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Viewing 1 to 30 of 96
Technical Paper
2014-04-01
Atsushi Mizutani
Abstract This paper describes the development of high efficiency and compact bumper recycling equipment for facilitating bumper recycling globally. Various equipment to remove paint coat from bumper has been developed since 90s', using mechanical, physical or chemical method. However, it is difficult to promote bumper recycling without realizing cost effective overall system from paint coat removal to pelletizing. Our company jointly developed method of mechanically removing paint coat and has committed to bumper recycling in the form of outsourcing since 2000. In 2010, a dedicated plant for recycling bumpers was launched on the premises of our Oppama Assembly Plant in Japan. In the future, promoting bumper recycling at other overseas assembly plants is necessary as vehicle production will expand globally. Having more compact and cost effective recycling system compared to the one at the Oppama plant is required since the scale of the system including bumper crushing, paint coat removal, and pelletizing has to match processing capacity at these plants rather than equipping large one like Oppama's.
Technical Paper
2014-04-01
Chinmoy Pal, Tomosaburo Okabe, Kulothungan Vimalathithan, Muthukumar Muthanandam, Jeyabharath Manoharan, Satheesh Narayanan
Abstract A comprehensive analysis was performed to evaluate the effect of BMI on different body region injuries for side impact. The accident data for this study was taken from the National Automotive Sampling System-Crashworthiness Data System (NASS-CDS). It was found that the mean BMI values for driver and front passengers increases over the years in the US. To study the effect of BMI, the range was divided into three groups: Thin (BMI<21), Normal (BMI 24-27) and Obese (BMI>30). Other important variables considered for this study were model year (MY1995-99 for old vehicles & MY2000-08 for newer vehicles), impact location (side-front F, side-center P & side-distributed Y) and direction of force (8-10 o'clock for nearside & 2-4 o'clock for far-side). Accident cases involving older occupants above 60 years was omitted in order to minimize the bone strength depreciation effect. Results of the present study indicated that the Model Year has influence on lower extremity injuries. Occurrence of pelvis injury was found to be influenced by BMI and was validated with logistic regression analysis.
Technical Paper
2014-04-01
Chinmoy Pal, Tomosaburo Okabe, Kulothungan Vimalathithan, Jeyabharath Manoharan, Muthukumar Muthanandam, Satheesh Narayanan
Abstract A logistic regression analysis of accident cases in the NASS-PCDS (National Automotive Sampling System-Pedestrian Crash Data Study) database clearly shows that pedestrian pelvis injuries tend to be complex and depend on various factors such as the impact speed, the ratio of the pedestrian height to that of the bonnet leading edge (BLE) of the striking vehicle, and the gender and age of the pedestrian. Adult female models (50th %ile female AF50: 161 cm and 61 kg; 5th %ile female AF05: 154 cm and 50 kg) were developed by morphing the JAMA 50th %ile male AM50 and substituting the pelvis of the GHBMC AM50 model. The fine-meshed pelvis model thus obtained is capable of predicting pelvis fractures. Simulations conducted with these models indicate that the characteristics of pelvis injury patterns in male and female pedestrians are influenced by the hip/BLE height ratio and to some extent by the pelvis bone shape. A previously developed six-year-old (6YO) child pedestrian model and the newly developed models were used to estimate the head impact time (HIT) for a typical SUV fitted with an active pop-up hood system.
Technical Paper
2014-04-01
Daisuke Takaki, Hirofumi Tsuchida, Tetsuya Kobara, Mitsuhiro Akagi, Takeshi Tsuyuki, Morihiro Nagamine
Abstract This paper presents a study of a cooled exhaust gas recirculation (EGR) system applied to a turbocharged gasoline engine for improving fuel economy. The use of a higher compression ratio and further engine downsizing have been examined in recent years as ways of improving the fuel efficiency of turbocharged gasoline engines. It is particularly important to improve fuel economy under high load conditions, especially in the turbocharged region. The key points for improving fuel economy in this region are to suppress knocking, reduce the exhaust temperature and increase the specific heat ratio. There are several varieties of cooled EGR systems such as low-pressure loop EGR (LP-EGR), high-pressure loop EGR (HP-EGR) and other systems. The LP-EGR system was chosen for the following reasons. It is possible to supply sufficient EGR under a comparatively highly turbocharged condition at low engine speed. It is important for knocking suppression to remove nitrogen oxides (NOx) from the EGR gas, which means using EGR gas from the catalyst downstream.
