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Kitamura S.,Japan Automobile Manufacturers Association Inc.
Annual Fuels and Lubes Asia Conference and Exhibition | Year: 2013

A presentation on JAMA engine oil activities covers engine design trends; improvement of engine oil quality; recommendations and benefits of low viscosity engine oil; international standardization of PCMO; Japanese OEM's recommendation on PCMO (Passenger Car Motor Oil); and market trends in Asia. This is an abstract of a paper presented at the 19th Annual Fuels & Lubes Asia Conference (Bangkok, Thailand 3/13-15/2013). Source


Isshiki T.,Japan Automobile Research Institute | Konosu A.,Japan Automobile Research Institute | Takahashi Y.,Japan Automobile Manufacturers Association Inc.
2014 IRCOBI Conference Proceedings - International Research Council on the Biomechanics of Injury | Year: 2014

The current test methods using a legform impactor cannot appropriately evaluate the probability of pedestrian lower limb injuries when applied to vehicles with high bumpers (high-bumper vehicles) because of a lack of pedestrian upper body part/function in the impactors. Therefore, since 2010 we have been developing a legform impact test method that can evaluate the probability of pedestrian lower limb injuries when applied to any type of vehicle, including high-bumper vehicles. In this research, as the second step of our study, we developed a finite element (FE) model of a Simplified Upper Body Part (SUBP) that can appropriately consider the influences of the upper body part of pedestrians. First of all, because it can be considered that the influences of the upper body part of pedestrians are passed on to the lower limb via the hip joint located at the top of the lower limb, we analyzed the influence of differences in load conditions applied to the hip joint on the probability of lower limb injuries. As a result, we identified factors that significantly influence the probability of lower limb injuries. Next, we developed a SUBP FE model considering the above-mentioned influential factors using the optimization method. As a result, we succeeded in developing a SUBP FE model that can appropriately consider the influences of the upper body part of pedestrians. Source


Isshiki T.,Japan Automobile Research Institute | Konosu A.,Japan Automobile Research Institute | Takahashi Y.,Japan Automobile Manufacturers Association Inc.
SAE International Journal of Transportation Safety | Year: 2015

Current legform impact test methods using the FlexPLI have been developed to protect pedestrians from lower limb injuries in collisions with low-bumper vehicles. For this type of vehicles, the influence of the upper body on the bending load generated in the lower limb is compensated by setting the impact height of the FlexPLI 50 mm above that of pedestrians. However, neither the effectiveness of the compensation method of the FlexPLI nor the influence of the upper body on the bending load generated in the lower limb of a pedestrian has been clarified with high-bumper vehicles. In this study, therefore, two computer simulation analyses were conducted in order to analyze: (1) The influence of the upper body on the bending load generated in the lower limb of a pedestrian when impacted by high-bumper vehicles and (2) The effectiveness of the compensation method for the lack of the upper body by increasing impact height of the FlexPLI for high-bumper vehicles. The results show that the upper body significantly influenced the bending load generated in the lower limb of a pedestrian. This influence was found to be bumper height dependent. In addition, method of compensation for the lack of the upper body by increasing impact height of the FlexPLI was found not to work for high-bumper vehicles effectively. These results suggest the need to develop a new test method that appropriately incorporates upper body representation regardless of bumper height. Copyright © 2015 SAE International. Source


De Dios E.D.P.,University of Navarra | Kindig M.,University of Virginia | Arregui-Dalmases C.,University of Navarra | Crandall J.,University of Virginia | And 4 more authors.
International Journal of Crashworthiness | Year: 2011

Efforts to mitigate thoracic injury under lateral impact require an understanding of the structural and fracture characteristics of individual ribs under lateral loading. While a number of studies have loaded segments of rib under three-point bending, this study is the first to investigate lateral loading onto entire ribs. Fifteen individual ribs were extracted, positioned upright and a lateral displacement at 1 m/sec was applied. Displacements at the time of fracture were relatively constant across rib levels at 18.3 ±3.7 mm. Fracture forces ranged from 27 N to 270 N at the anterior extremity and 103 N to 326 N at the posterior extremity; this was also insensitive to rib number. The strain gages indicated that the point immediately opposite the loader on the rib's internal surface experienced the highest tensile strains, while elsewhere the internal surface was in compression and the external surface was in tension. This structural-level rib characterisation can help to better understand the mechanisms of thoracic injury under lateral impact. © 2011 Taylor & Francis. Source


Nakamura Y.,Japan Automobile Manufacturers Association Inc.
Proceedings of the International Display Workshops | Year: 2012

JAMA executed the road tests to analyze driver's workload of various operations to the navigation systems. As a result, the JAMA guidelines regulated the world's first numerical criterion for display operations while driving. The paper describes the grounds of the criterion. Source

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