We developed an innovative and practical inverse analysis technology, which can be applied to fully transient flow. Increase of temporal performance at target timing, as tumble flow rotation in early compress system or pressure loss in intake system, was achieved by applying present technology to engine In-cylinder flow and by modifying design shape of intake port or piston shape according to calculated surface geometry sensitivity distribution.

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A cylinder sleeve, made of metal composite material of aluminum powder and ceramic particles, is advantageous for weight reduction and for increase of engine power. However, the thickness and the extrusion speed of the sleeve are limited by the influence of copper, which is added for enhancement of hardness of matrix. The authors confirmed that the area ratio of the hard particles and necessary hardness could be maintained without adding copper by dispersing iron-silicon compounds. Using this technique, we developed a new alloy with enhanced scuff resistance that enabled higher speed for sleeve extrusion with thin-wall compared to conventional alloy.

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A road-vehicle cooperation system for automatic driving vehicle in service areas of highway is proposed. The automatic driving vehicle travelling in the service areas must avoid pedestrians who are difficult to detect by onboard sensors due to occlusion by parked vehicles. The roadside sensors, if they are fixed on the adequate points, can detect the pedestrians in the environment where a lot of vehicles are parked. Moreover, the flow lines of pedestrians are patterned as round trip between the parked vehicle and the area of facilities such as shops and restrooms to some degree and thus, the movement of pedestrians can be predicted by referring the data of the previous trajectories of pedestrians obtained by the fixed-point observation by roadside sensors. This study proposes information processing method of the road-side sensors to derive the probabilistic prediction information of pedestrians’ movement and speed control algorithm of the automatic driving vehicle using the information sent from the road-side computer, and validates the proposed road-vehicle cooperative speed control for automatic driving by simulations and experiments.

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An automobile driver generally concentrates on driving a car, while other passengers enjoy music, movie-video, and communication, or take a rest in the interior. Current luxury multi-channel sound system is made for all passengers to share sound information. However, each passenger originally needs the sound information of the individual for their purpose. So, in this research, multi-zone sound field control in the vehicle interior is studied by using multi-channel sound system. By reviewing the arrangement of some speakers, each target sound is easy to hear at each zone.

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In order to evaluate the performance of the vehicle-mounted device, to measure the incoming wave parameters of the real environment is important. Conventionally, there is a high-resolution estimation method such as MUSIC processing using the array antenna. However, the MUSIC algorithm can’t be applied simply to low frequency system such as FM broadcast, because the size of array antennas become too large. In this paper, we have developed the MUSIC method that combines the two antennas and RF recorder. As a result, it is shown that the proposed method is very effective.

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