Cummins, Hyliion to Optimize Natural-Gas Engine for Hypertruck ERX
Hyliion to Acquire GE Hydrogen and Fuel Agnostic Generator Tech
The acquisition pushes Hyliion toward its goal of releasing a fuel agnostic variant of its Hypertruck.

GE’s Karno generator creates a solution that will be capable of operating on over 20 different fuels including hydrogen, natural gas, propane, ammonia and conventional fuels.
Rendering: Hyliion
Hyliion will acquire a new hydrogen and fuel agnostic capable generator from GE Additive.
Hyliion will leverage GE’s Karno as the next generation generator onboard the Hypertruck, a Class 8 truck with electrified powertrain.
The generator will create a solution that will be capable of operating on over 20 different fuels including hydrogen, natural gas, propane, ammonia and conventional fuels. The technology uses heat to drive a sealed linear generator to produce electricity. The heat is produced by reacting fuels through flameless oxidation or other heat sources including renewables.
The Karno generator emerged out of GE’s long-running research and development investments in metal additive manufacturing across multiple industries and in areas such as generator thermal and performance design. Initial testing indicates the generator is expected to comply with all current and foreseeable emissions standards, specifically from the California Air Resources Board and the U.S. Environmental Protection Agency, even when utilizing conventional fuels.
The technology is expected to achieve a 20%+ efficiency improvement over today’s conventional generators and could be more efficient than most available fuel cells, Hyliion officials said. These efficiency improvements should, in turn, enable fuel cost reductions and improved vehicle range. The technology should also provide for significant reductions in noise, vibration, moving parts and maintenance as compared to current combustion engines.
In late 2023, Hyliion plans to first release the Hypertruck ERX powertrain, which leverages a natural gas engine as the generator onboard. In the years following, Hyliion plans to release the Hypertruck Karno, its fuel agnostic variant, as phase two in the Hyliion journey to a hydrogen-based future.
The transaction is subject to customary closing conditions and is expected to close by the end of the third quarter. With an acquisition value of about $37 million, GE will receive $15 million in cash and approximately $22 million in Hyliion stock. Hyliion will acquire the generator technology and integrate the Cincinnati-based engineering team that created the Karno system into Hyliion.
More Fuel Smarts

New Agentic Predictive Maintenance Report Demonstrates How Degraded Aftertreatment Systems Waste Fuel
Questar analyzed a large mixed-class fleet and discovered it was wasting as much as $30 in fuel per vehicle, per day, because of mechanically degraded aftertreatment systems.
Read More →
New York City's Microhub Project is Delivering Results
Trucking, last-mile delivery companies, and environmental advocates like what they are seeing so far with New York's microhub program.
Read More →
Lessons Learned About Alternative Fuels: Start Small, Stay Flexible
Practical advice on adopting alternative fuels and ZEVs from HDT's 2026 Top Green Fleets, from renewable diesel and natural gas to electric trucks.
Read More →
Kempower Adds Flex EV Charger to Help Support Transition to Megawatt Charging
The Kempower Mega Satellite Flex has both a CCS and MCS connector, allowing operators to serve both types of heavy-duty vehicles.
Read More →
Hino Adds Electric Class 6/7 Truck
Hino says the Le Series is an important step in the company's efforts to reduce environmental impact and support its customers’ sustainability goals.
Read More →
Can Multi-Speed EV Transmissions Solve Heavy Trucking’s Biggest Electric-Vehicle Problems?
A startup called Sigma Powertrain believes purpose-built multi-speed gearboxes can boost efficiency, reduce battery size and improve gradeability for heavy-duty battery-electric trucks.
Read More →
Hendrickson Debuts Electraax E-Axle for Medium-Duty Trucks
Developed with Driventic, Hendrickson's new integrated e-axle is designed to improve efficiency, reduce weight, and extend range in Class 6-7 EV applications.
Read More →
50 Ways Fleets Can Cut Fuel Costs Now — Without Buying New Trucks
Fuel savings don’t come from one big change. They come from dozens of small ones. Here’s how leading fleets are stacking gains across drivers, routing, maintenance, and more.
Read More →
Top Green Fleets 2026: How Fleets Are Reducing Emissions in the Real World
What works in sustainable trucking today? Heavy Duty Trucking's Top Green Fleets are finding practical ways to cut fuel use, reduce emissions, and keep freight moving.
Read More →
California Launching $1 Billion Electric Truck Rebate Program
CARB says the California Clean Fuel Reward program will begin offering point-of-sale rebates of up to $120,000 for electric commercial trucks starting June 26.
Read More →
