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Viewing 1 to 30 of 108
2015-04-14
Technical Paper
2015-01-1467
Chinmoy Pal, Tomosaburo Okabe, Kulothungan Vimalathithan, Jeyabharath Manoharan, Munenori Shinada
Abstract Logistic regression analysis for accident cases of NASS-PCDS (National Automotive Sampling System-Pedestrian Crash Data Study) clearly shows that the extent and the degree of pedestrian's lower extremity injury 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, bumper to knee ratio, bumper lead angle, age of the pedestrian, and posture of the pedestrian at the time of impact. The pedestrian population is divided in 3 groups, equivalent to small-shorter, medium-height and large-taller pedestrian with respect to the “pedestrian to BLE height-ratio” in order to quantify the degree of influence of lower leg injuries in each group. Large adult male finite element model (95th percentile male: 190 cm and 103 kg) was developed by morphing the Japan Automobile Manufacturers Association (JAMA) 50th percentile male.
2015-04-07
Article
Flagship sports sedan continues on front-drive platform, which has been stiffened but lightened and lowered. The coefficient of drag is reduced from 0.330 to 0.295 and fuel economy increased 15%.
2015-04-01
Article
New water-rejecting coating explored by chemists at University College London and other universities makes for tough self-cleaning surfaces that might work on motor vehicles.
2015-03-23
Article
While many automakers are adding more and more gears to their transmissions, others are going gearless. In this episode of SAE Eye on Engineering, Senior Editor Lindsay Brooke looks at the gearless CVT (Continuously Variable Transmission).
2015-02-17
Article
Nissan's new Le Mans contender upends the order of things by putting its whole powertrain at the front of the car.
2015-01-12
Article
After a frustrating and delay-ridden 10-year development, Nissan has unveiled its second-generation Titan--the first light-duty pickup that combines diesel V8 muscle with heavy-duty GVWR.
2014-12-29
Article
There's a vehicle revolution going on in North America that's been long overdue. And that's the transformation of the humble light van. In this episode of SAE Eye on Engineering, Senior Editor Lindsay Brooke looks at the new wave of vans that are changing this important vehicle segment. 
2014-12-11
Article
Are smaller pickup trucks about to make a big comeback? In this week's SAE Eye on Engineering, Senior Editor Lindsay Brooke examines the current midsize pickup market, and looks at what's still to come. 
2014-12-04
Article
Electric cars offer the big benefit of almost no maintenance. In this week's SAE Eye on Engineering, Senior Editor Lindsay Brooke looks at the almost maintenance-free life of owning an electric car. SAE Eye on Engineering can be viewed at http://youtu.be/iXo_jaFhZvw. 
2014-12-01
Article
Design and manufacturing challenges are becoming more complex and multi-dimensional, prompting design teams to expand their efforts to collaborate. This change is being aided by a shift to 3-D models, but that transition has issues that highlight the complexity of linking various groups.
2014-07-14
Article
Engineers from Nissan Technical Center NA detail the automaker's efforts to advance composite structural closures by developing and producing a high-volume, fully recyclable composite liftgate with low metal content, which debuted on the 2014 Rogue.
2014-04-23
Article
The 2015 model carries on with the same gasoline V6 as before, but a mass reduction, reduced drag, and tweaks to the drivetrain tuning for more efficiency combine to boost fuel economy by 20%.
2014-04-01
Technical Paper
2014-01-1973
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.
2014-04-01
Technical Paper
2014-01-0522
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.
2014-04-01
Technical Paper
2014-01-0489
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.
2014-04-01
Journal Article
2014-01-1797
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.
2014-04-01
Technical Paper
2014-01-1199
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.
2014-03-03
Article
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.
2014-02-17
Article
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.
2014-01-29
Article
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.”
2013-12-06
Article
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.
2013-10-07
Article
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.
2013-09-30
Article
The next-generation Rogue and the European-badged X-Trail are the first Nissan vehicles to use a co-developed Nissan-Renault architecture.
2013-09-11
Article
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.
2013-07-10
Article
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.
2013-07-03
Article
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.
2013-06-24
Article
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.
2013-06-24
Article
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.
2013-04-17
Article
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.
2013-04-10
Article
Nissan integrated the motor, inverter, and charging unit into a single stack under the hood, freeing up space and reducing mass.
Viewing 1 to 30 of 108

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