Into the DEAP
The Distributed Electrical Aerospace Propulsion project looks
toward a future optimized integrated propulsion system that will
allow cleaner, quieter, and more efficient performance incorporated
into a radically innovative airframe that will feature enclosed
electrically powered fans.
Inside the cell walls The high cost of lithium-ion batteries is a prison that has largely kept electric vehicles off the street; the keys to their release are more effective—but not more expensive—cell chemistries.
BMW i3 was born electric
The carbon-fiber-bodied city car is the German automaker's
first series-production entry into the electric-vehicle space.
High temperatures narrow material choices for
One of the biggest challenges confronting electric and
hybrid-electric vehicle designers today is how to manage the high
temperatures stemming from the electrical losses associated with
Even as high-profile fires create concern, battery and car makers
accelerate their move toward lithium-ion technology with advances
in cost, performance, and safety.
NASA's quest for maximum efficiency
As part of its hybrid body wing aircraft with turboelectric
distributed propulsion system, NASA has proposed to use a
superconducting and cryogenic electrical system to connect the
electrical output of the generators to the motors.
Electrifying, fast, quiet-and usually
IAV developed the e-Crossbike to prove the potential of electric
drive in one of the most demanding vehicle environments-motocross
racing. Here's how the engineering team did it.
Next-gen eAssist aims at cost reduction
Lower cost, lighter weight, more refinement-Chief Engineer Steve
Poulos gives a glimpse of GM's third-generation eAssist
mild-hybrid system now under development for 2015.
Fuel cells return to focus
While fuel-cell vehicles haven't been in the spotlight in
recent years compared with hybrids and EVs, hydrogen fuel cell
technology is regaining momentum as OEMs move to reduce their CO2
footprints. But cost and infrastructure challenges remain.
The case for class 8 hybrids
Hybrid technology may not be the best solution for all heavy-truck
applications, but a Caron Engineering expert explains how it can
still benefit Class 8 vehicles.
No more molecules!
Companies continue to invest in new chemistries for EV batteries,
but at least one company in the battery industry thinks it's
time to halt the unending search for new chemical formulations and
focus on driving down processing costs.
The buzz about electric aircraft
Emissions limits force the aviation industry to study hybrid and
battery-electric propulsion systems.
Car-to-X marks the secure beamforming
Intelligent networking of cars and infrastructure promises a future
of enhanced active safety and traffic efficiency, though as an open
and decentralized system, car-to-X is exposed to various attacks
against security and driver's privacy.
A look at factors that should be considered by OEMs when
implementing a telematics solution in the heavy-duty on- and
off-highway mobile equipment markets.
Prime time for batteries
Forecasts very on how many, and when, electrified vehicles will hit
the streets, but auto and battery makers are ramping up efforts
like there's no tomorrow.
In energy storage, materials matter
Batteries being electrochemical devices, innovation and advances in
chemistry and materials are key to what everyone agrees is the need
for improved performance and life.
Comparing thermal characteristics of Li-ion
Most Li-ion battery suppliers require that the cell temperature be
as uniform as possible to achieve optimal battery performance and
avoid battery system failure. But some materials in Li-ion cells
have low thermal stability.
The world plugs into EVs
As matters begin to settle in terms of connector types,
charge-station makers are ramping up to meet the needs of a growing
population of plug-in vehicles.
After 48 months' development, the 2011 Chevrolet Volt has
enetered series production. The pioneering "E-REV" is as
important to the mobility industry as it is to GM.
Creating the heart of Volt
GM's battery requirements meant creating new state-of-the-art
in-vehicle engery storage - and doing it in less than four years.
Top GM and supplier engineers reveal how they did it.
Engineering with maniacal focus
A dedicated, cohesive team and a conservative engineering approach
put this innovative vehicle into production at moon-shot
A unique electrified transaxle
Hybrid or not? Definitions aside, what really matters is GM wisely
leveraged its next-generation Two Mode propulsion technology to
give Volt greater overall efficiency.
Sweating the body details
Extensive wind-tunnel work gave Volt a shape that's slicker
than it looks. But engineers aren't happy with the curb
Achassis that Cruzes
To speed development and minimize cost, Volt shares key
underpinnings with its high-volume cousin.
A new role for the ICE
Volt's modified Family Zero inline four is along for the ride-
until it's needed.
Charging and connectivity
GM engineers designed in maximum flexibility for keeping the Volt
juiced up and connected- to the grid and to the Internet.