International Journal of Automotive Engineering
Online ISSN : 2185-0992
Print ISSN : 2185-0984
ISSN-L : 2185-0992
Volume 3 , Issue 1
Showing 1-8 articles out of 8 articles from the selected issue
Research Paper
  • Masakuni Oikawa, Yusuke Ogasawara, Yoshikazu Kondo, Kanan Sekine, Yasu ...
    2012 Volume 3 Issue 1 Pages 1-8
    Published: 2012
    Released: March 25, 2016
    JOURNALS OPEN ACCESS
    A new ignition-combustion concept named PCC (Plume Ignition Combustion Concept), which ignite rich mixture plume in the middle of injection period or right after injection of hydrogen is completed, is proposed by the authors in order to reduce NOx emissions in high engine load conditions with minimizing trade-offs on thermal efficiency. In this study fundamental requirements of hydrogen jet and ignition timing to optimize PCC performance are investigated by using single and multi-hole nozzle with a combination of high speed laser shadowgraphy to visualize propagating flame. As a result, it was infered that igniting the mixture plume in the middle of injection period with minimizing jet penetration to chamber wall is effective reducing NOx formation even further.
    Download PDF (1895K)
  • Belhocine Ali, Bouchetara Mostefa
    2012 Volume 3 Issue 1 Pages 9-17
    Published: 2012
    Released: March 25, 2016
    JOURNALS OPEN ACCESS
    Download PDF (1998K)
  • Hossein Tehrani Niknejad, Mita Seiichi, Han Long, Huy Quoc
    2012 Volume 3 Issue 1 Pages 19-25
    Published: 2012
    Released: March 25, 2016
    JOURNALS OPEN ACCESS
    Inexpensive implementation of localization and environment mapping are critical issues for urban autonomous driving. We present a practical and low-cost navigation architecture to fuse different data from vehicle onboard sensors and estimate the vehicle state when individual observations such as GPS are noisy. We are trying to compensate the GPS errors by data fusion from different sensors in a probabilistic way and a particle filter with joint observations model has been proposed. We have evaluated the feasibility of proposed localization and navigation architecture for fully autonomous driving by doing many experiments in our campus including up and down slopes.
    Download PDF (1337K)
  • Hafsaoui Julien, Scordia Julien, Sellier Franck, Aubret Philippe
    2012 Volume 3 Issue 1 Pages 27-33
    Published: 2012
    Released: March 25, 2016
    JOURNALS OPEN ACCESS
    This paper describes the steps performed in the development of a lumped model of electrochemical battery, as well as its corresponding parameter identification assistant tool and the first results obtained. The numerical model is adapted for the LMS Imagine Lab AMESim simulation platform. This model makes it possible to simulate the dynamic voltage response of the battery as a function of current and temperature. This behavioral model uses the approach of equivalent electrical circuits to simulate the physical phenomena inside the battery. Thus, the open circuit voltage, the ohmic losses, the transfer of charge, the double layer capacitance and the diffusion of species can be represented. This model can be adapted for a large number of batteries and supercapacitors, representative of the latest generation of high power energy storage systems.
    Download PDF (921K)
Technical Paper
Research Paper
  • Soichi Hareyama, Ryuji Takada, Takayuki Shimodaira, Kazuhisa Tamura, A ...
    2012 Volume 3 Issue 1 Pages 47-53
    Published: 2012
    Released: March 25, 2016
    JOURNALS OPEN ACCESS
    This paper presents a method for estimating the absolute lock effect in bolted joints during off-road vehicle operation. There is a good linear relation between axial tension decrease tendency (Loosening phenomenon) and the operation time (or mileage or number of operations) after the tightening on logarithmic coordinates. Based on this relation, this report leads to two estimating methods described below. 1) Decrease of axial tension (self-loosening) is estimated accurately after long hours since tightening by measuring the initial axial tension behavior using the bolt loosening evaluation diagram. 2) Method of Estimating the locking device availability (usefulness) on actual machine operation is obtained from laboratory loosening test results.
    Download PDF (4362K)
Technical Note
  • Shunji Miyahara
    2012 Volume 3 Issue 1 Pages 55-61
    Published: 2012
    Released: March 25, 2016
    JOURNALS OPEN ACCESS
    In the WG for the study of technical requirement for UWB in the UWB Radio System Committee of MIC, the interference of 24GHz UWB radars toward the Earth Exploiting Satellite Service (EESS) has been studied. This study is based on the ITU recommendations and includes Japan inherent conditions. They are car density, building density and building height. As an area under study, the area (306[m2]) with highest population densities in Tokyo metropolitan is chosen. It is assumed that the satellite and radiometer are GCOM-W1and AMSR2, respectively. Results tell: the worst case, excluding the building reflection loss and having high activity factor, has the margin of 1.2 [dB] for the diffusion rate of the vehicles with UWB radar = 0.1% and the apportion = 1%, and another case including the reflection loss and low activity factor has that of 6.4[dB].
    Download PDF (932K)
feedback
Top