Denso Corporation

Toyota Jidosha Kabushiki Kaisha

Waka Noda

Takahiro Shidai

Seiji Miyamoto

Hiroyuki Hirano

Ryo Ito

Ryusuke Fukui

Yohsuke Satoh

An electronic control unit is incorporated as one of a plurality of electronic controllers composing a system for controlling in-vehicle devices on a distributed and mutually-synchronized control manner in a vehicle. The plurality of electronic control units are communicably connected with each other via an in-vehicle network to communicate information including the time-dependent data among the electronic control units. Each electronic control unit comprises a control member, an elapsed-time calculation component, and a validity determination component. The control member performs the control on the basis of time-dependent data acquired in time series relating to the vehicle. The elapsed-time calculation component is configured to calculate an elapsed time elapsing from acquisition of the time-dependent data. The validity determination component is configured to use the calculated elapsed time to determine whether or not the time-dependent data is valid or not for the control in terms of freshness of the time-dependent data.

Electronic control units for controlling in-vehicle devices using time-dependent data and vehicle control system integrating such units for real-time distributed control

An apparatus is provided for managing communication among a plurality of process means respectively operating on given control programs realizing functions necessary for a vehicle. The plural process means includes a first process means issuing requesting messages for requesting a function and a second process means receiving the requesting message, performing a process requested by each requesting massage, and sending back a response indicating results of the process to the first process means. In the apparatus, storage means stores therein, of the requesting massages issued, only response-waiting messages issued by the first process means and received by the second process means. A measuring component measures an elapse of time from a time when the request stored in the storage is received by the second process means. A determining component determines whether or not the elapse of time measured by the measuring component reaches a preset value.

Apparatus for administrating communication among on-vehicle electronic control units

A method and device for managing a task upraised according to receiving a processing request of services in in-vehicle electronic control units are provided. The method and device include the steps of: allocating a plurality of services to one task and determining whether or not the task assigned with the service is in process of execution in receiving the processing request of the service; and upraising the task to process the service of the received processing request when determination is made that the task is not in process of execution in the determining step, and making the task in process of execution continuously process the service of the received processing request without newly upraising the task when determination is made that the task is in process of execution in the determining step.

Method and device for managing tasks of in-vehicle electronic control unit

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Oobu, Japan

Waka Noda