Denso Corporation

Masaya Ohi

Yuzo Harata

Yasuyuki Takahashi

Takeshi Enosaki

Hideki Yakabe

Takao Mori

A gateway electronic control unit (ECU) includes an update condition table that indicates a vehicle load state that updates 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.

In-vehicle program update apparatus

An in-vehicle system comprising a gateway between multiple networks is disclosed. One of the networks specifies that when a source apparatus connected to the one of the networks sends a request message to a destination apparatus connected to another one of the networks, the source apparatus should time-out if the source apparatus does not receive a response message within a specified time after sending the request message. Upon receipt of the request message, the gateway relays the request message to the destination apparatus and sends a wait request code to the source apparatus to instruct the source apparatus to wait by extending the specified time.

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Okazaki, Japan

Masaya Ohi