Technical Paper
2014-04-01
Kayo Otokawa, Koichi Hayasaki, Tatsuo Abe, Kenichiro Gunji
This paper describes the performance evolution and key breakthroughs of the world's first one-motor two-clutch (1M2CL) parallel full hybrid system without a torque converter that was developed and implemented on a hybrid luxury sedan in November 2010. The high potential of this hybrid system was brought out further to improve fuel economy without sacrificing acceleration performance. The resultant second generation of the 1M2CL parallel full hybrid system was applied to a hybrid premium sports sedan in August 2013. In order to improve these performance attributes, the following key technical measures were adopted: 1 Motor torque during the EV mode was increased to expand the EV drive region.2 Maximum motor torque and battery power at engine startup were boosted to reduce the engine start time.3 Integrated control of the motor and clutches was improved.4 Mechanical efficiencies were improved for higher fuel economy. Increasing the motor torque was an especially key technical measure for expanding the EV drive region and reducing the engine start time.
Article
2014-03-03
At the Geneva International Motor Show this week, Nissan is introducing a rearview mirror that incorporates an LCD monitor. When put into the market, the unit will enable drivers to turn the conventional mirror into an LCD monitor.
Article
2014-02-17
Now in her 13th year with Nissan’s advanced planning department, Rachel Nguyen is responsible for looking at the longer-term trends affecting the automotive market and how the automaker thus responds in its future products.
Article
2014-01-29
Nissan’s Datsun unit on Jan. 22 released a sketch of a concept car, saying it “represents a possible direction for the future expansion of Datsun’s model lineup for up-and-coming young customers in high-growth markets such as India.”
Article
2013-12-06
2015 Nissan GT-R and 2014 Sentra "concept" introduced at Los Angeles Auto Show, along with 2014 NISMO RS version of Juke, join the "just NISMO" that's already on sale. GT-R's 3.8-L V6 is up from 545 to 600 hp (406 to 488 kW). Juke RS performance raised to 215 hp (160 kW) with six-speed manual.
Article
2013-10-07
Considering various factors including number of patent applications, the IP & Science business of Thomson Reuters puts Ford, Honda, Nissan, and Toyota on its 2013 Top 100 Global Innovators list. Joining those OEMs on the list are several automotive suppliers including Delphi, Jatco, NGK Spark Plug, and Valeo.
Article
2013-09-30
The next-generation Rogue and the European-badged X-Trail are the first Nissan vehicles to use a co-developed Nissan-Renault architecture.
Article
2013-09-11
The curvy Q30 Concept, which debuted Sept. 10 at the Frankfurt Motor Show, serves as the design precursor for Infiniti’s future compact premium entry, production of which is expected to start in Sunderland, U.K., in 2015.
Article
2013-07-10
Engineers and other specialists at Ford of Europe’s Aachen, Germany, Advanced Technology Center are concentrating on what materials and powertrains will be needed—and which will be feasible—for the vehicles of the 2020s and 2030s.
Article
2013-07-03
The two automakers rank No. 1 and 2 globally in fuel cell patents. They have agreed to an "all in" major effort to create a common design and bill of materials for a stack architecture and hydrogen storage system for use in GM and Honda vehicle applications by 2020.
Article
2013-06-24
There are many different lightweighting materials and methods, but which one to pursue? Various recent studies try to sway automakers to choose one material over another.
Article
2013-06-24
Nissan sees public charging stations as essential to building "range confidence" and opening the EV market to apartment dwellers and commercial vehicle users; the faster-charge 220-V system is standard on higher-trim models of the Leaf, and the company will offer a battery-replacement program for the Leaf on a lease-like basis starting next year.
Article
2013-04-17
Technologies such as adaptive cruise control and lane-departure warning are doing more than improving safety today. They’re also setting the stage for autonomous vehicles, showing buyers that the technology works while building volumes that will eventually help make autonomous vehicles affordable.
Article
2013-04-10
Nissan integrated the motor, inverter, and charging unit into a single stack under the hood, freeing up space and reducing mass.
Technical Paper
2013-04-08
Hirofumi Shimizu, Takahito Okubo, Izuho Hirano, Shigeaki Ishikawa, Makoto Abe
This paper describes a newly developed electrified powertrain that incorporates various energy-saving improvements and is intended for use on a 2013 model year EV. Based on a 2011 model year EV that was specifically designed and engineered as a mass-produced EV, this powertrain integrates the traction motor, inverter and charging unit to achieve a smaller, lighter package for expanding application to more vehicles. Integration of the motor and inverter in particular reduced the part count for enhanced assembly ease, in addition to reducing heat transfer, noise and vibration. The specific features described in the paper are the three points below. Improving the layout of the inverter parts in order to downsize and integrate the inverter with the motor. Reducing the transfer of heat from the motor to the inverter. Reducing the excitation forces of the motor and optimizing the inverter for noise and vibration.
Technical Paper
2013-04-08
Yusuke Sato, Masahiko Kondo
With growing demands for better fuel economy and reduced carbon emissions there is a need for smaller and more fuel efficient engines. At the same time, to improve passenger comfort there are also demands placed on improved vehicle quietness [1]. A Homogeneous Charge Compression Ignition (HCCI) system or a higher compression ratio system can be used to obtain better fuel economy but the enhanced combustion rate causes an increase in engine vibration in the medium to high frequency range [2, 3]. To ensure vehicle quietness, this issue of structure-borne noise that is transmitted from the engine mounts to the body must be addressed. In this paper a simple anti-vibration active mount system is introduced that can significantly reduce structure-borne noise at medium to high frequencies. This is achieved by adding mass to the insulator which leads to resonance at lower frequencies, in order to obtain double anti-vibration performance. This works to significantly reduce the transmission of approximately 300Hz to 1000Hz noise to the body.
