Alpha-Otto Technologies introduces REV Force, a radically new hydrogen-compatible engine platform that combines a patented mode of engine operation with an advanced combustion strategy to redefine what’s possible in clean, distributed power.

At the core of REV Force is a proprietary engine architecture that delivers a power stroke with every revolution of the crankshaft, effectively doubling the power density compared to conventional four-stroke engines. The REV Force design decouples pumping work from the piston, leveraging an external air management system that precisely controls intake and exhaust flows. This eliminates the inherent inefficiencies and emissions of traditional scavenging, enabling superior thermal control, lower parasitic losses, and significantly more compact packaging.

This novel engine foundation enables Alpha-Otto’s second major innovation: Spark-assisted Turbulent Low-Temperature Combustion (STLTC)—a combustion process specifically engineered to harness the unique properties of hydrogen while avoiding its well-known drawbacks. Hydrogen has long been considered a promising zero-carbon fuel, but its application in internal combustion engines has been limited by pre-ignition, uncontrolled flame speeds, backfire, and high NOx emissions at elevated temperatures.

STLTC addresses these challenges by creating a carefully controlled, low-temperature combustion environment with:

• High-turbulence charge motion to promote even mixing and rapid, stable flame propagation
• Air preconditioning to reduce in-cylinder temperature peaks
• Spark-assisted ignition that enables ultra-lean combustion and mitigates knock
• Precision hydrogen injection strategies to tailor the combustion event dynamically

Together, the REV Force engine’s architecture and combustion strategy form a tightly integrated solution that enables stable hydrogen combustion with exceptional thermal efficiency and near-zero NOx emissions, even under ultra-lean conditions. By lowering in-cylinder peak temperatures and decoupling combustion phasing from piston-driven airflow, STLTC makes it possible to exploit hydrogen’s fast flame speed and wide flammability range—without triggering instability or emissions spikes.

This engine is purpose-built for clean, decentralized power applications where fuel flexibility, robustness, and fast response are essential. Critically, it addresses the availability gap left by intermittent renewable sources like solar and wind, providing fast-ramping, clean backup and supplemental power that can operate when other renewables cannot. Whether it’s nightfall, low wind periods, or unpredictable demand spikes, REV Force ensures continuous power availability without compromising on emissions.

The architecture supports operation on a range of fuels, but is optimized for clean hydrogen. A functioning prototype has already demonstrated successful hydrogen operation, validating both the STLTC strategy and manufacturability of the platform.

Applications include:

• High-efficiency, low-emission backup power for data centers
• Distributed clean power in microgrids and EV charging infrastructure
• Mobile and hybrid-electric power units for defense and aerospace
• Remote or backup power for critical and off-grid infrastructure

REV Force offers a breakthrough in hydrogen combustion by addressing the root technical barriers of prior systems. With a compact form factor, patented high-output architecture, and a combustion system tailored for efficiency and zero emissions, Alpha-Otto’s REV Force engine is not just an improvement—it's a redefinition of what hydrogen power can be.