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Viewing 1 to 30 of 49
2013-04-08
Technical Paper
2013-01-1759
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.
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.
2013-04-08
Journal Article
2013-01-1703
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.
2013-04-08
Technical Paper
2013-01-1087
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.
2011-09-11
Technical Paper
2011-24-0090
Giuseppe Correale, Aleksandr Rakitin, Andrey Nikipelov, Sergey Pancheshnyi, Ilya Popov, Andrey Starikovskiy, Taisuke Shiraishi, Tomonori Urushihara, Michael Boot
High-voltage nanosecond gas discharge has been shown to be an efficient way to ignite ultra-lean fuel air mixtures in a bulk volume, thanks to its ability to produce both high temperature and radical concentration in a large discharge zone. Recently, a feasibility study has been carried out to study plasma-assisted ignition under high-pressure high-temperature conditions similar to those inside an internal combustion engine. Ignition delay times were measured during the tests, and were shown to be decreasing under high-voltage plasma excitation. The discharge allowed instant control of ignition, and specific electrode geometry designs enabled volumetric ignition even at high-pressure conditions.
2009-07-06
Article
The 367 mpg that Nissan has mentioned for its all-electric 100-mi-range car won't be on the window sticker, but it will reflect DOE calculations for CAFE. Electric-car window stickers will have numbers in the 100-mpg range. Plug-in hybrid measurement procedures are still in development.
2010-03-10
Article
Electric-vehicle advocacy group pushes an accelerated plan to free America from oil imports.
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.
2017-07-19
Article
A U.K.-based consortium led by Nissan is aiming at greater energy density with advanced energy management from Hyperdrive Innovation.
2012-03-16
Article
Nissan’s goal with the DeltaWing experimental racecar is to explore new technologies for road cars. But it is a racecar, after all, and the Nissan DeltaWing will strut its motorsports stuff for the first time this June at the Le Mans 24 Hours.
2009-07-31
Article
A new conductive material is the focus of research under a joint project announced July 30 by lithium-ion battery maker EnerDel and automaker Nissan. The joint research for a new electrolyte will take place at the U.S.
2010-03-11
Article
The Leaf all-electric 4/5-passenger sedan will have "over 100 miles" (160 km) range on EPA LA-4 cycle and a 90 mph (150 kph) top speed.
2012-10-09
Article
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."
2011-02-10
Article
Range awareness displays, range extenders, and “security blanket” features minimize possible issues with range anxiety, as charging station infrastructure builds. Some 13,000 stations by 2012, concentrated in areas where sales are made, are expected to build confidence for electric vehicle owners and prospective buyers.
2013-01-28
Article
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.
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.
2016-02-05
Article
The £20 million consortium project will help pave the way for future generation EV batteries.
2010-01-05
Article
News regarding the buildup of an electric charging infrastructure is coming at an ever faster pace as electric vehicles of different forms trickle into the market.
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.
2011-10-18
Article
Through improvements to the MEA (membrane electrode assembly) and the separator flow path, Nissan engineers have significantly improved the power density of its newest generation fuel cell stack by 2.5 times greater than its 2005 model.
2016-10-06
Article
Nissan gives its 2017 compact crossover a hybrid-electric powertrain option and electric A/C.
2016-07-10
Article
The revamped midsize SUV gets claimed segment-leading towing capacity, a half-ton improvement versus the 2016MY vehicle.
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.
2008-12-31
Article
The company’s advance technology research and development strategy called the Orchard Concept is comprised of three parts: enrich R&D soil, seed and grow, and harvest. The concept is applied to four strategic technology fields: environment, safety, life onboard, and dynamic performance, on the definitive foundation of quality and cost.
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.
2008-07-08
Article
Nissan Motor Manufacturing in Europe is replacing some metal underhood components with high-performance polymers. It is using DuPont’s Minlon and Zytel products for the rocker cover and front cover of its 2.5-L turbodiesel engine.
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.
2010-12-14
Article
While the 2011 Leaf kicks off Nissan's EV future, the automaker also is moving aggressively on advanced ICEs and hybrids.
2009-10-07
Article
Jointly developed by Jatco, the new CVT is of the steel push-belt-and-pulley type. The new I-4 engine series will likely have a median displacement of 1.5 L and will be equipped with continuously variable valve timing on the intake and exhaust camshafts.
2015-12-09
Article
Secondary loop system shows promise for areas with long A/C cooling seasons, by providing thermal storage for idle stop and on acceleration. Reversible heat pump also fits into picture with higher heating efficiency for EVs.
Viewing 1 to 30 of 49

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