The Future Is Two-Stroke!
V4 is the new V8
DUETEC relies on a novel two-stroke architecture with forced induction and an electronically modulated rotary exhaust valve system (EMREV), matching the output potential and firing frequency of boosted four-stroke engines twice the displacement and cylinder count. In practical terms: a DUETEC V4 replaces a conventional turbocharged V8, maintaining the same dynamic signature at a fraction of the mass and mechanical complexity.
DUETEC enables superior operational flexibility, allowing seamless transitions between multiple operating modes ranging from ECO, achieving over 60% thermal efficiency, to PERFORMANCE, delivering upwards of 500 horsepower per liter at about 10 horsepower per kilogram.
Central to achieving these extreme figures is a fully carbon-ceramic combustion environment featuring Porous Media Combustion (PMC). PMC enables ultra-lean, flameless volumetric combustion with near-instant pressure rise rates. This closely approaches the ideal Otto-cycle with true constant-volume combustion, dramatically improving fuel economy and achieving near-zero emissions even without exhaust treatment.
Air Pump vs Reactor
In boosted four-stroke engines, intake and exhaust strokes offer little to no mechanical utility, since air is forced in by the induction system and exhaust gases are evacuated mostly through pressure differential rather than piston action.
DUETEC removes the piston from the pumping equation, using it merely for charge compression and mechanical energy extraction. Mass airflow is managed by an electro-/turbo-assisted supercharger operating in tandem with an electric rotary exhaust valve system. This streamlined setup allows precise electronic control of charge pressure, residual gas fractions, and effective compression ratio, with minimal mechanical effort.
The cost savings from this radical simplification are reinvested into advanced technical ceramics as the primary structural material for the combustion environment, ensuring operational reliability under extreme thermal and mechanical loads. With no poppet valves in the cylinder head, valuable real estate is freed for integrating the Porous Media Combustion technology alongside multiple injectors, ignition systems, and sensors — effectively turning DUETEC into a high-precision thermodynamic reactor rather than the crude air pump conventional engines are often reduced to
For a more comprehensive technical breakdown, visit our YouTube channel and explore the engineering behind DUETEC in detail…