Allison Transmission reveals electric propulsion systems for commercial trucks, low-floor buses
Allison Transmission introduced the new AXE Series, a fully integrated electric powertrain system designed to fit inside a standard frame along the axles of commercial trucks. The AXE Series features electric motors, a two-speed gearbox, oil coolers, and pumps. The offering also includes power electronics for a complete powertrain solution.
“The AXE Series is the first e-axle in the heavy-duty truck industry to provide this level of power density, size, and simplicity," said David S. Graziosi, Allison Transmission President and CEO.
The Allison AXE Series has a one million-mile design life for medium- and heavy-duty trucks. The system integrates one or two high-speed electric motors and a multi-speed transmission, eliminating the need for additional driveshafts and support structures. A dual-motor axle has a continuous power of 536 hp (400 kW) and peak output power of 738 hp (550 kW). A tandem axle configuration is also available for these vehicles. The system is designed to handle 100% torque in regenerative braking. The complete integration of the AXE Series delivers increased efficiency and a claimed best-in-class continuous power through superior internal cooling.
The AXE Series is available in single- and dual-motor options to package the entire electric powertrain inside a standard frame. This allows the AXE Series to be a bolt-in solution by design to ensure efficiency in the installation process.
Also introduced by Allison Transmission is the new ABE Series, what the company says is the first e-axle advanced ultra-low floor electric bus powertrain system in the market. The ABE Series e-axles are designed to be fully integrated powerful and compact electric axles for the transit bus market.
The ABE Series integrates dual electric motors, a single- or multi-speed gearbox (depending on e-axle model), oil coolers, pumps, and power electronics into a bolt-in system that replaces the entire traditional powertrain within the existing frame. It is designed to meet the power and space demands of the transit bus industry, including heavy double-decker, articulated, and three-door buses.
Allison says its ABE Series can operate without restrictions at regular highway speeds and on all allowable grades. The system is designed to handle 100% torque in regenerative braking. The system provides an axle rating up to 28,660 lb (13 t). With a dual motor, it has continuous axle output power of 536 hp (400 kW) and peak output power of 738 hp (550 kW). A single speed e-axle option also is available. Its proprietary cooling allows for continuous motor power and allows the vehicle to run closer to peak power for longer durations.
The bolt-in ABE Series' compact design is meant to fit existing bus frames and suspensions to create more space for battery packs and other critical electric vehicle components. The standard system is configured for a 28-in (700-mm) walk through, but has an optional 39-in (1,000-mm) configuration. This makes the system applicable for 12-m low-floor city and double-decker buses, 18-m articulated buses, and three-door buses.