TEDOM introduces the new low-emission engine for continuous duty applications

calendar 05.02.2024

The new engine has a power output of 185kW and thus fills the gap between 150kW and 275kW engines currently available on the market.


While developing the engine, we also took into account possible future shifts in fuel composition. One significant change anticipated is the injection of hydrogen into the natural gas grid, which could potentially reduce the Methane Number below MN80—the minimum value required by many turbocharged engines. For the new engine was therefore chosen a robust Naturally aspirated stoichiometric concept. This choice gives the best preconditions to reach the lowest emissions and to utilize the fuels with lower knock resistance at the same time.

Stoichiometric engines can fully reach their low emission potential only when Air-Fuel-Ratio is properly controlled. Therefore, the new engine is equipped with an improved Bosch engine management system that incorporates a highly accurate Air-Fuel-Ratio control strategy. AFR control is based on two lambda sensors, one upstream and the second downstream of the 3-way catalyst. Such system is able to reach event the strictest emission limits and to guarantee desired emission stability.

The improved engine control system also incorporates other new functions. One new feature is misfire detection, which is capable of detecting each individual misfire and recognises faulty sparkplugs early enough to prevent potential emission spikes or catalyst damage. Another new function is knock detection. This integrated function is not only very sensitive and well protects the engine against damage caused by knocking but it also enables to save the costs of an independent knock detection system.

All TEDOM engines are primarily designed for continuous duty application, where durability and low life cycle costs are the key factors. Therefore, also the new engine has passed extensive in-house durability tests before release. After initial development in 2019 engine has already collected over 25.000 operating hours during in-house durability test for optimization of all details and service schedule verification.

We can proudly offer this new engine to the market and we wish it will contribute to the cleaner environment not only in the cities and residential areas.

Jan Bervic

Business manager, TEDOM Engines