engines

Autocar to get first Cummins X12 engines

JAMESTOWN, N.Y. -- Autocar Trucks will be the first North American truck manufacturer to offer the new Cummins X12 engine. The 11.8-liter X12 diesel engine will be offered in ACX refuse trucks beginning in October, when Cummins starts full production of the X12 at its Jamestown, N.Y. facility. Autocar will begin accepting orders for X12-powered trucks in June. According to Autocar, the X12 will net customers an additional 733 pounds of payload compared to the previous engine, the ISX12. The weight saving is achieved through an innovative sculpted block design, as well as weight reduction in the after-treatment system, power take-off, and other components. The X12 also offers improved low-speed torque, even with similar horsepower ratings. At 2,050 pounds dry weight, the X12 is the lightest engine in the market compared to existing 11-, 13-, and 15-liter engines.

Cummins X15 Pt 1: An Overview

COLUMBUS, IN -- As engine platforms go, Cummins' ISX has to be considered slightly remarkable. It was introduced in 1998, although the program that brought the engine to life began in 1994. It survived the transition to EGR (Exhaust Gas Recirculation) and then to SCR (Selective Catalytic Reduction) aftertreatment. Several other engines did not. And it's still very much alive and kicking today. We spent a day test driving a couple of production-intent versions of the 2017 X15 (as it's now known), and a current ISX15 for comparison.

IN PRINT — Power Plays: A look at 2017 engines

Most North American heavy-duty diesel engine manufacturers rolled out substantially revamped engines to meet the U.S. Environmental Protection Agency's (EPA's) 2017 Greenhouse Gas emissions regulations. Those rules were the final step for diesel engines in Phase 1 of the grand carbon dioxide reduction plan. Engine makers now have a few years to figure how to meet the next - and even more restrictive - round of fuel-efficiency improvements, which come into force for Model Year 2021 engines.