The Cat CT series vocational trucks, introduced in 2010, feature a unique engine lineup: the CT11, CT13, and CT15. These engines, rebranded by Caterpillar, are actually Navistar MaxxForce engines. This collaboration between Caterpillar and Navistar raises questions, especially considering Navistar’s evolving approach to meeting emission standards.
Navistar’s Shift in Emissions Strategy and the Impact on the CT13
In 2012, Navistar announced a significant shift in its emissions strategy. Moving away from its sole reliance on Exhaust Gas Recirculation (EGR), the company adopted a hybrid approach. This involved integrating components from Cummins’ after-treatment system, specifically their Selective Catalytic Reduction (SCR) technology, with Navistar’s existing EGR system. This new strategy, termed ICT+ (in-cylinder technology), aimed to meet the 2010 EPA emissions standards.
This strategic shift impacted Caterpillar’s CT series, including the CT13. While Caterpillar confirmed that its CT engines would continue to utilize advanced EGR, they also announced the incorporation of a “proven liquid-based after-treatment” system. This strongly suggests the integration of Cummins’ SCR technology into the CT13 and other CT series engines.
The CT13 Cat Engine: A Temporary Alliance with Cummins Inside?
Given Navistar’s reliance on Cummins’ after-treatment components at the time, it’s highly likely that the CT13 engine, along with its CT siblings, temporarily utilized Cummins’ SCR technology. This created a unique situation where Caterpillar, a global leader in diesel engines, indirectly incorporated technology from a competitor into its CT series.
However, this collaboration was likely a temporary measure. Navistar’s long-term plan presumably involved developing its own proprietary after-treatment system. Until that system was ready, Caterpillar relied on Navistar’s engine technology, which, in turn, incorporated Cummins’ SCR solution.
The Future of the CT13 and the Caterpillar-Navistar Partnership
The CT13 engine represents a fascinating chapter in the history of diesel engine technology, highlighting the complex relationships and strategic alliances within the industry. The temporary integration of Cummins’ SCR technology underscores the challenges of meeting stringent emission standards and the innovative solutions employed by manufacturers. While the CT13 may no longer utilize Cummins’ components, its development provides valuable insight into the evolution of engine technology and the collaborative efforts required to meet environmental regulations. This partnership between Caterpillar and Navistar, albeit with a Cummins influence, ultimately aimed to deliver powerful and efficient engines like the CT13 to the vocational truck market.
