Bosch at bauma 2025 – For hydrogen engines, around 80 percent of the technology can be transferred from combustion engines
Stuttgart and Munich, Germany – Over one million new construction vehicles will be produced worldwide in 2025 alone. As different as their performance classes and tasks are, they almost all have one thing in common: a diesel engine. Its robustness and strength make it the ideal powertrain for a wide range of applications. At the bauma 2025 trade fair, Bosch will be showing how carbon emissions can be reduced even further in this vehicle segment.
Jan-Oliver Roehrl, executive vice president of the Bosch Power Solutions division and head of commercial vehicle activities at Bosch, says:
Renewable synthetic fuels make operating both new and existing vehicles much more climate-friendly,
“And in the future, hydrogen engines and electrification also stand to make construction machinery much more sustainable.”
Renewable synthetic fuels make combustion engines more climate-friendly
Construction vehicles are already subject to comprehensive exhaust-emission regulations, such as Stage V in Europe, Tier 4 in the U.S., and Phase IV in China. To date, however, their climate-relevant emissions have been regulated only to a limited extent, at least by law. One simple option for greatly reducing their carbon emissions that is already available today is to use renewable synthetic fuels such as HVO100. Because these fuels are based on residual and waste materials, they are much more climate-friendly than fossil fuels in terms of overall carbon emissions. They are also “drop-in” fuels, meaning they can be mixed with normal diesel fuel as required. Since Bosch already takes compatibility with these fuels into account when developing its injection technology, they are suitable for use in its products.
According to Bosch forecasts, four out of five new construction vehicles worldwide with over 56 kilowatts will still have a diesel engine in 2035. That is why Bosch will continue to develop injection technology and urea dosing technology for exhaust-gas treatment in the future to suit the various segments of the construction machinery market.
The Digital Fuel Twin documents the use of renewable synthetic fuels
Renewable synthetic fuels can make construction machinery more climate-friendly: the more of it they use, the smaller the carbon footprint of each individual vehicle. Bosch makes this effect visible with a purely digital software solution called the Digital Fuel Twin. This documents the amounts of fuel distributed as well as the fuels’ sustainability, from production and transportation all the way to the filling station. It provides the operators of construction machinery with certificates corresponding to how they have refueled their vehicles; these document the total amounts of fuel used and even the proportionate carbon footprint when using the vehicle.
Hydrogen engines build on tried-and-tested foundations
When it comes to hydrogen engines, German manufacturers and suppliers can draw on decades of expertise, particularly in the field of engine technology: some 80 to 90 percent of the technology involved can be transferred from conventional combustion engines. If the hydrogen fueling the engines is produced with renewable energy, their use could mark a big step forward for the climate. Often, construction machinery is stationary and operates under heavy loads.
Roehrl says.
This is precisely where hydrogen engines, with their high efficiency and robustness, can really excel,
“The first applications of hydrogen engines featuring Bosch injection technology will be launched this year.”
Bosch is working on both port- and direct-injection systems and is already involved in more than 100 development projects with customers worldwide. Moreover, the hydrogen engine is also a promising option for large engines, for example as the powertrain for dump trucks in mining. Here, too, robustness and reliability combined with a compact design are essential for economical operation.
Electrification solutions for construction machinery
In certain construction machinery applications, electrification is another efficient and climate-friendly option for mobile and stationary functions. With its eLION electrification portfolio, Bosch Rexroth already offers a wide range of motors, inverters, gearboxes, software, and accessories, including the appropriate hydraulics. This Bosch subsidiary is currently expanding its range to include components for 96-volt vehicle electrical systems; at the end of 2025, it will introduce a standardized software platform for all voltage classes. Bosch Engineering, meanwhile, is presenting a newly developed high-performance solution for battery voltages of up to 800 volts. This subsidiary’s new electric powertrain system is compact and offers high power density as well as high efficiency. It is also suitable for construction machinery with high power requirements and limited installation space, such as wheel loaders.
Bosch, Bosch Rexroth, and Bosch Engineering will be showcasing these solutions at bauma, at booths A3/327 and A4/526.
READ the latest news shaping the hydrogen market at Hydrogen Central
Bosch at bauma 2025 – For hydrogen engines, around 80 percent of the technology can be transferred from combustion engines, source
