Denso Corporation

Toyota Jidosha Kabushiki Kaisha

Tetsuo Nakagawa

Tomohisa Kishigami

Tetsu Yamada

Katsunori Kamiya

Eiichi Komatsu

Toshio Nakagawa

Takuji Atomura

Takashi Yamasaki

Koji Fujimoto

Jun Katakawa

A communication load determining apparatus is used for a communication system which includes a plurality of communication devices performing communication via a common bus. The communication system operates in accordance with a communication protocol that defines which a priority order is set to each of the frames transmitted from the communication devices and which a frame having a lower priority has a longer transmission latency before being transmitted to the bus. In the communication load determining apparatus, a low-priority frame having a lower priority than other frames to the bus is transmitted, and a transmission latency of the low-priority frame is measured. The communication load determining apparatus determines whether or not abnormality has occurred in a communication load in the bus on the basis of the measured transmission latency to produce a determination result. The produced determination result is stored.

Communication load determining apparatus

A relay apparatus provided to a vehicle, performing first data communication with a first communication apparatus arranged outside the vehicle, and performing at least second data communication with multiple second communication apparatuses provided to the vehicle is provided. The relay apparatus includes a permission determination portion and an initiation switch portion. The permission determination portion determines whether first data communication between the first communication apparatus and a target second communication apparatus is permitted. The permission determination portion receives the first communication frame from the first communication apparatus through a connection switch portion determining a connection destination according to a control signal. The initiation switch portion outputs to the connection switch portion, the control signal designating the target second communication apparatus as the connection destination of the first communication apparatus.

Relay apparatus

An air intake device of an internal combustion engine which is capable of enhancing the air intake efficiency and reducing the size is provided. The internal combustion engine includes a cylinder head, an intake manifold provided at a longitudinal side surface of the cylinder head, and a head cover provided on the cylinder head. The air intake device of the internal combustion engine includes an air cleaner including an upper casing and a lower casing detachably coupled to each other and incorporating a filter element, an atmospheric air introduction pipe for introducing air to the air cleaner, and an intake pipe extending from the air cleaner to the intake manifold.

Air intake device of internal combustion engine

Growing community of inventors

Kariya, Japan

Tetsuo Nakagawa