Intelligent power management company Eaton demonstrated at IAA Transportation 2026 how it is advancing both combustion and electrified commercial-vehicle powertrains, with technologies designed to improve efficiency, emissions performance, thermal management and electrification.
The company showcased its Turbulator cooling valve, the DURA4TRAK transfer case for light- and medium-duty commercial vehicles, a full family of Advantor automated manual transmissions (AMTs), and its Late Intake Valve Closing (LIVC) technology, which has been selected for commercial vehicle engine programmes in North America, Europe and Asia.
Transmissions for Every Load
Speaking to this publication, Mr. Janasi, Global Product Line Director – Commercial Powertrain, Mobility Group, Eaton, introduced the Advantor AMT family. It comes in 6-, 8- and 10-speed versions covering vehicles from five tonnes up to 55 tonnes. The family shares key components and a common software architecture, reducing complexity and simplifying service and maintenance. The transmissions also run on all-new software designed for better performance.
Advantor is launching at the same time in Brazil and India, where it is produced at Eaton’s plant in Ranjangaon, Pune. According to Mr. Janasi, it offers up to 10% better fuel efficiency than a manual transmission and up to 20% versus a traditional automatic transmission, depending on application, and two to three times longer clutch life, lowering the total cost of ownership. “We still believe we can continue improving efficiency in the combustion engine powertrain,” he said.
Rounding out the driveline portfolio is Eaton’s DURA4TRAK transfer case, a lightweight, geared 4×4/4×2 solution for light- and medium-duty commercial vehicles in the six to 15-tonne GVW/GCW range. Built at Eaton’s Ranjangaon facility in India, it handles up to 5,500 Nm of input torque and provides 1:1 high and 2:1 low ratio with a 50/50 front-to-rear torque split.
Keeping EVs Safe and Powered
For electric vehicles, Eaton focuses on distributing and protecting power from the battery. Alongside its well-known Bussmann fuses, it offers Breaktor, that is a resettable high-voltage circuit-protection device that integrates switching, circuit protection and fault detection in a single unit. Unlike conventional non-resettable protection devices, Breaktor is resettable, potentially reducing service downtime after a fault once the system has been checked and it is appropriate to restore operation.
The range also includes the Flex power distribution unit, which customers can set up to suit their vehicles. There was also a megawatt charging box. Eaton’s Combined MCS Charge Box supports megawatt-level charging for commercial vehicles, at up to 2,000 amps. There are also DC-DC converters that step down 800- or 400-volt power to 12 volts, along with high-voltage connectors. For buses, a pure sine wave inverter provides smooth, reliable AC power from regular plug points, so passengers can charge laptops on the road.
Eaton also displayed its heavy-duty four-speed central-drive EV transmission. The multi-speed transmissions can improve gradeability, acceleration and overall system efficiency in medium- and heavy-duty electric commercial vehicles while providing greater flexibility in gear-ratio selection. A single-speed gearbox is enough for lighter vehicles, but trucks and buses benefit from multiple gears, balancing cost and efficiency.
A New Job for an Old Favourite
Eaton’s supercharger was originally built for petrol passenger cars, where it delivered instant boost. Its mechanically driven TVS supercharger can provide immediate airflow at low engine speeds, complementing a turbocharger in a compound-boost configuration. As the car market shifted its focus to emissions and fuel economy, demand for it fell. Now the company has found it a new role in hydrogen engines for heavy-duty trucks.
Hydrogen engines need a lot of air, and at some engine speeds a turbocharger can’t supply enough. A supercharger fills that gap, as it can provide the excess airflow required to help hydrogen internal-combustion engines achieve diesel-like performance while supporting the high air-fuel ratios needed to meet future emissions requirements. A much smaller supercharger solves another problem.
A Valve That Keeps Its Cool
The engine valve is one of Eaton’s oldest products, and the Turbulator gives it a clever upgrade. It is a hollow valve filled with sodium, which carries heat away as it sloshes around inside. In commercial vehicle engines, which run at lower speeds, the sodium doesn’t move as much. Its Turbulator valve has a special internal part that makes the sodium inside the hollow valve move more. This helps the valve shed heat better, especially at the low and medium speeds that commercial vehicles often run at. The tests show it lowers the valve temperature considerably: in testing on an 11-liter heavy-duty diesel engine, it reported temperature reductions of up to 170°C along the valve stem and up to 55°C at the combustion face compared with a conventional hollow valve.
Smarter Braking From the Engine
Eaton’s 1.5-stroke decompression engine-brake technology provides an additional compression-release event during each engine cycle, increasing braking power compared with conventional single-stroke engine braking. The architecture uses a deactivating rocker arm together with an engine-brake rocker arm to disable the regular exhaust-valve motion and enable an additional valve opening. The system is already in production on commercial vehicles. The same switchable roller idea also lets engine makers choose between two different valve lifts on one rocker arm.
The newest development, now in testing, combines hydraulic lash adjustment with the decompression brake. According to the company, there’s nothing comparable exists on the market. It means the valve clearance never has to be set manually, saving time on the assembly line and trips to the workshop for owners. This is especially helpful on tractors, where the after-treatment system often sits above the engine and must be removed just to adjust the valves.
