Cummins Unveils Next-gen X15 Diesel Engine

The X15 diesel engine is capable of using biodiesel blends up to 20% and renewable diesel blends up to 100%.

The X15 diesel engine is capable of using biodiesel blends up to 20% and renewable diesel blends up to 100%.
The X15 diesel engine is capable of using biodiesel blends up to 20% and renewable diesel blends up to 100%.
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Cummins has announced it will launch the next generation X15 diesel engine. As the next product in the Cummins HELM 15-liter fuel agnostic platform, the X15 will be compliant with U.S. EPA and CARB 2027 aligned regulations at launch. The next generation X15 diesel engine in North America will serve the heavy-duty on-highway market.

“We have applied our decades of experience with the X15 to our next-generation product and believe these investments will serve our customers well into the future. The next generation X15 is the next evolution of technology, truly proving to the world that we never stop innovating,” said José Samperio, vice president, North America On-Highway at Cummins. “We are working hard to ensure the new product delivers our brand promise to customers for the important jobs they need to do every day.”

Next Gen X15 Powertrain Shad Cam05Cummins

The next generation diesel X15 will retain the same ratings of the current X15 (up to 605 hp and 2,050 ft. lbs. of torque) and support powertrain integration with Eaton Cummins and Cummins-Meritor.

“Today, we re-introduce our fuel agnostic engine platforms with a name that captures the innovation that powers us forward: the Cummins HELM platforms,” said Jane Beaman, vice president Global, On-Highway Business, Cummins. “With higher efficiency, lower emissions, and multiple fuels, the Cummins HELM platforms give our customers control of how they navigate their own journeys as part of the energy transition. They can choose the fuel types that work best for them, their businesses, and their goals.”

This next generation engine will have capability to meet future emissions regulations beyond 2027 with minimal architecture changes.

“This new architecture expands on the legacy of the X15 engine. All teams involved recognize how important this product is and what it means for both Cummins and our customers’ future as the base architecture will carry us through the horizon of diesel technology and alternate fuels,” said Jonathon White, vice president, Engine Business Engineering, Cummins.

From its inception, the next generation X15 was developed with Cummins’ fully integrated powertrain in mind. The X15 architecture utilizes a belt-driven, high output 48-volt alternator and aftertreatment heater solution for meeting emission standards.

Customers leveraging EX ratings (requires Eaton Cummins Endurant and GPS look-ahead data) with Cummins Meritor axles, brakes and drivelines will experience additional drivability through features such as predictive gear shifting, on-ramp boost and hill roll out.

Eaton Cummins Endurant

The Endurant HD and XD series are optimized for the next generation X15 powertrain. All with transmission lube change intervals up to 750,000 miles as well as remote diagnostic capabilities.

Cummins-Meritor Drivetrain Systems

The Cummins-Meritor 14X HE tandem drive axles are designed for performance and durability. They are equipped with a proprietary Meritor lube management system (MLMS) and feature fast ratio options, bearings and spiral bevel gearing. Cummins-Meritor Permalube RPL drivelines are designed for reduced maintenance and have the ability to handle the high torque demands of today’s downsped engine platforms.

(2024) X15 N Fa Cam01 FinalCummins

Cummins HELM Platforms

The engine is built on Cummins’ HELM fuel agnostic 15-liter engine platform. These new fuel agnostic engine platforms feature a series of engine versions that are derived from a common base engine, which means they have some parts commonality. Below the head gasket of each engine will have similar components and above the head gasket will have different components for different fuel types. Each engine version will operate using a different, single fuel. The X15N, the natural gas variant, is the first engine on the Cummins HELM platforms available to customers. The Cummins HELM platforms include the B, X10 and X15 engine platforms.

Low Carbon Diesel Fuels

Aligned with Cummins diesel engine portfolio, the new X15 is capable of using biodiesel blends up to 20% and renewable diesel blends up to 100%. These low carbon diesel fuels help reduce carbon intensity of diesel fuel consumption and are available in today’s fueling infrastructure.  

Cummins Digital Capability

The new X15 is equipped with Acumen, which provides digital connectivity and direct access to a range of applications and capabilities. These capabilities include over-the-air calibration, predictive service recommendations and additional features that help fleets keep their trucks and equipment on the road.

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