Last week at the Hybrid Truck Users Forum (HTUF) in Seattle, ArvinMeritor Inc. presented its latest information on the development of its dual-mode diesel-electric drivetrains for Class 8 trucks. ArvinMeritor is a leader in the development of dual-mode diesel-electric drivetrains, which have both mechanical and electrical propulsion systems for meeting the low-emissions, high-torque-output needs of the heavy-duty vehicle market.
"Previously, it was believed that these systems only made sense for vehicles with stop-and-go duty cycles," said Dennis Kramer, the company’s Hybrid Program Manager. ArvinMeritor’s dual-mode diesel-electric drivetrain uses an electric motor primarily for low-speed, high-load operating conditions, such as accelerating from a stop. Once the truck is moving, a mechanical propulsion system blends its power with the electric motor until the vehicle reaches highway speeds, where it completes the transition to a fully mechanical mode. When necessary, the electrical system can provide additional power during hill climbing, the company said.
To be accepted in the Class 8 truck market, alternative-power solutions must be seamless during everyday life in regional or long-haul service, such as having overnight power for the cab and sleeper.
Since January, ArvinMeritor has been working with partner Wal-Mart Transportation to develop a dual-mode, diesel-electric drivetrain for an International Class 8 ProStar tractor and an engine developed by Cummins Inc.
ArvinMeritor will provide the tandem axle, regenerative braking system, air disc brakes and advanced ABS with integrated stability control and driver assistance systems (from Meritor WABCO Vehicle Control Systems), software, electronic controls, transfer case, motors, as well as the battery power from a third party.
The partnership builds on ArvinMeritor’s work in other commercial vehicle markets. In March 2005, ArvinMeritor announced an arrangement with Unicell on a commercial pick-up and delivery program with an ArvinMeritor alternative drivetrain, featuring the company’s electric axle and system integration of motors, gears and controls. It offers zero emissions and no fossil fuel consumption, plus a ten percent increase in driver productivity from vehicle enhancements, the company said. (See the Purolator announcement elsewhere in New Product Watch.) For more information, visit www.arvinmeritor.com.
