The new X12 engine has greater power density than all its competitors in the 11-13L range, Cummins claims. Customers that opt for the X12 with the Autocar ACX will see a significant weight savings of 733 lbs. versus the previous 12L engine, which means that weight will be available as more payload in these trucks.
Cummins explained that it shaved off all that weight with a sculpted engine block design along with weight reductions in the after-treatment system, power take-off, and other components. Meanwhile, the X12 also offers improved low-speed torque even with similar horsepower ratings as the previous 12L.
The X12 engine was tested in diverse terrain across the United States and Canada, according to Cummins, with more than 2 million miles of field testing. It provides smoother operation with fewer downshifts and more responsive torque at low speeds.
The X12 also offers fleets savings with its extended maintenance intervals, 25% fewer parts, and a 6% improvement in fuel economy due to enhanced engine efficiency and reduction of parasitic loss. The fuel savings alone amount to $10,800 over the life of a typical garbage truck at current diesel prices, Cummins noted.
"Built around improved uptime and reliability, the X12 will be in prime position to support Autocar's vision of 'Always Up'," said Brett Merritt, vice president of Cummins' on-highway engine business.