives the update file; a program update section that uses the update file received by the update file reception portion to update the program corresponding to the update file when the update determination section determines the lightly loaded state; and an environment improvement section that performs an environment improvement control to change the current vehicle load state to the lightly loaded state based on the update condition table stored in the storage portion when the update determination section determines that the current vehicle load state equals the heavily loaded state.