Novel internal combustion engine for hydrogen combustion

OTECHOS Centric Reciprocating Technology (CR-T) is a ground-breaking reinvention of the classic internal combustion engine.


One of the targets of the EU’s 2020 climate and energy package is a 20 per cent reduction in greenhouse gas emissions compared with 1990 levels. A proposed measure for meeting this target, as well as the targets of the Paris Agreement, is the phasing-out of the internal combustion engine (ICE) in passenger cars, or, alternatively, the use of hydrogen-fuelled engines.

However, the power delivery capability of ICEs remains unmatched. ICEs are essential for the transport and distribution of goods, as well as the operation of heavy machinery, drones, farm equipment, forestry equipment, mining machines, cargo ships and much more.

In addition to having limited efficiency, the fundamental technology of the ICE has been virtually unchanged since 1876. A standard ICE relies on the use of pistons and valves, which require lubrication and suffer from wear and tear. The efficiency of an ICE is also restricted by its compression ratio and operating temperatures.

Innovative redesign of the internal combustion engine

OTECHOS has replaced the format of standard piston engine technology with its Centric Reciprocating Technology (CR-T). The result is a high power density engine (CR engine) that is 30 per cent more fuel-efficient than traditional ICEs.

Its high power density makes this engine suitable for dilute hydrogen combustion with zero emissions. The combination of zero emissions with high efficiency provides unlimited potential for CR engines, including in aerospace applications such as drone propulsion. These improvements are made possible by replacing pistons and valves with a patented configuration of circular and elliptical gears, creating a motion that is constant and unidirectional. A CR engine is about half the size and weight of traditional engines with similar horsepower, with low noise and vibration. Its advanced design provides high temperature resistance and durability.

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Concrete benefits

Internal combustion engines (ICE) are ubiquitous in modern industry and transportation because of their high rate of power delivery. The replacement of ICE with CR engines has the potential to increase energy efficiency by up to 30 per cent, thereby reducing associated CO₂ emissions even if hydrocarbon fuel is used.

Furthermore, CR-T can be used to make pumps, compressors and heat recovery systems, providing vast opportunities for improving energy efficiency.

Market potential

The global market potential for OTECHOS CR-T is virtually unlimited. Engines, pumps and compressors are used in every industry, in thousands of applications.

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Fjærkleivene 52, 4900 TVEDESTRAND, Norway

+47 901 69 070

At a glance

  • Suitable for hydrogen combustion, 30% more fuel-efficient

  • Few moving parts, no valves, pistons or lubricants

  • Low maintenance, 35% reduction in operating costs



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