12th Jan 09
Maxwell ultracapacitor to provide burst
power to start cold diesel engines in buses
Vanner Inc., a manufacturer of electrical power conversion
products, has selected Maxwell Technologies BOOSTCAP ultracapacitor
modules to provide burst power for a retrofit diesel engine
starter system that Vanner has won a contract to install
in Chicago transit buses.
David Schramm, Maxwell's president and chief executive
officer, said that Vanner is purchasing 460 16-volt BMOD0500
modules through Maxwell's channel partner, Tecate Industries.
Each ultracapacitor module incorporates six 3,000-farad
BOOSTCAP cells to provide the power required for Vanner's
During the winter months, when temperatures fall below
freezing, vehicle batteries tend to lose voltage, which
reduces their cranking power and frequently requires that
buses be started with an external jump start.
"If it's below 25 degrees, buses stored outside must
be started and the engines allowed to run for up to an hour
to ensure proper operation," said CTA President Ron
Huberman. "By retrofitting our buses with these devices,
CTA will be able to reduce the amount of time buses idle,
lower emissions and noise for our neighbors, as well as
improve fuel efficiency by 30 percent during the winter
Vanner's ultracapacitor-based StartSentry starting system
is designed to hold a charge of energy so that the ultracapacitor
can aid in the starting of the vehicle. As the ultracapacitor
provides the bulk of the power when the vehicle is started,
the life of the battery and starter is increased. If the
battery voltage is too low for the vehicle to be started,
the ultracapacitor module will act as a "defibrillator"
to provide an on-board jump start. Unlike batteries, which
generate and store energy through an electrochemical process,
ultracapacitors store energy electrostatically, enabling
them to deliver full power output at extreme temperatures
down to 40 degrees below zero.
To learn further on Ultracapacitors visit, www.maxwell.com