Technical Paper
2013-04-08
Kazuya Iwata, Kaoru Tatsu, Hidetsugu Saeki, Tomosaburo Okabe
A new highly biofidelic side impact dummy, the WorldSID 50th percentile male, has been developed under the supervision of the International Organization for Standardization in order to harmonize a number of existing side impact dummies in one single dummy. Momentum is growing for using the WorldSID in safety tests in the EU and the US. In the present study, two Euro-NCAP pole side impact tests were conducted to compare ES-2 and WorldSID responses in a mid-size SUV with respective seating positions as stipulated in the Euro-NCAP test conditions and fitted with the same side airbag. It was found that, compared with ES-2, the chest, abdomen and pelvis accelerations of WorldSID are more sensitive to variation in the applied external load transmitted by the deployed side airbag and door intrusion.
Technical Paper
2013-04-08
Hitoshi Uno, Yusuke Kageyama, Akira Yamaguchi, Tomosaburo Okabe
Implementation of appropriate safety measures, either from the viewpoint of a vehicle or the society or the infra-structure, it is an important issue to clearly understand the multi-dimension complicated real world accident scenarios. This study proposes a new method to easily capture and to extract the essence of such complicated multi-dimension mutual relationship by visualizing the results of SOM (Self Organizing Map). The FARS data from 2010 is used to generate a dataset comprised of 16,180 fatal passenger car drivers and 48 variables. The 16,180 fatal drivers were clustered using hierarchy cluster analysis method and mapped into a two-dimensional square with one dot representing one fatal driver using SOM. From the SOM assessment of the 16,180 fatal drivers, five clusters were created, and they are characterized as follows: Cluster 1 (Interstate highway accidents), Cluster 2 (Drunk speeding), Cluster 3 (Non speeding lane departure), Cluster 4 (Vehicle to vehicle) and Cluster 5 (Intersection).
Technical Paper
2013-04-08
Tommaso Lucchini, Luca Cornolti, Gianluca Montenegro, Gianluca D'Errico, Marco Fiocco, Atsushi Teraji, Taisuke Shiraishi
A correct prediction of the initial stages of the combustion process in SI engines is of great importance to understand how local flow conditions, fuel properties, mixture stratification and ignition affect the in-cylinder pressure development and pollutant formation. However, flame kernel growth is governed by many interacting processes including energy transfer from the electrical circuit to the gas phase, interaction between the plasma channel and the flow field, transition between different combustion regimes and gas expansion at very high temperatures. In this work, the authors intend to present a comprehensive, multi-dimensional model that can be used to predict the initial combustion stages in SI engines. In particular, the spark channel is represented by a set of Lagrangian particles where each one of them acts as a single flame kernel. Each particle is convected by the gas flow and its growth is governed by flame speed and thermal expansion due to the energy transfer from the electrical circuit.
Article
2013-02-19
With an initial focus on autonomous driving and connected cars, the Renault-Nissan Alliance on Feb. 18 celebrated the official opening of a Silicon Valley advanced research center. Located in Sunnyvale, CA, the NRC-SV is part of Nissan's global strategy to expand and localize its R&D function in strategic markets.
Article
2013-02-07
Nissan's motorsports division pumps up the power quotient with the new version of its crossover. The vehicle is Nismo's first high-performance production vehicle of the Z sports car which first appeared in 2007.
Article
2013-01-28
With the expectation of launching "the world's first affordable, mass-market fuel-cell electric vehicles (FCEVs)" as early as 2017, Daimler, Ford, and Nissan on Jan. 28 announced an agreement to work together in that cause.
Article
2013-01-15
The concept provides clear indications about what the next Murano will look like, according to Andy Palmer, Vice President of Global Product Planning, Nissan.
Article
2012-12-14
Nissan recently began operations of its new advanced-battery plant in Tennessee that will supply the energy-storage devices for the Nissan Leafs to be produced at an adjoining vehicle-assembly plant. Regular North American production of the Leaf is to start at the automaker's Smyrna plant early in 2013.
Article
2012-10-09
Two recent announcements attest to continuing efforts by government and industry to make the hydrogen fuel cell vehicle viable. On Oct. 5, the U.S. Department of Energy said it would make available $1 million for efforts to "identify cost-effective and efficient materials and processes to produce hydrogen from renewable energy sources and natural gas."
Article
2012-10-02
At the 2012 Paris Motor Show, Nissan explores urban crossover SUV styling with a "realistic" fuel-cell electric drivetrain.
Viewing 1 to 30 of 96

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