Vehicle Electrification - February 21, 2013 - 26

In hybrid systems,

mild beats wild

The orange cable
on the 115-V GM
eAssist beltalternator-starter
warns of highvoltage danger
that 48-V systems
avoid.

similar to planned 48-V mild hybrids. Both
use belt-alternator-starter devices to
generate power and to provide an electrical
boost to the IC engine. GM previously used
a 36-V belt-alternator-starter device for cars
like the Chevrolet Malibu Hybrid, but the
vehicle disappointed some customers who
expected strong-hybrid performance and
efficiency in a car bearing that nameplate.
Experts tell AEI that the relative
affordability of mild hybrids makes them
attractive as an add-on for base-model cars
to boost their efficiency in a cost-effective
and largely transparent way.

26

“Our game plan has been that we are
viewing that as next-generation base
powertrain content,” said Stephen Poulos,
GM Chief Engineer for eAssist. “You can only
exercise the physics you have available in a
conventional powertrain so far.”
GM is using its 115-V system because
the C/D-segment vehicles that use eAssist
need its additional power to start and stop
large-displacement, direct-injected, highcompression four-cylinder engines. But for
smaller, lighter cars, GM could well use the
lower voltage, said Poulos.
“It is totally in the cards to look at systems
that are a bit up or down from [eAssist] in
terms of power,” he said. “For a lot of vehicles
out there, that makes a lot of sense.”
SAE Vehicle Electrification evsae.com


http://www.evsae.com

Vehicle Electrification - February 21, 2013

Table of Contents for the Digital Edition of Vehicle Electrification - February 21, 2013

Vehicle Electrification - February 21, 2013
Contents
Forward
Tech Report
Classified Ad
In hybrid systems, mild beats wild
Upcoming from the editors
Vehicle Electrification - February 21, 2013 - Vehicle Electrification - February 21, 2013
Vehicle Electrification - February 21, 2013 - 1
Vehicle Electrification - February 21, 2013 - Contents
Vehicle Electrification - February 21, 2013 - Forward
Vehicle Electrification - February 21, 2013 - Tech Report
Vehicle Electrification - February 21, 2013 - 5
Vehicle Electrification - February 21, 2013 - 6
Vehicle Electrification - February 21, 2013 - 7
Vehicle Electrification - February 21, 2013 - 8
Vehicle Electrification - February 21, 2013 - 9
Vehicle Electrification - February 21, 2013 - 10
Vehicle Electrification - February 21, 2013 - 11
Vehicle Electrification - February 21, 2013 - 12
Vehicle Electrification - February 21, 2013 - 13
Vehicle Electrification - February 21, 2013 - 14
Vehicle Electrification - February 21, 2013 - 15
Vehicle Electrification - February 21, 2013 - 16
Vehicle Electrification - February 21, 2013 - 17
Vehicle Electrification - February 21, 2013 - 18
Vehicle Electrification - February 21, 2013 - 19
Vehicle Electrification - February 21, 2013 - 20
Vehicle Electrification - February 21, 2013 - 21
Vehicle Electrification - February 21, 2013 - 22
Vehicle Electrification - February 21, 2013 - Classified Ad
Vehicle Electrification - February 21, 2013 - In hybrid systems, mild beats wild
Vehicle Electrification - February 21, 2013 - 25
Vehicle Electrification - February 21, 2013 - 26
Vehicle Electrification - February 21, 2013 - 27
Vehicle Electrification - February 21, 2013 - 28
Vehicle Electrification - February 21, 2013 - 29
Vehicle Electrification - February 21, 2013 - Upcoming from the editors
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