Aura Systems has introduced a hybrid APU system for long-haul trucks that combines a small generator engine with an auxiliary battery pack.
The AuraGen ICS hybrid APU system (“Gen-a-Sys”) provides continuous electric power of up to 5 kW of electricity with the APU engine running and 3 kW when the APU engine is off. The driver activates the system by a push of a button mounted next to the steering wheel.
When the APU engine is turned off, the system draws power from the auxiliary battery pack that is sized to meet the operating time required by the customer. The system automatically monitors the batteries’ charge. When the batteries’ charge is low, the APU small engine automatically turns on and recharges the batteries using an optimum charging methodology. As soon as the batteries are charged, the APU engine automatically turns off and the system seamlessly returns to engine-off mode.
The AuraGen patented Bi-Directional Power Supply enables the seamless transition from battery power to APU-engine-generated power automatically. Unlike other systems, the APU engine is only used during low battery power levels.
Devices such as engine pre-warmers, air conditioners or heaters, refrigerators, microwave ovens, and televisions can all be used without idling the truck engine. This reduces fuel consumption and emissions during rest stops or while waiting for loading or unloading without sacrificing driver comfort.