DETROIT, March 30, 2017 /PRNewswire/ -- An industry first,
American Axle & Manufacturing's (AAM) EcoTrac ® disconnecting all-wheel drive (AWD) system dramatically
increased efficiency, safety and performance when it was introduced several years ago. Now, the second generation of EcoTrac will
further this mission with even greater system efficiency and packaging gains.
Originally launched on the 2014 Jeep Cherokee, AAM's EcoTrac Disconnecting AWD gives drivers the performance of an AWD vehicle
with the fuel economy of a front wheel drive vehicle by automatically and seamlessly using only the front wheels when AWD is not
required. The EcoTrac AWD system disconnects at the power transfer unit (PTU), so that the driveshaft stops spinning and
power is no longer sent to the rear wheels. Less spinning means less fuel consumption and fewer emissions. When the EcoTrac
system senses that road conditions necessitate AWD, EcoTrac automatically reconnects the PTU and rear drive module to seamlessly
provide AWD.
Launching next year, the second generation EcoTrac is even more efficient. It reduces the system drag of a typical AWD system
by more than 90 percent, as compared to 80 percent for the first generation. Furthermore, AAM was able to reduce the size and
weight of the EcoTrac system without affecting safety and functionality.
"AAM's EcoTrac was a groundbreaking technology that significantly increased fuel economy, vehicle handling and off-road
capability," said Phil Guys, AAM vice president and chief technology officer. "We have raised the
bar with our next generation EcoTrac. It is lighter and smaller with increased torque density. This means drivers will see
further fuel economy improvement while the reduced packaging footprint will allow our customers the flexibility to incorporate
other vehicle systems."
How EcoTrac works
Using advanced sensors and AAM's proprietary algorithms, the EcoTrac AWD system monitors and analyzes road
conditions and then disconnects many of the rotating components from the driveline when they are not needed. The
system disconnects at the power transfer unit (PTU) and the rear drive module (RDM) allowing large portions of the driveline
to stop rotating while in front-wheel drive mode, including both the PTU and RDM hypoid gear sets, the bearings associated with
the gear sets, and the driveshaft.
"When you add a traditional AWD system to a vehicle, it increases safety, but it also decreases fuel economy by one to three
miles per gallon," Guys said. "AAM's system offsets that fuel economy penalty but still allows drivers the safety and
functionality of an AWD system. It is a win-win for people who are looking for fuel-efficient AWD."
AAM's EcoTrac AWD system can be engaged with driver input or when Automated Transition Events (ATEs) occur. AAM software
engineers developed the unique codes in-house for the ATEs, which include both environmental and dynamic events such as lower
temperatures, rain detection and changes in slope. When it receives the ATE signal from the AAM electronic control unit to
engage AWD mode, the EcoTrac system engages AWD seamlessly without noticeable shifting to the driver.
AAM has supplied more than 600,000 EcoTrac AWD units to customers since its introduction. The next generation EcoTrac will
launch on a global vehicle in 2018. By the end of 2019, EcoTrac will represent about $700 million
of revenue for AAM in global markets.
About AAM
AAM (NYSE: AXL) is a world leader in the manufacture, engineering, design and validation of driveline and drivetrain
systems and related components and modules, chassis systems and metal-formed products for light trucks, sport utility vehicles,
passenger cars, crossover vehicles and commercial vehicles. In addition to locations in the United
States (Indiana, Michigan and Ohio), AAM also has offices or facilities in Brazil, China, Germany, India, Japan, Luxembourg, Mexico, Poland, Scotland, South Korea,
Sweden and Thailand. To learn more, visit www.aam.com.
To view the original version on PR Newswire, visit:http://www.prnewswire.com/news-releases/aams-next-generation-ecotrac-increases-fuel-economy-decreases-packaging-size-300431887.html
SOURCE AAM